A welding fixture for battery modules and a clamping system for welding.

Abstract

This utility model discloses a welding fixture for battery modules and a welding clamping system. The welding fixture includes: a base; a first guide rail disposed on the base; a first slider slidably disposed on the first guide rail; an end-facing pressure head fixedly connected to the first slider, used to abut against the end plate of a battery module; a hinge joint disposed on the base; and a lateral pressure plate rotatably mounted on the hinge joint, used to abut against the side plate of the battery module. By applying this utility model, a welding fixture and corresponding clamping system suitable for battery modules are provided, which can effectively limit and clamp the end plate and side plate of the battery module, and the end plate and side plate are subjected to uniform force, ensuring accurate positioning between them, ensuring subsequent welding quality, and further improving the product quality of the welded battery module.

Description

Technical Field

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

[0002] Currently, laser welding is the most critical step in the production of lithium battery modules, and it also has a high defect rate. Therefore, in terms of process quality, extremely high workpiece positioning accuracy is required for the welding equipment of the end plates and side plates of the battery modules.

[0003] However, the traditional pressing method for welding module end plates generally just presses the module end plate and side plate together on the corresponding tooling tray, without taking into account factors such as the deflection error of the module on the tooling tray and the accuracy error of the positioning tooling. As a result, it cannot guarantee the consistency of the pressing state of the module end plates, which can easily lead to unqualified module dimensions and welding position deviation after welding. It can also cause quality problems such as weld cracking or insufficient welding pull-out force due to uneven stress. Utility Model Content

[0004] In view of this, and to solve the above problems, the purpose of this utility model is to provide a welding fixture for battery modules, comprising:

[0005] Base;

[0006] The first guide rail is disposed on the base;

[0007] A first slider is slidably disposed on the first guide rail;

[0008] An end-facing pressure head is fixedly connected to the first slider, and the end-facing pressure head is used to abut against the end plate of a battery module;

[0009] A hinge joint, wherein the hinge joint is disposed on the base;

[0010] A lateral pressure plate is rotatably mounted on the hinge joint and is used to abut against the side plate of the battery module.

[0011] In another preferred embodiment, the end-facing pressure head includes a mounting bracket and a pressure head body, one end of the mounting bracket being fixedly connected to the first slider, and the other end of the mounting bracket being fixedly connected to the pressure head body.

[0012] In another preferred embodiment, the end-facing pressure head further includes a dust removal device disposed on one side of the pressure head body.

[0013] In another preferred embodiment, the other side of the pressure head body is connected to the first slider, and the dust removal device has a dust suction port that is positioned facing one end of the pressure head body.

[0014] In another preferred embodiment, the hinge joint includes: a bearing housing, a bearing, a shaft, and a connecting seat. The bearing housing is fixedly disposed on the base, the bearing is fixedly installed on the bearing housing, the shaft is installed inside the bearing, the connecting seat is connected to the shaft, and the connecting seat is connected to the lateral pressure plate.

[0015] In another preferred embodiment, the base has a first surface and a second surface opposite to each other, the lateral pressure plate is disposed close to the second surface relative to the first surface, and the first guide rail is disposed on the first surface.

[0016] In another preferred embodiment, the bearing housing is mounted on the first surface, and a limiting hole is provided on the base, through which the connecting seat is movably disposed.

[0017] In another preferred embodiment, the device further includes a first driving device disposed on the base, the output end of the first driving device being connected to the end pressure head, and the first driving device being used to drive the end pressure head to move along the first guide rail.

[0018] The present invention also aims to provide a welding clamping system, comprising at least two welding fixtures for battery modules as described above, and further comprising: a connecting assembly, wherein the two lateral pressure plates are connected through the connecting assembly.

[0019] In another preferred embodiment, the connecting assembly includes: a connecting frame, a second guide rail, and a second slider, the connecting frame being connected to one of the lateral pressure plates, the second guide rail being disposed on the connecting frame, the second slider being slidably disposed on the second guide rail, and the second slider being connected to the other of the lateral pressure plates.

[0020] Because this utility model adopts the above-mentioned technical solution, it has the following positive effects compared with the prior art:

[0021] By applying this utility model, a welding fixture and corresponding clamping system suitable for battery modules are provided. The end plate of the battery module is limited and squeezed by the end pressure head, and the side plate of the battery module is limited and squeezed by the side plate with the cooperation of the joint. The end plate and side plate of the battery module can be effectively limited and squeezed, and the end plate and side plate are subjected to uniform force, which ensures the accurate position between the two, ensures the subsequent welding quality, and further improves the product quality of the welded battery module. Attached Figure Description

[0022] Figure 1 This is an overall schematic diagram of a welding fixture for a battery module according to the present invention;

[0023] Figure 2 This is a schematic diagram of a welding fixture for a battery module without a first driving device according to the present invention;

[0024] Figure 3 This is a first-view schematic diagram of a welding fixture for a battery module according to the present invention;

[0025] Figure 4 This is a cross-sectional view of a welding fixture for a battery module according to the present invention.

[0026] Figure 5 This is a first installation diagram of the end pressure head of a welding fixture for a battery module according to the present invention;

[0027] Figure 6 This is a second mounting diagram of the end-facing pressure head of a welding fixture for a battery module according to the present invention;

[0028] Figure 7 This is a schematic diagram of the working process of a welding clamping system according to the present invention.

[0029] In the attached image:

[0030] 1. Base; 2. First guide rail; 3. First slider; 4. End pressure head; 5. Hinge joint; 6. Side pressure plate; 7. Mounting bracket; 8. Pressure head body; 9. Dust removal device; 10. Dust suction port; 11. Bearing seat; 12. Bearing; 13. Shaft; 14. Connecting seat; 15. First surface; 16. Second surface; 17. Limiting hole; 18. First driving device; 19. Connecting assembly; 20. Connecting frame; 21. Second guide rail; 22. Second slider; 23. Battery module; 24. End plate; 25. Side plate. Detailed Implementation

[0031] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front", "back", "horizontal", and "vertical" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] It should be noted that the terms "horizontal" and "vertical" in this utility model are used to describe approximate positional relationships, and not strictly "horizontal plane" or "vertical plane".

[0034] like Figures 1 to 6 The image shows a preferred embodiment of a welding fixture for a battery module, comprising: a base 1; a first guide rail 2 disposed on the base 1; a first slider 3 slidably disposed on the first guide rail 2; an end pressure head 4 fixedly connected to the first slider 3, the end pressure head 4 abutting against an end plate 24 of a battery module 23; a hinge joint 5 disposed on the base 1; and a lateral pressure plate 6 rotatably mounted on the hinge joint 5, the lateral pressure plate 6 abutting against a side plate 25 of the battery module 23. Furthermore, when the corresponding battery module 23 needs to be installed, its end plate 24 and side plate 25 are arranged in a preset position, and then the lateral pressure plate 6 is moved in a direction perpendicular to the side plate 25 and abuts against the side plate 25. During this process, the hinge joint 5 can automatically fine-tune the tilt angle of the lateral pressure plate 6 so as to better fit the surface of the side plate 25. The hinge joint 5 is at least used to provide a certain rotatable angle for the lateral pressure plate 6. Then, with the cooperation of the first guide rail 2 and the first slider 3, the end pressure head 4 is clamped at the surface of the end plate 24, thereby achieving precise positioning of the battery module 23 before welding.

[0035] Furthermore, as a preferred embodiment, the rotation axis of the lateral pressure plate 6 provided by the hinge joint 5 is preferably parallel to the surface of the lateral pressure plate 6.

[0036] Furthermore, as a preferred embodiment, the first guide rail 2 is fixedly connected to the surface of the base 1 by bolts.

[0037] Furthermore, as a preferred embodiment, the first guide rail 2 is parallel to the extending direction of the lateral pressure plate 6.

[0038] Furthermore, as a preferred embodiment, the end-facing pressure head 4 includes: a mounting bracket 7 and a pressure head body 8, one end of the mounting bracket 7 is fixedly connected to the first slider 3, and the other end of the mounting bracket 7 is fixedly connected to the pressure head body 8.

[0039] Furthermore, as a preferred embodiment, the pressure head body 8 is configured with an L-shaped plate structure.

[0040] Furthermore, as a preferred embodiment, the mounting bracket 7 and the pressure head body 8 are fixedly connected by bolts.

[0041] Furthermore, as a preferred embodiment, the end-facing pressure head 4 also includes a dust removal device 9, which is disposed on one side of the pressure head body 8. Furthermore, the dust removal device 9 is positioned near the welding location to remove welding fumes.

[0042] Furthermore, as a preferred embodiment, the mounting bracket 7 includes a horizontal plate and a vertical plate connected vertically. The lower surface of the horizontal plate is connected to the first slider 3, one end of the horizontal plate is fixedly connected to one side of the vertical plate, and the other side of the vertical plate is connected to the dust removal device 9.

[0043] Furthermore, as a preferred embodiment, the other side of the vertical plate is connected to the dust removal device 9 by bolts.

[0044] Furthermore, in a preferred embodiment, the other side of the pressure head body 8 is connected to the first slider 3, and the dust removal device 9 has a suction port 10, which is disposed facing one end of the pressure head body 8. Further, the dust removal device 9 is preferably connected to a negative pressure generating device via a pipeline to create a negative pressure at the suction port 10 for drawing out dust.

[0045] Furthermore, as a preferred embodiment, the edge of the pressure head body 8 is formed with a guide surface that is inclined relative to the extension direction of the pressure head body 8, and the axis of the dust suction port 10 is preferably inclined along the extension direction of the guide surface, and the extension direction is preferably set close to the welding position.

[0046] Furthermore, as a preferred embodiment, the hinge joint 5 includes: a bearing seat 11, a bearing 12, a shaft 13, and a connecting seat 14. The bearing seat 11 is fixedly disposed on the base 1, the bearing 12 is fixedly installed on the bearing seat 11, the shaft 13 is installed inside the bearing 12, the connecting seat 14 is connected to the shaft 13, and the connecting seat 14 is connected to the side pressure plate 6.

[0047] Furthermore, as a preferred embodiment, the bearing 12 is installed with an interference fit to the bearing housing 11, and the shaft 13 is installed with an interference fit to the connecting seat 14.

[0048] Furthermore, as a preferred embodiment, the base 1 is configured as a plate structure.

[0049] Furthermore, as a preferred embodiment, the base 1 has a first surface 15 and a second surface 16 opposite to each other, the lateral pressure plate 6 is disposed close to the second surface 16 relative to the first surface 15, and the first guide rail 2 is disposed on the first surface 15.

[0050] Furthermore, in a preferred embodiment, the bearing housing 11 is mounted on the first surface 15, and a limiting hole 17 is provided on the base 1, through which the connecting seat 14 is movably disposed. Further, the setting of the limiting hole 17 provides a certain limitation on the rotational space of the base 1, that is, the inner contour of the limiting hole 17 is slightly larger than the outer contour of the connecting seat 14.

[0051] Furthermore, as a preferred embodiment, it further includes: a first driving device 18, which is disposed on the base 1, and the output end of the first driving device 18 is connected to the end pressure head 4. The first driving device 18 is used to drive the end pressure head 4 to move along the first guide rail 2. Further, the first driving device 18 is preferably a cylinder, which, under the drive of the first driving device 18, causes the end pressure head 4 to press tightly against the end plate 24.

[0052] Furthermore, as a preferred embodiment, there are preferably two first guide rails 2 and two first sliders 3, and both first sliders 3 are connected to the same end pressure head 4.

[0053] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model.

[0054] Based on the above, this utility model also has the following embodiments:

[0055] like Figures 1 to 7 The diagram illustrates a preferred embodiment of a welding clamping system, comprising at least two welding fixtures for battery modules as described above, and further comprising a connecting assembly 19, wherein two side pressure plates 6 are connected via the connecting assembly 19. Furthermore, the connecting assembly 19 is configured such that the two welding fixtures for battery modules act together on one side of the battery module 23.

[0056] In a further embodiment of the present invention, the welding fixtures of the two battery modules connected by the connecting component 19 together form a clamping module. Preferably, two clamping modules are provided on both sides of the battery module 23 respectively, so as to act on the two end plates 24 at both ends and the two side plates 25 on both sides of the battery module 23 respectively.

[0057] In a further embodiment of the present invention, the connecting component 19 preferably adopts a telescopic structure, so that one side pressure plate 6 can slide relative to the other side pressure plate 6.

[0058] In a further embodiment of the present invention, the connecting component 19 includes: a connecting frame 20, a second guide rail 21, and a second slider 22. The connecting frame 20 is connected to one of the lateral pressure plates 6. The second guide rail 21 is disposed on the connecting frame 20. The second slider 22 is slidably disposed on the second guide rail 21. The second slider 22 is connected to the other lateral pressure plate 6.

[0059] In a further embodiment of this utility model, the connecting frame 20 is arranged in an L-shaped body structure.

[0060] In a further embodiment of this utility model, it further includes: a track and at least two second driving devices. The track is disposed above the battery module 23, and the two aforementioned clamping modules are slidably disposed on the track. The two second driving devices are respectively connected to the two clamping modules to drive the two clamping modules to move closer or further apart. Furthermore, the second driving devices are configured such that the two side pressure plates 6 can move closer or further apart to limit and compress the side plates 25 of the battery module 23. The track is used to guide the movement direction of the clamping modules.

[0061] In a further embodiment of this utility model, the track preferably includes: a first track and a second track that are parallel to each other, wherein the two battery modules of each clamping module are respectively mounted on the first track and the second track using welding fixtures, and the two battery module welding fixtures are respectively connected to a second driving device. Furthermore, when there is an inclination on the side plate 25 of the battery module 23, the two battery module welding fixtures can move different distances along the track under the independent drive of the two second driving devices. At this time, with the cooperation of the hinge joint 5, the two lateral pressure plates 6 are inclined together, and the connecting assembly 19 extends accordingly to accommodate the above-mentioned movement distance.

[0062] In a further embodiment of the present invention, the number of second driving devices is preferably four, and the four second driving devices are respectively connected to a battery module 23 using welding fixtures.

[0063] In a further embodiment of this utility model, the second driving device is preferably a cylinder.

[0064] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A welding fixture for a battery module, characterized in that, include: Base; The first guide rail is disposed on the base; A first slider is slidably disposed on the first guide rail; An end-facing pressure head is fixedly connected to the first slider, and the end-facing pressure head is used to abut against the end plate of a battery module; A hinge joint, wherein the hinge joint is disposed on the base; A lateral pressure plate is rotatably mounted on the hinge joint and is used to abut against the side plate of the battery module.

2. The welding fixture for battery modules according to claim 1, characterized in that, The end-facing pressure head includes a mounting bracket and a pressure head body. One end of the mounting bracket is fixedly connected to the first slider, and the other end of the mounting bracket is fixedly connected to the pressure head body.

3. The welding fixture for battery modules according to claim 2, characterized in that, The end-facing pressure head further includes a dust removal device, which is disposed on one side of the pressure head body.

4. The welding fixture for battery modules according to claim 3, characterized in that, The other side of the pressure head body is connected to the first slider, and the dust removal device has a dust suction port, which is positioned facing one end of the pressure head body.

5. The welding fixture for battery modules according to claim 1, characterized in that, The hinge joint includes: a bearing housing, a bearing, a shaft, and a connecting seat. The bearing housing is fixedly disposed on the base, the bearing is fixedly installed on the bearing housing, the shaft is installed inside the bearing, the connecting seat is connected to the shaft, and the connecting seat is connected to the lateral pressure plate.

6. The welding fixture for battery modules according to claim 5, characterized in that, The base has a first surface and a second surface opposite to each other, the lateral pressure plate is disposed closer to the second surface than the first surface, and the first guide rail is disposed on the first surface.

7. The welding fixture for battery modules according to claim 6, characterized in that, The bearing housing is mounted on the first surface, and a limiting hole is provided on the base, through which the connecting seat is movably disposed.

8. The welding fixture for battery modules according to claim 1, characterized in that, Also includes: A first driving device is disposed on the base, and the output end of the first driving device is connected to the end pressure head. The first driving device is used to drive the end pressure head to move along the first guide rail.

9. A welding clamping system, comprising at least two welding fixtures for battery modules as described in any one of claims 1 to 8, characterized in that, Also includes: A connecting assembly is provided, through which the two lateral pressure plates are connected.

10. The welding clamping system according to claim 9, characterized in that, The connecting assembly includes: a connecting frame, a second guide rail, and a second slider. The connecting frame is connected to one of the lateral pressure plates. The second guide rail is disposed on the connecting frame. The second slider is slidably disposed on the second guide rail. The second slider is connected to the other of the lateral pressure plates.

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