Specification
Title of Invention: Electrode assembly manufacturing method and manufacturing apparatus, secondary battery manufacturing method including same
technical field
[One]
Cross Citation with Related Applications
[2]
This application claims the benefit of priority based on Korean Patent Application No. 10-2019-0161729 dated December 06, 2019 and Korean Patent Application No. 10-2020-0154997 dated November 18, 2020, All content disclosed in the literature is incorporated as a part of this specification.
[3]
technical field
[4]
The present invention relates to an electrode assembly manufacturing method and manufacturing apparatus capable of increasing stacking alignment, and a secondary battery manufacturing method including the same.
background
[5]
In general, a secondary battery refers to a battery capable of charging and discharging unlike a primary battery that cannot be charged, and such secondary batteries are widely used in high-tech electronic devices such as phones, notebook computers, and camcorders.
[6]
The secondary battery is classified into a can-type secondary battery in which the electrode assembly is embedded in a metal can, and a pouch-type secondary battery in which the electrode assembly is embedded in a pouch, and the electrode assembly has a stack-type structure, a wound-type (jelly roll type) structure, or a stack. It is classified as a /folding structure, and the stacked electrode assembly has a structure in which a plurality of basic units are stacked.
[7]
However, the stacked electrode assembly has a problem in that a plurality of basic units are not uniformly stacked.
DETAILED DESCRIPTION OF THE INVENTION
technical challenge
[8]
The present invention was invented to solve the above problems, and the present invention is to provide a method and apparatus for manufacturing an electrode assembly capable of increasing stacking alignment through position measurement of basic units, and a method for manufacturing a secondary battery including the same The purpose.
means of solving the problem
[9]
The electrode assembly manufacturing method of the present invention for achieving the above object is (a) a plurality of basic units in which a first electrode, a separator, a second electrode and a separator are sequentially stacked from a first setting position to a second setting position transferring to (b) The basic unit is photographed at the first set position, and the distance between the full-width end, which is the end in the full-width direction of the first electrode, and the full-width end, which is the end in the full-width direction of the second electrode provided in the first photographed primitive (A1) ), the distance (A2) between the full-width end of the first electrode provided in the photographed second basic unit and the full-width end of the second electrode in the full-width direction (A2), the nth element provided on the photographed nth primitive A measuring step of measuring the distance (An) between the full-width end of the first electrode in the full-width direction and the full-width end of the second electrode in the full-width direction; (c) When the first basic unit whose A1 is measured is transferred to the second setting position, the B1 measurement process of measuring the distance (B1) from the reference point (O) of the second setting position to the end of the full width of the first electrode of the first basic unit is performed. providing; (d) stacking a second basic unit transferred to a second setting position through the first setting position on top of the first basic unit; (e) providing a B2 measurement step of measuring a distance (B2) from the reference point (O) of the second set position to the end of the full width of the first electrode of the second basic unit; (f) adding B2 and A2 and then subtracting B1 to measure the distance (C1) between the end of the full width of the first electrode of the first basic unit and the end of the full width of the second electrode of the second base unit; And (g) after comparing the C1 and A1, if it is located within the input error value, it is determined that the stack is normal, and when it is located outside, it is determined that the stack is defective.
[10]
The step (b) may further include a step of determining that the A1 measured in the A measurement process is within the input set value, judging it as normal, and judging it as a failure if it is located outside the A1 measurement process.
[11]
The step (b) may further include a step of removing the basic unit from being transferred to the second setting position when it is determined that the basic unit is defective at the first setting position.
[12]
In step (b), the distance between the full width end of the first electrode and the full width end of the second electrode of the basic unit at the first set position may be measured using a vision alignment tester.
[13]
The step (c) further includes the step of checking whether the reference point (O) of the second installation position matches the reference point of the basic unit, and the reference point of the basic unit is a line corresponding to and equal in the entire width direction of the basic unit; It may be a point at which equal equal lines intersect in the direction of the full length.
[14]
If the reference point (O) of the second installation position and the reference point of the basic unit do not match, the step (c) further includes a process of moving the basic unit to match the reference point (O) of the second installation position and the reference point of the basic unit can do.
[15]
The step (g) may further include a step of adjusting the position of the second basic unit by a difference between C1 and A1 of the first basic unit when it is determined that the stacking is defective in the full-width inspection process.
[16]
In step (a), the first electrode may have a smaller area than the second electrode.
[17]
The step (g) may further include a step of bonding the first basic unit and the second basic unit when it is determined that the normal stacking is performed.
[18]
(h) after step (g), stacking an n-th basic unit transferred to a second setting position through the first setting position on top of the second basic unit; (i) providing a Bn measuring step of measuring a full width distance (Bn) from a reference point (O) of a second set position to the end of the first electrode full width of the n-th basic unit; (j) Measure the distance (Cn) between the end of the full width of the first electrode of the second base unit and the end of the full width of the second electrode of the nth base unit by adding Bn and An of the nth base unit and then subtracting B2 of the second base unit providing a Cn measurement process; and (k) comparing Cn with A2 of the second basic unit, and determining that the stacking is normal if it is located within the input error value, and judging that the stack is defective if it is located outside the input error value.
[19]
In step (b), the distance (D1) between the full-length end of the first electrode provided in the photographed first basic unit and the full-length end of the second electrode in the full-length direction, the photographed second basic unit The distance (D2) between the full-length end, which is the end in the full-length direction, of the first electrode provided in the and a D measuring step of measuring a distance (Dn) between the full-length end and the full-length end of the second electrode in the full-length direction, wherein the step (c) is performed when the first basic unit is transferred to the second set position. , an E1 measurement step of measuring a distance (E1) from the reference point (O) of the second set position to the full-length end of the first electrode of the first basic unit, wherein the step (e) includes the reference point ( E2 measurement step of measuring the distance (E2) from O) to the full length end of the first electrode of the second basic unit, wherein step (f) includes adding E2 and D2 of the second basic unit and then subtracting E1 for the first and measuring a distance (F1) between the full-length end of the first electrode of the basic unit and the full-length end of the second electrode of the second basic unit, wherein the step (g) includes: the F1 and D1 of the first basic unit After preparing for , it may be determined that the normal stacking if located within the input error value, and may further include a full-length inspection process of determining the defective stacking if located outside.
[20]
The step (g) may further include a step of adjusting the position of the second basic unit by a difference between the F1 and D1 of the first basic unit when it is determined that the stacking is defective in the electric field inspection process.
[21]
The step (i) further includes an En measuring step of measuring a distance (En) from the reference point (O) of the second set position to the full-length end of the first electrode of the n-th base unit, and the step (j) is the n-th The Fn measurement process of measuring the distance (Fn) between the full length end of the first electrode of the second base unit and the full length end of the second electrode of the nth base unit by adding En and Dn of the base unit, then subtracting D2 of the second base unit Further, the step (k) may further include a step of comparing Fn with D2 of the second basic unit, determining that the stack is normal if it is located within the input error value, and determining that the stack is defective if it is located outside the input error value. have.
[22]
On the other hand, the secondary battery manufacturing method of the present invention comprises the steps of (A) manufacturing an electrode assembly according to claim 1; and (B) accommodating the electrode assembly in a battery case, and injecting an electrolyte into the battery case to manufacture a secondary battery.
[23]
The electrode assembly manufacturing apparatus of the present invention includes: a loading box in which a plurality of basic units in which a first electrode, a separator, a second electrode and a separator are sequentially stacked are stacked in a vertical direction; Transfer of transferring the uppermost basic unit among the basic units loaded in the loading box to the first setting position (H1), and then transferring the basic unit at the first setting position (H1) to the second setting position (H2) absence; The distance A1 from the end of the first electrode provided in the first transferred basic unit at the first set position H1 to the end of the second electrode, and the end of the first electrode provided in the second transferred basic unit a first measuring member for measuring the distance (A2) from the to the end of the second electrode; and measuring the first transferred basic unit transferred to the second setting position H2, but measuring the distance B1 from the reference point O of the second setting position H2 to the end of the first electrode of the first transferred basic unit and measure the distance (B2) from the reference point (O) of the second set position (H2) to the tip of the first electrode of the second transferred basic unit stacked on the upper side of the first transferred basic unit, and After adding B2 and A2, subtract B1 of the first transferred basic unit to measure the distance (C1) between the first electrode end of the first transferred basic unit and the second electrode end of the second transferred basic unit, and the C1 and A second measuring member may be included to determine that the first transferred basic unit is located within the input error value, and determines that it is a defective stack, if the difference value is within the input error value.
Effects of the Invention
[24]
In the electrode assembly manufacturing method of the present invention, it is possible to check the stacking failure of the basic units to be stacked with each other, and in particular, when the stacking is defective,By changing the position, the stacking alignment can be improved.
Brief description of the drawing
[25]
1 is a side view showing an electrode assembly according to a first embodiment of the present invention.
[26]
2 is a view showing an electrode assembly manufacturing apparatus according to a first embodiment of the present invention.
[27]
3 is a flowchart illustrating a method for manufacturing an electrode assembly according to a first embodiment of the present invention.
[28]
4A and 4B are side views showing step (b) of the electrode assembly manufacturing method according to the first embodiment of the present invention.
[29]
Fig. 5 is a plan view of Fig. 4A;
[30]
6A and 6B are side views showing step (c) of the electrode assembly manufacturing method according to the first embodiment of the present invention.
[31]
Fig. 7 is a plan view of Fig. 6A;
[32]
8 is a side view showing a process of correcting the position in step (c) of the electrode assembly manufacturing method according to the first embodiment of the present invention.
[33]
Figure 9 is a side view showing the step (d) of the electrode assembly manufacturing method according to the first embodiment of the present invention.
[34]
10A and 10B are side views showing steps (e), (f) and (g) of the electrode assembly manufacturing method according to the first embodiment of the present invention.
[35]
11A and 11B are side views showing steps (h), (i), (j) and (k) of the electrode assembly manufacturing method according to the first embodiment of the present invention.
[36]
12 is a cross-sectional view illustrating a secondary battery according to a second embodiment of the present invention.
Best mode for carrying out the invention
[37]
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily carry out the present invention. However, the present invention may be embodied in several different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.
[38]
[Electrode assembly according to the first embodiment of the present invention]
[39]
In the electrode assembly 100 according to the first embodiment of the present invention, as shown in FIG. 1 , the same number of electrodes and separators are alternately arranged and integrally coupled basic units 110 are repeatedly arranged. have a structure
[40]
For example, the electrode assembly 100 according to the first embodiment of the present invention includes a plurality of basic units 110 stacked in the vertical direction, and the basic unit 110 includes a first electrode 111, a separator ( 112), the second electrode 113, and the separator 112 have a four-layer structure in which they are sequentially stacked.
[41]
In this case, the first electrode 111 and the second electrode 113 are opposite to each other. For example, if the first electrode 111 is an anode, the second electrode 113 is a cathode. And the first electrode 111 has a smaller area than the second electrode 113 .
[42]
The electrode assembly 100 according to the first embodiment of the present invention having such a laminated structure is manufactured through an electrode assembly manufacturing apparatus.
[43]
[Electrode assembly manufacturing apparatus according to the first embodiment of the present invention]
[44]
In the electrode assembly manufacturing apparatus according to the first embodiment of the present invention, as shown in FIG. 2 , a plurality of basic units are stacked in the vertical direction, but can be stacked to be aligned at the same position, stacking box 200 , a transfer member 300 , a first measuring member 400 , and a second measuring member 500 .
[45]
stowage
[46]
The loading box 200 is for loading the plurality of basic units 110 in the vertical direction, a loading space opened upward is formed, and the plurality of basic units 110 are loaded in the loading space.
[47]
transfer member
[48]
The transfer member 300 withdraws the basic unit 110 loaded at the top of the basic unit 110 loaded in the loading box 200 out of the loading box 200, and then transports it to the first setting position H1, Again, the basic unit 110 at the first setting position H1 is transferred to the second setting position H2. Here, the transfer member 300 may be a gripper or a conveyor belt.
[49]
first measuring member
[50]
The first measuring member 400 is for measuring the position of the basic unit 110 at the first setting position H1 , and includes a first lighting unit 410 and a first measuring unit 420 .
[51]
The first lighting unit 410 is provided on the bottom surface of the basic unit 110 at the first setting position H1, and illuminates by irradiating light toward the bottom surface of the basic unit 110 . Then, the second electrode 113 is illuminated on the separator 112 located at the uppermost end by the light of the first lighting unit 410 , and thus the position of the second electrode 113 disposed between the separators 112 is confirmed. can
[52]
The first measuring unit 420 is for measuring the basic unit transferred to the first setting position H1, and the first transferred basic unit 110 at the first setting position H1 (hereinafter referred to as the basic unit) The distance A1 between the end of the first electrode 111 and the end of the second electrode 113 displayed on the separator 112 in the photographed image is obtained by photographing the upper portion of the basic unit 110 and measure
[53]
That is, the first measurement unit 420 photographs the upper portion of the basic unit 110 at the first setting position H1, and the tip of the first electrode 111 in the photographed upper surface image of the basic unit 110 . to measure the distance A1 from the to the end of the second electrode 113 . At this time, if the measured A1 is located within the input setting value, the first measurement unit 420 determines that it is normal, and if it is located outside the input setting value, it is determined that it is defective. In particular, if the first measurement unit 420 determines that it is defective, it removes the defective basic unit 110 at the first setting position H1 so that it is not transferred to the second setting position H2.
[54]
Meanwhile, the first measurement unit 420 includes an end of the first electrode 111 of the second basic unit transferred second to the first setting position H1 and an end of the second electrode 113 displayed on the separator 112 . between the distance A2 and the end of the first electrode 111 of the n-th basic unit transferred to the n-th base unit to the first setting position H1 and the end of the second electrode 113 displayed on the separator 112 Measure the distance (An) continuously.
[55]
second measuring member
[56]
The second measuring member 500 is for measuring the basic unit 110 transferred to the second setting position H2 , and includes a second lighting unit 510 and a second measuring unit 520 .
[57]
The second lighting unit 510 is provided under the basic unit 110 transferred to the second setting position H2 and illuminates by irradiating light toward the basic unit 110 transferred to the second setting position H2. do.
[58]
The second measuring unit 520 is for measuring the basic unit 110 transferred to the second setting position H2. Measure the distance B1 to the end of the first electrode 111, and from the reference point O of the second set position H2 to the second transferred basic unit stacked on the upper side of the first basic unit (hereinafter referred to as the second basic unit) ) to the end of the first electrode 111, measure the distance B2, add B2 and A2 of the second base unit 110, then subtract B1 of the first base unit 110 to obtain the first base unit 110 The distance C1 between the end of the first electrode 111 and the end of the second electrode 113 of the second basic unit 110 is measured, and the difference between C1 and A1 of the first basic unit is calculated within the input error value. If it is located, it is judged as normal lamination, and if it is located outside, it is judged as defective lamination.
[59]
That is, the second measuring member 500 measures the stacking alignment of the basic unit 110 sequentially stacked at the second setting position H2 through the second lighting unit 510 and the second measuring unit 520 . In particular, when a stacking error occurs, the degree of stacking alignment can be increased by adjusting the position of the second basic unit by the error value.
[60]
Therefore, in the electrode assembly manufacturing apparatus according to the first embodiment of the present invention, the basic units 110 can be sequentially stacked at the same position, and as a result, the stacking alignment can be increased.
[61]
Hereinafter, a manufacturing method using the electrode assembly manufacturing apparatus according to the first embodiment of the present invention will be described.
[62]
[Method for manufacturing electrode assembly according to the first embodiment of the present invention]
[63]
As shown in Figs. 3 to 11b, the method for manufacturing an electrode assembly according to the first embodiment of the present invention includes (a) a basic unit transfer step, (b) a basic unit measurement step at a first set position, (c) ) Step of measuring the distance between the second set position and the first basic unit, (d) the step of stacking the first and second basic units, (e) the step of measuring the distance between the second set position and the second basic unit, (f) the first basic unit measuring a distance between the unit and the second basic unit; and (g) determining whether the unit is defective by comparing the measured value of the first basic unit with the measured value of the second basic unit.
[64]
Hereinafter, a method for manufacturing an electrode assembly according to a first embodiment of the present invention will be described in detail with reference to the accompanying drawings. On the other hand, x shown in FIG. 1 is the full width direction of the basic unit, and y is the full length direction of the basic unit.
[65]
(a) step
[66]
In step (a), referring to FIG. 2 , the plurality of basic units 110 loaded in the loading box 200 are moved one by one from the first setting position H1 to the second setting position H2 using the transfer member 300 . ) to the For example, in the step (a), the first basic unit 110 loaded at the top of the plurality of basic units 110 loaded in the loading box 200 is transferred to the first setting position H1, and after the setting time, the second basic unit 110 is transferred. 1 The basic unit 110 at the setting position H1 is transferred to the second setting position H2. Next, the second basic unit 110 loaded on the top of the plurality of basic units 110 is transferred to the first setting position H1, and after the setting time, the second basic unit 110 is located at the first setting position H1. is transferred to the second setting position (H2). Next, the nth basic unit 110 loaded on the top of the plurality of basic units 110 is transferred to the first setting position H1, and the nth basic unit 110 at the first setting position H1 after the setting time ( 110) to the second setting position (H2). In this way, the step (a) is loaded in the loading box 200.All of the basic units 110 are transferred.
[67]
At this time, in step (a), when the first basic unit 110 is present at the second set position H2, the second basic unit 110 is stacked thereon, and up to the n-th basic unit 110 is laminated. Accordingly, an electrode assembly in which the first basic unit, the second basic unit, and the nth basic unit are stacked from bottom to top is manufactured at the second set position H2.
[68]
Meanwhile, the basic unit 100 has a four-layer structure in which a first electrode 111 , a separator 112 , a second electrode 113 , and a separator 112 are sequentially stacked.
[69]
Hereinafter, for clarity of explanation, a basic unit first drawn out from the loading box 200 is referred to as a first basic unit, and reference numeral 110A is used. And the second basic unit drawn out from the loading box 200 and stacked on top of the first basic unit 100A is referred to as the second basic unit, and reference numeral 110B is used. In addition, the n-th base unit drawn out from the loading box 200 and stacked on top of the second base unit 100B is referred to as the n-th base unit, and reference numeral 110N is used.
[70]
Meanwhile, an arrangement plate for arranging the basic unit is provided at the first setting position H1 and the second setting position H2, and the basic unit can be stably arranged through the arrangement plate.
[71]
Therefore, in step (a), the first basic unit 110A among the plurality of basic units loaded in the loading box 200 is transferred from the first setting position H1 to the second setting position H2.
[72]
(b) step
[73]
Step (b) includes a step A measurement process, as shown in FIG. 4A , the basic unit transferred to the first setting position H1 using the first measurement member 400, that is, The first basic unit 100A is photographed, and the end in the full width direction (x) of the first electrode 111 provided in the first basic unit 100A in the photographed image (the right end of the first electrode as seen in FIG. 4A ) The distance A1 between the full-width end and the full-width end of the second electrode 113 in the full width direction (x) (the right end of the second electrode as seen in FIG. 4A ) is measured.
[74]
That is, A1 denotes a distance from the end of the full width of the first electrode 111 provided in the first basic unit to the end of the full width of the second electrode 113 .
[75]
In this case, the first electrode 111 has a smaller area than the second electrode 113 , and thus the position of the second electrode 113 disposed between the separators 112 can be effectively photographed through a perspective view.
[76]
Here, the step (b) further includes a step of determining that the measured A1 is located within the input set value as normal, and determining that the measured A1 is located outside the set value as defective. That is, the step (b) further includes a step of inspecting whether the basic unit is defective, and checks whether a defect is present by checking a stacking error between the first electrode 111 and the second electrode 113 stacked up and down. do.
[77]
More specifically, in step (b), when the measured A1 is located within the input set value, the reference point of the first electrode 111 and the reference point of the second electrode 113 are stacked on the same vertical line. It is determined, and if the measured A1 is located outside the input set value, the reference point of the first electrode 111 and the reference point of the second electrode 113 are not stacked on the same vertical line, and thus it is determined that the stack is defective.
[78]
Meanwhile, step (b) further includes a step of removing the first basic unit 110A from being transferred to the second setting position H2 when it is determined that the first basic unit 110A is defective at the first setting position H1. That is, in step (b), the first basic unit 110A determined to be defective is removed so that the electrode assembly is not manufactured as the defective basic unit.
[79]
On the other hand, the first measuring member 400 is the first electrode 111 full width end and the second electrode 113 full width of the first basic unit 100A transferred to the first set position H1 using a vision alignment inspection machine. Measure the distance (A1) between the ends. Here, the Vision Alignment Inspector uses a camera to measure the quantity, omission, location, shape, dimension, barcode, and external defects of the product by taking an image of the product, and using the captured image, it is difficult to check the difficult precision defects with the human eye. can all be detected.
[80]
Meanwhile, the input setting value may be 1.0 mm or less. That is, when A1 is 1.0 mm or more, there is a possibility that a short circuit may occur due to a lamination defect of the first electrode 111 and the second electrode 113 . Accordingly, in step (b), only the basic unit having an A1 of 1.0 mm or less is transferred to the second setting position H2 to prevent a defective electrode assembly from being manufactured.
[81]
Meanwhile, in the A measurement process, the distance between the full-width end of the first electrode 111 of the second basic unit transferred second to the first set position H1 and the full-width end of the second electrode 113 displayed on the separator 112 . Between (A2) and the full-width end of the first electrode 111 of the n-th basic unit transferred to the n-th basic unit to the first set position H1 and the full-width end of the second electrode 113 displayed on the separator 112 Measure the distance (An) continuously.
[82]
On the other hand, step (b) further includes a D measuring process, wherein the D measuring process is the full length of the first electrode 111 in the image taken by the first measuring member 400, as shown in FIG. 4b. The distance D1 between the full-length end, which is the end in the direction y, and the full-length end, which is the end in the full-length direction (y) of the second electrode 113 is measured.
[83]
That is, D1 denotes a distance from the full-length end of the first electrode 111 to the full-length end of the second electrode 113 .
[84]
Therefore, step (b) is characterized in that it includes a process of determining that the measured A1 and D1 are located within the input set value as normal, and if located outside the measured A1 and D1, it is determined as defective. Due to such a characteristic, it is possible to prevent a defective electrode assembly from being manufactured by checking in advance whether the basic unit is defective.
[85]
In addition, step (b) is characterized in that, if the basic unit is judged to be defective at the first setting position, it further includes a step of removing it so that it is not transferred to the second setting position. Due to such a characteristic, it is possible to prevent stacking of defective basic units.
[86]
Meanwhile, in the D measurement process, the distance between the full-length end of the first electrode 111 of the second basic unit transferred second to the first set position H1 and the full-length end of the second electrode 113 displayed on the separator 112 . Between (D2) and the full-length end of the first electrode 111 of the n-th basic unit transferred to the n-th basic unit to the first set position H1 and the full-length end of the second electrode 113 displayed on the separator 112 The distance (Dn) is continuously measured.
[87]
(c) step
[88]
Step (c) includes a B1 measuring process, and as shown in FIGS. 5 and 6A , when the first basic unit 110A of which A1 is measured is transferred to the second set position H2, , by using the second measuring member 500 to measure the distance B1 from the reference point O of the second set position H2 to the end of the full width of the first electrode 111 of the first basic unit 110A.
[89]
In this case, the step (c) further includes a step of checking whether the reference point O of the second installation position H2 matches the reference point of the first basic unit 110A, as shown in FIGS. 7 and 8 . do. That is, in step (c), if the reference point O of the second installation position H2 coincides with the reference point Oa of the first basic unit 110A, it is determined as normal, and the reference point of the second installation position H2 ( O) and the reference point Oa of the first basic unit 110A do not match, it is determined as defective. In particular, in step (c), if the reference point O of the second installation position H2 and the reference point Oa of the first basic unit 110A do not match, the first basic unit 110A is moved using the transfer member 300 . It moves by the error value between the reference point O of the second installation position H2 and the reference point Oa of the first basic unit 110A, and accordingly, the first basic unit is moved to the reference point O of the second installation position H2. Match the reference point Oa of (110A).
[90]
On the other hand, the reference point Oa of the first basic unit 110A may be a point at which a line correspondingly equal to the first basic unit 110A in the full width direction (x) and a line correspondingly equal in the full length direction (y) intersect the first basic unit 110A. have. Accordingly, the measured value of the basic unit transferred to the second installation position H2 can be uniformly measured. Of course, the reference line of the first and second electrodes 111 and 113 may be an equal line corresponding to the first and second electrodes 111 and 113 in the width direction.
[91]
Meanwhile, step (c) includes a process of measuring E1, in which, as shown in FIGS. 5 and 6B , the first basic unit 110A from which D1 is measured is located at the second set position H2. When transferred, the distance E1 is measured from the reference point O of the second setting position H2 to the full length end of the first electrode 111 of the first basic unit 110A by using the second measuring member 500 .
[92]
(d) step
[93]
In step (d), as shown in FIG. 9, the second basic unit is transferred to the second set position (H2) through the first set position (H1) on top of the first base unit 110A, where B1 is measured ( 110B) is laminated. Accordingly, a laminate in which the second basic unit 110B and the first basic unit 110A are vertically disposed at the second set position H2 may be manufactured.
[94]
At this time, the second basic unit 110B includes the full-width end of the first electrode 111 (the right end of the first electrode as viewed in FIG. 10A ) and the second The distance A2 between the full-width ends of the electrodes 113 (the right ends of the second electrode as seen in FIG. 10A ) is measured.
[95]
In addition, in the second basic unit 110B, the distance D2 between the full-length end of the first electrode 111 and the full-length end of the second electrode 113 at the first set position H1 is measured.
[96]
(e) step
[97]
Step (e) includes a process for measuring B2, wherein the process for measuring B2 is, as shown in FIG. 10A, a first electrode ( 111) the distance to the end of the full width (B2)measure
[98]
On the other hand, step (e) includes a process of measuring E2, and as shown in FIG. 10B , the process of measuring E2 is the first of the second basic unit 100B from the reference point O of the second set position H2. Measure the distance E2 to the end of the electrode 111 full length.
[99]
(f) step
[100]
Step (f) includes a C1 measurement process, wherein the C1 measurement process adds B2 and A2 of the second basic unit 110B, and then subtracts B1 of the first basic unit 110A to obtain the first electrode of the first basic unit 110A. (111) A distance C1 between the end of the full width and the end of the full width of the second electrode 113 of the second basic unit 110B is measured.
[101]
That is, the formula of B2+A2-B1=C1 can be obtained.
[102]
On the other hand, step (f) includes the F1 measurement process, and the F1 measurement process adds E2 and D2 of the second basic unit 110B, and then subtracts E1 of the first basic unit 110A to obtain the first basic unit 110A. The distance F1 between the full-length end of the first electrode 111 and the full-length end of the second electrode 113 of the second basic unit 110B is measured.
[103]
That is, the formula of E2+D2-E1=F1 can be obtained.
[104]
(g) step
[105]
Step (g) includes a full-width inspection step of inspecting alignment in the full width direction (x) of the first basic unit and the second basic unit. If it is located within the input error value, it is determined as normal lamination, and if it is located outside the input error value, it is determined as defective lamination. Here, the error value may be 0.1 to 2 mm.
[106]
That is, in the full-width inspection process of step (g), if the C1 and A1 of the first basic unit 110A are located within the error value, the full-width end of the first electrode 111 of the first basic unit 110A and the second basic unit 110B) The full-width end of the second electrode 113 is located on the same vertical line, and thus it is determined as a normal stacking. And when C1 and A1 of the first basic unit 110A are located outside the error value, the full width end of the first electrode 111 of the first basic unit 110A and the full width end of the second electrode 113 of the second basic unit 110B are located outside the error value. It is judged to be defective as it is greatly separated.
[107]
On the other hand, in the full-width inspection process of step (g), if C1 and A1 of the first basic unit 110A are different, the second basic unit 110B is positioned by the error value of C1 and A1 of the first basic unit 110A , and thus the stacking alignment degree of the first basic unit 110A and the second basic unit 110B in the full width direction may be increased.
[108]
Meanwhile, step (g) includes a full-length inspection step of inspecting the alignment of the first basic unit and the second basic unit in the full-length direction (y), and the full-length inspection step is performed by comparing F1 and D1 of the first basic unit 110A. After that, if it is located within the input error value, it is determined as normal lamination, and if it is located outside the input error value, it is determined as defective lamination.
[109]
That is, in the full-length inspection process of step (g), if the F1 and D1 of the first basic unit 110A are located within the error value, the full-length end of the first electrode 111 of the first basic unit 110A and the second basic unit 110B) The full-length end of the second electrode 113 is located on the same vertical line, and thus it is determined as a normal stacking. And when F1 and D1 of the first basic unit 110A are located outside the error value, the full-length end of the first electrode 111 of the first basic unit 110A and the full-length end of the second electrode 113 of the second basic unit 110B are located outside the error value. It is judged to be defective as it is greatly separated.
[110]
On the other hand, the full-length inspection process in step (g) includes a step of adjusting the position of the second basic unit 110B by the error value of F1 and D1 if D1 of the first basic unit 110A is different from F1, Accordingly, the stacking alignment degree of the first basic unit 110A and the second basic unit 110B in the longitudinal direction y may be increased.
[111]
On the other hand, the step (g) further includes a step of bonding the first basic unit 110A and the second basic unit 110B if it is determined that the stacking is normal in the full-width inspection process and the full-length inspection process, thereby preventing the occurrence of meandering defects. prevent.
[112]
Here, the bonding force between the first basic unit 110A and the second basic unit 110B is weaker than the bonding strength between the electrode and the separator provided in the first basic unit 110A and the second basic unit 110B. Accordingly, even when the first basic unit 110A and the second basic unit 110B are separated, the separation of the electrode and the separator provided in the first basic unit 110A and the second basic unit 110B can be prevented.
[113]
Meanwhile, after the step (g), the steps (h), (i), (j) and (k) may be further included.
[114]
(h) step
[115]
In step (h), after step (g), the n-th basic unit 110N transferred to the second setting position H2 through the first setting position H1 is stacked on top of the second basic unit 110B. .
[116]
At this time, the n-th basic unit 110N includes the full-width end of the first electrode 111 provided in the n-th basic unit 100N at the first setting position H1 (the right end of the first electrode as seen in FIG. 11A ) and A distance An is measured between the ends of the full width of the second electrode 113 (the right end of the second electrode when viewed in FIG. 11A ).
[117]
Also, in step (h), the full-length end (the right end of the first electrode as seen in FIG. 11B ) and the second electrode provided in the n-th basic unit 100N at the first setting position H1 The distance Dn between the full-length ends of (113) (the right end of the second electrode as seen in FIG. 11B) is measured.
[118]
(i) step
[119]
Step (i) includes a Bn measuring process. Referring to FIG. 11A , the Bn measuring process is at the end of the first electrode 111 of the nth basic unit 110N from the reference point O of the second set position H2. Measure the distance (Bn) to
[120]
In addition, step (i) includes an En measuring process, and referring to FIG. 11B , the first electrode 111 of the nth basic unit 110N from the reference point O of the second set position H2. Measure the distance (En) to the end.
[121]
(j) step
[122]
Step (j) includes a Cn measuring process, wherein the Cn measuring process adds Bn and An of the nth base unit 110N, then subtracts B2 of the second base unit 110B to obtain the first base unit of the second base unit 110B. The distance Cn between the end of the full width of the electrode 111 and the end of the full width of the second electrode 113 of the n-th basic unit 110N is measured.
[123]
That is, the formula of Bn+An-B2=Cn can be obtained.
[124]
Also, step (j) includes the Fn measurement process, in which the Fn measurement process adds En and Dn of the nth basic unit 110N, and then subtracts E2 of the second basic unit 110B to obtain the second basic unit 110B. The distance Fn between the full-length end of the first electrode 111 and the full-length end of the second electrode 113 of the n-th basic unit 110N is measured.
[125]
That is, the formula of En+Dn-E2=Fn can be obtained.
[126]
(k) step
[127]
Step (k) includes a full-width inspection step of inspecting the alignment of the second basic unit and the n-th basic unit in the full width direction. If it is located within the specified error value, it is judged as normal lamination, and if it is located outside, it is judged as defective lamination. On the other hand, the criterion for judging normal or bad is the same as in step (g) described above.
[128]
In addition, step (k) includes a full-length inspection step of checking the alignment of the second basic unit and the n-th basic unit in the full-length direction, and the full-length inspection step is performed after preparing Fn and D2 of the second basic unit 110B. , if it is located within the input error value, it is determined as normal lamination, and if it is located outside the input error value, it is determined as defective lamination. On the other hand, the criterion for judging normal or bad is the same as in step (g) described above.
[129]
Therefore, in the electrode assembly manufacturing method according to the first embodiment of the present invention, the electrode assembly 100 having an increased stacking alignment degree can be manufactured by stacking the plurality of basic units 110 in the vertical direction as described above.
[130]
Hereinafter, in describing another embodiment of the present invention, the same reference numerals are used for the components and methods having the same functions and methods as those of the above-described embodiment, and the overlapping description will be omitted.
[131]
[Method for manufacturing secondary battery according to the second embodiment of the present invention]
[132]
As shown in FIG. 12, the secondary battery manufacturing method according to the second embodiment of the present invention includes (A) manufacturing an electrode assembly 100, and (B) attaching the electrode assembly 100 to a battery case ( 120), and injecting an electrolyte into the battery case 120 to manufacture the secondary battery 10.
[133]
Here, step (A) is the same as the method for manufacturing the electrode assembly according to the first embodiment described above, and thus overlapping description will be omitted.
[134]
Therefore, in the secondary battery manufacturing method according to the second embodiment of the present invention, the occurrence of defects can be greatly reduced, and the marketability can be increased by manufacturing the secondary battery 10 including the electrode assembly 100 having an increased alignment.
[135]
The scope of the present invention is indicated by the following claims rather than the above detailed description, and various embodiments derived from the meaning and scope of the claims and their equivalent concepts are possible.
[136]
[Explanation of code]
[137]
100: electrode assembly
[138]
110: basic unit
[139]
120: battery case

Claims

[Claim 1]
(a) transferring a plurality of basic units in which a first electrode, a separator, a second electrode and a separator are sequentially stacked from a first set position to a second set position; (b) The basic unit is photographed at the first set position, and the distance between the full-width end, which is the end in the full-width direction of the first electrode, and the full-width end, which is the end in the full-width direction of the second electrode provided in the first photographed primitive (A1) ), the second base filmedThe distance (A2) between the full width end, which is the end in the full width direction of the first electrode provided in the unit, and the full width end, which is the end in the full width direction of the second electrode, in the full width direction of the first electrode provided in the photographed nth basic unit A step of measuring the distance (An) between the full-width end, which is the end, and the full-width end, which is the end in the full width direction of the second electrode; (c) When the first basic unit whose A1 is measured is transferred to the second setting position, the B1 measurement process of measuring the distance (B1) from the reference point (O) of the second setting position to the end of the full width of the first electrode of the first basic unit is performed. providing; (d) stacking a second basic unit transferred to a second setting position through the first setting position on top of the first basic unit; (e) providing a B2 measurement step of measuring a distance (B2) from the reference point (O) of the second set position to the end of the full width of the first electrode of the second basic unit; (f) adding B2 and A2 and then subtracting B1 to measure the distance (C1) between the end of the full width of the first electrode of the first basic unit and the end of the full width of the second electrode of the second base unit; And (g) after comparing the C1 and A1, if located within the input error value is determined to be a normal stacking, if located outside the electrode assembly manufacturing method comprising the step of having a full-width inspection step of determining that the stacking is defective.
[Claim 2]
The method according to claim 1, wherein the step (b) further comprises a step of determining that A1 measured in the A measurement process is located within the input set value, judging it as normal, and judging it as defective if it is located outside the A1 measurement process.
[Claim 3]
The method according to claim 2, wherein the step (b) further comprises a step of removing the basic unit so as not to be transferred to the second setting position when it is determined that the basic unit is defective at the first setting position.
[Claim 4]
The method according to claim 1, wherein in step (b), the distance between the full width end of the first electrode and the full width end of the second electrode of the basic unit is measured at the first set position using a vision alignment tester.
[Claim 5]
The method according to claim 1, wherein step (c) further comprises the step of checking whether the reference point (O) of the second installation position matches the reference point of the basic unit, wherein the reference point of the basic unit is in the full width direction of the basic unit. A method for manufacturing an electrode assembly, which is a point at which a correspondingly equal line and a correspondingly equal line in the direction of the electric length intersect.
[Claim 6]
The method according to claim 5, wherein in step (c), if the reference point (O) of the second installation position and the reference point of the basic unit do not match, the basic unit is moved to match the reference point (O) of the second installation position and the reference point of the basic unit An electrode assembly manufacturing method further comprising the step of:
[Claim 7]
The electrode assembly of claim 1 , wherein the step (g) further comprises a step of adjusting the position of the second basic unit by a difference value compared to the C1 and A1 of the first basic unit, if it is determined that the stacking is defective in the full-width inspection process. manufacturing method.
[Claim 8]
The method according to claim 1, wherein in step (a), the first electrode has a smaller area than the second electrode.
[Claim 9]
The method according to claim 1, wherein the step (g) further comprises a step of bonding the first basic unit and the second basic unit when it is determined that the normal stacking is performed.
[Claim 10]
The method according to claim 1, further comprising the steps of: (h) stacking an n-th basic unit transferred to a second setting position through a first setting position on top of the second basic unit after step (g); (i) providing a Bn measuring step of measuring a full width distance (Bn) from a reference point (O) of a second set position to the end of the first electrode full width of the n-th basic unit; (j) Measure the distance (Cn) between the end of the full width of the first electrode of the second base unit and the end of the full width of the second electrode of the nth base unit by adding Bn and An of the nth base unit and then subtracting B2 of the second base unit providing a Cn measurement process; and (k) comparing the Cn with A2 of the second basic unit, and determining that the stacking is normal if it is located within the input error value, and judging that the stack is defective if it is located outside the input error value.
[Claim 11]
The method according to claim 10, wherein in step (b), the distance (D1) between the full-length end of the first electrode provided in the photographed first basic unit and the full-length end of the second electrode in the full-length direction, The distance (D2) between the full-length end of the first electrode provided in the photographed second basic unit and the full-length end of the second electrode in the full-length direction, the first electrode provided in the photographed nth basic unit Further comprising a D measurement step of measuring a distance (Dn) between the full-length end, which is the end in the full-length direction of The method further includes an E1 measuring step of measuring a distance (E1) from the reference point (O) of the second set position to the full-length end of the first electrode of the first basic unit when transferred to the set position, wherein step (e) includes: and measuring the distance (E2) from the reference point (O) of the set position to the full-length end of the first electrode of the second basic unit, wherein the step (f) includes adding E2 and D2 of the second basic unit and then , F1 measuring step of measuring the distance (F1) between the full-length end of the first electrode of the first basic unit and the full-length end of the second electrode of the second basic unit by subtracting E1, wherein step (g) comprises: After preparing D1 of the first basic unit, if it is located within the input error value, it is determined that the stack is normal, and when it is located outside, it is determined that the stack is defective.
[Claim 12]
The method according to claim 11, wherein the step (g) further comprises a step of adjusting the position of the second basic unit by a difference between the F1 and D1 of the first basic unit when it is determined that the stacking is defective in the electric field inspection process. A method for manufacturing an electrode assembly.
[Claim 13]
The method according to claim 11, wherein the step (i) further comprises a En measuring step of measuring a distance (En) from the reference point (O) of the second set position to the full-length end of the first electrode of the n-th basic unit, wherein (j) Step ) is to measure the distance (Fn) between the full length end of the first electrode of the second base unit and the full length end of the second electrode of the nth base unit by adding En and Dn of the nth base unit and then subtracting D2 of the second base unit. and, in step (k), after comparing the Fn with D2 of the second basic unit, if it is located within the input error value, it is determined as a normal stack, and if it is located outside, it is determined as a bad stack. An electrode assembly manufacturing method further comprising a.
[Claim 14]
(A) manufacturing an electrode assembly according to claim 1; and (B) accommodating the electrode assembly in a battery case, and manufacturing a secondary battery by injecting an electrolyte into the battery case.
[Claim 15]
An apparatus for manufacturing an electrode assembly, comprising: a loading box in which a plurality of basic units in which a first electrode, a separator, a second electrode, and a separator are sequentially stacked are stacked in a vertical direction; Transfer of transferring the uppermost basic unit among the basic units loaded in the loading box to the first setting position (H1), and then transferring the basic unit at the first setting position (H1) to the second setting position (H2) absence; The distance A1 from the tip of the first electrode provided in the first transferred basic unit at the first set position H1 to the end of the second electrode, and the end of the first electrode provided in the second transferred basic unit a first measuring member for measuring the distance (A2) from the to the end of the second electrode; and measure the first transferred basic unit transferred to the second set position H2, but measure the distance B1 from the reference point O of the second set position H2 to the end of the first electrode of the first transferred basic unit and measure the distance (B2) from the reference point (O) of the second set position (H2) to the tip of the first electrode of the second transferred basic unit stacked on the upper side of the first transferred basic unit, and After adding B2 and A2, subtract B1 of the first transferred basic unit to measure the distance (C1) between the first electrode end of the first transferred basic unit and the second electrode end of the second transferred basic unit, and the C1 and An electrode assembly manufacturing apparatus comprising: a second measuring member for determining normal stacking when the difference value compared to A1 of the first transferred basic unit is located within the input error value;