Welding fixture

Abstract

The present invention discloses a welding fixture for clamping a square battery module. The battery module includes a plurality of battery cells and an aluminum row for electrically connecting the plurality of battery cells. The welding fixture includes a first part, a second part, and a third part. The second part and the third part are simultaneously disposed on the first part, or the second part and the third part are connected and the second part or the third part is disposed on the first part. The first part is used to clamp the battery module in the height direction, the second part is used to clamp the battery module in the length direction, and the third part is used to clamp the battery module in the width direction. The welding fixture of the present invention enables the battery module to be flipped during the process of manufacturing the battery module, so that the end plate and the side plate can be welded together and the aluminum row and the battery cells can be welded together with one clamping, avoiding clamping twice and greatly improving the production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of batteries, and in particular to a welding fixture. Background Art

[0002] New energy vehicles have become the development trend of the times. Their environmental friendliness has unmatched advantages over traditional vehicles, especially electric vehicles, which have developed rapidly.

[0003] Electric vehicles are powered by battery modules. In the prior art, a battery module is composed of a plurality of battery cells electrically connected via an aluminum busbar. The battery module includes a shell, in which the battery cells are arranged. The battery module is a rectangular parallelepiped structure. The shell includes end plates and side plates. The end plates are located at the ends of the rectangular parallelepiped in the length direction, and the side plates are located at the sides of the rectangular parallelepiped in the width direction. During the assembly and welding process of the battery module, on the one hand, the end plates and the side plates are welded together first, and then the aluminum busbar is welded together with the battery cells. During the assembly process, manpower and equipment are seriously wasted, and the production efficiency is low. On the other hand, due to the gap between the battery cells and the aluminum busbar, welding fires occur, and the production qualification rate is low. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a welding fixture to solve the problem of low battery module assembly efficiency.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A welding fixture is used to clamp a square battery module, wherein the battery module includes a plurality of battery cells and an aluminum bar for electrically connecting the plurality of battery cells, and comprises a first part, a second part and a third part, wherein the second part and the third part are simultaneously arranged on the first part, or the second part and the third part are connected and the second part or the third part is arranged on the first part; the first part is used to clamp the battery module in the height direction, the second part is used to clamp the battery module in the length direction, and the third part is used to clamp the battery module in the width direction.

[0007] Preferably, the first part includes a base and a pressing plate, the battery module is mounted on the base, the pressing plate is pressed on a side of the battery module where the aluminum row is arranged, and the pressing plate can cooperate with the aluminum row.

[0008] Preferably, the first part further includes a first reinforcing component, which is disposed on the base and located on a side of the base away from the pressing plate.

[0009] Preferably, a concave portion and a convex portion are arranged at intervals on the side of the pressing plate facing the base, and the convex portion can abut against the battery module.

[0010] Preferably, the second part includes a movable part and a fixed part, the fixed part is fixedly arranged on the first part, and the movable part can approach or move away from the fixed part along the length direction. When the movable part approaches the fixed part, the battery module is clamped in the length direction, and when the movable part moves away from the fixed part, the battery module is released in the length direction.

[0011] Preferably, the second part further includes a second reinforcing component, which is disposed on the fixed component and located on the outer side of the fixed component, where the outer side of the fixed component refers to a side away from the movable component.

[0012] Preferably, the second part further comprises a mounting component, the mounting component is fixedly arranged on the first part, the movable component is arranged on the mounting component, and the movable component can move relative to the mounting component.

[0013] Preferably, the first part includes a base and a pressure plate, the battery module is mounted on the base, the pressure plate is pressed on a side of the battery module where the aluminum row is arranged, and the mounting component and / or the fixing component are connected to the base and the pressure plate.

[0014] Preferably, the third part includes two fixing members arranged opposite to each other along the width direction, the two fixing members are fixedly arranged, and the battery module is arranged on the two fixing members.

[0015] Preferably, the fixing member comprises a mounting portion and a clamping portion, the mounting portion can be mounted on the base, and the clamping portion clamps two side surfaces of the battery module in the width direction.

[0016] The welding fixture of the present invention clamps the battery module in the length, width and height directions of the battery module through the cooperation of the first part, the second part and the third part, so that in the process of preparing the battery module, the battery module can be turned over, and the end plate and the side plate can be welded together by clamping once, and the aluminum bar and the battery cell can be welded together at the same time, avoiding clamping twice, and greatly improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings.

[0018] Figure 1 is a front view of a welding fixture in a specific embodiment of the present invention;

[0019] Figure 2It is the top view of the welding fixture in the specific embodiment of the present invention;

[0020] Figure 3 It is the left view of the welding fixture in the specific embodiment of the present invention.

[0021] In the figure:

[0022] 1. First part; 11. Base; 12. Pressure plate; 121. Recess; 122. Protrusion; 13. First strengthening member;

[0023] 2. Second part; 21. Movable member; 22. Fixed member; 23. Second strengthening member; 24. Mounting member;

[0024] 3. Third part; 31. Fixing member; 311. Mounting portion; 312. Clamping portion. Specific embodiment

[0025] The following describes the present invention based on embodiments, but the present invention is not limited to these embodiments. In the following detailed description of the present invention, some specific details are described in detail.

[0026] In addition, those of ordinary skill in the art should understand that the drawings provided herein are for illustrative purposes only, and the drawings are not necessarily drawn to scale.

[0027] Unless the context clearly requires otherwise, the words such as "including", "comprising" and the like in the whole specification and claims should be interpreted as the meaning of inclusion rather than exclusion or exhaustive meaning; that is, the meaning of "including but not limited to".

[0028] In the description of the present invention, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0029] Referring to Figures 1 - 3 As shown, the present invention provides a welding fixture for clamping a square battery module. The battery module includes a plurality of battery cells and an aluminum row for electrically connecting the plurality of battery cells. The battery module further includes an end plate and a side plate located outside the battery cells. The end plate is located in the length direction of the battery module, and the side plate is located in the width direction of the battery module. It should be noted that at this time, the connection reliability between the side plate, end plate, battery cells, and aluminum row of the battery module is insufficient, and only the side plate, end plate, battery cells, and aluminum row are arranged in a correct position, and there is no reliable connection relationship between the side plate, end plate, battery cells, and aluminum row.

[0030] The welding fixture includes a first part 1, a second part 2, and a third part 3, asFigure 1 As shown, the second part 2 and the third part 3 are simultaneously arranged on the first part 1, or the second part 2 and the third part 3 are connected and the second part 2 or the third part 3 is arranged on the first part 1, the first part 1 is used to clamp the battery module in the height direction, the second part 2 is used to clamp the battery module in the length direction, and the third part 3 is used to clamp the battery module in the width direction. The battery module is clamped in the length direction, width direction and height direction of the battery module by the cooperation of the first part 1, the second part 2 and the third part 3, so that in the process of preparing the battery module, the battery module can be turned over, and the end plate and the side plate can be welded together by one clamping, and the aluminum bar and the battery cell can be welded together at the same time, avoiding clamping twice, reducing the production process, reducing the manpower and material costs, and greatly improving the production efficiency. In particular, the first part 1 makes it possible for there to be no gap between the battery cell and the aluminum bar. When welding the battery cell and the aluminum bar, the problem of explosion due to welding between the battery cell and the aluminum bar can be avoided, and the safety and qualified rate of welding are increased.

[0031] The first part 1 includes a base 11 and a pressing plate 12. Figure 1 As shown, the pressing plate 12 can be, for example, an insulating rigid material, the battery module is mounted on the base 11, the pressing plate 12 is pressed on the side of the battery module where the aluminum row is arranged, and the pressing plate 12 can cooperate with the aluminum row. Preferably, the first part 1 also includes a first reinforcing component 13, the first reinforcing component 13 is arranged on the base 11, and the first reinforcing component 13 is located on the side of the base 11 away from the pressing plate 12, the first reinforcing component 13 is, for example, two long strips, the first reinforcing component 13 is arranged on the base 11, and the arrangement of the first reinforcing component 13 can increase the strength of the base 11, thereby allowing the battery module to be reliably placed on the base 11.

[0032] The side of the pressing plate 12 facing the base 11 is provided with a concave portion 121 and a convex portion 122 at intervals. Figure 1 As shown, the protrusion 122 can be pressed against the battery module, and the base 11 and the pressing plate 12 cooperate to clamp the battery module in the height direction of the battery module.

[0033] The second part 2 includes a movable part 21 and a fixed part 22. Figure 1 and Figure 2As shown, the fixed component 22 is fixedly arranged on the first part 1, and the movable component 21 can approach or move away from the fixed component 22 along the length direction. When the movable component 21 approaches the fixed component 22, the battery module is clamped in the length direction. When the movable component 21 moves away from the fixed component 22, the battery module is released in the length direction.

[0034] The second portion 2 further comprises a second reinforcing member 23, such as Figure 1 As shown, the second reinforcing component 23 is arranged on the fixing component 22, and the second reinforcing component 23 is located on the outer side of the fixing component 23. The outer side of the fixing component 23 refers to the side away from the movable component 21. The second reinforcing component 23 can be, for example, a long strip rod. The second reinforcing component 23 can increase the structural strength of the fixing component 22, so that when the battery module is clamped, the fixing component 22 can effectively clamp the battery module.

[0035] The second part 2 also includes a mounting member 24, such as Figure 1 and Figure 2 As shown, the mounting component 24 is fixedly arranged on the first part 1, the movable component 21 is arranged on the mounting component 24, the movable component 21 can move relative to the mounting component 24, the mounting component 24 and the fixed component 22 are arranged at both ends of the base 11 relative to each other, and the movable component 21 moves relative to the mounting component 24 to achieve the movable component 21 moving away from and approaching the fixed component. For example, the mounting component 24 is provided with an internal thread, and the movable component 21 is formed with an external thread, and the movable component 21 is rotated to achieve the movement of the movable component 21 relative to the mounting component 24. Preferably, the second reinforcing component 23 is arranged on the mounting component 24 to increase the structural strength of the mounting component 24, so that when the battery module is clamped, the mounting component 24 can effectively clamp the battery module.

[0036] In actual use, two ends of the pressing plate 12 are respectively mounted on the mounting component 24 and the fixing component 22 .

[0037] The third portion 3 includes two fixing members 31 arranged opposite to each other along the width direction. Figure 1 and Figure 3As shown, the two fixing members 31 are fixedly arranged, and the battery module is arranged between the two fixing members 31. The fixing member 31 includes an installation portion 311 and a clamping portion 312. In a specific embodiment, the installation portion 311 can be installed on the base 11. The installation portion 311 and the clamping portion 312 are arranged at an angle, and the clamping portion 312 clamps the two side surfaces in the width direction of the battery module. In another specific embodiment, the installation portion 311 is installed on the fixing member 22 or the installation member 24, and the angle between the installation portion 311 and the clamping portion 312 is 0 degrees.

[0038] The specific use process of the welding fixture of the present invention is as follows:

[0039] First, arrange the battery cells according to the series or parallel setting requirements, and bond the opposite surfaces between adjacent two battery cells together with double-sided adhesive tape;

[0040] Second, arrange the two end plates at both ends in the length direction of the battery module, and bond the end plates and the battery cells together;

[0041] Third, arrange the two side plates on both sides in the width direction of the battery module, and the side plates are buckled on the end plates;

[0042] Fourth, assemble the aluminum busbars on the battery cells according to the design requirements to form a battery module;

[0043] Fifth, place the battery module on the base 11, and make one end of the battery module abut against the fixing member 22. Threadedly install the fixing member 31 on the base 11 to clamp the battery module in the width direction of the battery module;

[0044] Sixth, fix the pressing plate 12 on the installation member 24 and the fixing member 22 with bolts to clamp the battery module in the height direction of the battery module;

[0045] Seventh, rotate the fixture and the battery module 180 degrees in the height direction, with the pressing plate 12 facing down and the base 11 facing upward;

[0046] Eighth, adjust the movable member 21 to clamp the battery module in the length direction of the battery module;

[0047] Ninth, place the battery module and the fixture on the welding equipment, weld the side plates and the end plates together, and at the same time weld the battery cells and the aluminum busbars together.

[0048] It is easy for those skilled in the art to understand that, on the premise of no conflict, the above preferred solutions can be freely combined and superimposed.

[0049] The above are only the preferred embodiments of the present invention and are 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 replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for using a welding fixture in a welding process, wherein the welding fixture is used to clamp a square battery module, wherein the battery module includes a plurality of battery cells and an aluminum bar for electrically connecting the plurality of battery cells. It is characterized in that The welding fixture comprises a first part, a second part and a third part, the second part and the third part are arranged on the first part at the same time, or the second part and the third part are connected and the second part or the third part is arranged on the first part; the first part is used to clamp the battery module in the height direction, the second part is used to clamp the battery module in the length direction, and the third part is used to clamp the battery module in the width direction; the first part comprises a base and a pressing plate, the battery module is mounted on the base, the pressing plate is pressed on a side of the battery module where the aluminum bar is arranged, and the pressing plate can cooperate with the aluminum bar, and the side of the pressing plate facing the base is provided with a concave part and a convex part at intervals, and the convex part can abut against the battery module; The method of use comprises: arranging the battery cells in series or in parallel, and bonding the opposite surfaces of two adjacent battery cells together with double-sided adhesive; arranging two end plates at both ends of the length direction of the battery module, and bonding the end plates and the battery cells together; arranging two side plates at both sides of the width direction of the battery module, and buckling the side plates on the end plates; assembling the aluminum bar on the battery cell according to the design requirements to form a battery module; placing the battery module on the base, and making one end of the battery module abut against the fixing component, threading the fixing component on the base to clamp the battery module in the width direction of the battery module; fixing the pressing plate to the mounting component and the fixing component with bolts to clamp the battery module in the height direction of the battery module; rotating the clamp and the battery module 180 degrees in the height direction, with the pressing plate facing downward and the base facing upward; adjusting the movable component to clamp the battery module in the length direction of the battery module; placing the battery module and the clamp on the welding equipment, welding the side plate and the end plate together, and welding the battery cell and the aluminum bar together at the same time.

2. The method of use according to claim 1, It is characterized in that The first part further includes a first reinforcing component, which is disposed on the base and is located on a side of the base away from the pressing plate.

3. The method of use according to claim 1, It is characterized in that The second part includes a movable part and a fixed part, the fixed part is fixedly arranged on the first part, and the movable part can approach or move away from the fixed part along the length direction. When the movable part approaches the fixed part, the battery module is clamped in the length direction, and when the movable part moves away from the fixed part, the battery module is released in the length direction.

4. The method of use according to claim 3, It is characterized in that The second part further includes a second reinforcing member, the second reinforcing member is disposed on the fixing member, the second reinforcing member is located outside the fixing member, and the outside of the fixing member refers to the side away from the movable member.

5. The usage method according to claim 3, wherein, the second part further includes a mounting member, the mounting member is fixedly disposed on the first part, the movable member is disposed on the mounting member, and the movable member can move relative to the mounting member.

6. The usage method according to claim 3, wherein, the mounting member and / or the fixing member are connected to the base and the pressing plate.

7. The usage method according to claim 1, wherein, the third part includes two fixing members oppositely disposed along the width direction, the two fixing members are fixedly disposed, and the battery module is disposed between the two fixing members.

8. The usage method according to claim 7, wherein, the fixing member includes a mounting portion and a clamping portion, the mounting portion can be mounted on the base, and the clamping portion clamps both side surfaces of the battery module in the width direction.

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