Welding device for battery module

Abstract

The utility model relates to a welding device for a battery module, which comprises at least two pressure head components, a sliding table component and a lifting mechanism, and is characterized in that the pressure head components are used for positioning the battery module and performing laser vibration welding; the pressing head assembly is connected with the sliding table assembly, and the sliding table assembly can drive the pressing head assembly to ascend and descend synchronously. The lifting mechanism is used for driving the sliding table assembly to lift. The lifting mechanism drives the sliding table assembly to ascend and descend, and the sliding table assembly drives the pressure head assembly to ascend and descend synchronously; the pressing head assembly can ensure that the pressing head is completely attached to the battery module, and the quality of galvanometer welding of the pressing head to the battery module is improved. And meanwhile, the pressure head assembly can move horizontally and can adapt to battery modules with different sizes.

Description

Technical Field

[0001] The utility model relates to the technical field of battery welding, in particular to a welding device for a battery module. Background Art

[0002] In the production process of module welding of power batteries, in order to ensure the welding quality, it is necessary to check and verify the working state of the laser at the start of production. In traditional welding technology, the required battery module is usually manually moved to the welding head for welding. During welding, manual pressing is required, which increases the labor intensity of workers and may easily cause personal injuries. The welding consistency of products is poor, and different sizes of battery module pads need to be configured according to the height of the pressing head to manually adjust the distance between the pressing head and the battery module, with low automation. In addition, in the traditional technology, the interface of the shielding gas is separately arranged from the laser galvanometer, which is not conducive to the jet protection of the shielding gas for the battery module.

[0003] Application No.: 202223211190.0, Application Date: December 1, 2022, Utility Model Name: A Galvanometer Laser Welding Device for Battery Modules, applied in the technical field of welding equipment. The key points of its technical solution are: including a base and two sets of feeding devices, a galvanometer laser welding mechanism and a pressing device arranged on the base. The pressing device includes a plurality of lifting electric cylinders installed on the base. The top sides of the plurality of lifting electric cylinders are commonly connected with a lifting cross beam. A first X-axis driving member is installed on the lifting cross beam, and a double pressing head assembly is arranged on the first X-axis driving member. The technical effect is: to conveniently and quickly complete the pressing and welding of the battery module.

[0004] After moving the battery module below the galvanometer laser welding mechanism in the above-mentioned prior art, at least two more steps are required (corresponding to two systems of the pressing device and the galvanometer laser welding structure): First, drive the pressing cylinder. The pressing cylinder pushes the compression spring, and the compression spring pushes the pressing plate under the action of elastic force, so that the pressing plate presses the tab, and then the battery module is pressed. Second, weld the battery module through the galvanometer laser welding mechanism arranged elsewhere. However, the laser welding galvanometer cannot ensure complete fitting with the battery module, so the welding quality of the battery module cannot be guaranteed.

[0005] In addition, only two shielding gas nozzles are arranged in the above-mentioned prior art and are separately arranged from the galvanometer laser welding mechanism. The function is only to blow away the dust around the battery module and cannot protect the welding working surface of the battery module from oxidation. Summary of the Utility Model

[0006] In view of the defect that the galvanometer for laser welding in the above-mentioned existing technology cannot ensure complete fitting with the battery module, so the welding quality of the battery module cannot be guaranteed, and the shielding gas nozzle only blows away the soot around the battery module and cannot protect the welding working surface of the battery module from oxidation, the purpose of the present utility model is to provide a welding device for a battery module.

[0007] The technical solution provided by the present utility model is as follows:

[0008] A welding device for a battery module, comprising:

[0009] A platen assembly, there are at least two of such platen assemblies, which are used to position the battery module and perform laser vibration welding;

[0010] A slide table assembly, the platen assembly is connected to the slide table assembly, and the slide table assembly can drive the platen assembly to lift synchronously;

[0011] A lifting mechanism, this lifting mechanism is used to drive the slide table assembly to lift.

[0012] Further, it further includes a workbench, and a vertical support plate is installed on this workbench; the lifting mechanism is fixed on the vertical support plate, and this lifting mechanism includes a lifting drive assembly and a vertical chute arranged in parallel with the lifting drive assembly (11); the lifting drive assembly is used to drive the slide table assembly to lift along the vertical chute.

[0013] Further, the lifting drive assembly includes a handle and a lead screw connected to the handle; a first slider fixedly installed on the slide table assembly is slidably connected to the lead screw; the handle is used to drive the first slider to lift along the lead screw.

[0014] Further, a second slider is fixedly installed on the slide table assembly, is adapted to the vertical chute, and lifts along the vertical chute; the first slider drives the second slider to lift synchronously.

[0015] Further, the platen assembly is located below the slide table assembly; this platen assembly includes a limit mounting block and a sliding seat plate adapted to the limit mounting block.

[0016] Further, the limit mounting block is fixedly connected to the slide table assembly; a horizontal push rod and a positioning rod are arranged on the side of the slide table assembly; the horizontal push rod is used to push the sliding seat plate to move horizontally along the limit mounting block, and the positioning rod is used to limit the horizontal movement of the sliding seat plate.

[0017] Further, each platen assembly further includes a platen located below the sliding seat plate; the platen is elastically connected to the sliding seat plate by a spring; the spring is used to make the platen fit completely with the battery module.

[0018] Further, there are a pair of limiting mounting blocks, which are L-shaped and symmetrically arranged on both sides of the sliding seat plate; the cross-section of the sliding seat plate is T-shaped; the sliding seat plate drives the pressing head to move horizontally along the L-shaped horizontal track of the limiting mounting block.

[0019] Further, the pressing head assembly is provided with a blowing system for preventing the welding working surface of the battery module from being oxidized; the blowing system includes a blowing port and a first air passage communicated with the blowing port; it further includes a plurality of second air passages, and the second air passages are simultaneously communicated with the first air passage and the inner cavity of the pressing head; the ventilation holes formed by the second air passages on the inner cavity wall of the pressing head are evenly distributed.

[0020] Further, the blowing port is located on the outer wall of the pressing head, and the first air passage and the second air passages are arranged inside the pressing head; the number of the second air passages is not less than 8 and they are parallel to each other.

[0021] Adopting the technical solution provided by the present utility model, compared with the prior art, it has the following beneficial effects:

[0022] In the present utility model, the lifting mechanism drives the sliding table assembly to lift, and the sliding table assembly drives the pressing head assembly to lift synchronously; a spring is arranged on the pressing head assembly, and the spring undergoes elastic compression, which can ensure that the pressing head completely fits the battery module and improve the quality of the galvanometer welding of the pressing head to the battery module. At the same time, the pressing head assembly can move horizontally to adapt to battery modules of different sizes.

[0023] In addition, the pressing head assembly is provided with a blowing system for introducing a protective gas from the blowing port into the first air passage, and then from the first air passage into a plurality of uniformly distributed second air passages. The second air passages are communicated with the inner cavity of the pressing head, so that the protective gas can uniformly fill the pressing head and ensure that the welding working surface of the battery module is not oxidized. The pressing head assembly is also provided with a dust blowing port for blowing away the dust on the welding working surface of the battery module. Description of the Drawings

[0024] Figure 1 It is a schematic diagram of the overall structure of a welding device for a battery module in an embodiment of the present application;

[0025] Figure 2 It is a schematic diagram of the overall structure of a welding device for a battery module in another perspective in an embodiment of the present application;

[0026] Figure 3 It is a schematic diagram of the overall structure of the sliding table assembly and the pressing head assembly in an embodiment of the present application;

[0027] Figure 4 It is a schematic diagram of the overall structure of the sliding table assembly and the pressing head assembly in another perspective in an embodiment of the present application;

[0028] Figure 5 It is a schematic diagram of the overall structure of the pressing head assembly in an embodiment of the present application;

[0029] Figure 6 It is a schematic diagram of the overall structure of the indenter assembly from another perspective in an embodiment of the present application;

[0030] Figure 7 It is a cross-sectional view of the indenter assembly in an embodiment of the present application;

[0031] Figure 8 It is an internal perspective view of the slide table assembly and the indenter assembly in an embodiment of the present application.

[0032] Explanation of the reference numerals in the schematic diagram:

[0033] Lifting drive assembly 11, vertical chute 12, handle 111, lead screw 112;

[0034] Slide table assembly 2, first slider 21, second slider 22, horizontal push rod 23, positioning rod 24;

[0035] Indenter assembly 3, limit mounting block 31, sliding seat plate 32, indenter 33, spring 34, sliding shaft 341, sliding sleeve 342, air blowing port 35, first air passage 36, second air passage 37, dust blowing port 38;

[0036] Battery module 4;

[0037] Workbench 5, vertical support plate 51. Detailed implementation manners

[0038] To further understand the content of the present invention, the present invention will be described in detail in combination with the accompanying drawings and embodiments.

[0039] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limited conditions under which the present invention can be implemented. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that the technical content disclosed in the present invention can cover. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and the like cited in this specification are only for the convenience of clear narration and are not used to limit the scope that can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope that the present invention can be implemented.

[0040] A welding device for a battery module in the present application includes a lifting mechanism, a slide table assembly 2, an indenter assembly 3, a battery module 4, and a workbench 5.

[0041] A vertical support plate 51 is installed on the workbench 5, and the lifting mechanism is fixed to the vertical support plate 51. The lifting mechanism includes a lifting drive assembly 11 and a vertical chute 12. The vertical chute 12 is arranged in parallel with the lifting drive assembly 11. It is preferably to set 2 vertical chutes 12. The lifting drive assembly 11 is used to drive the slide assembly 2 to lift along the vertical chute 12.

[0042] More specifically, the lifting drive assembly 11 includes a handle 111 and a lead screw 112 connected to the handle 111. Correspondingly, a first slider 21 that cooperates with the lead screw 112 is provided on the slide assembly 2, and the first slider 21 is slidably connected to the lead screw 112; a second slider 22 that cooperates with the vertical chute 12 is also provided on the slide assembly 2, and the second slider 22 is slidably connected to the vertical chute 12. Rotate the handle 111 to drive the first slider 21 to lift along the lead screw 112, and the first slider 21 drives the second slider 22 to lift synchronously along the vertical chute 12, that is, rotating the handle 111 drives the slide assembly 2 to lift.

[0043] Setting the vertical chute 12 on the vertical support plate 51 and setting the second slider 22 that cooperates with the vertical chute 12 on the slide assembly 2 is to prevent the slide assembly 2 from shaking or shifting during the lifting process. In addition, the integration of the specific components of the lifting drive assembly 11 is not limited to the above technical solution, and any solution that can stably drive the slide assembly 2 to lift falls within the protection scope of this application.

[0044] The indenter assembly 3 is connected to the slide assembly 2, and the indenter assembly 3 is located below the slide assembly 2. The slide assembly 2 is used to drive the indenter assembly 3 to lift synchronously. The indenter assembly 3 includes a limit mounting block 31, a sliding seat plate 32 that can move horizontally along the limit mounting block 31, and an indenter 33 located below the sliding seat plate 32. The limit mounting block 31 is fixedly connected to the slide assembly 2. A horizontal push rod 23 and a positioning rod 24 are arranged on the side of the slide assembly 2. The horizontal push rod 23 is used to push the sliding seat plate 32 to move horizontally along the limit mounting block 31, and the positioning rod 24 is used to limit the horizontal movement of the sliding seat plate 32; the horizontal push rod 23 and the positioning rod 24 are used to adjust the horizontal position of the indenter 33 so that the indenter 33 is directly above the battery module 4 that needs to be laser vibration welded; the indenter 33 is elastically connected to the sliding seat plate 32 through a spring 34, and the spring 34 is used to make the indenter 33 fit perfectly with the battery module 4.

[0045] More specifically, it is preferably to set two limit mounting blocks 31, which are arranged oppositely, and the shape is preferably L-shaped; the sliding seat plate 32 is located between the limit mounting blocks 31, and the cross-section of the sliding seat plate 32 is T-shaped, which is adapted to the L-shaped of the limit mounting blocks 31; the sliding seat plate 32 drives the pressing head 33 to move horizontally along the L-shaped horizontal track of the limit mounting blocks 31. Preferably, there are two horizontal push rods 23 and one positioning rod 24, and the positioning rod 24 is located between the horizontal push rods 23. The horizontal push rods 23 and the positioning rod 24 are preferably bolt structures, and threaded holes adapted to the bolts are provided on the side surface of the sliding seat plate 32.

[0046] To ensure that the spring 34 does not twist and deform when being compressed, which may cause the pressing head 33 to shift, the spring 34 is sleeved outside the sliding shaft 341. One end of the sliding shaft 341 is fixedly connected to the pressing head 33. The sliding seat plate 32 is provided with a through hole for the sliding shaft 341 to pass through. A sliding sleeve 342 is arranged in the through hole. The sliding shaft 341 can move vertically relative to the sliding sleeve 342. The sliding sleeve 342 is used to increase the friction with the sliding shaft 341, so that the pressing head 33 fits more closely with the battery module 4.

[0047] The pressing head assembly 3 further includes a blowing system for preventing the welding working surface of the battery module 4 from being oxidized. The blowing system includes a blowing port 35, a first air passage 36, and a plurality of second air passages 37; the blowing port 35 is located on the outer side wall of the pressing head 33 and there are no less than two. The ends of the first air passage 36 and the plurality of second air passages 37 are blocked, and both air passages are arranged inside the pressing head 33. The first air passage 36 is connected to the blowing port 35, the second air passages 37 are connected to the first air passage 36, and there are no less than 8 second air passages 37. The second air passages 37 form uniformly distributed ventilation holes on the inner cavity wall of the pressing head 33, so that the protective gas can uniformly fill the pressing head 33.

[0048] A dust blowing port 38 is also provided on the pressing head assembly 3 for blowing away the dust on the welding working surface of the battery module 4.

[0049] During use, the lifting drive assembly 11 drives the slide table assembly 2 to lift and lower. The slide table assembly 2 drives the pressing head assembly 3 to lift and lower synchronously. After the pressing head assembly 3 descends to a position relatively close to the battery module 4, the sliding seat plate 32 is finely adjusted through the horizontal push rods 23 and the positioning rod 24, so that the pressing head 33 is located directly above the welding working surface of the battery module 4. After the adjustment is completed, the lifting drive assembly 11 continues to drive the slide table assembly 2 to descend, so that the pressing head assembly 3 abuts against the battery module 4. The slide table assembly 2 continues to descend. At this time, the descent of the pressing head assembly 3 is restricted, so that the spring 34 is compressed, and the pressing head 33 is squeezed and fits closely with the battery module 4. A locking device is also provided on the lifting drive assembly 11. Through the locking device, the slide table assembly 2 is limited, so that the spring 34 and the pressing head 33 are relatively fixed. When performing laser vibration welding, the protective gas provided by the blowing system fully covers the pressing head 33, improving the welding quality.

[0050] The above has schematically described the present utility model and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present utility model, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the creation of the present utility model, creatively design structural manners and embodiments similar to this technical solution, they shall fall within the protection scope of the present utility model.

Claims

1. A welding device for a battery module, Features: include, A pressing head assembly (3), at least two of which are used to position the battery module (4) and perform laser vibration welding; each of the pressing head assemblies (3) comprises a pressing head (33); A slide assembly (2), the pressure head assembly (3) is connected to the slide assembly (2), and the slide assembly (2) can drive the pressure head assembly (3) to rise and fall synchronously; A lifting mechanism, the lifting mechanism is used to drive the slide assembly (2) to move up and down; The pressure head assembly (3) is provided with an air blowing system for preventing the welding working surface of the battery module (4) from being oxidized; The blowing system comprises a blowing port (35) and a first air path (36) communicating with the blowing port (35); The blowing system further comprises a plurality of second air paths (37), wherein the second air paths (37) are connected to the first air path (36) and the inner cavity of the pressure head (33) at the same time; the ventilation holes formed in the inner cavity wall of the pressure head (33) of the second air paths (37) are evenly distributed.

2. A welding device for a battery module according to claim 1, characterized in that: It also includes a workbench (5), on which a vertical support plate (51) is installed; The lifting mechanism is fixed on the vertical support plate (51), and comprises a lifting drive assembly (11) and a vertical slide groove (12) arranged parallel to the lifting drive assembly (11); The lifting drive assembly (11) is used to drive the slide assembly (2) to lift and lower along the vertical slide groove (12).

3. A welding device for a battery module according to claim 2, characterized in that: The lifting drive assembly (11) comprises a handle (111) and a screw rod (112) connected to the handle (111); a first sliding block (21) fixedly mounted on the slide assembly (2) is slidably connected to the screw rod (112); and the handle (111) is used to drive the first sliding block (21) to lift and lower along the screw rod (112).

4. A welding device for a battery module according to claim 3, characterized in that: The second sliding block (22) is fixedly mounted on the slide assembly (2), adapted to the vertical slide groove (12), and is lifted and lowered along the vertical slide groove (12); the first sliding block (21) drives the second sliding block (22) to be lifted and lowered synchronously.

5. A welding device for a battery module according to claim 1, characterized in that: The pressure head assembly (3) is located below the slide assembly (2); The pressure head assembly (3) comprises a position limiting mounting block (31) and a sliding seat plate (32) adapted to the position limiting mounting block (31).

6. A welding device for a battery module according to claim 5, characterized in that: The limit mounting block (31) is fixedly connected to the slide assembly (2); a horizontal push rod (23) and a positioning rod (24) are arranged on the side of the slide assembly (2); the horizontal push rod (23) is used to push the sliding seat plate (32) to move laterally along the limit mounting block (31), and the positioning rod (24) is used to limit the lateral movement of the sliding seat plate (32).

7. A welding device for a battery module according to claim 5, characterized in that: The pressing head (33) is located below the sliding seat plate (32); the pressing head (33) and the sliding seat plate (32) are elastically connected via a spring (34); the spring (34) is used to make the pressing head (33) and the battery module (4) completely fit together.

8. A welding device for a battery module according to claim 7, characterized in that: The limiting mounting blocks (31) are in a pair and are L-shaped and symmetrically arranged on both sides of the sliding seat plate (32); the sliding seat plate (32) has a T-shaped cross section; the sliding seat plate (32) drives the pressure head (33) to move laterally along the L-shaped horizontal track of the limiting mounting block (31).

9. A welding device for a battery module according to claim 1, characterized in that: The number of the second gas paths (37) is no less than 8 and they are parallel to each other.

Images