Battery pack welding device

Abstract

The utility model discloses a battery pack welding device which comprises a conveying base and a positioning assembly located in the conveying base and used for moving a battery pack, the positioning assembly is movably connected with the conveying base through a conveying assembly, and the positioning assembly comprises a mounting base and a positioning base connected into the mounting base in a sliding mode; a pressing assembly and a welding assembly are arranged on one side of the conveying base, and the pressing assembly and the welding assembly are arranged in the moving direction of the positioning assembly in the conveying base. After the electrode plates are loaded and placed, the hollow pressing plate assembly is used for pressing and fixing the battery pack tabs and the electrode plates, and finally, the laser welding machine generates laser to weld and process the battery pack tabs and the electrode plates. According to the whole leveling welding assembly for assembling the battery pack, the welding quality between the battery pack tabs and the electrode plates is improved, and the conditions of pseudo soldering, false soldering and short circuit are avoided.

Description

Technical Field

[0001] This utility model relates to the field of battery pack welding technology, specifically a battery pack welding device. Background Technology

[0002] During the production and processing of pouch batteries, electrode plates need to be welded onto the positive and negative tabs of the battery to facilitate the subsequent assembly of the pouch batteries into a complete new energy vehicle battery pack.

[0003] However, the positive and negative tabs of existing soft-pack batteries are usually uneven when they leave the factory. Directly laser welding them to the electrode plate can easily lead to problems such as poor welding, false welding, and short circuits, which greatly affects the overall product quality of the battery pack.

[0004] In addition, the welding of the tabs and electrode sheets of existing pouch batteries is usually carried out by using a robotic arm to grasp and a mold to position them. The time interval between loading and unloading after each processing is long, which seriously affects the efficiency of laser welding of battery pack tabs. Utility Model Content

[0005] The purpose of this invention is to provide a battery pack welding device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A battery pack welding apparatus includes a conveyor seat and a positioning component located within the conveyor seat for moving the battery pack. The positioning component is movably connected to the conveyor seat via a conveyor component. The positioning component includes a mounting base and a positioning seat slidably connected within the mounting base.

[0008] A flattening component and a welding component are provided on one side of the conveyor seat. The flattening component and the welding component are arranged along the moving direction of the positioning component within the conveyor seat.

[0009] By setting up a conveying component, the positioning component containing the battery pack is moved sequentially to below the flattening component and the welding component. This allows the battery pack tabs to be flattened before welding, avoiding problems such as incomplete welding caused by direct welding.

[0010] As a further embodiment of this utility model: the conveying assembly includes multiple transmission wheels, and the conveying seat is provided with a drive mechanism for driving the transmission wheels to rotate. The drive mechanism is a transmission motor, and a transmission belt is wound around the transmission wheels.

[0011] A closed-loop transmission belt is set between the two sets of transmission wheels, and positioning components are connected at equal intervals to the outer surface of the closed-loop transmission belt, so that the positioning components can be recycled.

[0012] As a further embodiment of this utility model: multiple positioning components are provided, and multiple positioning components are connected to the conveyor belt.

[0013] It is equipped with multiple positioning components, which can continuously feed materials and increase processing efficiency.

[0014] As a further embodiment of this utility model: a guide rod is slidably connected to one end of the mounting base, one end of the guide rod is fixedly connected to the positioning base, the other end of the guide rod passes through the end wall of the mounting base and is equipped with an abutment wheel, and support wall plates are provided on both sides of the conveying base, with the abutment wheel arranged in contact with the inner side of the support wall plate of the conveying base.

[0015] By pushing the guide rod with the abutment wheel, the positioning seat can be pushed to slide horizontally within the mounting seat, which can push the battery pack being transported to move along the direction perpendicular to the material flow. In other words, the tabs of the battery cells can be pushed under the flattening assembly and welding assembly to facilitate flattening and welding.

[0016] As a further embodiment of this utility model: the end of the mounting base away from the guide rod is an open structure, the end of the positioning base away from the guide rod is an open end, a notch is provided on the side support wall of the conveying base where the flattening component and the welding component are located, the notch is located at the position of the flattening component and the welding component, and an abutment strip that cooperates with the notch is provided on the other side support wall of the conveying base, the abutment wheel and the abutment strip are at the same height.

[0017] By setting an abutment bar, when the abutment wheel passes over the abutment bar and rolls on the abutment bar, it will push the positioning seat to move horizontally through the guide rod, and set the battery pack on the positioning seat to move horizontally so as to move the battery pack's tabs through the notch to the flattening assembly and welding assembly below.

[0018] As a further embodiment of this utility model: a second elastic component (305) is provided between the inner wall of the mounting base and the positioning base, and the second elastic component is arranged parallel to the guide rod.

[0019] By setting a second elastic component, the positioning seat is in a stretched state when it moves horizontally, and the positioning seat can be reset by the second elastic component.

[0020] As a further embodiment of this utility model: the flattening assembly includes a first linear drive assembly fixedly connected to the support wall plate of the conveying seat, the first linear drive assembly is powered by a pressure block, a flattening support strip is provided at the upper end of the notch, and the pressure block is located above the flattening support strip.

[0021] The tabs of the battery pack can be flattened by setting flattening strips and pressure blocks.

[0022] As a further embodiment of this utility model: the welding assembly includes a side frame fixedly connected to the support wall plate of the conveyor seat, a laser welding head is provided at the upper end of the side frame, a hollow pressure plate assembly is provided below the laser welding head and slidably connected to the side frame, and a pressing strip is provided on the notch to cooperate with the hollow pressure plate assembly.

[0023] Laser welding heads can be used to weld battery tabs.

[0024] As a further embodiment of this utility model: the upper end of the side frame extends to one side to form a transverse support plate, the transverse support plate is provided with a guide rail, the laser welding head is slidably connected to the transverse support plate through the guide rail, and the transverse support plate is provided with a second linear drive assembly for driving the laser welding head to move horizontally.

[0025] The laser welding head can be moved horizontally by the second linear drive component, thus enabling laser welding at different locations.

[0026] As a further embodiment of this utility model: the hollow pressure plate assembly includes a guide seat fixedly connected to the side frame, a guide post slidably connected to the guide seat, a strip plate fixedly connected to the upper end of the guide post, the strip plate being located above the pressing support strip, a hollow portion being provided on the strip plate, a first elastic component being sleeved on the guide post of the strip plate, the first elastic component being located between the strip plate and the guide post, a magnetic block being fixedly connected to the lower end of the guide post, and an electromagnet cooperating with the magnetic block being provided on the side frame, the electromagnet being located below the magnetic block.

[0027] The magnetic block is attracted by an electromagnet, which moves the strip plate downwards. The strip plate and the clamping strip below then press the battery pack tabs together to facilitate laser welding.

[0028] Compared with the prior art, the beneficial effects of this utility model are:

[0029] 1. In this application, before welding the battery pack tabs and electrode sheets, the tabs are first pressed flat by the action of the pressure block and the flattening strip. After the electrode sheets are placed and loaded, the battery pack tabs and electrode sheets are pressed and fixed by the hollow pressure plate assembly. Finally, the battery pack tabs and electrode sheets are welded by laser using a laser welding machine. The flattening and welding assembly used for the entire battery pack assembly not only improves the welding quality between the battery pack tabs and electrode sheets, but also avoids the occurrence of false welding, cold welding, and short circuits.

[0030] 2. In this application, when the battery pack is conveyed sequentially through the tab flattening station, electrode sheet loading station and laser welding station by the positioning component, the tabs on the battery pack can be automatically extended through the action between the abutment roller and the abutment strip, and then the sheet pressing and welding processes are performed. There is no need to set up corresponding cylinders or telescopic drive components to push the battery pack so that its tabs extend under the flattening and laser welding mechanism, which effectively simplifies the structure of the entire device, and the assembly line operation also effectively improves its production efficiency. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the three-dimensional structure from the first angle of the embodiment;

[0032] Figure 2 This is a schematic diagram of the second-angle three-dimensional structure of this embodiment;

[0033] Figure 3 This is a three-dimensional structural diagram of the battery pack in the positioning component in this embodiment;

[0034] Figure 4 This is a three-dimensional structural diagram of the side frame, laser welding head, and hollow pressure plate assembly in this embodiment;

[0035] Figure 5 Example Figure 2 Enlarged structural diagram at point A;

[0036] In the diagram: 1-Conveying seat, 101-Notch, 102-Flattening support strip, 103-Abutting strip, 2-Conveying assembly, 201-Drive wheel, 202-Drive motor, 203-Transmission belt, 3-Positioning assembly, 301-Mounting seat, 302-Positioning seat, 303-Guide rod, 304-Abutting wheel, 305-Second elastic assembly, 4-Battery pack, 5-First linear drive assembly, 501-Pressure block, 6-Side frame, 601-Guide slide rail, 7-Laser welding head, 8-Second linear drive assembly, 9-Hollowed pressure plate assembly, 901-Strip plate, 902-Hollowed part, 903-Guide column, 904-Guide seat, 905-First elastic assembly, 906-Magnetic block, 907-Electromagnet. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] Please see Figure 1 , Figure 2 In this embodiment of the present invention, a battery pack welding device includes a conveying seat 1 and a positioning component 3 located inside the conveying seat 1 for moving the battery pack. The positioning component 3 is movably connected to the conveying seat 1 through a conveying component 2. In this embodiment, the conveying component 2 includes two drive wheels 201 located at both ends of the conveying seat 1. The conveying seat 1 is provided with a drive motor 202 for driving the drive wheels 201 to rotate. A transmission belt 203 is wound around the two drive wheels 201. A closed loop transmission belt 203 is provided between the two sets of drive wheels 201. The positioning component 3 is connected at equal intervals to the outer surface of the closed loop transmission belt 203, thereby allowing the positioning component 3 to be recycled.

[0039] Please see Figure 3 The positioning component 3 includes a mounting base 301 and a positioning seat 302 slidably connected within the mounting base 301. Multiple positioning components 3 are provided and connected to the conveyor belt 203. A guide rod 303 is slidably connected to one end of the mounting base 301. One end of the guide rod 303 is fixedly connected to the positioning seat 302. A second elastic component 305 is provided on both sides of the guide rod 303. The second elastic component 305 is a spring. The two ends of the second elastic component 305 are fixedly connected to the inner wall of the mounting base 301 and one end of the positioning seat 302, respectively. By providing the second elastic component 305, the second elastic component 305 is in a stretched state when the positioning seat 302 moves horizontally. The positioning seat 302 can be reset by the second elastic component 305.

[0040] The other end of the guide rod 303 passes through the end wall of the mounting base 301 and is fitted with an abutment wheel 304. Supporting wall plates are provided on both sides of the conveyor base 1. The abutment wheel 304 is arranged in contact with the inner side of the supporting wall plates of the conveyor base 1. The end of the mounting base 301 away from the guide rod 303 is an open structure. The end of the positioning base 302 away from the guide rod 303 is also an open end. A notch 101 is provided on the supporting wall plate on the side of the conveyor base 1 where the flattening assembly and welding assembly are located. The notch 101 is located at the position of the flattening assembly and welding assembly. On the other side of the support wall of the conveyor seat 1, there is an abutment strip 103 that cooperates with the notch 101. The abutment wheel 304 and the abutment strip 103 are at the same height. By setting the abutment strip 103, when the abutment wheel 304 passes the abutment strip 103 and rolls on the abutment strip 103, it will push the positioning seat 302 to move horizontally through the guide rod 303. The battery pack on the positioning seat 302 is set to move horizontally so as to move the battery pack's tabs through the notch to the flattening assembly and welding assembly.

[0041] Please see Figure 1 , Figure 5A flattening component and a welding component are provided on one side of the conveyor seat 1. The flattening component and the welding component are arranged along the moving direction of the positioning component 3 in the conveyor seat 1. In this embodiment, the flattening component includes a first linear drive component 5 fixedly connected to the support wall plate of the conveyor seat 1. The first linear drive component 5 is powered by a pressure block 501. In this embodiment, the first linear drive component 5 is a cylinder, a hydraulic cylinder, or a linear motor. A flattening support strip 102 is provided at the upper end of the notch 101, and the pressure block 501 is located above the flattening support strip 102.

[0042] Please see Figure 4 The welding assembly includes a side frame 6 fixedly connected to the support wall of the conveyor seat 1. A laser welding head 7 is provided at the upper end of the side frame 6. A hollow pressure plate assembly 9 slidably connected to the side frame 6 is provided below the laser welding head 7. A clamping strip that cooperates with the hollow pressure plate assembly 9 is provided on the notch 101. The upper end of the side frame 6 extends to one side to form a transverse support plate. A guide rail 601 is provided on the transverse support plate. The laser welding head 7 is slidably connected to the transverse support plate through the guide rail 601. A second linear drive assembly 8 for driving the laser welding head 7 to move horizontally is provided on the transverse support plate. The second linear drive assembly 8 is a cylinder, a hydraulic cylinder, or a linear motor. The laser welding head 7 can be moved horizontally by the second linear drive assembly 8, thereby enabling laser welding at different positions.

[0043] The hollow pressure plate assembly 9 includes a guide seat 904 fixedly connected to the side frame 6. A guide post 903 is slidably connected to the guide seat 904. A strip plate 901 is fixedly connected to the upper end of the guide post 903. The strip plate 901 is located above the pressing support strip. A hollow part 902 is provided on the strip plate 901. A first elastic component 905 is sleeved on the guide post 903. In this embodiment, the first elastic component 905 is a spring. The first elastic component 905 is located between the strip plate 901 and the guide post 903. A magnetic block 906 is fixedly connected to the lower end of the guide post 604. An electromagnet 907 that cooperates with the magnetic block 906 is provided on the side frame 6. The electromagnet 907 is located below the magnetic block 906. By attracting the magnetic block 906, the electromagnet 907 can drive the strip plate 901 to move downward. Then, the battery pack tabs can be pressed together by the strip plate 901 and the pressing support strip below, so as to facilitate laser welding.

[0044] In addition, in this embodiment, a space for feeding electrode sheets is provided between the flattening assembly and the welding assembly.

[0045] In use, the battery packs 4 are placed one by one into the positioning slots on the upper surface of the positioning seat 302 by a robotic arm or manually on the conveyor seat 1, with the positive and negative tabs on the battery packs 4 facing backward. Under the power input of the drive motor 202, the closed-loop conveyor belt 203 can perform intermittent transmission, so that the positioning component 3 after loading passes through the flattening component, the electrode sheet loading station and the laser welding component in sequence.

[0046] When the positioning component 3 moves to the flattening component, the abutting wheel 304, under the action of the abutting strip 103, can overcome the action of the second elastic component 305 and push the positioning seat 302 and the battery pack 4 backward, so that the positive and negative electrode ears on the battery pack 4 extend above the flattening support strip 102. Then, the first linear drive component 5 is activated to move the pressing block 501 downward. Then, under the combined action of the pressing block 501 and the flattening support strip 102, the positive and negative electrode ears on the battery pack 4 are pressed flat.

[0047] Subsequently, the positioning component 3 moves to the electrode sheet loading station. At this point, the electrode sheets can be placed on the positive and negative tabs of the battery pack 4 by a robotic arm or manually, and then transported to the welding component. Before laser welding, current is passed through the electromagnet 907 to generate an attraction force on the magnetic block 906. Then, the strip plate 901 moves downward against the supporting force of the first elastic component 905, thereby pressing the electrode sheet and the battery pack tabs together on the upper surface of the clamping strip for laser welding. Finally, the laser welding head 7 emits a laser, which passes through the hollow part 902 on the strip plate 901 to weld the electrode sheet and the tabs.

[0048] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0049] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A battery pack welding apparatus characterized by comprising: The utility model provides a battery pack conveying device, including conveying seat (1) and the positioning assembly (3) for moving battery pack in the conveying seat (1), the positioning assembly (3) is connected with the conveying seat (1) through conveying assembly (2), the positioning assembly (3) includes mounting seat (301) and the positioning seat (302) slidingly connected in the mounting seat (301), One side of the conveying seat (1) is provided with a flattening assembly and a welding assembly, the flattening assembly and the welding assembly are arranged along the movement direction of the positioning assembly (3) in the conveying seat (1).

2. The battery pack welding device of claim 1, wherein, The conveying assembly (2) includes a plurality of transmission wheels (201), the conveying seat (1) is provided with a driving mechanism for driving the transmission wheels (201) to rotate, the driving mechanism is a transmission motor (202), and the transmission wheels (201) are wound with a transmission belt (203).

3. The battery pack welding apparatus of claim 2, wherein, The positioning assembly (3) is provided with a plurality of positioning assemblies (3) connected to the transmission belt (203).

4. The battery pack welding apparatus of claim 1, wherein, One end of the mounting seat (301) is slidingly connected with a guide rod (303), one end of the guide rod (303) is fixedly connected with the positioning seat (302), the other end of the guide rod (303) penetrates through the end wall of the mounting seat (301) and is provided with an abutting wheel (304), both sides of the conveying seat (1) are provided with support wall plates, and the abutting wheel (304) is arranged in contact with the inner side of the support wall plate of the conveying seat (1).

5. The battery pack welding apparatus of claim 4, wherein, The other end of the mounting seat (301) away from the guide rod (303) is of an open structure, the other end of the positioning seat (302) away from the guide rod (303) is of an open end, the side support wall plate of the conveying seat (1) provided with the flattening assembly and the welding assembly is provided with a notch (101), the notch (101) is located at the position of the flattening assembly and the welding assembly, the support wall plate on the other side of the conveying seat (1) is provided with an abutting strip (103) matched with the notch (101), and the abutting wheel (304) and the abutting strip (103) are located at the same height.

6. The battery pack welding apparatus of claim 4, wherein, A second elastic assembly (305) is arranged between the inner wall of the mounting seat (301) and the positioning seat (302), and the second elastic assembly (305) is arranged in parallel with the guide rod (303).

7. The battery pack welding apparatus of claim 5, wherein, The flattening assembly includes a first linear drive assembly (5) fixedly connected with the support wall plate of the conveying seat (1), the first linear drive assembly (5) is provided with a pressing block (501) connected with a power source, the upper end of the notch (101) is provided with a flattening bracket (102), and the pressing block (501) is located above the flattening bracket (102).

8. The battery pack welding apparatus of claim 5, wherein, The welding assembly includes a side frame (6) fixedly connected with the support wall plate of the conveying seat (1), the upper end of the side frame (6) is provided with a laser welding head (7), the lower side of the laser welding head (7) is provided with a hollow pressing plate assembly (9) slidingly connected with the side frame (6), and the notch (101) is provided with a pressing bracket matched with the hollow pressing plate assembly (9).

9. The battery pack welding apparatus of claim 8, wherein, The upper end of the side frame (6) extends to one side to form a transverse support plate, a guide slide rail (601) is arranged on the transverse support plate, the laser welding head (7) is slidably connected with the transverse support plate through the guide slide rail (601), and a second linear drive assembly (8) for driving the laser welding head (7) to move horizontally is arranged on the transverse support plate.

10. The battery pack welding apparatus of claim 8, wherein, The hollow pressing plate assembly (9) comprises a guide seat (904) fixedly connected with the side frame (6), a guide column (903) slidably connected with the guide seat (904), a strip-shaped plate (901) fixedly connected with the upper end of the guide column (903), the strip-shaped plate (901) being located above the pressing supporting strip, a hollow portion (902) arranged on the strip-shaped plate (901), a first elastic assembly (905) sleeved with the strip-shaped plate guide column (903), the first elastic assembly (905) being located between the strip-shaped plate (901) and the guide column (903), a magnetic attraction block (906) fixedly connected with the lower end of the guide column (903), and an electromagnet (907) arranged on the side frame (6) and matched with the magnetic attraction block (906), the electromagnet (907) being located below the magnetic attraction block (906).

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