A battery assembly jig and a battery assembly method

Abstract

The application belongs to the technical field of battery manufacturing, and discloses a battery assembling tool and a battery assembling method. The battery assembling tool comprises a positioning member, which can be assembled with the main body structure of the adapter sheet. One side of the positioning member is at least partially attached to the side surface of the main body structure close to the electrode assembly. The positioning member comprises a vertical or substantially vertical connecting plug-in assembly part and a supporting part, and the plug-in assembly part is assembled with the main body structure. The positioning member of the battery assembling tool can stably support and position the adapter sheet during the welding process, ensure the flatness of the adapter sheet during welding, effectively improve the welding effect between the adapter sheet and the tab, and facilitate the welding between the adapter sheet and the tab.

Description

Technical Field

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

[0002] Currently, welding is the most common method used to connect the tab and the adapter plate. During the welding process, welding fixtures are needed to position the adapter plate so that it can be welded to the tab. In existing battery assembly methods, I-shaped fixtures are often used to position and support the adapter plate. However, the support and positioning effect is poor, and the flatness of the adapter plate cannot be guaranteed. This results in poor welding effect between the adapter plate and the tab. Furthermore, the welding heat generated during the welding process can easily be transferred to the tab body, causing damage to the tab. Summary of the Invention

[0003] The purpose of this invention is to provide a battery assembly fixture and a battery assembly method to solve the problems of poor flatness of the adapter piece and poor welding effect between the adapter piece and the electrode tab during the welding process.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] On one hand, a battery assembly fixture is provided, including a positioning member that can be inserted and assembled with the main structure of an adapter piece; one side of the positioning member is at least partially abutted against the surface of the main structure near the electrode assembly; the positioning member includes a vertically or substantially vertically connected insertion part and a support part, the insertion part being inserted and assembled with the main structure. This battery assembly fixture can stably support and position the adapter piece during the welding process. The positioning member of the battery assembly fixture is inserted and snapped into the main structure, ensuring the flatness of the adapter piece during welding, effectively improving the welding effect between the adapter piece and the electrode tab, and facilitating the welding between the adapter piece and the electrode tab.

[0006] Optionally, the insertion part and the support part are vertically connected in a T-shape. A positioning slot is provided on the main structure, and the insertion part is inserted into the positioning slot. One side of the support part is at least partially in contact with the surface of the main structure near the electrode assembly. The thickness of the other side of the support part gradually decreases from the insertion part towards both ends in the width direction. The insertion part can achieve a stable insertion fit with the positioning slot, and the thickness of the support part gradually decreases from the middle towards both ends in the width direction, reducing production material and facilitating the shaping of the electrode tab.

[0007] Optionally, the tab extends from one end of the electrode assembly along its length, and the other side of the support portion at least partially abuts against the extension of the tab along the thickness direction of the electrode assembly. The support portion can shape the extension of the tab along the thickness direction of the electrode assembly, integrate the tab, and reduce the space occupied by the tab.

[0008] Optionally, the battery assembly fixture further includes a fixture base plate, with positioning elements respectively provided at both ends of the fixture base plate. The two positioning elements are located at opposite ends of the electrode assembly along its length, enabling simultaneous positioning of the main structure of the adapter pieces at both ends of the electrode assembly along its length, thereby improving work efficiency.

[0009] On the other hand, a battery assembly method is provided, which uses the above-mentioned battery assembly fixture and includes the following steps:

[0010] The positioning step involves inserting and assembling the positioning component with the main structure of the adapter piece.

[0011] The bending step involves bending the tabs of the electrode assembly.

[0012] In the connection step, the tab is connected and fixed to the side of the main structure opposite to the electrode assembly. This battery assembly method effectively ensures the flatness of the adapter plate during welding, and the battery assembly fixture can conduct the heat generated during welding outward, preventing welding heat from being transferred to the electrode assembly, thus effectively protecting the electrode assembly.

[0013] Optionally, in the bending step, the tab of the electrode assembly is bent around the positioning member and the main structure toward the first side, so that a portion of the tab faces the side of the main structure away from the electrode assembly.

[0014] Optionally, in the bending step, the electrode assembly is provided in two sets, with the two first sides of the two sets of electrode assemblies arranged opposite each other, the tabs of one set of electrode assemblies extending outward from the other set of electrode assemblies, and the tabs of the two sets of electrode assemblies being bent around the two ends of the width direction of the main structure respectively.

[0015] Optionally, in the connection step, the electrode tab is fixed to the main structure by laser welding, which has a fast welding speed and high processing accuracy.

[0016] Optionally, the tab portion includes multiple layers of single-piece tabs, and before the bending step, the multiple layers of single-piece tabs are further subjected to tab pretreatment so that the multiple layers of single-piece tabs are integrated to form the tab portion.

[0017] Optionally, the electrode pretreatment includes ultrasonic pre-welding or hot pressing of the multi-layered single electrode pieces, and then cutting the length of the multi-layered single electrode pieces to form an electrode portion of suitable length.

[0018] The beneficial effects of this invention are:

[0019] The battery assembly fixture of the present invention can stably support and position the adapter piece during the welding process. The positioning part of the battery assembly fixture is inserted and snapped into the main structure to ensure the flatness of the adapter piece during welding, effectively improve the welding effect between the adapter piece and the electrode tab, and facilitate the welding between the adapter piece and the electrode tab.

[0020] In the battery assembly method of the present invention, the above-mentioned battery assembly fixture and adapter piece are used for assembly during the welding process. The electrode tab is connected and fixed to the main structure around the battery assembly fixture. The battery assembly fixture can effectively support the adapter piece and ensure the flatness of the adapter piece during welding. The battery assembly fixture can conduct the heat generated during welding outward and will not transfer the welding heat to the direction of the electrode assembly, thus effectively protecting the electrode assembly. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the battery assembly fixture described in an embodiment of the present invention;

[0022] Figure 2 yes Figure 1 A cross-sectional view along the AA direction;

[0023] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle;

[0024] Figure 4 This is a front view of the structure of the adapter piece according to an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the assembly between the battery assembly tooling and the adapter piece according to an embodiment of the present invention;

[0026] Figure 6 yes Figure 5 A cross-sectional view along the BB direction;

[0027] Figure 7 yes Figure 6 A magnified view of a portion of point B in the middle;

[0028] Figure 8 This is a schematic diagram of the installation of the battery assembly tooling, adapter piece and electrode assembly according to an embodiment of the present invention;

[0029] Figure 9 yes Figure 8 A cross-sectional view along the CC direction;

[0030] Figure 10 yes Figure 9 A magnified view of a portion of point C.

[0031] In the picture:

[0032] 1. Battery assembly fixture; 11. Positioning component; 111. Insertion part; 112. Support part; 12. Fixture base plate;

[0033] 2. Adapter plate; 21. Main structure; 211. Positioning joint;

[0034] 3. Electrode assembly; 31. Electrode tab; 32. First side surface. Detailed Implementation

[0035] 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 components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0036] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] In the description of this invention, unless otherwise expressly 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 being 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 being 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.

[0038] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0039] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0040] like Figures 1-3 As shown, the present invention provides a battery assembly fixture, including a positioning member 11. The positioning member 11 can be inserted and assembled with the main structure 21 of the adapter piece 2 during the welding process to position the adapter piece 2 (e.g., ...). Figures 5-7 As shown, one side of the positioning member 11 is at least partially attached to the surface of the main structure 21 near the electrode assembly 3. The positioning member 11 includes a vertically or substantially vertically connected insertion part 111 and a support part 112. The insertion part 111 is inserted and assembled with the main structure 21. In this embodiment, the insertion part 111 is inserted and snapped into the main structure 21 to ensure the flatness of the main structure 21 of the adapter piece 2 during welding, and to ensure the improved welding quality and welding effect between the adapter piece 2 and the electrode tab 31. The positioning member 11 is made of a high-strength, high-temperature resistant, and high-thermal-resistance material. During welding, the positioning member 11 can also effectively block the welding heat to prevent the heat generated during welding from being transferred to the direction of the electrode assembly 3 and causing damage to the electrode assembly 3.

[0041] Optionally, the insertion part 111 and the support part 112 are vertically connected in a T-shape. A positioning slot 211 is provided on the main structure 21, and the insertion part 111 is inserted into the positioning slot 211. One side of the support part 112 is at least partially in contact with the surface of the main structure 21 near the electrode assembly 3, and the thickness of the other side of the support part 112 gradually decreases from the insertion part 111 towards both ends in the width direction of the support part 112. In this embodiment, as... Figure 3 As shown, the insertion part 111 and the support part 112 are vertically connected in a T-shape. A positioning slot 211 is provided on the main structure 21 of the adapter piece 2, as shown... Figure 4 As shown, the positioning seam 211 extends along the length of the main structure 21, and the insertion part 111 can be inserted into the positioning seam 211 to assemble the positioning adapter piece 2, in conjunction with the attached reference. Figure 7 The thickness of the support portion 112 gradually decreases from the middle to both ends in the width direction, which reduces the amount of production material and facilitates the shaping of the tab portion 31. In this embodiment, the opening width and length of the positioning slot 211 are related to the size of the insertion portion 111 to ensure stable insertion between the insertion portion 111 and the positioning slot 211. The surface of the support portion 112 that fits against the main structure 21 is flat to ensure the flatness of the main structure 21 after insertion.

[0042] The tab 31 extends from one end of the electrode assembly 3 along its length, and the other side of the support 112 is at least partially attached to the extension of the tab 31 along the thickness direction of the electrode assembly 3.

[0043] Combined with reference to the appendix Figure 10 , attached Figure 10The horizontal arrow points in the direction of the length of the electrode assembly 3, and the vertical arrow points in the direction of the thickness of the electrode assembly 3. When the tab 31 is connected to the main body structure 21, the tab 31 extends from one end of the electrode assembly 3 along its length and bends around the support 112 and the main body structure 21 toward the first side surface 32. The first side surface 32 is the first large plane along the length of the electrode assembly 3, as shown below. Figure 10 As shown. The other side of the support portion 112, whose thickness gradually decreases, is at least partially in contact with the extension portion of the tab portion 31 along the thickness direction of the electrode assembly 3. The support portion 112 can shape the extension portion of the tab portion 31 along the thickness direction of the electrode assembly 3, and can integrate the tab portion 31, reducing the space ratio of the tab portion 31.

[0044] Optionally, the battery assembly fixture also includes a fixture base plate 12, with positioning elements 11 at both ends of the fixture base plate 12. Figures 1-2 As shown, the battery assembly fixture of this embodiment includes two positioning components 11. The two positioning components 11 are connected by a fixture base plate 12. The two positioning components 11 are located at both ends of the electrode assembly 3 along its length, and can simultaneously position the main structure 21 of the adapter piece 2 at both ends of the electrode assembly 3 along its length, thereby improving work efficiency.

[0045] This embodiment also provides a battery assembly method, which uses the battery assembly fixture 1 described above, and specifically includes the following steps:

[0046] The positioning step involves inserting and assembling the positioning component 11 with the main structure 21 of the adapter piece 2.

[0047] Bending step: bend the tab 31 of electrode assembly 3;

[0048] In this step, such as Figures 8-10 As shown, the positioning members 11 are located at both ends of the electrode assembly 3 along its length, and the tabs 31 are bent toward the first side 32. The tabs 31 wrap around the positioning members 11 and the main structure 21 and then fit against the side of the main structure 21 that is away from the electrode assembly 3.

[0049] In the connection step, the tab 31 is connected and fixed to the side of the main body structure 21 that is away from the electrode assembly 3.

[0050] In this step, the connection between the tab 31 and the main body structure 21 can be achieved by laser welding, which offers high welding speed and processing precision. Alternatively, the connection between the tab 31 and the main body structure 21 can also utilize connection methods other than resistance welding, such as ultrasonic welding or soldering, and is not limited to those described in this embodiment.

[0051] Optionally, in the bending step of the battery assembly method, such as Figure 9 and Figure 10As shown, the electrode assembly 3 is provided in two sets. The two first sides 32 of the two sets of electrode assemblies 3 are arranged opposite each other. The tabs 31 of one set of electrode assemblies 3 are led out in a direction away from the other set of electrode assemblies 3. The tabs 31 of the two sets of electrode assemblies 3 are bent relative to each other around the two ends of the main body structure 21 in the width direction. An adapter piece 2 is connected to the two tabs 31 at the same end of the two sets of electrode assemblies 3.

[0052] Optionally, the tab portion 31 includes multiple layers of single-piece tabs. Before the bending step, the multiple layers of single-piece tabs are pre-treated to integrate them into the tab portion 31. It is understood that the tab portion 31 is formed by integrating multiple layers of single-piece tabs, and pre-treatment is required before bending the tab portion 31. The pre-treatment method includes ultrasonic pre-welding or hot pressing of the multiple layers of single-piece tabs, followed by trimming the length of the treated multiple layers of single-piece tabs to form a tab portion 31 of suitable length.

[0053] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A battery assembly fixture, characterized in that, Includes a positioning element (11) that can be inserted and assembled with the main structure (21) of the adapter piece (2); one side of the positioning element (11) is at least partially attached to the side surface of the main structure (21) near the electrode assembly (3); the positioning element (11) includes a vertically or substantially vertically connected insertion part (111) and a support part (112), and the insertion part (111) is inserted and assembled with the main structure (21); The insertion part (111) and the support part (112) are vertically connected in a T-shape. The main structure (21) has a positioning slot (211). The insertion part (111) is inserted into the positioning slot (211). One side of the support part (112) is at least partially attached to the surface of the main structure (21) near the electrode assembly (3). The thickness of the other side of the support part (112) gradually decreases from the insertion part (111) to both ends of the width direction of the support part (112).

2. The battery assembly fixture according to claim 1, characterized in that, The tab (31) extends from one end of the electrode assembly (3) along its length, and the other side of the support (112) is at least partially attached to the extension of the tab (31) along the thickness direction of the electrode assembly (3).

3. The battery assembly fixture according to claim 1, characterized in that, The battery assembly fixture also includes a fixture base plate (12), and the positioning elements (11) are respectively provided at both ends of the fixture base plate (12).

4. A battery assembly method, characterized in that, Using the battery assembly fixture according to any one of claims 1-3 includes the following steps: The positioning step involves inserting and assembling the positioning component (11) with the main structure (21) of the adapter piece (2); Bending step: bend the tab (31) of the electrode assembly (3); In the connection step, the tab (31) is connected and fixed to the side of the main body structure (21) away from the electrode assembly (3).

5. The battery assembly method according to claim 4, characterized in that, In the bending step, the tab (31) of the electrode assembly (3) is bent toward the first side (32) around the positioning member (11) and the main body structure (21), so that a part of the tab (31) faces the main body structure (21) away from the side of the electrode assembly (3).

6. The battery assembly method according to claim 5, characterized in that, In the bending step, the electrode assembly (3) is provided in two sets, and the two first sides (32) of the two sets of electrode assemblies (3) are arranged opposite to each other. The tabs (31) of one set of electrode assemblies (3) are led out in a direction away from the other set of electrode assemblies (3). The tabs (31) of the two sets of electrode assemblies (3) are bent around the two ends of the width direction of the main structure (21).

7. The battery assembly method according to claim 4, characterized in that, In the connection step, the tab (31) is fixed to the main structure (21) by laser welding.

8. The battery assembly method according to claim 4, characterized in that, The tab portion (31) includes multiple monolithic tabs. Before the bending step, the multiple monolithic tabs are pre-treated to integrate them into the tab portion (31).

9. The battery assembly method according to claim 8, characterized in that, The electrode pretreatment includes ultrasonic pre-welding or hot pressing of the multi-layered single electrode pieces, and then cutting the length of the multi-layered single electrode pieces to form an electrode part (31) of appropriate length.

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