Welding device for assembling lithium battery pack

Abstract

The utility model relates to the technical field of lithium battery production, in particular to a welding device for assembling a lithium battery pack, which comprises a workbench, a mounting frame and a controller, a tray is arranged on the workbench, a bending mechanism is arranged at one end of the top of the mounting frame, and a soldering mechanism is arranged at the other end of the top of the mounting frame. The tin soldering mechanism comprises a tin soldering three-axis module, a welding frame and a welding pen, the welding frame is provided with a smoke suction mechanism, the smoke suction mechanism comprises a smoke collecting pipe and a smoke collecting fan, the end of the smoke collecting pipe is further connected with a smoke purifier, and the tin soldering three-axis module, the welding pen and the smoke collecting fan are all electrically connected with the controller. The problems that a large amount of welding smoke dust is generated during manual electric welding of a traditional copper pole piece, the smoke dust is diffused and is easily inhaled into the body of a worker, the body of the worker is damaged, and potential safety hazards exist are solved.

Description

Technical Field

[0001] This application relates to the technical field of lithium battery production, and specifically discloses a welding device for assembling lithium battery packs. Background Art

[0002] A lithium battery pack is assembled from multiple battery groups, mainly including components such as a battery module, a mechanism system, an electrical system, a thermal management system, and a battery management system, and is widely used in large and medium-sized electric devices such as electric vehicles and electric bicycles. In the assembly process of a lithium battery pack, the battery module is assembled by monomer battery cells and uses a bus bar to form different series and parallel connections among the battery cells. The connection between the battery cells usually adopts the processing method of manual soldering to fixedly connect the copper pole pieces between the electrodes of the battery cells.

[0003] Due to the series and parallel connections between different battery cells, before welding the copper pole pieces to the electrodes of each battery cell by electric soldering, it is necessary to temporarily fix and place the top of the lithium battery pack and bend the copper pole pieces, and then connect the bent copper pole pieces between the electrodes of the battery cells and fix them in shape by soldering. However, a large amount of welding fumes will be generated during the welding process of the copper pole pieces of the existing lithium battery packs, and the diffusion of the fumes is easily inhaled by the welding workers or even the workers at other workstations in the production site, which is extremely likely to cause damage to the workers' bodies and pose a safety hazard. Therefore, in view of this, the inventor provides a welding device for assembling lithium battery packs to solve the above problems. Summary of the Utility Model

[0004] The purpose of the present utility model is to solve the problem that a large amount of welding fumes will be generated during the manual electric soldering of traditional copper pole pieces, and the diffusion of the fumes is easily inhaled by the workers, causing damage to the workers' bodies and posing a safety hazard.

[0005] To achieve the above purpose, the basic solution of the present utility model provides a welding device for assembling lithium battery packs, including a workbench, a mounting frame provided on the workbench, and a controller. A tray for placing and fixing the lithium battery pack is provided on the workbench. One end of the top of the mounting frame is provided with a bending mechanism for bending the copper pole pieces on the top of the lithium battery pack, and the other end of the top of the mounting frame is provided with a soldering mechanism for soldering the bent copper pole pieces. The soldering mechanism includes a soldering three-axis module mounted on the mounting frame, a welding frame provided at the end of the soldering three-axis module, and a soldering pen provided at the end of the welding frame and capable of soldering the bent copper pole pieces. A smoking mechanism is provided on the welding frame. The smoking mechanism includes a smoke collecting pipe detachably mounted on one side of the welding frame and a smoke collecting fan provided at the end of the smoke collecting pipe for sucking the soldering fumes into the smoke collecting pipe. A flue gas purifier is also connected to the end of the smoke collecting pipe. The soldering three-axis module, the soldering pen, and the smoke collecting fan are all electrically connected to the controller.

[0006] The principle and effect of this basic solution are as follows:

[0007] 1. By setting up a bending mechanism and a soldering mechanism, the present utility model enables two workstations for bending and soldering to be set on the workbench, making the assembly production of lithium battery packs more coherent and orderly, and improving the efficiency of lithium battery pack assembly.

[0008] 2. Compared with the prior art, the present utility model uses a soldering three-axis module, a welding frame and a soldering pen, which is convenient for soldering the bent copper pole pieces. By setting a smoke collecting pipe and a smoke collecting fan on the welding frame, it is convenient to gather the welding fumes around the soldering pen. At the same time, by setting a smoke collecting pipe to connect to a flue gas purifying machine, it is convenient to purify the welding fumes gathered through the smoke collecting pipe, thereby facilitating the circulation and ventilation of the gas inside the smoke collecting pipe, avoiding the direct discharge of welding fumes and causing harm to the workers' bodies, thus ensuring the working environment of the lithium battery pack production workers, and solving the problem that a large amount of welding fumes are generated during manual electric welding of traditional copper pole pieces, and the diffusion of the fumes is easily inhaled by the workers, causing harm to the workers' bodies and posing a safety hazard.

[0009] Further, the bending mechanism includes a bending three-axis module installed on the mounting frame, a pressing plate provided at the end of the bending three-axis module, and a pressing wheel rotatably connected to the bottom of one side of the pressing plate and used to press the copper pole piece for bending. The bending three-axis module is electrically connected to the controller. By setting the bending three-axis module to drive the pressing plate and the pressing wheel to move and adjust, the adjustment of the bending working position is realized, and the copper pole piece is pressed by the pressing wheel, so as to achieve the purpose of bending the copper pole piece for facilitating the connection of the battery cell electrodes.

[0010] Further, the soldering three-axis module includes a first horizontal guide rail horizontally slidably connected to one end of one side of the mounting frame, a first vertical guide rail slidable horizontally on the first horizontal guide rail, a first vertical guide rail slidable vertically on the first vertical guide rail, and a first slide table slidable vertically on the first vertical guide rail. The welding frame is detachably connected to the first slide table. A first horizontal driving member for driving the first vertical guide rail to slide horizontally is provided at the end of the first horizontal guide rail, a first vertical driving member for driving the first vertical guide rail to slide vertically is provided at the end of the first vertical guide rail, and a first vertical driving member for driving the first slide table to slide vertically is provided at the end of the first vertical guide rail. The first horizontal driving member, the first vertical driving member and the first vertical driving member are all electrically connected to the controller. By setting the first horizontal driving member, the first vertical driving member and the first vertical driving member to drive the first vertical guide rail, the first vertical guide rail and the first slide table to slide respectively, and then driving the position change of the welding frame and the soldering pen at the bottom end of the soldering three-axis module, and then realizing the soldering of the copper pole piece by changing the displacement of the soldering pen at the top of the lithium battery pack, the control is convenient and the working efficiency is high.

[0011] Furthermore, the bending three-axis module includes a second transverse guide rail that is horizontally slidably connected to the other end of one side of the mounting frame, a second longitudinal guide rail that can slide horizontally on the second transverse guide rail, a second vertical guide rail that can slide longitudinally on the second longitudinal guide rail, and a second sliding table that can slide vertically on the second vertical guide rail. The pressing plate is detachably connected to the second sliding table. A second transverse driving member for driving the second longitudinal guide rail to slide horizontally is provided at the end of the second transverse guide rail. A second longitudinal driving member for driving the second vertical guide rail to slide longitudinally is provided at the end of the second longitudinal guide rail. A second vertical driving member for driving the second sliding table to slide vertically is provided at the end of the second vertical guide rail. The second transverse driving member, the second longitudinal driving member, and the second vertical driving member are all electrically connected to the controller. By setting the second transverse driving member, the second longitudinal driving member, and the second vertical driving member to drive the second longitudinal guide rail, the second vertical guide rail, and the second sliding table to slide respectively, the position of the pressing plate and the pressing wheel at the bottom end of the bending three-axis module is changed, and then the pressing wheel changes its displacement at the top of the lithium battery pack to press and bend the copper pole piece.

[0012] Furthermore, the smoke collecting pipe is detachably installed on one side of the welding frame. One end of the smoke collecting pipe is adjacent to the soldering pen, and the other end of the smoke collecting pipe is detachably connected to the first sliding table and connected to the fume purifier. The smoke collecting fan is detachably installed on the first sliding table. By setting the two ends of the smoke collecting pipe to be connected between the soldering pen and the smoke collecting fan for ventilation, it is convenient to centrally absorb the welding fumes. At the same time, a fume purifier is arranged at the end of the smoke collecting pipe to purify the welding fumes flowing through the smoke collecting pipe, which is convenient for the treatment of welding fumes, avoids the diffusion of welding fumes and polluting the production site environment, and further avoids damaging the bodies of production workers.

[0013] Furthermore, a balance slide rail is provided at the end of the mounting frame away from the first transverse guide rail and the second transverse guide rail. The other ends of the first transverse guide rail and the second transverse guide rail are both slidably connected to the balance slide rail. By setting the balance slide rail, it is more convenient for the first transverse guide rail and the second transverse guide rail to slide and adjust on the mounting frame, and at the same time, the structural stability of the first transverse guide rail and the second transverse guide rail is improved, thereby improving the production and processing quality of bending and welding of lithium battery packs.

[0014] Furthermore, the tray includes a bending support table that is slidably connected to the workbench and is used to place the lithium battery pack to be bent, and a soldering support table that is slidably connected to the workbench and is used to place the lithium battery pack to be soldered after bending. The bending support table is located below the bending three-axis module, and the soldering support table is located below the soldering three-axis module. The first transverse guide rail and the second transverse guide rail are symmetrically arranged on both sides of the mounting frame. Limit frames for fixing the lithium battery pack are provided on both the bending support table and the soldering support table. By respectively setting the bending support table and the soldering support table, it is convenient to carry out production work at the two stations of bending and soldering simultaneously, making the production process more coherent and orderly, thereby improving the production efficiency. Brief Description of the Drawings

[0015] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 The structural perspective view showing the overall structure of a welding device for assembling a lithium battery pack proposed in an embodiment of the present application;

[0017] Figure 2 The structural perspective view showing the bending mechanism of a welding device for assembling a lithium battery pack proposed in an embodiment of the present application;

[0018] Figure 3 The structural perspective view showing the soldering mechanism of a welding device for assembling a lithium battery pack proposed in an embodiment of the present application. Detailed Embodiments

[0019] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following will, in conjunction with the drawings and preferred embodiments, describe in detail the specific embodiments, structures, features, and their effects of the present invention as follows.

[0020] The reference numerals in the drawings of the specification include: workbench 1, mounting frame 2, lithium battery pack 3, welding frame 4, soldering pen 5, smoke collecting pipe 6, pressing plate 7, pressing wheel 8, first horizontal guide rail 9, first vertical guide rail 10, first vertical guide rail 11, first sliding table 12, first horizontal driving member 13, first vertical driving member 14, first vertical driving member 15, second horizontal guide rail 16, second vertical guide rail 17, second vertical guide rail 18, second sliding table 19, second horizontal driving member 20, second vertical driving member 21, balance slide rail 22, bending support table 23, soldering support table 24, limiting frame 25.

[0021] A welding device for assembling a lithium battery pack, as shown in the embodiments Figure 1 includes: a workbench 1, a mounting frame 2 provided on the workbench 1, and a controller. The controller includes, but is not limited to, a PLC controller. A tray for placing and fixing the lithium battery pack 3 is provided on the workbench 1. One end of the top of the mounting frame 2 is provided with a bending mechanism for bending the copper electrode plate on the top of the lithium battery pack 3, and the other end of the top of the mounting frame 2 is provided with a soldering mechanism for soldering the bent copper electrode plate, as Figure 3As shown in the figure, the soldering mechanism includes a soldering three-axis module installed on the mounting frame 2, a soldering frame 4 provided at the end of the soldering three-axis module, and a soldering pen 5 provided at the end of the soldering frame 4 and capable of soldering the folded copper pole piece. The soldering frame 4 is provided with a smoking mechanism. The smoking mechanism includes a smoke collecting pipe 6 detachably installed on one side of the soldering frame 4 and a smoke collecting fan provided at the end of the smoke collecting pipe 6 for sucking the soldering fumes into the smoke collecting pipe 6. The end of the smoke collecting pipe 6 is also connected to a flue gas purifier. The soldering three-axis module, the soldering pen 5, and the smoke collecting fan are all electrically connected to the controller.

[0022] Among them, as Figure 2 shown, the bending mechanism includes a bending three-axis module installed on the mounting frame 2, a pressing plate 7 provided at the end of the bending three-axis module, and a pressing wheel 8 rotatably connected to the bottom of one side of the pressing plate 7 and used to press the copper pole piece for bending. The bending three-axis module is electrically connected to the controller.

[0023] Among them, as Figure 1 and Figure 3 shown, the soldering three-axis module includes a first horizontal guide rail 9 horizontally slidably connected to one end of one side of the mounting frame 2, a first longitudinal guide rail 10 slidable horizontally on the first horizontal guide rail 9, a first vertical guide rail 11 slidable longitudinally on the first longitudinal guide rail 10, and a first sliding table 12 slidable vertically on the first vertical guide rail 11. The soldering frame 4 is detachably connected to the first sliding table 12. The end of the first horizontal guide rail 9 is provided with a first horizontal driving member 13 for driving the first longitudinal guide rail 10 to slide horizontally. The end of the first longitudinal guide rail 10 is provided with a first longitudinal driving member 14 for driving the first vertical guide rail 11 to slide longitudinally. The end of the first vertical guide rail 11 is provided with a first vertical driving member 15 for driving the first sliding table 12 to slide vertically. The first horizontal driving member 13, the first longitudinal driving member 14, and the first vertical driving member 15 are all electrically connected to the controller.

[0024] Among them, as Figure 1 and Figure 2 shown, the bending three-axis module includes a second horizontal guide rail 16 horizontally slidably connected to the other end of one side of the mounting frame 2, a second longitudinal guide rail 17 slidable horizontally on the second horizontal guide rail 16, a second vertical guide rail 18 slidable longitudinally on the second longitudinal guide rail 17, and a second sliding table 19 slidable vertically on the second vertical guide rail 18. The pressing plate 7 is detachably connected to the second sliding table 19. The end of the second horizontal guide rail 16 is provided with a second horizontal driving member 20 for driving the second longitudinal guide rail 17 to slide horizontally. The end of the second longitudinal guide rail 17 is provided with a second longitudinal driving member for driving the second vertical guide rail 18 to slide longitudinally. The end of the second vertical guide rail 18 is provided with a second vertical driving member 21 for driving the second sliding table 19 to slide vertically. The second horizontal driving member 20, the second longitudinal driving member, and the second vertical driving member 21 are all electrically connected to the controller.

[0025] Among them, as Figure 3 shown, the smoke collecting pipe 6 is detachably installed on one side of the welding rack 4. One end of the smoke collecting pipe 6 is adjacent to the soldering pen 5, and the other end of the smoke collecting pipe 6 is detachably connected to the first sliding table 12 and connected to the flue gas purifier. The flue gas purifier is a commonly used existing flue gas purifier structure, and the smoke collecting fan is detachably installed on the back of the first sliding table 12.

[0026] Among them, as Figure 1 shown, a balance slide rail 22 is provided at one end of the mounting frame 2 away from the first horizontal guide rail 9 and the second horizontal guide rail 16, and the other ends of the first horizontal guide rail 9 and the second horizontal guide rail 16 are both slidably connected to the balance slide rail 22.

[0027] Among them, as Figure 1 shown, the tray includes a bending support platform 23 slidably connected to the workbench 1 and used for placing the lithium battery pack 3 to be bent, and a soldering support platform 24 slidably connected to the workbench 1 and used for placing the lithium battery pack 3 to be soldered after bending. The bending support platform 23 is located below the bending three-axis module, and the soldering support platform 24 is located below the soldering three-axis module. The first horizontal guide rail 9 and the second horizontal guide rail 16 are symmetrically arranged on both sides of the mounting frame 2. A plurality of limit frames 25 for fixing the bottom of the lithium battery pack 3 are provided on both the bending support platform 23 and the soldering support platform 24. The actual function of the tray can be switched between the bending support platform 23 and the soldering support platform 24 as the process progresses.

[0028] In the specific implementation process of the present utility model, first, the controller controls the bending mechanism to perform bending treatment on the lithium battery pack 3 on the bending support platform 23. The controller directly controls the second horizontal driving member 20, the second longitudinal driving member, and the second vertical driving member 21 to drive the second longitudinal guide rail 17, the second vertical guide rail 18, and the second sliding table 19 to adjust their positions respectively until the pressing plate 7 and the pressing wheel 8 move to directly above the copper pole piece at the top of the lithium battery pack 3. Then, the controller adjusts the second vertical driving member 21 to drive the second sliding table 19 to move downward, so that the pressing wheel 8 moves downward and bends the copper pole piece. After the lithium battery pack 3 is bent, the bending support platform 23 and the bent lithium battery pack 3 installed on the bending support platform 23 are slid to below the welding mechanism. At this time, the function of the bending support platform 23 is converted into the soldering support platform 24 as the process progresses, and a bending support platform 23 located below the bending mechanism is slid and placed on the workbench 1 again, and a lithium battery pack 3 that needs to be bent is installed on this bending support platform 23 at the same time.

[0029] Subsequently, the lithium battery pack 3 after the bending process on the previous solder support table 24 is subjected to soldering. The controller controls the first lateral driving member 13, the first longitudinal driving member 14, and the first vertical driving member 15 to drive the first longitudinal guide rail 10, the first vertical guide rail 11, and the first sliding table 12 to adjust their positions respectively until the welding frame 4 and the soldering pen 5 move directly above the copper pole piece at the top of the lithium battery pack 3. Then, the controller adjusts the first vertical driving member 15 to drive the first sliding table 12 to move downward, thereby driving the soldering pen 5 to solder the copper pole piece below the soldering mechanism. During this process, the controller controls the smoke collection fan to start, driving the air circulation in the smoke collection pipe 6, sucking the soldering fumes from the bottom of the smoke collection pipe 6, and discharging them from the end of the smoke collection pipe 6 away from the soldering pen 5 through the flue gas purifier. The flue gas purifier purifies the impurities in the flowing soldering fumes, so that the gas discharged from the smoke collection pipe 6 is purified, thus avoiding the external discharge of soldering fumes. After the soldering of the copper pole piece is completed, the lithium battery pack 3 is removed, and the bending and welding work is completed.

[0030] Compared with the prior art, the present utility model, by providing a bending mechanism and a soldering mechanism, enables two working stations for bending and soldering to be arranged on the workbench 1 simultaneously, making the assembly production of the lithium battery pack 3 more coherent and orderly, and improving the assembly efficiency of the lithium battery pack 3. By adopting a soldering three-axis module, a welding frame 4, and a soldering pen 5, it is convenient to perform soldering on the bent copper pole piece. By providing a smoke collection pipe 6 and a smoke collection fan on the welding frame 4, it is convenient to gather the welding fumes around the soldering pen 5. At the same time, by connecting the smoke collection pipe 6 to the flue gas purifier, it is convenient to purify the welding fumes gathered and passing through the smoke collection pipe 6, thereby facilitating the circulation and ventilation of the gas inside the smoke collection pipe 6 and avoiding the direct external discharge of welding fumes, which may cause harm to the workers' bodies, thus ensuring the working environment of the production workers of the lithium battery pack 3 and solving the problem that a large amount of welding fumes are generated during the manual electric welding of traditional copper pole pieces, and the fumes are easily inhaled by workers, causing harm to the workers' bodies and posing a safety hazard.

[0031] The above is only a preferred embodiment of the present utility model and does not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with the preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to obtain equivalent embodiments with equivalent changes within the scope of the technical solution of the present utility model. However, as long as it does not depart from the content of the technical solution of the present utility model, any brief modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A welding device for lithium battery pack assembly, characterized in that: It includes a workbench, a mounting frame arranged on the workbench, and a controller. The workbench is provided with a tray for placing and fixing a lithium battery pack. A bending mechanism for bending the copper electrode piece on the top of the lithium battery pack is provided at one end of the top of the mounting frame. A soldering mechanism for welding the bent copper electrode piece is provided at the other end of the top of the mounting frame. The soldering mechanism includes a soldering three-axis module installed on the mounting frame, a welding frame arranged at the end of the soldering three-axis module, and a soldering pen arranged at the end of the welding frame and capable of soldering the bent copper electrode piece. The welding frame is provided with a smoking mechanism. The smoking mechanism includes a smoke collecting pipe detachably installed on one side of the welding frame and a smoke collecting fan arranged at the end of the smoke collecting pipe and used for sucking solder smoke into the smoke collecting pipe. The end of the smoke collecting pipe is also connected to a smoke purifier. The soldering three-axis module, the soldering pen and the smoke collecting fan are all electrically connected to the controller.

2. A lithium battery pack assembly welding device according to claim 1, characterized in that: The bending mechanism includes a bending three-axis module installed on a mounting frame, a pressure plate arranged at the end of the bending three-axis module, and a pressure wheel rotatably connected to the bottom of one side of the pressure plate and used to apply pressure to the copper pole piece for bending. The bending three-axis module is electrically connected to the controller.

3. A lithium battery pack assembly welding device according to claim 2, characterized in that: The soldering three-axis module includes a first transverse guide rail connected to one end of one side of the mounting frame for transverse sliding, a first longitudinal guide rail capable of transversely sliding on the first transverse guide rail, a first vertical guide rail capable of longitudinally sliding on the first longitudinal guide rail, and a first slide capable of vertically sliding on the first vertical guide rail. The welding frame is detachably connected to the first slide. A first transverse driving member for driving the first longitudinal guide rail to slide transversely is provided at the end thereof, a first longitudinal driving member for driving the first vertical guide rail to slide longitudinally is provided at the end thereof, a first vertical driving member for driving the first slide to slide vertically is provided at the end thereof, and the first transverse driving member, the first longitudinal driving member and the first vertical driving member are electrically connected to a uniform controller.

4. A lithium battery pack assembly welding device according to claim 3, characterized in that: The bending three-axis module includes a second transverse guide rail connected to the other end of one side of the mounting frame for transverse sliding, a second longitudinal guide rail that can slide transversely on the second transverse guide rail, a second vertical guide rail that can slide longitudinally on the second longitudinal guide rail, and a second slide that can slide vertically on the second vertical guide rail. The pressure plate is detachably connected to the second slide. The end of the second transverse guide rail is provided with a second transverse driving member for driving the second longitudinal guide rail to slide transversely, the end of the second longitudinal guide rail is provided with a second longitudinal driving member for driving the second vertical guide rail to slide longitudinally, and the end of the second vertical guide rail is provided with a second vertical driving member for driving the second slide to slide vertically. The second transverse driving member, the second longitudinal driving member and the second vertical driving member are all electrically connected to the controller.

5. A lithium battery pack assembly welding device according to claim 4, characterized in that: The smoke collecting pipe is detachably mounted on one side of the welding frame, one end of the smoke collecting pipe is adjacent to the welding pen, the other end of the smoke collecting pipe is detachably connected to the first slide and connected to the smoke purifier, and the smoke collecting fan is detachably mounted on the first slide.

6. A lithium battery pack assembly welding device according to claim 5, characterized in that: A balancing rail is disposed at one end of the mounting frame away from the first transverse guide rail and the second transverse guide rail, and the other ends of the first transverse guide rail and the second transverse guide rail are both slidably connected to the balancing rail.

7. A lithium battery pack assembly welding device according to claim 6, characterized in that: The tray includes a bending support table slidably connected to the workbench and used to place the lithium battery pack to be bent, and a soldering support table slidably connected to the workbench and used to place the lithium battery pack to be soldered after bending. The bending support table is located below the bending three-axis module, and the soldering support table is located below the soldering three-axis module. The first transverse guide rail and the second transverse guide rail are symmetrically arranged on both sides of the mounting frame. The bending support table and the soldering support table are both provided with a limit frame for fixing the lithium battery pack.

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