Battery tab bending device and assembled battery tab bending device

Abstract

The utility model relates to a battery tab bending device and an assembled battery tab bending device, the battery tab bending device comprises a tab bending assembly and a tab bending workbench; the tab folding assembly comprises a vertical mounting plate assembly, a third linear guide rail pair is arranged on the vertical mounting plate assembly, a tab folding mechanism is arranged on the third linear guide rail pair, the tab folding mechanism comprises a first air cylinder, a second bearing mounting seat, a second air cylinder, a tab folding clamping jaw and a synchronous driving mechanism, the first air cylinder is fixedly arranged on the vertical mounting plate assembly, and the second air cylinder is fixedly arranged on the second bearing mounting seat. A bearing is arranged in the bearing mounting seat II, the air cylinder II is connected with an inner ring of the bearing, the tab folding clamping jaw is connected with the air cylinder II, and the synchronous driving mechanism drives the air cylinder II to rotate according to a preset angle; the tab folding workbench comprises a tab folding workbench transverse plate, the tab folding workbench transverse plate is provided with a third air cylinder and a positioning block which are used for clamping the battery, and a battery clamping plate is arranged at the front end of a piston rod of the third air cylinder. The utility model has the advantage of being suitable for being bent after the cover plate is welded on the tab.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production and processing, in particular to a battery tab bending device and a combined battery tab bending device. Background Art

[0002] Tabs are metal conductors that connect the positive and negative electrodes of a battery cell. Lithium-ion battery cells typically have two tabs: one for the positive electrode and one for the negative electrode. During battery production, these tabs must be bent. Traditionally, tab bending is largely manual, resulting in low efficiency and inconsistent folding.

[0003] Chinese patent document CN 114289576 A discloses a lithium battery tab bending device, including a tab bending mechanism and a battery conveying mechanism; the tab bending mechanism includes a vertically arranged rotating shaft I, on which a pair of turntables are mounted, and the outer periphery of the turntables is connected to a rotating shaft II, and a pressing cylinder for bending the tabs is mounted outside the rotating shaft II; the battery conveying mechanism includes a slide rail and a slide slidably mounted on the slide rail; the sliding direction of the slide is tangent to the rotation trajectory of the turntable; a clamp for positioning the battery is fixed to one side of the slide, and the end of the slide close to the turntable has a positioning bar that abuts against the bent side of the battery tab. Although the device has improved the degree of automation and the efficiency of bending the battery tabs, the bending device uses a positioning bar to position the battery and provide a bending fulcrum, and uses a pressing cylinder set on the turntable to bend the tabs. This bending device can only bend the tabs that are not pre-welded with cover plates. However, in actual production, the difficulty of welding the cover plates on the bent tabs is much greater than the difficulty of welding the tabs before they are bent. Therefore, there is a need in the market for a battery tab bending device that is suitable for bending the tabs after the cover plates are welded on them. Utility Model Content

[0004] The utility model provides a battery tab bending device and an assembled battery tab bending device which are suitable for bending a tab after a cover plate is welded on the tab.

[0005] The utility model provides a battery tab bending device, including a tab folding assembly and a tab folding workbench, wherein the tab folding assembly and the tab folding workbench are arranged in parallel with a predetermined distance; the tab folding assembly includes a vertical mounting plate assembly, a linear guide pair three is horizontally provided on the vertical mounting plate assembly, a pair of relatively arranged tab folding mechanisms are provided on the linear guide pair three, the tab folding mechanism includes a cylinder one, a bearing mounting seat two, a cylinder two, a tab folding clamp and a synchronous drive mechanism, the cylinder one is fixed on the vertical mounting plate assembly, the bearing mounting seat Seat two is connected to the guide rail of linear guide pair three through the slider of linear guide pair three, the piston rod of cylinder one is connected to the slider, a bearing is provided in bearing mounting seat two, cylinder two is connected to the inner ring of the bearing, the folding ear clamp is connected to cylinder two, and its opening and closing is controlled by cylinder two, and the synchronous drive mechanism drives cylinder two to rotate at a predetermined angle; the folding ear workbench includes a folding ear workbench cross plate, and cylinder three and a positioning block for clamping the battery are provided on the folding ear workbench cross plate, and a battery clamp is provided at the front end of the piston rod of cylinder three.

[0006] As an improvement to the present invention, the synchronous drive mechanism includes a folding ear drive motor, a first synchronous wheel drive assembly, a second synchronous wheel drive assembly, a spline shaft and a cylinder connecting block. The folding ear drive motor is arranged on the side of the vertical mounting plate assembly away from the folding ear mechanism. The spline shaft is arranged below the folding ear mechanism through the bearing mounting seat 1 at both ends. The folding ear drive motor drives the spline shaft to rotate through the first synchronous wheel drive assembly; the spline shaft drives the cylinder 2 to rotate through the second synchronous wheel drive assembly; the upper end of the cylinder connecting block is connected to the piston rod of the cylinder 1, and the lower end of the cylinder connecting block is connected to the second synchronous wheel drive assembly. The cylinder 1 drives the second synchronous wheel drive assembly to move back and forth on the spline shaft through the cylinder connecting block.

[0007] As an improvement to the present invention, it further includes a linear module and a second linear guide pair, wherein the linear module and the second linear guide pair are arranged between the base plate and the mounting plate of the vertical mounting plate assembly, and the linear module drives the vertical mounting plate assembly to reciprocate along the second linear guide pair.

[0008] As an improvement to the present invention, the present invention also includes a handwheel adjustment assembly and a linear guide pair. The handwheel adjustment assembly includes a handwheel and a screw nut structure. The screw nut structure and the linear guide pair are arranged under the mounting plate. Rotating the handwheel can make the mounting plate move back and forth on the linear guide pair.

[0009] As an improvement to the present invention, the present invention further includes a tensioning mechanism, which is composed of a cam follower and a mounting block and is used to adjust the tension of the second synchronous wheel drive assembly.

[0010] As an improvement to the present invention, the present invention also includes an adsorption mechanism, which includes a suction cup, a cover plate placement block and a cylinder four, the suction cup is arranged on the upper side of the cover plate placement block, the cover plate placement block is connected to the cylinder four and is driven by the cylinder four.

[0011] As an improvement to the present invention, the present invention further comprises an oil pressure buffer provided on the vertical mounting plate assembly for absorbing the impact kinetic energy during the feeding of the cylinder.

[0012] As an improvement to the present invention, the present invention further comprises an infrared photoelectric switch, which is arranged on the vertical mounting plate assembly and is used to detect the rotation state of the folding lug clamping claw.

[0013] As an improvement to the present invention, the present invention also includes a pair of vertical plates of the folding ear workbench, which are arranged at both ends of the horizontal plate of the folding ear workbench, and a height adjustment block for adjusting the relative height of the horizontal plate of the folding ear workbench and the vertical plate of the folding ear workbench is provided between the horizontal plate of the folding ear workbench and the vertical plate of the folding ear workbench.

[0014] The present utility model also provides a combined battery tab bending device, comprising a battery tab bending device and a second battery tab bending device. The structure of the second battery tab bending device is the same as that of the above-mentioned battery tab bending device. The second battery tab bending device is symmetrically arranged with the above-mentioned battery tab bending device and is used to bend the tab at the other end of the square battery.

[0015] The utility model adopts oppositely arranged tab folding jaws. When the tab folding jaws clamp the ends of the cover plate on the tab, the driving mechanism drives the tab folding jaws to rotate a predetermined angle, such as 90 degrees, so that the cover plate and the tab are bent. The utility model is not only suitable for bending the tab after the cover plate is welded to the tab, but also has the advantages of simple structure and easy use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the planar structure of an embodiment of the utility model.

[0017] Figure 2 yes Figure 1 Schematic diagram of the three-dimensional structure of the embodiment shown (excluding the tab folding workbench).

[0018] Figure 3 yes Figure 2Another perspective structural diagram.

[0019] Figure 4 yes Figure 1 Schematic diagram of the structure of the center-folding tab workbench.

[0020] Figure 5 This is a three-dimensional structural diagram of another embodiment of the utility model DETAILED DESCRIPTION

[0021] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0022] like Figures 1 to 4 As shown, Figures 1 to 4 Disclosed is a battery tab bending device, comprising a tab folding assembly 100 and a tab folding workbench 200, wherein the tab folding assembly 100 and the tab folding workbench 200 are arranged in parallel at a predetermined distance; the tab folding assembly 100 comprises a vertical mounting plate assembly 106, on which a linear guide pair 3 119 is horizontally provided, and a pair of relatively arranged tab folding mechanisms 124 are provided on the linear guide pair 3 119, wherein the tab folding mechanism 124 comprises a cylinder 115, a bearing mounting seat 2 117, a cylinder 2 121, a tab folding clamp 120 and a synchronous drive mechanism 125, wherein the cylinder 115 is fixedly mounted on the vertical mounting plate assembly 106, and the bearing mounting seat 2 117 is driven by the linear guide pair 3 1 The slider 1191 of 19 is connected to the guide rail 1192 of the linear guide pair 3 119, the piston rod of the cylinder 115 is connected to the slider 1191, the bearing mounting seat 2 117 is provided with a bearing 1171, the cylinder 2 121 is connected to the inner ring of the bearing 1171, the folding ear clamp 120 is connected to the cylinder 2 121, and its opening and closing is controlled by the cylinder 2 121, and the synchronous drive mechanism 125 drives the cylinder 2 121 to rotate at a predetermined angle; the folding ear workbench 200 includes a folding ear workbench cross plate 202, and the folding ear workbench cross plate 202 is provided with a cylinder 3 205 and a positioning block 203 for clamping the battery, and a battery clamp 204 is provided at the front end of the piston rod of the cylinder 3 205.

[0023] The present invention utilizes relatively disposed tab folding jaws 120. When the tab folding jaws 120 clamp the ends of the cover plate 510 on the tab, the synchronous drive mechanism 125 drives the tab folding jaws 120 to rotate a predetermined angle, such as 90 degrees, so that the tab and the cover plate are bent. The present invention not only has the advantage of being suitable for bending the tab after the cover plate is welded to the tab, but also has the advantages of being simple in structure and easy to use.

[0024] Preferably, the synchronous drive mechanism 125 includes a folding ear drive motor 107, a first synchronous wheel drive assembly 109, a second synchronous wheel drive assembly 111, a spline shaft 113 and a cylinder connecting block 116, the folding ear drive motor 107 is arranged on the side of the vertical mounting plate assembly 106 away from the folding ear mechanism 124, the spline shaft 113 is arranged below the folding ear mechanism 124 through the bearing mounting seat 114 at both ends, and the folding ear drive motor 107 is arranged through the first synchronous wheel drive assembly 109, the second synchronous wheel drive assembly 111, the spline shaft 113 and the cylinder connecting block 116. The step wheel drive assembly 109 drives the spline shaft 113 to rotate; the spline shaft 113 drives the cylinder two 121 to rotate through the second synchronous wheel drive assembly 111; the upper end of the cylinder connecting block 116 is connected to the piston rod of the cylinder one 115, and the lower end of the cylinder connecting block 116 is connected to the second synchronous wheel drive assembly 111, and the cylinder one 115 drives the second synchronous wheel drive assembly 111 to reciprocate on the spline shaft 113 through the cylinder connecting block 116.

[0025] Preferably, the present invention also includes a linear module 103 and a linear guide pair 105, and the linear module 103 and the linear guide pair 105 are arranged between the base plate 1061 of the vertical mounting plate assembly 106 and the mounting plate 101. The linear module 103 drives the vertical mounting plate assembly 106 to move back and forth along the linear guide pair 105, which can be used to adjust the relative position of the folding tab mechanism and the battery.

[0026] Preferably, the present invention further includes a handwheel adjustment assembly 102 and a linear guide pair 104. The handwheel adjustment assembly 102 includes a handwheel 1021 and a screw-nut structure 1022. The screw-nut structure 1022 and the linear guide pair 104 are disposed below the mounting plate 101. Rotating the handwheel 1021 allows the mounting plate 101 to reciprocate on the linear guide pair 104. The use of the handwheel adjustment assembly 102 allows for adaptability to batteries of varying lengths.

[0027] Preferably, the present invention further includes a tensioning mechanism 112 , which is composed of a cam follower and a mounting block and is used to adjust the tension of the second synchronous wheel driving assembly 111 .

[0028] Preferably, the present invention further includes a suction mechanism 208, which includes a suction cup 2081, a cover plate placement block 209, and a cylinder 211. The suction cup 2081 is located on the upper side of the cover plate placement block 209. The cover plate placement block 209 is connected to and driven by the cylinder 211. The suction mechanism 208 can achieve pre-positioning so that the folding ear clamps 120 can clamp both ends of the cover plate 510.

[0029] Preferably, the present invention further includes an oil pressure buffer 118 provided on the vertical mounting plate assembly 106 for absorbing the impact kinetic energy of the cylinder 115 during feeding.

[0030] Preferably, the present invention further includes an infrared photoelectric switch 122, which is provided on the vertical mounting plate assembly 106 and is used to detect the rotation state of the folding tab clamp 120. In this embodiment, the infrared photoelectric switch 122 can be a reflective infrared photoelectric switch.

[0031] Preferably, the present invention further comprises a pair of tab folding workbench vertical plates 201, the tab folding workbench vertical plates 201 being arranged at both ends of the tab folding workbench horizontal plate 202, and a height adjustment block 206 for adjusting the relative height of the tab folding workbench horizontal plate 202 and the tab folding workbench vertical plates 201 being provided between the tab folding workbench horizontal plate 202 and the tab folding workbench vertical plates 201. The height adjustment block 206 is primarily designed to accommodate batteries 500 of different thicknesses.

[0032] Specifically, the numbers in the figure are:

[0033] 100 folding tab assembly, used to perform the tab folding action, implement the tab folding process, and realize the tab folding function;

[0034] 200 tab folding workbench, used to position and fix the battery 500 when completing the tab folding process;

[0035] 101 mounting plate, used for mounting the folded tab assembly;

[0036] 102 handwheel adjustment assembly, used to adjust the distance between the folding ear assemblies at both ends of the battery to adapt to batteries of different lengths;

[0037] 103 linear module, used to complete the feeding or retreating in the length direction of the battery when performing the tab folding action;

[0038] 104 linear guide pair 1, used to adapt to batteries of different lengths and adjust the distance between the folding tab assemblies;

[0039] 105 linear guide pair 2, used for completing the feeding or retreating of the battery in the length direction when performing the tab folding action;

[0040] 106 vertical mounting plate assembly, used for assembling and fixing a small assembly that performs the folding action of the pole ear;

[0041] The 107-fold lug drive motor can be a servo motor; it is connected to a synchronous wheel drive assembly, a synchronous belt tensioner and other mechanisms.

[0042] 108 solenoid valve, used to control the cylinder in the folding ear mechanism;

[0043] 109 first synchronous wheel drive assembly, the folded ear drive motor on the back transmits power to the synchronous wheel on the front;

[0044] 110 coupling, two couplings transmit the torque of the folding lug drive motor to the folding lug mechanisms on both sides of the battery;

[0045] 111 The second synchronous wheel drive assembly is a mechanism that transmits torque power from the spline shaft to the cover plate clamp after power is dispersed;

[0046] 112 tensioning mechanism, used to adjust the tension of the second synchronous wheel drive assembly 111, consisting of a cam follower and a mounting block;

[0047] 113 spline shaft, used to transmit the dispersed power to the transmission mechanism of the second synchronous wheel drive assembly through the coupling;

[0048] 114 Bearing mounting seat 1, a mechanical part used to fix the bearings at both ends of the spline shaft in the specified position;

[0049] 115 Cylinder 1, used to drive the folding ear clamp forward and backward;

[0050] 116 Cylinder connecting block, used to connect the cylinder and the folding ear clamp, and is linked to the rotating spline shaft;

[0051] 117 bearing mounting seat 2, used for fixing and mounting the bearing seat of the rotating shaft of the folding ear clamping claw cylinder;

[0052] 1171 bearings;

[0053] 118 oil pressure buffer, used to absorb the impact kinetic energy of cylinder 115 when feeding;

[0054] 119 linear guide pair three, used to guide the guide slider when the folding lug clamp moves forward and backward;

[0055] 1191 Slider

[0056] 1192 Guide Rail

[0057] 120° folding tab gripper, used to grip the battery cover when folding the tab;

[0058] 121 Cylinder 2, used to drive the opening and closing of the folding ear clamp;

[0059] 122 infrared photoelectric switch, a sensor for detecting the rotation state of the folding ear clamp;

[0060] 123 spline connection block, a connection block used to connect the rotary power and the lateral power together;

[0061] 124 folding tab mechanism;

[0062] 125 Synchronous drive mechanism;

[0063] 201 tab folding workbench vertical plate, used to support and install the load-bearing plate of the tab folding workbench;

[0064] 202 tab folding workbench cross plate, used to support and install the crossbeam plate of the tab folding workbench;

[0065] 203 positioning block, used to clamp the battery in place when folding the tabs;

[0066] 204 battery clamping plate, used to clamp the battery clamping plate when folding the tabs;

[0067] 205 cylinder three, used to provide power to clamp the battery when folding the tabs;

[0068] 206 height adjustment block, used for adjusting the height of the tab folding workbench;

[0069] 207 solenoid valve 1, used to control the solenoid valve of the battery clamping cylinder;

[0070] 208 adsorption mechanism, including a suction cup 2081, a suction cup for fixing the battery cover;

[0071] 209 cover plate placement block, used for connecting plate to control the lifting of suction cup with cylinder;

[0072] 210 solenoid valve 2, used to control the cylinder that lifts and lowers the suction cup;

[0073] 211 Cylinder 4 is used to provide the mechanism for lifting and lowering the suction cup;

[0074] 212 junction box, an electrical connection box used for circuit collection and control of the folding tab workbench.

[0075] In the present invention, the battery manufacturing process before folding the tabs is the tab cover welding, that is, the tabs and the cover are welded together.

[0076] When the battery completed in the previous process is carried to the folding ear station by the corresponding battery clamp of the previous station, the carrying clamp ensures that the folding ear clamp is outside the working position before placing the battery, that is, the cylinder 115 is in the retracted state;

[0077] First, the battery 500 is placed on the tab folding workbench 200, and the battery cover 510 is placed on the cover placement block 209; then the suction cup 208 opens the vacuum suction cover, and at the same time the cylinder 3 205 extends to clamp the battery 500;

[0078] Secondly, the folding tab drive motor 107 rotates to rotate the folding tab clamp 120 to a position where it can clamp the horizontal cover plate, while the folding tab clamp 120 remains in an open state;

[0079] Then, the cylinder 115 extends, driving the folding ear clamp 120 to feed to the working position;

[0080] Then, the tab folding clamping claws 120 clamp the cover plate, and the tab folding driving motor 107 rotates a predetermined angle, such as rotating the cover plate 90 degrees, and the tab folding is completed.

[0081] See also Figure 5 The present invention also provides a combined battery tab bending device, including a battery tab bending device 1000 and a second battery tab bending device 2000. The structure of the second battery tab bending device 2000 is the same as that of the above-mentioned battery tab bending device 1000. The second battery tab bending device 2000 is symmetrically arranged with the battery tab bending device 1000, and is used to bend the tab at the other end of the square battery 500.

[0082] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic inventive concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Clearly, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, to the extent such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to encompass such changes and modifications.

Claims

1. A battery tab bending device, characterized in that: The invention comprises a folding ear assembly (100) and a folding ear workbench (200), wherein the folding ear assembly (100) and the folding ear workbench (200) are arranged in parallel with a predetermined distance; the folding ear assembly (100) comprises a vertical mounting plate assembly (106), a linear guide pair (119) is horizontally arranged on the vertical mounting plate assembly (106), a pair of oppositely arranged folding ear mechanisms (124) are provided on the linear guide pair (119), the folding ear mechanism (124) comprises a cylinder (115), a bearing mounting seat (117), a cylinder (121), a folding ear clamp (120) and a synchronous drive mechanism (125), the cylinder (115) is fixed on the vertical mounting plate assembly (106), the bearing mounting seat (117) is driven by a slider (111) of the linear guide pair (119), and the folding ear mechanism (124) is driven by a slider (111) of the linear guide pair (119). 91) is connected to the guide rail (1192) of the linear guide pair three (119), the piston rod of the cylinder one (115) is connected to the slider (1191), the bearing mounting seat two (117) is provided with a bearing (1171), the cylinder two (121) is connected to the inner ring of the bearing (1171), the folding ear clamp (120) is connected to the cylinder two (121), and is controlled to open and close by the cylinder two (121), and the synchronous drive mechanism (125) drives the cylinder two (121) to rotate at a predetermined angle; the folding ear workbench (200) includes a folding ear workbench cross plate (202), the folding ear workbench cross plate (202) is provided with a cylinder three (205) and a positioning block (203) for clamping the battery, and a battery clamp (204) is provided at the front end of the piston rod of the cylinder three (205).

2. The battery tab bending device according to claim 1, characterized in that : The synchronous drive mechanism (125) includes a folding ear drive motor (107), a first synchronous wheel drive assembly (109), a second synchronous wheel drive assembly (111), a spline shaft (113) and a cylinder connection block (116), wherein the folding ear drive motor (107) is arranged on a side of the vertical mounting plate assembly (106) away from the folding ear mechanism (124), and the spline shaft (113) is arranged below the folding ear mechanism (124) through a bearing mounting seat (114) at both ends. The folding ear drive motor (107) is connected to the first synchronous wheel through the first synchronous wheel. The driving assembly (109) drives the spline shaft (113) to rotate; the spline shaft (113) drives the cylinder 2 (121) to rotate through the second synchronous wheel driving assembly (111); the upper end of the cylinder connecting block (116) is connected to the piston rod of the cylinder 1 (115), and the lower end of the cylinder connecting block (116) is connected to the second synchronous wheel driving assembly (111); the cylinder 1 (115) drives the second synchronous wheel driving assembly (111) to reciprocate on the spline shaft (113) through the cylinder connecting block (116).

3. The battery tab bending device according to claim 1 or 2, characterized in that : It also includes a linear module (103) and a linear guide pair (105), wherein the linear module (103) and the linear guide pair (105) are arranged between the bottom plate (1061) of the vertical mounting plate assembly (106) and the mounting plate (101), and the linear module (103) drives the vertical mounting plate assembly (106) to move back and forth along the linear guide pair (105).

4. The battery tab bending device according to claim 3, characterized in that : It also includes a handwheel adjustment component (102) and a linear guide pair (104), the handwheel adjustment component (102) includes a handwheel (1021) and a screw nut structure (1022), the screw nut structure (1022) and the linear guide pair (104) are arranged below the mounting plate (101), and rotating the handwheel (1021) can make the mounting plate (101) reciprocate on the linear guide pair (104).

5. The battery tab bending device according to claim 1 or 2, characterized in that : It also includes a tensioning mechanism (112), which is composed of a cam follower and a mounting block and is used to adjust the tension of the second synchronous wheel drive assembly (111).

6. The battery tab bending device according to claim 1 or 2, characterized in that : Also included is an adsorption mechanism (208), the adsorption mechanism (208) including a suction cup (2081), a cover plate placement block (209) and a cylinder four (211), the suction cup (2081) is arranged on the upper side of the cover plate placement block (209), the cover plate placement block (209) is connected to the cylinder four (211), and is driven by the cylinder four (211).

7. The battery tab bending device according to claim 1 or 2, characterized in that : It also includes an oil pressure buffer (118) provided on the vertical mounting plate assembly (106) for absorbing the impact kinetic energy of the cylinder (115) during feeding.

8. The battery tab bending device according to claim 1 or 2, characterized in that : It also includes an infrared photoelectric switch (122), which is arranged on the vertical mounting plate assembly (106) and is used to detect the rotation state of the folding ear clamp (120).

9. The battery tab bending device according to claim 1 or 2, characterized in that : It also includes a pair of folding ear workbench vertical plates (201), the folding ear workbench vertical plates (201) are arranged at both ends of the folding ear workbench horizontal plate (202), and a height adjustment block (206) for adjusting the relative height of the folding ear workbench horizontal plate (202) and the folding ear workbench vertical plates (201) is provided between the folding ear workbench horizontal plate (202) and the folding ear workbench vertical plates (201).

10. A battery tab bending device, characterized in that : It comprises a battery pole tab bending device (1000) and a second battery pole tab bending device (2000), the structure of the second battery pole tab bending device (2000) is the same as the structure of the battery pole tab bending device (1000) according to any one of claims 1 to 9, and the second battery pole tab bending device (2000) is symmetrically arranged with the battery pole tab bending device (1000) and is used to bend the pole tab at the other end of the square battery (500).

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