Tab welding clamp

Abstract

The utility model provides a pole lug welding clamp which comprises a clamp assembly and a height assembly, a bearing structure is arranged on the top face of the clamp assembly, and a first connecting structure is arranged on the bottom face of the clamp assembly. The height assembly comprises a plurality of height modules which are detachably connected, the top face of each height module is provided with a second connecting structure, and the bottom face of each height module is provided with a first connecting structure. The clamp assembly and the height modules are stacked in sequence, the first connecting structure of the clamp assembly is detachably connected with the second connecting structure of one height module, and the adjacent height modules are detachably connected through the first connecting structures and the second connecting structures. A plurality of height modules can be stacked in the vertical direction, so that the height of the height assembly is adjusted, the height assembly is matched with the welding heights of different battery cell tabs, the welding heights of the different battery cell tabs can be changed without replacing a specific clamp, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of battery tab welding, in particular to a tab welding fixture. Background Art

[0002] During the battery manufacturing process, one of the steps is to weld the battery tabs to the poles on the aluminum busbar. The welding must not only ensure a reliable connection between the tabs and the aluminum busbar, but also require the weld to be smooth and beautiful.

[0003] During the laser welding process, the height of the battery tab and the aluminum bar is closely related to the focal length of the laser beam. If the height of the battery tab and the aluminum bar is too high or too low, the welding effect will be affected. If the height is too high, the distance between the welding surface of the battery tab and the aluminum bar and the laser beam focus will be too far, which will increase the energy loss during welding, the welding temperature will be insufficient, and the welded joint will be more prone to quality problems such as holes and cracks, affecting the welding effect and strength. When the height of the battery tab and the aluminum bar is too low during welding, the laser beam focus will be too close to the welding surface, which may cause the welding surface to overheat, and even cause problems such as sputtering and pores, affecting the quality and stability of the welded joint. At the same time, too low a height will also increase the friction between the laser welding head and the welding material, which may cause uneven melting of the welding head and affect the welding quality. Under normal circumstances, the height of the tab and the aluminum bar at the battery cell is the optimal height for welding, so when welding the tab and the aluminum bar, it is necessary to adapt the height of the battery tab and the aluminum bar according to the height of the tab and the aluminum bar of different battery cells.

[0004] However, in the prior art, when welding the tabs and aluminum bars for cells of different heights, different clamps matching the height of the cell model are often required to support the tabs and aluminum bars, so as to complete the welding of the tabs and aluminum bars. Since the height of each clamp is fixed, each time the tabs and aluminum bars of a cell model are welded, a clamp of a model matching the height needs to be replaced. If the tabs and aluminum bars of a cell with another height need to be welded, a clamp of the corresponding height needs to be equipped, which increases the cost. Utility Model Content

[0005] In view of the shortcomings of the prior art, a tab welding fixture is provided, the height of which can be changed through assembly to adapt to the heights of different battery tabs and aluminum bars.

[0006] To achieve the above-mentioned purpose, the utility model provides a tab welding fixture, including a fixture assembly and a height assembly, the top surface of the fixture assembly is provided with a receiving structure, and the bottom surface is provided with a first connecting structure; the height assembly includes a plurality of detachably connected height modules, the top surface of each height module is provided with a second connecting structure, and the bottom surface of each height module is provided with a first connecting structure; the fixture assembly and the plurality of height modules are stacked in sequence, the first connecting structure of the fixture assembly is detachably connected to the second connecting structure of one of the height modules, and adjacent height modules are detachably connected via the first connecting structure and the second connecting structure.

[0007] According to an embodiment of the present invention, the first connection mechanism is a limiting groove, the second connection structure is a limiting protrusion adapted to the limiting groove, and the limiting groove of each height module is matched and connected with the limiting protrusion of the adjacent height module.

[0008] According to an embodiment of the present utility model, the first connection mechanism is a limiting protrusion, the second connection structure is a limiting groove adapted to the limiting protrusion, and the limiting groove of each height module is matched and connected with the limiting protrusion of the adjacent height module.

[0009] According to an embodiment of the present utility model, the depth of the limiting groove is greater than or equal to the height of the limiting protrusion.

[0010] According to an embodiment of the present utility model, four edges of the limiting protrusion are provided with rounded corners, and the inner edge of the limiting groove is also provided with inner rounded corners.

[0011] According to an embodiment of the present utility model, a first limiting groove and two second limiting grooves are formed on the receiving structure.

[0012] According to an embodiment of the present utility model, the depth of the first limiting groove is greater than the depth of each second limiting groove, and each second limiting groove is connected to the first limiting groove.

[0013] According to an embodiment of the present invention, the groove wall of the first limiting groove is provided with at least one first opening, the at least one first opening penetrates the side wall of the first limiting groove, and the opening direction faces upward.

[0014] According to an embodiment of the present invention, the groove wall of each second limiting groove is provided with at least one second opening, the at least one second opening penetrates the side wall of the second limiting groove, and the opening direction faces upward.

[0015] To summarize, the utility model realizes the stacking of multiple height modules in the vertical direction by interlocking the first connecting structure on the top surface of the height module with the second connecting structure on the bottom surface of the adjacent height module, and interlocking the first connecting structure on the bottom surface of the clamp assembly with the second connecting structure on the top surface of the topmost height module among the multiple height modules after stacking, so as to adjust the height of the height assembly to match the welding height of different battery cell pole ears. The welding height of different battery cell pole ears can be changed without replacing a specific clamp, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 is a three-dimensional diagram of a tab welding fixture in an embodiment;

[0018] Figure 2 A schematic diagram of a tab welding fixture for marking a battery cell model in an embodiment;

[0019] Figure 3 is an exploded view of the tab welding fixture in the embodiment;

[0020] Figure 4 Another perspective of the exploded view of the tab welding fixture in the embodiment.

[0021] Description of Reference Numerals

[0022] 01-ear; 02-aluminum bar;

[0023] 1-Clamp assembly;

[0024] 2-height component; 21-height module; 201-limiting groove; 202-limiting protrusion; 211-first submodule; 212-second submodule; 213-third submodule; 214-fourth submodule; 215 fifth submodule;

[0025] 3-supporting structure; 31-first limiting groove; 301-first opening; 32-second limiting groove; 302-second opening; 4-first connecting structure; 5-second connecting structure. DETAILED DESCRIPTION

[0026] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0027] In addition, in the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0028] During the production process of the battery, the pole tab 01 and the aluminum bar 02 need to be welded. To achieve better welding effect, the welding height of the pole tab 01 and the aluminum bar 02 needs to be the height of the battery cell of this model. Therefore, this embodiment provides a pole tab welding fixture with adjustable height so that the welding height of the pole tab 01 and the aluminum bar 02 reaches the required matching model of battery cell height.

[0029] See also Figure 1 , Figure 3 and Figure 4 The present embodiment provides a tab welding fixture, including a fixture assembly 1 and a height assembly 2. A receiving structure 3 is provided on the top surface of the fixture assembly 1, and the receiving structure 3 is used to receive the tab 01 and the aluminum bar 02, and the tab 01 and the aluminum bar 02 are placed in the receiving structure 3. A first connecting structure 4 is provided on the bottom surface of the fixture assembly 1. The height assembly 2 includes a plurality of detachably connected height modules 21, and the height of each height module 21 is not uniform, which is determined according to actual needs. A second connecting structure 5 is provided on the top surface of each height module 21, and a first connecting structure 4 is provided on the bottom surface of each height module 21. The fixture assembly 1 and the plurality of height modules 21 are stacked in sequence, and the first connecting structure 4 of the fixture assembly 1 is detachably connected to the second connecting structure 5 of one of the height modules 21, and adjacent height modules 21 are detachably connected through the first connecting structure 4 and the second connecting structure 5.

[0030] During specific use, the height of the height module 21 can be designed according to the common battery models with different heights on the market, so that multiple height modules 21 with different heights that can correspond one-to-one to different battery models can be obtained, so that the height of one or more height modules 21 can match the height of a corresponding battery model. In this way, different height modules 21 can be selected to weld the common battery models with different heights on the market separately.

[0031] The following example will illustrate the use of the tab welding fixture in the process of welding the tab to the aluminum bar. Figure 2 , the corresponding battery cell model is marked on each height module 21. In this embodiment, the height can be adjusted to meet the battery cell heights of model A, model B and model C respectively. When it is necessary to switch a certain battery cell model, the height modules 21 with the battery cell model mark are stacked together and used, and can be accurately adjusted to a specific height.

[0032] In this example, the clamp assembly 1 is marked with A, B and C, indicating that the clamp assembly 1 can be used for welding the pole tab 01 and the aluminum bus 02 in the model A battery cell, for welding the pole tab 01 and the aluminum bus 02 in the model B battery cell, and for welding the pole tab 01 and the aluminum bus 02 on the model C battery cell.

[0033] The height module 21 specifically includes a first submodule 211, a second submodule 212, a third submodule 213, a fourth submodule 214, and a fifth submodule 215. The first submodule 211 is marked with A and C, indicating that the first submodule 211 can be used for welding the tab 01 and the aluminum bar 02 in the model A battery cell, and can also be used for welding the tab 01 and the aluminum bar 02 in the model C battery cell. The second submodule 212 is marked with A and B, indicating that the second submodule 212 can be used for welding the tab 01 and the aluminum bar 02 in the model A battery cell, and can also be used for welding the tab 01 and the aluminum bar 02 in the model B battery cell. The third submodule 213 is marked with A, B, and C, indicating that the third submodule 213 can be used for welding the tab 01 and the aluminum bar 02 in the model A battery cell, and can also be used for welding the tab 01 and the aluminum bar 02 in the model B battery cell, and can also be used for welding the tab 01 and the aluminum bar 02 in the model C battery cell. The fourth submodule 213 is marked with A, B and C, indicating that the fourth submodule 213 can be used for welding the tab 01 and the aluminum bar 02 in the model A battery cell, the tab 01 and the aluminum bar 02 in the model B battery cell, and the tab 01 and the aluminum bar 02 in the model C battery cell. The fifth submodule 213 is marked with A, B and C, indicating that the fifth submodule 213 can be used for welding the tab 01 and the aluminum bar 02 in the model A battery cell, the tab 01 and the aluminum bar 02 in the model B battery cell, and the tab 01 and the aluminum bar 02 in the model C battery cell.

[0034] When it is necessary to weld the pole ear 01 of the battery cell A, the clamp assembly 1 marked with A, the first submodule 211, the second submodule 212, the third submodule 213, the fourth submodule 214 and the fifth submodule 215 are stacked to achieve the required height for welding the pole ear 01 and the aluminum bus 02 in the battery cell A, thereby better welding the pole ear 01 and the aluminum bus 02 in the battery cell A.

[0035] When it is necessary to weld the pole ear 01 of the battery cell B, the clamp assembly 1 marked with B, the second submodule 212, the third submodule 213, the fourth submodule 214 and the fifth submodule 215 are stacked to achieve the required height for welding the pole ear 01 and the aluminum bus 02 in the battery cell B, thereby better welding the pole ear 01 and the aluminum bus 02 in the battery cell B.

[0036] When it is necessary to weld the pole ear 01 of the battery cell C, the clamp assembly 1 marked with C, the first submodule 211, the third submodule 213, the fourth submodule 214 and the fifth submodule 215 are stacked to achieve the required height for welding the pole ear 01 and the aluminum bus 02 in the battery cell C, thereby better welding the pole ear 01 and the aluminum bus 02 in the battery cell C.

[0037] When welding the pole tab 01, the corresponding height module 21 is selected according to different battery cell models, and the adjacent height modules 21 are connected by the first connection structure 4 and the second connection structure 5 to form a height component 2. The first connection structure 4 on the bottom surface of the fixture component 1 is connected to the second connection structure 5 on the top surface of the height component 2 to form a welding fixture of the required battery cell height. When the pole tab 01 needs to match the height of other types of battery cells, it is only necessary to increase or decrease the corresponding height module 21. Therefore, only one set of pole tab welding fixtures is required to match the different height requirements of the pole tab 01 welding, which greatly simplifies the operation process when switching different battery cell models and improves the convenience and efficiency of operation. Operators can quickly switch to the height requirements of the model battery cell, saving time and improving production efficiency.

[0038] Furthermore, the first connection mechanism 4 is a limiting groove 201 , the second connection structure 5 is a limiting protrusion 202 adapted to the limiting groove 201 , and the limiting groove 201 of each height module 21 is matched and connected with the limiting protrusion 202 of the adjacent height module 21 .

[0039] In another embodiment, the first connection structure 4 is a limiting protrusion 202, and the second connection structure 5 is a limiting groove 201 adapted to the limiting protrusion 202. The limiting groove 201 of each height module 21 is matched with the limiting protrusion 202 of the adjacent height module 21. The positions of the limiting groove 201 and the limiting protrusion 202 correspond vertically and are consistent in size. Each height module 21 is designed with a limiting groove 201, which can effectively prevent the height module 21 from accidentally moving in the horizontal direction. The limiting groove 201 on each height module 21 is designed to be precisely processed to ensure that the matching between each height module 21 is accurate, and the height position after adjustment is stable and reliable, so as to improve the stability of welding quality.

[0040] See also Figure 3 and Figure 4 The depth of the limiting groove 201 is greater than or equal to the height of the limiting protrusion 202. According to this arrangement, the side surface of the height module 21 forms a complete plane after splicing, thereby reducing the gap of the splicing.

[0041] See also Figure 3 and Figure 4 The four edges of the limiting protrusion 202 are rounded, and the inner edges of the limiting groove 201 are also rounded. In this way, the right angle is removed, making it easier to assemble the limiting protrusion 2 and the limiting groove 201, and more convenient to assemble the height modules 21.

[0042] See also Figure 1 and Figure 3 The receiving structure 3 is provided with a first limiting groove 31 and two second limiting grooves 32. The first limiting groove 31 is used to place the aluminum bar 02, to limit the aluminum bar 02, to ensure that the aluminum bar 02 can be firmly placed in an appropriate position, and to ensure the accuracy of the welding process. The second limiting groove 32 is used to place the pole ear 01, to limit the pole ear 01, to ensure that the pole ear 01 can be firmly placed in an appropriate position, and to ensure the accuracy of the welding process.

[0043] Further, the depth of the first limiting groove 31 is greater than the depth of each second limiting groove 32, and each second limiting groove 32 is connected to the first limiting groove 31. In this embodiment, the depths of the first limiting groove 31 and the second limiting groove 32 are slightly different according to the thickness of the aluminum bar 02 and the pole lug 01. The aluminum bar 02 is placed in the first limiting groove 31, and the depth of the first limiting groove 31 is greater than the thickness of the aluminum bar 02, so that after the aluminum bar 02 is placed in the first limiting groove 31, the height of the upper plane of the aluminum bar 02 is level with the bottom of the second limiting groove 32. In this way, the aluminum bar 02 and the second limiting groove 32 jointly support the pole lug 01, which is more conducive to the welding of the pole lug 01 and ensures a smooth welding process.

[0044] Furthermore, the groove wall of the first limiting groove 31 is provided with at least one first opening 301. In this embodiment, four first openings 301 are provided, distributed on the side wall that is not connected to the second limiting groove 32. Each first opening 301 penetrates the side wall of the first limiting groove 31, and the opening direction is upward. This arrangement facilitates the taking of the aluminum bar 02.

[0045] Further, the groove wall of each second limiting groove 32 is provided with at least one second opening 302. In this embodiment, the groove wall of each second limiting groove 32 is provided with two second openings 302, which are distributed on the side wall that is not connected to the second limiting groove 32. Each second opening 301 passes through the side wall of the second limiting groove 32, and the opening direction is upward. This arrangement facilitates the removal of the tab 01.

[0046] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A tab welding fixture, characterized in that: The invention comprises a clamp assembly (1) and a height assembly (2), wherein the top surface of the clamp assembly (1) is provided with a receiving structure (3), and the bottom surface of the clamp assembly (1) is provided with a first connecting structure (4); the height assembly (2) comprises a plurality of height modules (21), the top surface of each height module (21) is provided with a second connecting structure (5), and the bottom surface of each height module (21) is provided with a first connecting structure (4); the clamp assembly (1) and the plurality of height modules (21) are stacked in sequence, the first connecting structure (4) of the clamp assembly (1) is detachably connected to the second connecting structure (5) of one of the height modules (21), and adjacent height modules (21) are detachably connected via the first connecting structure (4) and the second connecting structure (5).

2. The tab welding fixture according to claim 1, characterized in that: The first connection structure (4) is a limiting groove (201), the second connection structure (5) is a limiting protrusion (202) adapted to the limiting groove (201), and the limiting groove (201) of each height module (21) is matched and connected with the limiting protrusion (202) of the adjacent height module (21).

3. The tab welding fixture according to claim 1, characterized in that: The first connection structure (4) is a limiting protrusion (202), the second connection structure (5) is a limiting groove (201) adapted to the limiting protrusion (202), and the limiting groove (201) of each height module (21) is matched and connected with the limiting protrusion (202) of the adjacent height module (21).

4. The tab welding fixture according to claim 2 or 3, characterized in that: The depth of the limiting groove (201) is greater than or equal to the height of the limiting protrusion (202).

5. The tab welding fixture according to claim 2 or 3, characterized in that: The four edges of the limiting protrusion (202) are provided with rounded corners, and the inner edge of the limiting groove (201) is also provided with inner rounded corners.

6. The tab welding fixture according to claim 1, characterized in that: The receiving structure (3) is provided with a first limiting groove (31) and two second limiting grooves (32).

7. The tab welding fixture according to claim 6, characterized in that: The depth of the first limiting groove (31) is greater than the depth of each second limiting groove (32), and each second limiting groove (32) is connected to the first limiting groove (31).

8. The tab welding fixture according to claim 6, characterized in that: The groove wall of the first limiting groove (31) is provided with at least one first opening (301), and the at least one first opening (301) passes through the side wall of the first limiting groove (31), and the opening direction faces upward.

9. The tab welding fixture according to claim 6, characterized in that: The groove wall of each second limiting groove (32) is provided with at least one second opening (302), and the at least one second opening (302) passes through the side wall of the second limiting groove (32), and the opening direction faces upward.

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