A battery assembly method

Abstract

The application belongs to the technical field of battery manufacturing, and discloses a battery assembling method, which comprises a positioning step, a connecting step and a bending step. In the positioning step, the adapter piece tool is assembled with the main body structure of the adapter piece. In the connecting step, the tab part is led out from one end of the electrode assembly in the length direction and connected with the wing structure. In the bending step, the wing structure and the tab part are bent. In the battery assembling method, the adapter piece tool is assembled with the main body structure of the adapter piece, so that the assembly is reliable and stable. When the wing structure of the adapter piece is bent, the adapter piece tool can stably support the main body structure of the adapter piece, so that reliable bending of the wing structure is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery manufacturing, in particular to a battery assembling method. BACKGROUND

[0002] At present, after the wing structure welding of the tab and the adapter piece, the bending needs to be performed under the cooperation of the adapter piece tooling. At present, when the wing structure of the adapter piece is bent, the I-shaped adapter piece tooling is used to position and support the adapter piece. The I-shaped adapter piece tooling is in abutting contact with the adapter piece, the connection between the adapter piece tooling and the adapter piece is unreliable, the supporting and positioning effect is poor, the flatness of the adapter piece cannot be guaranteed, and when the wing structure is bent, the supporting stability is not strong, which affects the bending effect between the wing structure and the tab. SUMMARY

[0003] The present application aims to provide a battery assembling method to solve the problem of unreliable connection between the adapter piece tooling and the adapter piece and poor supporting and positioning effect.

[0004] To achieve this purpose, the present application adopts the following technical solutions:

[0005] A battery assembling method comprises the following steps:

[0006] A positioning step of inserting and assembling the adapter piece tooling with the main body structure of the adapter piece;

[0007] A connecting step of leading the tab part from one end of the electrode assembly in the length direction and connecting the tab part with the wing structure;

[0008] A bending step of bending the wing structure and the tab part.

[0009] Optionally, in the positioning step, a through groove is formed on the main body structure, and the adapter piece tooling is inserted and assembled with the through groove. The adapter piece tooling and the through groove on the main body structure are reliably assembled by the insertion method, and the through groove formed on the main body structure also has a weight reduction effect to a certain extent.

[0010] Optionally, in the positioning step, the adapter piece tooling comprises an insertion part and a supporting part which are connected vertically or substantially vertically, the insertion part is inserted into the through groove, and one side of the supporting part is at least partially attached to the side surface of the main body structure close to the electrode assembly. The insertion part and the supporting part are connected vertically or substantially vertically in a T shape, the insertion part and the through groove are stably inserted and assembled, the supporting part abuts against the main body structure to ensure the supporting flatness of the main body structure.

[0011] Optionally, in the positioning step, the adapter piece tool is provided with two groups, and the two groups of adapter piece tools are connected through an adapter piece tool base plate. The two groups of adapter piece tools are positioned at the two ends of the adapter piece tool base plate in the length direction, and the main body structure of the adapter piece at the two ends of the electrode assembly in the length direction can be positioned at the same time, thereby improving the work efficiency.

[0012] Optionally, in the connecting step, the electrode assembly is provided with two groups, and the tab part of one group of the electrode assembly is led away in a direction away from the other group of the electrode assembly, and the tab parts of the two groups of the electrode assembly are connected with the wing structures at the two ends in the width direction of the main body structure, respectively. Two tab parts at the same end of the two groups of electrode assemblies are connected and output through one adapter piece, thereby reducing the number of adapter pieces, improving the energy density of the electrode assembly, and reducing the production cost.

[0013] Optionally, in the connecting step, one end of the adapter piece is provided with a leading-out structure connected with the cover plate assembly. The leading-out structure of the adapter piece is connected with the cover plate assembly, and the current is uniformly output to the cover plate assembly through the leading-out structure.

[0014] Optionally, in the bending step, the wing structure and the tab part are bent towards the side of the main body structure away from the electrode assembly, so that part of the tab part faces the side of the main body structure away from the electrode assembly.

[0015] Optionally, in the bending step, after the wing structure and the tab part are bent, the adapter piece tool is removed, a redundant space is formed between the side of the main body structure close to the electrode assembly and the extension part of the tab part in the thickness direction of the electrode assembly, and the distance between the side of the main body structure close to the electrode assembly and the extension part of one group of the tab part gradually decreases from one side of the electrode assembly to the other side of one group of the electrode assembly in the thickness direction of the electrode assembly. The redundant space can effectively prevent the main body structure from being damaged when it expands, and the tab part will not be damaged when it is shaken and impacted.

[0016] Optionally, the tab part includes a plurality of single-piece tabs, and before the connecting step, the plurality of single-piece tabs are subjected to tab pretreatment, so that the plurality of single-piece tabs are integrated to form the tab part.

[0017] Optionally, the tab pretreatment includes ultrasonic pre-welding or hot pressing of the plurality of single-piece tabs, and then the plurality of single-piece tabs are cut in length to form the tab part.

[0018] The beneficial effects of the present application are as follows:

[0019] The adapter piece tooling and the main body structure of the adapter piece are inserted and assembled in the battery assembly method of the application, the assembly is reliable and stable, when the wing structure of the adapter piece is bent, the adapter piece tooling can stably support the main body structure of the adapter piece, and reliable bending of the wing structure is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the structure front view of the adapter piece described in the embodiment of the application;

[0021] Figure 2 is the structure side view of the adapter piece described in the embodiment of the application;

[0022] Figure 3 is the structure top view of the adapter piece described in the embodiment of the application;

[0023] Figure 4 is the structure front view of the adapter piece tooling described in the embodiment of the application;

[0024] Figure 5 is Figure 4 is the sectional view along the A-A direction;

[0025] Figure 6 is the assembly schematic view of the adapter piece tooling and the adapter piece described in the embodiment of the application;

[0026] Figure 7 is the assembly schematic view of the adapter piece and the cover plate assembly described in the embodiment of the application;

[0027] Figure 8 is the assembly schematic view of the adapter piece, the cover plate assembly, the electrode assembly and the adapter piece tooling assembly described in the embodiment of the application;

[0028] Figure 9 is Figure 8 is the sectional view along the B-B direction in the figure;

[0029] Figure 10 is Figure 9 is the local enlarged schematic view at A in the figure;

[0030] Figure 11 is the assembly sectional view of the adapter piece, the electrode assembly and the adapter piece tooling assembly in the bending step;

[0031] Figure 12 is Figure 11 is the local enlarged schematic view at B in the figure.

[0032] in the figure:

[0033] 1, adapter piece; 11, main body structure; 12, wing structure; 13, through groove; 14, lead-out structure;

[0034] 100, electrode assembly; 101, tab portion;

[0035] 200, adapter jig; 201, insertion portion; 202, support portion; 203, adapter jig base plate;

[0036] 300, cover plate assembly. DETAILED DESCRIPTION

[0037] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like component have the same or similar designations throughout the drawing figures. The embodiments described below are exemplary in nature, and are intended to be illustrative of the present application rather than to limit the same.

[0038] In the description of the present application, unless specifically defined otherwise and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixed connection, but also can be detachable connection, can be mechanical connection, but also can be electrical connection, can be directly connected, but also through the intermediate medium indirectly connected, can be two elements inside the communication or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In the description of the present application, unless specifically defined otherwise and limited, the first feature is "on" or "under" the second feature can include the first feature and the second feature directly contact, but also can include the first feature and the second feature is not directly contact but through the contact between them and other features. Moreover, the first feature is "on", "above" and "above" the second feature includes the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0040] In the description of the present embodiment, the terms "up", "down", "right", and other orientation or position relationship are based on the orientation or position relationship shown in the drawing, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0041] The technical solutions of the present application are further illustrated below by specific embodiments in conjunction with the drawings.

[0042] The present application provides a battery assembly method, comprising the following steps:

[0043] The positioning step involves inserting and assembling the adapter piece tooling 200 with the main structure 11 of the adapter piece 1.

[0044] In this step, the specific structure of the adapter piece 1 in this embodiment is as follows: Figures 1-3 As shown, a through groove 13 is provided on the main structure 11, and the through groove 13 is arranged along the length direction of the main structure 11. The specific structure of the adapter piece tooling 200 is as follows. Figures 4-6 As shown, the adapter tooling 200 includes an insertion part 201 and a support part 202 connected vertically or substantially vertically. The insertion part 201 and the support part 202 are vertically connected in a T-shape. The insertion part 201 is inserted into the through groove 13, achieving a stable insertion fit with the through groove 13. One side of the support part 202 is at least partially attached to the surface of the main structure 11 near the electrode assembly 100, abutting against and supporting the main structure 11 to ensure the support flatness of the main structure 11. In this embodiment, by opening the through groove 13 on the main structure 11, a stable insertion fit is achieved between the main structure 11 of the adapter 1 and the adapter tooling 200. Furthermore, the through groove 13 can also reduce weight and cost, lowering the manufacturing cost of the adapter 1.

[0045] In the above positioning steps, two sets of adapter piece fixtures 200 are provided, and the two sets of adapter piece fixtures 200 are connected by an adapter piece fixture base plate 203. For example... Figure 6 As shown, the two sets of adapter plate fixtures 200 are located at both ends of the adapter plate fixture base plate 203 along the length direction, which can simultaneously position the main structure 11 of the adapter plates at both ends of the electrode assembly 100 along the length direction, thereby improving work efficiency.

[0046] In the connection step, the tab 101 is led out from one end of the electrode assembly 100 along its length and connected to the wing structure 12.

[0047] In this step, such as Figures 8-10 As shown in this embodiment, Figure 10 The horizontal arrow indicates the length direction of the electrode assembly 100, and the vertical arrow indicates the thickness direction of the electrode assembly 100. The width direction of the main structure 11 is in the same direction as the thickness direction of the electrode assembly 100. The tab 101 extends from one end of the electrode assembly 100 along its length and is connected to the wing structure 12 of the adapter piece 1 by welding.

[0048] Specifically, in the above connection steps, the electrode assembly 100 is provided in two sets. The tabs 101 of one set of electrode assemblies 100 extend outwards from the other set of electrode assemblies 100. The tabs 101 of the two sets of electrode assemblies 100 are respectively connected to the wing structures 12 at both ends of the main body structure 11 in the width direction. (Refer to the attached diagram.) Figure 10In the embodiment, the electrode assembly 100 is provided with two groups, the tab parts 101 of the two groups of electrode assemblies 100 in the length direction correspond to the wing structures 12 on the two sides of the body structure 11 in the width direction, and are connected correspondingly, the two tab parts 101 at the same end of the two groups of electrode assemblies 100 are connected and output through one adapter piece 1, the number of the adapter pieces 1 is reduced, the energy density of the electrode assembly 100 is improved, and the production cost is reduced.

[0049] Optionally, in the connecting step, one end of the adapter piece 1 is provided with a leading-out structure 14, and the leading-out structure 14 is connected with the cover plate assembly 300. Figure 7 As shown in the drawings, the adapter piece 1 is connected with the cover plate assembly 300. Figure 3 In the embodiment, the adapter piece 1 is provided with the leading-out structure 14 for connecting with the cover plate assembly 300, the current collected by the adapter piece 1 is uniformly transported to the pole column of the cover plate assembly 300 through the leading-out structure 14, and one end of the cover plate assembly 300 in the length direction is connected with one adapter piece 1, in the connecting step, the leading-out structure 14 of the adapter piece 1 can be connected with the cover plate assembly 300 first, so that the cover plate assembly 300 can further support the adapter piece 1 in the subsequent bending process of the wing structure 12, and the stable bending of the subsequent wing structure 12 is ensured.

[0050] In the bending step, the wing structure 12 and the tab part 101 are bent.

[0051] In this step, as shown in the drawings, Figure 11 and Figure 12 As shown in the drawings, Figure 12 The horizontal direction indicated by the arrow is the length direction of the electrode assembly 100, and the vertical direction indicated by the arrow is the thickness direction of the electrode assembly 100. After the tab part 101 is connected with the wing structure 12, the tab part 101 and the wing structure 12 are bent together towards the side of the body structure 11 away from the electrode assembly 100, so that part of the tab part 101 faces the side of the body structure 11 away from the electrode assembly 100.

[0052] Optionally, in the bending step, after the wing structure 12 and the tab part 101 are bent, the adapter piece tooling 200 is removed, a redundant space is formed between the side of the body structure 11 close to the electrode assembly 100 and the extension part of the tab part 101 in the thickness direction of the electrode assembly 100, and the distance between the side of the body structure 11 close to the electrode assembly 100 and the extension part of the tab part 101 in the thickness direction of the electrode assembly 100 gradually decreases from one side of the electrode assembly 100 to the other side of the electrode assembly 100. Figure 12As shown, after the wing structure 12 and the tab portion 101 are bent, the adapter piece tool 200 is removed, and the main body structure 11 is close to the electrode assembly 100, and the tab portion 101 forms a redundant space along the extension of the electrode assembly 100 in the thickness direction. The redundant space can effectively ensure that the main body structure 11 will not be damaged when the tab portion 101 is expanded, and the tab portion 101 will not be damaged when it is shaken and impacted.

[0053] Optionally, the tab portion 101 includes a plurality of single-layer tabs, and before the connecting step, the plurality of single-layer tabs are subjected to tab pretreatment to integrate the plurality of single-layer tabs to form the tab portion 101. It can be understood that the tab portion 101 is integrated from the plurality of single-layer tabs, and before the tab portion 101 is bent, the plurality of single-layer tabs are subjected to tab pretreatment. The tab pretreatment includes ultrasonic pre-welding or hot pressing of the plurality of single-layer tabs, and then the length of the plurality of single-layer tabs after the treatment is cut to form the tab portion 101 with a suitable length.

[0054] Obviously, the above embodiments of the present application are only examples for clear illustration of the present application, and are not intended to limit the embodiments of the present application. Based on the above description, other different forms of changes or variations can be made by those of ordinary skill in the art. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A method of assembling a battery, characterized by, The method comprises the following steps: a positioning step of inserting and assembling a adapter piece tool (200) with a main body structure (11) of an adapter piece (1); a connecting step of leading out tab portions (101) of an electrode assembly (100) from one end of the electrode assembly (100) in the length direction and connecting the tab portions (101) with wing structures (12) of the adapter piece (1); a bending step of bending the wing structures (12) and the tab portions (101); in the positioning step, a through groove (13) is formed in the main body structure (11), and the adapter piece tool (200) is inserted and assembled with the through groove (13); in the positioning step, the adapter piece tool (200) comprises a vertical connection of an insertion part (201) and a support part (202), the insertion part (201) is inserted in the through groove (13), and one side of the support part (202) is at least partially attached to a side surface of the main body structure (11) close to the electrode assembly (100).

2. The battery assembling method according to claim 1, wherein in the positioning step, two sets of the adapter piece tool (200) are provided, and the two sets of the adapter piece tool (200) are connected through an adapter piece tool bottom plate (203).

3. The battery assembly method of claim 1, wherein, in the connecting step, two sets of the electrode assembly (100) are provided, the tab portions (101) of one set of the electrode assembly (100) are led out in a direction away from the other set of the electrode assembly (100), and the tab portions (101) of the two sets of the electrode assembly (100) are respectively connected with the wing structures (12) at both ends of the main body structure (11) in the width direction.

4. The battery assembly method of claim 1, wherein, in the connecting step, one end of the adapter piece (1) is provided with a leading-out structure (14), and the leading-out structure (14) is connected with a cover plate assembly (300).

5. The battery assembly method of claim 1, wherein, in the bending step, the wing structures (12) and the tab portions (101) are bent towards a side of the main body structure (11) away from the electrode assembly (100), so that a part of the tab portions (101) faces the side of the main body structure (11) away from the electrode assembly (100).

6. The battery assembly method of claim 1, wherein, in the bending step, after the wing structures (12) and the tab portions (101) are bent, the adapter piece tool (200) is removed, a redundant space is formed between a side of the main body structure (11) close to the electrode assembly (100) and an extension of the tab portions (101) in the thickness direction of the electrode assembly (100), and the distance between the side of the main body structure (11) close to the electrode assembly (100) and the extension of one set of the tab portions (101) gradually decreases from one side of the electrode assembly (100) to the other side of one set of the electrode assembly (100) in the thickness direction of the electrode assembly (100).

7. The battery assembly method of claim 1, wherein, The tab portions (101) comprise a plurality of single tab layers, and before the connecting step, a tab pre-treatment is performed on the plurality of single tab layers to integrate the plurality of single tab layers to form the tab portions (101).

8. The battery assembly method of claim 7, wherein, The tab pre-treatment includes ultrasonic pre-welding or hot pressing on the multi-layer single-piece tab, and cutting the length of the multi-layer single-piece tab to form the tab portion (101).

Images