JP2021158030A - Bus bar for laminate cell stack - Google Patents

Abstract

To provide a bus bar capable of easily performing electrical connection between electrode terminals of laminate cells in a laminate cell stack by reducing the number of components and a working process.SOLUTION: A bus bar 1A is configured by comprising a first polarity electrode connection part 11A, a second polarity electrode connection part 12A and an electrode coupling part 13A. In the first polarity electrode connection part 11A, a plurality of first end plate parts 11A1 and first external connection terminals 11A2 which are electrically connected with each other are provided integrally. Each of the first end plate parts 11A1 is provided in a same arrangement pitch as first polarity electrode terminals 3a of each of laminate cells 3 and respectively includes a face in parallel with mutually parallel electrode surfaces of the first polarity electrode terminal 3a. The second polarity electrode connection part 12A is formed into a shape obtained by laterally mirror-inverting the first polarity electrode connection part 11A. The electrode coupling part 13A is provided between the first polarity electrode connection part 11A and the second polarity electrode connection part 12A, couples and integrates them.SELECTED DRAWING: Figure 4

Description

The present invention relates to a bus bar for a laminated cell laminate used for connecting each electrode of the laminated cells to each other in a laminated cell laminate provided by stacking a plurality of laminated cells.

Conventionally, as a bus bar of this type, for example, there is one used for a laminated cell laminated body in a laminated cell integrated battery disclosed in Patent Document 1.

The laminated cell laminate is formed so that adjacent electrode terminals of the same polarity of each laminate cell project. Each electrode terminal has an extension made of nickel connected to a base made of aluminum by ultrasonic welding. The extension portion is bent in the vicinity of the tip thereof at a substantially right angle to the crank shape. On the other hand, the bus bar is formed with a terminal insertion hole through which an extension portion of the electrode terminal formed in each laminated cell is passed. As for the extension portion of the electrode terminal inserted into the terminal insertion hole of the bus bar, the portion protruding from the terminal insertion hole is bent. A hook piece insertion hole is also formed in the bus bar. A hook portion formed downward through the terminal connection plate is inserted into the hook piece insertion hole, and the terminal connection plate is superposed on the bus bar. The terminal connection plate is curved downward in a convex shape at the center in order to keep the contact resistance between the bus bar and the bent portion of the electrode terminal constant.

JP-A-2007-265945

In the above-mentioned conventional bus bar, in order to obtain stable contact with the electrode terminals of each laminated cell, the extension portion bent in a crank shape is welded to the electrode terminals as described above, and the terminals are connected on the electrode terminals. The plates need to be overlapped. Therefore, in order to connect the electrode terminals of the laminated cells to each other using the conventional bus bar, the number of parts is required and many work steps are required.

The present invention has been made to solve such a problem.
The laminated cells are arranged at the same pitch as the arrangement pitch of the first polar electrode terminals of the laminated cells that are stacked at predetermined intervals, and have a surface parallel to each electrode surface parallel to each other of the first polar electrode terminals. A plurality of first end plate portions and first external connection terminals provided electrically conductively on each of the first end plate portions and led out to the side portions of the laminated cell laminate are integrally provided. 1st polar electrode connection and
A plurality of electrodes arranged at the same pitch as the arrangement pitch of the second polar electrode terminals provided in each laminated cell along with the first polar electrode terminals, and having surfaces parallel to each electrode surface of the second polar electrode terminals. A second end plate portion and a second external connection terminal provided electrically conductively on each of the second end plate portions and led out to the side portion of the laminated cell laminate are integrally provided. Polar electrode connection and
It is made of an electrically insulating resin provided between the first polar electrode connection portion and the second polar electrode connection portion and connecting and integrating the first polar electrode connection portion and the second polar electrode connection portion. A bus bar for a laminated cell laminate was provided with an electrode connecting portion.

According to this configuration, each of the plurality of first end plate portions parallel to each other in the first polar electrode connection portion is brought into contact with each of the parallel electrode surfaces of the first polar electrode terminals parallel to them. Each surface of the plurality of second end plate portions parallel to each other in the second polar electrode connection portion is brought into contact with each of the electrode surfaces parallel to each other of the second polar electrode terminals parallel to them, and the first end plate portion and the first end plate portion are formed. By welding each contact surface with the first polar electrode terminal and each contact surface between the second end plate portion and the second polar electrode terminal, each first end plate portion of the first polar electrode connection portion is formed. Is electrically connected to each of the first polar electrode terminals, and each second end plate portion of the second polar electrode connection portion is electrically connected to each second polar electrode terminal. On the other hand, the first polar electrode connecting portion and the second polar electrode connecting portion are integrally formed by an electrode connecting portion provided between them. Therefore, the first electrode terminals and the second electrode terminals of each laminate cell constituting the laminate cell laminate are electrically connected to each other only by performing welding work using one bus bar component according to this configuration. NS. Therefore, the number of parts and the work process required to connect the electrode terminals of each laminate cell constituting the laminate cell laminate to each other are reduced, and the electrical connection between the electrode terminals of each laminate cell is easily performed. You will be able to do it.

Further, the present invention is characterized in that both the first external connection terminal and the second external connection terminal are provided so as to project from one side surface of the electrode connecting portion. Further, one of the first external connection terminal and the second external connection terminal is provided so as to project from one side surface of the electrode connecting portion and the other project to the other side surface of the electrode connecting portion.

According to these configurations, by selecting the bus bar to be used, the arrangement positions of the first external connection terminal and the second external connection terminal led out to the side portion of the laminated cell laminate with respect to the electrode connection portion can be selected. Can be done. Therefore, it is possible to select the electrical connection mode between the first external connection terminal and the second external connection terminal between a certain laminated cell laminate and another laminated cell laminate according to the connection environment. Therefore, the electrical connection between the laminated cells can be easily performed according to the connection environment.

Further, in the present invention, each laminated cell is placed on a frame in the laminated cell laminate, and the electrode connecting portion is a first polar electrode with a gap on both sides for accommodating the first end plate portion and the second end plate portion. It is placed on a frame piece of a frame interposed between the terminal and the second polar electrode terminal, and is formed to have a thickness smaller than the arrangement interval of the frame pieces between adjacent frames.

According to this configuration, since the electrode connection part is mounted on the frame pieces of the frame, the bus bar is adapted to be supported on the frame, the arrangement position of the bus bar is fixed. Therefore, the electrical connection between the electrode terminals of each laminated cell is stably maintained.

According to the present invention, it is possible to provide a bus bar in which the number of parts and the work process are reduced, and electrical connection between the electrode terminals of each laminated cell in the laminated cell integrated body can be easily performed.

It is a perspective view of the laminated cell laminated body in which the electrode terminals are connected to each other by using the bus bar for the laminated cell laminated body according to the 1st Embodiment of this invention. (A) is a schematic configuration diagram of one laminated cell, and (b) is a schematic configuration diagram of a laminated cell laminate. It is a perspective view which shows the state which the bus bar was removed from the laminated cell laminated body shown in FIG. 1 to the front side. (A) is a perspective view of the bus bar for the laminated cell laminate according to the first embodiment, and (b) is a first polar electrode connection portion constituting the bus bar for the laminated cell laminate according to the first embodiment. It is a perspective view. (A) is a front view of the bus bar for a laminated cell laminate according to the first embodiment, (b) is a plan view, and (c) is a left side view. (A) is a front view of the first polar electrode connection portion constituting the bus bar for the laminated cell laminate according to the first embodiment, (b) is a plan view, (c) is a left side view, and (d) is a right side view. It is a plan view. (A) is a perspective view of the bus bar for the laminated cell laminate according to the second embodiment of the present invention, and (b) is the first polar electrode constituting the bus bar for the laminated cell laminate according to the second embodiment. It is a perspective view of the connection part. (A) is a front view of the bus bar for a laminated cell laminate according to the second embodiment, (b) is a plan view, and (c) is a left side view. (A) is a front view of the first polar electrode connection portion constituting the bus bar for the laminated cell laminate according to the second embodiment, (b) is a plan view, (c) is a left side view, and (d) is a right side view. It is a plan view. It is a connection diagram between the laminated cell laminated body when each electrode of the laminated cell laminated body is connected in series.

Next, a bus bar for a laminated cell laminate according to an embodiment of the present invention will be described. In the following description, the same or corresponding parts will be described with the same reference numerals.

FIG. 1 is a perspective view of a laminated cell laminated body 2 in which the electrode terminals 3a and 3b are connected to each other by using the laminated cell laminated body bus bar 1A according to the first embodiment. Each laminate cell 3 is placed on a plate frame-shaped frame 4 in the laminate cell laminate 2.

FIG. 2A is a schematic configuration diagram of one laminated cell 3, and FIG. 2B is a schematic configuration diagram of the laminated cell laminate 2.

As shown in FIG. 3A, the laminate cell 3 exemplified in the present embodiment accommodates a lithium ion secondary battery with the laminate film as the exterior body 3c. The laminated film is configured as, for example, a three-layer structure in which polypropylene, aluminum, and nylon are laminated in this order. Further, the lithium ion secondary battery is interposed between the negative electrode for a lithium ion secondary battery that stores and releases lithium ions, the positive electrode for a lithium ion secondary battery that stores and releases lithium ions, and the negative electrode and the positive electrode. It is composed of a separator and an electrolytic solution containing an electrolyte.

On one side on the front side of the exterior body 3c, there are a negative electrode terminal 3a having a negative electrode property (-) connected to the negative electrode for a lithium ion secondary battery and a positive electrode property (+) connected to a positive electrode for a lithium ion secondary battery. The second polar electrode terminals 3b are provided so as to project and side by side. The electrode surfaces of the first polar electrode terminal 3a and the second polar electrode terminal 3b are on the same surface and are parallel to the surface of the exterior body 3c.

As shown in FIG. 3B, the laminated cell laminated body 2 is composed of a plurality of laminated cells 3 stacked at a predetermined interval L. As shown in FIG. 1, the first polar electrode terminals 3a of each laminate cell 3 are electrically connected to each other by a plurality of first end plate portions 11A1 constituting the first polar electrode connection portion 11A of the bus bar 1A. .. Further, the second polar electrode terminals 3b are electrically connected to each other by a plurality of second end plate portions 12A1 constituting the second polar electrode connection portion 12A of the bus bar 1A. The bus bar 1A has a first external connection terminal 11A2 electrically conductively provided on each first end plate portion 11A1 and a second external electrically conductively provided on each second end plate portion 12A1. A connection terminal 12A2 is provided. Further, an electrode connecting portion 13A is provided between the plurality of first end plate portions 11A1 and the plurality of second end plate portions 12A1.

FIG. 3 is a perspective view showing a state in which the bus bar 1A is removed from the laminated cell laminate 2 shown in FIG. 1 toward the front surface side thereof. The frame 4 is interposed between the first polar electrode terminal 3a and the second polar electrode terminal 3b with gaps 4a and 4a on both sides for accommodating the first end plate portion 11A1 and the second end plate portion 12A1. A frame piece 4b is provided. The electrode connecting portion 13A is placed on the frame piece 4b of the central frame 4 of the three frames 4 as shown in FIG.

4 (a) is a perspective view of the bus bar 1A for the laminated cell laminate according to the first embodiment, FIG. 5 (a) is a front view of the bus bar 1A, and FIG. 5 (b) is a plan view and FIG. (C) is a left side view. The bus bar 1A includes a first polar electrode connecting portion 11A, a second polar electrode connecting portion 12A, and an electrode connecting portion 13A.

FIG. 4B is a perspective view of the first polar electrode connecting portion 11A. 6 (a) is a front view of the first polar electrode connecting portion 11A, FIG. 6 (b) is a plan view, FIG. 6 (c) is a left side view, and FIG. 6 (d) is a right side view. The first polar electrode connection portion 11A is provided with a plurality of first end plate portions 11A1 and a first external connection terminal 11A2 integrally. The plurality of first end plate portions 11A1 and the first external connection terminal 11A2 are integrally formed by bending a conductive plate such as a copper plate and laser welding each of the conductive plates.

In the present embodiment, one of the three first end plate portions 11A1 located at the center has a flat plate shape, and each of the upper and lower first end plate portions 11A1 has an L shape on the opposite side in the vertical direction. It is bent. Further, the first external connection terminal 11A2 is formed by bending a conductive plate in an L shape in the left-right direction, and another laminated cell laminate is formed at a bent end portion led out to a side portion of the laminate cell laminate 2. A female screw hole 11A3 for external connection with 2 is formed. In the first polar electrode connection portion 11A, the end faces of the left ends of the three first end plate portions 11A1 are thrust into the bent inner lower side surface of the first external connection terminal 11A2 at regular intervals. After being hit, each abutting portion is laser-welded or the like to form an integral body.

By this welding, the first end plate portion 11A1 and the first external connection terminal 11A2 are electrically connected to each other. Further, each first end plate portion 11A1 is arranged at the same pitch as the arrangement pitch of the first polar electrode terminals 3a of each laminate cell 3 which is laminated at a predetermined interval L in the laminate cell laminate 2, and has the first polarity. Each electrode terminal 3a has a surface parallel to each electrode surface parallel to each other. As shown in FIG. 1, these surfaces of each first end plate portion 11A1 are abutted against the electrode surface below the first polar electrode terminal 3a of each laminate cell 3, and each abutting surface is ultrasonically welded. Welded by etc.

As shown in FIG. 4, the second polar electrode connection portion 12A has a shape in which the left and right sides of the first polar electrode connection portion 11A are mirror-inverted, and a plurality of second end plate portions 12A1 and second external connection terminals 12A2. Are provided as one. The constituent materials and processing methods of the second end plate portion 12A1 and the second external connection terminal 12A2 are the same as those of the first end plate portion 11A1 and the first external connection terminal 11A2, and the second end plate portion 12A1 is provided. And the second external connection terminal 12A2 are electrically connected to each other and are integrally formed.

Further, each of the second end plate portions 12A1 is arranged at the same pitch as the arrangement pitch of the second polar electrode terminals 3b of each laminate cell 3, and is a surface of the second polar electrode terminals 3b parallel to the electrode surfaces parallel to each other. Each has. As shown in FIG. 1, these surfaces of each second end plate portion 12A1 are abutted against the electrode surface below the second polar electrode terminal 3b of each laminate cell 3, and each abutting surface is ultrasonically welded. Welded by etc.

The electrode connecting portion 13A is made of an electrically insulating resin, and the first polar electrode connecting portion 11A and the second polar electrode connecting portion 12A are arranged at relative positions shown in FIG. 4A. By filling the space secured in a rectangular shape between the two, the resin is solidified into the shape shown in the figure. Due to this solidification, the electrode connecting portion 13A is provided between the first polar electrode connecting portion 11A and the second polar electrode connecting portion 12A, and connects the first polar electrode connecting portion 11A and the second polar electrode connecting portion 12A. And integrate.

Further, the electrode connecting portion 13A is formed to have a thickness t1 (see FIG. 5A) smaller than the arrangement interval of the frame pieces 4b between the vertically adjacent frames 4 in the laminated cell integrated body 2. Therefore, as shown in FIG. 1, in the bus bar 1A, the electrode connecting portion 13A can be inserted between the frames 4, and the electrode connecting portion 13A can be placed on the frame piece 4b. Further, in the present embodiment, both the first external connection terminal 11A2 and the second external connection terminal 12A2 are provided so as to project from the upper side surface of one of the electrode connecting portions 13A, and are provided on the side portion of the laminated cell integrated body 2. It is derived as shown in FIG.

In the bus bar 1A according to the first embodiment as described above, the surfaces of the plurality of first end plate portions 11A1 in the first polar electrode connecting portion 11A that are parallel to each other are formed on the surfaces of the first polar electrode terminals 3a that are parallel to each other. While abutting on each of the parallel electrode surfaces, each of the plurality of second end plate portions 12A1 in the second polar electrode connection portion 12A parallel to each other is brought into contact with each other, and each of the second polar electrode terminals 3b parallel to them is parallel to each other. The contact surfaces of the first end plate portion 11A1 and the first polar electrode terminal 3a and the contact surfaces of the second end plate portion 12A1 and the second polar electrode terminal 3b are brought into contact with the electrode surface. Will be welded. By this welding, the electrical connection between each first end plate portion 11A1 of the first polarity electrode connection portion 11A and each first polarity electrode terminal 3a, and each second end plate portion 12A1 of the second polarity electrode connection portion 12A Is electrically connected to each of the second polar electrode terminals 3b. On the other hand, the first polar electrode connecting portion 11A and the second polar electrode connecting portion 12A are integrally formed by an electrode connecting portion 13A provided between them.

Therefore, the first electrode terminals 3a and the second electrode terminals 3b of each of the laminate cells 3 constituting the laminate cell laminate 2 can be welded only by using the parts of one bus bar 1A according to the present embodiment. , Electrically connected. Therefore, the number of parts and the work process required to connect the electrode terminals 3a and 3b of each laminate cell 3 to each other are reduced, and the electrical connection between the electrode terminals 3a and 3b of each laminate cell 3 is easy. You will be able to do it. Moreover, since this electrical connection is made regularly, the complexity of the welding work is eliminated.

Further, according to the bus bar 1A according to the first embodiment, the electrode connecting portion 13A is placed on the frame piece 4b of the frame 4, so that the bus bar 1A is supported by the frame 4, so that the bus bar 1A is supported. The placement position is fixed. Therefore, the electrical connection between the electrode terminals 3a and 3b of each laminate cell 3 is stably maintained, and the stability of the electrode structure is improved.

7 (a) is a perspective view of the bus bar 1B for a laminated cell laminate according to the second embodiment of the present invention, FIG. 8 (a) is a front view of the bus bar 1B, and FIG. 8 (b) is a plan view. , FIG. 8 (c) is a left side view. The bus bar 1B is also configured to include a first polar electrode connecting portion 11B, a second polar electrode connecting portion 12B, and an electrode connecting portion 13B.

FIG. 7B is a perspective view of the first polar electrode connecting portion 11B. 9 (a) is a front view of the first polar electrode connecting portion 11B, FIG. 9 (b) is a plan view, FIG. 9 (c) is a left side view, and FIG. 9 (d) is a right side view. .. The first polar electrode connection portion 11B of the bus bar 1B is also provided with a plurality of first end plate portions 11B1 and first external connection terminal 11B2 integrally, and a conductive plate having conductivity such as a copper plate is bent. Conductive plates are integrally formed by laser welding or the like.

Also in this embodiment, the one located in the center of the three first end plate portions 11B1 has a flat plate shape, and each of the upper and lower first end plate portions 11B1 has an L shape on the opposite side in the vertical direction. It is bent. Further, the first external connection terminal 11B2 is formed by bending a conductive plate into an L shape in the left-right direction on the opposite side of the bus bar 1A from the first external connection terminal 11A2. A female screw hole 11B3 for external connection with another laminated cell laminated body 2 is formed at a bent end portion of the first external connection terminal 11B2 led out to a side portion of the laminated cell laminated body 2. In the first polar electrode connection portion 11B, the end faces of the left ends of the three first end plate portions 11B1 abut against the bent outer side surface of the first external connection terminal 11B2 at regular intervals. Each of the abutting portions is laser-welded or the like to be integrally formed.

By this welding, the first end plate portion 11B1 and the first external connection terminal 11B2 are electrically connected to each other and are integrally formed. Further, each first end plate portion 11B1 is arranged at the same pitch as the arrangement pitch of the first polar electrode terminals 3a of each laminate cell 3, and is a surface parallel to each electrode surface parallel to each other of the first polar electrode terminals 3a. Each has. Each of these surfaces of the first end plate portion 11B1 is brought into contact with the electrode surface below the first polar electrode terminal 3a of each laminate cell 3 in the same manner as the bus bar 1A shown in FIG. Is welded by ultrasonic welding or the like.

As shown in FIG. 7A, the second polar electrode connection portion 12B has a shape in which the first polar electrode connection portion 11B is turned upside down, and the plurality of second end plate portions 12B1 and the second external connection terminal are formed. 12B2 is provided as one. The constituent materials and processing methods of the second end plate portion 12B1 and the second external connection terminal 12B2 are the same as those of the first end plate portion 11B1 and the first external connection terminal 11B2, and the second end plate portion 12B1 is provided. And the second external connection terminal 12B2 are electrically connected to each other.

Further, each of the second end plate portions 12B1 is arranged at the same pitch as the arrangement pitch of the second polar electrode terminals 3b of each laminate cell 3, and is a surface of the second polar electrode terminals 3b parallel to the electrode surfaces parallel to each other. Each has. Each of these surfaces of the second end plate portion 12B1 is brought into contact with the electrode surface below the second polar electrode terminal 3b of each laminate cell 3 in the same manner as the bus bar 1A shown in FIG. Is welded by ultrasonic welding or the like.

The electrode connecting portion 13B is also made of an electrically insulating resin, and the first polar electrode connecting portion 11B and the second polar electrode connecting portion 12B are arranged at relative positions shown in FIG. 7A. By filling the space secured in a rectangular shape between the two, the resin is solidified into the shape shown in the figure. Due to this solidification, the electrode connecting portion 13B is provided between the first polar electrode connecting portion 11B and the second polar electrode connecting portion 12B, and connects the first polar electrode connecting portion 11B and the second polar electrode connecting portion 12B. And integrate.

Further, the electrode connecting portion 13B is also formed to have a thickness t2 (see FIG. 8A) smaller than the arrangement interval of the frame pieces 4b between the vertically adjacent frames 4 in the laminated cell integrated body 2. Therefore, in the bus bar 1B, the electrode connecting portion 13B can be inserted between the frames 4, and the electrode connecting portion 13B can be placed on the frame piece 4b. Further, in the present embodiment, in the first external connection terminal 11B2 and the second external connection terminal 12B2, one of the first external connection terminals 11B2 projects to one upper side surface of the electrode connecting portion 13B, and the other second external connection is made. The terminal 12B2 is provided so as to project from the other lower side surface of the electrode connecting portion 13B, and is led out to the side portion of the laminated cell integrated body 2.

The bus bar 1B according to the second embodiment also exerts the same action and effect as the bus bar 1A according to the first embodiment, and the first electrode terminals 3a and the second electrode terminals 3b of the laminate cells 3 are connected to each other. Is electrically connected only by performing welding work using one part of the bus bar 1B according to the present embodiment. Therefore, the number of parts and the work process required to connect the electrode terminals 3a and 3b of each laminate cell 3 constituting the laminate cell laminate 2 to each other are reduced, and the electrode terminals 3a and 3a of each laminate cell 3 are reduced. The electrical connection between 3b can be easily made. Moreover, since this electrical connection is made regularly, the complexity of the welding work is eliminated.

Further, also by the bus bar 1B according to the second embodiment, the electrode connecting portion 13B is placed on the frame piece 4b of the frame 4, so that the bus bar 1B is supported by the frame 4 and the bus bar 1B is supported. The placement position is fixed. Therefore, the electrical connection between the electrode terminals 3a and 3b of each laminate cell 3 is stably maintained. Therefore, the electrical connection between the electrode terminals 3a and 3b of each laminate cell 3 is stably maintained, and the stability of the electrode structure is improved.

Further, according to the bus bar 1A according to the first embodiment and the bus bar 1B according to the second embodiment, by selecting the bus bar 1A or the bus bar 1B to be used, the first external connection terminal 11A1 and the second external in the bus bar 1A are selected. The arrangement position of the connection terminal 12A1 with respect to the electrode connecting portion 13A or the arrangement position of the first external connection terminal 111B2 and the second external connection terminal 12B2 on the bus bar 1B with respect to the electrode connection portion 13B can be selected. Therefore, the electrical connection mode between the first external connection terminals 11A1 and 11B2 and the second external connection terminals 12A1 and 12B2 between the certain laminate cell laminate 2 and the other laminate cell laminate 2 is adjusted to match the connection environment. Can be selected. Therefore, the electrical connection between the laminated cells 2 and 2 can be easily performed according to the connection environment.

For example, in a connection environment in which the laminated cell laminates 2 and 2 are arranged side by side in the horizontal direction, by using the bus bar 1A, a bus bar (not shown) connecting the laminated cell laminates 2 and 2 can be arranged in a straight line. .. Further, in a connection environment in which the laminated cell laminates 2 and 2 are vertically arranged vertically, the bus bar 1B can be used to shorten the bus bar (not shown) connecting the laminated cell laminates 2 and 2.

In each of the above embodiments, when the connections between the electrode terminals 3a and 3b of each laminate cell 3 are connected in series, as shown in FIG. 10, when connecting each laminate cell laminate 2, the first The laminate cells 3 of each laminate cell laminate 2 are arranged so that the electrode terminals 3a and the second electrode terminals 3b are alternately positioned in the vertical direction. Also in this case, the same action and effect as those of each of the above-described embodiments are exhibited.

1A, 1B: Bus bar 11A, 11B: 1st polar electrode connection part 11A1, 11B1: 1st end plate part 11A2, 11B2: 1st external connection terminal 11A3, 11B3: Female screw hole 12A, 12B: 2nd polar electrode connection part 12A1, 12B1: 2nd end plate 12A2, 12B2: 2nd external connection terminal 12A3, 12B3: Female screw hole 13A, 13B: Electrode connection part 2: Laminate cell laminate 3: Laminate cell 3a: 1st polar electrode terminal 3b : Second polar electrode terminal 4: Frame 4a: Gap 4b: Frame piece

Claims (4)

Laminated cells are arranged at the same pitch as the arrangement pitch of the first polar electrode terminals of the laminated cells that are stacked at predetermined intervals, and the surfaces of the first polar electrode terminals that are parallel to each other and parallel to each other are arranged. A plurality of first end plate portions and a first external connection terminal provided electrically conductively on each of the first end plate portions and led out to a side portion of the laminate cell laminate are integrated. With the provided first polarity electrode connection part,
A surface parallel to each electrode surface of the second polar electrode terminal, which is arranged at the same pitch as the arrangement pitch of the second polar electrode terminal provided in each of the laminated cells along with the first polar electrode terminal and is parallel to each other. The plurality of second end plate portions and the second external connection terminals provided electrically conductively on each of the second end plate portions and led out to the side portions of the laminated cell laminate are integrated. With the provided second polarity electrode connection part,
Electrical insulation is provided between the first polar electrode connection portion and the second polar electrode connection portion, and the first polar electrode connection portion and the second polar electrode connection portion are connected and integrated. A bus bar for a laminated cell laminate, which is provided with an electrode connecting portion made of a resin. The bus bar for a laminated cell laminate according to claim 1, wherein both the first external connection terminal and the second external connection terminal are provided so as to project from one side surface of the electrode connecting portion. The first aspect of claim 1 is characterized in that one of the first external connection terminal and the second external connection terminal is provided so as to project from one side surface of the electrode connecting portion and the other projecting to the other side surface of the electrode connecting portion. The bus bar for the laminated cell laminate described. Each of the laminate cells is placed on a frame in the laminate cell laminate and
The electrode connecting portion is a frame interposed between the first polar electrode terminal and the second polar electrode terminal with a gap on both sides for accommodating the first end plate portion and the second end plate portion. The laminate cell according to any one of claims 1 to 3, wherein the laminated cell is placed on the frame piece and formed to have a thickness smaller than the arrangement interval of the frame pieces between adjacent frames. Bus bar for laminates.

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