Battery cover plate supporting mechanism and torque welding equipment

Abstract

The utility model belongs to battery manufacturing technical field discloses a kind of battery cover plate supporting mechanism and torque welding equipment, battery cover plate supporting mechanism is used for battery welding equipment, battery cover plate supporting mechanism includes support seat and anti-rotation seat, support seat is equipped with accommodating groove, the bottom wall of accommodating groove is equipped with perforation, accommodating groove is used to accommodate battery cover plate, anti-rotation seat is installed in perforation, anti-rotation seat has the anti-rotation support surface in the inside of perforation, and the anti-rotation support surface is stopped on the pole of battery cover plate.This battery cover plate supporting mechanism can well support battery cover plate, and the probability of the rotation of pole on battery cover plate can be reduced, the stability of pole is ensured, so as to be favorable to the welding yield of the pole tab of battery cell.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and in particular to a battery cover plate support mechanism and torque welding equipment. Background Technology

[0002] Torque welding achieves a composite connection of fastening and welding by controlling the tightening torque. The torque welding process is simple, produces a high degree of strength, and generates relatively little debris. Due to its excellent performance, torque welding can be used to connect the terminals and cell tabs on battery covers. Specifically, the cell is tilted, and its multi-layered tabs are placed on top of the terminals on the battery cover. The tabs are then welded together by rotating the welding head. During welding, the battery cover must be kept fixed, and force must be applied to the tabs. Existing battery cover support structures are typically designed for laser welding equipment and cannot provide anti-rotation functionality for the terminals. Therefore, a special battery cover support mechanism needs to be designed to match torque welding equipment. Utility Model Content

[0003] One aspect of this utility model provides a battery cover support mechanism, which can effectively support the battery cover and reduce the probability of rotation of the terminals on the battery cover, ensuring the stability of the terminals, thereby improving the welding yield of the battery cell's tabs and terminals.

[0004] To achieve this objective, the present invention adopts the following embodiments:

[0005] A battery cover support mechanism is provided for use in battery welding equipment. The battery cover support mechanism includes: a support base with a receiving groove and a through hole on the bottom wall of the receiving groove for receiving a battery cover; and an anti-rotation seat installed in the through hole, the anti-rotation seat having an anti-rotation support surface located inside the through hole, the anti-rotation support surface abutting against the terminal post of the battery cover.

[0006] The beneficial effects of the battery cover support mechanism of this utility model are as follows: In actual operation, after the battery cover is installed on the support base, the battery cover is accommodated in the receiving groove. The receiving groove can limit the battery cover to prevent it from shaking relative to the support base. Since there is a through hole on the bottom wall of the receiving groove, and an anti-rotation seat is installed in the through hole, when the battery cover is accommodated in the receiving groove, the terminal post of the battery cover fits inside the through hole and abuts against the anti-rotation seat. Since the anti-rotation seat has an anti-rotation support surface located inside the through hole, the anti-rotation seat can support the terminal post of the battery cover on the one hand, ensuring the stability of the terminal post, and on the other hand, prevent the terminal post from rotating when the welding head drives the battery cell's tab to rotate during torque welding, thereby improving the welding quality of the battery cell's tab and the battery cover's terminal post.

[0007] Another aspect of this utility model provides a torque welding device that can reduce the probability of the terminal junction on the battery cover rotating during the welding process, ensuring the stability of the terminal, thereby improving the welding yield of the battery cell's tab and terminal.

[0008] To achieve this objective, the present invention adopts the following embodiments:

[0009] A torque welding device includes a welding host, a cell support mechanism, and the aforementioned battery cover support mechanism. The battery cover support mechanism and the cell support mechanism are arranged side by side. The welding host is located above the battery cover support mechanism and has a rotatable and liftable welding head.

[0010] The advantages of this torque welding equipment are as follows: In actual operation, the battery cover is first installed on the battery cover support mechanism, and then the battery cell is installed on the battery cell support mechanism, so that the multi-layer tabs of the battery cell are all abutted against the terminals on the battery cover. Then, the welding host drives the welding head to descend and abut against the tabs. Next, the welding host drives the welding head to rotate to achieve torque welding of the multi-layer tabs and terminals. Since the battery cover support mechanism has a support seat for supporting the battery cover and an anti-rotation seat to prevent the terminals from rotating, it ensures that the terminals remain fixed during the rotation of the welding head, which is beneficial to improving the welding quality of the terminals and tabs.

[0011] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the battery cover support mechanism according to an embodiment of the present utility model;

[0013] Figure 2 yes Figure 1 A magnified diagram showing point A;

[0014] Figure 3 This is a schematic diagram of the cooperation structure between the battery cover support mechanism and the battery cover in an embodiment of this utility model.

[0015] Figure 4 This is a partial structural schematic diagram of the battery cover support mechanism according to an embodiment of the present utility model;

[0016] Figure 5 This is a schematic diagram of the structure of the torque welding equipment according to an embodiment of the present utility model;

[0017] Figure 6 This is a schematic diagram of the welding head of this utility model.

[0018] Figure label:

[0019] 100. Battery cover support mechanism; 110. Support base; 111. Receiving groove; 112. Perforation; 1121. First hole section; 1122. Second hole section; 113. Contouring groove; 114. Clearance groove; 120. Anti-rotation seat; 121. Connecting part; 122. Anti-rotation part; 1221. Anti-rotation support surface; 12211. Protrusion; 130. Support base; 131. Portal structure; 132. Support column; 140. Clamping assembly; 141. Clamping drive component; 1411. Clamping drive seat; 1412. Clamping guide seat; 1413. Operating wrench; 1414. Guide column; 142. Clamping block; 1421. Clearance hole; 200. Cell support mechanism; 300. Welding host; 310. Welding head; 311. Frustum protrusion; 312. Hemispherical protrusion;

[0020] 10. Battery cover; 101. Terminal post; 20. Battery cell; 201. Tab. Detailed Implementation

[0021] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] In the description of this embodiment, the terms "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0023] This utility model provides a battery cover support mechanism 100. First, it should be noted that a battery typically includes three parts: a battery cell 20, a battery cover 10, and a housing. One end of the housing is open, and the battery cover 10 is fastened to the open end of the housing. The battery cell 20 is installed inside the housing. The battery cover 10 typically includes a top cover plate, a terminal post 101, an upper plastic part, a lower plastic part, and a sealing element. The terminal post 101 passes through the top cover plate. The upper plastic part and the lower plastic part are respectively connected to the upper and lower sides of the top cover plate. The sealing element is sleeved on the terminal post 101. The upper plastic part, the lower plastic part, and the sealing element can all achieve isolation between the terminal post 101 and the top cover plate. The battery cell 20 is typically manufactured using a stacking or winding process involving a positive electrode sheet, a separator, and a negative electrode sheet. The formed battery cell 20 has a positive electrode tab 201 and a negative electrode tab 201. The positive electrode tab 201 needs to be welded to the positive electrode post 101 on the battery cover plate 10, and the negative electrode tab 201 needs to be welded to the negative electrode post 101 on the battery cover plate 10. The battery cover plate support mechanism 100 provided by this utility model is a structure used to support the battery cover plate 10 during the welding of the electrode post 101 on the battery cover plate 10 and the electrode tab 201 of the battery cell 20.

[0024] refer to Figure 1 As shown, the battery cover support mechanism 100 includes a support base 110 and an anti-rotation seat 120. The support base 110 has a receiving groove 111, and the bottom wall of the receiving groove 111 has a through hole 112. The receiving groove 111 is used to receive the battery cover 10. The anti-rotation seat 120 is installed in the through hole 112 and has an anti-rotation support surface 1221 located inside the through hole 112. The anti-rotation support surface 1221 abuts against the terminal post 101 of the battery cover 10. It can be understood that in actual operation, referring to... Figure 3 As shown, when the battery cover 10 is installed on the support base 110, the battery cover 10 is accommodated in the receiving groove 111. The receiving groove 111 can limit the battery cover 10 to prevent it from shaking relative to the support base 110. Since the bottom wall of the receiving groove 111 is provided with a through hole 112, and an anti-rotation seat 120 is installed in the through hole 112, when the battery cover 10 is accommodated in the receiving groove 111, the terminal post 101 of the battery cover 10 is engaged inside the through hole 112, and prevents it from shaking. The anti-rotation seat 120 has an anti-rotation support surface 1221 located inside the perforation 112. On the one hand, the anti-rotation seat 120 can support the terminal post 101 of the battery cover plate 10 to ensure the stability of the terminal post 101. On the other hand, it can prevent the terminal post 101 from rotating when the welding head 310 drives the tab 201 of the cell 20 to rotate during the torque welding process, thereby improving the welding quality of the tab 201 of the cell 20 and the terminal post 101 of the battery cover plate 10.

[0025] Optionally, the through hole 112 is a circular hole. The welding head 310 of the welding host 300 is usually cylindrical. Setting the through hole 112 as a circular hole makes it easier for the welding head 310 to pass through.

[0026] Optionally, the battery cover 10 is typically provided with a protruding explosion-proof valve, and the receiving groove 111 is also provided with a contoured groove 113 to accommodate the explosion-proof valve. This allows the battery cover 10 to fit tightly against the receiving groove 111 when it is placed on the support base 110, thereby helping to ensure the stability of the battery cover 10. Further optionally, the depth of the receiving groove 111 is substantially the same as the thickness of the battery cover 10, and the length and width dimensions of the receiving groove 111 are substantially the same as the length and width dimensions of the battery cover 10. This further improves the stability of the battery cover 10 on the support base 110.

[0027] Optional, see reference Figure 2 As shown, the anti-rotation support surface 1221 is provided with multiple protrusions 12211. It can be understood that providing multiple protrusions 12211 on the anti-rotation support surface 1221 can increase the static friction between the anti-rotation seat 120 and the terminal post 101, thereby ensuring that the terminal post 101 is prevented from rotating when the welding head 310 drives the tab 201 of the cell 20 to rotate during the torsion process, which is beneficial to improving the welding quality of the tab 201 of the cell 20 and the terminal post 101 of the battery cover plate 10.

[0028] Alternatively, the multiple protrusions 12211 may be arranged in multiple rows and columns or in a circular array. It is understood that a regular arrangement of the protrusions 12211 on the anti-rotation support surface 1221 facilitates processing and manufacturing. Even more optionally, the protrusions 12211 may cover the entire anti-rotation support surface 1221, thereby further increasing the static friction between the anti-rotation seat 120 and the pole post 101, ensuring the anti-rotation function of the anti-rotation seat 120 on the pole post 101.

[0029] Further optionally, the protrusion 12211 includes at least one of a prism protrusion, a hemispherical protrusion, a pyramidal protrusion, a conical protrusion, and a frustum protrusion. It should be noted that in embodiments of this invention, the shapes of multiple protrusions 12211 can be identical or different. When the shapes of the protrusions 12211 are completely different, protrusions 12211 with various structures can be arranged radially along the anti-rotation support surface 1221. In other embodiments of this invention, the structure of the protrusion 12211 can be selected according to actual needs and is not limited to the above limitations.

[0030] Optionally, the area of ​​the anti-rotation support surface 1221 is not less than one-third of the area of ​​the perforation 112. This ensures the anti-rotation function of the anti-rotation seat 120 on the pole post 101. The area of ​​the anti-rotation support surface 1221 can be half the area of ​​the perforation 112, three-quarters, or two-thirds of the perforation 112, or other values ​​can be selected according to actual needs.

[0031] Optional, see reference Figure 2 As shown, the support base 110 is also provided with a relief groove 114. The relief groove 114 and the receiving groove 111 are respectively provided on two side walls of the support base 110 that are opposite to each other along its thickness direction. The relief groove 114 is connected to the through hole 112. The anti-rotation base 120 includes a connecting part 121 and an anti-rotation part 122. The connecting part 121 is received in the relief groove 114, and the anti-rotation part 122 is received in the through hole 112. It is understandable that a clearance groove 114 is provided on the support base 110, and the clearance groove 114 is provided corresponding to the through hole 112. An anti-rotation support surface 1221 is provided on the anti-rotation part 122 to support the pole post 101 and restrict the rotation of the pole post 101. The connecting part 121 is accommodated in the clearance groove 114. In the thickness direction of the support base 110, the anti-rotation seat 120 and the support base 110 share a part of the space, reducing the total thickness of the entire support base 110 and the anti-rotation seat 120. This is beneficial to reducing the thickness dimension of the entire battery cover support mechanism 100, thereby reducing the footprint of the battery cover support mechanism 100.

[0032] Optionally, the perforation 112 includes a first hole segment 1121 and a second hole segment 1122. The diameter of the first hole segment 1121 is smaller than the diameter of the second hole segment 1122. The anti-rotation support surface 1221 protrudes from the stepped surface formed by the first hole segment 1121 and the second hole segment 1122. It is understood that the perforation 112 is formed as a stepped hole, including the first hole segment 1121 and the second hole segment 1122. The pole post 101 is accommodated within the second hole segment 1122, and the anti-rotation part 122 is accommodated within the first hole segment 1121. The anti-rotation support surface 1221 protrudes from the stepped surface formed by the first hole segment 1121 and the second hole segment 1122, which allows the middle part of the pole post 101 to be supported by the anti-rotation support surface 1221, thus improving the anti-rotation effect of the anti-rotation seat 120 on the pole post 101.

[0033] Optionally, the battery cover support mechanism 100 also includes a support base 130, on which both the support seat 110 and the anti-rotation seat 120 are mounted. It is understood that the added support base 130 allows the battery cover support mechanism 100 to maintain a certain height, ensuring that the height of the battery cover support mechanism 100 matches the height of the cell support mechanism 200, thus guaranteeing a stable height match between the battery cover 10 and the cell 20 during the welding process.

[0034] Optionally, the support base 110 is connected to the support base 130 via a first connecting bolt (not shown). It is understood that using the first connecting bolt to connect the support base 110 and the support base 130 facilitates both the connection and assembly. Even more optionally, multiple first connecting bolts are used, located at both ends of the support base 110 along its length, thereby improving the connection stability of the support base 110.

[0035] Optionally, the anti-rotation seat 120 is connected to the support base 130 via a second connecting bolt (not shown). It is understood that connecting the anti-rotation seat 120 to the support base 130 via the second connecting bolt facilitates both the connection and assembly. Even more optionally, multiple second connecting bolts are used, spaced apart circumferentially along the anti-rotation seat 120, thereby improving the connection stability of the support base 110. Even more optionally, the support base 130 has a groove for mounting the anti-rotation seat 120. This groove strengthens the restraint on the anti-rotation seat 120, ensuring that the anti-rotation seat 120 does not rotate relative to the support base 130.

[0036] It should be noted that in other embodiments of this utility model, the support base 110 and the support base 130 may be connected in other ways as needed, such as snap-fit ​​connection, welding, etc., and are not limited to the above description.

[0037] Optionally, the support base 130 includes a portal frame structure 131 and a support column 132. The support seat 110 and the anti-rotation seat 120 are mounted on the portal frame structure 131, and the support column 132 is connected to the portal frame structure 131. It is understood that the portal frame structure 131 can stably support the support seat 110 and the anti-rotation seat 120, which helps ensure the stability of the battery cover 10, thereby improving the welding yield of the terminal post 101 of the battery cover 10 and the electrode tab 201 of the cell 20. The portal frame structure 131 and the support column 132 can be connected by bolts, welding, snap-fit ​​connections, or other methods.

[0038] Optional, see reference Figure 4As shown, the battery cover support mechanism 100 also includes a clamping assembly 140, which includes a clamping drive 141 and a clamping block 142. The clamping drive 141 is mounted on the support base 110, and one end of the clamping drive 141 abuts against the clamping block 142. The clamping block 142 abuts against the battery cover 10, and the clamping block 142 is provided with a clearance hole 1421, which corresponds to the terminal post 101 on the battery cover 10. It can be understood that during the welding process, after the battery cover 10 is installed in the receiving groove 111, the clamping block 142 is installed on the support base 110, and the clamping drive 141 is operated to drive the clamping block 142 to move, so that the clamping block 142 is stably pressed against the battery cover 10, ensuring the stability of the battery cover 10, thereby improving the welding yield of the tab 201 and the terminal post 101 of the cell 20. In addition, the clamping block 142 is also provided with a clearance hole 1421, which is correspondingly set with the pole post 101. During the welding process, the welding head 310 needs to pass through the clearance hole 1421 and stop against the pole post 101. The clearance hole 1421 can restrict and guide the welding head 310, thereby helping to improve the welding yield.

[0039] Alternatively, the clamping block 142 can be fixed to the support base 110 by means of bolt connection or snap connection.

[0040] Optionally, the clamping drive 141 includes a clamping drive seat 1411, a clamping guide seat 1412, an operating wrench 1413, and a guide post 1414. The clamping drive seat 1411 is mounted on the support seat 110, and the connection method can be bolted, snap-fit, or welded. The clamping guide seat 1412 is mounted on the clamping drive seat 1411, and the connection method can be bolted, snap-fit, or welded. The clamping guide seat 1412 has a vertically arranged guide hole, and the guide post 1414 is slidably disposed in the guide hole. The operating wrench 1413 is rotatably connected to the clamping drive seat 1411 and the guide post 1414. It is understood that after the battery cover 10 is installed in the receiving groove 111, the clamping block 142 is installed on the support base 110, and then the operating wrench 1413 is rotated clockwise (or counterclockwise in other embodiments). During the rotation of the operating wrench 1413, the guide post 1414 can be driven to slide downward in the guide hole, so that the guide post 1414 is pressed against the clamping block 142, thereby achieving the clamping of the battery cover 10. This structure of clamping the battery cover 10 by rotating the operating wrench 1413 is very simple to operate and convenient for users.

[0041] This utility model also provides a torque welding device, see reference. Figure 5As shown, it includes a welding host 300, a cell support mechanism 200 and the battery cover support mechanism 100 mentioned above. The battery cover support mechanism 100 and the cell support mechanism 200 are arranged side by side, and the welding host 300 is located above the battery cover support mechanism 100. Understandably, in actual operation, the battery cover 10 is first installed onto the battery cover support mechanism 100, and then the battery cell 20 is installed onto the battery cell support mechanism 200, so that the multi-layer tabs 201 of the battery cell 20 all abut against the terminal posts 101 on the battery cover 10. Then, the welding host 300 drives the welding head 310 to descend and abut against the tabs 201. Next, the welding host 300 drives the welding head 310 to rotate to achieve torque welding between the multi-layer tabs 201 and the terminal posts 101. Since the battery cover support mechanism 100 has a primary support seat 110 for supporting the battery cover 10 and an anti-rotation seat 120 to prevent the terminal posts 101 from rotating, it ensures that the terminal posts 101 remain fixed during the rotation of the welding head 310, which is beneficial to improving the welding quality of the terminal posts 101 and the tabs 201.

[0042] It should be noted that in this embodiment, the cell support mechanism 200 is a structure capable of tilting and supporting the cell 20. This can be selected based on existing technology, and the specific structure of the cell support mechanism 200 is not limited here. The torque welding equipment should also include a control module for controlling the welding host 300. The control module can be a PLC controller or a control chip, depending on actual needs. The specific control process of the torque welding equipment is not limited here.

[0043] Optionally, there are two cell support mechanisms 200, with the battery cover support mechanism 100 located between the two cell support mechanisms 200. This allows for the welding of one battery cover 10 to two battery cells 20, which improves work efficiency.

[0044] Optionally, the welding head 310 is positioned opposite to the through hole 112. Therefore, in actual operation, the welding head 310 only needs to be raised and lowered in the vertical direction, without requiring adjustment in the front-back or left-right directions. This simplifies the drive structure on the welding host 300 and helps reduce manufacturing costs.

[0045] Optional, see reference Figure 6As shown, the end of the welding head 310 is provided with multiple hemispherical protrusions 312 and multiple frustum protrusions 311. Along the radial direction of the welding head 310, the multiple hemispherical protrusions 312 are located radially outside the multiple frustum protrusions 311. It can be understood that since the connection principle of torque welding is that torque welding achieves a composite connection of fastening and welding by controlling the tightening torque, the welding head 310 needs to have sufficient friction with the tab 201 to improve the strength of the weld. In this embodiment, the welding head 310 is provided with frustum protrusions 311 inside and hemispherical protrusions 312 on the outer ring. On the one hand, this can improve the friction between the welding head 310 and the tab 201, thereby improving the connection stability between the tab 201 and the terminal post 101 of the battery cover 10. On the other hand, the smoother outer protrusions can better reduce the occurrence of the tab 201 being torn. It should be noted that the cross-section of the frustum protrusion 311 in this embodiment can be a triangle, a quadrilateral, or a polygon with more than four sides. The actual cross-section of the frustum protrusion 311 can be selected according to actual needs.

[0046] Optionally, the draft angle of the frustum protrusion 311 is 5°-10°. More specifically, the draft angle of the frustum protrusion 311 can be 5°, 6°, 7°, 8°, 9°, or 10°, or other values ​​within the range of 5°-10°. A draft angle that is too small or too large is detrimental to increasing the static friction between the welding head 310 and the frustum protrusion 311. Of course, the draft angle of the frustum protrusion 311 can be selected according to actual needs and is not limited to the above description.

[0047] Optionally, the multiple frustum protrusions 311 are arranged in multiple rows and columns. It is understood that this arrangement ensures a more uniform force is applied to the tab 201 during the rotation of the welding head 310, which improves the welding uniformity between the tab 201 of the cell 20 and the terminal post 101 of the battery cover 10, thereby enhancing the connection strength between the tab 201 and the terminal post 101. Of course, in other embodiments of this invention, the multiple frustum protrusions 311 can also be arranged in a circumferential array, depending on actual needs.

[0048] Optionally, multiple hemispherical protrusions 312 are evenly spaced along the circumference of the welding head 310. Understandably, the evenly spaced hemispherical protrusions 312 apply a more uniform force to the tab 201 during the rotation of the welding head 310, which helps improve the welding uniformity between the tab 201 of the cell 20 and the terminal post 101 of the battery cover 10, thereby enhancing the connection strength between the tab 201 and the terminal post 101.

[0049] Alternatively, the end face of the frustum protrusion 311 is flush with the tangent at the highest point of the surface of the hemispherical protrusion 312. Thus, during actual operation, the frustum protrusion 311 and the hemispherical protrusion 312 can simultaneously abut against the tab 201 of the battery cell 20, thereby improving the welding strength between the tab 201 of the battery cell 20 and the terminal post 101 of the battery cover plate 10.

[0050] Alternatively, the total area of ​​the large end face of the frustum protrusion 311 and the circular face of the hemispherical protrusion 312 is at least greater than 75% of the cross-sectional area of ​​the welding head 310. This can further increase the friction between the welding head 310 and the tab 201, and improve the welding strength between the tab 201 of the cell 20 and the terminal post 101 of the battery cover plate 10.

[0051] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0052] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery cover plate support mechanism characterized by, The battery cover support mechanism is used in battery welding equipment, and the battery cover support mechanism includes: A support base is provided with a receiving groove, and a through hole is provided on the bottom wall of the receiving groove, which is used to receive a battery cover plate; An anti-rotation bracket is installed in the through hole and has an anti-rotation support surface located inside the through hole, which abuts against the terminal post of the battery cover.

2. The battery cover support mechanism of claim 1, wherein, The anti-rotation support surface is provided with multiple protrusions, which are arranged in multiple rows and columns or in a circular array.

3. The battery cover support mechanism of claim 2, wherein, The protrusion includes at least one of prism protrusion, hemispherical protrusion, pyramidal protrusion, conical protrusion, and frustum protrusion.

4. The battery cover support mechanism of claim 1, wherein, The support base is also provided with a clearance groove. The clearance groove and the receiving groove are respectively provided on two side walls of the support base that are opposite to each other along its thickness direction. The clearance groove is connected to the through hole. The anti-rotation base includes a connecting part and an anti-rotation part. The connecting part is received in the clearance groove and the anti-rotation part is received in the through hole.

5. The battery cover support mechanism of claim 1, wherein, The perforation includes a first hole segment and a second hole segment, the diameter of the first hole segment is smaller than the diameter of the second hole segment, and the anti-rotation support surface is provided to protrude from the stepped surface formed by the first hole segment and the second hole segment.

6. The battery cover support mechanism according to any one of claims 1-5, wherein, The battery cover support mechanism also includes a support base. Both the support base and the anti-rotation seat are installed on the support base. The support base is connected to the support base by a first connecting bolt, and the anti-rotation seat is connected to the support base by a second connecting bolt.

7. The battery cover support mechanism according to any one of claims 1-5, wherein, It also includes a clamping assembly, which includes a clamping drive and a clamping block. The clamping drive is mounted on the support base, and one end of the clamping drive abuts against the clamping block. The clamping block abuts against the battery cover, and the clamping block is provided with a clearance hole, which is corresponding to the terminal post on the battery cover.

8. The battery cover support mechanism according to any one of claims 1-5, wherein, The area of ​​the anti-rotation support surface is not less than one-third of the area of ​​the perforation.

9. The battery cover support mechanism of any one of claims 1-5, wherein, The perforation is a circular hole.

10. A torque welding apparatus characterized by, The device includes a welding host, a cell support mechanism, and a battery cover support mechanism as described in any one of claims 1-9. The battery cover support mechanism is arranged in parallel with the cell support mechanism, and the welding host is located above the battery cover support mechanism. The welding host has a rotatable and liftable welding head.

11. The torque welding apparatus of claim 10, wherein, The end of the welding head is provided with a plurality of hemispherical protrusions and a plurality of frustum protrusions. Along the radial direction of the welding head, the plurality of hemispherical protrusions are located radially outside the plurality of frustum protrusions.

12. The torque welding apparatus of claim 11, wherein, The plurality of the truncated pyramidal protrusions are arranged in multiple rows and columns, and the plurality of the hemispherical protrusions are evenly spaced along the circumference of the welded joint.

13. The torque welding apparatus of claim 10, wherein, There are two cell support mechanisms, and the battery cover support mechanism is located between the two cell support mechanisms.

14. The torque welding apparatus of claim 10, wherein, The welding head is positioned opposite to the perforation.

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