Battery assembly method and current collecting member

Abstract

The application discloses a battery assembling method and a current collecting component, and belongs to the technical field of batteries. The battery assembling method and the current collecting component. The battery assembling method comprises the following steps: a tool positioning step: assembling the current collecting component, clamping the first matching part of the current collecting component by using a first assembling tool, and / or clamping the second matching part of the current collecting component by using a second assembling tool; a connecting step: fixedly connecting the tab and the current collecting component. The first matching part is arranged in correspondence with the opening of the tab, and is equivalent to being arranged on the side of the main body part. The first matching part is clamped by the first assembling tool through the opening of the tab, and / or the second matching part integrally formed on one end of the main body part is clamped by the second assembling tool, so that the arrangement of the battery cell and other components is not affected, the battery cell does not need to be shaped after the assembling tool is removed, and the battery assembling efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to a battery assembly method and a current collector. Background Technology

[0002] During battery assembly, the tabs need to be bent to connect them to the current collector. During the bending process, assembly fixtures are used to support and fix the current collector. This ensures that the relative positions of the current collector and the tabs do not change, thus improving the assembly accuracy. It also prevents the current collector from deforming, which could affect battery performance.

[0003] In existing technologies, assembly fixtures can affect cell arrangement. After removing the fixtures, the cells need to be reshaped, resulting in low battery assembly efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a battery assembly method and current collector that does not affect the arrangement of battery components and can improve battery assembly efficiency.

[0005] To achieve the above objectives, the following technical solution is provided:

[0006] On one hand, a battery assembly method is provided, wherein the battery includes a current collector and an electrode assembly, the electrode assembly includes a tab with an opening; the current collector includes a main body and a first mating part corresponding to the opening, the first mating part being integrally formed on the main body; and / or, the current collector further includes a second mating part, the second mating part being integrally formed on one end of the main body;

[0007] The battery assembly method includes the following steps:

[0008] Tooling positioning steps: Assemble the current collector component, using a first assembly tool to clamp the first mating part of the current collector component, and / or using a second assembly tool to clamp the second mating part of the current collector component;

[0009] Connection steps: Securely connect the electrode tab to the current collector component.

[0010] As an alternative to the battery assembly method, the opening divides the tab into two tab branches; the main body has a tab connection surface on the side away from the electrode assembly that corresponds to the tab branches;

[0011] In the connection step, the tab branch is wrapped around the main body to the side away from the electrode assembly, and the tab branch is fixedly connected to the corresponding tab connection surface.

[0012] As an alternative to the battery assembly method, there are two first mating parts, and the two first mating parts are respectively located on both sides of the main body along the second direction;

[0013] In the tooling positioning step, the two first assembly toolings are used to clamp the two first mating parts respectively.

[0014] As an alternative to the battery assembly method, the first mating part is provided with a first positioning structure; the first assembly fixture is provided with a second positioning structure corresponding to the first positioning structure.

[0015] In the tooling positioning step, the first positioning structure is inserted into the second positioning structure.

[0016] On the other hand, a current collection component is provided, the current collection component comprising:

[0017] The main body portion has a first end and a second end that are opposite each other along a first direction;

[0018] The connecting part is connected to the first end of the main body;

[0019] The current collection component further includes a first mating part, which is integrally formed on one side of the main body along a second direction, the second direction being perpendicular to the first direction;

[0020] And / or, the current collection component further includes a second mating part, which is integrally formed on the second end of the main body.

[0021] As an optional solution for the current collection component, there are two first mating parts, and the two first mating parts are integrally formed on both sides of the main body along the second direction.

[0022] As an optional solution for the current collection component, the main body is provided with two electrode connecting surfaces on both sides along the second direction. All the electrode connecting surfaces are located on the side of the main body away from the electrode assembly, and the two electrode connecting surfaces located on the same side of the main body are respectively located on both sides of the first mating part.

[0023] As an alternative to the current collection component, the first mating part is located in the middle of the main body part along the first direction.

[0024] As an optional solution for the current collecting component, a gap is provided between the side of the first mating part near the electrode assembly and the side of the main body part near the electrode assembly;

[0025] A gap is provided between the side of the second mating part near the electrode assembly and the side of the main body part near the electrode assembly.

[0026] As an alternative to the current collecting component, the first mating portion is recessed to the side away from the electrode assembly, and the thickness of the mating portion is less than the thickness of the main body portion;

[0027] The second mating portion is recessed towards the side away from the electrode assembly, and the thickness of the mating portion is less than the thickness of the main body portion.

[0028] As an alternative to the current collector, the second mating part has a reinforcing protrusion on the side near the electrode assembly, and the reinforcing protrusion is connected to the main body.

[0029] As an optional solution for the current collection component, the first mating part is provided with a first positioning groove;

[0030] The main body is provided with a second positioning groove corresponding to the first mating part;

[0031] The second mating part is provided with a third positioning groove;

[0032] The main body is provided with a fourth positioning groove corresponding to the second mating part.

[0033] As an optional solution for the current collection component, the main body is provided with a reinforcing structure, which includes a main reinforcing rib extending along the first direction, and two auxiliary reinforcing ribs are connected to both ends of the main reinforcing rib.

[0034] As an optional solution for the current collection component, the auxiliary reinforcing rib and the main reinforcing rib are provided with an included angle θ, where θ is an obtuse angle.

[0035] As an optional solution for the current collection component, an included angle α is provided between the two auxiliary reinforcing ribs located at the same end of the main body, where 30°≤α≤150°.

[0036] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0037] The battery assembly method and current collector of the present invention have a first mating part corresponding to the opening of the tab, which is equivalent to the first mating part being disposed on the side of the main body. The first mating part is clamped by a first assembly tool passing through the opening of the tab, and / or the second mating part integrally formed on one end of the main body is clamped by a second assembly tool. This does not affect the arrangement of components such as the battery cell, and there is no need to reshape the battery cell after removing the assembly tool, which is beneficial to improving battery assembly efficiency. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of the first type of current collection component in an embodiment of the present invention. Figure 1 ;

[0039] Figure 2 This is a schematic diagram of the structure of the first type of current collection component in an embodiment of the present invention. Figure 2;

[0040] Figure 3 This is a schematic diagram illustrating the assembly relationship between the first type of current collection component and the first assembly fixture in an embodiment of the present invention.

[0041] Figure 4 This is a schematic diagram of the structure of the second type of current collection component in an embodiment of the present invention;

[0042] Figure 5 This is a schematic diagram illustrating the assembly relationship between the second type of current collection component and the first and second assembly fixtures in an embodiment of the present invention.

[0043] Figure 6 This is an exploded view of the second type of current collection component, the first assembly fixture, and the second assembly fixture in an embodiment of the present invention;

[0044] Figure 7 This is a schematic diagram of the structure of the third type of current collection component in an embodiment of the present invention;

[0045] Figure 8 This is a schematic diagram illustrating the assembly relationship between the third type of current collection component and the first and second assembly fixtures in an embodiment of the present invention.

[0046] Figure 9 This is an exploded view of the third type of current collection component, the first assembly fixture, and the second assembly fixture in an embodiment of the present invention;

[0047] Figure 10 This is a schematic diagram illustrating the assembly relationship between the third current collector and the electrode assembly in an embodiment of the present invention. Figure 1 ;

[0048] Figure 11 This is a schematic diagram illustrating the assembly relationship between the third current collector and the electrode assembly in an embodiment of the present invention. Figure 2 ;

[0049] Figure 12 This is a schematic diagram of the structure of the fourth type of current collection component in this embodiment of the invention. Figure 1 ;

[0050] Figure 13 This is a schematic diagram of the structure of the fourth type of current collection component in this embodiment of the invention. Figure 2 ;

[0051] Figure 14 This is a schematic diagram illustrating the assembly relationship between the fourth type of current collection component and the first assembly fixture in an embodiment of the present invention.

[0052] Figure label:

[0053] 1. Current collector component; 11. Main body; 111. First end; 112. Second end; 113. Second positioning groove; 114. Fourth positioning groove; 1151. Main reinforcing rib; 1152. Auxiliary reinforcing rib; 116. Electrode connecting surface; 12. Connecting part; 13. First mating part; 131. First positioning groove; 14. Second mating part; 141. Reinforcing protrusion; 142. Third positioning groove; 2. Electrode assembly; 21. Electrode; 211. Opening; 212. Electrode support; 3. First assembly fixture; 31. First clamping part; 311. First clamping cavity; 312. Second positioning protrusion; 32. First fixing part; 4. Second assembly fixture; 41. Second clamping part; 411. Second clamping cavity; 412. Third positioning protrusion; 413. Fourth positioning protrusion; 414. Positioning groove; 42. Second fixing part. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0055] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0056] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0057] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0058] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0059] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0060] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0061] like Figure 1-14 As shown, this embodiment provides a current collecting component 1, which includes a main body 11 and a connecting part 12. The main body 11 has a first end 111 and a second end 112 that are opposite each other along a first direction. The connecting part 12 is connected to the first end 111 of the main body 11. The current collecting component 1 also includes a first mating part 13, which is integrally formed on one side of the main body 11 along a second direction, and the second direction is perpendicular to the first direction. The current collecting component 1 also includes a second mating part 14, which is integrally formed on the second end 112 of the main body 11.

[0062] The first mating part 13 is located on the side of the main body 11, and the second mating part 14 is located at the end of the main body 11. The first mating part 13 and the second mating part 14 are clamped by the corresponding assembly fixtures, which will not affect the arrangement of components such as the battery cell, and there is no need to reshape the battery cell after removing the assembly fixtures, which is conducive to improving battery assembly efficiency.

[0063] In one embodiment, two first mating parts 13 are provided, and the two first mating parts 13 are integrally formed on both sides of the main body 11 along the second direction. By clamping the two first mating parts 13 with two assembly fixtures respectively, the current collecting member 1 can be fixed more securely.

[0064] In one embodiment, both first mating parts 13 are located in the middle of the main body 11 along the first direction, which can improve the positioning stability of the main body 11 and improve the assembly accuracy of the tab 21 and the main body 11.

[0065] In one embodiment, a gap is provided between the side of the first mating part 13 near the electrode assembly 2 and the side of the main body part 11 near the electrode assembly 2; a gap is also provided between the side of the second mating part 14 near the electrode assembly 2 and the side of the main body part 11 near the electrode assembly 2. The gaps are provided to accommodate the corresponding assembly fixtures and to prevent the assembly fixtures from interfering with the battery cell and the current collector 1.

[0066] In one embodiment, the first mating portion 13 is recessed towards the side away from the electrode assembly 2, and the thickness of the mating portion is less than the thickness of the main body portion 11. In other words, the side of the first mating portion 13 away from the electrode assembly 2 is flush or substantially flush with the main body portion 11, and the distance between the side of the first mating portion 13 near the electrode assembly 2 and the electrode assembly 2 is greater than the distance between the side of the main body portion 11 near the electrode assembly 2 and the electrode assembly 2. Similarly, the second mating portion 14 is recessed towards the side away from the electrode assembly 2, and the thickness of the mating portion is less than the thickness of the main body portion 11. In other words, the side of the second mating portion 14 away from the electrode assembly 2 is flush or substantially flush with the main body portion 11, and the distance between the side of the second mating portion 14 near the electrode assembly 2 and the electrode assembly 2 is greater than the distance between the side of the main body portion 11 near the electrode assembly 2 and the electrode assembly 2. This arrangement allows for space to accommodate the assembly tooling between the first mating portion 13 and the electrode assembly 2, and between the second mating portion 14 and the electrode assembly 2, thereby preventing the assembly tooling from interfering with the electrode assembly 2 and the current collector 1.

[0067] In one embodiment, the second mating part 14 is provided with a reinforcing protrusion 141 on the side near the electrode assembly 2. The reinforcing protrusion 141 is connected to the main body part 11, and the strength of the second mating part 14 is increased by the reinforcing protrusion 141.

[0068] In one embodiment, the first mating part 13 is provided with a first positioning groove 131; the main body part 11 is provided with a second positioning groove 113 corresponding to the first mating part 13; the second mating part 14 is provided with a third positioning groove 142; and the main body part 11 is provided with a fourth positioning groove 114 corresponding to the second mating part 14. By inserting the above positioning grooves into the positioning protrusions on the corresponding assembly tooling, a positioning function is achieved, further ensuring that the assembly tooling stably clamps the current collecting member 1 and improves the assembly accuracy of the current collecting member 1 and the electrode tab 21.

[0069] In one embodiment, the main body 11 is provided with a reinforcing structure, which includes a main reinforcing rib 1151 extending along a first direction, and two auxiliary reinforcing ribs 1152 connected to both ends of the main reinforcing rib 1151. The reinforcing structure improves the strength of the main body 11 and prevents deformation of the main body 11.

[0070] In one embodiment, an angle θ, where θ is an obtuse angle, is provided between the auxiliary reinforcing rib 1152 and the main reinforcing rib 1151. This arrangement can enhance the reinforcing effect of the auxiliary reinforcing rib 1152 on the strength of both ends of the main body 11.

[0071] In one embodiment, an included angle α is provided between two auxiliary reinforcing ribs 1152 located at the same end of the main body 11, where 30°≤α≤150°, to enhance the reinforcing effect of the auxiliary reinforcing ribs 1152 on the strength of both ends of the main body 11.

[0072] This embodiment also provides a battery, which includes the above-mentioned current collector 1 and electrode assembly 2. The electrode assembly 2 is provided with tabs 21, and the tabs 21 are provided with openings 211. The connecting part 12 is provided correspondingly to the openings 211.

[0073] In one embodiment, the battery includes two opposing battery cells. Each battery cell has tabs 21 at both ends along its length. Each tab 21 has an opening 211, dividing it into two tab branches 212. Correspondingly, the main body 11 has two tab connecting surfaces 116 on both sides along the second direction. All tab connecting surfaces 116 are located on the side of the main body 11 away from the electrode assembly 2. The two tab connecting surfaces 116 on the same side of the main body 11 are located on opposite sides of the first mating part 13. This allows the tab branches 212 to be fixedly connected to the corresponding tab connecting surfaces 116 on the side of the main body 11 away from the electrode assembly 2. The main body 11 provides support and fixation for the tabs 21, ensuring the stability of the connection between the main body 11 and the tabs 21.

[0074] This embodiment also provides a battery assembly method, including the following steps:

[0075] Tooling positioning steps: Assemble the current collector 1, use the first assembly tool 3 to clamp the first mating part 13 of the current collector 1, and use the second assembly tool 4 to clamp the second mating part 14 of the current collector 1.

[0076] Connection steps: Fix the tab 21 to the current collector 1.

[0077] The first mating part 13 is correspondingly provided with the opening 211 of the tab 21, which is equivalent to the first mating part 13 being provided on the side of the main body 11. The first assembly tool 3 is used to clamp the first mating part 13 through the opening 211 of the tab 21, and the second assembly tool 4 is used to clamp the second mating part 14 integrally formed on one end of the main body 11. This will not affect the arrangement of components such as the battery cell, and there is no need to reshape the battery cell after removing the assembly tool, which is beneficial to improving battery assembly efficiency.

[0078] It should be noted that in other embodiments, the current collector 1 may only have a first mating part 13. Correspondingly, in the tooling positioning step, only the first mating part 13 of the current collector 1 can be clamped by the first assembly tool 3. Of course, the current collector 1 may also only have a second mating part 14. In the tooling positioning step, only the second assembly tool 4 can be clamped by the second mating part 14 of the current collector 1. Similarly, the purpose of fixing the current collector 1 can be achieved by clamping the first mating part 13 or the second mating part 14 by the corresponding assembly tool, and the battery assembly efficiency can be improved.

[0079] The tab support 212 and the tab connection surface 116 are arranged in a one-to-one correspondence. In the connection step, the tab support 212 is wrapped around to the side of the main body 11 away from the electrode assembly 2, and the tab support 212 is fixedly connected to the corresponding tab connection surface 116, which improves the assembly accuracy of the tab 21 and the main body 11.

[0080] Corresponding to the two first mating parts 13, in the tooling positioning step, the two first assembly toolings 3 are used to clamp the two first mating parts 13 respectively, so as to more stably position the current collector 1 and improve the assembly accuracy of the main body 11 and the electrode 21.

[0081] In one embodiment, the first mating part 13 is provided with a first positioning structure; the first assembly fixture 3 is provided with a second positioning structure corresponding to the first positioning structure; in the fixture positioning step, the first positioning structure and the second positioning structure are inserted into each other, which can prevent the first mating part 13 from being displaced relative to the first assembly fixture 3, and ensure the stable positioning of the current collecting component 1. It should be noted that the first positioning structure can be the first positioning groove 131 provided in the first mating part 13, and correspondingly, the second positioning structure is the positioning protrusion provided in the first assembly fixture 3. When the first assembly fixture 3 clamps the first mating part 13, the positioning protrusion is inserted into the first positioning groove 131; of course, the first positioning structure can also be a positioning protrusion, and correspondingly, the second positioning structure is a positioning groove.

[0082] In one embodiment, the first assembly fixture 3 includes a first clamping part 31 and a first fixing part 32. The first clamping part 31 is used to clamp the first mating part 13, and the first fixing part 32 is used to connect with the fixture mechanism to support and fix the first assembly fixture 3.

[0083] In one embodiment, the first clamping part 31 includes a first clamping cavity 311, which can be inserted into the first mating part 13.

[0084] In one embodiment, the sidewall of the first clamping cavity 311 is provided with a first positioning protrusion corresponding to the first positioning groove 131 and a second positioning protrusion 312 corresponding to the second positioning groove 113. The first positioning protrusion can be inserted into the first positioning groove 131 and the second positioning protrusion 312 can be inserted into the second positioning groove 113 to prevent relative displacement between the main body 11 and the first assembly fixture 3.

[0085] In one embodiment, the second assembly fixture 4 includes a second clamping part 41 and a second fixing part 42. The second clamping part 41 is used to clamp the second mating part 14, and the second fixing part 42 is used to connect with the fixture mechanism to support and fix the second assembly fixture 4.

[0086] In one embodiment, the second clamping part 41 includes a second clamping cavity 411, which can be inserted into the second mating part 14. Further, the sidewall of the second clamping cavity 411 is provided with a third positioning protrusion 412 corresponding to the third positioning groove 142 and a fourth positioning protrusion 413 corresponding to the fourth positioning groove 114. The third positioning protrusion 412 can be inserted into the third positioning groove 142, and the fourth positioning protrusion 413 can be inserted into the fourth positioning groove 114 to prevent relative displacement between the main body part 11 and the second assembly fixture 4.

[0087] In one embodiment, the sidewall of the second clamping cavity 411 may also be provided with a positioning groove 414 corresponding to the reinforcing protrusion 141, so that the reinforcing protrusion 141 can be inserted into the positioning groove 414, which can also limit the relative displacement between the main body 11 and the second assembly tool 4.

[0088] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A method of assembling a battery, characterized by, The battery comprises a current collecting member (1) and an electrode assembly (2), the electrode assembly (2) comprises a tab (21) provided with an opening (211) for dividing the tab (21) into two tab branches (212); the current collecting member (1) comprises a main body (11) and a first matching part (13) provided corresponding to the opening (211), the first matching part (13) is integrally formed on the main body (11); The battery assembling method comprises the following steps: The tool positioning step: assembling the current collecting member (1), using the first assembling tool (3) to clamp the first matching part (13) of the current collecting member (1) through the opening (211) of the tab (21); The connecting step: fixedly connecting the tab (21) and the current collecting member (1).

2. The battery assembling method according to claim 1, wherein The current collecting member (1) further comprises a second matching part (14), the second matching part (14) is integrally formed on one end of the main body (11); The tool positioning step further comprises: using the second assembling tool (4) to clamp the second matching part (14) of the current collecting member (1).

3. The battery assembly method of claim 1, wherein, The main body (11) is provided with a tab connecting surface (116) corresponding to the tab branch (212) on the side away from the electrode assembly (2); In the connecting step, the tab branch (212) is wound to the side of the main body (11) away from the electrode assembly (2), and the tab branch (212) is fixedly connected with the corresponding tab connecting surface (116).

4. The battery assembly method of claim 1, wherein, The first matching part (13) is provided with two, and the two first matching parts (13) are respectively located on the two sides of the main body (11) along the second direction; In the tool positioning step, two first assembling tools (3) are used to clamp the two first matching parts (13) respectively.

5. The battery assembly method of claim 1, wherein, The first matching part (13) is provided with a first positioning structure; the first assembling tool (3) is provided with a second positioning structure corresponding to the first positioning structure; In the tool positioning step, the first positioning structure is inserted with the second positioning structure.

6. A current collecting member, the current collecting member (1) comprises: A main body (11) having a first end (111) and a second end (112) opposite to each other along a first direction; A connecting part (12) connected to the first end (111) of the main body (11); Characterized in that, The current collecting member (1) further comprises a first matching part (13), the first matching part (13) is integrally formed on one side of the main body (11) along a second direction, and the second direction is perpendicular to the first direction; The side of the first matching part (13) close to the electrode assembly (2) and the side of the main body (11) close to the electrode assembly (2) are provided with a gap.

7. The current collecting member according to claim 6, characterized by The current collecting member (1) further comprises a second matching part (14), the second matching part (14) is integrally formed on the second end (112) of the main body (11).

8. The current collecting member according to claim 6, characterized by The first matching part (13) is provided with two, and the two first matching parts (13) are integrally formed on the two sides of the main body part (11) along the second direction.

9. The current collecting member according to claim 8, characterized by The main body part (11) is provided with two tab connecting surfaces (116) on the two sides along the second direction, all the tab connecting surfaces (116) are located on the side of the main body part (11) away from the electrode assembly (2), and the two tab connecting surfaces (116) located on the same side of the main body part (11) are located on the two sides of the first matching part (13) respectively.

10. The current collecting member according to claim 6, characterized by The first matching part (13) is located in the middle of the main body part (11) along the first direction.

11. The current collecting member according to claim 7, characterized by The second matching part (14) is provided with a gap between the side close to the electrode assembly (2) and the side close to the electrode assembly (2) of the main body part (11).

12. The current collecting member according to claim 7, characterized by The first matching part (13) is recessed to the side away from the electrode assembly (2), and the thickness of the matching part is less than the thickness of the main body part (11); The second matching part (14) is recessed to the side away from the electrode assembly (2), and the thickness of the matching part is less than the thickness of the main body part (11).

13. The current collecting member according to claim 12, characterized by The second matching part (14) is provided with a reinforcing protrusion (141) on the side close to the electrode assembly (2), and the reinforcing protrusion (141) is connected to the main body part (11).

14. The current collecting member according to claim 12, characterized by The first matching part (13) is provided with a first positioning groove (131); The main body part (11) is provided with a second positioning groove (113) corresponding to the first matching part (13); The second matching part (14) is provided with a third positioning groove (142); The main body part (11) is provided with a fourth positioning groove (114) corresponding to the second matching part (14).

15. The current collecting member according to claim 6, characterized by The main body part (11) is provided with a reinforcing structure, the reinforcing structure includes a main reinforcing rib (1151) extending along the first direction, and both ends of the main reinforcing rib (1151) are connected with two auxiliary reinforcing ribs (1152).

16. The current collecting member according to claim 15, characterized by An included angle θ is provided between the auxiliary reinforcing rib (1152) and the main reinforcing rib (1151), and θ is an obtuse angle.

17. The current collecting member according to claim 16, characterized by An included angle α is provided between the two auxiliary reinforcing ribs (1152) located on the same end of the main body part (11), and 30°≤α≤150°.

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