Battery cell welding device

Abstract

The utility model provides a battery cell welding device which comprises a plurality of battery cells, supports fixed on the battery cells, a laser welding assembly arranged on the upper sides of the battery cells, and a pressing mechanism arranged corresponding to the busbar, the pressing mechanism comprises a fixing frame arranged on one side of the battery cell and a pressing frame arranged on the fixing frame in a sliding mode, a first elastic piece is arranged between the pressing frame and the fixing frame, a plurality of pressing columns corresponding to the busbars are arranged on the pressing frame, and the laser welding assembly comprises a three-dimensional mobile robot. And the laser welding device is arranged on one side of the three-dimensional mobile robot, and the three-dimensional mobile robot is further provided with a pushing frame corresponding to the pressing frame. When the laser welding device moves to the target position and then moves downwards to conduct welding operation, the pressing column is driven to press the busbar, the insufficient welding probability of the busbar is reduced, meanwhile, welding stability is guaranteed, and welding quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery modules, and particularly relates to a cell welding device. Background Art

[0002] A battery module is assembled by connecting multiple single cells in series and parallel. The bus bar is a tool for realizing the series connection of multiple cells. The bus bar is welded to the poles of multiple single cells to achieve the series connection of multiple single cells.

[0003] In the prior art, high-precision positioning automatic welding can be achieved through a laser welder, and the welding efficiency is high. However, due to the height difference between the bus bar and the cell, virtual welding is likely to occur between the bus bar and the cell, affecting the welding quality. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a cell welding device, aiming to solve the technical problem of low welding quality in the prior art.

[0005] To achieve the above purpose, the utility model is realized through the following technical solutions: A cell welding device includes multiple cells, and brackets fixed on each of the cells. Assembly grooves corresponding to the poles of the cells are provided on the brackets. Bus bars corresponding to the poles are arranged in the assembly grooves. The cell welding device further includes a laser welding assembly arranged on the upper side of the cells, and a pressing mechanism corresponding to the bus bars. The pressing mechanism includes a fixed frame arranged on one side of the cells, and a pressing frame slidably arranged on the fixed frame. A first elastic member is arranged between the pressing frame and the fixed frame. A plurality of pressing columns corresponding to the bus bars are arranged on the pressing frame. The laser welding assembly includes a three-dimensional moving robot, and a laser welder arranged on one side of the three-dimensional moving robot. A pushing frame corresponding to the pressing frame is further arranged on the three-dimensional moving robot.

[0006] Compared with the prior art, the beneficial effect of the utility model lies in that: By arranging a fixed frame on one side of the cell, a pressing frame is slidably arranged on the fixed frame, a plurality of pressing columns are arranged on the pressing frame, and a pushing frame corresponding to the pressing frame is arranged on one side of the three-dimensional moving robot of the laser welding assembly. When the laser welder moves to the target position and then moves downward for welding operations, it drives the pressing columns to press the bus bars, reducing the probability of virtual welding of the bus bars, ensuring stable welding at the same time, and improving the welding quality.

[0007] According to one aspect of the above technical solution, the pressing column includes a fixed part fixed on the fixed frame, and an abutting part slidably arranged on one side of the fixed part. A second elastic member is arranged between the fixed part and the abutting part.

[0008] According to one aspect of the above technical solution, the pressing mechanism further includes an adjusting block movably arranged on the pressing frame, a fastener is detachably arranged between the adjusting block and the pressing frame, and the pressing column is fixed on the adjusting block.

[0009] According to one aspect of the above technical solution, the bus bar includes a main body part, wing parts arranged on both sides of the main body part, and bending parts arranged between the wing parts and the main body part.

[0010] According to one aspect of the above technical solution, the wing part includes a first wing part located in the middle of the bus bar, and second wing parts arranged on both sides of the first wing part. The second wing parts are arranged corresponding to the pole columns, and the pressing column is arranged close to the first wing part.

[0011] According to one aspect of the above technical solution, a slide rail is fixed on the fixing frame, a slider is arranged on the slide rail, the pressing frame is fixed on one side of the slider, a fixing block is further arranged on the fixing frame, a telescopic column is arranged between the fixing block and the slider, and the first elastic member includes a return spring arranged in the telescopic column.

[0012] According to one aspect of the above technical solution, the battery cell welding device further includes a conveying mechanism for driving the movement of the battery cell. The conveying mechanism includes a frame and a conveyor belt arranged in the middle of the frame, and the fixing frame is fixed on the frame.

[0013] According to one aspect of the above technical solution, the three-dimensional moving robot includes a z-axis moving mechanism fixed on one side of the frame, an x-axis moving mechanism arranged on one side of the movable end of the z-axis moving mechanism, and a y-axis moving mechanism arranged on one side of the movable end of the x-axis moving mechanism. The pushing frame is fixed on one side of the movable end of the z-axis moving mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0015] Figure 1 is a schematic structural diagram of a battery cell welding device in an embodiment of the present utility model;

[0016] Figure 2 is Figure 1 an enlarged view of part A in

[0017] Figure 3 is a schematic structural diagram of a bus bar in an embodiment of the present utility model;

[0018] Figure 4 is a partial schematic structural diagram of a pressing mechanism in an embodiment of the present utility model;

[0019] Description of the symbols of the main components in the figure:

[0020] Frame 11, conveyor belt 12, three-dimensional mobile robot 20, z-axis moving mechanism 21, x-axis moving mechanism 22, y-axis moving mechanism 23, laser welder 24, fixing bracket 31, slide rail 32, slider 33, pressing bracket 34, pressing column 35, fixing part 35a, abutting part 35b, adjusting block 36, fastener 37, fixing block 38, telescopic column 39, pushing bracket 41, bus bar 50, main body part 51, fin part 52, second fin part 52a, first fin part 52b, bending part 53, bracket 60. Detailed implementation manners

[0021] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. Multiple embodiments of the present utility model are shown in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present utility model will be thorough and comprehensive.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0024] Please refer to Figures 1 to 4, shown is a battery cell welding device in an embodiment of the present utility model, including a plurality of battery cells, and brackets 60 fixed on each of the battery cells. Assembly grooves corresponding to the pole columns of the battery cells are provided on the brackets 60, and busbars 50 corresponding to the pole columns are arranged in the assembly grooves. The battery cell welding device further includes a laser welding assembly arranged on the upper side of the battery cells, and a pressing mechanism corresponding to the busbars 50. The pressing mechanism includes a fixed frame 31 arranged on one side of the battery cells, and a pressing frame 34 slidably arranged on the fixed frame 31. A first elastic member is arranged between the pressing frame 34 and the fixed frame 31. A plurality of pressing columns 35 corresponding to the busbars 50 are arranged on the pressing frame 34. The laser welding assembly includes a three-dimensional moving robot 20, and a laser welder 24 arranged on one side of the three-dimensional moving robot 20. A pushing frame 41 corresponding to the pressing frame 34 is further arranged on the three-dimensional moving robot 20.

[0025] In some application scenarios of this embodiment, when the laser welder 24 moves to the target position and then moves downward for welding operations, it drives the pressing columns 35 to press the busbars 50, reducing the probability of virtual soldering of the busbars 50, ensuring stable welding at the same time, and improving the welding quality.

[0026] Specifically, in this embodiment, the above-mentioned busbar 50 includes a main body portion 51, wing portions 52 arranged on both sides of the main body portion 51, and bending portions 53 arranged between the wing portions 52 and the main body portion 51. The above-mentioned pressing column 35 includes a fixing portion 35a fixed on the fixed frame 31, and an abutting portion 35b slidably arranged on one side of the fixing portion 35a. A second elastic member is arranged between the fixing portion 35a and the abutting portion 35b. Preferably, the above-mentioned second elastic member is a spring. When welding operations are carried out, as the laser welder 24 presses down, the pushing frame 41 drives the pressing frame 34 to press down. The pressing frame 34 drives the pressing columns 35 to fit the busbars 50. At this time, the above-mentioned spring is compressed. After the welding operations are completed, as the pushing frame 41 rises, the pressing frame 34 and the pressing columns 35 are reset based on the second elastic member, driving the abutting portion 35b to move away from the busbar 50 side, and the spring is reset.

[0027] By arranging the above-mentioned second elastic member on the pressing column 35, and at the same time, the wing portion 52 of the busbar 50 can be bent and deformed relative to the main body portion 51 based on the bending portion 53. When the pressing block drives a plurality of pressing columns 35 to press down, each pressing column 35 can fit the busbar 50 for pressing operations, making the wing portion 52 tend to move closer to the pole column side, reducing the influence of the height difference of each battery cell body.

[0028] Preferably, in this embodiment, the pressing mechanism further includes an adjusting block 36 movably arranged on the pressing frame 34. A fastener 37 is detachably arranged between the adjusting block 36 and the pressing frame 34, and the pressing column 35 is fixed to the adjusting block 36. It can be understood that in some application scenarios of this embodiment, by removing the fastener 37, the relative position between the adjusting block 36 and the fixed frame 31 can be adjusted to meet the requirements of different size specifications of the battery cells. It can be understood that the length dimension of the adjusting block 36 can be set arbitrarily according to requirements. Preferably, the fastener 37 is a bolt, and the pressing column 35 is fixed by abutting the bolt against the pressing frame 34.

[0029] Further, in this embodiment, the fin portion 52 includes a first fin portion 52b located in the middle of the bus bar 50, and second fin portions 52a arranged on both sides of the first fin portion 52b. The second fin portions 52a are arranged corresponding to the pole columns, and the pressing column 35 is arranged close to the first fin portion 52b. Specifically, in this embodiment, each bus bar 50 corresponds to four welding points, which are located at the four corners of the bus bar 50, that is, at the second fin portions 52a, and the pressing column 35 is arranged at the first fin portion 52b, that is, in the middle of the bus bar 50, so as to avoid the laser welder 24 from performing welding operations.

[0030] Specifically, in this embodiment, a slide rail 32 is fixed on the fixed frame 31. A slider 33 is arranged on the slide rail 32, and the pressing frame 34 is fixed to one side of the slider 33. A fixed block 38 is also arranged on the fixed frame 31. A telescopic column 39 is arranged between the fixed block 38 and the slider 33. The first elastic member includes a return spring arranged in the telescopic column 39. By arranging the return spring, when the laser welder 24 completes welding and resets, the pressing frame 34 can be automatically reset and move away from the battery cell side, so as to facilitate the movement operation of the battery cell after welding.

[0031] Specifically, in this embodiment, the battery cell welding device further includes a conveying mechanism for driving the movement of the battery cell. The conveying mechanism includes a frame 11 and a conveyor belt 12 arranged in the middle of the frame 11, and the fixed frame 31 is fixed to the frame 11.

[0032] In some application scenarios of this embodiment, when the laser welder 24 completes the welding operations of the battery cells of a single battery module, the conveyor belt is driven to drive the next battery module to be welded and move to one side of the pressing mechanism, so as to efficiently realize the batch welding of multiple battery cells.

[0033] Preferably, in the present embodiment, the three-dimensional mobile robot 20 includes a z-axis moving mechanism 21 fixed to one side of the frame 11, an x-axis moving mechanism 22 provided on one side of the movable end of the z-axis moving mechanism 21, and a y-axis moving mechanism 23 provided on one side of the movable end of the x-axis moving mechanism 22. The pushing frame 41 is fixed to one side of the movable end of the z-axis moving mechanism 21. By arranging the pushing frame 41 on one side of the movable end of the z-axis moving mechanism 21, the pressing frame 34 can move along with the progress of the welding operation, that is, the busbar 50 is pressed before welding, and the pressing column 35 is separated from the busbar 50 after welding, which maximally reduces the influence of the pressing mechanism on the welding operation and improves the welding efficiency and quality.

[0034] In summary, for the battery cell welding device in the above embodiment of the present invention, a fixing frame 31 is provided on one side of the battery cell, a pressing frame 34 is slidably arranged on the fixing frame 31, several pressing columns 35 are arranged on the pressing frame 34, and a pushing frame 41 corresponding to the pressing frame 34 is arranged on one side of the three-dimensional mobile robot 20 of the laser welding assembly. When the laser welder 24 moves to the target position and then moves downward for welding operation, it drives the pressing column 35 to press the busbar 50, reducing the probability of false soldering of the busbar 50, ensuring stable welding at the same time, and improving the welding quality.

[0035] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0036] The above embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, various modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. A battery cell welding device, characterized in that, It includes a plurality of battery cells, and brackets fixed to each of the battery cells. Assembly grooves corresponding to the pole columns of the battery cells are formed on the brackets. A bus bar corresponding to the pole column is arranged in the assembly groove. The battery cell welding device further includes a laser welding assembly arranged on the upper side of the battery cell, and a pressing mechanism corresponding to the bus bar. The pressing mechanism includes a fixed frame arranged on one side of the battery cell, and a pressing frame slidably arranged on the fixed frame. A first elastic member is arranged between the pressing frame and the fixed frame. A plurality of pressing columns corresponding to the bus bar are arranged on the pressing frame. The laser welding assembly includes a three-dimensional moving robot, and a laser welder arranged on one side of the three-dimensional moving robot. A pushing frame corresponding to the pressing frame is further arranged on the three-dimensional moving robot.

2. The battery cell welding device according to claim 1, wherein The pressing column includes a fixed part fixed to the fixed frame, and an abutting part slidably arranged on one side of the fixed part. A second elastic member is arranged between the fixed part and the abutting part.

3. The cell welding device according to claim 1, characterized in that, The pressing mechanism further includes an adjusting block movably arranged on the pressing frame. A fastening member is detachably arranged between the adjusting block and the pressing frame. The pressing column is fixed to the adjusting block.

4. The cell welding device according to claim 1, wherein The bus bar includes a main body part, wing parts arranged on both sides of the main body part, and bending parts arranged between the wing parts and the main body part.

5. The battery cell welding device according to claim 4, wherein, The wing part includes a first wing part located in the middle of the bus bar, and second wing parts arranged on both sides of the first wing part. The second wing parts are arranged corresponding to the pole columns. The pressing column is arranged close to the first wing part.

6. The cell welding device according to claim 1, characterized in that, A slide rail is fixed to the fixed frame. A slider is arranged on the slide rail. The pressing frame is fixed to one side of the slider. A fixed block is further arranged on the fixed frame. A telescopic column is arranged between the fixed block and the slider. The first elastic member includes a return spring arranged in the telescopic column.

7. The battery cell welding device according to claim 1, wherein, The battery cell welding device further includes a conveying mechanism for driving the movement of the battery cell. The conveying mechanism includes a frame, and a conveyor belt arranged in the middle of the frame. The fixed frame is fixed to the frame.

8. The cell welding device according to claim 7, wherein The three-dimensional moving robot includes a z-axis moving mechanism fixed to one side of the frame, an x-axis moving mechanism arranged on one side of the movable end of the z-axis moving mechanism, and a y-axis moving mechanism arranged on one side of the movable end of the x-axis moving mechanism. The pushing frame is fixed to one side of the movable end of the z-axis moving mechanism.

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