A flip-over battery pack welding device

Abstract

The utility model relates to a kind of turnover type battery pack welding device, including transport part, turnover part and welding part, the turnover part and welding part are all set in the top of transport part, the welding part is symmetrically set in the front and back of turnover part, the welding part includes welding head, rotating device and displacement device, the displacement device is set in the top of transport part, the rotating device is installed in the mobile end of displacement device, the welding head is fixedly installed in the rotating end of rotating device, the turnover part includes rotating jaw, first propulsion device and second propulsion device, the second propulsion device is set in the top of transport part, the first propulsion device is installed in the working end of second propulsion device, the rotating jaw is installed in the working end of first propulsion device. Its compact structure, layout is reasonable, through the automation operation of conveying, positioning, welding and turnover cooperation etc. process, replace traditional manual positioning and welding operation, significantly reduce the labor intensity of worker.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pack welding device technical field especially relates to a turnover type battery pack welding device. BACKGROUND

[0002] With the rapid development of electric vehicles, portable electronic equipment and other industries, the demand for high efficiency, high safety batteries is increasing. As one of the key components of these devices, the production efficiency and quality of the battery pack are directly related to the performance of the final product.

[0003] The battery pack is usually composed of multiple battery cells. In order to realize the electrical connection between the battery cells, nickel sheets need to be welded to the electrodes of the battery cells. Currently, the traditional welding method has many drawbacks. On the one hand, it relies heavily on manual operation, and workers need to manually position and weld the nickel sheets with the battery cells, which not only requires a lot of labor, but also makes it difficult to ensure consistency in welding quality due to human factors, and virtual welding and missed welding often occur. On the other hand, the welding device used has poor flexibility and is difficult to adapt to the welding needs of battery cells and nickel sheets of different specifications and different arrangements. SUMMARY

[0004] The technical problem to be solved by the utility model is to provide a turnover type battery pack welding device, which has a compact structure and a reasonable layout. Through the automation of processes such as conveying, positioning, welding and turning, the traditional manual positioning and welding operation is replaced, significantly reducing the labor intensity of workers.

[0005] To solve the above technical problems, the technical solution provided by the utility model is as follows:

[0006] A turnover type battery pack welding device, comprising a conveying part, a turning part and a welding part, the turning part and the welding part are arranged above the conveying part, the welding part is symmetrically arranged on the front and rear sides of the turning part, the welding part comprises a welding head, a rotating device and a displacement device, the displacement device is arranged above the conveying part, the rotating device is installed on the moving end of the displacement device, the welding head is fixedly installed on the rotating end of the rotating device, the turning part comprises a rotating claw, a first advancing device and a second advancing device, the second advancing device is arranged above the conveying part, the first advancing device is installed on the working end of the second advancing device, the rotating claw is installed on the working end of the first advancing device, and the rotating claw can move up and down and front and back under the drive of the first advancing device and the second advancing device. Among them, the conveying part can be a conveying belt commonly seen on the market, two conveying belts are arranged at intervals and form a space between them for the movement of the positioning device.

[0007] Due to the difference in customer demand, the slot direction on the nickel sheet is different, which requires adjusting the orientation of the battery pack during welding. The battery pack is usually placed in the tooling, and the direction needs to be rotated as a whole. This undoubtedly expands the equipment occupation space, causing space waste in layout.

[0008] The working principle of the scheme is: the tooling with the battery pack is placed at the starting end of the transportation part, and then the tooling is first transported to the welding part for welding connection of the nickel sheet and the electrode on the battery cell. The rotating device provided on the welding part drives the welding head to rotate around the predetermined axis, so that it can adapt to the different slot structures on the nickel sheet, thereby completing the welding connection of the nickel sheet and the electrode on the battery cell. After welding, the tooling is transported to the turnover part, and then the rotating claw of the turnover part clamps the tooling and lifts it as a whole and rotates 180° around the horizontal shaft to realize the automatic turning of the battery pack, and then the tooling is placed back in the transportation part. Finally, the tooling enters the welding part again to complete the welding connection of the nickel sheet and the lower electrode of the battery cell.

[0009] In this application, the rotatable welding head effectively replaces the traditional method of rotating the tooling in a large range, significantly reducing the equipment motion envelope space, reducing the demand for the production line rotation area, facilitating compact layout, improving space utilization, and reducing waste of site resources. It is worth mentioning that the rotating tooling needs to be equipped with a larger power driving device, which will increase the energy consumption and part wear of the equipment during long-term use, while the rotating welding head only needs a small and precise rotating shaft, which has compact structure and high reliability. In addition, the turnover part clamps the tooling with the rotating claw and lifts it as a whole, and then rotates 180° around the horizontal shaft, which can ensure that the tooling and the internal battery pack are stable and do not shake during the turnover process, and can accurately complete the turnover action.

[0010] It should be noted that the welding head is connected with the welding machine, and the welding machine is provided on one side of the transportation part. The welding head and the welding machine are common products on the market, so they will not be described again. The rotating claw can be a common electric rotating clamp, and the rotating device can be a common servo motor, so they will not be described again.

[0011] Preferably, a positioning device is further included, the positioning device is provided with a plurality of positioning devices, the plurality of positioning devices are arranged below the conveying part, the plurality of positioning devices correspond to the turnover part and the welding part one by one, the positioning device comprises a third propulsion device and a top plate, the third propulsion device is arranged below the conveying part, the top plate is fixedly installed at the working end of the third propulsion device, the top plate can move up and down under the drive of the third propulsion device, and a positioning pin is fixedly arranged on the top plate. In this way, when the battery pack tooling is conveyed to the positioning device by the conveying part, the top plate will lift the tooling, and at the same time, the positioning pin will be inserted into the corresponding matching hole of the tooling to realize accurate positioning of the tooling in the horizontal direction. This structure effectively avoids the deviation of the tooling caused by inertia or mechanical clearance during transportation, ensures the accurate alignment of the welding head and the nickel sheet groove, the rotating claw and the tooling clamping position, and significantly improves the welding quality and the turnover reliability.

[0012] Preferably, a tooling pressing plate is further included, the tooling pressing plate is fixedly installed on both sides of the conveying part, and the tooling pressing plate is located below the welding part. Specifically, the tooling pressing plate will finally press on the side position of the upper part of the tooling. Since the welding head may generate a reaction force when it contacts or acts on the nickel sheet during the welding operation, the light load tooling may jump slightly or be locally lifted, which affects the consistency of the welding points and even causes false welding. The tooling pressing plate arranged in the present solution forms a limiting constraint on the tooling body from the side above, cooperates with the top plate and the positioning pin below to form a double fixing structure of "pressing from above and lifting from below", significantly suppresses the dynamic displacement of the tooling under the action of the welding force, and ensures the stable and reliable welding process.

[0013] Preferably, the welding part is provided with a plurality of welding parts, the plurality of welding parts are evenly divided into two groups, and the two groups of welding parts are symmetrically distributed on the front and rear sides of the turnover part. After the tooling completes the upper electrode welding, it is sent to the turnover part by the conveying part to turn over by 180°, and then directly enters another group of welding parts located at the rear side of the turnover part to complete the lower electrode welding, without backtracking or detouring. The symmetrical layout makes the "upper welding → turnover → lower welding" form a one-way, straight-flow process path, reduces the reciprocating transportation time of the tooling, shortens the production rhythm, and improves the overall welding efficiency. Moreover, each group contains a plurality of welding heads which can simultaneously perform welding operation on a plurality of battery packs, effectively improving the processing efficiency.

[0014] Preferably, the first pushing device is a finger cylinder, which comprises two symmetrically arranged clamping jaws and a cylinder body, the two clamping jaws are both mounted on the working end of the cylinder body, the rotating claw is provided with two, the two rotating claws are respectively mounted on the two clamping jaws, and the two rotating claws are oppositely arranged. In this way, by taking the finger cylinder as the first pushing device, the opening and closing movement of the two symmetric clamping jaws is utilized to drive the two rotating claws mounted thereon to approach or move away synchronously, so that the bidirectional synchronous clamping and releasing of the tooling is realized. Compared with the unilateral pushing or non-synchronous clamping mode, the design effectively avoids the problems of tooling skewing or stress concentration caused by unbalanced clamping, ensures stable clamping action and uniform stress, and provides a high-precision basis for subsequent overturning operation.

[0015] In order to optimize the layout of each part of the device and the rationality of tooling overturning, the two rotating claws can clamp the short side of the tooling, and the overturning axis is parallel to the long side of the tooling. After such arrangement, the required rotating radius is smaller, the equipment action envelope space is reduced, the compact layout of the production line is beneficial, and the rotating inertia is also reduced, so that the overturning response speed and energy consumption efficiency are improved.

[0016] It should be noted that the second pushing device and the third pushing device can both be cylinders. The finger cylinder is also a conventional product on the market.

[0017] Preferably, a tooling return conveying belt is further included, which is arranged in parallel on one side of the conveying part. In this way, after the tooling completes all welding processes and unloads the finished battery pack, it can automatically return to the starting end or the feeding station through the tooling return conveying belt, without manual carrying or forklift transfer. The design realizes the unmanned and continuous circulation of the tooling, effectively reduces manual intervention, and improves the degree of automation of the production line.

[0018] In summary, such a kind of overturning type battery pack welding device has compact structure and reasonable layout. Through the automatic operation of the conveying, positioning, welding and overturning cooperation processes, the traditional manual positioning and welding operation are replaced, and the labor intensity of workers is significantly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] The utility model will be further described in connection with the drawings and specific embodiments:

[0020] Figure 1 It is the structure schematic view of the overturning type battery pack welding device of the utility model;

[0021] Figure 2 It is the structure schematic view of the welding part in the overturning type battery pack welding device of the utility model;

[0022] Figure 3The structure schematic view of the positioning device in the turnover type battery pack welding device;

[0023] Figure 4 The structure schematic view of the turnover part in the turnover type battery pack welding device;

[0024] Figure 5 The structure schematic view of the first advancing device in the turnover type battery pack welding device;

[0025] Among them:

[0026] 1-transport part;

[0027] 2-turnover part;21-rotary claw;22-first advancing device;221-claw;222-cylinder body;23-second advancing device;

[0028] 3-welding part;31-welding head;32-rotating device;33-displacement device;

[0029] 4-positioning device;41-third advancing device;42-top plate;43-positioning pin;

[0030] 5-fixture pressing plate;

[0031] 6-fixture reflow transport belt;

[0032] 7-fixture. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail by combining with the drawings and examples. It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model.

[0034] In the description of the utility model, it should be understood that the orientation and position relationship indicated by "up", "down", "left", "right", "front", "back", "vertical", "bottom", "inner", "outer" and the like are the orientation or position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and are not used to indicate or imply that the indicated device or element must have a particular orientation, a particular orientation structure and operation, and therefore cannot be understood as a limitation on the utility model.

[0035] Reference Figures 1 to 4As shown, a kind of turnover battery pack welding device, including transport part 1, turnover part 2 and welding part 3, turnover part 2 and welding part 3 are set to the top of transport part 1, welding part 3 is symmetrically set to the front and back of turnover part 2, welding part 3 includes welding head 31, rotating device 32 and displacement device 33, displacement device 33 is set to the top of transport part 1, rotating device 32 is installed to the mobile end of displacement device 33, welding head 31 is fixedly installed to the rotating end of rotating device 32, turnover part 2 includes rotating claw 21, first propulsion device 22 and second propulsion device 23, second propulsion device 23 is set to the top of transport part 1, first propulsion device 22 is installed to the working end of second propulsion device 23, rotating claw 21 is installed to the working end of first propulsion device 22, rotating claw 21 can move up and down and front and back under the drive of first propulsion device 22 and second propulsion device 23. Wherein, transport part 1 can be the conveying belt commonly seen on the market, and two conveying belts are arranged at intervals and form a space between them for the movement of positioning device 4. The displacement device 33 of the welding part 3 is an electric guide rail available on the market, which can drive the rotating device 32 to move in XYZ axis direction.

[0036] Due to the difference of customer demand, the slot direction on the nickel sheet is different, which leads to the need to adjust the orientation of the battery pack during welding. And the battery pack is usually placed in the tooling 7, so the direction needs to be adjusted by rotating the tooling 7 as a whole, which undoubtedly expands the equipment occupied space and causes space waste in layout.

[0037] The working principle of the scheme is: the tooling 7 with the battery pack is placed at the starting end of the transport part 1, then the tooling 7 is first transported to the welding part 3 for welding connection of the nickel sheet and the electrode on the battery cell, wherein the rotating device 32 arranged on the welding part 3 drives the welding head 31 to rotate around the predetermined axis, so that it can adapt to the different slot structures on the nickel sheet, thereby completing the welding connection of the nickel sheet and the electrode on the battery cell. After welding, the tooling 7 is transported to the turnover part 2, then the rotating claw 21 of the turnover part 2 clamps the tooling 7 and lifts it as a whole and rotates 180° around the horizontal axis, realizes the automatic turnover of the battery pack, then the tooling 7 is placed back to the transport part 1. Finally, the tooling 7 enters the welding part 3 again, and the welding connection of the nickel sheet and the lower electrode of the battery cell is completed.

[0038] In the present application, the rotatable welding head 31 effectively replaces the traditional large-scale rotating tool 7, significantly reducing the equipment action envelope space, reducing the demand for production line rotation area, facilitating compact layout, improving space utilization, and reducing waste of site resources. It is worth mentioning that the rotating tool 7 needs to be equipped with a larger power driving device, which will increase the energy consumption and part wear of the equipment during long-term use, while the rotating welding head 31 only needs a small and precise rotating shaft, which is compact in structure and high in reliability. In addition, the turnover part 2 clamps the tool 7 by the rotating claw 21 and is lifted as a whole to rotate 180° around the horizontal shaft, which can ensure the stability of the tool 7 and the internal battery pack during the turnover process, and can also accurately complete the turnover action.

[0039] It should be noted that the welding head 31 is connected with the welding machine, the welding machine is arranged on one side of the conveying part 1, and the welding head 31 and the welding machine are common products on the market, so they will not be described again. The rotating claw 21 can be a common electric rotating claw 221 on the market, and the rotating device 32 can be a common servo motor on the market, so they will not be described again.

[0040] Further, referring to FIGS. 1 and 2, Figure 1 and Figure 3 Further, referring to FIGS. 1 and 2, and

[0041] Further, referring to FIGS. 1 and 2, Figure 1As shown, the tool pressing plate 5 is fixedly installed on both sides of the conveying part 1 and is located below the welding part 3. Specifically, the top plate 42 lifts the tool 7, and finally the tool pressing plate 5 is pressed on the side of the upper part of the tool 7. Because the welding head 31 may generate a reaction force when it is in contact or action with the nickel sheet during the welding operation, the tool 7 under light load may slightly jump or locally lift, which affects the consistency of the welding points and even causes false welding. In the present scheme, the tool pressing plate 5 is arranged to limit and constrain the tool 7 from the side above, and cooperates with the lower top plate 42 and the positioning pin 43 to form a double fixing structure of “pressing from above and top from below”, which significantly suppresses the dynamic displacement of the tool 7 under the action of the welding force, and ensures the stability and reliability of the welding process.

[0042] Further, referring to Figure 1 As shown, the welding part 3 is provided with a plurality of welding parts 3, and the plurality of welding parts 3 are evenly divided into two groups, and the two groups of welding parts 3 are symmetrically distributed on the front and rear sides of the turnover part 2. After the tool 7 completes the upper electrode welding, it is sent to the turnover part 2 through the conveying part 1 to turn over by 180°, and then directly enters another group of welding parts 3 located on the rear side of the turnover part 2 to complete the lower electrode welding, without backtracking or detouring. The symmetrical layout makes the “upper welding → turnover → lower welding” form a one-way, straight-flow process path, which reduces the reciprocating transportation time of the tool 7, shortens the production rhythm, and improves the overall welding efficiency. Moreover, the plurality of welding heads 31 in each group can simultaneously perform welding operations on a plurality of battery packs, effectively improving the processing efficiency.

[0043] Further, referring to Figure 4 and Figure 5 As shown, the first pushing device 22 is a finger air cylinder, which includes two symmetrically arranged clamping jaws 221 and a cylinder body 222, and the two clamping jaws 221 are installed on the working end of the cylinder body 222. The rotating claw 21 is provided with two, and the two rotating claws 21 are respectively installed on the two clamping jaws 221, and the two rotating claws 21 are oppositely arranged. In this way, by taking the finger air cylinder as the first pushing device 22, the opening and closing movement of the two symmetric clamping jaws 221 is utilized to drive the two rotating claws 21 respectively installed thereon to synchronously approach or move away, so as to realize the bidirectional synchronous clamping and releasing of the tool 7. Compared with the single-side pushing or non-synchronous clamping mode, this design effectively avoids the problem of tool 7 skewing or stress concentration caused by unbalanced clamping, ensures stable clamping action and uniform stress, and provides a high-precision basis for subsequent turnover operation.

[0044] In order to optimize the layout of each part of the device and the rationality of the tool 7 turnover, the two rotating claws 21 can clamp the short side of the tool 7, and the turnover axis is parallel to the long side of the tool 7. After such arrangement, the required rotating radius will be smaller, and the equipment action envelope space is reduced, which is beneficial to the compact layout of the production line, and at the same time reduces the rotating inertia, improves the turnover response speed and energy efficiency.

[0045] It should be noted that the second propulsion device 23 and the third propulsion device 41 can be air cylinders. Finger air cylinders are also conventional products on the market.

[0046] Further, referring to Figure 1 As shown in FIG. 6, the welding device further comprises a tool return conveying belt 6 arranged in parallel to one side of the conveying part. In this way, after the tool 7 completes all welding processes and unloads the finished battery pack, the tool 7 can automatically return to the starting end or the loading station through the tool return conveying belt 6, without manual carrying or forklift transfer. This design realizes the unmanned and continuous circulation of the tool 7, effectively reduces manual intervention, and improves the degree of automation of the production line.

[0047] In summary, such a turnover type battery pack welding device has compact structure and reasonable layout. Through automatic operation of the conveying, positioning, welding and turnover cooperation processes, the traditional manual positioning and welding operation are replaced, and the labor intensity of workers is significantly reduced.

[0048] In summary, the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A flip-type battery pack welding device, characterized in that, The device includes a transport section, a tilting section, and a welding section. The tilting section and the welding section are both located above the transport section. The welding section is symmetrically arranged on the front and rear sides of the tilting section. The welding section includes a welding head, a rotating device, and a displacement device. The displacement device is located above the transport section. The rotating device is mounted on the moving end of the displacement device. The welding head is fixedly mounted on the rotating end of the rotating device. The tilting section includes a rotating claw, a first propulsion device, and a second propulsion device. The second propulsion device is located above the transport section. The first propulsion device is mounted on the working end of the second propulsion device. The rotating claw is mounted on the working end of the first propulsion device. The rotating claw can move up and down and back and forth under the drive of the first propulsion device and the second propulsion device.

2. The flip-type battery pack welding device according to claim 1, characterized in that, It also includes a positioning device, of which multiple positioning devices are provided. Each of the multiple positioning devices is located below the transport section and corresponds one-to-one with the flipping section and the welding section. Each positioning device includes a third propulsion device and a top plate. The third propulsion device is located below the transport section, and the top plate is fixedly installed on the working end of the third propulsion device. The top plate can move up and down under the drive of the third propulsion device, and a positioning pin is fixedly provided on the top plate.

3. The flip-type battery pack welding device according to claim 2, characterized in that, It also includes tooling pressure plates, which are fixedly installed on both sides of the transport section and are located below the welding section.

4. The flip-type battery pack welding device according to claim 3, characterized in that, The welding section is provided in multiple ways, and the multiple welding sections are evenly divided into two groups, with the two groups of welding sections symmetrically distributed on the front and rear sides of the flipping section.

5. The flip-type battery pack welding device according to claim 1, characterized in that, The first propulsion device is a finger cylinder, which includes two symmetrically arranged grippers and a cylinder body. Both grippers are mounted on the working end of the cylinder body. There are two rotating claws, which are respectively mounted on the two grippers and are arranged opposite to each other.

6. The flip-type battery pack welding device according to claim 1, characterized in that, It also includes a tooling return conveyor belt, which is arranged parallel to one side of the conveying section.

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