Device and method for through-wall welding of tubular batteries

Abstract

The present invention discloses a device and method for through-wall welding of tubular batteries, which relates to the technical field of through-wall welding of batteries, and comprises a frame, a fixed plate is fixedly connected to the frame, a lifting assembly is provided on the frame, a welding assembly is connected to the lifting assembly, a conveying assembly and a positioning assembly are also provided on the frame, the lifting assembly is used to drive the welding assembly to move up and down so that the welding assembly can accurately align with the part to be welded, and the welding assembly comprises a clamping servo motor fixedly connected to the top of the frame, and the output end of the clamping servo motor is connected to a first transmission mechanism connected to the frame. When in use, the traditional oil cylinder drive is replaced by the clamping servo motor and the reducer combination, so that the output is more stable, ensuring that the clamping force of the welding arm on the welding position is more stable when welding, thereby effectively improving the quality and effect of welding.

Description

Technical Field

[0001] The invention relates to the technical field of battery through-wall welding, and in particular to a device and method for through-wall welding of tubular batteries. Background Art

[0002] Through-wall welding refers to welding the connecting bars between the single cells in the battery pack through the plastic partition wall between two adjacent single cells and connecting them in series. This can reduce the weight of the connecting bars and improve the energy density and specific energy of the battery. It is a process commonly used in modern starting lead-acid batteries.

[0003] The working principle of the battery through-wall welder is realized through resistance welding technology. Specifically, when the current passes through the contact surface between the electrode and the workpiece, high heat is generated, causing the contact surface to melt, thereby forming a welding point.

[0004] Due to limited space on site, the through-wall welder currently in use is a single-station through-wall welder with hydraulic transmission. The hydraulic system has stable transmission and high pressure. In continuous production, the clamping deformation of the welded parts is almost the same, but the chuck assembly of the hydraulic system is relatively bloated, the control is not flexible, and it is difficult to achieve multi-segment movement. During the control process, factors such as oil pressure and oil temperature will affect the welding effect, and clamping welding is performed once, so that strip-shaped pores will appear at the welding point after welding, which will lead to poor welding and reduce the welding effect and quality. Summary of the invention

[0005] The purpose of the present invention is to provide a device for through-wall welding of tubular batteries, so as to solve the problem that the oil pressure, oil temperature and other factors of the existing through-wall welding machine mentioned in the above background technology will affect the welding effect during the control process, and the clamping welding is performed once, so that strip-shaped pores will appear at the welding point after welding, which will lead to poor welding and reduce the welding effect and quality.

[0006] To achieve the above object, the present invention provides the following technical solution: a device for through-wall welding of tubular batteries, comprising a frame, a fixing plate fixedly connected to the frame, a lifting assembly provided on the frame, a welding assembly connected to the lifting assembly, and a conveying assembly and a positioning assembly further provided on the frame;

[0007] The lifting assembly is used to drive the welding assembly to move up and down so that the welding assembly can be accurately aligned with the part to be welded;

[0008] The welding assembly includes a clamping servo motor fixedly connected to the top of the frame, the output end of the clamping servo motor is connected to the first transmission mechanism connected to the frame, the first transmission mechanism is connected to the clamping mechanism connected to the frame, the welding assembly also includes two welding arms symmetrically connected to the frame, and the clamping mechanism is used to drive the two welding arms to rotate in a direction away from or close to each other.

[0009] Preferably, the lifting assembly includes a lifting servo motor fixedly connected to the top of the frame, the output end of the lifting servo motor is connected to the second transmission mechanism, the second transmission mechanism is connected to the first mounting plate, the lifting assembly also includes two slide rails symmetrically fixedly connected to the front of the fixed plate, two groups of moving blocks are symmetrically fixedly connected on the two slide rails, the back side of the first mounting plate and the front side of the two groups of moving blocks are fixedly connected, and the clamping mechanism is connected to the first mounting plate. The advantage of such a setting is that it can ensure the adjustment accuracy of the lifting height of the welding arm, so that the welding arm can be more accurately aligned with the welding part, thereby improving the quality and effect of welding.

[0010] Preferably, the clamping mechanism includes two horizontal plates symmetrically fixedly connected to the front side of the first mounting plate, two mounting grooves are symmetrically provided on the side faces away from each other of the two horizontal plates, and two swing arms are symmetrically rotatably connected between the front and rear inner side walls of the two mounting grooves through two rotating shafts. The clamping mechanism also includes two rotating plates symmetrically rotatably connected to the front side of the first mounting plate, the two rotating plates are distributed in an eight-shaped shape, two first connecting plates are symmetrically fixedly connected on the side faces of the two rotating plates that are close to each other, an elastic member is fixedly connected between the side faces of the two first connecting plates that are close to each other, and the two welding arms are symmetrically fixedly connected to the two first The bottom of the connecting plate, the clamping mechanism also includes a driving block fixedly connected to the bottom of the first transmission mechanism, the driving block is an inverted isosceles trapezoid, the top ends of the two swing arms are respectively in conflict with the two inclined waist surfaces of the driving block, and the bottom ends of the two swing arms are respectively in conflict with the side surfaces of the two rotating plates that are away from each other. The advantage of this arrangement is that the clamping servo motor drives the driving block to move up and down through the first transmission mechanism, and the driving block drives the bottom ends of the two swing arms to rotate in the direction of moving away from or approaching each other, so that the elastic part can cooperate to drive the two swing arms to stably separate from the welding part or clamp the welding part, thereby ensuring the quality of welding.

[0011] Preferably, the clamping mechanism also includes two vertical plates symmetrically fixedly connected to the front side of the first mounting plate, and two limit grooves are symmetrically provided on the sides of the two vertical plates that are far away from each other. The two swing arms symmetrically penetrate the two limit grooves, and the front and rear side surfaces of the swing arms are respectively fitted with the front and rear inner walls of the limit grooves. The advantage of such a setting is that the stability of the force applied by the swing arm when driving the two welding arms to rotate can be ensured, so that the clamping force of the welding arm on the welding point is more stable and accurate, which greatly improves the welding effect and quality.

[0012] Preferably, the upper and lower ends of the swing arm are symmetrically rotatably connected to two rollers, and the outer circumferential surfaces of the two rollers are respectively tightly pressed against the inclined waist surface of the driving block and the side surface of the rotating plate. The advantage of such an arrangement is that the friction force between the swing arm and the driving block and the rotating plate is reduced when displacement occurs, thereby reducing the pressure on the swing arm, the driving block and the rotating plate, thereby increasing the service life of the three and improving the reliability of the welding device.

[0013] Preferably, the positioning assembly includes a front and rear adjustment mechanism fixedly connected to the frame, a positioning plate fixedly connected to the front end of the front and rear adjustment mechanism, and the positioning plate is located above the conveying assembly. The welding assembly also includes an auxiliary laser locator fixedly connected to the front sides of the two vertical plates. The advantage of this arrangement is that the positioning of the tubular batteries and connecting strips can be completed conveniently and accurately, ensuring the accuracy of the subsequent welding position and improving the quality and effect of welding.

[0014] In summary, the technical effects and advantages of the present invention are as follows:

[0015] 1. In the present invention, the clamping servo motor and reducer combination are provided to replace the traditional cylinder drive, so that the output is more stable, ensuring that the clamping force of the welding arm on the welding position is more stable during welding, thereby effectively improving the quality and effect of welding.

[0016] 2. In the present invention, a clamping servo motor and a reducer combination are provided to replace the traditional cylinder drive. After the welding part is clamped and welded once, the clamping servo motor can drive the drive block to move downward again, so that the swing arm can stably increase the driving force on the two welding arms through the rotating plate and the first connecting plate again. In this way, the air is squeezed out when the weld point is not yet completely solidified, thereby eliminating the long strip pores between the weld points and ensuring the firmness of the welding electricity. Compared with the traditional cylinder driven welding, which can only perform one clamping welding after strictly limiting the rotation angle of the welding arm to ensure the stability of the clamping force, the welding quality and effect can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a schematic structural diagram of a device for through-wall welding of tubular batteries in an embodiment of the present invention;

[0019] Figure 2 It is a left side view of the rear wheel position adjustment assembly in an embodiment of the present invention;

[0020] Figure 3 is a top view of a rear wheel position adjustment assembly in an embodiment of the present invention;

[0021] Figure 4 In the embodiment of the present invention Figure 1 The enlarged schematic diagram of point A in the middle;

[0022] Figure 5 In the embodiment of the present invention Figure 1 A magnified schematic diagram of point B in the middle.

[0023] In the figure: 1. frame; 2. fixed plate; 3. lifting assembly; 31. lifting servo motor; 32. slide rail; 33. moving block; 34. first mounting plate; 4. welding assembly; 41. clamping servo motor; 42. clamping mechanism; 421. cross plate; 422. rotating shaft; 423. swing arm; 424. rotating plate; 425. first connecting plate; 426. elastic member; 427. driving block; 428. vertical plate; 429. limiting groove; 4210. roller; 43. welding arm; 44. auxiliary laser locator; 5. conveying assembly; 6. positioning assembly; 61. front and rear adjustment mechanism; 611. electromagnet block; 612. push plate; 613. rectangular groove; 62. positioning plate; 7. electric control box; 8. welding control box; 9. operating table; 10. second mounting plate; 11. drag chain support plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Please refer to Figure 1-Figure 5 The device for through-wall welding of tubular batteries shown in the figure comprises a frame 1, a fixing plate 2 is fixedly connected to the frame 1, a lifting assembly 3 is provided on the frame 1, a welding assembly 4 is connected to the lifting assembly 3, and a conveying assembly 5 and a positioning assembly 6 are also provided on the frame 1;

[0026] The lifting assembly 3 is used to drive the welding assembly 4 to move up and down so that the welding assembly 4 can be accurately aligned with the part to be welded;

[0027] The welding assembly 4 includes a clamping servo motor 41 fixedly connected to the top of the frame 1, the output end of the clamping servo motor 41 is connected to the first transmission mechanism connected to the frame 1, the first transmission mechanism is connected to the clamping mechanism 42 connected to the frame 1, and the welding assembly 4 also includes two welding arms 43 symmetrically connected to the frame 1, and the clamping mechanism 42 is used to drive the two welding arms 43 to rotate in a direction away from or close to each other;

[0028] The conveying assembly 5 is a plurality of unpowered rollers connected to the frame 1 and rotated equidistantly from left to right, so that after placing the tubular battery on the unpowered roller, the staff can conveniently push the tubular battery to move left and right, thereby reducing the labor intensity of the positioning operation;

[0029] The frame 1 is fixedly connected with an electric control box 7, a welding control box 8 and an operating table 9. The welding control box 8 is equipped with a welding controller, and the operating table 9 is used to operate the device to work;

[0030] A second mounting plate 10 is fixedly connected to the frame 1, and a drag chain support plate 11 is installed on the second mounting plate 10. The drag chain support plate 11 is used to protect the cables of the device to ensure the safety of the related cables when the welding assembly 4 is lifted and lowered under the drive of the lifting assembly 3, thereby improving the reliability of the device.

[0031] refer to Figure 1 and Figure 4 The lifting component 3 includes a lifting servo motor 31 fixedly connected to the top of the frame 1, the output end of the lifting servo motor 31 is connected to the second transmission mechanism, the second transmission mechanism is connected to the first mounting plate 34, the lifting component 3 also includes two slide rails 32 symmetrically fixedly connected to the front of the fixed plate 2, two groups of moving blocks 33 are symmetrically fixedly connected to the two slide rails 32, the back side of the first mounting plate 34 is fixedly connected to the front side of the two groups of moving blocks 33, and the clamping mechanism 42 is connected to the first mounting plate 34.

[0032] Specifically, the lifting servo motor 31 can more stably drive the welding arm 43 to move up and down through the second transmission mechanism, the slide rail 32 and the moving block 33, ensuring the adjustment accuracy of the lifting height of the welding arm 43, so that the welding arm 43 can be more accurately aligned with the welding part, thereby improving the quality and effect of welding.

[0033] refer to Figure 1 , Figure 2 and Figure 4The clamping mechanism 42 includes two horizontal plates 421 symmetrically fixedly connected to the front side of the first mounting plate 34, and two mounting grooves are symmetrically provided on the sides away from each other of the two horizontal plates 421. Two swing arms 423 are symmetrically rotatably connected between the front and rear inner side walls of the two mounting grooves through two rotating shafts 422. The clamping mechanism 42 also includes two rotating plates 424 symmetrically rotatably connected to the front side of the first mounting plate 34. The two rotating plates 424 are distributed in an eight-shaped shape. Two first connecting plates 425 are symmetrically fixedly connected on the sides close to each other of the two rotating plates 424. An elastic member 426 is fixedly connected between the sides close to each other of the two first connecting plates 425. The two welding arms 43 are symmetrically fixedly connected to the bottom of the two first connecting plates 425. The clamping mechanism 42 also includes a driving block 427 fixedly connected to the bottom of the first transmission mechanism. The driving block 427 is an inverted isosceles trapezoid. The top ends of the two swing arms 423 respectively conflict with the two oblique waist surfaces of the driving block 427, and the bottom ends of the two swing arms 423 respectively conflict with the sides away from the two rotating plates 424.

[0034] Specifically, the clamping servo motor 41 drives the driving block 427 to move up and down through the first transmission mechanism, and the driving block 427 drives the bottom ends of the two swing arms 423 to rotate in the direction of moving away from or approaching each other, so that the elastic member 426 can be cooperated to drive the two swing arms 423 to stably separate from the welding part or clamp the welding part to ensure the quality of welding. At the same time, after the welding part is clamped and welded once, the clamping servo motor 41 drives the driving block 427 to move downward again, so that the swing arm 423 increases the driving force on the two welding arms 43 again through the rotating plate 424 and the first connecting plate 425, so that the air is squeezed out when the weld is not yet fully solidified, thereby eliminating the long strip pores between the welds, ensuring the firmness of the welding, and further improving the quality and effect of welding.

[0035] refer to Figure 4 The clamping mechanism 42 also includes two vertical plates 428 symmetrically fixedly connected to the front side of the first mounting plate 34. Two limiting grooves 429 are symmetrically opened on the sides away from each other of the two vertical plates 428. Two swing arms 423 symmetrically pass through the two limiting grooves 429. The front and rear side surfaces of the swing arms 423 are respectively in contact with the front and rear inner walls of the limiting grooves 429.

[0036] Specifically, the swing arm 423 can be further limited to prevent the swing arm 423 from shaking in the front-to-back direction when rotating, thereby ensuring the stability of the force applied by the swing arm 423 when driving the two welding arms 43 to rotate, so that the clamping force of the welding arm 43 on the welding point is more stable and accurate, greatly improving the welding effect and quality.

[0037] refer to Figure 4The upper and lower ends of the swing arm 423 are symmetrically connected to two rollers 4210 for rotation, and the outer circumferences of the two rollers 4210 are respectively tightly pressed against the inclined waist surface of the driving block 427 and the side surface of the rotating plate 424.

[0038] Specifically, the friction force when displacement occurs between the swing arm 423 and the drive block 427 and the rotating plate 424 is reduced, thereby reducing the pressure on the swing arm 423, the drive block 427 and the rotating plate 424, increasing their service life and improving the reliability of the welding device.

[0039] refer to Figure 1 , Figure 2 and Figure 5 The positioning assembly 6 includes a front and rear adjustment mechanism 61 fixedly connected to the frame 1, and a positioning plate 62 is fixedly connected to the front end of the front and rear adjustment mechanism 61. The positioning plate 62 is located above the conveying assembly 5. The welding assembly 4 also includes an auxiliary laser positioner 44 fixedly connected to the front side of the two vertical plates 428.

[0040] Specifically, the front and rear position of the positioning plate 62 can be adjusted through the front and rear adjustment mechanism 61, so that the front and rear position of the tubular battery to be welded can be accurately limited, and then the center of the tubular battery can be aligned with the center between the two welding arms 43 in cooperation with the auxiliary laser positioner 44. In this way, the positioning of the tubular battery and the connecting strip can be completed conveniently and accurately, ensuring the accuracy of the subsequent welding position and improving the quality and effect of welding.

[0041] The front and rear adjustment mechanism 61 includes two electromagnet blocks 611 symmetrically fixedly connected to the frame 1, and two groups of limit blocks are symmetrically fixedly connected to the top of the two electromagnet blocks 611. The front and rear adjustment mechanism 61 also includes two push plates 612 symmetrically distributed on the left and right. The push plates 612 are made of iron. The electromagnet blocks 611 can adsorb the push plates 612. Two rectangular grooves 613 are symmetrically opened on the top of the two push plates 612. The bottom ends of the two rectangular grooves 613 respectively penetrate the bottom walls of the two push plates 612, and the two groups of limit blocks are symmetrically slidably connected in the two rectangular grooves 613.

[0042] Specifically, by cutting off the power to the electromagnet block 611, the electromagnet block 611 no longer attracts the push plate 612, and then the two push plates 612 can be pushed forward and backward through the rectangular groove 613 and the limiting block to accurately and conveniently adjust the front and rear positions of the positioning plate 62 according to the size of the tubular battery, so that the positioning plate 62 can assist in positioning the front and rear positions of the tubular battery.

[0043] Working principle: the electromagnet block 611 is powered off, and the electromagnet block 611 no longer absorbs the push plate 612. Then, the two push plates 612 can be pushed forward and backward through the rectangular groove 613 and the limit block to accurately and conveniently adjust the front and rear positions of the positioning plate 62 according to the size of the tubular battery. Then, the tubular battery to be welded is placed on the top of the unpowered roller, and then the battery is brought into contact with the front of the positioning plate 62, so that the positioning plate 62 can assist in completing the front and rear positioning of the tubular battery.

[0044] Then, the tubular battery is pushed to move left and right on the unpowered roller, and the auxiliary laser locator 44 is turned on to align the center of the tubular battery with the center between the two welding arms 43, thus completing the battery positioning operation.

[0045] Then, the lifting servo motor 31 is started through the operating platform 9. The lifting servo motor 31 can drive the welding arm 43 to move up and down more stably through the second transmission mechanism, the slide rail 32 and the moving block 33, ensuring the adjustment accuracy of the lifting height of the welding arm 43, so that the welding arm 43 can be more accurately aligned with the welding part, thereby improving the quality and effect of welding.

[0046] Then start the clamping servo motor 41, which drives the driving block 427 to move up and down through the first transmission mechanism. The driving block 427 drives the bottom ends of the two swing arms 423 to rotate in the direction of moving away from or approaching each other. In this way, the elastic member 426 can cooperate to drive the two swing arms 423 to stably separate from the welding part or clamp the welding part, thereby ensuring the quality of welding.

[0047] Immediately after the welding part is clamped and welded once, the driving block 427 is driven downward again by the clamping servo motor 41, so that the swing arm 423 increases the driving force on the two welding arms 43 again through the rotating plate 424 and the first connecting plate 425, so that the air is squeezed out when the weld point is not yet completely solidified, thereby eliminating the long strip pores between the weld points, ensuring the firmness of the welding electricity, and further improving the quality and effect of welding.

[0048] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for through-wall welding of tubular batteries, comprising a frame (1), characterized in that: The frame (1) is fixedly connected to a fixing plate (2), the frame (1) is provided with a lifting assembly (3), the lifting assembly (3) is connected to a welding assembly (4), and the frame (1) is also provided with a conveying assembly (5) and a positioning assembly (6); The lifting assembly (3) is used to drive the welding assembly (4) to move up and down so that the welding assembly (4) can be accurately aligned with the part to be welded; The welding assembly (4) comprises a clamping servo motor (41) fixedly connected to the top of the frame (1), the output end of the clamping servo motor (41) is connected to a first transmission mechanism connected to the frame (1), the first transmission mechanism is connected to a clamping mechanism (42) connected to the frame (1), and the welding assembly (4) further comprises two welding arms (43) symmetrically rotatably connected to the frame (1), and the clamping mechanism (42) is used to drive the two welding arms (43) to rotate in a direction away from or towards each other.

2. A device for through-wall welding of tubular batteries according to claim 1, characterized in that: The lifting assembly (3) comprises a lifting servo motor (31) fixedly connected to the top of the frame (1), the output end of the lifting servo motor (31) is connected to a second transmission mechanism, and the second transmission mechanism is connected to a first mounting plate (34). The lifting assembly (3) also comprises two slide rails (32) symmetrically fixedly connected to the front side of the fixing plate (2).

3. A device for through-wall welding of tubular batteries according to claim 2, characterized in that: Two groups of moving blocks (33) are symmetrically fixedly connected to the two slide rails (32); the back of the first mounting plate (34) is fixedly connected to the front of the two groups of moving blocks (33); and the clamping mechanism (42) is connected to the first mounting plate (34).

4. A device for through-wall welding of tubular batteries according to claim 3, characterized in that: The clamping mechanism (42) comprises two transverse plates (421) symmetrically fixedly connected to the front face of the first mounting plate (34); two mounting grooves are symmetrically provided on the side faces of the two transverse plates (421) that are away from each other; two swing arms (423) are symmetrically rotationally connected between the front and rear inner side walls of the two mounting grooves via two rotating shafts (422); the clamping mechanism (42) further comprises two rotating plates (424) symmetrically rotationally connected to the front face of the first mounting plate (34); the two rotating plates (424) are distributed in an eight-shaped shape; and two first connecting plates (425) are symmetrically fixedly connected to the side faces of the two rotating plates (424) that are close to each other.

5. A device for through-wall welding of tubular batteries according to claim 4, characterized in that: An elastic member (426) is fixedly connected between adjacent sides of the two first connecting plates (425), the two welding arms (43) are symmetrically fixedly connected to the bottoms of the two first connecting plates (425), and the clamping mechanism (42) further includes a driving block (427) fixedly connected to the bottom of the first transmission mechanism.

6. The device for through-wall welding of tubular batteries according to claim 5, characterized in that: The driving block (427) is an inverted isosceles trapezoid, the top ends of the two swing arms (423) respectively contact the two oblique waist surfaces of the driving block (427), and the bottom ends of the two swing arms (423) respectively contact the side surfaces of the two rotating plates (424) that are away from each other.

7. The device for through-wall welding of tubular batteries according to claim 6, characterized in that: The clamping mechanism (42) further comprises two vertical plates (428) symmetrically fixedly connected to the front face of the first mounting plate (34); two limiting grooves (429) are symmetrically provided on the side faces of the two vertical plates (428) that are away from each other; the two swing arms (423) symmetrically penetrate the two limiting grooves (429); and the front and rear side faces of the swing arms (423) are respectively in contact with the front and rear inner side walls of the limiting grooves (429).

8. The device for through-wall welding of tubular batteries according to claim 7, characterized in that: The upper and lower ends of the swing arm (423) are symmetrically rotatably connected to two rollers (4210), and the outer circumferential surfaces of the two rollers (4210) are respectively tightly pressed against the inclined waist surface of the driving block (427) and the side surface of the rotating plate (424).

9. The device for through-wall welding of tubular batteries according to claim 8, characterized in that: The positioning assembly (6) comprises a front-rear adjustment mechanism (61) fixedly connected to the frame (1), and a positioning plate (62) is fixedly connected to the front end of the front-rear adjustment mechanism (61). The positioning plate (62) is located above the conveying assembly (5).

10. The operating method of the device for through-wall welding of tubular batteries according to claim 9, characterized in that: The following steps are involved: The electromagnet block (611) is powered off, and the electromagnet block (611) no longer absorbs the push plate (612). Then, the two push plates (612) can be pushed forward and backward through the rectangular groove (613) and the limiting block to accurately and conveniently adjust the front and rear positions of the positioning plate (62) according to the size of the tubular battery. Then, the tubular battery to be welded is placed on the top of the unpowered roller, and then the battery and the positioning plate (62) are in front contact, so that the positioning plate (62) can assist in completing the front and rear positioning of the tubular battery. Then, the tubular battery is pushed to move left and right on the unpowered roller, and the auxiliary laser locator (44) is turned on to align the center of the tubular battery with the center between the two welding arms (43), thus completing the battery positioning operation; Then, the lifting servo motor (31) is started through the operating table (9), and the lifting servo motor (31) can drive the welding arm (43) to move up and down more stably through the second transmission mechanism, the slide rail (32) and the moving block (33), thereby ensuring the adjustment accuracy of the lifting height of the welding arm (43), so that the welding arm (43) can be more accurately aligned with the welding part, thereby improving the quality and effect of welding; Then, the clamping servo motor (41) is started, and the clamping servo motor (41) drives the driving block (427) to move up and down through the first transmission mechanism, and the driving block (427) drives the bottom ends of the two swing arms (423) to rotate in a direction away from or close to each other, so that the two swing arms (423) can be driven to stably separate from the welding part or clamp the welding part in cooperation with the elastic member (426), thereby ensuring the quality of welding; Immediately after the welding part is clamped and welded once, the driving block (427) is driven downward again by the clamping servo motor (41), so that the swing arm (423) increases the driving force on the two welding arms (43) again through the rotating plate (424) and the first connecting plate (425), so that the air is squeezed out when the welding point is not completely solidified, thereby eliminating the long strip pores between the welding points, ensuring the firmness of the welding electricity, and further improving the quality and effect of welding.

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