KR100633302B1 - Terminal plate and method of manufacturing terminal plate and electric energy storage device and method of manufacturing electric energy storage device - Google Patents

Abstract

The terminal plate of the electrical storage device is formed by insulatingly bonding the positive electrode connecting plate and the negative electrode connecting plate to the positive electrode connecting plate connected to the positive electrode of the electrode, the negative electrode connecting plate connected to the negative electrode of the electrode with a coupling member. A sealing member is provided between the positive electrode connecting plate and the coupling member and between the negative electrode connecting plate and the coupling member. Therefore, leakage of electrolyte through the terminal plate in the electrical storage device is prevented.

Description

Terminal plate and method of manufacturing terminal plate and electric energy storage device and method of manufacturing electric energy storage device

1 is a front perspective view for explaining a terminal plate according to a first embodiment of the present invention.

FIG. 2 is a rear perspective view of the terminal plate shown in FIG. 1.

3 is an exploded perspective view of the terminal plate shown in FIG. 1.

4 is an enlarged view illustrating an enlarged portion A of FIG. 3.

FIG. 5 is a cross-sectional view of the VV ′ line of FIG. 1.

FIG. 6 is a cross-sectional view of the VI-VI ′ line of FIG. 1.

7 is a perspective view for explaining a terminal plate according to a second embodiment of the present invention.

FIG. 8 is a cross-sectional view taken along the line VII-VII 'of FIG. 7.

FIG. 9 is a perspective view illustrating a state in which a sealing member is formed in the connecting plate of FIG. 7.

10 is a cross-sectional view illustrating an electrical energy storage device according to a third embodiment of the present invention.

FIG. 11 is a cross-sectional view taken along the line VII-VII 'of FIG. 10.

12 is a flowchart illustrating a method of manufacturing a terminal board according to a fourth embodiment of the present invention.

13 is a flowchart illustrating a method of manufacturing a terminal board according to a fifth embodiment of the present invention.

14 is a flowchart illustrating a method of manufacturing an electrical energy storage device according to a sixth exemplary embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

110: anode connecting plate 112: body

114: positive lead connecting portion 116: positive terminal

120: cathode connecting plate 122: body

124: negative lead connection portion 126: negative electrode terminal

130: first coupling member 131: first groove

132: second groove 133: third groove

134: fourth groove 135: first receiving hole

136: second receiving hole 137: projection

138: first hole 140: second coupling member

141: third accommodation hole 142: fourth accommodation hole

143: second hole 144: protrusion

150: sealing member 210: anode connecting plate

220: negative electrode connecting plate 230: coupling member

240 sealing member 310 electrode winding

311 anode 312 anode lead

313: cathode 314: cathode lead

315: separator 316: core

320 container 330 terminal portion

The present invention relates to a terminal plate, a manufacturing method thereof, and an electric energy storage device and a manufacturing method thereof, and more particularly, to a terminal plate and a manufacturing method thereof, and an electrical energy storage device and a manufacturing method thereof connected to an electrode housed in a container. .

In general, the terminal connection method is directly related to the resistance and productivity of the electrical energy storage device and the user's convenience of using the same in an electric energy storage device such as a battery or a capacitor. As a large capacity and small resistance are required, the importance of the terminal connection method becomes more and more important. do.

In general, an electrical energy storage device such as a battery or a capacitor has a different structure of terminal connection according to its shape, and the terminal connection method is changed according to the characteristics of the electrical energy storage device.

The electrical energy storage device is formed of an electrode winding, a container, and a terminal plate.

In the electrode winding body, an anode, a separator, and a cathode are sequentially wound, and an electrolyte solution is provided between the anode and the cathode. The container accommodates the electrode winding body through an opening formed at one side.

The terminal plate extends the positive electrode and the negative electrode of the electrode winding body to the outside of the container, respectively. The terminal plate includes a positive connection plate and a negative connection plate, and a coupling member made of an insulating material surrounding the positive connection plate and the negative connection plate.

When using an electric energy storage device having a terminal plate of the type described above, the temperature and pressure inside the vessel rises. The connection plate and the coupling member expand due to the temperature and pressure rise. The connecting plate of the metal material and the coupling member of the insulating material is different in the degree of expansion, the gap is formed between the connecting plate and the coupling member. There is a problem that the electrolyte inside the container leaks through the gap.

A first object of the present invention for solving the above problems is to provide a terminal plate that can prevent the leakage of the electrolyte in the container.

A second object of the present invention for solving the above problems is to provide an electrical energy storage device having a terminal plate as described above.

A third object of the present invention for solving the above problems is to provide a method for manufacturing a terminal plate that can prevent the leakage of the electrolyte in the container.

A fourth object of the present invention for solving the above problems is to provide a method for manufacturing an electrical energy storage device having a terminal plate as described above.

In order to achieve the first object of the present invention, the terminal plate according to the present invention is a positive electrode connecting plate and the electrode having a positive electrode connecting portion electrically connected to the positive electrode of the electrode for storing electrical energy and the positive terminal opposite the positive connecting portion And a negative electrode connecting plate having a negative electrode connecting portion electrically connected to the negative electrode of the negative electrode terminal and a negative electrode terminal facing the negative connecting portion. The coupling member surrounds the positive electrode connection plate and the negative electrode connection plate to expose the connection parts and the terminals, and insulates the positive electrode connection plate and the negative electrode connection plate. The sealing member is provided between the positive electrode connecting plate and the coupling member and between the negative electrode connecting plate and the coupling member, respectively.

In order to achieve the second object of the present invention, the electric energy storage device according to the present invention includes an electrode winding body and an electrode winding body including an anode, a separator, and a cathode, which are sequentially wound and including an electrolyte solution provided between the anode and the cathode. It has a container for receiving and opening one side. The terminal part seals one open side of the container, a positive electrode connecting plate having a positive electrode connecting part electrically connected to the positive electrode and a positive electrode terminal facing the positive connecting part, a negative electrode connecting part electrically connected to the negative electrode of the electrode and the A negative electrode connecting plate having a negative electrode terminal opposite to the negative electrode connecting part, a coupling member surrounding the positive electrode connecting plate and the negative electrode connecting plate to expose the connecting parts and the terminals, and insulating the positive electrode connecting plate and the negative electrode connecting plate; Sealing members provided between the positive electrode connecting plate and the coupling member and between the negative electrode connecting plate and the coupling member, respectively.

In order to achieve the third object of the present invention, a method of manufacturing a terminal plate according to the present invention, first, an anode connection having an anode connection electrically connected to an anode of an electrode for storing electrical energy and an anode terminal opposite to the anode connection. A negative electrode connecting plate having a plate, a negative electrode connecting portion electrically connected to the negative electrode of the electrode, and a negative electrode terminal facing the negative connecting portion are prepared. Subsequently, a first coupling member is disposed such that the positive electrode connecting portion is accommodated in the first accommodating hole, and the negative electrode connecting portion is respectively accommodated in the second accommodating hole, the positive electrode terminal is in the third accommodating hole, and the negative electrode terminal is in the fourth accommodating hole. The second coupling member is arranged to be accommodated in each. Next, after the sealing member is disposed between the positive electrode connecting plate and the first coupling member, and between the negative electrode connecting plate and the first coupling member, the first coupling member and the second coupling member are coupled to each other.

Another terminal plate manufacturing method according to the present invention in order to achieve the third object of the present invention, first, a positive electrode having a positive electrode connecting portion electrically connected to the positive electrode of the electrode for storing electrical energy and the positive electrode terminal opposite the positive connecting portion A negative electrode connecting plate having a connecting plate, a negative electrode connecting portion electrically connected to the negative electrode of the electrode, and a negative electrode terminal facing the negative connecting portion is prepared. Next, sealing members are formed along the peripheries of the positive and negative connection plates, respectively. Subsequently, a coupling member is formed to insulate the positive electrode connecting plate and the negative electrode connecting plate by covering the positive electrode connecting plate and the negative electrode connecting plate to expose the connection parts and the terminals.

In order to achieve the fourth object of the present invention, a method of manufacturing an electrical energy storage device according to the present invention firstly, an anode, a separator, and a cathode are sequentially wound, and an electrolyte is provided between the anode and the cathode to form an electrode winding body. do. Subsequently, a positive electrode connecting plate having a positive electrode connecting portion electrically connected to the positive electrode and a positive electrode terminal facing the positive connecting portion, a negative electrode connecting portion having a negative electrode connecting portion electrically connected to the negative electrode of the electrode and a negative terminal facing the negative connecting portion Wrapping the positive electrode connecting plate and the negative electrode connecting plate to expose the plate, the connecting portion and the terminal, the coupling member to insulate the positive connection plate and the negative connection plate and between the positive connection plate and the coupling member and the negative electrode connection Terminal plates are formed using sealing members provided between the plate and the coupling member, respectively. After inserting the electrode holder body into the container, the terminal plate is connected to the container so that the positive electrode connecting portion of the terminal plate is electrically connected to the positive electrode of the electrode winding body, and the negative electrode connecting portion of the terminal plate is electrically connected to the negative electrode of the electrode winding body, respectively. Bond to.

According to the present invention configured as described above, a sealing member is provided between the positive electrode connecting plate and the coupling member and between the negative electrode connecting plate and the coupling member, respectively. Therefore, even if the temperature and pressure inside the electrical energy storage device increases, leakage of the electrolyte through the terminal plate may be prevented.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a front perspective view illustrating a terminal plate according to a first preferred embodiment of the present invention, FIG. 2 is a rear perspective view of the terminal plate shown in FIG. 1, and FIG. 3 is an exploded perspective view of the terminal plate shown in FIG. 1.

4 is an enlarged view illustrating an enlarged portion A of FIG. 3, FIG. 5 is a cross-sectional view taken along the line VV ′ of FIG. 1, and FIG. 6 is a cross-sectional view taken along the line VI-VI ′ of FIG. 1. .

1 to 6, the terminal plate 100 includes a positive connection plate 110, a negative connection plate 120, a first coupling member 130, a second coupling member 140, and a sealing member 150. It is composed of

The positive electrode connecting plate 110 is composed of a positive electrode connecting plate body 112, a positive electrode lead connecting portion 114 and a positive electrode terminal 116. The positive connection plate body 112 is in the form of a plate similar to the fan shape. The positive lead connecting portion 114 is formed to protrude from the upper surface of the positive connecting plate body 112. The anode lead connecting portion 114 is in close contact with the anode lead extending from the anode of the electrode. The positive electrode terminal 116 protrudes from a lower surface of the positive electrode connecting plate body 112.

The positive electrode connecting plate 110 is integrally formed with the positive electrode connecting plate body 112, the positive lead connecting portion 114, and the positive electrode terminal 116. The positive electrode connecting plate 110 is integrally manufactured through die casting, casting, or the like, or welding or soldering the positive lead connecting portion 114 and the positive electrode terminal 116 to the positive electrode connecting plate body 112. Joining may be performed by soldering or brazing.

The negative electrode connection plate 120 has a form symmetrical with the positive electrode connection plate 110. The negative electrode connection plate 120 includes a negative electrode connection plate body 122, a negative electrode lead connection part 124, and a negative electrode terminal 126. The negative connection plate body 122 has a plate shape similar to a fan shape. The negative lead connecting portion 124 is formed to protrude from the upper surface of the negative connecting plate body 122. The negative lead connecting portion 124 is in close contact with the negative electrode lead extending from the negative electrode of the electrode. The negative electrode terminal 126 protrudes from a lower surface of the negative electrode connecting plate body 122.

The negative electrode connecting plate 120 is integrally formed with a negative electrode connecting plate body 122, a negative electrode lead connecting portion 124, and a negative electrode terminal 126. The negative electrode connecting plate 120 is integrally manufactured through die casting, casting, or the like, or welding or soldering the negative electrode lead connecting portion 124 and the negative electrode terminal 126 to the negative electrode connecting plate body 122. Joining may be performed by soldering or brazing.

The positive electrode connecting plate 110 and the negative electrode connecting plate 120 are made of metal.

Specifically, the material of the positive lead connecting portion 114 is the same series as the positive electrode material of the electrode, the material of the negative lead connecting portion 124 is preferably used the same series as the negative electrode material of the electrode. Here, the same series means a group of metals that can be generally recognized as a metal of the same series, such as a metal and an alloy including the metal.

Since the positive electrode terminal 116 and the negative electrode terminal 126 are not exposed to the electrolyte, mechanical and electrical characteristics should be considered when selecting materials rather than electrochemical stability. Therefore, it is preferable that the material is easy to be joined by welding, soldering, brazing, etc. The material is copper alloy and aluminum alloy which are excellent in mechanical properties and have good electrical conductivity.

The first coupling member 130 has a disc shape and has a first groove 131 for accommodating the positive electrode connecting plate body 112 and a second groove for accommodating the negative electrode connecting plate body 122 on an upper surface thereof. 132 is formed. The first groove 131 is formed in a shape corresponding to the positive connection plate body 112, the second groove 132 is formed in a shape corresponding to the positive connection plate body 122.

As shown in FIG. 4, a third groove 133 is formed along an edge of the first groove 131. Similarly, a fourth groove 134 is formed along the edge of the second groove 132.

The first accommodating hole 135 for penetrating the upper and lower portions of the first coupling member 130 in the center portion of the first groove 131 and for accommodating the positive terminal 116 of the positive connection plate 110 is provided. Is formed. A second accommodating hole 136 penetrates the top and bottom of the first coupling member 130 in the central portion of the second groove 132 and accommodates the negative electrode terminal 126 of the negative electrode connecting plate 120. Is formed.

A protrusion 137 is formed along an upper surface edge of the first coupling member 130. The protrusion 137 is used for welding with the second coupling member 140.

On the other hand, one side of the first coupling member 130 is formed with a first hole 138 penetrating up and down. The first hole 138 is for fixing a safety vent, and a thread is formed on an inner surface thereof. The safety valve is broken at a pressure lower than the explosion pressure to prevent the energy storage device from exploding due to high pressure.

The second coupling member 140 has a disc shape, penetrates the upper and lower sides of the second coupling member 140 on one side, and receives a third accommodating part 114 of the positive electrode connecting plate 110. The hole 141 is formed. The other side of the second coupling member 140 penetrates the top and bottom of the second coupling member 140, the fourth receiving hole 142 for accommodating the negative lead connecting portion 124 of the negative electrode connecting plate 120 Is formed.

Meanwhile, a second hole 143 is formed at a position corresponding to the first hole 138 of the first coupling member 130 in the second coupling member 140. Like the first hole 138, the second hole is for fixing a safety vent, and a thread is formed on an inner surface thereof.

A protrusion 144 is formed at the center of the upper surface of the second coupling member 140. The protrusion 144 is inserted into a core of an electrode winding formed by winding an anode, a separator, and a cathode in sequence. Therefore, the protrusion 144 allows the positive lead extending from the positive electrode and the positive lead connecting portion 114 and the negative lead extending from the negative electrode to the negative lead connecting portion 124 to be in close contact with each other.

The first coupling member 130 and the second coupling member 140 are integrally formed. The first coupling member 130 and the second coupling member 140 are welded by applying an ultrasonic wave to the protrusion 137 of the first coupling member 130 to be integrally formed. The first coupling member 130 and the second coupling member 140 insulate the positive connection plate 110 and the negative connection plate 120.

Materials used to form the first coupling member 130 and the second coupling member 140 include polyethylene (PE), polypropylene (PP), polyphenylene sulfide (Polyphenylene) having excellent chemical resistance. Sulfide: PPS), PolyEther Ether Ketone (PEEK), Polytetrafluoro Ethylene (PTFE), etc. may be selected. In particular, PPS and PEEK have excellent chemical resistance, heat resistance and mechanical strength.

The sealing member 150 is provided between the positive electrode connecting plate 110 and the first coupling member 130 and between the negative electrode connecting plate 120 and the first coupling member 130, respectively. Specifically, the sealing member 150 is provided in the third groove 133 and the fourth groove 134, respectively. Therefore, the sealing member 150 has a closed curve shape. As the material of the sealing member 150, rubber is preferably used.

The sealing member 150 prevents the electrolyte from leaking between the positive electrode connecting plate 110 and the first coupling member 130 and between the negative electrode connecting plate 120 and the first coupling member 130. can do.

FIG. 7 is a perspective view illustrating a terminal plate according to a second exemplary embodiment of the present invention, FIG. 8 is a sectional view taken along the line VII-VII 'of FIG. 7, and FIG. 9 is a sealing member on the connecting plate of FIG. Is a perspective view for explaining a state formed.

7 to 9, the terminal plate 200 includes a positive electrode connecting plate 210, a negative electrode connecting plate 220, a coupling member 230, and a sealing member 240.

Since the description of the positive electrode connecting plate 210 and the negative electrode connecting plate 220 is the same as the positive electrode connecting plate 110 and the negative electrode connecting plate 120 of the first embodiment, a detailed description thereof will be omitted.

Since the coupling member 230 is the same as the shape when the first coupling member 130 and the second coupling member 140 of the first embodiment are welded by ultrasonic waves, the description of the shape will be omitted.

Unlike the first embodiment, the coupling member 230 is integrally formed by injection molding. That is, the insulating material is injected into the mold and molded by inserting the positive and negative connection plates 210 and 220 into the mold.

The insulating material may be selected from polyethylene, polyflopropylene, polyphenylene sulfide, polyether ether ketone, polytetrafluoroethylene, and the like.

The sealing member 240 is provided between the positive electrode connecting plate 210 and the coupling member 230 and between the upper electrode connecting plate 220 and the coupling member 230, respectively. In this case, the sealing member 240 is integrally formed along the circumference of the positive electrode connecting plate 210. In addition, the sealing member 240 is integrally formed along the circumference of the negative connection plate 220.

The sealing member 240 is formed by injecting a rubber material around the positive electrode connecting plate 210 and the negative electrode connecting plate 210. Of course, the sealing member 240 is first formed before the coupling member 230 is formed.

FIG. 10 is a cross-sectional view for describing an electric energy storage device according to a third exemplary embodiment of the present invention, and FIG. 11 is a cross-sectional view based on the XI-XI 'line of FIG. 10.

10 and 11, the electrical energy storage device 300 includes an electrode winding body 310, a container 320, and a terminal plate 330.

In the electrode winding body 310, a positive electrode 311, a negative electrode 313, and a separator 315 are wound around the core 316. Specifically, the anode 311, the separator 315, the cathode 313, and the separator 315 are sequentially wound around the core 316. On one side of the anode 311, a plurality of anode leads 312 extending from the anode 311 are formed. The cathode 313 has a plurality of cathode leads 314 extending from the cathode 313 on the same side as the anode 311. The positive lead 312 and the negative lead 314 are formed separately from each other. Therefore, the electrode winding body 310 has a cylindrical shape as a whole.

Since the positive electrode lead 312 and the negative electrode lead 314 are formed on only one side of the electrode winding body 310, when the cable is connected to the terminal or connected in series or in parallel, it is more convenient when the leads are formed on both sides. . Specifically, when the terminal is in one direction, the bus bar can be easily installed after the electrical energy storage device is inserted into the case in series or parallel connection, and the volume of the case is minimized because the bus bar exists only on one side. You can. In addition, if a balancing circuit is used to equalize the voltage in series connection, it is convenient to use the screw fixing method after placing the balancing circuit on the bus rock when the terminal is in one direction.

The container 320 has a cylindrical shape with an upper portion open to accommodate the electrode winding body 310. A protrusion for fixing the electrode winding body 310 is formed at the center of the inner lower surface of the container 320.

As the container 320, a metal material such as aluminum, stainless steel, or tin plated steel may be used, or a resin material such as PE, PP, PPS, PEEK, or PTFE may be used. The material of the container 320 is preferably used differently depending on the type of electrolyte. For example, in the case of the electrical energy storage device 300 using an electrolyte, in consideration of chemical resistance, PE and PP are excellent in acid and base resistance in plastics, and are suitable as a material of the container 320, and among metals Stainless steel is partially stable In the case of the electrical energy storage device 300 using an organic electrolyte, the material of the container is aluminum in terms of price, chemical resistance, weight, processability in the case of metal, PE, PP in the case of plastic has excellent chemical resistance Indicates.

A detailed description of the terminal plate 330 is the same as the terminal plate 100 according to the first embodiment or the terminal plate 200 according to the second embodiment, and thus will be omitted.

The terminal plate 330 is inserted into the container 320 in the direction in which the positive lead connecting portion and the negative lead connecting portion are formed.

The electrode winding body 310 is inserted into an open portion of the container 320. Subsequently, the positive electrode lead 312 and the negative electrode lead 314 of the electrode winding body 310 are formed on the terminal plate 330 by using the protrusion of the center of the terminal plate 330 and the protrusion of the central portion of the inner lower surface of the container 320. The terminal plate 330 and the container 320 are coupled to each other so as to maintain a close contact with the positive lead connecting portion and the negative lead connecting portion, respectively. The terminal plate 330 and the container 320 is preferably sealed by a rubber ring.

The terminal plate 330 and the container 320 may be used in various ways, such as welding, seaming.

On the other hand, although not shown in the hole formed through the upper and lower sides of the terminal plate 330 is provided with a safety valve. The safety edge is threaded on the outer surface to correspond to the thread formed on the inner surface of the hole, and has a hole in the longitudinal direction. The metal foil is mounted to the hole formed in the length direction to block the hole. The safety valve is to prevent the electrical energy storage device 300 from being exploded due to high pressure, and the metal foil is broken at a pressure lower than the explosion pressure.

12 is a flowchart illustrating a method of manufacturing a terminal board according to a fourth embodiment of the present invention.

12, the present embodiment provides a method of manufacturing the terminal plate 100 according to the first embodiment.

In order to manufacture the terminal plate 110, first, the positive electrode connecting plate 110, the negative electrode connecting plate 120 and the sealing member 150 between the first coupling member 130 and the second coupling member 140. ) Is placed (S110).

Specifically, the sealing member 150 is fitted into the third groove 133 and the fourth groove 134 formed on the upper surface of the first coupling member 130.

Next, the body 112 of the positive electrode connecting plate 110 is fitted into the first groove 131 of the first coupling member 130. In this case, the positive terminal 116 is accommodated in the first receiving hole 135 of the first coupling member 130 to protrude downward from the first coupling member 130. Similarly, the body 122 of the negative connection plate 120 is fitted into the second groove 132 of the first coupling member 130. In this case, the negative terminal 126 is accommodated in the second receiving hole 136 of the first coupling member 130 to protrude downward from the first coupling member 130.

Subsequently, the second coupling member 140 is fitted on the first coupling member 130 to surround the positive connection plate 110 and the negative connection plate 120. In this case, the positive lead connecting portion 114 of the positive connecting plate 110 is accommodated in the third receiving hole 141 of the second coupling member 140 to protrude upward from the second coupling member 140. Likewise, the negative lead connecting portion 124 of the negative connecting plate 120 is accommodated in the fourth receiving hole 142 of the second coupling member 140 to protrude upward of the second coupling member 140.

As described above, when the first coupling member 130, the second coupling member 140, the positive electrode connecting plate 110, the negative electrode connecting plate 120, and the sealing member 150 are disposed, the first coupling member 130 is disposed. ) And the second coupling member 140. (S120)

The protrusion 137 is melted by applying ultrasonic waves to the protrusion 137 formed along the upper edge of the first coupling member 130. As the protrusion 137 is melted, the first coupling member 130 and the second coupling member 140 are integrated. That is, the first coupling member 130 and the second coupling member 140 are coupled by welding.

13 is a flowchart illustrating a method of manufacturing a terminal plate according to a fifth embodiment of the present invention.

Referring to FIG. 13, the present embodiment provides a method of manufacturing the terminal board 200 according to the second embodiment.

In order to manufacture the terminal plate 200, a positive connection plate 210 and a negative connection plate 220 are prepared.

The positive electrode connecting plate 210 is integrally manufactured through die casting, casting, or the like, or is manufactured by bonding the positive lead connecting portion and the positive electrode terminal to the positive electrode connecting plate body using welding, soldering, or brazing.

A sealing member 230 is formed along the circumferences of the positive electrode connecting plate 210 and the negative electrode connecting plate 220.

The sealing member 230 is injection-molded a rubber material having chemical resistance along the side of the body of the positive electrode connecting plate 210 and the side of the negative electrode connecting plate 220.

Subsequently, a coupling member 230 is formed to insulate the positive electrode connecting plate 210 and the negative electrode connecting plate 210 so as to surround the positive electrode connecting plate 210 and the negative electrode connecting plate 220.

The bonding member 230 is formed by injecting resin of an insulating material in a molten state into the mold while fixing the anode connecting plate 210 and the cathode connecting plate 220 on which the sealing member 240 is formed, into the mold. In this case, the coupling member 230 is formed to protrude from the positive terminal, the positive lead connecting portion, the negative terminal and the negative lead connecting portion, respectively.

14 is a flowchart illustrating a method of manufacturing an electrical energy storage device according to a sixth exemplary embodiment of the present invention.

Referring to FIG. 14, the present embodiment provides a method of manufacturing the electrical energy storage device 300 according to the third embodiment.

The positive electrode 311 having the positive electrode lead 312, the separator 315, and the negative electrode 313 having the negative electrode lead 314 are sequentially wound to form an electrode winding body 310 (S310).

It is wound in a cylindrical shape such that the separator 315 is positioned between the positive electrode 311, the negative electrode 313, and the positive electrode 311 and the negative electrode 313 around the core 316. In this case, a part of the positive electrode 311 and the negative electrode 313, that is, the electrode winding body 310 so that the positive electrode lead 312 and the negative electrode lead 314 may be separated from each other and extend on one side of the electrode winding body 310. A portion for forming the anode lead 312 and the cathode lead 314 is wound on one side of the image in a preformed state.

The terminal plate 330 is manufactured separately from the electrode winding body 310. (S320) The terminal plate 330 is a method of manufacturing the terminal plate 100 according to the fourth embodiment or a terminal plate according to the fifth embodiment ( 200 may be manufactured by the same method as the method of manufacturing a detailed description thereof will be omitted.

The electrode guiding body 310 is inserted into the container 320. (S330)

The electrode winding body 310 is inserted through the opening of the container 320 so that the core 316 is fixed to the protrusion formed at the center of the inner lower surface of the container 320. In this case, the positive lead 312 and the negative lead 314 of the electrode winding body 310 face the opening of the container 320.

The terminal plate 330 is bonded to the container 320 into which the electrode winding body 310 is inserted.

The terminal plate 330 is fixed to the container 320 such that the positive lead connecting portion and the negative lead connecting portion of the terminal plate 330 closely contact the positive lead 312 and the negative lead 314, respectively. The protruding portion of the center of the terminal plate 330 together with the protruding portion of the inner lower surface center portion of the container 320 fixes the core 316 of the electrode winding body 310 to form the anode lead 312 of the electrode winding body 310. ) And the negative electrode lead 314 are in close contact with the positive lead connecting portion and the negative lead connecting portion of the terminal plate 330, respectively.

The terminal plate 330 is bonded to the container 320 by welding the coupling member of the terminal plate 330 in a state where the terminal plate 330 is fixed to the container 320. Alternatively, the terminal plate 330 and the container 320 may be combined using a sealing means such as a rubber ring.

On the other hand, when the positive electrode lead 312 and the negative electrode lead 314 of the electrode winding body 310 and the positive electrode lead connecting portion and the negative electrode lead connecting portion of the terminal plate 330 in close contact with a conductive adhesive, the electrode winding body 310 After applying a conductive adhesive to the positive electrode lead 312 and the negative electrode lead 314 and inserting the electrode winding body 310 into the container 320, the positive lead connecting portion to the positive electrode lead 312, the negative electrode lead The connection part is in close contact with the negative electrode lead 314. Thereafter, the container 320 into which the electrode winding body 310 is inserted and the terminal plate 330 are joined using a sealing means such as welding or a rubber ring.

However, when the positive lead 312 and the negative lead 314 of the electrode winding body 310 and the positive lead connecting portion and the negative lead connecting portion of the terminal plate 330 are in close contact with each other by welding, the electrode winding body 310 Is coupled to the container 320 and the terminal plate 330 by using a sealing means such as welding or a rubber ring, and then the anode lead connection portion and the cathode lead connection portion of the terminal plate 330 by irradiating a laser from the outside And a cathode lead connecting portion, the anode lead 312, and the cathode lead 314, respectively.

As described above, according to a preferred embodiment of the present invention, a sealing member is provided between the positive electrode connecting plate and the coupling member and the negative electrode connecting plate and the coupling member in the manufacture of the terminal plate. Therefore, it is possible to prevent the electrolyte from leaking between the positive electrode connecting plate and the coupling member and the negative electrode connecting plate and the coupling member in the electrical energy storage device. Therefore, it is possible to suppress an increase in manufacturing cost due to a defective terminal plate or electrical energy storage device due to the leakage of the electrolyte.

In addition, by preventing the electrolyte leakage, it is possible to secure safety and external reliability of the terminal plate or the electrical energy storage device.

While the foregoing has been described with reference to preferred embodiments of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the invention as set forth in the claims below. It will be appreciated.

Claims (16)

A positive electrode connecting plate having a positive electrode connecting portion electrically connected to the positive electrode of the electrode for storing electrical energy and a positive electrode terminal facing the positive connecting portion; A negative electrode connecting plate having a negative electrode connecting portion electrically connected to the negative electrode of the electrode and a negative electrode terminal facing the negative connecting portion; A coupling member surrounding the positive electrode connecting plate and the negative electrode connecting plate to expose the connection parts and the terminals, and insulating the positive electrode connecting plate and the negative electrode connecting plate; And And a sealing member provided between the positive electrode connecting plate and the coupling member and between the negative electrode connecting plate and the coupling member, respectively. The method of claim 1, wherein the coupling member has a first receiving hole for accommodating the positive electrode connecting portion and the second receiving hole for accommodating the negative electrode connecting portion, and is coupled to one side of the positive electrode connecting plate and the negative electrode connecting plate First coupling member; And And a second coupling member having a third accommodating hole for accommodating the positive electrode terminal and a fourth accommodating hole for accommodating the negative electrode terminal, the second coupling member being coupled to the other side of the positive electrode connecting plate and the negative electrode connecting plate. Terminal board. 3. The terminal plate according to claim 2, wherein the first coupling member and the second coupling member are integrally formed. 4. The terminal plate according to claim 3, wherein the first coupling member and the second coupling member are welded by ultrasonic waves. The terminal plate according to claim 1, wherein the coupling member is formed by injection molding. 6. The terminal plate according to claim 5, wherein the sealing members are disposed along circumferences of the positive and negative connection plates, respectively. 7. The terminal plate according to claim 6, wherein each of the sealing members is injection molded. An electrode winding body in which an anode, a separator, and a cathode are sequentially wound and including an electrolyte solution provided between the anode and the cathode; A container accommodating the electrode winding body and having one side open; And An open side of the container is sealed, and an anode connecting plate having an anode connecting portion electrically connected to the cathode and an anode terminal opposite to the anode connecting portion, a cathode connecting portion electrically connected to the cathode of the electrode, and the cathode connecting portion. A negative electrode connecting plate having a negative electrode terminal opposite to the coupling member; a coupling member surrounding the positive electrode connecting plate and the negative electrode connecting plate to expose the connecting parts and the terminals, and insulating the positive electrode connecting plate and the negative electrode connecting plate; And a terminal plate including sealing members provided between the positive electrode connecting plate and the coupling member and between the negative electrode connecting plate and the coupling member, respectively. A positive electrode connecting plate having an anode connecting portion electrically connected to the positive electrode of the electrode for storing electrical energy and a positive electrode terminal facing the positive connecting portion, and a negative electrode connecting portion electrically connected to the negative electrode of the electrode and a negative electrode facing the negative connecting portion Preparing a negative electrode connecting plate having terminals; Disposing a first coupling member such that the positive electrode connecting portion is accommodated in the first receiving hole and the negative electrode connecting portion is received in the second receiving hole, respectively; Disposing a second coupling member such that the positive terminal is accommodated in the third accommodating hole and the negative terminal is respectively accommodated in the fourth accommodating hole; Disposing a sealing member between the positive electrode connecting plate and the first coupling member and between the negative electrode connecting plate and the first coupling member, respectively; And And combining the first coupling member and the second coupling member. The method of claim 9, wherein the first coupling member and the second coupling member are welded and joined by ultrasonic waves. A positive electrode connecting plate having an anode connecting portion electrically connected to the positive electrode of the electrode for storing electrical energy and a positive electrode terminal facing the positive connecting portion, and a negative electrode connecting portion electrically connected to the negative electrode of the electrode and a negative electrode facing the negative connecting portion Preparing a negative electrode connecting plate having terminals; Forming sealing members along circumferences of the positive and negative connection plates, respectively; And And forming a coupling member which insulates the positive electrode connecting plate and the negative electrode connecting plate to surround the positive electrode connecting plate and the negative electrode connecting plate to expose the connection parts and the terminals. 12. The method of claim 11, wherein the sealing member is formed by injection molding along the circumferences of the positive and negative connection plates, respectively. 12. The method of claim 11, wherein the coupling member is formed by injection molding. A cathode, a separator, and a cathode are sequentially wound to form an electrode winding by providing an electrolyte solution between the anode and the cathode; A positive electrode connecting plate having a positive electrode connecting portion electrically connected to the positive electrode and a positive electrode terminal facing the positive electrode connecting portion, a negative electrode connecting plate having a negative electrode connecting portion electrically connected to the negative electrode of the electrode and a negative electrode terminal facing the negative electrode connecting portion, Wrapping the positive electrode connecting plate and the negative electrode connecting plate to expose the connecting portions and the terminals, the coupling member for insulating the positive electrode connecting plate and the negative electrode connecting plate and between the positive electrode connecting plate and the coupling member and the negative electrode connecting plate and Forming a terminal plate using sealing members respectively provided between the coupling members; Inserting the electrode holder body into a container; And And connecting the terminal plate to the container so that the positive electrode connecting portion of the terminal plate is electrically connected to the positive electrode of the electrode winding body, and the negative electrode connecting portion of the terminal plate is electrically connected to the negative electrode of the electrode winding body, respectively. Method of manufacturing storage device. The method of claim 14, wherein the forming of the terminal plate, A positive electrode connecting plate having a positive electrode connecting portion electrically connected to the positive electrode and a positive electrode terminal facing the positive connecting portion, and a negative electrode connecting plate having a negative electrode connecting portion electrically connected to the negative electrode of the electrode and a negative terminal facing the negative electrode connecting portion; Preparing; Forming sealing members along circumferences of the positive and negative connection plates, respectively; And And forming a coupling member which insulates the positive electrode connecting plate and the negative electrode connecting plate so that the connection parts and the terminals are exposed. Manufacturing method. The method of claim 14, wherein the forming of the terminal plate, A positive electrode connecting plate having a positive electrode connecting portion electrically connected to the positive electrode and a positive electrode terminal facing the positive connecting portion, and a negative electrode connecting plate having a negative electrode connecting portion electrically connected to the negative electrode of the electrode and a negative terminal facing the negative electrode connecting portion; Preparing; Disposing a first coupling member such that the positive electrode connecting portion is accommodated in the first receiving hole and the negative electrode connecting portion is received in the second receiving hole, respectively; Disposing a second coupling member such that the positive terminal is accommodated in the third accommodating hole and the negative terminal is respectively accommodated in the fourth accommodating hole; Disposing a sealing member between the positive electrode connecting plate and the first coupling member and between the negative electrode connecting plate and the first coupling member, respectively; And And coupling the first coupling member and the second coupling member.

Images