Electrochemical assembly, corresponding battery and method

Abstract

The invention relates to an electrochemical assembly comprising: a first electrochemical element stack (18) provided with a first electrical connection tab (20) having a first polarity, the first electrochemical element stack extending along a stacking plane (PE); and a first common connection element (26) for electrically connecting the first electrical connection tab to an electrical connection terminal (14) having the first polarity.

Description

Technical Field

[0001] This invention relates to an electrochemical assembly, which includes:

[0002] The first electrochemical element stack has a first electrical connection piece having a first polarity.

[0003] The first electrochemical element stack extends along the stack plane.

[0004] A first common connection element is adapted to electrically connect a first electrical connection lug to an electrical connection terminal having a first polarity. Background Technology

[0005] For example, an electrochemical assembly is known from US2019 / 0074487. This electrochemical assembly includes two electrochemical element stacks, each of which includes an electrical connection tab. The tabs are stacked on top of each other and supported by a support plate disposed above the two stacks. The tabs extend on both sides around the edge of the support plate. The tabs and the support plate are stacked on the two electrochemical element stacks.

[0006] Other electrochemical components or electrochemical cells are known from the following literature: WO2018159618A1; EP3451409A1; WO2018126439A1; WO2018030570A1; US2016336574A1; CN205543009U; EP2866279A1; EP2953186A1; EP2500964A2; US2011076532A1 and KR101233626B1.

[0007] The object of this invention is to provide an easy and economical method for manufacturing electrochemical components. In particular, the object of this invention is to provide a reliable, economical, and compact connection between the electrode and the terminals of the electrochemical component. Summary of the Invention

[0008] Therefore, the subject matter of the present invention relates to the above-described type of electrochemical assembly, characterized in that the first common connection element includes a first electrical connection rib fastened to a first electrical connection tab.

[0009] The electrochemical assembly includes a first support element.

[0010] The first electrical connection piece is arranged between the first electrical connection rib and the first support element.

[0011] Specifically, the first electrical connection piece and the first electrical connection rib extend substantially parallel to the stacking plane.

[0012] According to a specific implementation of the electrochemical component, the electrochemical component may have one or more of the following features:

[0013] -Electrochemical components include:

[0014] The second electrochemical element stack is provided with a second electrical connection piece having a first polarity;

[0015] The second electrochemical element stack extends along the stacking plane.

[0016] A first common connecting element that electrically connects the first and second electrical connecting pieces is adapted to connect the second electrical connecting piece to an electrical connecting terminal having a first polarity, wherein

[0017] The first common connection element includes a second electrical connection rib that is fastened to the second electrical connection tab, wherein

[0018] The electrochemical assembly includes a second support element, wherein

[0019] The second electrical connection piece is arranged between the second electrical connection rib and the second support element, specifically, wherein

[0020] The second electrical connection piece and the second electrical connection rib extend substantially parallel to the stacking plane.

[0021] - The electrochemical assembly includes a first support member forming a first support element and a second support element, the first support member including at least one central core disposed between the first support element and the second support element.

[0022] - The central core is arranged substantially perpendicular to or substantially parallel to the support plane defined by the first support element and the second support element;

[0023] - The first common connection element is fastened to the first electrical connection piece by material connection, particularly by laser welding, and the first electrical connection piece is fastened to the first support element by material connection, particularly by laser welding.

[0024] and / or

[0025] The first common connection element is fastened to the second electrical connection piece by material connection, particularly by laser welding, and the second electrical connection piece is fastened to the second support element by material connection, particularly by laser welding;

[0026] -The first common connection element includes an electrical connection core disposed between the first electrical connection rib and the second electrical connection rib;

[0027] - The electrical connection core is stepped and includes a terminal portion and an end, with the terminal portion offset relative to the end toward the electrochemical element stack;

[0028] - The first electrical connection rib and the second electrical connection rib are arranged between the first electrical connection piece and the second electrical connection piece, and wherein

[0029] The first electrical connection piece and the second electrical connection piece are arranged between the first support element and the second support element;

[0030] - The first support element and the second support element are arranged between the first electrical connection piece and the second electrical connection piece, and wherein

[0031] The first electrical connection piece and the second electrical connection piece are arranged between the first electrical connection rib and the second electrical connection rib.

[0032] -The first electrochemical element stack is provided with a third electrical connection piece having a second polarity, and

[0033] The second electrochemical element stack is provided with a fourth electrical connection piece having a second polarity.

[0034] The electrochemical assembly includes a second common connection element that electrically connects a third electrical connection piece and a fourth electrical connection piece, and is adapted to electrically connect the third and fourth electrical connection pieces to an electrical connection terminal having a second polarity.

[0035] The second common connection element includes:

[0036] The third electrical connection rib, which is fastened to the third electrical connection terminal piece, and

[0037] The fourth electrical connection rib, which is fastened to the fourth electrical connection terminal block, wherein

[0038] The electrochemical assembly includes a second support element that forms a third support element and a fourth support element, and the second support element includes at least one central core disposed between the third support element and the fourth support element, wherein...

[0039] The third electrical connection piece is arranged between the third electrical connection rib and the third support element, and

[0040] The fourth electrical connection piece is arranged between the fourth electrical connection rib and the fourth support element, and specifically, wherein

[0041] The third electrical connection piece and the third electrical connection rib extend substantially parallel to the stacking plane, and

[0042] The fourth electrical connection piece and the fourth electrical connection rib extend substantially parallel to the stacking plane;

[0043] - The first common connecting element and the second common connecting element have the same shape and are arranged according to a planar symmetry construction about the plane of symmetry.

[0044] The present invention also relates to a battery, which includes:

[0045] shell;

[0046] The cover is provided with an electrical connection terminal of a first polarity, and preferably with an electrical connection terminal of a second polarity.

[0047] Electrochemical components,

[0048] Its features are:

[0049] An electrochemical component is an electrochemical component as defined above, and

[0050] The first common connection element is electrically connected to an electrical connection terminal having a first polarity.

[0051] Another subject of the present invention is a method for manufacturing an electrochemical component, comprising the following steps:

[0052] A first electrochemical element stack is provided, the first electrochemical element stack having a first electrical connection piece having a first polarity.

[0053] A first common connection element is provided, which is adapted to electrically connect a first electrical connection lug to an electrical connection terminal having a first polarity.

[0054] The first electrical connection piece is arranged between the first electrical connection rib and the first support element, and

[0055] Secure and connect the first electrical connection rib and the first support element to the first electrical connection piece. Attached Figure Description

[0056] The invention will be better understood after reading the following description, given only as an example and with reference to the accompanying drawings, in which:

[0057] [ Figure 1 ] Figure 1 This is an exploded three-dimensional schematic diagram of an electrochemical cell according to a first embodiment of the present invention;

[0058] [ Figure 2 ] Figure 2 This is a side view of an electrochemical cell according to a first embodiment of the present invention.

[0059] [ Figure 3 ] Figure 3 This is a front view diagram of the electrochemical cell according to the first embodiment of the present invention.

[0060] [ Figure 4 ] Figure 4 This is a schematic side view of an electrochemical cell in an assembled state according to a first embodiment of the present invention;

[0061] [ Figure 5 ] Figure 5 It is along Figure 4 The cross-section of plane VV shown;

[0062] [ Figure 6 ] Figure 6 yes Figure 5 A magnified view of detail VI shown;

[0063] [ Figure 7 ] Figure 7 yes Figures 1 to 6 A schematic diagram showing the details of the battery variant;

[0064] [ Figure 8 ] Figure 8 This is a schematic exploded perspective view of an electrochemical cell according to a second embodiment of the present invention;

[0065] [ Figure 9 ] Figure 9 This is a schematic exploded side view of an electrochemical cell according to a second embodiment of the present invention;

[0066] [ Figure 10 ] Figure 10 This is a schematic exploded front view of an electrochemical cell according to a second embodiment of the present invention;

[0067] [ Figure 11 ] Figure 11 This is a schematic side view of an electrochemical cell in an assembled state according to a second embodiment of the present invention;

[0068] [ Figure 12 ] Figure 12 It is along Figure 11 The sectional view of plane XII-XII shown; and

[0069] [ Figure 13 ] Figure 13 yes Figure 12 A magnified view of detail XIII. Detailed Implementation

[0070] The following description contains the technical features of the present invention. Although such technical features are presented in the technical background and, where appropriate, are combined with other technical features, they can be used individually each time without other technical features, provided that it is technically feasible.

[0071] Figure 1A battery according to the invention is shown, which is generally indicated by reference numeral 2. In the figure, battery 2 is shown in an exploded perspective view.

[0072] Battery 2 is an electrochemical battery used in electric vehicles. However, other applications for Battery 2 are conceivable, such as energy storage, electromigration, aviation, and railways.

[0073] Battery 2 includes a casing 4, a cover 6, and an electrochemical assembly 8.

[0074] Battery 2 and therefore electrochemical component 8 define the following geometric entities:

[0075] PL - Longitudinal Plane - A plane that extends generally parallel to the large surface area of ​​the housing and perpendicular to the bottom of the housing;

[0076] PT - Lateral plane - A plane that extends generally parallel to the small face of the shell and perpendicular to the bottom of the shell;

[0077] PE - Stacked Plane - A plane on which electrode layers are stacked;

[0078] A-Central Axis - An axis that passes through the center of the battery and generally coincides with the line generated by the cross-section of the longitudinal plane PL and the transverse plane PT.

[0079] In this case, the PL / PT / PE planes, or each of them, extend in the corresponding symmetry plane of the battery.

[0080] The cover 6 is provided with an electrical connection terminal having a first polarity 14 and an electrical connection terminal having a second polarity 16. In this case, the cover 6 is a generally rectangular plate.

[0081] The electrochemical assembly 8 includes a first electrochemical element stack 18 having a first electrical connection tab 20. The electrochemical assembly 8 also includes a second electrochemical element stack 22 having a second electrical connection tab 24. Each electrochemical element stack is generally referred to as a "stack".

[0082] The first electrochemical element stack 18 and the second electrochemical element stack 22 are arranged in the housing 4 and are electrically connected to each other in parallel via electrical connections.

[0083] Battery 2 may include any number of electrochemical elements 8.

[0084] The first electrical connection piece 20 consists of an overlay of a metal strip that is connected to or integrally formed with the current collector of the first electrochemical element stack 18. The second electrical connection piece 24 consists of an overlay of a metal strip that is connected to or integrally formed with the current collector of the second electrochemical element stack 22. The above arrangement... Figure 6 The diagram is shown schematically.

[0085] The first electrical connection tab 20 extends substantially parallel to the stack plane PE. The second electrical connection tab 24 extends substantially parallel to the stack plane PE. The term "substantially parallel" means parallel within manufacturing tolerances (e.g., included between 0° and 3°).

[0086] Each or every electrical connection lug is an extended lug and is substantially planar over its entire length.

[0087] The first electrochemical element stack 18 and the second electrochemical element stack 22 extend on both sides of the stack plane PE.

[0088] The first electrical connection piece 20 and / or the second electrical connection piece 24 are arranged on the side furthest from the other electrochemical element stack on the corresponding electrochemical element stack. Therefore, the first electrical connection piece 20 and / or the second electrical connection piece 24 are arranged closer to the free face of the adjacent housing 4 of the electrochemical element stack than to the longitudinal plane PL.

[0089] The electrochemical assembly 6 includes a first common connection element 26 (also referred to as a "current collector") that electrically connects a first electrical connection tab 20 and a second electrical connection tab 24. The first connection element 26 is, for example, composed of a folded metal sheet.

[0090] The common connection element 26 is fastened and electrically connected to the electrical connection terminal 14, and the first electrical connection piece 20 and the second electrical connection piece 24 are electrically connected to the electrical connection terminal 14.

[0091] The first common connection element 26 includes a first electrical connection rib 28 fastened to a first electrical connection tab 20 and a second electrical connection rib 30 fastened to a second electrical connection tab 24. Generally, the thickness of each electrical connection rib is greater than the thickness of the electrical connection tab, and also greater than the thickness of each strip of the electrical connection tab associated with and fastened to that rib.

[0092] The first common connection element 26 includes an electrical connection core 32 disposed between the first electrical connection rib and the second electrical connection rib.

[0093] The electrical connector 32 includes an end portion 34 and a terminal portion 36 offset relative to the end portion 34 toward the electrochemical element stack 22. In this case, the electrical connector 32 is stepped (see [reference needed]). Figure 2 ).

[0094] The first electrical connection rib 28 and the second electrical connection rib 30 are arranged between the first electrical connection piece 20 and the second electrical connection piece 24.

[0095] The first electrical connection rib 28 extends substantially parallel to the stack plane PE. The second electrical connection rib 30 extends substantially parallel to the stack plane PE.

[0096] As in Figure 1 and Figure 2 As can be seen, the first electrical connection rib 28, the first electrical connection tab 20, the second electrical connection rib 30, and the second electrical connection tab 24 are offset from the end 36 and the associated terminal 14, respectively. This results in a compact structure for the battery 2.

[0097] The outer casing 4 is, for example, a cuboid casing made of metal or thermoplastic material. As a variation, the outer casing 4 has a cylindrical shape with a circular cross-section. The outer casing 4 has walls with less deformation than the walls of the electrochemical element stacks 18 and 22.

[0098] In addition, the electrochemical assembly includes a first support member 40, particularly a single piece, which forms a first support element 42 and a second support element 44, and the first support member 40 includes a central core 46 disposed between the first support element and the second support element.

[0099] The first support element 42 and the second support element 44 define a support plane PS that extends perpendicular to the stacking plane PE and perpendicular to the transverse plane PT (see...). Figure 6 The support plane PS is typically the plane where the first support element 42 and the second support element 44 are located.

[0100] A first electrical connection tab 20 is disposed between a first electrical connection rib 28 and a first support element 42. A second electrical connection tab 24 is disposed between a second electrical connection rib 30 and a second support element 44. The first support element 42 and / or the second support element 44 are, for example, support tabs extending specifically parallel to the associated electrical connection tabs 20, 24. In a variation, the first support element 42 and / or the second support element 44 have a shape different from that of the tabs. Generally, the thickness of each support element is greater than the thickness of the electrical connection tab, and greater than the thickness of each strip of the electrical connection tab associated with and fastened to that support element.

[0101] Each support element is adapted to support the electrical connection tab and the associated electrical connection rib during the operation of fastening the electrical connection tab to the associated electrical connection rib. In particular, the support element prevents deformation of the electrical connection tab / rib assembly during welding or brazing. Furthermore, the support element reduces the risk of holes forming in the connection tab during welding or brazing.

[0102] The associated electrical connection ribs, electrical connection terminals, and support elements thus form a sandwich structure.

[0103] In this case, the central core 46 is arranged to be substantially perpendicular to the support plane PS.

[0104] In this configuration, the first electrical connection piece 20 and the second electrical connection piece 24 are arranged between the first support element 42 and the second support element 44 (see [reference]). Figure 6 ).

[0105] The first common connection element 26 is fastened to the first electrical connection piece 20 by material connection, particularly by laser welding.

[0106] The first electrical connection piece 20 is fastened to the first support element 42 by material bonding, particularly by laser welding and especially by bonding with the same material as the first common connection element.

[0107] The first common connection element 26 is fastened to the second electrical connection piece 24 by material connection, particularly by laser welding. The second electrical connection piece 24 is fastened to the second support element 44 by material connection, particularly by laser welding and particularly by material connection of the same material as the first common connection element.

[0108] The electrical connection tabs and electrical connection elements are structured to connect the electrochemical element stack along the central axis AA in a space-saving manner.

[0109] The structure of battery 2 is basically symmetrical.

[0110] The element described above in conjunction with the first polarity also exists for the second polarity.

[0111] More precisely, the first electrochemical element stack 18 is provided with a third electrical connection piece 60 having a second polarity, and the second electrochemical element stack 22 is provided with a fourth electrical connection piece 64 having a second polarity.

[0112] The electrochemical assembly includes a second common connection element 66 that electrically connects a third electrical connection piece 60 and a fourth electrical connection piece 66, and is adapted to electrically connect the third electrical connection piece and the fourth electrical connection piece to an electrical connection terminal 16 having a second polarity.

[0113] The first common connection element 26 and the second common connection element 66 have the same shape. Therefore, the second common connection element 66 has the same structural features as the first common connection element 26.

[0114] The second common connection element 66 includes a third electrical connection rib 68 fastened to the third electrical connection tab 60 and a fourth electrical connection rib 70 fastened to the fourth electrical connection tab 64.

[0115] The second common connection element 66 includes an electrical connection core 72 disposed between the third electrical connection rib and the fourth electrical connection rib.

[0116] The electrical connector 72 includes an end 34 and a terminal portion 76, which is offset relative to the end 34 toward the electrochemical element stack 22. In this case, the electrical connector 72 is stepped (see [reference needed]). Figure 2 ).

[0117] The electrochemical assembly 8 includes a second support member 80, particularly a single piece, which forms a third support element 82 and a fourth support element 84, and includes at least a second central core 86 disposed between the third support element and the fourth support element.

[0118] The third electrical connection piece 60 is arranged between the third electrical connection rib 68 and the third support element, and the fourth electrical connection piece 64 is arranged between the fourth electrical connection rib 70 and the fourth support element.

[0119] The third electrical connection piece 60 and / or the third electrical connection rib extend substantially parallel to the stack plane (PE), and the fourth electrical connection piece 64 and the fourth electrical connection rib extend substantially parallel to the stack plane (PE).

[0120] The first common connection element 26 and the second common connection element 66 are arranged according to a planar symmetry configuration about the plane of symmetry (PT).

[0121] Figure 7 A cross-section of an electrochemical assembly according to a battery variant of the present invention is shown schematically. This variant differs from the one described above only in the following respects. Similar elements have the same reference numerals.

[0122] The first support element 42 and the second support element 44 are arranged between the first electrical connection piece 20 and the second electrical connection piece 24. Furthermore, the first electrical connection piece 20 and the second electrical connection piece 24 are arranged between the first electrical connection rib 28 and the second electrical connection rib 30.

[0123] In other words, the first support member 40 is arranged between the first electrical connection rib 28 and the second electrical connection rib 30. Therefore, this configuration is relative to... Figure 6 The construction shown is the opposite. Furthermore, the first support member 40 advantageously has the shape of a rectangular frame in order to prevent any deformation during the fastening process.

[0124] It should be noted that, as described above, the second support member 80 and the second common connection element 66 may have the same characteristics as... Figure 7 The structure shown or Figure 6 The construction shown is the same as the one shown.

[0125] Figures 8 to 13 A second embodiment of the battery according to the present invention is shown. Figures 8 to 13 Corresponding to Figures 1 to 7 The second embodiment differs from the first embodiment only in the following aspects. Similar elements have the same reference numerals.

[0126] The central core 46 of the first support member 40 is arranged substantially parallel to the support plane PS.

[0127] Similarly, the central core 86 of the second support member 80 is arranged substantially parallel to the support plane PS.

[0128] Therefore, the central cores 46 and 86 are connected along the long edges of the support elements 42, 44 and 82, 84, respectively. In addition, the central cores 46 and 86 cover the ends 34 and 74 of the electrical connection cores 32 and 72, respectively, and extend parallel to them.

[0129] As a variation of the second embodiment, the support elements 42, 44 and / or 82, 84 can be as follows: Figure 7 The arrangement is as shown in the variant.

[0130] In a variation of the above embodiment (not shown), the common connection element (e.g., element 26) includes only one electrical connection rib, such as rib 28. In this case, a single electrochemical element stack is connected to the common connection element, or another electrochemical element stack is connected to the common connection element in other ways than via the electrical connection rib.

[0131] Similarly, a support element may consist of only one support element or may be composed of such a support element.

[0132] This applies, for example, to a battery 2 that consists of only one stack of electrochemical elements.

[0133] In a variant, alternatively or additionally, the or each electrical connection lug and associated electrical connection rib extend relative to the stack plane (PE) at an angle between 0° and 45°.

[0134] The manufacturing method of the electrochemical component as defined above specifically includes the following sequential steps:

[0135] - A first electrochemical element stack 18 is provided, the first electrochemical element stack 18 having a first electrical connection piece 20 having a first polarity.

[0136] - A first common connection element 26 is provided, which is adapted to electrically connect a first electrical connection lug to an electrical connection terminal 14 having a first polarity.

[0137] - The first electrical connection piece 20 is arranged between the first electrical connection rib 28 and the first support element 42.

[0138] - Secure and connect the first electrical connection rib 28 and the first support element 42 to the first electrical connection piece.

[0139] Preferably, during the fastening step, the first electrical connection tab and the first electrical connection rib extend at an angle parallel to or inclined to the stacking plane PE (e.g., between 0° and 60°).

[0140] For the second electrochemical element stack with a second electrical connection piece, and where appropriate, for elements with a second polarity, the same steps are performed.

[0141] In this case, the first electrical connection rib 28 and the first support element 42 are fastened and connected to the first electrical connection piece, and the second electrical connection rib 30 and the second support element 44 are fastened and connected to the second electrical connection piece simultaneously.

[0142] The battery has a compact structure, which results in reliable electrical connections between different components. The battery is also easy and economical to manufacture, especially due to the arrangement of the electrical connection terminals and the characteristics of the common connection elements and support components.

Claims

1. An electrochemical assembly, this type of electrochemical assembly comprising: A first electrochemical element stack (18) is provided with a first electrical connection piece (20) having a first polarity. The first electrochemical element stack extends along the stack plane (PE). First common connection element (26), which is adapted to electrically connect the first electrical connection piece to the electrical connection terminal (14) having the first polarity. The first common connection element includes a first electrical connection rib (28) fastened to the first electrical connection tab. The electrochemical assembly includes a first support element (42). The first electrical connection piece (20) is arranged between the first electrical connection rib (28) and the first support element (42). The electrochemical component includes: The second electrochemical element stack (22) is provided with a second electrical connection piece (24) having the first polarity. The second electrochemical element stack extends along the stack plane (PE). The first common connection element (26) electrically connects the first electrical connection piece and the second electrical connection piece, and is adapted to connect the second electrical connection piece to the electrical connection terminal (14) having the first polarity. The first common connection element (26) includes a second electrical connection rib (30) fastened to the second electrical connection tab, wherein The electrochemical assembly includes a second support element (44). The second electrical connection piece is arranged between the second electrical connection rib and the second support element. The electrochemical assembly is characterized in that it includes a first support member (40) forming a first support element and a second support element, and the first support member (40) includes at least one central core (46) disposed between the first support element and the second support element.

2. The electrochemical component according to claim 1, characterized in that, The first electrical connection tab and the first electrical connection rib extend substantially parallel to the stack plane (PE).

3. The electrochemical component according to claim 1 or 2, characterized in that, The second electrical connection tab and the second electrical connection rib extend substantially parallel to the stack plane (PE).

4. The electrochemical component according to claim 1, characterized in that, The central core is arranged substantially perpendicular to or substantially parallel to the support plane (PS) defined by the first support element and the second support element.

5. The electrochemical component according to claim 1 or 2, characterized in that, The first common connection element (26) is fastened to the first electrical connection piece (20) by material connection or by laser welding, and the first electrical connection piece (20) is fastened to the first support element by material connection or by laser welding. or The first common connection element (26) is fastened to the second electrical connection piece (24) by material connection or by laser welding, and the second electrical connection piece (24) is fastened to the second support element by material connection or by laser welding.

6. The electrochemical component according to claim 1 or 2, characterized in that, The first common connection element (26) includes an electrical connection core (32) disposed between the first electrical connection rib and the second electrical connection rib.

7. The electrochemical component according to claim 6, characterized in that, The electrical connector core (32) is stepped and includes a terminal portion (36) and an end portion (34), the terminal portion being offset relative to the end portion toward the first electrochemical element stack and the second electrochemical element stack.

8. The electrochemical component according to claim 3, characterized in that, The first electrical connection rib (28) and the second electrical connection rib (30) are arranged between the first electrical connection piece and the second electrical connection piece, and The first electrical connection piece and the second electrical connection piece are arranged between the first support element and the second support element.

9. The electrochemical component according to claim 3, characterized in that, The first support element (42) and the second support element (44) are arranged between the first electrical connection piece and the second electrical connection piece, and The first electrical connection piece (20) and the second electrical connection piece (24) are arranged between the first electrical connection rib and the second electrical connection rib.

10. The electrochemical component according to claim 1 or 2, characterized in that, The first electrochemical element stack is provided with a third electrical connection piece (60) having a second polarity, and The second electrochemical element stack is provided with a fourth electrical connection piece (64) having the second polarity. The electrochemical assembly includes a second common connection element (66) that electrically connects the third and fourth electrical connection pieces and is adapted to electrically connect the third and fourth electrical connection pieces to an electrical connection terminal (16) having the second polarity. The second common connection element includes: The third electrical connection rib (68) is fastened to the third electrical connection terminal piece, and The fourth electrical connection rib (70) is fastened to the fourth electrical connection piece, wherein The electrochemical assembly includes a second support member (80) forming a third support element (82) and a fourth support element (84), and the second support member (80) includes at least one central core (86) disposed between the third support element and the fourth support element, wherein The third electrical connection piece is arranged between the third electrical connection rib (68) and the third support element (82), and The fourth electrical connection piece is arranged between the fourth electrical connection rib (70) and the fourth support element (84).

11. The electrochemical assembly according to claim 10, characterized in that, The third electrical connection piece (60) and the third electrical connection rib extend substantially parallel to the stacking plane (PE), and The fourth electrical connection piece (64) and the fourth electrical connection rib extend substantially parallel to the stack plane (PE).

12. The electrochemical assembly according to claim 11, characterized in that, The first common connection element (26) and the second common connection element (66) have the same shape and are arranged according to a planar symmetry configuration about the plane of symmetry (PT).

13. A battery, this type of battery comprising: Outer shell (4) The cover (6) is provided with an electrical connection terminal (14) having a first polarity. Electrochemical component (8) Its features are: The electrochemical component (8) is the electrochemical component according to any one of claims 1-12, and The first common connection element (26) is electrically connected to the electrical connection terminal (14) having the first polarity.

14. The battery according to claim 13, characterized in that, The cover (6) is provided with an electrical connection terminal (16) having a second polarity.

15. A method for manufacturing an electrochemical component according to any one of claims 1 to 12, the method comprising the following steps: A first electrochemical element stack (18) is provided, the first electrochemical element stack (18) being provided with a first electrical connection piece (20) having a first polarity. A first common connection element (26) is provided, which is adapted to electrically connect the first electrical connection lug to the electrical connection terminal (14) having the first polarity. The first electrical connection piece (20) is arranged between the first electrical connection rib (28) and the first support element (42), and Secure and connect the first electrical connection rib (28) and the first support element (42) to the first electrical connection piece.

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