1]Mutual citations and related applications
[2]This application claims the benefit of priority based on the April 14, Korea Patent Application No. 10-2017-0048645 and 04 years May 13, 2018 Date of Korea Application No. 10-2018-0043191 No. 2017, the literature of the Korea Patent Application all the disclosure in which is incorporated as a part hereof.
[3]Art
[4]The present invention relates to a method of manufacturing a secondary battery, and as it relates to a process for the preparation of a secondary battery, the secondary battery that can increase the mechanical strength of the electrode tab, and more particularly the secondary cell.
BACKGROUND
[5]
To generate electrical energy through a physical reaction or chemical reaction of the material cell is to supply power to an external (cell, battery), according to the living environment surrounded by various types of electrical and electronic devices, fail to obtain the AC power supplied to the building If you will be using, if necessary, or DC power.
[6]
In such cells there from chemical reaction cell of a primary cell and a secondary battery using a commonly widely used, the primary cell is a consumable battery to be collectively referred to as batteries. Further, the secondary battery when the oxidation-reduction process between the current and the material number repeatable as a rechargeable battery which is made using a material, the reduction for the material carried by the current power is being filled, the oxidation of the material When the power is performed there is a discharge, this charge-discharge is repeatedly performed while electricity is generated is presented.
[7]
On the other hand, the secondary battery of lithium ion battery has a plurality of times in the form of a cylinder naejineun approximately jelly roll (jelly roll) to ensure that there is interposed a separator between the positive electrode conductive foil and each coated with the active material at a predetermined thickness on the cathode conductive foil, wherein the amount of the conductive foil, Issues accommodating an electrode assembly produced by taking a cylindrical or rectangular can, a pouch or the like and is produced by the sealing process it.
[8]
Republic of Korea Laid-Open Patent Publication No. 10-2012-0006389 discloses a secondary battery comprising an electrode assembly of the prior art and it is disclosed.
[9]
Conventional secondary battery has a technology applied to a low-resistance metal in the negative electrode tab, or increasing the number of electrode tabs is required to the low-resistance cell development.
[10]
The cathode developed by this need, multi-tap structure was 3 tap structure of attaching the electrode tab to the second tab structure or core and the outer part for attaching each of the electrode tabs in the core and the outer middle is attached to the tab in the middle side.
[11]
However, there was a problem of battery capacity decrease according to the increasing solid portion to be formed in the solid parts of the intermediate electrodes a predetermined position to the jelly roll nature middle attachment tab.
Detailed Description of the Invention
SUMMARY
[12]
Therefore, the present invention is conceived to solve the above problem, the object of the present invention is to provide a method of manufacturing a secondary battery and a secondary battery that is capable of forming a multi-tap, with minimal parts of solid.
[13]
Further, the object of the present invention is to provide a method of manufacturing a furnace referred to as a secondary battery that can increase the mechanical strength, forming the electrode tab, and a secondary battery, an electrode foil.
Problem solving means
[14]
A secondary battery according to an embodiment of the present invention includes electrode collector-like holding the active material is applied to the portion and the electrode collector a portion solid non-active material is applied to the electrode provided in the longitudinal direction of the whole of the current collector and the group extends not in the lateral direction of the current collector from the holding portion not coating the said active material, characterized in that it includes a notched tab on which the electrode is wound when the overlap of two or more layers formed.
[15]
Notching the tab portion can extend to be continuous from the more than one-third of the total length holding unit.
[16]
Notching is cutting the tab portion in the electrode is wound to form a plurality of furnace chingtaep.
[17]
The width of the furnace chingtaep may be 4mm ~ 5mm.
[18]
The electrode member is accommodated in the can, the furnace chingtaep can be bent is connected to the can member.
[19]
Formed by the bending furnace chingtaep the bent portion may be joined to the can member.
[20]
It may include an insulation member formed between said bent portion and the end portion of the electrode.
[21]
It may include an electrode tab attached to the uncoated portion.
[22]
The electrode wherein the notched tab portion is notched to form a plurality of furnace chingtaep, in the electrode is wound may be accommodated in the can member, and the plurality of furnace chingtaep is connected is bent to overlap the electrode tab.
[23]
The electrode tabs and the electrode tabs and the plurality of furnace chingtaep connected overlap may together be joined to the can member.
[24]
Notching length of the plurality of no-chingtaep may be 8mm ~ 11mm.
[25]
Notching length of the plurality of no-chingtaep may be 9mm ~ 10mm.
[26]
The electrode may be a cathode.
[27]
Manufacturing method of a secondary battery according to an embodiment of the present invention includes preparing step of preparing an electrode provided along the length of the whole of the current collector parts plain unpainted the holding portion and the active material of the active material onto the current collector coated , the electrode tab portion formed notching step called the no-electrode, the additional notching tab formed such that the notched tab portion is formed extending over the length of one-third holding portion in the electrode in the absence of the active material in the width direction of the whole of the current collector separator and the electrode and sanggeuk is then laminated to the other electrode volume take-up step hyeongseongneun the electrode assembly taken, no chingtaep forming step and the can member to the electrode assembly to form a plurality of furnace chingtaep by cutting parts of the notched tab from the electrode assembly to accommodate the installation comprises a step of bonding the chingtaep the furnace to the can member.
[28]
The electrode of the cathode in the above preparation steps can be prepared.
[29]
The preparation step may be arranged in parallel relative to the width direction of the entire solid parts of the current collector is not coated with the active material holding portion of the active material onto the current collector is applied.
[30]
The notched tab portion forming step may be referred to parts of the cutting and with the said holding part and the longitudinal direction of the solid parts of the entire current collector arranged parallel to the non-active material is applied to the holding portion in the width direction notching tap furnace.
[31]
Notching step to form the tab portion may also refer to the furnace so as to form a cutting, while the electrode tabs are not added the notching active material is applied to the holding portion in the width direction.
[32]
In the furnace chingtaep forming step can be cut by the notching tab parts of the laser.
[33]
The installation step may be joined to the bent from the furnace chingtaep part to receive the electrode assembly in a can member in a state in which the bending furnace chingtaep to the can member.
[34]
In the installation step it may be bonded to the can member by the bent portion of the furnace chingtaep welding.
[35]
To overlap each other to the bent portion of the plurality of the furnace chingtaep in the installation steps may be bonded at the same time to the can member.
[36]
The winding step can be formed so as to overlap with the notched tab portion more than two layers.
Effects of the Invention
[37]
According to the invention, this has the effect of forming a multi-tap, while minimizing the coated portion is formed.
[38]
According to the invention, to form a multi-tap it is effective to minimize the electrical resistance.
[39]
In accordance with the present invention, there is an effect to ensure the battery capacity by minimizing the coated portion is formed.
[40]
In accordance with the present invention, there is an effect, forming a foil tap of the furnace chingtaep from the electrode foil to increase the mechanical strength to be chingtaep no overlap of two or more layers.
[41]
According to the invention, to enhance the mechanical strength of the furnace chingtaep foil tab furnace chingtaep the furnace can be joined to the can members in a bent state chingtaep as not be cut off in the bent state, while ensuring the reliability of the electrically connected coupling force the increase is effective.
[42]
According to the invention, it can be joined to the can member chingtaep the furnace and the electrode tab at the same time has the effect of securing the welding of fairness.
[43]
According to the invention, to prevent contact of the furnace chingtaep the electrode assembly to improve safety, as to form a plurality of furnace chingtaep the outside of the electrode assembly be able to install the insulating member between the ends of the plurality of no-chingtaep and electrode assembly there is an effect.
Brief Description of the Drawings
[44]
1 is a developed view showing the deployment in the electrode according to an embodiment of the invention state.
[45]
2 is a perspective view showing a state where the take-up of Figure 1;
[46]
3 is a perspective view showing that the formation of the furnace chingtaep by notching parts of the cutting tabs in FIG.
[47]
Figure 4 is a perspective showing in a can member in installing an electrode assembly in accordance with one embodiment of the present invention to the can member state perspective oblique view.
[48]
Figure 5 is a bottom view showing the bottom surface in only the electrode assembly in FIG.
[49]
6 is a flow chart sequentially showing a method of manufacturing a secondary battery according to an embodiment of the present invention.
[50]
7 is a plan view showing that an array in parallel relative to the holding portion and the solid portion in the width direction of the current collector is formed by the longitudinal direction of the current collector in accordance with an embodiment of the invention.
[51]
8 is a bottom view shown in the figures that are joined to the furnace chingtaep and the electrode tab in accordance with another embodiment of the invention.
[52]
Figure 9 is a side view of the Figure 8 from the side.
Best Mode for Carrying Out the Invention
[53]
Will be described in detail a manufacturing method of a secondary battery and a secondary battery according to a preferred embodiment that follows, the present invention will be described with reference to the accompanying drawings.
[54]
Herein and in the terms or words used in the claims is general and not be construed as limited to the dictionary meanings are not, the inventor can adequately define terms to describe his own invention in the best way on the basis of the principle that the interpreted based on the meanings and concepts corresponding to technical aspects of the present invention. Accordingly, the configuration shown in the examples and figures disclosed herein are in not intended to limit the scope of the present is merely a preferable embodiment of the present invention invention, a variety that can be made thereto according to the present application point it should be understood that there may be equivalents.
[55]
Size of the particular portion to be combined with each component or components in the drawings are exaggerated, omitted for the purpose of convenience or clarity, or was schematically illustrated. Therefore, the size of elements does not utterly reflect an actual size. If a detailed description of known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention, such explanation will be omitted.
[56]
[57]
1 is a developed view showing the electrode in a deployed according to an embodiment of the present invention condition, Figure 2 is a perspective view showing a state where the take-up of Figure 1;
[58]
As shown in Figure 1 to Figure 2, the secondary battery according to an embodiment of the invention the active material on the entire are applied holding part 110 and the current collector electrode active material (a) on the current collector (a) the non-coated plain section 120 to the current collector electrode of its length provided along the direction 100 and the whole of the current collector width direction extends prevent this the active material is applied from the holding portion 110, When the electrode 100 is wound and a notched tab portion 111 is formed overlap of two or more layers (also it is shown a notched tab portion (111) overlapping the two layers in Figure 2.)
[59]
Forming a foil tab, the notched tab from the current collector foil of the electrode while it is possible to increase the mechanical strength to be foil tabs overlap at least two layers.
[60]
Electrode 100 can be any one of a cathode with the cathode active material is coated with the positive electrode and the negative electrode active material is applied, the separator is interposed a plurality of times stacking a positive electrode, a negative electrode and a separator that are interposed between an anode and a cathode of the electrode assembly (1) It can be prepared.
[61]
And an electrode assembly (1) may be produced by winding a laminated body by laminating the positive electrode and the separator and the negative electrode in a jelly roll form.
[62]
The positive electrode may include aluminum electrode collector may be, as the cathode active material coated with the positive electrode holding part, that is the positive electrode uncoated positive electrode active material is not coated parts.
[63]
The positive electrode active material is LiCoO 2 , LiNiO 2 , LiMnO 2 , LiMnO 4 may be a lithium-containing chalcogenides or lithium transition metal oxide compound such as a knife.
[64]
Positive electrode holding portion, for example, an aluminum current collector, and a part of the entire at least one surface of the formed by coating a positive electrode active material, a positive electrode active material uncoated with the remainder of the total aluminum current collector may be added to positive electrode uncoated.
[65]
The cathode may be a copper current collector, a negative electrode active material is applied to the cathode holder and the cathode active material, negative electrode uncoated unpainted may include a.
[66]
Negative electrode active material, may be a crystalline carbon, amorphous carbon, carbon composite material, carbon materials such as carbon fiber, lithium metal or a lithium alloy.
[67]
Negative electrode holding portion, for example, and formed by coating a negative electrode active material on a portion of at least one surface of a copper current collector, a negative electrode active material a non-rest of the whole coated copper current collector could be negative electrode uncoated portion.
[68]
Membrane, for example, polyethylene (PE), polystyrene (PS), polypropylene (PP) and polyethylene (PE) and polypropylene (PP) copolymer either one of the base material is selected from the group consisting of (co-polymer) of the polyvinylidene fluoride flows can be prepared by coating the flow hexafluoro propylene copolymer (PVDF-HFP co-polymer).
[69]
Thus, the electrode 100 of the present invention may be at least one of a positive electrode, a negative electrode to form the electrode assembly 1, can in particular the resistance decreases more any need in the positive or negative electrode.
[70]
According to the present invention will be described the negative electrode in one embodiment.
[71]
Electrode 100 is one and the uncoated portion 120, the portion can be formed, in the coated portion 120 is formed on one end portion of the electrode 100 can be attached to an electrode tab 121. The
[72]
Notched tab portion 111 may be formed as the notching (notching) the electrode 100 so as to extend in the width direction from the holding portion 110 of the electrode 100, holding portion 110 is the total length of the electrode 100 in the area corresponding to more than a third collector electrode it is formed so as to extend only active material (a) of may not be applied.
[73]
These notched tab portion 111 is the active material (a) in the holding section 110, the area of ​​the holding unit may 110 be formed by removing only the active material (a) in, or electrode 100 extends from the electrode 100 is It may be formed to extend man chae electrode foil that is not coated.
[74]
Therefore, there may be an effect of forming a multi-tap, while minimizing the coated portion is formed, it is possible to ensure the battery capacity by minimizing the coated portion is formed.
[75]
3 is a perspective view showing that the formation of the furnace chingtaep by notching parts of the cutting tabs in FIG.
[76]
, The notched tab portion 111 as shown in Figure 3 is cut from a wound state can be formed in a plurality of furnace chingtaep (111a). Resistance of the electrode increases, the number of tabs of the furnace chingtaep (111a) is reduced.
[77]
At this time, the width of a furnace chingtaep (111a) is good to form a 4mm ~ 5mm, for this reason has a width of no chingtaep (111a) may be weak is less than 4mm mechanical strength, the width of the furnace chingtaep (111a) If more than 5mm in the process of bonding for electrical connection between the members can be difficult because the modification.
[78]
Foil tap of the furnace to enhance the mechanical strength of the chingtaep (111a) no chingtaep (111a) can be joined to the can member in the one bending furnace chingtaep (111a) as not be cut off in the bent state condition got reliability of electrical connection the bonding strength can be improved while securing.
[79]
4 is a perspective view of the perspective shown in perspective a can member in installing an electrode assembly in accordance with one embodiment of the present invention to the can member, Figure 5 is a bottom view showing the bottom surface in only the electrode assembly in FIG.
[80]
As Figure 4 and shown in Figure 5, the electrode assembly (1) according to the secondary battery of the present invention are electrically and furnace chingtaep (111a) one state to the can member 10 is bent to and accommodated in the can member 10 connection so that it is possible to bond the bent part of the no-welding chingtaep (111a) to the can member 10.
[81]
No chingtaep (111a) bent in the furnace a plurality of furnace chingtaep (111a) and to facilitate the electrical connection to be coupled to a bottom center of the chingtaep (111a), the can member 10, the ends of this electrically connected to minimize the electrical resistance can do.
[82]
Figure 8 is a bottom view shown in the figures that are joined to the furnace chingtaep and the electrode tab in accordance with another embodiment of the invention, Figure 9 is a side view of the Figure 8 from the side.
[83]
The secondary battery according to another embodiment of the present invention includes a plurality of furnace chingtaep (111a) notched tab portion 111 on the electrode assembly 1, the electrode 100 is wound is cut as shown in Figs. 8 and 9 the formation, and the plurality of furnace chingtaep (111a) is bent can be connected to overlap the electrode tab 121 is formed at the end center portion of the electrode assembly (1).
[84]
And the electrode assembly 1 is accommodated in the can member 10, the electrode tabs 121 and the plurality of furnace be connected overlap chingtaep (111a), the electrode tabs 121 and joined by welding or the like to the can member 10 with It can be.
[85]
Secure welding fairness because the weld joint with the other embodiment the secondary battery according to the example is a plurality of furnace chingtaep (111a) and the electrode tab can member in a state 121, the connection overlap each other (10) of the present invention as described above, that can be easy.
[86]
When the secondary battery according to another embodiment of the invention the length of the diameter of the end portion of the electrode assembly (1) 16mm ~ 21mm, a length of notching a plurality of furnace chingtaep (111a) be in the range of 8mm ~ 11mm. The reason for this is that the notching length of the furnace chingtaep (111a) is shorter, the length of the furnace chingtaep (111a) is 8mm under no chingtaep (111a) is bent being superimposed on the electrode tab 121 is formed at the end center portion of the electrode assembly (1) It can be difficult. In addition, the furnace is notching a length of the space becomes longer or more if necessary, the length of the furnace chingtaep (111a) exceeds 11mm cost increase with no chingtaep (111a) due to material waste share of the can member 10 of chingtaep (111a) It may be the amount of the more becomes filled in the can member 10, the electrolytic solution may cause deterioration of the capacity according to juleodeum. Preferably no notching length chingtaep (111a) is preferably a 9mm ~ 10mm.
[87]
A secondary battery according to another embodiment of the present invention may form an insulating member 130 between the end of the furnace chingtaep (111a), the bent portion and the electrode the electrode assembly (1) 100 of the take-up.
[88]
The insulating member 130 may be the insulation between the end portion and the furnace chingtaep (111a) and the electrode assembly (1) to prevent contact between the furnace chingtaep (111a) and the electrode assembly (1).
[89]
A plurality of furnace chingtaep (111a) can not interfere with the installation the ends are formed on the outer frame section insulating member 130 of the electrode assembly (1) to the end portion of the electrode assembly (1).
[90]
As the plurality of furnace chingtaep (111a) to be able to install the insulating member 130 between the ends of the plurality of no-chingtaep (111a) and the electrode assembly 1 is formed in the outside of the electrode assembly no chingtaep (111a) and the electrode it is possible to prevent contact of the assembly 1 to improve the safety.
[91]
[92]
It will be described in detail a method for manufacturing a secondary battery according to the embodiment of the present invention with reference to the drawings one example.
[93]
6 is a flow chart sequentially showing a method of manufacturing a secondary battery according to an embodiment of the present invention.
[94]
6, the manufacturing method of a secondary battery according to one embodiment of the present invention, the preparation phase (S1), notched tab portion forming step (S2), the winding step (S3), the furnace chingtaep forming step (S4), and It includes an installation step (S5).
[95]
The preparation step (S1) is an electrode provided along the length of the whole of the current collector electrode active material (a) is applied to the holding portion 110 and the electrode active material (a) coated portion is not coated (120) on the current collector a step of preparing a (100).
[96]
At this time, the electrode 100 may be a cathode.
[97]
7 is a plan view showing that an array in parallel relative to the holding portion and the solid portion in the width direction of the current collector is formed by the longitudinal direction of the current collector in accordance with an embodiment of the invention.
[98]
As shown in Figure 7, the preparation stage holding formed of a (S1) relative to the longitudinal direction (L) of the current collector in the unit 110 and the uncoated portion 120 is relative to the width direction (W) of the current collector as it can be arranged in parallel.
[99]
The notched tab portion forming step (S2) is a notched tab portion (111) extending in the absence of the active material in the width direction (W) of the holding section 110 more than one-third the length of the holding portion 110 in the electrode 100 the step is called the no-electrode 100 to be formed.
[100]
In this way it is in the electrode 100 is referred rowing notched tab portion 111 formed in the width direction (W) of the holding part 110, while cutting the electrode 100 from the current collector electrode active material (a) is not coated solid portion referred furnace part may be to form a notched tab portion (11).
[101]
In addition, the electrode collector maintain formed based on the longitudinal direction (L) of the portion 100 and the uncoated portion 120 is arranged in parallel to maintain if arranged in parallel relative to the width direction (W) of the current collector part between 110 and uncoated portion 120, one of the holding and cutting in the longitudinal direction (L) of the current collector part 110 and the width direction (W) of the other holding portion (110a) of the array as a reference in parallel the active material formed in the furnace referred to the non-coated portion coated region can be such that the notched tab portion 111 is formed in the width direction (W) of the holding portion 110. the
[102]
The take-up step (S3) may be a step of forming an electrode assembly (1) by winding after notching tab portion 111 is laminated to the electrode 100 is formed on the other electrode or a separator and the electrodes 100 and sanggeuk.
[103]
Notched tab portion in the course of the electrode 100, the winding 111 may be formed to be overlapped in two or more layers.
[104]
The furnace chingtaep forming step (S4) may be a step of forming a plurality of furnace chingtaep (111a) by cutting the notched tab portion 111 in the electrode assembly (1).
[105]
No chingtaep notched tab portion 111 is formed of a cutting (111a) may be formed in the same manner overlapped in two layers or more health and notched tab portion (111).
[106]
The cutting of the notched tab portion 111 is to maximize operating efficiency by means of a laser.
[107]
The installation step (S5) is a step for receiving the electrode assembly (1) to the can member 10 by bonding a furnace chingtaep (111a) to the can member 10.
[108]
Installing step (S5) No chingtaep (111a), the can member 10 as electrically connected to the furnace bending chingtaep (111a) to facilitate the welding joint furnace chingtaep electrode assembly (1) on the (111a), the bent state in It can be received in the can member 10.
[109]
At this time, there is no effect chingtaep (111a) will be no chingtaep (111a) is bent because it is formed in two or more layers can maintain the mechanical strength, it does not easily cut off.
[110]
The bending furnace chingtaep (111a) are end to face the bottom face center of the can member 10.
[111]
The combination of the furnace bottom and chingtaep (111a) of the can member 10 can be welded to the bottom surface of the coupling bends the can member 10 of the furnace chingtaep (111a).
[112]
In addition, the end center portion of the bent portion to overlap one another at the end center portion of the electrode assembly (1) the electrode assembly 1 of the plurality of no-chingtaep (111a) in the installation step (S5) according to another embodiment of the present invention with the electrode tab 121 may be formed in the junction by welding or the like to the can member 10 at the same time.
[113]
[114]
Has been described with reference to the drawings illustrating a method of manufacturing a secondary battery and a secondary battery according to the present invention as described above, the present invention is not limited by the embodiments and drawings described above, the present invention in the claims in the art it is possible to fall the various embodiments by those skilled in the art.

Claims

[Claim 1]Electrode having a full phase the current collector electrode active material (a) in the longitudinal direction of the entire coating the holding portion 110 and the current collector throughout the active material (a) the current collector coated portion 120 is not coated 100; And wherein the current collector in the entire width direction of the active material and extending prevent the coating from the holding portion 110, the electrode notched tab portion 111 which is 100 formed to be overlapped at least two layers when the take-up; A secondary battery, comprising a step of including.
[Claim 2]
The method according to claim 1, wherein the notched tab portion 111 is a secondary battery, characterized in that extending to be continuous from the holding portion 110 is more than one-third of its length.
[Claim 3]
The method according to claim 1 or claim 2, the secondary battery in a state that the electrode 100 is wound so as to form the notched tab portion 111 includes a plurality of furnace chingtaep (111a) is cut.
[Claim 4]
The method according to claim 3, wherein the width of the furnace chingtaep (111a) is a secondary battery, characterized in that 4mm ~ 5mm.
[Claim 5]
The method according to claim 3, wherein the electrode 100 is accommodated in the can member 10, the furnace chingtaep (111a) is bent the secondary battery, characterized in that connected to the can member 10.
[Claim 6]
The method according to claim 5, wherein the furnace chingtaep (111a) is formed by bending the bent portions, characterized in that the secondary cell is joined to the can member 10.
[Claim 7]
The method according to claim 6, the secondary battery comprising the insulating member 130 formed between the end of the bent portion and the electrode 100.
[Claim 8]
The method according to claim 1, the secondary battery comprising the electrode tab 121 is attached to the uncoated portion 120.
[Claim 9]
The method according to claim 8, the notching tab portion 111 is notched (notching), and forming a plurality of furnace chingtaep (111a) is the electrode 100 is the can member 10 in a state where the electrode 100 is a take-up It received and the plurality of furnace chingtaep (111a) is bent secondary battery being connected to overlap the electrode tab (121).
[Claim 10]
The method according to claim 9, wherein the electrode tab 121 and the secondary battery, characterized in that the electrode tabs 121 and the plurality of furnace becomes chingtaep (111a) associated with overlap are joined to the can member 10.
[Claim 11]
The method according to claim 9, wherein the length of notching a plurality of furnace chingtaep (111a) is a secondary battery, characterized in that 8mm ~ 11mm.
[Claim 12]
The method according to claim 9, wherein the length of notching a plurality of furnace chingtaep (111a) is a secondary battery, characterized in that 9mm ~ 10mm.
[Claim 13]
The method according to claim 1, wherein the electrode 100 is a secondary battery, characterized in that the negative electrode.
[Claim 14]
Preparing an electrode 100 provided along the electrode current collector onto the active material (a) is applied to the holding portion 110 and the electrode active material (a) of the total of the current collector coated portion 120 is not applied to the longitudinal direction preparation step (S1); The electrode 100 is called the electrode 100 such that the notched tab portion (111) extending a length in a state that is not in one-third or more active material in the width direction of the entire current collector of the holding part 110 formed in the exposed notching the tab forming step (S2); Notching the tab portion 111 is formed in the electrode 100, the separator and the electrode 100 and the sanggeuk hyeongseongneun winding step the electrode assembly (1) by winding and then laminated to the other electrode (S3); The electrode assembly (1) no chingtaep forming step (S4) of forming a plurality of furnace chingtaep (111a) by cutting the notched tab portion 111 at the; And installation steps of the no-bond the chingtaep (111a) to the can member 10 to accommodate the electrode assembly (1) to the can member 10 (S5); Method of producing a secondary battery, comprising a step of including.
[Claim 15]
14. The method of producing a secondary battery, characterized in that to prepare the electrode 100 of the negative electrode prepared in the above step (S1).
[Claim 16]
The method according to claim 14, wherein said preparing step (S1) is the electrode current collector onto the active material (a) is applied to the holding portion 110 and the electrode active material (a) of the total of the current collector coated portion 120 is not coated width method of producing a secondary battery, characterized in that arranged in parallel relative to the direction.
[Claim 17]
The method according to claim 16, the width of the notched tab portion forming step (S2) is the above-holding portion 110 and the holding and cutting the uncoated portion 120 in the longitudinal direction of the whole of the current collector part 110 is arranged in the parallel direction with the active material (a) method of producing a secondary battery, characterized in that referred to the furnace notching tab portion 11 is not coated.
[Claim 18]
The method according to claim 14, wherein the notched tab portion forming step (S2) is a furnace so that while cutting the electrode 100 forming the electrode active material (a) the notching tab portion 111 is not covered in the width direction of the holding portion 110 method of producing a secondary battery, characterized in that call.
[Claim 19]
14. The method of producing a secondary battery, characterized in that for cutting the notched tab portion 111 to the laser in the furnace chingtaep forming step (S4).
[Claim 20]
The method according to claim 14, wherein the installing step (S5) is above the bent portion in the furnace chingtaep (111a) to accommodate the electrode assembly (1) in a state of bending the furnace chingtaep (111a) to the can member 10 method of manufacturing a secondary battery characterized in that joined to the can member 10.
[Claim 21]
The method according to claim 20, the method of producing a secondary battery in the installation step (S5), characterized in that joined to the can member 10 with the bent portion in the welding of the furnace chingtaep (111a).
[Claim 22]
The method according to claim 20, the method of producing a secondary battery that overlap one another by the bent portion of the plurality of the furnace chingtaep (111a) in the mounting step (S5) at the same time joined to the can member 10 is characterized.
[Claim 23]
The method according to claim 14, wherein the take-up step (S3) is a process for producing a rechargeable battery so as to form to overlap the notched tab portion (111) in two or more layers.