Welding jig for battery cell module

Abstract

The utility model discloses a kind of welding jigs of battery module, it is related to battery production technical field, wherein, welding jig includes shell and limit plate, shell is enclosed and has the limit space with opening in top, limit space is used to accommodate battery module, shell is uniformly provided with first connecting lug along the relative two sides of longitudinal direction;Limit plate cover is set in opening, and limit plate is provided with two second connecting lug along the relative two sides of longitudinal direction, two second connecting lug extends out opening, and two second connecting lug and two first connecting lug are set one by one, each first connecting lug and corresponding second connecting lug are connected by an elastic member;Multiple welding holes capable of placing aluminum row are opened on limit plate, each welding hole is used to be arranged two pole lug on different two battery and adjacent, to make two pole lug can be welded with corresponding aluminum row.The welding jig can ensure that battery is kept stable when pole lug and aluminum row are welded and does not shake, improve welding quality.

Description

Technical Field

[0001] This utility model relates to the field of battery production technology, and in particular to a welding fixture for battery cell modules. Background Technology

[0002] In the production process of battery cell modules, the tabs on the battery cells need to be welded to the aluminum busbars. During welding, the tabs and aluminum busbars need to be fixed in order to improve the welding quality. Currently, the welding fixture commonly used in welding uses a limiting plate to fix multiple battery cells. In use, multiple battery cells are first arranged neatly, and then the limiting plate is placed on the multiple battery cells. The limiting plate has holes for the tabs to be exposed, thereby keeping multiple battery cells stable. However, a single limiting plate cannot provide sufficient clamping force, and manual pressing is required. Due to the influence of manual operation, the battery cells are prone to shaking during the welding process, resulting in poor welding quality. Utility Model Content

[0003] The main purpose of this utility model is to propose a welding fixture for battery cell modules, which aims to solve the technical problem of poor welding quality of battery cells.

[0004] To achieve the above objectives, this utility model proposes a welding fixture for a battery cell module. The battery cell module includes multiple battery cells arranged in a horizontal and vertical array, each battery cell being arranged horizontally and having two tabs on its top. The welding fixture includes:

[0005] The housing forms a limiting space with an opening at the top, the limiting space being used to accommodate the battery cell module, and the housing has first connecting ears on opposite sides along the longitudinal direction;

[0006] A limiting plate is provided at the opening, and two second connecting ears are provided on opposite sides along the longitudinal direction of the limiting plate. The two second connecting ears extend out of the opening, and the two second connecting ears correspond one-to-one with the two first connecting ears. Each first connecting ear and its corresponding second connecting ear are connected by an elastic element. The limiting plate has a plurality of welding holes for placing aluminum busbars. Each welding hole is used for two adjacent electrodes on two different battery cells to extend into, so that the two electrodes can be welded to the corresponding aluminum busbars to connect the multiple battery cells of the battery cell module in series.

[0007] In one embodiment, both the first connecting ear and the second connecting ear are provided with connecting holes, and the elastic element is an elastic band, which is wrapped around the two corresponding connecting holes.

[0008] In one embodiment, the two tabs on the top of each of the battery cells are distributed laterally at intervals; some of the welding holes are first welding holes, each of the first welding holes is arranged laterally, and the first welding holes are used to allow two tabs that are distributed laterally adjacent to each other to extend into; the other part of the welding holes are second welding holes, each of the second welding holes is arranged longitudinally, and the second welding holes are used to allow two tabs that are distributed longitudinally adjacent to each other to extend into.

[0009] In one embodiment, the two electrodes extending into the first welding hole abut against the two opposite holes along the transverse direction of the first welding hole, and the two electrodes extending into the second welding hole abut against the two opposite holes along the longitudinal direction of the second welding hole.

[0010] In one embodiment, the limiting plate is further provided with through holes corresponding to the positions of the explosion-proof valves of each of the battery cells.

[0011] In one embodiment, the housing includes a base plate and a surrounding plate disposed on top of the base plate, the base plate and the surrounding plate together forming the limiting space, and two first connecting ears protruding outward from opposite sides of the base plate.

[0012] In one embodiment, a positioning plate is further provided at the bottom of the limiting plate. The positioning plate has positioning holes for each of the two tabs of each battery cell. Each tab passes through the corresponding positioning hole and abuts against the hole wall of the positioning hole.

[0013] In one embodiment, the inner circumferential side of the top of the enclosure is recessed downward to form an annular step, and the positioning plate is supported on the annular step.

[0014] In one embodiment, the top edge of the opening on the enclosure forms a limiting edge, and the limiting plate is supported on the limiting edge so that the limiting plate is located outside the limiting space.

[0015] In one embodiment, a plurality of limiting areas are formed within the limiting space, each limiting area is used to place one of the battery cells, and a partition is provided between any two adjacent limiting areas.

[0016] This utility model discloses a welding fixture for a battery cell module, comprising a housing and a limiting plate. The housing forms a limiting space, within which multiple battery cells can be arranged sequentially in the longitudinal and transverse directions for initial positioning. The limiting plate covers the opening and has welding holes, allowing tabs to extend into them. Additionally, aluminum busbars can be placed within the welding holes for positioning, facilitating subsequent welding operations. Furthermore, a first connecting ear and a second connecting ear are respectively provided on the housing and the limiting plate. An elastic element connects the first and second connecting ears, maintaining relative stability between the limiting plate and the housing. The elastic force of the elastic element clamps the battery cells between the housing and the limiting plate, ensuring stability and preventing movement during welding of the tabs and aluminum busbars, thereby improving welding quality. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a welding fixture provided in an embodiment of the present invention;

[0019] Figure 2 An exploded view of a welding fixture provided in an embodiment of this utility model.

[0020] Explanation of icon numbers:

[0021] 100. Welding fixture; 1. Housing; 11. Limiting space; 111. Limiting area; 12. Base plate; 13. Enclosure plate; 131. Annular step; 14. First connecting ear; 15. Elastic element; 16. Partition plate; 2. Limiting plate; 21. Welding hole; 21a. First welding hole; 21b. Second welding hole; 22. Second connecting ear; 221. Connecting hole; 23. Through hole; 3. Positioning plate; 31. Positioning hole; 200. Battery cell module; 201. Battery cell; 202. Electrode; 203. Explosion-proof valve; 204. Aluminum busbar.

[0022] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0024] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0025] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0026] This utility model proposes a welding fixture 100 for a battery cell module 200.

[0027] Please see Figures 1 to 2In one embodiment of this utility model, the welding fixture 100 of the battery cell module 200 includes a plurality of battery cells 201 arranged in a horizontal and vertical array. Each battery cell 201 is arranged in the horizontal direction and has two tabs 202 on its top. The welding fixture 100 includes a housing 1 and a limiting plate 2. The housing 1 forms a limiting space 11 with an opening at the top. The limiting space 11 is used to accommodate the battery cell module 200. The housing 1 has first connecting ears 14 on both opposite sides along the longitudinal direction. The limiting plate 2 covers the opening and is arranged on both opposite sides along the longitudinal direction. Two second connecting ears 22 are provided, extending out of the opening. The two second connecting ears 22 are corresponding to the two first connecting ears 14. Each first connecting ear 14 and the corresponding second connecting ear 22 are connected by an elastic element 15. The limiting plate 2 has multiple welding holes 21 for placing aluminum busbars 204. Each welding hole 21 is used for two adjacent pole ears 202 on two different battery cells 201 to extend into, so that the two pole ears 202 can be welded to the corresponding aluminum busbars 204, so that multiple battery cells 201 of the battery cell module 200 can be connected in series.

[0028] The welding fixture 100 for the battery cell module 200 of this utility model includes a housing 1 and a limiting plate 2. The housing 1 forms a limiting space 11, in which multiple battery cells 201 can be arranged sequentially in the longitudinal and transverse directions to initially limit the battery cells 201. The limiting plate 2 is placed over the opening and has welding holes 21. The electrode tabs 202 can extend into the welding holes 21. In addition, aluminum busbars 204 can also be placed in the welding holes 21 to limit the aluminum busbars 204. The positioning facilitates the next welding operation. In addition, a first connecting ear 14 and a second connecting ear 22 are respectively provided on the housing 1 and the limiting plate 2. The first connecting ear 14 and the second connecting ear 22 are connected by an elastic member 15, so that the limiting plate 2 and the housing 1 remain relatively stable. The elastic force of the elastic member 15 can make the housing 1 and the limiting plate 2 clamp the battery cell 201, so as to ensure that the battery cell 201 remains stable and does not shake when welding the electrode 202 and the aluminum busbar 204, thereby improving the welding quality.

[0029] Understandably, by welding the aluminum busbar 204 to the two tabs 202 on the two battery cells 201, the two battery cells 201 are connected in series. The wall of the welding hole 21 has a certain thickness, so the aluminum busbar 204 can be placed directly in the welding hole 21. The limiting effect of the welding hole 21 can prevent the aluminum busbar 204 from shifting during the welding process and improve the welding quality.

[0030] like Figure 1 As shown, the horizontal direction is left and right, the vertical direction is front and back, and the vertical direction is up and down.

[0031] In one embodiment, both the first connecting ear 14 and the second connecting ear 22 are provided with connecting holes 221, and the elastic element 15 is an elastic band that is wrapped around the corresponding two connecting holes 221.

[0032] In this embodiment, an elastic band is used as the elastic element 15, and a connection hole 221 is provided on the first connecting ear 14 and the second connecting ear 22. The elastic band is passed through the two connecting ears and wrapped around at least one turn to connect the limiting plate 2 and the housing 1. In addition, the elastic band has good elasticity and can provide different elastic tension by changing the number of turns, thereby ensuring greater stability between the limiting plate 2 and the housing 1. It can not only provide a suitable clamping force for the battery cell 201, but also make the operation simple and convenient.

[0033] In practical use, the two elastic elements 15 provide approximately the same elastic tension to ensure that the forces on both ends of the limiting plate 2 and the housing 1 are balanced, thereby accurately positioning and constraining the battery cell 201.

[0034] In one embodiment, the two tabs 202 on the top of each cell 201 are distributed laterally at intervals; part of the welding holes 21 are first welding holes 21a, each first welding hole 21a is arranged laterally, and the first welding holes 21a are used for two tabs 202 that are distributed laterally adjacent to each other to extend into; the other part of the welding holes 21 are second welding holes 21b, each second welding hole 21b is arranged longitudinally, and the second welding holes 21b are used for two tabs 202 that are distributed longitudinally adjacent to each other to extend into.

[0035] In this embodiment, by setting the first welding hole 21a and the second welding hole 21b in the horizontal and vertical directions, the welding requirements of the two tabs 202 on the two battery cells 201 in different directions can be met; by setting the first welding hole 21a and the second welding hole 21b in advance, a guiding function is provided to ensure that the position of each welding is accurate and to avoid short circuits caused by welding errors.

[0036] In one embodiment, the two tabs 202 extending into the first welding hole 21a abut against the two opposite holes of the first welding hole 21a in the transverse direction, and the two tabs 202 extending into the second welding hole 21b abut against the two opposite holes of the second welding hole 21b in the longitudinal direction.

[0037] In this real-time example, the tab 202 abuts against the wall of the corresponding welding hole 21, which can effectively limit the lateral or longitudinal displacement of the tab 202 during the welding process. Through the limiting effect of the hole wall on the tab 202, the contact area and welding angle between the tab 202 and the aluminum busbar 204 are kept consistent each time welding, which helps to form a uniform and stable weld, thereby significantly improving the consistency of welding quality and reducing the defect rate.

[0038] In one embodiment, the limiting plate 2 is further provided with through holes 23 corresponding to the positions of the explosion-proof valves 203 of each battery cell 201. By providing through holes 23 to expose the explosion-proof valves 203, the limiting plate 2 is prevented from directly pressing on the explosion-proof valves 203, which could cause damage or failure to the explosion-proof valves 203, thus ensuring the integrity and safety of the battery cells 201.

[0039] In one embodiment, the housing 1 includes a base plate 12 and a surrounding plate 13 disposed on the top of the base plate 12. The base plate 12 and the surrounding plate 13 together form a limiting space 11. Two first connecting ears 14 protrude outward from opposite sides of the base plate 12. The housing 1 is composed of the base plate 12 and the surrounding plate 13, which has a simple structure and is easy to assemble. The first connecting ears 14 are formed by protruding outward from the base plate 12, which has good structural stability. The first connecting ears 14 and the second connecting ears 22 are connected by elastic members 15, which can fix the base plate 12 and the limiting plate 2 to both sides of the surrounding plate 13. By replacing the surrounding plate 13 of different sizes, different sizes and quantities of battery cells 201 can be adapted.

[0040] In one embodiment, a positioning plate 3 is also provided at the bottom of the limiting plate 2. The positioning plate 3 has positioning holes 31 for each of the two tabs 202 of each battery cell 201. Each tab 202 passes through the corresponding positioning hole 31 and abuts against the hole wall of the positioning hole 31. The number of positioning holes 31 is the same as the number of tabs 202 and they are set one-to-one. Each tab 202 can pass through the positioning hole 31, thereby achieving precise positioning of each tab 202 and further preventing the battery cell 201 from moving as a whole.

[0041] In use, multiple battery cells 201 are first arranged neatly in the limiting space 11. Then, the positioning plate 3 is placed on top of the multiple battery cells 201, and each tab 202 passes through the corresponding positioning hole 31. Then, the limiting plate 2 is placed on the positioning plate 3, and the aluminum busbar 204 is placed in the welding hole 21 to facilitate welding operations.

[0042] In one embodiment, the inner circumferential side of the top of the enclosure 13 is recessed downward to form an annular step 131, and the positioning plate 3 is supported on the annular step 131. By providing the annular step 131 on the inner circumferential side of the enclosure 13, the positioning plate 3 can be supported on the annular step 131, preventing the positioning plate 3 from shifting or tilting, eliminating the need for other fixing structures, and facilitating disassembly.

[0043] In one embodiment, the top edge of the opening on the enclosure 13 forms a limiting edge, and the limiting plate 2 is supported on the limiting edge so that the limiting plate 2 is located outside the limiting space 11. By supporting the limiting plate 2 on the limiting edge at the top of the enclosure 13 and not extending into the limiting space 11, the elastic tension of the elastic member 15 will not be applied to the battery cell 201 through the limiting plate 2, thus protecting the safety of the battery cell 201.

[0044] In one embodiment, a plurality of limiting areas 111 are formed within the limiting space 11, each limiting area 111 being used to place a battery cell 201, and a partition 16 is provided between any two adjacent limiting areas 111. Understandably, each battery cell 201 is placed in an independent limiting area 111, avoiding mutual compression or misalignment among multiple battery cells 201. The partition 16 plays a role in precise positioning and arrangement guidance, ensuring that each battery cell 201 is quickly and accurately placed within the limiting area 111, thereby improving production efficiency.

[0045] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A welding fixture for a battery cell module, characterized in that, The battery cell module includes multiple battery cells arranged in a horizontal and vertical array, each battery cell being arranged horizontally and having two tabs on its top; the welding fixture includes: The housing forms a limiting space with an opening at the top, the limiting space being used to accommodate the battery cell module, and the housing has first connecting ears on opposite sides along the longitudinal direction; A limiting plate is provided at the opening, and two second connecting ears are provided on opposite sides along the longitudinal direction of the limiting plate. The two second connecting ears extend out of the opening, and the two second connecting ears correspond one-to-one with the two first connecting ears. Each first connecting ear and its corresponding second connecting ear are connected by an elastic element. The limiting plate has a plurality of welding holes for placing aluminum busbars. Each welding hole is used for two adjacent electrodes on two different battery cells to extend into, so that the two electrodes can be welded to the corresponding aluminum busbars to connect the multiple battery cells of the battery cell module in series.

2. The welding fixture for the battery cell module as described in claim 1, characterized in that, Both the first connecting ear and the second connecting ear have connecting holes, and the elastic element is an elastic band, which is wrapped around the two corresponding connecting holes.

3. The welding fixture for the battery cell module as described in claim 1, characterized in that, Furthermore, the two tabs on the top of each of the battery cells are distributed laterally at intervals; some of the welding holes are first welding holes, each of the first welding holes is arranged laterally, and the first welding holes are used to allow two tabs that are distributed laterally adjacent to each other to extend into; the other part of the welding holes are second welding holes, each of the second welding holes is arranged longitudinally, and the second welding holes are used to allow two tabs that are distributed longitudinally adjacent to each other to extend into.

4. The welding fixture for the battery cell module as described in claim 3, characterized in that, The two electrodes extending into the first welding hole abut against the two opposite holes along the transverse direction of the first welding hole, and the two electrodes extending into the second welding hole abut against the two opposite holes along the longitudinal direction of the second welding hole.

5. The welding fixture for the battery cell module as described in claim 1, characterized in that, The limiting plate is also provided with through holes corresponding to the positions of the explosion-proof valves of each of the battery cells.

6. The welding fixture for the battery cell module as described in any one of claims 1 to 5, characterized in that, The housing includes a base plate and a surrounding plate disposed on the top of the base plate. The base plate and the surrounding plate together form the limiting space, and two first connecting ears protrude outward from opposite sides of the base plate.

7. The welding fixture for the battery cell module as described in claim 6, characterized in that, The bottom of the limiting plate is also provided with a positioning plate. The positioning plate has positioning holes for each of the two tabs of each of the battery cells. Each tab passes through the corresponding positioning hole and abuts against the hole wall of the positioning hole.

8. The welding fixture for the battery cell module as described in claim 7, characterized in that, The inner circumference of the top of the enclosure is recessed downward to form an annular step, and the positioning plate is supported on the annular step.

9. The welding fixture for the battery cell module as described in claim 6, characterized in that, The top edge of the opening on the enclosure forms a limiting edge, and the limiting plate is supported on the limiting edge so that the limiting plate is located outside the limiting space.

10. The welding fixture for the battery cell module as described in any one of claims 1 to 5, characterized in that, The limiting space is formed with multiple limiting areas, each of which is used to place one of the battery cells, and a partition is provided between any two adjacent limiting areas.

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