KR100740568B1 - Improved method for manufacturing multi-layered electrode module and unit cell and multi-layered electrode module and unit cell manufactured by using the same - Google Patents

Abstract

A method for manufacturing a multi-layered electrode module is provided to increase productivity of multi-layered electrode modules, to decrease defective multi-layered electrode modules largely, and to reduce tact time remarkably. The method for manufacturing a multi-layered electrode module comprises the steps of: preparing a first multi-layered electrode module(210) having a first positive electrode withdrawal part(212) composed of many positive electrodes and a first negative electrode withdrawal part(214) composed of many negative electrodes, and a second multi-layered electrode module(220) having a second positive electrode withdrawal part(222) composed of many positive electrodes and a second negative electrode withdrawal part(224) composed of many negative electrodes; putting the first multi-layered electrode module(210) and the second multi-layered electrode module(220) into predetermined molds, respectively; and bending the first positive electrode withdrawal part(212) and the first negative electrode withdrawal part(214) up, bending the second positive electrode withdrawal part(222) and the second negative electrode withdrawal part(224) down, and forming a predetermined space(250) between the first positive electrode withdrawal part(212) and the second positive electrode withdrawal(222) and between the first negative electrode withdrawal part(214) and the second negative electrode withdrawal part(224).

Description

Improved method for manufacturing multi-layered electrode module and unit cell and multi-layered electrode module and unit cell manufactured by using the same

1A and 1B illustrate a method of manufacturing a multilayer electrode body according to the prior art.

2A to 2G illustrate a method of manufacturing a new multilayer electrode body and a unit cell according to an embodiment of the present invention.

The present invention relates to an improved method for manufacturing a multilayer electrode body and a unit cell, and a multilayer electrode body and a unit cell manufactured using the same. More specifically, the present invention provides a shorter time by separating the positive and negative electrodes of one multilayer electrode body and the positive and negative electrodes of the corresponding multilayer electrode body in a direction away from each other using a molding device and then performing a predetermined welding. The present invention relates to a multilayer electrode body and a unit cell manufacturing method for easily manufacturing a multilayer electrode body and a unit cell, and a multilayer electrode body and a unit cell manufactured using the same.

In general, secondary batteries such as nickel-metal hydride batteries are divided into a winding type or a stacking type, and the winding type is a multilayer electrode body using a jelly roll made by winding a cathode, a separator, and a cathode. The stacked type is used to form a multilayer electrode body made by stacking an anode, a nonwoven fabric, and a cathode in this order. In order to form such a multilayer electrode body, a plurality of anodes with lead portions, a plurality of cathodes with lead portions, and a nonwoven fabric to be inserted between the plurality of anodes and the plurality of cathodes are prepared. Thereafter, the plurality of anodes, the plurality of cathodes, and the plurality of nonwoven fabrics are stacked in the order of the anode, the nonwoven fabric, the cathode, or the cathode, the nonwoven fabric, and the anode, and then the anode lead portion and the cathode lead portion are respectively heated using heat from the top and the bottom thereof. The pressure welding completes the multilayer electrode body.

Typically, the multilayer electrode body of the prior art described above is welded by welding the positive electrode and the negative electrode of the multilayer electrode body using ultrasonic welding, spot welding, laser welding, arc welding or TIG (tungsten insert gas) welding. An electrode body was manufactured. In addition, an external connection terminal was connected to the multilayer electrode body to prepare a unit cell.

A method of manufacturing the above-described multilayer electrode body 100 of the prior art is specifically illustrated in FIG. 1. Referring to FIG. 1A, between a plurality of anodes 110, 130, 150, 170..., A plurality of cathodes 120, 140, 160, 180..., And a plurality of cathodes 110, 130, 150, 170..., And a plurality of cathodes 120, 140, 160, 180... The multilayer electrode body 100 is shown formed by stacking a plurality of nonwoven fabrics 115, 135, 155, ... inserted. In addition, referring to FIG. 1B, in the multilayer electrode body 100 illustrated in FIG. 1A, the anodes 110, 130, 150, 170... Are aligned with the anodes, and the cathodes 120, 140, 160, 180,. Then, in order to manufacture the unit cell which connected the above-mentioned multilayer electrode body 100 with an external connection terminal, the anode lead-out part 102 and the cathode lead-out part 106 were prescribed | regulated in the middle part of the multilayer electrode body 100. After opening in a direction away from each other using a bar 105, a positive electrode external connection terminal (not shown) is drawn between the first positive electrode lead-out portion 101 and the second positive electrode lead-out portion 103, and the first negative electrode lead-out portion. A negative electrode external connection terminal (not shown) is inserted between 107 and the second negative electrode drawing part 109, respectively, and then the positive electrode drawing parts 101 and 103 and the positive electrode connecting part and the negative electrode drawing parts 107 and 109 and the outside of the negative electrode are respectively inserted. Welding the connection terminals while pressing the positive and negative poles at the upper and lower portions of the lead portions 102 and 106 in the direction of the arrow using various welding methods such as the above-described ultrasonic welding, spot welding, laser welding, arc welding or tag welding. shall. In FIG. 1B, for the purpose of explanation, the intervals of the middle portions of the multilayer electrode body 100 are shown spaced apart, but in reality the intervals of the intermediate portions are equal to the intervals of the respective lead portions.

As described above, in order to connect the multilayer electrode body 100 with an external connection terminal, the anode lead-out part 102 and the cathode lead-out part 106 should be opened in a direction away from each other using the bar 105. However, the gap between the anodes of the anode lead-out portion 102 of the multi-layer electrode body 100 and the gap between the cathodes of the cathode lead-out portion 106 are very narrow, approximately 0.2 mm, and as a result, the bars 105 are anodes. It is not easy to simultaneously insert between the lead portion 102 and the cathode lead portion 106. Therefore, there exists a problem that the productivity of a multilayer electrode body and the unit cell which is a final product becomes remarkably low.

In addition, when the bar 105 is inserted between the anode lead-out portions 101 and 103 and the cathode lead-out portions 107 and 109, the contact between the bar 105 and the anode lead-out portions 101 and 103 and / or the cathode lead-out portions 107 and 109 Due to this, some of the anode lead-out portions 101 and 103 and / or the cathode lead-out portions 107 and 109 are bent, bent or broken in some cases, thus preventing the insertion of the bar 105, or between the anode lead-out portions 101 and 103 during welding and / or Some connection failures between the cathode lead-out portions 107 and 109 may occur, or some anode failure portions 101 and 103 and / or some connection between the cathode lead-out portions 107 and 109 and external connection terminals may occur, resulting in a failure of the unit cell as a final product. There is a possibility.

Furthermore, there has been a problem in that the overall manufacturing process time (tact time) of the product is considerably long due to the above-described problems.

The present invention manufactures a multilayer electrode body to be connected to an external connection terminal with two first multilayer electrode bodies and a second multilayer electrode body, wherein the first anode lead portion and the first cathode lead portion of the first multilayer electrode body are in the first direction and The second anode lead portion and the second cathode lead portion of the second multilayer electrode body are molded to bend in a second direction away from the first direction, and then the first anode lead portion and the second multilayer electrode body of the first multilayer electrode body are formed. A positive electrode external connection terminal is welded and connected between the 2nd positive electrode lead-out of the said, and a negative electrode external connection terminal is welded between the 1st negative electrode lead part of a 1st multilayer electrode body, and the 2nd negative electrode lead part of a 2nd multilayer electrode body to weld. This is for solving the above-described problems of the prior art.

More specifically, the first feature of the present invention is a method of manufacturing a multilayer electrode body, the first multilayer electrode having a first anode lead portion consisting of a plurality of anodes and a first cathode lead portion composed of a plurality of cathodes Preparing a second multilayer electrode body having a sieve, a second anode withdrawing portion consisting of a plurality of anodes and a second cathode drawing portion consisting of a plurality of cathodes; Inserting the first multilayer electrode body and the second multilayer electrode body into a predetermined molding apparatus, respectively; And bending the first positive electrode drawing part and the first negative electrode drawing part in a first direction, and causing the second positive electrode drawing part and the second negative electrode drawing part to be bent in a second direction away from the first direction. It is to provide a method for producing a multi-layer electrode body comprising the step of forming a predetermined space between the first anode lead portion and the second anode lead portion and between the first cathode lead portion and the second cathode lead portion.

According to a second aspect of the present invention, there is provided a method of manufacturing a unit cell, comprising: a) a first multilayer electrode body having a plurality of positive electrodes and a plurality of positive electrodes; Preparing a second multilayer electrode body having a second anode lead portion consisting of and a second cathode lead portion consisting of a plurality of cathodes; b) inserting the first multi-layer electrode body and the second multi-layer electrode body into a predetermined molding apparatus, respectively; c) bending the first positive electrode drawing part and the first negative electrode drawing part in a first direction, and causing the second positive electrode drawing part and the second negative electrode drawing part to be bent in a second direction away from the first direction, Forming a predetermined space between the first cathode lead portion and the second anode lead portion and between the first cathode lead portion and the second cathode lead portion; d) arranging the first multi-layer electrode body and the second multi-layer electrode body in a vertical direction, and then fixing the first multi-layer electrode body and the second multi-layer electrode body to be aligned with each other using a predetermined fixing device. step; e) planarizing the inclined portions of the end portions of the first anode lead-out portion and the first cathode lead-out portion and the inclined portions of the end portions of the second anode lead-out portion and the second cathode lead-out portion by welding; f) the positive electrode external connection terminal and the negative electrode respectively in the predetermined space formed between the first positive electrode lead-out portion and the second positive electrode lead-out portion and the predetermined space formed between the first negative electrode lead-out portion and the second negative electrode lead-out portion; Inserting an external connection terminal; And g) connecting the first positive electrode lead-out part and the second positive electrode lead-out part and the positive electrode external contact terminal, and the first negative electrode lead-out part and the second negative electrode lead-out part to the negative electrode external contact terminal. It is for providing a unit cell manufacturing method.

According to a third aspect of the present invention, there is provided a multi-layered electrode body comprising: a first multilayer electrode body having a first anode withdrawing portion made up of a plurality of anodes and a first cathode withdrawing portion made up of a plurality of cathodes; And a second multilayer electrode body having a second anode withdrawing portion consisting of a plurality of anodes and a second cathode drawing portion consisting of a plurality of cathodes, between the first anode drawing portion and the second anode drawing portion, and between the second anode drawing portion. The first cathode lead portion and the first cathode lead portion are formed in a first direction by a predetermined molding apparatus so that a predetermined space is formed between the first cathode lead portion and the second cathode lead portion, respectively, to accommodate an external connection terminal. It is for providing the multilayer electrode body which bends, and the said 2nd positive electrode lead-out part and the said 2nd negative electrode lead-out part are bent in the 2nd direction away from the said 1st direction by the said predetermined shaping | molding apparatus.

According to a fourth aspect of the present invention, there is provided a unit cell comprising: a first multi-layer electrode body having a first anode lead portion formed of a plurality of anodes and a first cathode lead portion composed of a plurality of cathodes; A second multilayer electrode body having a second anode withdrawing portion consisting of a plurality of anodes and a second cathode drawing portion consisting of a plurality of cathodes; And an anode external connection terminal and a cathode connection terminal, wherein an external connection terminal is accommodated between the first positive electrode lead-out part and the second positive electrode lead-out part and between the first negative electrode lead-out part and the second negative electrode lead-out part, respectively. The first positive electrode lead-out portion and the first negative electrode lead-out portion are bent in a first direction by a predetermined molding apparatus so that a predetermined space is formed, and the second positive lead portion and the second negative electrode lead-out portion are Bent in a second direction away from the first direction by a molding apparatus, wherein the first multilayer electrode body and the second multilayer electrode body are fixed by a predetermined fixing device to maintain alignment with each other, and the first anode The inclined portion of the lead portion and the end portion of the first cathode lead portion and the inclined portion of the end portion of the second anode lead portion and the second cathode lead portion are flattened by welding, The external positive connection terminal and the external external cathode in the predetermined space formed between the first positive electrode lead-out part and the second positive electrode lead-out part and the predetermined space formed between the first negative electrode lead-out part and the second negative electrode lead-out part, respectively. A connection terminal is inserted, wherein the first positive electrode lead-out part and the second positive electrode lead-out part are connected to the positive electrode external contact terminal, and the first negative electrode lead-out part and the second negative electrode lead-out part are connected to the negative electrode external contact terminal; To provide a cell.

Further advantages of the present invention will become apparent from the following description with reference to the accompanying drawings in which like or like reference numerals designate like elements.

Hereinafter, the present invention will be described with reference to embodiments and drawings of the present invention.

2A to 2G illustrate a method of manufacturing a new multilayer electrode body and a unit cell according to an embodiment of the present invention.

Referring to FIG. 2A, unlike the prior art, the multilayer electrode body 200 is separately manufactured by two first multilayer electrode bodies 210 and a second multilayer electrode body 220. The first multilayer electrode body 210 includes a first anode lead portion 212 and a first cathode lead portion 214, and the second multilayer electrode body 220 includes a second anode lead portion 222 and a second electrode. A cathode lead portion 224 is provided.

Referring to FIG. 2B, the first anode lead portion 212 and the first cathode lead portion 214 of the first multilayer electrode body 210 manufactured in FIG. 2A may be connected to the upper mold 230 and the lower mold 240. It is inserted to the left side (X direction) of the shaping | molding apparatus comprised, and the 2nd positive electrode drawing part 222 and the 2nd negative electrode drawing part 224 of the 2nd multilayer electrode body 220 are directed to the right side (Y direction) of a shaping | molding apparatus. Is inserted. In the molding apparatus shown in FIG. 2B, the left side L of the upper mold 230 has a concave groove portion 232, the right side R has a convex protrusion portion 234, and the left side of the lower mold 240. It is shown that L has a convex protrusion 242, and right side R has a concave groove 234. However, the molding apparatus shown in Fig. 2b is exemplary and those skilled in the art will appreciate that the left side L of the upper mold 230 has a convex protrusion in the molding apparatus used in the embodiment of the present invention shown in Fig. 2b, The right side R may have a concave groove, the left side L of the lower mold 240 may have a concave groove, the right side R may have a convex protrusion, and the flat portions 236 and 246 as necessary. It will be understood that the concave groove portion 232 and the convex protrusion portion 234 of the upper mold 230 and the convex protrusion portion 242 and the concave groove portion 234 of the lower mold 240 may be formed adjacent to each other. will be. In addition, the person skilled in the art, the upper mold 230 and the lower mold 240 of the present invention is separated from the left (L) and the right (R) portion of the first upper mold 230 and the lower mold 240 consisting of a first It will be appreciated that it is also possible to consist of two shaping devices of a shaping device and a second shaping device consisting of the right upper mold 230 and the lower mold 240. In this case, the first anode drawing part 212 and the first cathode drawing part 214 are inserted into any one of the first molding device and the second molding device, and the second anode drawing of the second multilayer electrode body 220 is carried out. Obviously, the portion 222 and the second cathode lead portion 224 are inserted into the other of the first molding apparatus and the second molding apparatus.

Referring again to FIG. 2B, the first anode lead portion 212 and the first cathode lead portion 214 of the first multilayer electrode body 210 are positioned on the convex protrusion 242 of the lower mold 240. The second anode lead portion 222 and the second cathode lead portion 224 of the second multilayer electrode body 220 are positioned on the concave groove portion 244 of the lower mold 240. Thereafter, when the upper mold 230 and the lower mold 240 are pressurized with each other, the first anode lead portion 212 and the first cathode lead portion 214 of the first multilayer electrode body 210 are bent upward. The second cathode lead portion 222 and the second cathode lead portion 224 of the second multilayer electrode body 220 are bent downward.

FIG. 2C is a side sectional view in which the first multilayer electrode body 210 and the second multilayer electrode body 220 are formed by the molding apparatus shown in FIG. 2B and arranged to face each other. As can be seen in FIG. 2C, the first anode lead portion 212 and the first cathode lead portion 214 of the first multilayer electrode body 210 are bent in an upward direction as a whole, and the second multilayer electrode body 220 is rotated. ), The second cathode lead portion 222 and the second cathode lead portion 224 are bent downward. As a result, a predetermined space for accommodating an external connection terminal between the first anode lead portion 212 and the second anode lead portion 222 and between the first cathode lead portion 214 and the second cathode lead portion 224. 250 is formed. In addition, edges of the first cathode lead 212 and the first cathode lead 214, and the edges of the second anode lead 222 and the second cathode lead 224, respectively, are outside. Has a slope in the direction. In FIG. 2C, the first anode lead-out unit 212, the first cathode lead-out unit 214, the second cathode lead-out unit 222, and the second cathode lead-out unit 224 overlap each other and are illustrated as one lead-out unit. It should be noted that

FIG. 2D shows that the first multilayer electrode body 210 and the second multilayer electrode body 220 shown in FIG. 2C are arranged in a vertical direction, and then these electrode bodies 210 and 220 are aligned with each other using a conventional tape 260. The figure which shows the vertical side cross section which fixed to maintain the state. The tape 260 shown in FIG. 2D is exemplary, and a person skilled in the art can clamp or clip the pins in addition to the tape 260 as a means for fixing the first multilayer electrode body 210 and the second multilayer electrode body 220 of the present invention. It will be appreciated that fastening means, such as a clipper, may be used.

FIG. 2E shows the inclined portions of the ends of the first anode lead portions 212 and the first cathode lead portions 214 of the multilayer electrode bodies 210 and 220 illustrated in FIG. 2C, and the second anode lead portions 222 and the second cathodes. It is a figure which shows planarization of the inclined part of the edge part of the lead-out part 224 by welding. That is, the inclined portions of the ends of the first anode lead-out portion 212 and the first cathode lead-out portion 214 and the ends of the second anode lead-out portion 222 and the second cathode lead-out portion 224 shown in FIG. 2C. The inclined part shall be removed for secure connection with external connection terminals. Removal of this inclined portion is made by a predetermined welding device 270. The welding apparatus 270 of the present invention may be any one of an ultrasonic welding apparatus, a spot welding apparatus, a laser welding apparatus, an arc welding apparatus, or a tag welding apparatus used in the prior art. The welding method according to the embodiment of the present invention is most preferably non-contact laser welding. In addition, the welding is performed at four positions (that is, the inclined portions of the ends of the first anode lead-out portion 212 and the first cathode lead-out portion 214 and the second anode lead-out portion 222 and the second cathode lead-out portion 224. Slanted portion of the end of the Therefore, the welding of the end slanted portion of the present invention 1) using the one welding device 270, the inclined portion of the end of the first anode lead portion 212 and the first cathode lead portion 214 and the second anode lead out A method of sequentially welding one of the inclined portions of the end of the portion 222 and the second cathode lead portion 224 first, and then sequentially welding the other; 2) the inclined portion of the end portions of the first anode lead-out portion 212 and the first cathode lead-out portion 214 and the second anode lead-out portion 222 and the second cathode lead-out portion 224 using two welding apparatuses; A method of welding each of the inclined portions of the ends sequentially and simultaneously; And 3) an inclined portion of the ends of the first anode lead-out portion 212 and the first cathode lead-out portion 214 and the second anode lead-out portion 222 and the second cathode lead-out portion 224 using four welding apparatuses. Any one of the methods of simultaneously welding the inclined portions of the ends of can be used. In addition, in order to prevent the formation of an oxide film on the welding surface during welding, it is preferable to maintain the inert atmosphere by providing nitrogen gas (N ₂ ) through the nozzle.

FIG. 2F is a side cross-sectional view illustrating the insertion of the external connection terminal 280 into the predetermined space 250 between the planarized electrode lead portions 212,222; 214,224. Although only one external connection terminal 280 is shown in FIG. 2F, those of ordinary skill in the art will appreciate that the anode external connection end has a first negative electrode lead in the empty space between the first positive electrode lead-out portion 212 and the second positive electrode lead-out portion 222. It will be fully understood that a negative external connection terminal should be connected to a predetermined space between the portion 214 and the second negative lead portion 224. In addition, the insertion of the external connection terminal 280 into the predetermined space 250 may be performed using, for example, a robot arm (not shown).

FIG. 2G shows that the lower terminals 282, 284 of the external connection terminals 280 inserted into the predetermined spaces 250 between the electrode leads 212, 222; 214, 224 and the electrode leads 212, 222; 214, 224 by welding. It is a side cross-sectional view shown. Welding between the lower terminals 282 and 284 and the electrode lead-out portions 212,222 and 214 and 224 shown in FIG. 2G is performed under a nitrogen atmosphere after the multilayer electrode bodies 210 and 220 are clamped by clamps or tongs (not shown) in the left and right directions, respectively. This is done by welding the outer surface of each of the electrode lead-out portions 212,222; 214,224. In this case, the welding method is the same as the welding method described with reference to FIG. 2E.

Specific multi-layered electrode body and unit cell manufacturing method of the present invention described with reference to FIGS. 2A to 2G described above are as follows.

Step 1: a first multi-layer electrode body having a first anode withdrawal portion consisting of a plurality of anodes and a first cathode withdrawing portion consisting of a plurality of cathodes, a second anode withdrawing portion consisting of a plurality of anodes and a plurality of cathodes The 2nd multilayer electrode body provided with the 2nd cathode lead-out part is prepared.

Step 2: The first multilayer electrode body and the second multilayer electrode body are respectively inserted into a predetermined molding apparatus.

Step 3: bend the first positive electrode lead-out portion and the first negative electrode lead-out portion in a first direction, and bend the second positive lead portion and the second negative electrode lead-out portion in a second direction away from the first direction Thus, a predetermined space is formed between the first cathode lead portion and the second anode lead portion and between the first cathode lead portion and the second cathode lead portion.

Step 4: Arranging the first multi-layer electrode body and the second multi-layer electrode body in a vertical direction, and then using the predetermined fixing device to keep the first multi-layer electrode body and the second multi-layer electrode body aligned with each other. Fix it.

Step 5: Flatten the inclined portions of the ends of the first anode lead-out portion and the first cathode lead-out portion and the inclined portions of the ends of the second anode lead-out portion and the second cathode lead-out portion by welding.

Step 6: outside the anode in the predetermined space formed between the first anode lead and the second anode lead and the predetermined space formed between the first cathode lead and the second cathode lead, respectively. Insert the connection terminal and the negative external connection terminal.

Step 7: simultaneously welding the outer side surfaces of the first and second cathode lead-out portions and the outer side surfaces of the first and second cathode lead-out portions and the second cathode lead-out portion, simultaneously or sequentially The second positive electrode lead-out portion and the positive electrode external connective terminal, and the first negative lead-out portion and the second negative lead-out portion and the negative electrode external connective terminal are simultaneously or sequentially connected.

According to the improved multilayer electrode body and unit cell manufacturing method of the present invention described above, the multilayer electrode body is made of two multilayer electrode bodies, and then one of the anode lead-out and the cathode lead-out and the other of the anode lead-out and The cathode lead-out portion is molded to bend in a direction away from each other by using a molding apparatus, and then the external connection terminals are connected by welding, thereby connecting the first cathode lead-out portion of the electrode body and the second cathode lead-out portion of the second multilayer electrode body. By connecting the negative electrode external connection terminal by welding, a poor connection between some positive electrode lead-out and / or some negative electrode lead-out part and the external connection terminal is prevented, and thus the occurrence rate of the defective unit cell which is the final product is remarkably reduced, and the whole manufacture The tact time is significantly reduced.

When the improved multilayer electrode body and the unit cell manufacturing method of the present invention are used, the following effects are achieved.

1. Compared with the prior art, the productivity of the multi-layer electrode body and the final unit cell is significantly increased.

2. The possibility of failure of the multilayer electrode body and the unit cell as the final product is significantly reduced.

3. The overall manufacturing process time of the multilayer electrode body and the final cell as a final product is significantly reduced.

As various modifications may be made to the constructions and methods described and illustrated herein without departing from the scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawings be exemplary, and not intended to limit the invention. It is not. Therefore, the scope of the present invention should not be limited by the above-described exemplary embodiments, but should be defined only in accordance with the following claims and their equivalents.

Claims (22)

In the method of manufacturing a multilayer electrode body, The first multi-layer electrode body having a first positive electrode drawing portion consisting of a plurality of anodes and the first negative electrode drawing portion consisting of a plurality of cathodes, the second positive electrode drawing portion consisting of a plurality of anodes and the second negative electrode drawing portion consisting of a plurality of cathodes Preparing a second multilayer electrode body; Inserting the first multilayer electrode body and the second multilayer electrode body into a predetermined molding apparatus, respectively; And The first positive electrode lead-out portion and the first negative electrode lead-out portion may be bent in a first direction, and the second positive electrode lead portion and the second negative electrode lead-out portion may be bent in a second direction away from the first direction. 1) forming a predetermined space between the anode lead portion and the second anode lead portion and between the first cathode lead portion and the second cathode lead portion; Multi-layer electrode body manufacturing method comprising a. The method of claim 1, The forming apparatus is composed of an upper mold and a lower mold, wherein the upper mold has a concave groove portion and a convex protrusion portion therein, and the lower mold corresponds to the concave groove portion and the convex protrusion portion of the upper mold, respectively, on the inner side. The manufacturing method of the multilayer electrode body provided with the convex protrusion part and the recessed groove part. In the method of manufacturing a unit cell, a) a first multi-layer electrode body having a first positive electrode drawing part consisting of a plurality of positive electrodes and a first negative electrode drawing part consisting of a plurality of negative electrodes, a second positive electrode drawing part consisting of a plurality of positive electrodes and a second negative electrode consisting of a plurality of negative electrodes Preparing a second multilayer electrode body having a lead-out unit; b) inserting the first multi-layer electrode body and the second multi-layer electrode body into a predetermined molding apparatus, respectively; c) bending the first positive electrode drawing part and the first negative electrode drawing part in a first direction, and causing the second positive electrode drawing part and the second negative electrode drawing part to be bent in a second direction away from the first direction, Forming a predetermined space between the first cathode lead portion and the second anode lead portion and between the first cathode lead portion and the second cathode lead portion; d) arranging the first multi-layer electrode body and the second multi-layer electrode body in a vertical direction, and then fixing the first multi-layer electrode body and the second multi-layer electrode body to be aligned with each other using a predetermined fixing device. step; e) planarizing the inclined portions of the end portions of the first anode lead-out portion and the first cathode lead-out portion and the inclined portions of the end portions of the second anode lead-out portion and the second cathode lead-out portion by welding; f) the positive electrode external connection terminal and the negative electrode respectively in the predetermined space formed between the first positive electrode lead-out portion and the second positive electrode lead-out portion and the predetermined space formed between the first negative electrode lead-out portion and the second negative electrode lead-out portion; Inserting an external connection terminal; And g) connecting the first positive electrode lead-out part and the second positive electrode lead-out part and the positive electrode external contact terminal, and the first negative electrode lead-out part and the second negative electrode lead-out part to the negative electrode external contact terminal; Unit cell manufacturing method comprising a. The method of claim 3, wherein The planarization step may be performed using any one of: 1) an inclined portion of an end portion of the first anode lead-out portion and the first cathode lead-out portion, and an inclined portion of an end portion of the second anode lead-out portion and the second cathode lead-out portion using one welding device; First welding one sequentially and then sequentially welding the other; 2) sequentially welding the inclined portions of the end portions of the first anode lead-out portion and the first cathode lead-out portion and the inclined portions of the end portions of the second anode lead-out portion and the second cathode lead-out portion using two welding apparatuses at the same time; How to; And 3) simultaneously welding the inclined portions of the end portions of the first anode lead-out portion and the first cathode lead-out portion and the inclined portions of the ends of the second anode lead-out portion and the second cathode lead-out portion using four welding apparatuses, respectively. A unit cell manufacturing method performed by any of the methods. The method according to claim 3 or 4, And the connecting step is performed by welding the outer side surfaces of the first and second anode lead-out portions and the outer side surfaces of the first and second cathode lead-out portions simultaneously or sequentially. The method of claim 4, wherein The welding method is any one of ultrasonic welding, spot welding, laser welding, arc welding, and tag welding. The method of claim 5, And the welding is any one of ultrasonic welding, spot welding, laser welding, arc welding, and tag welding. The method according to claim 3 or 4, The forming apparatus is composed of an upper mold and a lower mold, wherein the upper mold has a concave groove portion and a convex protrusion portion therein, and the lower mold corresponds to the concave groove portion and the convex protrusion portion of the upper mold, respectively, on the inner side. A unit cell manufacturing method comprising a convex protrusion and a concave groove. The method of claim 5, The forming apparatus is composed of an upper mold and a lower mold, wherein the upper mold has a concave groove portion and a convex protrusion portion therein, and the lower mold corresponds to the concave groove portion and the convex protrusion portion of the upper mold, respectively, on the inner side. A unit cell manufacturing method comprising a convex protrusion and a concave groove. The method of claim 6, The forming apparatus is composed of an upper mold and a lower mold, wherein the upper mold has a concave groove portion and a convex protrusion portion therein, and the lower mold corresponds to the concave groove portion and the convex protrusion portion of the upper mold, respectively, on the inner side. A unit cell manufacturing method comprising a convex protrusion and a concave groove. The method of claim 7, wherein The forming apparatus is composed of an upper mold and a lower mold, wherein the upper mold has a concave groove portion and a convex protrusion portion therein, and the lower mold corresponds to the concave groove portion and the convex protrusion portion of the upper mold, respectively, on the inner side. A unit cell manufacturing method comprising a convex protrusion and a concave groove. In the multilayer electrode body, A first multilayer electrode body having a first anode withdrawal portion composed of a plurality of anodes and a first cathode withdrawal portion composed of a plurality of cathodes; And A second multilayer electrode body having a second anode lead portion consisting of a plurality of anodes and a second cathode lead portion composed of a plurality of cathodes Including, The first positive electrode lead-out unit is formed such that a predetermined space is formed between the first positive electrode lead-out unit and the second positive electrode lead-out unit and between the first negative electrode lead-out unit and the second negative electrode lead-out unit, respectively. And the first cathode lead-out portion is bent in a first direction by a predetermined molding apparatus, and the second anode lead-out portion and the second cathode lead-out portion are separated from the first direction by the predetermined molding apparatus. Bent Multilayer electrode body. The method of claim 12, The forming apparatus is composed of an upper mold and a lower mold, The upper mold has a concave groove portion and a convex protrusion portion therein, The lower mold has a convex protrusion and a concave groove portion respectively corresponding to the concave groove portion and the convex protrusion portion of the upper mold. Multilayer electrode body. In the unit cell, A first multilayer electrode body having a first anode withdrawal portion composed of a plurality of anodes and a first cathode withdrawal portion composed of a plurality of cathodes; A second multilayer electrode body having a second anode withdrawing portion consisting of a plurality of anodes and a second cathode drawing portion consisting of a plurality of cathodes; And Positive external connection terminal and negative connection terminal Including, The first positive electrode lead-out unit is formed such that a predetermined space is formed between the first positive electrode lead-out unit and the second positive electrode lead-out unit and between the first negative electrode lead-out unit and the second negative electrode lead-out unit, respectively. And the first cathode lead-out portion is bent in a first direction by a predetermined molding apparatus, and the second anode lead-out portion and the second cathode lead-out portion are separated from the first direction by the predetermined molding apparatus. Bent to The first multi-layer electrode body and the second multi-layer electrode body are fixed by a predetermined fixing device to keep the alignment state with each other, Inclined portions of the end portions of the first anode lead portion and the first cathode lead portion and inclined portions of the end portions of the second anode lead portion and the second cathode lead portion are flattened by welding, The positive electrode external connection terminal and the negative electrode respectively in the predetermined space formed between the first positive electrode lead-out portion and the second positive electrode lead-out portion and the predetermined space formed between the first negative electrode lead-out portion and the second negative electrode lead-out portion. External connection terminal is inserted The first positive electrode lead-out part and the second positive electrode lead-out part are connected to the positive electrode external connection terminal, and the first negative electrode lead-out part and the second negative electrode lead-out part are connected to the negative electrode external connection terminal. Unit cell. The method of claim 14, The planarization may be performed using any one of: 1) an inclined portion of an end portion of the first anode lead-out portion and the first cathode lead-out portion, and an inclined portion of an end portion of the second anode lead-out portion and the second cathode lead-out portion using one welding device; First welding sequentially and then sequentially welding the other one; 2) sequentially welding the inclined portions of the end portions of the first anode lead-out portion and the first cathode lead-out portion and the inclined portions of the end portions of the second anode lead-out portion and the second cathode lead-out portion using two welding apparatuses at the same time; How to; And 3) simultaneously welding the inclined portions of the end portions of the first anode lead-out portion and the first cathode lead-out portion and the inclined portions of the ends of the second anode lead-out portion and the second cathode lead-out portion using four welding apparatuses, respectively. Unit cell performed by any of the methods. The method according to claim 14 or 15, And the connection is performed by welding the outer side surfaces of the first and second anode lead-out portions and the outer side surfaces of the first and second cathode lead-out portions simultaneously or sequentially. The method of claim 15, The welding method is any one of ultrasonic welding, spot welding, laser welding, arc welding, and tag welding. The method of claim 16, And the welding is any one of ultrasonic welding, spot welding, laser welding, arc welding, and tig welding. The method according to claim 14 or 15, The forming apparatus is composed of an upper mold and a lower mold, wherein the upper mold has a concave groove portion and a convex protrusion portion therein, and the lower mold corresponds to the concave groove portion and the convex protrusion portion of the upper mold, respectively, on the inner side. A unit cell having convex protrusions and concave grooves. The method of claim 16, The forming apparatus is composed of an upper mold and a lower mold, wherein the upper mold has a concave groove portion and a convex protrusion portion therein, and the lower mold corresponds to the concave groove portion and the convex protrusion portion of the upper mold, respectively, on the inner side. A unit cell having convex protrusions and concave grooves. The method of claim 17, The forming apparatus is composed of an upper mold and a lower mold, wherein the upper mold has a concave groove portion and a convex protrusion portion therein, and the lower mold corresponds to the concave groove portion and the convex protrusion portion of the upper mold, respectively, on the inner side. A unit cell having convex protrusions and concave grooves. The method of claim 18, The forming apparatus is composed of an upper mold and a lower mold, wherein the upper mold has a concave groove portion and a convex protrusion portion therein, and the lower mold corresponds to the concave groove portion and the convex protrusion portion of the upper mold, respectively, on the inner side. A unit cell having convex protrusions and concave grooves.

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