Battery periphery welding device

Abstract

The utility model relates to the technical field of battery production, in particular to a battery periphery welding device.The battery periphery welding device comprises a rack, a rotating mechanism, a cover plate pressing mechanism, a side face pressing mechanism and a large face pressing mechanism, the rotating mechanism comprises a supporting plate, and the supporting plate is rotatably arranged on the rack; the cover plate pressing mechanism comprises a first pressing piece used for pressing the battery cover plate; the side face pressing mechanism comprises a second pressing piece used for pressing the side face of the battery. And the large surface pressing mechanism comprises a third pressing piece and is used for pressing the large surface of the battery. The battery is pressed through the cover plate pressing mechanism, the side face pressing mechanism and the large face pressing mechanism, the battery is prevented from moving relative to the supporting plate, the welding precision is guaranteed, the supporting plate can rotate by 360 degrees, battery periphery welding is completed through one-time clamping, and the welding efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of battery production, and particularly to a battery peripheral welding device. Background Art

[0002] The contemporary automotive industry is undergoing revolutionary changes, that is, traditional fuel vehicles are being gradually replaced by new energy vehicles. In particular, the sales proportion of electric vehicles in new energy vehicles is gradually increasing. As one of the core components of electric vehicles, the battery pack is mainly composed of battery modules, battery housings, cooling components and other parts. During the production process of the battery, after the battery module is installed in the battery housing, it is necessary to perform a sealing welding operation on the battery housing.

[0003] After the existing square shell battery is pre-spot welded into the shell, it is still necessary to perform peripheral welding on the positive and negative battery covers respectively. At present, the peripheral welding process mainly uses a turntable rotation and an auxiliary fixture tooling to press and hold the battery to be welded for welding. That is, the peripheral welding of the positive and negative battery covers adopts a two-device, multi-station mobile welding mode. Each time the peripheral welding process is performed, the processes of battery clamping and product loading and unloading need to be executed. It involves a large number of devices, a large floor area of the devices, a cumbersome peripheral welding process, and the multiple handling of products is prone to failures and uncontrollable factors. The multiple positioning and clamping of products result in a general deviation in the consistency of the welded products, an increase in NG products and waste, the multiple grasping and handling of products damage the battery cells and increase the production product beat, and the production efficiency is low.

[0004] In view of this, this application is specifically proposed. Utility Model Content

[0005] This application provides a battery peripheral welding device to solve the problem of how to improve the welding efficiency of battery peripheral welding.

[0006] This application provides a battery peripheral welding device, including:

[0007] A frame;

[0008] A rotating mechanism, the rotating mechanism includes a support plate for carrying the battery to be welded, and the support plate is rotatably arranged on the frame, and its rotation axis is parallel to the horizontal plane;

[0009] A cover pressing mechanism, the cover pressing mechanism includes a first pressing member capable of moving along the length direction of the battery for pressing the battery cover of the battery, wherein the length direction is parallel to the rotation axis direction; and

[0010] A side pressing mechanism, the side pressing mechanism includes a second pressing member capable of moving along the width direction of the battery for pressing the side of the battery; and

[0011] The large surface pressing mechanism, the large surface pressing mechanism includes a third pressing member capable of moving along the thickness direction of the battery for pressing the large surface of the battery.

[0012] In some embodiments, the cover pressing mechanism further includes a first fixing portion provided on the support plate and a first moving portion moving along the length direction relative to the first fixing portion, and the first moving portion is connected to the first pressing member so that the first pressing member can move along the length direction.

[0013] In some embodiments, the battery peripheral welding device further includes a first limiting block provided on the support plate, and the first limiting block and the first pressing member are oppositely arranged at both ends of the battery along the length direction and are respectively in limiting abutment with the two covers of the battery.

[0014] In some embodiments, the side pressing mechanism further includes a second fixing portion provided at the bottom of the support plate and a second moving portion moving along the width direction relative to the second fixing portion, and the second moving portion is connected to the second pressing member so that the second pressing member can move along the width direction.

[0015] In some embodiments, at least two side pressing mechanisms are arranged at intervals along the length direction and / or are arranged in a staggered manner along the width direction.

[0016] In some embodiments, the battery peripheral welding device further includes a second limiting block provided on the support plate, and the second limiting block and the second pressing member are oppositely arranged on both sides of the battery along the width direction and are respectively in limiting abutment with the two side surfaces of the battery.

[0017] In some embodiments, the large surface pressing mechanism further includes a third fixing portion provided on one side of the support plate and a third moving portion moving along the thickness direction relative to the third fixing portion, and the third moving portion is connected to the third pressing member so that the third pressing member can move along the thickness direction.

[0018] In some embodiments, at least two large surface pressing mechanisms are arranged at intervals along the length direction and / or are arranged in a staggered manner along the width direction.

[0019] In some embodiments, the support plate has a first end and a second end oppositely arranged along the length direction, the frame includes a first vertical plate and a second vertical plate oppositely arranged along the rotation axis direction, and the rotation mechanism further includes:

[0020] A rotation motor, the rotation motor is installed on the first vertical plate;

[0021] The first bearing, the first bearing is fixedly connected to the output shaft of the rotating motor, and the outer ring of the first bearing is fixedly arranged through the first vertical plate;

[0022] The first clamping member, one end of the first clamping member in the length direction is in interference fit with the inner ring of the first bearing, and the other end is in limiting abutment with the first end; and

[0023] The second bearing, the outer ring of the second bearing is fixedly arranged through the second vertical plate; and

[0024] The second clamping member, one end of the second clamping member in the length direction is in interference fit with the inner ring of the second bearing, and the other end is in limiting abutment with the second end.

[0025] In some embodiments, the frame further includes a cross plate, both ends of the cross plate in the length direction are respectively connected to the first vertical plate and the second vertical plate, and reinforcing ribs are arranged at the connection between the first vertical plate and the cross plate and / or at the connection between the second vertical plate and the cross plate.

[0026] After adopting the above technical solution, the present application has the following beneficial effects compared with the prior art.

[0027] 1. In the battery peripheral welding device of the present application, the battery is pressed by the cover pressing mechanism, the side pressing mechanism and the large surface pressing mechanism, so as to realize the limiting and fixing of the battery in the length direction, width direction and thickness direction of the battery, prevent the battery from moving relative to the support plate, ensure the welding accuracy of the battery, and thus improve the welding quality of the battery.

[0028] 2. In the battery peripheral welding device of the present application, the support plate can rotate 360° around its rotation axis. By controlling the rotation angle of the support plate, the positive battery cover and the negative battery cover are respectively welded, so as to realize the battery peripheral welding with one clamping, and improve the welding efficiency of the battery. Description of the Drawings

[0029] Figure 1 is a schematic structural diagram of a battery peripheral welding device in an embodiment of the present application;

[0030] Figure 2 is a schematic structural diagram of a battery peripheral welding device for carrying a battery to be welded in an embodiment of the present application;

[0031] Figure 3 is Figure 2 a partial enlarged view of part A in

[0032] Figure 4 is Figure 2 a partial enlarged view of part B in

[0033] Figure 5 It is a schematic structural diagram of a battery in an embodiment of the present application.

[0034] In the figure: 100, battery peripheral welding device; 110, frame; 111, first vertical plate; 112, second vertical plate; 113, cross plate; 114, reinforcing rib; 120, rotating mechanism; 121, support plate; 122, rotating motor; 123, first bearing; 124, second bearing; 125, first clamping member; 126, second clamping member; 130, cover pressing mechanism; 131, first pressing member; 132, first driving assembly; 1321, first fixing portion; 1322, first moving portion; 140, side pressing mechanism; 141, second pressing member; 142, second driving assembly; 1421, second fixing portion; 1422, second moving portion; 150, large surface pressing mechanism; 151, third pressing member; 152, third driving assembly; 1521, third fixing portion; 1522, third moving portion; 160, first limiting block; 170, second limiting block; 200, battery; 210, battery cover. Specific embodiments

[0035] Next, the technical solutions of the present application will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0036] An embodiment of the present application provides a battery peripheral welding device 100. For the specific structure of the battery peripheral welding device 100, please refer to Figures 1 to 5 , which includes a frame 110, a rotating mechanism 120, a cover pressing mechanism 130, a side pressing mechanism 140, and a large surface pressing mechanism 150. Among them, the rotating mechanism 120 includes a support plate 121 for carrying the battery 200 to be welded. The support plate 121 is rotatably arranged on the frame 110, and its rotation axis is parallel to the horizontal plane; the cover pressing mechanism 130 includes a first pressing member 131 that can move along the length direction of the battery 200, and is used to press the battery cover 210 of the battery 200, where the length direction is parallel to the rotation axis direction; the side pressing mechanism 140 includes a second pressing member 141 that can move along the width direction of the battery 200, and is used to press the side of the battery 200; the large surface pressing mechanism 150 includes a third pressing member 151 that can move along the thickness direction of the battery 200, and is used to press the large surface of the battery 200.

[0037] According to the battery peripheral welding device 100 of the present application, the battery 200 is pressed by the cover pressing mechanism 130, the side pressing mechanism 140 and the large surface pressing mechanism 150, so as to realize the limiting and fixing of the battery 200 along the length direction, width direction and thickness direction of the battery 200, prevent the battery 200 from moving relative to the support plate 121, ensure the welding accuracy of the battery 200, and thus improve the welding quality of the battery 200; and the support plate 121 can rotate 360° around its rotation axis. By controlling the rotation angle of the support plate 121, the positive battery cover plate 210 and the negative battery cover plate 210 are respectively welded, and the peripheral welding of the battery 200 is completed in one clamping, improving the welding efficiency of the battery 200.

[0038] As Figures 1 to 3 shown, the cover pressing mechanism 130 further includes a first driving component 132 connected to the first pressing member 131, which is used to drive the first pressing member 131 to move along the length direction of the battery 200. Among them, the first driving component 132 includes a first fixing portion 1321 provided on the support plate 121 and a first moving portion 1322 that moves along the length direction of the battery 200 relative to the first fixing portion 1321. The first moving portion 1322 is connected to the first pressing member 131, so that the first pressing member 131 can move along the length direction of the battery 200. Thus, the first pressing member 131 moves between the pressing position and the releasing position, realizing the pressing of the battery cover plate 210, or after the welding is completed, controlling the separation of the first pressing member 131 from the battery cover plate 210, with a high degree of automation.

[0039] Exemplarily, the first driving component 132 is a hydraulic actuator. The hydraulic actuator includes a first cylinder body fixed on the support plate 121 and a first piston rod telescopically arranged in the first cylinder body. One end of the first piston rod is connected to the first pressing member 131. The first cylinder body is fixed on the support plate 121, and the connection is more firm, ensuring the stable telescopic movement of the first piston rod relative to the first cylinder body, and thus driving the first pressing member 131 to reciprocate between the pressing position and the releasing position.

[0040] As Figure 1 、 Figure 2 and Figure 4 shown, the battery peripheral welding device 100 further includes a first limiting block 160 provided on the support plate 121. The first limiting block 160 and the first pressing member 131 are oppositely arranged along the length direction at both ends of the battery 200, and are respectively in limit contact with the two cover plates of the battery 200. Thus, the positive and negative battery cover plates 210 are respectively limited and fixed by the first limiting block 160 and the first pressing member 131. There is no need to set multiple cover pressing mechanisms 130, the structure is simple, and the limiting effect is good.

[0041] As Figure 1 、 Figure 2 andFigure 4 As shown, the side pressing mechanism 140 further includes a second driving assembly 142 connected to the second pressing member 141 for driving the second pressing member 141 to move along the width direction of the battery 200. Among them, the second driving assembly 142 includes a second fixing portion 1421 provided at the bottom of the support plate 121 and a second moving portion 1422 that moves along the width direction of the battery 200 relative to the second fixing portion 1421. The second moving portion 1422 is connected to the second pressing member 141 so that the second pressing member 141 can move along the width direction of the battery 200, thereby enabling the second pressing member 141 to move between a pressing position and a releasing position, realizing pressing on the side of the battery 200, or after welding is completed, controlling the separation of the second pressing member 141 from the side of the battery 200, with a high degree of automation.

[0042] At least two side pressing mechanisms 140 are arranged at intervals along the length direction of the battery 200 and / or are arranged staggeredly along the width direction of the battery 200 to realize pressing on different positions of the side of the battery 200, further improving the pressing effect of the side pressing machine. Exemplarily, as Figure 1 and Figure 2 shown, two side pressing mechanisms 140 are arranged at intervals along the length direction of the battery 200 to press the front side and the rear side of the battery 200 simultaneously.

[0043] Exemplarily, the second driving assembly 142 is a hydraulic actuator. The hydraulic actuator includes a second cylinder body fixed at the bottom of the support plate 121 and a second piston rod telescopically arranged in the second cylinder body. The second piston rod is arranged at the bottom of the support plate 121, and one end of the second piston rod is connected to the bottom end of the second pressing member 141. The second cylinder body is fixed at the bottom of the support plate 121, and the connection is more firm, ensuring the stable telescopic movement of the second piston rod relative to the second cylinder body, thereby driving the second pressing member 141 to reciprocate between a pressing position and a releasing position.

[0044] As Figure 1 、 Figure 2 and Figure 4 shown, the battery peripheral welding device 100 further includes a second limiting block 170 provided on the support plate 121. The second limiting block 170 and the second pressing member 141 are arranged opposite to each other along the width direction on both sides of the battery 200 and are respectively in limiting contact with the two side surfaces of the battery 200, so as to limit and fix the two side surfaces of the battery 200 through the second limiting block 170 and the second pressing member 141 respectively. There is no need to set multiple side pressing mechanisms 140, the structure is simple, and the limiting effect is good.

[0045] As Figure 1 、 Figure 2 and Figure 4As shown, the large surface pressing mechanism 150 further includes a third driving assembly 152 connected to the third pressing member 151 for driving the third pressing member 151 to move in the thickness direction of the battery 200. Among them, the third driving assembly 152 includes a third fixing portion 1521 provided on one side of the support plate 121 and a third moving portion 1522 that moves in the thickness direction relative to the third fixing portion 1521. The third moving portion 1522 is connected to the third pressing member 151 so that the third pressing member 151 can move in the thickness direction. Thus, the third pressing member 151 moves between the pressing position and the releasing position to press the large surface of the battery 200, or after welding is completed, the third pressing member 151 is controlled to separate from the large surface of the battery 200, with a high degree of automation.

[0046] At least two large surface pressing mechanisms 150 are arranged at intervals in the length direction and / or staggered in the width direction to press different positions of the large surface of the battery 200, further improving the pressing effect of the large surface pressing machine. Exemplarily, as Figure 1 、 Figure 2 and Figure 4 shown, two large surface pressing mechanisms 150 are arranged at intervals in the length direction of the battery 200 to press the front side and the rear side of the battery 200 simultaneously.

[0047] As Figure 1 and Figure 2As shown, the support plate 121 has a first end and a second end oppositely arranged along the length direction of the battery 200. The frame 110 includes a first vertical plate 111 and a second vertical plate 112 oppositely arranged along the rotation axis direction. The rotation mechanism 120 further includes a rotation motor 122, a first bearing 123, a second bearing 124, a first clamping member 125, and a second clamping member 126. Among them, the rotation motor 122 is installed on the first vertical plate 111; the first bearing 123 is fixedly connected to the output shaft of the rotation motor 122, and the outer ring of the first bearing 123 is fixedly installed through the first vertical plate 111; one end of the first clamping member 125 in the length direction is in interference fit with the inner ring of the first bearing 123, and the other end is in limit abutment with the first end; the outer ring of the second bearing 124 is fixedly installed through the second vertical plate 112; the second clamping member 126, one end of the second clamping member 126 in the length direction is in interference fit with the inner ring of the second bearing 124, and the other end is in limit abutment with the second end. Since the first bearing 123 is fixedly connected to the output shaft of the rotation motor 122, the first clamping member 125 is in interference fit with the first bearing 123, and the second clamping member 126 is in interference fit with the second bearing 124, the support plate 121 is clamped between the first clamping member 125 and the second clamping member 126. After starting the rotation motor 122, it drives the support plate 121 to rotate synchronously, so that the cover pressing mechanism 130, the side pressing mechanism 140, and the large surface pressing mechanism 150 rotate synchronously with the support plate 121, ensuring that the battery 200 is firmly fixed on the support plate 121 and preventing the battery 200 from moving relative to the support plate 121 and affecting the welding accuracy of the battery 200.

[0048] As Figure 1 and Figure 2 shown, the frame 110 further includes a cross plate 113. The two ends of the cross plate 113 in the length direction are respectively connected to the first vertical plate 111 and the second vertical plate 112. A reinforcing rib 114 is provided at the connection between the first vertical plate 111 and the cross plate 113 and / or at the connection between the second vertical plate 112 and the cross plate 113. The first vertical plate 111, the cross plate 113, and the second vertical plate 112 are connected in sequence to construct a U-shaped frame 110, which has a simple structure and good support effect. And a reinforcing rib 114 is provided at the connection between the first vertical plate 111 and the cross plate 113 and / or at the connection between the second vertical plate 112 and the cross plate 113, thereby improving the structural strength of the frame 110.

[0049] The specific process of loading the battery 200 is as follows: As Figure 1 and Figure 2As shown, the feeding manipulator grabs the battery 200 (not shown in the figure) and places it on the support plate 121. The cover pressing mechanism 130 operates to push the battery 200 against the first limiting plate. Then, the cover pressing mechanism 130 retracts to the initial position. The two side pressing mechanisms 140 arranged at intervals along the length direction of the battery 200 operate synchronously to limit and abut the battery 200 against the second limiting plate. The cover pressing mechanism 130 is started again to push the battery 200 against the first limiting plate. Then, the large surface pressing mechanisms 150 arranged at intervals along the length direction of the battery 200 are controlled to operate synchronously, so that the positive and negative battery covers 210 are limited and abutted against the cover pressing mechanism 130.

[0050] The specific process of welding around the battery 200 is as follows: As Figure 1 and Figure 2 shown, the linear module (not shown in the figure) conveys the jig to a specific position for the CCD vision positioning mechanism (not shown in the figure) to position the relationship between the product position and the jig position and the front and rear weld positions. The linear module (not shown in the figure) moves to the visual feedback position. The laser welding mechanism (not shown in the figure) positions and welds the long side of the positive electrode of the battery 200. The rotation mechanism 120 is controlled to rotate 90°. The welding mechanism welds the left side of the positive electrode battery cover 210. The rotation mechanism 120 is controlled to rotate 90°. The welding mechanism welds the lower large surface of the positive electrode of the battery 200. The rotation mechanism 120 is controlled to rotate 90°. The welding mechanism welds the right side of the positive electrode battery cover 210. The linear module (not shown in the figure) moves to the visual feedback position. At the same time, the rotation mechanism 120 is controlled to rotate 90° to reset, keeping the battery 200 in a horizontal state. The laser welding mechanism (not shown in the figure) welds the long side of the negative electrode battery cover 210. The rotation mechanism 120 is controlled to rotate 90°. The welding mechanism welds the left side of the negative electrode battery cover 210. The rotation mechanism 120 is controlled to rotate 90°. The welding mechanism welds the lower large surface of the negative electrode battery cover 210. The rotation mechanism 120 is controlled to rotate 90°. The welding mechanism welds the right side of the negative electrode battery cover 210. The linear module (not shown in the figure) moves to the unloading position. At the same time, the rotation mechanism 120 is controlled to rotate 90° to reset, keeping the battery 200 in a horizontal state.

[0051] The specific process of unloading the battery 200 is as follows: As Figure 1 and Figure 2As shown, the large surface pressing mechanisms 150 arranged at intervals along the length direction of the battery 200 are controlled to act synchronously to loosen the end caps on the front and rear sides of the battery 200. The cover plate pressing mechanism 130 acts to push and retract to press the battery 200. The two side pressing mechanisms 140 arranged at intervals along the length direction of the battery 200 act synchronously to retract the mechanism for pressing the battery 200. The feeding manipulator grabs (not shown in the figure) and takes away the battery 200 from the upper surface of the support plate 121. This mechanism realizes synchronous welding of the positive and negative electrode top covers, reduces the number of clamping times, reduces the deformation of the product, improves the welding quality, optimizes the process of peripheral welding, has a better process, and lower cost.

[0052] The battery in this application is applied to an energy storage device, and the energy storage device can be a device with a battery swapping function such as a vehicle or a working machine.

[0053] In the description of this application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0054] In addition, the terms "upper" and "lower" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "upper" and "lower" may explicitly or implicitly include at least one of such features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0055] In this application, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0056] In this application, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0057] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A battery peripheral welding device, characterized in that, Comprising: Frame; Rotating mechanism, the rotating mechanism includes a support plate for carrying the battery to be welded, the support plate is rotatably arranged on the frame, and its rotation axis is parallel to the horizontal plane; Cover pressing mechanism, the cover pressing mechanism includes a first pressing member capable of moving along the length direction of the battery, for pressing the battery cover of the battery, wherein, the length direction is parallel to the rotation axis direction; and Side pressing mechanism, the side pressing mechanism includes a second pressing member capable of moving along the width direction of the battery, for pressing the side of the battery; and Large surface pressing mechanism, the large surface pressing mechanism includes a third pressing member capable of moving along the thickness direction of the battery, for pressing the large surface of the battery.

2. The battery peripheral welding device according to claim 1, wherein The cover pressing mechanism further includes a first fixing portion arranged on the support plate and a first moving portion moving along the length direction relative to the first fixing portion, the first moving portion is connected to the first pressing member, so that the first pressing member can move along the length direction.

3. The battery peripheral welding device according to claim 2, characterized in that, The battery peripheral welding device further includes a first limiting block arranged on the support plate, the first limiting block and the first pressing member are arranged at both ends of the battery along the length direction relatively, and are respectively in limiting abutment with the two covers of the battery.

4. The battery peripheral welding device according to claim 1, characterized in that The side pressing mechanism further includes a second fixing portion arranged at the bottom of the support plate and a second moving portion moving along the width direction relative to the second fixing portion, the second moving portion is connected to the second pressing member, so that the second pressing member can move along the width direction.

5. The battery peripheral welding device according to claim 4, characterized in that, At least two side pressing mechanisms are arranged at intervals along the length direction and / or are arranged staggeredly along the width direction.

6. The battery peripheral welding device according to claim 4, characterized in that, The battery peripheral welding device further includes a second limiting block arranged on the support plate, the second limiting block and the second pressing member are arranged on both sides of the battery along the width direction relatively, and are respectively in limiting abutment with the two sides of the battery.

7. The battery peripheral welding device according to claim 1, characterized in that, The large surface pressing mechanism further includes a third fixing portion arranged on one side of the support plate and a third moving portion moving along the thickness direction relative to the third fixing portion, the third moving portion is connected to the third pressing member, so that the third pressing member can move along the thickness direction.

8. The battery peripheral welding device according to claim 7, wherein, At least two large surface pressing mechanisms are arranged at intervals along the length direction and / or are arranged staggeredly along the width direction.

9. The battery peripheral welding device according to any one of claims 1 to 8, characterized in that, The support plate has a first end and a second end arranged relatively along the length direction, the frame includes a first vertical plate and a second vertical plate arranged relatively along the rotation axis direction, and the rotating mechanism further includes: Rotating motor, the rotating motor is installed on the first vertical plate; First bearing, the first bearing is fixedly connected to the output shaft of the rotating motor, and the outer ring of the first bearing is fixedly arranged through the first vertical plate; First clamping member, one end of the first clamping member along the length direction is in interference fit with the inner ring of the first bearing, and the other end is in limiting abutment with the first end; and Second bearing, the outer ring of the second bearing is fixedly arranged through the second vertical plate; and The second clamping member, one end of the second clamping member in the length direction is in interference fit with the inner ring of the second bearing, and the other end is in limiting abutment with the second end.

10. The battery peripheral welding device according to claim 9, wherein, The frame further includes a cross plate, both ends of the cross plate in the length direction are respectively connected to the first vertical plate and the second vertical plate, and reinforcing ribs are provided at the connection between the first vertical plate and the cross plate and / or at the connection between the second vertical plate and the cross plate.

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