Laminated Cell

Abstract

To provide a laminated cell in which the positioning of electrode terminals can be performed easily.SOLUTION: A laminated cell used for a battery module configured such that a plurality of laminated cells are stacked and electrically connected to each other includes a cell body and a positive terminal and a negative terminal which protrude side by side from the cell body. One terminal of the positive terminal and the negative terminal has higher rigidity than the other terminal and extends to a position away from the cell body. Thus, by using the one terminal as reference for positioning, the positioning of a laminated cell can be performed easily.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a laminated cell. [Background technology]

[0002] Conventionally, as this type of laminate cell, a laminate cell for use in a battery module formed by stacking a plurality of laminate cells and electrically connecting them has been proposed (see, for example, Patent Document 1). In this laminate cell, the electrode terminals are inserted into the terminal insertion holes of the busbar, and the portions protruding from the terminal insertion holes are bent. Then, adjacent electrode terminals of the same polarity are electrically connected to each other. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2007-265945 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned laminate cell, the electrode terminals are designed to have low rigidity because the portions protruding from the terminal insertion holes need to be bent, which may make it difficult to position the electrode terminals.

[0005] A main object of the laminate cell of the present invention is to facilitate the positioning of electrode terminals. [Means for solving the problem]

[0006] The laminate cell of the present invention employs the following means to achieve the above-mentioned main object.

[0007] The laminate cell of the present invention comprises: A laminate cell for use in a battery module formed by stacking a plurality of laminate cells and electrically connecting them to each other, A cell body and a positive terminal and a negative terminal protruding side by side from the cell body, One of the positive terminal and the negative terminal has a higher rigidity than the other terminal and extends to a position away from the cell body. The gist of the present invention is as follows.

[0008] The laminate cell of the present invention has a cell body and a positive electrode terminal and a negative electrode terminal that protrude from the cell body in parallel, and one of the positive electrode terminal and the negative electrode terminal has a higher rigidity than the other terminal and extends to a position away from the cell body. This makes it easy to position the laminate cell by using one terminal as a reference for positioning. Also, by making the rigidity of the other terminal relatively low, it is possible to absorb dimensional tolerances and thermal expansion of the electrode terminals.

[0009] In the laminate cell of the present invention, the one terminal may have a greater rigidity than the other terminal by being thicker than the other terminal, and the one terminal may be made of a material having a larger Young's modulus than the other terminal by being made of a material having a larger Young's modulus than the other terminal.

[0010] The laminate cell of the present invention may further comprise a fixing portion for fixing an end portion of the one terminal on the cell body side, thereby enabling the laminate cell to be positioned more accurately.

[0011] In the laminate cell of the present invention, the cell body may have an electrode body in which a positive electrode body and a negative electrode body are laminated and insulated from each other, and a laminate film that houses the electrode body, and the positive electrode terminal may have a first positive electrode portion having one end connected to the positive electrode body within the laminate film and protruding and extending from the laminate film to one side in a first direction perpendicular to a thickness direction of the laminate film, and a second positive electrode portion extending from the other end of the first positive electrode portion to one side in a second direction that is the thickness direction of the laminate film, and the negative electrode terminal may have a first negative electrode portion having one end connected to the negative electrode body within the laminate film and protruding and extending from the laminate film to one side in the first direction, and a second negative electrode portion extending from the other end side of the first negative electrode portion to the other side in the second direction.

[0012] In the laminate cell of the present invention, the positive electrode terminal includes a cell body having an electrode body in which a positive electrode body and a negative electrode body are laminated and insulated from each other, and a laminate film that houses the electrode body, and includes a first positive electrode portion having one end connected to the positive electrode body within the laminate film and extending from the laminate film to one side in a first direction perpendicular to a thickness direction of the laminate film, a second positive electrode portion extending from the other end of the first positive electrode portion to one side in a second direction that is the thickness direction of the laminate film, and the first positive electrode portion in the second positive electrode portion. the negative electrode terminal may have a first negative electrode portion having one end connected to the negative electrode body within the laminate film and extending to protrude from the laminate film to one side in the first direction, a second negative electrode portion extending from the other end side of the first negative electrode portion to the other side in the second direction, and a third negative electrode portion extending from an end of the second negative electrode portion opposite to the first negative electrode portion to a side away from the laminate film in the first direction.

[0013] In the laminate cell of the present invention, the positive electrode terminal may have a cell body including an electrode body insulated from one another and laminated with a positive electrode body and a negative electrode body, and a laminate film that houses the electrode body, a first positive electrode portion having one end connected to the positive electrode body within the laminate film and extending so as to protrude from the laminate film to one side in a first direction perpendicular to a thickness direction of the laminate film, and a second positive electrode portion extending to one side in a second direction, which is the thickness direction of the laminate film, from a surface of the first positive electrode portion opposite to a surface facing the negative electrode terminal, and the negative electrode terminal may have a first negative electrode portion having one end connected to the negative electrode body within the laminate film and extending so as to protrude from the laminate film to one side in the first direction, and a second negative electrode portion extending to the other side in the second direction from a surface of the first negative electrode portion opposite to a surface facing the positive electrode terminal. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 is a diagram showing an outline of the configuration of a laminate cell 20 according to an embodiment of the present invention. [Diagram 2] 2 is a diagram showing the outline of the configuration of a battery module 50. FIG. [Diagram 3] 2 is a diagram showing the outline of the configuration of a battery module 50. FIG. [Figure 4] 3A to 3C are process diagrams showing processes for manufacturing the battery module 50. [Diagram 5] 2 is a diagram showing an outline of the configuration of a battery module 150. FIG. [Figure 6] 2 is a diagram showing an outline of the configuration of a battery module 150. FIG. [Figure 7] 2 is a diagram showing an outline of the configuration of a battery module 250. FIG. [Figure 8] 2 is a diagram showing an outline of the configuration of a battery module 250. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Next, an embodiment of the present invention will be described with reference to the accompanying drawings. EXAMPLES

[0016] 1 is a schematic diagram showing the configuration of a laminate cell 20 according to one embodiment of the present invention. As shown in the figure, the laminate cell 20 of the embodiment includes an electrode assembly 22, a laminate film 24, a negative electrode terminal 30, and a positive electrode terminal 40.

[0017] The electrode body 22 is configured as a laminated electrode body, and rectangular sheet-shaped positive and negative electrode bodies are laminated so as to be insulated from each other. The electrode body 22 is enclosed (housed) in a laminate film 24. The laminate film 24 has a resin film layer as a surface layer and a metal layer as an inner layer. The resin film layer is made of, for example, polyethylene or polyethylene terephthalate. The metal layer is made of, for example, aluminum or an aluminum alloy.

[0018] The negative electrode terminal 30 is configured as an L-shaped terminal, and has a first negative electrode portion 30a having one end connected to the electrode body 22 (negative electrode body) via a current collector foil 32 in the laminate film 24 and extending from the laminate film 24 to one side (the right side in FIG. 1) in a first direction (the left-right direction in FIG. 1) perpendicular to the thickness direction of the laminate cell 20, and a second negative electrode portion 30b extending from the other end side of the first negative electrode portion 30a to one side (the far side in FIG. 1) in a second direction (the direction penetrating the paper surface in FIG. 1) perpendicular to the first direction and which is the thickness direction of the laminate cell 20. The negative electrode terminal 30 is manufactured by processing (e.g., extrusion processing) a material (e.g., an aluminum alloy) having a relatively small Young's modulus.

[0019] The positive electrode terminal 40 is configured as an L-shaped terminal, and has a first positive electrode portion 40a that is connected at one end to the electrode body 22 (positive electrode body) via a current collector foil 42 in the laminate film 24 and extends from the laminate film 24 to one side in the first direction in parallel with the negative electrode terminal 30 (first negative electrode portion 30a), and a second positive electrode portion 40b that extends from the other end side of the first positive electrode portion 40a to the other side in the second direction (the side opposite to the side to which the second negative electrode portion 30b extends with respect to the first negative electrode portion 30a, the front side in FIG. 1). One end of the first positive electrode portion 40a of the positive electrode terminal 40 is fixed by a resin holder 44 so that displacement (displacement in the up-down direction, left-right direction, and front-rear direction in FIG. 1) is limited. The positive electrode terminal 40 is manufactured by processing (e.g., pressing) a material (e.g., magnesium alloy, nickel, etc.) having a larger Young's modulus than the negative electrode terminal 30. The positive electrode terminal 40 is configured as a terminal having a thicker plate thickness than the negative electrode terminal 30. The first positive electrode portion 40a of the positive electrode terminal 40 extends to a position farther away from the laminate film 24 than the first negative electrode portion 30a of the negative electrode terminal 30. Therefore, the second positive electrode portion 40b is located at a position farther away from the laminate film 24 than the second negative electrode portion 30b.

[0020] 2 and 3 are diagrams showing an outline of the configuration of the battery module 50. FIG. 3 corresponds to a view of the battery module 50 in FIG. 2 as seen from the right side. As shown in FIG. 2 and FIG. 3, the battery module 50 is configured by alternately stacking a first type laminate cell 20A and a second type laminate cell 20B, and connecting the positive terminal 40 of the laminate cell 20A to the negative terminal 30 of the adjacent laminate cell 20B on one side in the stacking direction (the lower side in FIG. 2 and FIG. 3) and connecting the positive terminal 40 of the laminate cell 20A to the positive terminal 40 of the adjacent laminate cell 20B on the other side in the stacking direction (the upper side in FIG. 2 and FIG. 3). Here, the laminate cell 20A is the laminate cell 20 in Fig. 1 (a laminate cell in which the positive electrode terminal 40 protrudes from the laminate film 24 above the negative electrode terminal 30 in Fig. 1 (front side in Fig. 2, left side in Fig. 3)), and the laminate cell 20B is a laminate cell obtained by turning the laminate cell 20 in Fig. 1 upside down (a laminate cell in which the positive electrode terminal 40 protrudes below the negative electrode terminal 30 in Fig. 1 (back side in Fig. 2, right side in Fig. 3)). Note that a spacer may be disposed between two adjacent laminate cells 20A, 20B. In addition, the negative electrode terminal 30 of the laminate cell 20 at the extreme end side in the stacking direction of the battery module 50 (the uppermost side in Figures 2 and 3) becomes the negative electrode terminal of the entire battery module 50, and the positive electrode terminal 40 of the laminate cell 20 at the extreme other end side (the lower side in Figures 2 and 3) becomes the positive electrode terminal of the entire battery module 50.

[0021] Next, a process for manufacturing the battery module 50 will be described. Fig. 4 is a process diagram showing the process for manufacturing the battery module 50. In the process for manufacturing the battery module 50, as shown in the figure, first, a plurality of laminate cells 20 (laminate cells 20A, 20B) are stacked (step S100). This process is performed by alternately stacking the first type laminate cells 20A and the second type laminate cells 20B (see Figs. 2 and 3) so that the orientations of the second positive electrode parts 40b of the positive electrode terminals 40 of the plurality of laminate cells 20A, 20B relative to the first positive electrode parts 40a are aligned (for example, aligned downward as in Figs. 2 and 3).

[0022] Next, the laminate cells 20A, 20B are positioned (step S110). This step can be performed, for example, by pressing the surface (the right surface in FIG. 2) of the second positive electrode portion 40b of the positive electrode terminal 40 of the stacked laminate cells 20A, 20B opposite the laminate film 24 side against an alignment jig disposed to the right of the positive electrode terminal 40 in FIG. 2. The alignment jig is configured as a jig having a flat portion against which the second positive electrode portion 40b of the positive electrode terminal 40 of the laminate cells 20A, 20B is pressed. The positive electrode terminal 40 extends to a position farther away from the laminate film 24 than the negative electrode terminal 30 (protrudes to the right in FIG. 2), has higher rigidity than the negative electrode terminal 30, and is held by a resin holder 44. Therefore, step S110 can easily position the laminate cells 20A, 20B (particularly, positioning in the left-right direction in FIG. 2).

[0023] Then, the negative electrode terminals 30 of the laminate cells 20A, 20B are connected to the positive electrode terminals 40 of the adjacent laminate cells 20B, 20A (step S120) to complete the battery module 50. Step S120 can be performed, for example, by clamping the second negative electrode portion 30b of the negative electrode terminal 30 and the second positive electrode portion 40b of the positive electrode terminal 40 so that the surface of the second negative electrode portion 30b opposite the laminate film 24 side (the right surface in FIG. 2) and the surface of the second positive electrode portion 40b facing the laminate film 24 side (the left surface in FIG. 2) are in contact with each other, welding the second negative electrode portion 30b and the second positive electrode portion 40b in this state, and then releasing the clamp. Since the rigidity of the negative electrode terminal 30 is lower than that of the positive electrode terminal 40 and the negative electrode terminal 30 is not held by a resin holder, the dimensional tolerances and thermal expansion of the positive electrode terminal 40 and the negative electrode terminal 30 (particularly the dimensional tolerances and thermal expansion in the vertical and horizontal directions in FIG. 2) can be absorbed by the displacement and deformation of the negative electrode terminal 30. Note that between steps S110 and S120, the multiple laminate cells 20A, 20B may be restrained by a restraining device or the like to define the distance between adjacent laminate cells 20A, 20B in the stacking direction.

[0024] The laminate cell 20 of the embodiment described above has a positive electrode terminal 40 and a negative electrode terminal 30 that protrude side by side from the laminate film 24 that encapsulates the electrode body 22, and the positive electrode terminal 40 has higher rigidity than the negative electrode terminal 30 and extends to a position separated from the laminate film 24. This makes it possible to easily position the laminate cell 20 by using the positive electrode terminal 40 as a reference for positioning. In addition, by making the rigidity of the negative electrode terminal 30 relatively low, it is possible to absorb the dimensional tolerances and thermal expansion of the positive electrode terminal 40 and the negative electrode terminal 30.

[0025] The laminate cell 20 of the embodiment has a shape used in the battery module 50 of Figs. 2 and 3. However, it may have a shape used in the battery module 150 of Figs. 5 and 6. Fig. 6 corresponds to a view of the battery module 150 of Fig. 5 seen from the right side. As shown in Figs. 5 and 6, the battery module 150 is configured by alternately stacking a first type laminate cell 120A and a second type laminate cell 120B, and the positive terminal 140 of the laminate cell 120A is connected to the negative terminal 130 of the adjacent laminate cell 120B on one side in the stacking direction (lower side in Figs. 5 and 6), and the negative terminal 130 of the laminate cell 120A is connected to the positive terminal 140 of the adjacent laminate cell 120B on the other side in the stacking direction (upper side in Figs. 5 and 6). The laminate cell 120A is a laminate cell in which the shapes of the positive electrode terminal 140 and the negative electrode terminal 130 differ from the shapes of the positive electrode terminal 40 and the negative electrode terminal 30 of the laminate cell 20, and the laminate cell 120B is a laminate cell obtained by flipping the laminate cell 20A in FIG. The negative electrode terminal 130 has a first negative electrode portion 130a, one end of which is connected to the electrode body 22 (negative electrode body) within the laminate film 24 via a current collecting foil 42, and which protrudes and extends from the laminate film 24 to one side (the right side in FIG. 5) in a first direction (the left-right direction in FIG. 5) perpendicular to the thickness direction of the laminate cells 120A, 120B, a second negative electrode portion 130b extending from the other end side of the first negative electrode portion 130a to one side (the upper side in FIG. 5) in a second direction (the up-down direction in FIG. 5) which is perpendicular to the first direction and is the thickness direction of the laminate cells 120A, 120B, and a third negative electrode portion 130c extending from the side of the second negative electrode portion 130b opposite to the first negative electrode portion 130a to a side away from the laminate film 24 in the first direction (the right side in FIG. 5).The positive electrode terminal 140 has a first positive electrode portion 140a, one end of which is connected to the electrode body 22 (positive electrode body) via the current collector foil 42 in the laminate film 24, and which extends from the laminate film 24 in a manner to protrude to one side in the first direction alongside the negative electrode terminal 130 (first negative electrode portion 130a), a second positive electrode portion 140b, which extends from the other end side of the first positive electrode portion 140a to the other side in the second direction (the side opposite to the side to which the second negative electrode portion 130b extends with respect to the first negative electrode portion 130a, the lower side in FIG. 5), and a third positive electrode portion 140c, which extends from the side of the second positive electrode portion 140b opposite to the first positive electrode portion 140a to the side away from the laminate film 24 in the first direction (the right side in FIG. 5). The positive electrode terminal 140 is configured as a terminal having a thicker plate thickness than the negative electrode terminal 130. The third positive electrode portion 140c of the positive electrode terminal 140 extends to a position farther away from the electrode body 22 than the third negative electrode portion 130c of the negative electrode terminal 130.

[0026] When manufacturing the battery module 150, the step of positioning the multiple laminate cells 120A, 120B can be performed, for example, by pressing the surface (the right surface in Fig. 5) of the third positive electrode portion 140c of the positive electrode terminal 140 of the stacked laminate cells 120A, 120B opposite the laminate film 24 side against an alignment jig arranged to the right of the positive electrode terminal 140 in Fig. 5. The alignment jig is configured as a jig having a flat portion for pressing the third positive electrode portion 140c of the positive electrode terminal 140 of the laminate cells 120A, 120B against it. The positive electrode terminal 140 extends to a position farther away from the laminate film 24 than the negative electrode terminal 130 (protruding to the right in FIG. 5), has higher rigidity than the negative electrode terminal 130, and is held by a resin holder 44 (not shown) like the laminate cell 20, so that the positioning of the laminate cells 120A, 120B (particularly, positioning in the left-right direction in FIG. 5) can be easily performed.

[0027] The process of connecting the negative electrode terminals 130 of the laminate cells 120A, 120B to the positive electrode terminals 140 of the adjacent laminate cells 120B, 120A can be performed, for example, by clamping the third negative electrode portion 130c of the negative electrode terminal 130 and the third positive electrode portion 140c of the positive electrode terminal 140 so that the surface of the third negative electrode portion 130c opposite the first negative electrode portion 130a side in the second direction (upper surface in FIG. 5) and the surface of the third positive electrode portion 140c opposite the first positive electrode portion 140a side in the second direction (lower surface in FIG. 5) are in contact with each other, welding the third negative electrode portion 130c and the third positive electrode portion 140c in this state, and then releasing the clamp. Since the rigidity of the negative electrode terminal 130 is lower than that of the positive electrode terminal 140 and the negative electrode terminal 130 is not held by a resin holder, the displacement and deformation of the negative electrode terminal 130 can absorb the dimensional tolerances and thermal expansion of the positive electrode terminal 140 and the negative electrode terminal 130 (particularly the dimensional tolerances and thermal expansion in the vertical and horizontal directions in FIG. 5).

[0028] The laminate cell 20 of the embodiment has a shape used in the battery module 50 of Figs. 2 and 3. However, it may have a shape used in the battery module 250 of Figs. 7 and 8. Fig. 8 corresponds to a view of the battery module 250 of Fig. 7 seen from the right side. As shown in Figs. 7 and 8, the battery module 250 is configured by alternately stacking a first type laminate cell 220A and a second type laminate cell 220B, and the positive terminal 240 of the laminate cell 220A is connected to the negative terminal 230 of the adjacent laminate cell 220B on one side in the stacking direction (lower side in Figs. 7 and 8), and the negative terminal 230 of the laminate cell 220A is connected to the positive terminal 240 of the adjacent laminate cell 220B on the other side in the stacking direction (upper side in Figs. 7 and 8). The laminate cell 220A is a laminate cell in which the shapes of the positive electrode terminal 240 and the negative electrode terminal 230 differ from the shapes of the positive electrode terminal 40 and the negative electrode terminal 30 of the laminate cell 20, and the laminate cell 220B is a laminate cell obtained by flipping the laminate cell 20A in FIG. The negative electrode terminal 230 has a first negative electrode portion 230a, one end of which is connected to the electrode body 22 via the current collecting foil 32 within the laminate film 24, and which protrudes and extends from the laminate film 24 to one side (the right side in FIG. 7) in a first direction (the left-right direction in FIG. 7) perpendicular to the thickness direction of the laminate cells 220A, 220B, and a second negative electrode portion 230b, which extends from a surface opposite to the surface facing the positive electrode terminal 240 to one side (the upper side in FIG. 7) in a second direction (the up-down direction in FIG. 7) which is perpendicular to the first direction and is the thickness direction of the laminate cells 220A, 220B. The positive electrode terminal 240 has a first positive electrode portion 240a, one end of which is connected to the electrode body 22 via the current collecting foil 32 in the laminate film 24, and which projects and extends from the laminate film 24 to one side in the first direction alongside the negative electrode terminal 230 (first negative electrode portion 230a), and a second positive electrode portion 240b, which extends from a surface opposite to a surface facing the negative electrode terminal 230 to the other side in the second direction (the lower side in FIG. 7). The positive electrode terminal 240 is configured as a terminal having a thicker plate thickness than the negative electrode terminal 230. The first positive electrode portion 240a of the positive electrode terminal 240 extends to a position farther away from the electrode body 22 than the first negative electrode portion 230a of the negative electrode terminal 230.

[0029] When manufacturing the battery module 250, the step of positioning the multiple laminate cells 220A, 220B can be performed, for example, by pressing the surface of the positive electrode terminal 240 of the stacked laminate cells 220A, 220B opposite the laminate film 24 side (the right surface in Fig. 7) against an alignment jig arranged to the right of the positive electrode terminal 240 in Fig. 7. The alignment jig is configured as a jig having a flat portion against which the positive electrode terminal 240 of the laminate cells 220A, 220B is pressed. The positive electrode terminal 240 extends to a position farther away from the laminate film 24 than the negative electrode terminal 230 (protruding to the right in FIG. 7), has higher rigidity than the negative electrode terminal 230, and is held by a resin holder 44 (not shown) like the laminate cell 20, so that the positioning of the laminate cells 220A, 220B (particularly, positioning in the left-right direction in FIG. 7) can be easily performed.

[0030] The process of connecting the negative electrode terminals 230 of the laminate cells 220A, 220B to the positive electrode terminals 240 of the adjacent laminate cells 220B, 220A can be performed, for example, by clamping the second negative electrode portion 230b of the negative electrode terminal 230 and the second positive electrode portion 240b of the positive electrode terminal 240 so that the surface of the second negative electrode portion 230b opposite the surface facing the positive electrode terminal 240 (the rear surface of 220A in FIG. 7) and the surface of the second positive electrode portion 240b opposite the surface facing the negative electrode terminal 230 (the front surface of 220B in FIG. 5) are in contact with each other, welding the second negative electrode portion 230b and the second positive electrode portion 240b in this state, and then releasing the clamp. Since the rigidity of the negative terminal 230 is lower than that of the positive terminal 240 and the negative terminal 230 is not held by a resin holder, the displacement and deformation of the negative terminal 230 can absorb the dimensional tolerances and thermal expansion of the positive terminal 240 and the negative terminal 230 (particularly the dimensional tolerances and thermal expansion in the vertical and horizontal directions in FIG. 7).

[0031] The positive electrode terminal 40 is configured as a terminal formed of a material having a larger Young's modulus and having a larger plate thickness than the negative electrode terminal 30. However, the positive electrode terminal 40 may be a terminal having a larger rigidity than the negative electrode terminal 30, and may be a terminal formed of a material having a Young's modulus similar to that of the negative electrode terminal 30, or may be a terminal having a plate thickness similar to that of the negative electrode terminal 30.

[0032] In the laminate cell 20 of the embodiment, the positive electrode terminal 40 has higher rigidity than the negative electrode terminal 30 and extends to a position separated from the laminate film 24. However, the negative electrode terminal 30 may have higher rigidity than the positive electrode terminal 40 and extend to a position separated from the electrode body 22.

[0033] The correspondence between the main elements of the embodiment and the main elements of the invention described in the section on means for solving the problems will be explained below. In the embodiment, the electrode body 22 and the laminate film 24 correspond to the "cell body", the positive terminal 40 corresponds to the "positive terminal", and the negative terminal 30 corresponds to the "negative terminal".

[0034] The correspondence between the main elements of the Examples and the main elements of the invention described in the Summary of the Problem column does not limit the elements of the invention described in the Summary of the Problem column, since the Examples are examples for specifically explaining the mode for implementing the invention described in the Summary of the Problem column. In other words, the interpretation of the invention described in the Summary of the Problem column should be based on the description in that column, and the Examples are merely a specific example of the invention described in the Summary of the Problem column.

[0035] Although the form for carrying out the present invention has been described above using examples, the present invention is not limited to these examples in any way, and it goes without saying that the present invention can be carried out in various forms without departing from the scope of the gist of the present invention. [Industrial Applicability]

[0036] The present invention is applicable to the laminate cell manufacturing industry and the like. [Explanation of symbols]

[0037] 20, 20A, 20B, 120A, 120B, 220A, 220B laminate cell, 22 electrode body, 24 laminate film, 30, 130, 230 negative electrode terminal, 40, 140, 240 positive electrode terminal, 30a, 130a, 230a first negative electrode portion, 30b, 130b, 230b second negative electrode portion, 130c third negative electrode portion, 40a, 140a, 240a first positive electrode portion, 40b, 140b, 240b second positive electrode portion, 140c third positive electrode portion, 32, 42 current collecting foil, 44 resin holder, 50, 150, 250 battery module.

Claims

[Claim 1] A laminate cell for use in a battery module formed by stacking a plurality of laminate cells and electrically connecting them to each other, A cell body and a positive terminal and a negative terminal protruding side by side from the cell body, The positive electrode terminal is directly connected to the negative electrode terminal of the adjacent laminate cell on one side in the stacking direction of the plurality of laminate cells, The negative electrode terminal is directly connected to the positive electrode terminal of the laminate cell adjacent to the other side in the stacking direction, One of the positive terminal and the negative terminal has a higher rigidity than the other terminal and extends to a position away from the cell main body, the one terminal is fixed by a holder so that the displacement of the end portion on the cell body side is restricted; The other terminal is not held by the holder and is displaceable. Laminated cell.

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