Cover plate buckling device and combined cover plate buckling device

Abstract

The utility model relates to a cover plate buckling device and a combined cover plate buckling device.The cover plate buckling device is used for buckling a cover plate on the end face of a square battery and comprises a mounting plate, a vertical mounting plate assembly is arranged on the mounting plate, a battery bearing assembly is arranged on one side of the vertical mounting plate assembly, and a clamping mechanism is arranged on the battery bearing assembly; a four-corner positioning mechanism is arranged on one side, close to the battery bearing assembly, of the vertical mounting plate assembly, and a temporary clamping mechanism used for temporarily clamping long edges of a cover plate of a battery is arranged between the vertical mounting plate assembly and the battery bearing assembly and close to the battery bearing assembly; a cover plate pressing mechanism for pushing a cover plate of the battery into the four-corner positioning mechanism is arranged between the vertical mounting plate assembly and the battery bearing assembly and close to the vertical mounting plate assembly; a linear module used for driving the vertical mounting plate assembly to move in a reciprocating mode is arranged between the mounting plate and the vertical mounting plate assembly. The utility model has the advantages that the battery cover plate and the battery end face are accurately aligned and tightly buckled.

Description

Technical Field

[0001] The utility model relates to the technical field of production equipment for power batteries, in particular to a cover plate buckling device and a combined cover plate buckling device for buckling cover plates at both ends of a battery. Background Art

[0002] In existing technology, most lithium battery production processes rely on manual or semi-automated methods to fasten the battery cover. Manual operations consume a lot of manpower, result in low production capacity, low efficiency, and high production costs. They can also introduce human factors that affect product quality and yield, while semi-automated methods are inefficient and less adaptable.

[0003] To address the aforementioned issues, Chinese patent document CN 102769114 A discloses an automatic battery tab folding and cover plate fastening device. The disclosed cover plate fastening device utilizes a pair of first clamps on a first finger cylinder to clamp the two sides of the battery. A first push block cylinder controls the first push block to move horizontally toward the battery until the battery cover is pushed against the end of the battery. While this structure of the cover plate fastening device can achieve mechanized automatic cover plate fastening and improve work efficiency, it is prone to misalignment between the battery cover and the battery end surface, resulting in inaccurate cover fastening and the formation of defective batteries. Utility Model Content

[0004] The utility model provides a buckle cover plate device and a combined buckle cover plate device, which have the battery cover plate and the battery end surface accurately aligned and tightly buckled.

[0005] The solution of the present utility model is: to provide a cover plate buckle device for buckling the cover plate of the end face of a square battery, comprising a mounting plate, a vertical mounting plate assembly is provided on the mounting plate, a battery supporting assembly is provided on one side of the vertical mounting plate assembly, a clamping mechanism for clamping and centering the battery is provided on the battery supporting assembly, a four-corner positioning mechanism for positioning the four corners of the battery cover is provided on the side of the vertical mounting plate assembly close to the battery supporting assembly, a temporary clamping mechanism for temporarily clamping the long side of the battery cover is provided between the vertical mounting plate assembly and the battery supporting assembly, a cover pressing mechanism for pushing the battery cover into the four-corner positioning mechanism is provided between the vertical mounting plate assembly and the battery supporting assembly, and a linear module for driving the vertical mounting plate assembly to move back and forth is provided between the mounting plate and the vertical mounting plate assembly.

[0006] As an improvement to the present invention, the clamping mechanism includes a positioning block, a battery clamp and a clamping cylinder. The positioning block is arranged at a predetermined distance from the clamping cylinder, and the battery clamp is arranged on the front end of the piston of the clamping cylinder.

[0007] As an improvement to the present invention, the temporary clamping mechanism includes cylinder 2, which is arranged on the mounting plate. The upper end of the piston rod of cylinder 2 is provided with a pair of cylinders 3 arranged at intervals through a connecting plate, and each of the cylinders 3 drives a cover plate clamp to open or close.

[0008] As an improvement to the present invention, the four-corner positioning mechanism includes a pair of lower positioning cylinders and a pair of upper positioning cylinders arranged opposite to each other, each of the lower positioning cylinders has a lower positioning plate on its top rod that can be driven left and right by the lower positioning cylinder, and lower positioning steps are provided at the relative corners of the lower positioning plate, and the lower positioning steps respectively position the two lower corners of the cover plate; each of the upper positioning cylinders has an upper positioning plate on its top rod that can be driven up and down by the upper positioning cylinder, and upper positioning steps are provided at the relative corners of the upper positioning plate, and the upper positioning steps respectively position the two upper corners of the cover plate.

[0009] As an improvement to the present invention, the cover plate pressing mechanism includes a cover plate, cylinder one and cylinder four, wherein cylinder one is arranged on the mounting base plate of the vertical mounting plate assembly, cylinder four is connected to cylinder one and is driven up and down by cylinder one, and the cover plate is connected to cylinder four and is driven forward and backward by cylinder four.

[0010] As an improvement to the present invention, a positioning step is provided on a side of the cover plate close to the vertical mounting plate assembly.

[0011] As an improvement to the present invention, the present invention also includes a first battery flattening mechanism, which includes cylinder five, cylinder six and a first pressure block. The cylinder five is arranged on the vertical mounting plate assembly, and the cylinder six is connected to the cylinder five and is driven back and forth by the cylinder five; the first pressure block is arranged on the piston rod of the cylinder six and is driven back and forth by the cylinder six.

[0012] As an improvement to the present invention, the present invention also includes a second battery flattening mechanism, which is arranged opposite to the first battery flattening mechanism. The second battery flattening mechanism includes cylinder seven, cylinder eight and a second pressure block. The cylinder seven is arranged on the vertical mounting plate assembly, and the cylinder eight is connected to the cylinder seven and is driven back and forth by the cylinder seven; the second pressure block is arranged on the piston rod of the cylinder eight and is driven back and forth by the cylinder eight.

[0013] As an improvement to the present invention, the present invention also includes a pair of first linear guide pairs and an adjusting handwheel assembly. The pair of first linear guide pairs are arranged at intervals on the lower bottom surface of the mounting plate. The adjusting handwheel assembly is arranged between the pair of first linear guide pairs. The handwheel of the adjusting handwheel assembly is rotated to drive the mounting plate to move back and forth through the screw nut structure of the adjusting handwheel assembly.

[0014] As an improvement to the present invention, a locking mechanism for locking the mounting plate is provided on one side or both sides of the first linear guide pair.

[0015] The present invention also provides a combined buckle cover plate device, comprising a buckle cover plate device and a second buckle cover plate device, wherein the structure of the second buckle cover plate device is the same as that of the above-mentioned buckle cover plate device, and the second buckle cover plate device is symmetrically arranged with the buckle cover plate device and is used for buckling the cover plate on the other end face of the square battery.

[0016] The utility model adopts a method of providing a battery carrying assembly on one side of the vertical mounting plate assembly, a clamping mechanism for clamping and centering the battery on the battery carrying assembly, a four-corner positioning mechanism for positioning the four corners of the battery cover on the side of the vertical mounting plate assembly close to the battery carrying assembly, a temporary clamping mechanism for temporarily clamping the long side of the battery cover is provided between the vertical mounting plate assembly and the battery carrying assembly, and a mechanism for pushing the battery cover into the battery carrying assembly close to the vertical mounting plate assembly. The cover pressing mechanism within the four-corner positioning mechanism; a linear module structure for driving the vertical mounting plate assembly to move back and forth is provided between the mounting plate and the vertical mounting plate assembly. When buckling the cover, the battery is first clamped and positioned by the clamping mechanism, and then the long side of the cover is clamped by the temporary clamping mechanism to stabilize the cover and prevent it from shaking; the four corners of the cover are then positioned by the four-corner positioning mechanism, and the temporary clamping mechanism is returned to its position; the cover pressing mechanism is then used to push the cover until it is tightly attached to the four corner positioning mechanism to ensure the accuracy of the cover position; finally, the linear module is used together with the entire cover assembly to push the cover toward the end face of the battery so that the cover is buckled on the end of the battery. Therefore, the utility model has the advantage of accurate alignment of the battery cover and the battery end face. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural diagram of an embodiment of the utility model.

[0018] Figure 2 yes Figure 1 Schematic diagram of the three-dimensional structure from another perspective (without battery-carrying components).

[0019] Figure 3 yes Figure 1 Schematic diagram of the three-dimensional structure of the battery carrying assembly.

[0020] Figure 4 It 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 3 As shown, Figures 1 to 3 Disclosed is a cover plate device 300 for attaching a cover plate to the end face of a square battery, comprising a mounting plate 301, a vertical mounting plate assembly 306 disposed on the mounting plate 301, a battery carrier assembly 402 disposed on one side of the vertical mounting plate assembly 306, a clamping mechanism 403 disposed on the battery carrier assembly 402 for clamping and centering the battery, a four-corner positioning mechanism 314 disposed on one side of the vertical mounting plate assembly 306 near the battery carrier assembly 402 for positioning the four corners of the battery cover plate, and a battery carrier assembly 402 disposed on the vertical mounting plate assembly 306 near the battery carrier assembly 402. Between 306 and the battery carrying assembly 402, a temporary clamping mechanism 318 for temporarily clamping the long side of the battery cover is provided near the battery carrying assembly 402; between the vertical mounting plate assembly 306 and the battery carrying assembly 402, a cover pressing mechanism 319 for pushing the battery cover into the four-corner positioning mechanism 314 is provided near the vertical mounting plate assembly 306; between the mounting plate 301 and the vertical mounting plate assembly 306, a linear module 303 for driving the vertical mounting plate assembly 306 to move back and forth is provided.

[0023] Preferably, the clamping mechanism 403 includes a positioning block 4031 , a battery clamping plate 4032 and a clamping cylinder 4033 , wherein the positioning block 4031 and the clamping cylinder 4033 are arranged at a predetermined distance, and the battery clamping plate 4032 is arranged on the front end of the piston of the clamping cylinder 4033 .

[0024] Preferably, the temporary clamping mechanism 318 includes a cylinder 2 312, and the cylinder 2 312 is arranged on the mounting plate 301. The upper end of the piston rod of the cylinder 2 312 is provided with a pair of cylinder 3 313 arranged at intervals through a connecting plate 3121, and each of the cylinder 3 313 drives a cover plate clamp 318 to open or close.

[0025] Preferably, the four-corner positioning mechanism 314 includes a pair of lower positioning cylinders 3141 and a pair of upper positioning cylinders 3144 arranged opposite to each other, and each lower positioning cylinder 3141 has a lower positioning plate 3142 on its top rod that can be driven left and right by the lower positioning cylinder 3141, and lower positioning steps 3143 are provided at the opposite corners of the lower positioning plate 3142, and the lower positioning steps 3143 respectively position the two lower corners of the cover plate; each upper positioning cylinder 3144 has an upper positioning plate 3145 on its top rod that can be driven up and down by the upper positioning cylinder 3144, and upper positioning steps 3146 are provided at the opposite corners of the upper positioning plate 3145, and the upper positioning steps 3146 respectively position the two upper corners of the cover plate.

[0026] Preferably, the cover plate pressing mechanism 319 includes a cover plate 3191, a cylinder 1 307 and a cylinder 4 320, the cylinder 1 307 is arranged on the mounting base 3061 of the vertical mounting plate assembly 306, the cylinder 4 320 is connected to the cylinder 1 307 and is driven up and down by the cylinder 1 307, and the cover plate 3191 is connected to the cylinder 4 320 and is driven forward and backward by the cylinder 4 320.

[0027] Preferably, a positioning step is provided on the side of the cover plate 3191 close to the vertical mounting plate assembly 306 .

[0028] When the cover is buckled, the battery 500 is first clamped and positioned with the clamping mechanism 403, and then the long side of the cover (not visible in the figure) of the battery 500 is clamped from bottom to top with the temporary clamping mechanism 318 to stabilize the cover and prevent it from shaking; the four corners of the cover are then positioned with the four corner positioning mechanisms 314, and then the temporary clamping mechanism 318 returns to its original position; the cover pressing mechanism 319 is then used to push the cover into the concave surface formed by the four steps of the four corner positioning mechanisms 314, and the cover is pressed against the concave surface to ensure the position of the cover. The initial position accuracy of the battery is ensured; the linear module 303 with a pre-set moving distance is used together with the entire cover assembly to push the cover toward the end face of the battery so that the cover is buckled onto the end of the battery; when the battery 500 is moved from the previous process to the battery carrier assembly 402, the end face of the battery 500 is ensured to be in the predetermined position. After the battery 500 is in place, the clamping mechanism 403 is used to clamp the battery 500 to ensure that the end face of the battery 500 is not moved. In this way, the cover can be buckled onto the end face of the battery 500. Therefore, the present invention has the advantages of accurate positioning of the battery cover and the battery end face and a tight buckling.

[0029] Preferably, the present invention further includes a first battery flattening mechanism 316, which includes a fifth cylinder 3161, a sixth cylinder 3162, and a first pressure block 3163. The fifth cylinder 3161 is mounted on the vertical mounting plate assembly 306, and the sixth cylinder 3162 is connected to the fifth cylinder 3161 and is driven to reciprocate left and right by the fifth cylinder 3161. The first pressure block 3163 is mounted on the piston rod of the sixth cylinder 3162 and is driven to reciprocate up and down by the sixth cylinder 3162. The first battery flattening mechanism 316 flattens the battery 500 from one side. If a larger first pressure block 3163 is used in the center of the battery, the present invention only requires the first battery flattening mechanism 316.

[0030] To ensure the reliability of the battery, the present invention also includes a second battery flattening mechanism 317, which is arranged opposite the first battery flattening mechanism 316. The second battery flattening mechanism 317 includes a cylinder 7 3171, a cylinder 8 3172, and a second pressure block 3173. The cylinder 7 3171 is arranged on the vertical mounting plate assembly 306, and the cylinder 8 3172 is connected to the cylinder 7 3171 and is driven by the cylinder 7 3171 to reciprocate left and right. The second pressure block 3173 is arranged on the piston rod of the cylinder 8 3172 and is driven by the cylinder 8 3172 to reciprocate up and down. The second battery flattening mechanism 317 and the first battery flattening mechanism 316 are oppositely pressed on the upper surface of the battery 500. This dual battery flattening mechanism is suitable for use with wider batteries.

[0031] Preferably, the present invention further includes a pair of first linear guide rails 304 and an adjustment handwheel assembly 302. The pair of first linear guide rails 304 are spaced apart on the lower surface of the mounting plate 301, and the adjustment handwheel assembly 302 is disposed between the pair of first linear guide rails 304. Rotating the handwheel 3021 of the adjustment handwheel assembly 302 drives the mounting plate 301 to reciprocate back and forth via the screw nut structure 3022 of the adjustment handwheel assembly 302, thereby adjusting the distance between batteries 500 of different lengths.

[0032] Preferably, a locking mechanism 311 for locking the mounting plate 301 is provided on one or both sides of the first linear guide rail pair 304. After the adjusting hand wheel assembly 302 has adjusted its position, the locking mechanism 311 is used to position it.

[0033] Specifically, in the present invention, the cover plate buckling device 300 is used to buckle the cover plate;

[0034] The mounting plate 301 is used to mount various components of the buckle cover plate;

[0035] The hand wheel assembly 302 is used to adjust the distance between the buckle cover assembly at both ends of the battery to adapt to batteries of different lengths;

[0036] The linear module 303 is used to complete the feeding or retreating of the battery in the length direction when performing the cover plate buckling action;

[0037] Linear guide pair 304, used to adapt to batteries of different lengths and adjust the distance between the buckle cover plate assemblies;

[0038] The second linear guide rail pair 305 is used to guide the battery forward or backward in the length direction when performing the cover plate buckling action;

[0039] Vertical mounting plate assembly 306, used for assembling and fixing, performing the assembly of the cover plate;

[0040] Cylinder 1 307, the lifting cylinder of the top ear piece when the cover plate is buckled;

[0041] The pressure regulating valve 308 is used to regulate and monitor the air pressure of the cylinder at the key position of the cover plate mechanism;

[0042] Solenoid valve group 309, a solenoid valve assembly for controlling all cylinders in the cover plate mechanism;

[0043] Pointer 310, in conjunction with scale plate 3101, is used to indicate the position scale of the buckle cover assembly;

[0044] The locking mechanism 311 is used to lock the position of the fixture after adjusting the position of the buckle cover assembly;

[0045] Cylinder 2 312, the lifting cylinder of the cover plate clamping claw when the cover plate is buckled;

[0046] Cylinder 3 313, clamping cylinder for clamping cover plate jaws when buckling cover plate;

[0047] The lower side positioning cylinder 314 is used to position and clamp the cover plate when the cover plate is buckled;

[0048] Upper side positioning cylinder 315, when the cover is buckled, the upper side positioning and clamping of the cover;

[0049] The first battery flattening structure 316 comprises a fifth cylinder 3161, a sixth cylinder 3162 and a first pressing block 3163, and is a power cylinder that extends and contracts laterally when the cover plate is buckled and the cover plate buckling workbench (400) presses the battery body;

[0050] The second battery flattening structure 317 comprises a seventh cylinder 3171, an eighth cylinder 3172 and a second pressing block 3173, which is a power cylinder that presses down the cover plate workbench (400) when pressing the battery body when the cover plate is buckled;

[0051] The cover plate clamping claw 318 is used to clamp the cover plate before buckling the cover plate.

[0052] The cover plate pressing mechanism 319 includes a cover plate pressing block 3191, which is used to press the cover plate in the early stage when the cover plate is buckled.

[0053] Cylinder four 320 is connected to cylinder one 307 and is driven up and down by cylinder one 307. The cover plate 3191 is connected to cylinder four 320 and is driven forward and backward by cylinder four 320.

[0054] The second cover plate device 400 has the same structure as the cover plate device 300 and is symmetrically arranged with the cover plate device 300;

[0055] The vertical plate 401 of the buckle cover plate workbench is used to support and install the load-bearing plate of the buckle cover plate workbench;

[0056] Battery carrying assembly 402, used for supporting and installing the buckle cover plate workbench;

[0057] The clamping mechanism 403 is used to clamp the battery 500;

[0058] Positioning block 4031, used to clamp the battery in place when the cover is buckled;

[0059] The battery clamping plate 4032 cooperates with the positioning block 4031 to clamp the battery 500;

[0060] The clamping cylinder 4033 is used to provide power for clamping the battery when folding the tabs;

[0061] The buckle cover plate workbench cross plate 404 is used to support and install the crossbeam plate of the buckle cover plate workbench;

[0062] Junction box 405 is an electrical connection box used for collecting and controlling the circuits of the cover plate workbench.

[0063] When the utility model is used, Figure 1-Figure 4 As shown: the battery after the tab is folded is moved from the tab folding platform to the top of the cover plate device 300 using a specific moving clamp to wait;

[0064] First, retract the cylinders in the first battery flattening structure 316 and the second battery flattening structure 317 to avoid the battery placement position. Retract the cylinder 2 312, cylinder 3 313, lower positioning cylinder 314, and upper positioning cylinder 315 to avoid the cover plate discharge position.

[0065] Secondly, a specific clamp is used to place the battery body on the horizontal plate 404 of the cover workbench, and the clamping cylinder 4033 extends to clamp the battery 500. At the same time, the second cylinder 312 extends to place the cover after the folded ear is completed in the cover clamp 318, and the third cylinder 313 clamps it, and the cover clamp 318 covers the cover.

[0066] Next, the lower positioning cylinder 314 and the upper positioning cylinder 315 extend to clamp the cover plate, after which cylinder three 313 releases and cylinder two 312 retracts, changing the clamping method of the cover plate. Then cylinder one 307 retracts to hold the tab.

[0067] Then, the linear module 303 drives the cover plate assembly 300, moving both sides toward the battery 500. At the same time, the cylinder 1 307 extends, and the top ear piece descends until the battery cover is completely engaged with the end of the battery 500. The cover plate buckling process is completed.

[0068] See Figure 4 The present invention also provides a combined buckle cover plate device, including a buckle cover plate device 300 and a second buckle cover plate device 400. The structure of the second buckle cover plate device 400 is the same as that of the above-mentioned buckle cover plate device 300. The second buckle cover plate device 400 is symmetrically arranged with the buckle cover plate device 300 and is used to buckle the cover plate on the other end face of the square battery 500.

[0069] 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 cover plate device for attaching a cover plate to the end face of a square battery, characterized in that: The invention comprises a mounting plate (301), a vertical mounting plate assembly (306) is provided on the mounting plate (301), a battery carrying assembly (402) is provided on one side of the vertical mounting plate assembly (306), a clamping mechanism (403) for clamping and centering the battery is provided on the battery carrying assembly (402), a four-corner positioning mechanism (314) for positioning the four corners of the battery cover is provided on one side of the vertical mounting plate assembly (306) close to the battery carrying assembly (402), and a battery cover is provided between the vertical mounting plate assembly (306) and the battery carrying assembly (402). ), a temporary clamping mechanism (318) for temporarily clamping the long side of the battery cover is provided near the battery supporting assembly (402); between the vertical mounting plate assembly (306) and the battery supporting assembly (402), a cover pressing mechanism (319) for pushing the battery cover into the four-corner positioning mechanism (314) is provided near the vertical mounting plate assembly (306); and a linear module (303) for driving the vertical mounting plate assembly (306) to move back and forth is provided between the mounting plate (301) and the vertical mounting plate assembly (306).

2. The cover plate device according to claim 1, characterized in that The clamping mechanism (403) comprises a positioning block (4031), a battery clamping plate (4032) and a clamping cylinder (4033), wherein the positioning block (4031) and the clamping cylinder (4033) are arranged at a predetermined distance, and the battery clamping plate (4032) is arranged on the front end of the piston of the clamping cylinder (4033).

3. The cover plate buckle device according to claim 1 or 2, characterized in that : The temporary clamping mechanism (318) includes a cylinder 2 (312), and the cylinder 2 (312) is arranged on the mounting plate (301). The upper end of the piston rod of the cylinder 2 (312) is provided with a pair of cylinder 3 (313) arranged at intervals through a connecting plate (3121). Each of the cylinder 3 (313) drives a cover plate clamp (318) to open or close.

4. The cover plate buckle device according to claim 1 or 2, characterized in that The four-corner positioning mechanism (314) comprises a pair of lower positioning cylinders (3141) and a pair of upper positioning cylinders (3144) arranged opposite to each other, wherein a lower positioning plate (3142) which can be driven left and right by the lower positioning cylinder (3141) is provided on the top rod of each lower positioning cylinder (3141), and a lower positioning step (3143) is provided at the opposite corner of the lower positioning plate (3142), and the lower positioning step (3143) respectively positions the two lower corners of the cover plate; and an upper positioning plate (3145) which can be driven up and down by the upper positioning cylinder (3144) is provided on the top rod of each upper positioning cylinder (3144), and an upper positioning step (3146) is provided at the opposite corner of the upper positioning plate (3145), and the upper positioning step (3146) respectively positions the two upper corners of the cover plate.

5. The cover plate buckle device according to claim 1 or 2, characterized in that : The cover plate pressing mechanism (319) includes a cover plate (3191), a cylinder one (307) and a cylinder four (320), wherein the cylinder one (307) is arranged on the mounting base (3061) of the vertical mounting plate assembly (306), the cylinder four (320) is connected to the cylinder one (307) and is driven up and down by the cylinder one (307), and the cover plate (3191) is connected to the cylinder four (320) and is driven forward and backward by the cylinder four (320).

6. The cover plate buckle device according to claim 1 or 2, characterized in that : Also included is a first battery flattening mechanism (316), the first battery flattening mechanism (316) includes a cylinder five (3161), a cylinder six (3162) and a first pressing block (3163), the cylinder five (3161) is arranged on the vertical mounting plate assembly (306), the cylinder six (3162) is connected to the cylinder five (3161), and is driven to move back and forth by the cylinder five (3161); the first pressing block (3163) is arranged on the piston rod of the cylinder six (3162), and is driven to move back and forth by the cylinder six (3162).

7. The cover plate device according to claim 6, characterized in that : It also includes a second battery flattening mechanism (317), which is arranged opposite to the first battery flattening mechanism (316). The second battery flattening mechanism (317) includes a cylinder seven (3171), a cylinder eight (3172) and a second pressing block (3173). The cylinder seven (3171) is arranged on the vertical mounting plate assembly (306), and the cylinder eight (3172) is connected to the cylinder seven (3171) and is driven to reciprocate left and right by the cylinder seven (3171); the second pressing block (3173) is arranged on the piston rod of the cylinder eight (3172) and is driven to reciprocate up and down by the cylinder eight (3172).

8. The cover plate buckle device according to claim 1 or 2, characterized in that : It also includes a pair of first linear guide rails (304) and an adjusting handwheel assembly (302), wherein the pair of first linear guide rails (304) are spaced apart and arranged on the lower bottom surface of the mounting plate (301), and the adjusting handwheel assembly (302) is arranged between the pair of first linear guide rails (304). The handwheel (3021) of the adjusting handwheel assembly (302) is rotated to drive the mounting plate (301) to move back and forth through the screw nut structure (3022) of the adjusting handwheel assembly (302).

9. The cover plate buckle device according to claim 8, characterized in that A locking mechanism (311) for locking the mounting plate (301) is provided on one or both sides of the first linear guide rail pair (304).

10. A combined buckle cover device, characterized in that : It comprises a buckle cover plate device (300) and a second buckle cover plate device (400), the structure of the second buckle cover plate device (400) is the same as the structure of the buckle cover plate device (300) described in any one of claims 1 to 9, and the second buckle cover plate device (400) is symmetrically arranged with the buckle cover plate device (300) and is used for buckling the cover plate on the other end face of the square battery (500).

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