technical field
[One]
Cross Citation with Related Applications
[2]
This application claims the benefit of priority based on Korean Patent Application No. 10-2019-0171204 dated December 19, 2019, and all contents disclosed in the literature of the Korean patent application are incorporated as a part of this specification.
[3]
technical field
[4]
The present invention relates to a secondary battery including two types of electrolyte and a method for manufacturing 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.
[7]
The can-type secondary battery includes an electrode assembly, an electrolyte, a can for accommodating the electrode assembly and the electrolyte, and a cap assembly mounted in the opening of the can, and the pouch-type secondary battery includes an electrode assembly, an electrolyte, and an electrode assembly and an electrolyte for accommodating the electrolyte Includes pouch.
[8]
However, the secondary battery has an electrolyte having high ionic conductivity, chemical stability, temperature stability, and low cost, but since the electrolyte is injected before activation, it has good physical properties and has a narrow working voltage range, so it is often not used.
DETAILED DESCRIPTION OF THE INVENTION
technical challenge
[9]
The present invention was invented to solve the above problems, and the present invention accommodates a packaging material storing an electrolyte having excellent physical properties in a battery case in which an electrode assembly is accommodated, but the packaging material is formed of a material that is oxidized at a set voltage An object of the present invention is to provide a secondary battery capable of oxidizing the packaging material after the activation process and impregnating the electrode assembly with an electrolyte having excellent physical properties, thereby significantly improving battery performance, and a method for manufacturing the same.
means of solving the problem
[10]
A secondary battery of the present invention for achieving the above object includes an electrode assembly; a battery case accommodating the electrode assembly; a first electrolyte accommodated in the battery case and primarily impregnated in the electrode assembly; A packaging material accommodated in the battery case and having an oxidizing part that is oxidized and decomposed at a set voltage, and a second electrolyte that is stored in the packaging and is drawn out to the packaging material due to the decomposition of the oxidizing part and is secondarily impregnated into the electrode assembly. A reinforcing electrolyte member may be included.
[11]
The oxidizing part may be formed of a polymer material or a metal material that is oxidized at a set voltage.
[12]
The packaging material may be entirely formed of the oxidized portion, or the packaging material may be partially formed of the oxidized portion.
[13]
The set voltage may be 3V.
[14]
The packaging material may be attached to the inner surface of the battery case.
[15]
The electrode assembly may include an electrode lead drawn out of the battery case, and the oxidizing part provided in the packaging material may be decomposed while being oxidized by a voltage transmitted from the electrode lead located inside the battery case.
[16]
The oxidation part may include a horizontal oxidation surface formed in the longitudinal direction of the packaging material, and a vertical oxidation surface formed in a width direction of the packaging material to be orthogonal to the horizontal oxidation surface.
[17]
The oxidizing part may be formed of a metal material that is oxidized at a set voltage.
[18]
On the other hand, the secondary battery manufacturing method of the present invention comprises the steps of (a) manufacturing a packaging material including an oxidizing part oxidized at a set voltage, and then injecting a second electrolyte into the packaging material to prepare a reinforcing electrolyte member; (b) manufacturing a battery case including an upper case and a lower case; (c) attaching a reinforcing electrolyte member to the inner surface of the upper case; (e) accommodating the electrode assembly through the opening of the battery case, and then injecting a first electrolyte into the opening of the battery case to first impregnate the electrode assembly; (f) manufacturing an uncharged secondary battery by sealing the opening of the battery case; (g) charging and discharging an uncharged secondary battery to prepare a charging/discharging secondary battery; (h) when a set voltage is applied to the charge/discharge secondary battery to oxidize the oxidized part included in the packaging material, the electrode assembly is secondarily impregnated through the second electrolyte drawn out through the hole formed as the oxidized part is oxidized to manufacture a finished secondary battery may include the step of
[19]
In the step (a), the entire packaging material is formed of an oxidized portion of the polymer material, and in the step (h), the packaging material may be decomposed while being oxidized as a whole by a set voltage.
[20]
In the step (a), a part of the packaging material is formed of an oxidized portion of the polymer material, and in the step (h), the packaging material may be decomposed while only the oxidation portion, which is a part of the packaging material, is oxidized by a set voltage.
[21]
In the step (a), when a part of the packaging material is formed of an oxidized part of a polymer material, the oxidized part forms a horizontal oxidized surface in the longitudinal direction of the packaging material, and then a vertical oxidized surface in the width direction of the packaging material to be orthogonal to the horizontal oxidized surface. can form.
[22]
In step (a), the entire or part of the packaging material may be formed of an oxidized portion of a metal material.
Effects of the Invention
[23]
The secondary battery of the present invention is characterized in that a reinforcing electrolyte member is embedded in a battery case, wherein the reinforcing electrolyte member includes a packaging material having an oxidizing part oxidized at a set voltage and an electrolyte having excellent physical properties accommodated in the packaging material, Due to these characteristics, after the activation process, the oxidizing part is oxidized to draw out the electrolyte contained in the packaging material into the battery case, and thus the electrolyte having excellent physical properties can be impregnated into the electrode assembly, and as a result, the performance of the secondary battery can be improved. can be greatly increased.
[24]
In addition, in the secondary battery of the present invention, the oxidized part is formed of a polymer material, and due to such a feature, the oxidized part can be stably oxidized at a set voltage, and as a result, the electrolyte contained in the packaging material is stably oxidized into the battery case. can be withdrawn.
[25]
On the other hand, in the secondary battery of the present invention, the oxidation part may be formed of a metal material, and accordingly, the electrolyte solution contained in the packaging material can be stably drawn out into the battery case while the metal material as the oxidation part is oxidized at a set voltage.
[26]
In addition, in the secondary battery of the present invention, the packaging material is characterized in that the entire packaging material is formed of an oxidized part, and due to this characteristic, all packaging materials can be oxidized so that no packaging material remains inside the battery case, and as a result, the electrode assembly is defective due to the packaging material. can prevent this from happening.
[27]
In addition, in the secondary battery of the present invention, the packaging material has a feature that a part is formed of an oxidation part, and due to such a feature, generation of by-products inside the battery case can be minimized. In particular, the oxidation part is characterized in that a plurality of parts are formed throughout the packaging material, and due to this characteristic, the electrolyte contained in the packaging material can be drawn out evenly throughout the battery case, and as a result, the electrolyte having excellent physical properties is applied to the entire electrode assembly. It can be induced to be uniformly impregnated.
[28]
In addition, in the secondary battery of the present invention, the oxidized part is oxidized at 3V, and due to this characteristic, it is possible to prevent the oxidized part from being oxidized during the activation process.
[29]
In addition, in the secondary battery of the present invention, the packaging material is attached to the inner surface of the battery case, and due to this characteristic, it is possible to prevent the packaging material from moving inside the battery case, and in particular, the electrode assembly accommodated in the battery case by the packaging material is damage can be prevented.
[30]
In addition, in the secondary battery of the present invention, the oxidizing part is formed in a '+' shape on the packaging material, and due to this characteristic, the packaging material can be opened to spread, and as a result, the electrolyte contained in the packaging material is quickly transferred into the battery case. can be drawn out.
Brief description of the drawing
[31]
1 is a cross-sectional view showing a secondary battery according to a first embodiment of the present invention.
[32]
2 is a cross-sectional view illustrating a state in which a reinforcing electrolyte member provided in the secondary battery according to the first embodiment of the present invention is oxidized.
[33]
3 is a flowchart illustrating a method for manufacturing a secondary battery according to a first embodiment of the present invention.
[34]
4 is a cross-sectional view illustrating step (a) of a method for manufacturing a secondary battery according to a first embodiment of the present invention.
[35]
5 is a cross-sectional view illustrating step (b) of a method for manufacturing a secondary battery according to a first embodiment of the present invention.
[36]
6 is a cross-sectional view illustrating step (c) of a method for manufacturing a secondary battery according to a first embodiment of the present invention.
[37]
7 is a cross-sectional view illustrating steps (d) and (e) of a method for manufacturing a secondary battery according to a first embodiment of the present invention.
[38]
8 is a cross-sectional view illustrating step (f) of a method for manufacturing a secondary battery according to a first embodiment of the present invention.
[39]
9 is a cross-sectional view illustrating step (g) of a method for manufacturing a secondary battery according to a first embodiment of the present invention.
[40]
10 is a cross-sectional view illustrating a secondary battery according to a second embodiment of the present invention.
[41]
11 is a cross-sectional view illustrating a state in which a reinforcing electrolyte member provided in a secondary battery according to a second embodiment of the present invention is oxidized.
[42]
12 is a view showing an oxidation part of a reinforcing electrolyte member provided in a secondary battery according to a second embodiment of the present invention;
[43]
13 is a table showing the polymer material of the present invention.
[44]
14 is a table showing a metal material of the present invention.
Best mode for carrying out the invention
[45]
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 various 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.
[46]
[Secondary battery according to the first embodiment of the present invention]
[47]
As shown in FIGS. 1 and 2 , the secondary battery 100 according to the first embodiment of the present invention has a structure to increase battery performance, and accommodates the electrode assembly 110 and the electrode assembly 110 . a battery case 120, a first electrolyte 130 accommodated in the battery case 120 and first impregnated in the electrode assembly 110, built in the battery case 120 and in the electrode assembly 110 and a reinforcing electrolyte member 140 having a second electrolyte impregnated therein secondarily.
[48]
electrode assembly
[49]
The electrode assembly 110 has a structure in which a first electrode and a second electrode are alternately stacked with a separator interposed therebetween. And the first electrode includes an electrode tab. In particular, the electrode lead 111 drawn out of the battery case 120 is coupled to the electrode tab. The first electrode may be an anode, and the second electrode may be a cathode.
[50]
battery case
[51]
The battery case 120 includes an upper case 121 and a lower case 122 corresponding to each other, and a receiving part for accommodating the electrode assembly 110 while the upper case 121 and the lower case 122 are coupled to each other; , to form a sealing portion for sealing the accommodating portion hermetically.
[52]
first electrolyte
[53]
The first electrolyte 130 is an electrolyte for increasing the charging and discharging efficiency of the electrode assembly, provided in the receiving part of the battery case 120 and impregnated in the electrode assembly 110 .
[54]
reinforcing electrolyte
[55]
The reinforcing electrolyte member 140 includes an electrolyte for increasing battery performance after the activation process of the electrode assembly, and includes a packaging material 141 and a second electrolyte solution 142 stored in the packaging material 141 .
[56]
The packaging material 141 is accommodated in the battery case 120 and is provided with an oxidizing part that is oxidized and decomposed at a set voltage. That is, the packaging material 141 may withdraw the second electrolyte stored in the packaging material to the outside through a space formed while the oxidation part is oxidized.
[57]
For example, the packaging material 141 may be entirely formed of an oxidized part. That is, when the entire packaging material 141 is formed of an oxidizing part, the entire packaging material 141 can be oxidized and decomposed by a set voltage.
[58]
In the packaging material 141 having such a configuration, when a set voltage is applied, a hole or space is formed while the packaging material 141 formed as an oxidizing unit is oxidized, and thus the second electrolyte stored in the packaging material can be drawn into the battery case. .
[59]
Meanwhile, the set voltage may be 3V. That is, since charging and discharging proceeds below 3V during charging and discharging of the electrode assembly, oxidation of the packaging material 141 can be prevented during charging and discharging, and when a voltage of 3V or more is applied to the packaging material 141 after the activation process, the packaging material 141 is As it is oxidized, the second electrolyte may be drawn into the battery case.
[60]
On the other hand, the packaging material 141 formed of the oxidation part is formed of a polymer material that is oxidized at a set voltage, that is, a polymer material.
[61]
Here, the polymer material is, as described in FIG. 13, polyethylene oxide, polypropylene oxide, polydimethylsiloxane, polyacrylonitrile, polymethyl methacrylate ( Polymethyl Methacrylate), polyvinyl chloride (Polyvinyl Chloride), polyvinylidene fluoride (polyvinylidene fluoride), may be any one of polyvinylidene fluoride hexafluoropropylene (Polyvinylidene fluoridehexafluoropropylene).
[62]
On the other hand, the packaging material 141 is attached to the inner surface of the battery case 120, thereby preventing the flow of the packaging material 141 in the battery case 120, and accordingly, the packaging material 141 is the battery case 120 ) can be prevented from being wound or contacted with the electrode tab located inside.
[63]
The second electrolyte 142 is an electrolyte different from the first electrolyte, and in particular, is made of a material having superior physical properties than that of the first electrolyte 130 .
[64]
On the other hand, some of the materials used as the second electrolyte have high ionic conductivity by reacting at less than a set voltage (3V) to elute Cu. However, there is a problem that it cannot be used because it reacts at the set voltage. In order to solve the above problems, the second electrolyte can be stably impregnated into the electrode assembly by oxidizing the packaging material after the activation process and then accommodating the second electrolyte in the battery case in a state of being stored in the packaging material formed of the oxidation part, and , thereby achieving high ionic conductivity.
[65]
Meanwhile, the packaging material 141 may be provided to be connected to an electrode lead located inside the battery case. That is, the packaging material 141 is oxidized and decomposed by the voltage transmitted from the electrode lead 111 located inside the battery case 120 , and thus the packaging material 141 can be effectively oxidized. On the other hand, the packaging material 141 may be in contact with the electrode lead 111 located inside the battery case 120 , and thus the packaging material 141 is stably secured by the voltage transmitted from the electrode lead 111 . It can be decomposed by oxidation.
[66]
The reinforcing electrolyte member 140 having such a configuration stores the second electrolyte solution 142 having physical properties in the packaging material 141 formed as an oxidizing part so that the second electrolyte solution 142 is impregnated into the electrode assembly after the activation process of the electrode assembly and, as a result, the battery performance can be greatly improved.
[67]
Accordingly, the secondary battery 100 according to the first embodiment of the present invention includes a packaging material 141 having an oxidizing part and a reinforcing electrolyte member 140 having a second electrolyte 142, so that the second battery stored in the packaging material after the activation process is activated. The electrolyte may be impregnated into the electrode assembly, and as a result, the performance of the electrode assembly may be greatly improved.
[68]
Hereinafter, a method of manufacturing the secondary battery 100 according to the first embodiment of the present invention will be described.
[69]
[Method for manufacturing secondary battery according to the first embodiment of the present invention]
[70]
As shown in Figs. 3 to 9, the secondary battery manufacturing method according to the first embodiment of the present invention includes (a) manufacturing a reinforcing electrolyte member, (b) manufacturing a battery case, (c) Attaching a reinforcing electrolyte member, (d) first impregnating the electrode assembly, (e) manufacturing an uncharged secondary battery, (f) manufacturing a charge/discharge secondary battery, and (g) secondary finished product manufacturing the battery.
[71]
(a) step
[72]
Step (a) is for manufacturing the reinforcing electrolyte member, prepares an oxidized part of a polymer material that is oxidized at a set voltage, and processes the oxidized part into a pocket shape to manufacture the packaging material 141 . That is, the entire packaging material 141 is formed of an oxidized portion.
[73]
Next, the second electrolyte solution 142 having high physical properties is injected through the opening of the packaging material 141 , and then the opening of the packaging material 141 is sealed and sealed. Then, the reinforcing electrolyte member 140 may be manufactured.
[74]
Here, the oxidation part of the polymer material has a thickness of 0.5 mm to 1 mm so that it is easily oxidized when a set voltage is applied. That is, if the oxidized portion is 0.5 mm or less, it can be easily cut due to an external impact, and if it is 1 mm or more, it takes a lot of time to oxidize. Accordingly, the oxidized portion of the polymer material has a thickness of 0.5 mm to 1 mm, and accordingly, it is not easily cut by an external impact and can be quickly oxidized when a set voltage is applied.
[75]
Meanwhile, referring to FIG. 10 , the upper surface of the packaging material 141 attached to the battery case 120 is formed of a resin layer 141b, and the remainder is formed of an oxidation portion 141a of a polymer material that is oxidized at a set voltage. can do. Here, the resin layer is heat-sealed to the inner surface of the battery case 120 . Accordingly, the manufacturing cost of the packaging material 141 can be reduced, and the packaging material 141 can be stably attached to the battery case 120 . On the other hand, the entire resin layer formed on the upper surface of the packaging material 141 is attached to the inner surface of the battery case 120, thereby preventing the generation of by-products inside the battery case.
[76]
(b) step
[77]
Step (b) is for manufacturing the battery case, and the upper case 121 and the lower case 122 corresponding to each other are manufactured by forming two pouch films, and when the upper case and the lower case are combined, the battery case (120) can be prepared.
[78]
On the other hand, the inner surface of the upper case to which the reinforcing electrolyte member 140 is to be attached includes an adhesive surface 121a, the adhesive surface 121a improves the adhesive force of the reinforcing electrolyte member 140 and is located on the inner surface of the upper case. Prevents damage to the resin layer.
[79]
(c) step
[80]
Step (c) is for attaching the reinforcing electrolyte member, and attaching the reinforcing electrolyte member 140 to the inner surface of the upper case 121 of the battery case 120 . At this time, the reinforcing electrolyte member 140 is attached to the inner surface of the upper case through thermal fusion or adhesive.
[81]
On the other hand, the reinforcing electrolyte member 140 is attached to the center of the inner surface of the upper case, and accordingly, the second electrolyte 142 drawn out from the reinforcing electrolyte member 140 is applied to the entire electrode assembly 110 accommodated in the battery case 120 . It spreads uniformly, and thus the second electrolyte 142 can be uniformly impregnated throughout the electrode assembly 110 .
[82]
Meanwhile, the reinforcing electrolyte member 140 may be further attached to the inner surface of the lower case, and thus the second electrolyte 142 may be effectively impregnated into the electrode assembly 110 .
[83]
Meanwhile, the reinforcing electrolyte member 140 attached to the upper case and the reinforcing electrolyte member 140 attached to the lower case are disposed not to correspond to each other. That is, the reinforcing electrolyte member 140 is attached to one side of the inner surface of the upper case, and the reinforcing electrolyte member 140 is attached to the other side of the inner surface of the lower case. Accordingly, the second electrolyte solution 142 can be supplied to one side and the other side of the electrode assembly, and thus the second electrolyte solution 142 can be effectively impregnated in the entire electrode assembly.
[84]
(d) step
[85]
Step (d) is for first impregnating the electrode assembly. After receiving the electrode assembly 110 through the opening of the battery case 120 , the first electrolyte 130 is applied to the opening of the battery case 120 . inject Then, the first electrolyte 130 injected into the battery case 120 is first impregnated into the electrode assembly 110 .
[86]
In this case, the first electrolyte 130 uses a material having excellent impregnation power and charge/discharge, and thus the impregnation time of the electrode assembly 110 can be reduced.
[87]
(e) step
[88]
Step (e) is for manufacturing an uncharged secondary battery, and when the injection of the first electrolyte is completed, the opening of the battery case 120 is sealed and sealed. Then, an uncharged secondary battery can be manufactured.
[89]
(f) step
[90]
Step (f) is for manufacturing a charge/discharge secondary battery, and charges and discharges an uncharged secondary battery to activate it. Then, a charge-discharge secondary battery can be manufactured.
[91]
At this time, in step (f), charging and discharging is performed at a voltage of 3V or less, preferably 2V or less, during charging and discharging of an uncharged secondary battery.
[92]
(g) step
[93]
Step (g) is for manufacturing a finished secondary battery, and a set voltage is applied to the charge/discharge secondary battery. Then, a voltage is transmitted to the reinforcing electrolyte member 140 attached to the battery case 120, and at this time, the packaging material 141 included in the reinforcing electrolyte member 140 is oxidized and decomposed by the set voltage, and accordingly, the packaging material 141 ) as the second electrolyte 142 stored in the battery case 120 is withdrawn into the interior of the electrode assembly 110 is impregnated secondarily. When this process is completed, the finished secondary battery 100 can be manufactured.
[94]
Here, the entire packaging material 141 is formed of an oxidized polymer material, and accordingly, the packaging material 141 is decomposed while being oxidized when a set voltage is applied. That is, it can be naturally removed from the inside of the battery case 120 .
[95]
Hereinafter, in describing another embodiment of the present invention, the same reference numerals are used for components having the same functions as those of the above-described embodiment, and overlapping descriptions will be omitted.
[96]
[Secondary battery according to the second embodiment of the present invention]
[97]
As shown in FIGS. 10 to 12 , the secondary battery 100 according to the second embodiment of the present invention includes an electrode assembly 110 , a battery case 120 , a first electrolyte 130 , and the battery case 120 . ) and a reinforcing electrolyte member 140 having a second electrolyte embedded in the electrode assembly 110 and impregnated secondarily. The reinforcing electrolyte member 140 includes a packaging material 141 and a second electrolyte solution 142 stored in the packaging material 141 .
[98]
Here, the packaging material 141 is provided as an oxidizing part 141a, a part of which is oxidized and decomposed at a set voltage. That is, a part of the packaging material 141 is formed of an oxidizing portion 141a that is oxidized and decomposed at a set voltage, and the remaining portion is formed of a resin layer 141b that is not oxidized at a set voltage.
[99]
That is, a portion of the packaging material 141 attached to the battery case 120 may be formed of a resin layer 141b, and a portion not attached to the battery case 120 may be formed of an oxidation portion 141a.
[100]
Therefore, in the secondary battery 100 according to the second embodiment of the present invention, the second electrolyte 142 stored in the packaging material 141 can be withdrawn into the battery case 120 at a set voltage, and in particular, By oxidizing only a portion, the generation of by-products can be minimized.
[101]
On the other hand, the oxidized portion 141a is formed in at least two or more, preferably 10 or more places in the packaging material 141. Accordingly, when the oxidation portion 141a is oxidized, at least 10 or more holes are formed in the packaging material 141. can be formed, and as a result, the second electrolyte 142 can be effectively drawn out.
[102]
On the other hand, the oxidation portion (141a) is the horizontal oxidation surface (141a-1) formed in the longitudinal direction of the packaging material (141), and the horizontal oxidation surface (141a-1) and perpendicular to the width direction of the packaging material (141) Includes a vertical oxide surface (141a-2) formed of. Accordingly, when the horizontal oxidation surface 141a-1 and the vertical oxidation surface 141a-2 are oxidized, the packaging material 141 is unfolded and the second electrolyte 142 can be quickly drawn out.
[103]
[Method for manufacturing secondary battery according to the second embodiment of the present invention]
[104]
A secondary battery manufacturing method according to a second embodiment of the present invention includes (a) manufacturing a reinforcing electrolyte member, (b) manufacturing a battery case, (c) attaching a reinforcing electrolyte member, (d) electrode A step of first impregnating the assembly, (e) manufacturing an uncharged secondary battery, (f) manufacturing a charge/discharge secondary battery, and (g) manufacturing a finished secondary battery.
[105]
Here, in step (a), the oxidation portion 141a of the polymer material having a predetermined size is processed, and then the oxidation portion 141a is placed in a mold having a packaging material shape. Next, the resin layer 141b is prepared by injecting a resin solution into the mold. Then, the packaging material 141 in which the oxidation part 141a and the resin layer 141b are integrated can be manufactured.
[106]
Here, the oxidation part forms a horizontal oxidation surface in the longitudinal direction of the packaging material, and then forms a vertical oxidation surface in the width direction of the packaging material to be orthogonal to the horizontal oxidation surface.
[107]
On the other hand, when a set voltage is applied to the packaging material in step (h), the oxidation portion provided in the packaging material is oxidized to form a hole, and the second electrolyte stored in the packaging material is drawn out of the battery case through the hole and impregnated into the electrode assembly.
[108]
[Secondary battery according to the third embodiment of the present invention]
[109]
In the secondary battery 100 according to the third embodiment of the present invention, the oxidizing part is formed of a metal material that is oxidized at a set voltage, as shown in FIG. 14 , and the metal material is aluminum or nickel. , silver, gold, palladium, platinum, titanium, tantalum, copper, chromium, molybdenum, zinc ) may be any one of
[110]
That is, in the secondary battery 100 according to the third embodiment of the present invention, as shown in FIG. 14 , when the metal forming the oxidation part and the electrolyte are combined, it can be confirmed that oxidation occurs at 3V or higher.
[111]
For example, when 3.7V is applied to the secondary battery including the reinforcing electrolyte member to which the oxidation portion of the silver material is applied and the electrolyte (LIBVF4), it can be confirmed that the oxidation portion of the silver material is oxidized. Therefore, in the third embodiment of the present invention, The secondary battery 100 can stably oxidize the oxidized part at 3 V or higher, and as a result, the second electrolyte stored in the packaging material can be stably withdrawn.
[112]
The scope of the present invention is indicated by the claims to be described later rather than the above detailed description, and various embodiments derived from the meaning and scope of the claims and their equivalent concepts are possible.
[113]
[Explanation of code]
[114]
100: secondary battery
[115]
110: electrode assembly
[116]
120: battery case
[117]
130: first electrolyte
[118]
140: reinforcing electrolyte member
[119]
141: packaging material
[120]
141a: oxidation part
[121]
142: second electrolyte
Claims
[Claim 1]
electrode assembly; a battery case accommodating the electrode assembly; a first electrolyte accommodated in the battery case and primarily impregnated in the electrode assembly; A packaging material accommodated in the battery case and having an oxidizing part that is oxidized and decomposed at a set voltage, and a second electrolyte that is stored in the packaging and is drawn out to the packaging material due to the decomposition of the oxidizing part and is secondarily impregnated into the electrode assembly. A secondary battery comprising a reinforcing electrolyte member.
[Claim 2]
The secondary battery according to claim 1, wherein the oxidizing part is formed of a polymer material that is oxidized at a set voltage.
[Claim 3]
The secondary battery according to claim 1, wherein the packaging material is entirely formed of an oxidizing part.
[Claim 4]
The secondary battery according to claim 1, wherein the packaging material is partially formed of an oxidizing part.
[Claim 5]
The secondary battery according to claim 1, wherein the set voltage is 3V.
[Claim 6]
The secondary battery according to claim 1, wherein the packaging material is attached to an inner surface of the battery case.
[Claim 7]
The secondary battery according to claim 1, wherein the electrode assembly includes an electrode lead drawn out of the battery case, and the oxidizing part provided in the packaging material is oxidized and decomposed by a voltage transmitted from the electrode lead located inside the battery case. .
[Claim 8]
The secondary battery of claim 4 , wherein the oxidation part includes a horizontal oxide surface formed in a longitudinal direction of the packaging material and a vertical oxidation surface formed in a width direction of the packaging material to be orthogonal to the horizontal oxidation surface.
[Claim 9]
The secondary battery according to claim 6, further comprising an adhesive surface on the inner surface of the battery case to which the packaging material is attached.
[Claim 10]
The secondary battery according to claim 1, wherein the oxidizing part is formed of a metal material that is oxidized at a set voltage.
[Claim 11]
(a) manufacturing a packaging material including an oxidizing part oxidized at a set voltage, and then injecting a second electrolyte into the packaging material to prepare a reinforcing electrolyte member; (b) manufacturing a battery case including an upper case and a lower case; (c) attaching a reinforcing electrolyte member to the inner surface of the upper case; (e) accommodating the electrode assembly through the opening of the battery case, and then injecting a first electrolyte into the opening of the battery case to first impregnate the electrode assembly; (f) manufacturing an uncharged secondary battery by sealing the opening of the battery case; (g) charging and discharging an uncharged secondary battery to prepare a charging/discharging secondary battery; (h) when a set voltage is applied to the charge/discharge secondary battery to oxidize the oxidized part included in the packaging material, the electrode assembly is secondarily impregnated through the second electrolyte drawn out through the hole formed as the oxidized part is oxidized to manufacture a finished secondary battery A secondary battery manufacturing method comprising the step of:
[Claim 12]
The method according to claim 11, wherein the packaging material is entirely formed of an oxidized portion of a polymer material, and in step (h), the packaging material is decomposed while being oxidized as a whole by a set voltage.
[Claim 13]
The method according to claim 11, wherein the packaging material is partially formed of an oxidized portion of a polymer material, and in the step (h), the packaging material is decomposed while only the oxidation portion, which is a part of the packaging material, is oxidized by a set voltage.
[Claim 14]
The method according to claim 11, wherein when a part of the packaging material is formed of an oxidized portion of a polymer material in step (a), the oxidation portion forms a horizontal oxidation surface in the longitudinal direction of the packaging material, and then the width of the packaging material is perpendicular to the horizontal oxidation surface. A secondary battery manufacturing method for forming a vertical oxide surface in a direction.
[Claim 15]
The method according to claim 11, wherein the packaging material is entirely or partially formed of an oxidized portion of a metal material.