A cover plate laser welding device for battery packaging

Abstract

The present invention relates to the field of welding, and specifically to a cover plate laser welding device for battery packaging, comprising: an operating table; a panel fixedly connected to the operating table; a support frame a fixedly connected to the operating table; a mold arranged on the support frame a; a connecting column arranged on the operating table; a limit frame slidably connected to the operating table; a bracket fixedly connected to the operating table; a screw a rotatably connected to the bracket; a motor a fixedly connected to the bracket; a support frame b fixedly connected to the operating table; a laser welding gun arranged on the support frame b, and the laser welding gun welds the seams between the cover plate materials. The present invention folds the cover plate material with the mold by setting a movable limit frame to cooperate with the mold, so that the cover plate material is folded with the mold as the shape, thereby improving the accuracy of the folding angle of the cover plate material, and improving the welding sealing of the battery cover plate of the present invention.

Description

Technical Field

[0001] The invention relates to the field of welding, and in particular to a cover plate laser welding device for battery packaging. Background Art

[0002] The battery cover is a key component in the battery packaging structure. It is responsible for building a closed battery cavity, which contains the battery structure and electrochemical materials and protects these contents. During production, five cover plates are combined into a cubic shell, and then these cover plates are sealed and welded by laser welding technology to form a semi-finished battery cover. One side of this semi-finished product has an opening to facilitate the subsequent filling of the battery contents. After the contents are filled, the open side is closed to complete the entire battery packaging process.

[0003] Before welding the semi-finished products, in order to simplify the operation and ensure the accuracy of welding, the cover plates are usually pre-joined into a whole by spot welding, and then the pre-joined whole is folded, and the seams between the plates are welded after the folding is completed. This method can ensure that the position of each cover plate is relatively stable, thereby improving the accuracy of battery cover welding.

[0004] However, in the current folding process, the hard connection formed by spot welding makes it difficult to fold the cover plate, and the accuracy of the folding angle is extremely high. Once the folding angle deviates, the semi-finished battery cover plate is easily deformed, resulting in the seams between the plates that are not fixed by spot welding cannot be aligned, which in turn affects the welding seal of the battery cover plate. Therefore, in the welding process of the battery cover plate, there are still some problems that cannot be ignored. Summary of the invention

[0005] In view of the above problems, the present invention proposes a laser welding device for a battery packaging cover plate that can accurately fold the plate material, aiming to improve the welding sealing performance of the battery cover plate.

[0006] A cover plate laser welding device for battery packaging comprises: an operating table; a panel fixedly connected to the operating table; a support frame a fixedly connected to the operating table; a mold arranged on the support frame a; a connecting column arranged on the operating table; a limit frame slidably connected to the operating table through the connecting column, the limit frame moves up and down to pass through the mold; a bracket fixedly connected to the operating table; a screw a rotatably connected to the bracket, the screw a is threadedly connected to the limit frame; a motor a fixedly connected to the bracket, the output shaft of the motor a is fixed to the screw a, and the motor a is electrically connected to the panel; a support frame b fixedly connected to the operating table; a laser welding gun arranged on the support frame b, the laser welding gun welds the seams between the cover plate materials.

[0007] Optionally, adsorption holes are provided below and in front of the mold; and the mold further comprises: an adsorption pump fixedly connected to the operating table; and a connecting pipe fixedly connected between the adsorption pump and the mold, the connecting pipe connecting the adsorption pump and the mold.

[0008] Optionally, the mold is rotatably connected to the support frame a, and also includes: a rack fixedly connected to the limit frame; a gear rotatably connected to the support frame a, the gear meshing with the rack, the length of the rack controls the gear to rotate a quarter of a turn, and the position of the rack makes the limit frame mesh with the gear when it is located below the mold; a ratchet gear rotatably connected to the support frame a, the ratchet gear is coaxially fixed with the mold; a pawl rotatably connected to the gear, the pawl abuts between the teeth of the ratchet gear, and a torsion spring b is fixed between the pawl and the gear; a stop block fixedly connected to the gear, the stop block is arranged on the side of the pawl.

[0009] Optionally, it also includes: a base bracket slidably connected to the lower part of the support frame a, the base bracket is located below the mold, and sliding grooves are provided on both sides of the limit frame. The limit frame limits the base bracket through the sliding grooves, and the base bracket can be detached from the limit frame from the lower part of the sliding groove; a spring a fixedly connected between the base bracket and the support frame a.

[0010] Optionally, it also includes: a rotating arm a rotatably connected to a support frame b; a motor b fixedly connected to the support frame b, the output end of the motor b is fixed to the rotating arm a, and the motor b is electrically connected to the panel; a screw b rotatably connected to the rotating arm a; a motor c fixedly connected to the rotating arm a, the output end of the motor c is fixed to the screw b, and the motor c is electrically connected to the panel; a moving seat slidably connected to the rotating arm a, the moving seat is threadedly connected to the screw b, and the laser welding gun is rotatably connected to the moving seat.

[0011] Optionally, it also includes: a placement rack fixedly connected to the operating table, and the rotating trajectory of the rotating arm a will revolve around the placement rack; a support frame c fixedly connected to the operating table, and the support frame c is located on the side of the mold; a rotating arm b rotatably connected to the support frame c, and the rotating arm b is located above the mold; an electric moving wheel fixedly connected to the end of the rotating arm b; a notch is provided on the side wall of the mold, and the notch provides space for the wheel part of the electric moving wheel; a pressure plate slidably connected to the rotating arm b, and the pressure plate can be contact-matched with the limit frame; a torsion spring a fixedly connected between the rotating arm b and the support frame c.

[0012] Optionally, it also includes: a roller rotatably connected to the placement rack, wherein the upper top surface of the roller is higher than the upper top surface of the placement rack.

[0013] Optionally, it also includes: a moving foot slidably connected to the operating table, the moving foot is located on the side of the mold; and a supporting foot fixedly connected to the moving foot.

[0014] The present invention has the following beneficial effects:

[0015] The present invention provides a movable limit frame to cooperate with the mold to fold the cover plate, so that the cover plate is folded according to the mold, the accuracy of the folding angle of the cover plate is improved, and the welding seal of the battery cover of the present invention is improved; the present invention provides a limit frame to drive the mold to rotate, so that the cover plate can automatically change direction, thereby improving the convenience of the folding process of the present invention; the cover plate is fixed on the mold by providing an adsorption pump in cooperation with the adsorption hole, and the cover plate can be stably fixed on the mold, and the bottom support is provided to assist in fixing, so as to ensure the accuracy of the limit frame in controlling the folding of the cover plate and ensure the folding quality of the present invention; the present invention provides a movable laser welding gun to weld the seams of the cover plate, thereby improving the convenience of the welding process of the present invention; the present invention provides an electric shift wheel that can transfer the cover plate to the welding, and the control of the electric shift wheel is controlled by the movable transmission of the limit frame, thereby improving the convenience of docking between the folding process and the welding process of the present invention; the present invention provides a support foot to position the loading position of the cover plate, thereby improving the accuracy of the loading of the cover plate of the present invention and providing convenience for the loading of the cover plate of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only for the present invention to protect some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the position structure of the connecting mechanism, the folding mechanism and the flipping mechanism in the present invention.

[0019] Figure 3 It is a schematic diagram of the connection structure of the connection mechanism and the flipping mechanism in the present invention.

[0020] Figure 4 It is a schematic diagram of the connection structure of the connecting mechanism, the folding mechanism and the base in the present invention.

[0021] Figure 5 It is a structural schematic diagram of the folding cover plate of the folding mechanism in the present invention.

[0022] Figure 6 It is a schematic diagram of the structure of the cover plate in four stages during the folding process of the cover plate in the present invention.

[0023] Figure 7 It is a schematic diagram of the connection structure of the welding mechanism in the present invention.

[0024] Figure 8It is a schematic diagram of the position structure of the moving mechanism, welding mechanism and mold in the present invention.

[0025] Fig. 9 It is a schematic diagram of the coordination structure between the moving mechanism and the limiting frame in the present invention.

[0026] Fig.10 It is a schematic diagram of the position structure of the movable foot, the support foot and the mold in the present invention.

[0027] The markings in the attached drawings are: 0: cover plate; 101: operating table; 102: panel; 201: support frame a; 202: mold; 203: adsorption hole; 204: adsorption pump; 205: connecting pipe; 301: connecting column; 302: limit frame; 303: bracket; 304: screw a; 305: motor a; 401: rack; 402: gear; 403: ratchet gear; 404: ratchet; 405: stop block; 501: Bottom support; 502: spring a; 601: support frame b; 602: rotating arm a; 603: motor b; 604: screw b; 605: motor c; 606: moving seat; 607: laser welding gun; 701: placement frame; 702: roller; 703: support frame c; 704: rotating arm b; 705: electric moving wheel; 706: notch; 707: pressure plate; 708: torsion spring a; 801: moving foot; 802: support foot. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. 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.

[0029] Embodiment: A laser welding device for a battery packaging cover, see Figure 1 , including: an operating table 101; a panel 102 fixedly installed on the operating table 101, the panel 102 is used to control the use of the device; also includes: a connecting mechanism installed on the operating table 101 for controlling the fixing of the cover plate material 0; a folding mechanism installed on the operating table 101 for cooperating with the connecting mechanism to fold the cover plate material 0; a flipping mechanism installed on the operating table 101 for controlling the connecting mechanism to flip the cover plate material 0; a welding mechanism installed on the operating table 101 for welding the cover plate material 0; a moving mechanism installed on the operating table 101 for moving the folded cover plate material 0 to be welded.

[0030] See also Figure 2-Figure 5The connecting mechanism includes: a support frame a201 fixedly installed at the rear of the operating table 101; a mold 202 rotatably installed on the support frame a201, and the cover plate material 0 will be folded according to the mold 202 to ensure the accuracy of the folding angle of the cover plate material 0, and the opening of the semi-finished product of the cover plate material 0 after folding along the mold 202 faces backward; adsorption holes 203 are opened below and in front of the mold 202; an adsorption pump 204 fixedly installed at the rear of the operating table 101; a connecting pipe 205 fixedly installed between the adsorption pump 204 and the mold 202, the connecting pipe 205 connects the adsorption pump 204 and the mold 202, and when the adsorption pump 204 is started, it will adsorb the cover plate material 0 through the adsorption holes 203 on the mold 202, thereby stably fixing the cover plate material 0 on the mold 202.

[0031] See also Figure 2-Figure 5 The folding mechanism includes: a connecting column 301 arranged on the operating table 101; a limit frame 302 slidably installed on the operating table 101 through the connecting column 301, the limit frame 302 moves up and down to pass through the mold 202, so that the folded cover plate 0 is close to the mold 202, and there are three connecting columns 301, one of which is fixedly installed on the operating table 101 and slidably installed with the limit frame 302, and the other two are fixedly installed on the limit frame 302 and slidably installed with the operating table 101; a bracket 303 fixedly installed on the operating table 101; a screw a304 rotatably installed on the bracket 303, and the screw a304 is threadedly connected to the limit frame 302; a motor a305 fixedly installed on the bracket 303, the output shaft of the motor a305 is fixed to the screw a304, the motor a305 drives the screw a304 to rotate, and controls the limit frame 302 to move up and down, and the motor a305 is electrically connected to the panel 102.

[0032] See also Figure 2-Figure 5The flipping mechanism includes: a rack 401 fixedly mounted on the limit frame 302 through a connecting column 301, and the rack 401 moves up and down with the limit frame 302; a gear 402 mounted on a support frame a201 is rotated, and the gear 402 is meshed with the rack 401. The rack 401 moves up and down, and the gear 402 rotates forward and reversely. The length of the rack 401 controls the gear 402 to rotate a quarter of a circle. The position of the rack 401 makes the limit frame 302 mesh with the gear 402 when it is located below the mold 202; a ratchet gear 403 mounted on the support frame a201 is rotated. The ratchet gear 403 is coaxially fixed with the mold 202; a pawl 404 is rotatably mounted on the gear 402, the pawl 404 abuts between the teeth of the ratchet gear 403, the pawl 404 limits the ratchet gear 403 to rotate only in one direction relative to the gear 402, three pawls 404 are provided, a torsion spring b is fixedly installed between the pawl 404 and the gear 402, the torsion spring b is used to restore the position of the pawl 404; a stop block 405 is fixedly mounted on the gear 402, three stop blocks 405 are provided, which are respectively arranged on the side of each pawl 404 to limit the rotation position of each pawl 404.

[0033] Place the cover plate 0 after spot welding under the mold 202, start the adsorption pump 204, fix the cover plate 0 at the bottom of the mold 202, start the motor a305, control the limit frame 302 to move up, refer to Figure 5 , the front side and the left side (including the folded upper side and right side) of the cover plate material 0 are folded upward by the limit frame 302. Under the restriction of the mold 202 and the limit frame 302, the front side and the lower side, and the left side and the lower side of the cover plate material 0 can be folded at a standard ninety degree. At the same time, during this process, the rack 401 controls the rotation of the gear 402, and the gear 402 drives the pawl 404 to rotate relative to the ratchet gear 403. However, since the pawl 404 will be squeezed by the tooth slope of the ratchet gear 403 in this moving direction, the torsion spring b is twisted. After the pawl 404 is disengaged from the teeth of the ratchet gear 403, the torsion spring b is reset to make the pawl 404 abut against the next tooth space of the ratchet gear 403. Therefore, the ratchet gear 403 is not controlled to rotate by the gear 402, and the mold 202 is stationary.

[0034] On the contrary, when the limit frame 302 moves downward, after the limit frame 302 passes through the mold 202 and is below the mold 202, the rack 401 drives the gear 402 to reverse, and the moving direction of the pawl 404 at this time will be resisted by the resisting block 405. Therefore, the pawl 404 will resist the teeth of the ratchet gear 403 to drive the ratchet gear 403 to rotate, so that the gear 402 controls the ratchet gear 403 to rotate 90 degrees through the pawl 404, thereby controlling the mold 202 and the cover plate material 0 to change direction by 90 degrees, so that the limit frame 302 can fold the upper side of the cover plate material 0 during the next upward movement;

[0035] That is, the complete folding process of the cover plate 0 is shown in Figure 6 Stage one is the initial state of the cover plate material 0 being delivered into the device. After the first folding process, the state of stage two is formed. After that, the state of stage four is finally formed. That is, after controlling the limit frame 302 to move up and down four times, the device can complete all the folding steps of the cover plate material 0.

[0036] See also Figure 4-Figure 5 , and also includes: a base support 501 slidably installed at the lower part of the support frame a201, the base support 501 is located below the mold 202, and slide grooves are provided on both sides of the limit frame 302. The limit frame 302 will limit the base support 501 through the slide grooves, and the base support 501 can be detached from the limit frame 302 from the lower part of the slide groove; a spring a502 fixedly installed between the base support 501 and the support frame a201.

[0037] When the limit frame 302 moves downward, the bottom support 501 will be driven downward, and the spring a502 will be compressed; when the limit frame 302 moves upward, the spring a502 resets and moves the bottom support 501 upward, so that the bottom support 501 can support the cover plate material 0, especially after the mold 202 rotates, the adsorption hole 203 thereon is not in the lower position. When the limit frame 302 moves upward to fold the cover plate material 0, the bottom support 501 can be supported by the cover plate material 0 under the action of the spring a502, and the cover plate material 0 is closely attached to the mold 202, thereby improving the accuracy of the limit frame 302 in folding the cover plate material 0.

[0038] See also Figure 7 The welding mechanism includes: a support frame b601 fixedly mounted on the front of the operating table 101; a rotating arm a602 rotatably mounted on the support frame b601; a motor b603 fixedly mounted on the support frame b601, the output end of the motor b603 is fixed to the rotating arm a602, the motor b603 controls the rotating arm a602 to rotate, and the motor b603 is electrically connected to the panel 102; a screw b604 rotatably mounted on the rotating arm a602; a motor c603 fixedly mounted on the rotating arm a602 5. The output end of the motor c605 is fixed to the screw b604, the motor c605 is electrically connected to the panel 102, and the motor c605 controls the rotation of the screw b604; the moving seat 606 is slidably installed on the rotating arm a602, the moving seat 606 is threadedly connected to the screw b604, and the screw b604 rotates forward and backward to control the moving seat 606 to move forward and backward; the laser welding gun 607 installed on the moving seat 606 is rotated, and the rotation of the laser welding gun 607 can adjust the angle of the laser welding gun 607 toward the cover plate 0.

[0039] Place the cover plate material 0 at the position of the laser welding gun 607, rotate and adjust the gun head of the laser welding gun 607 to face the front upper left corner of the cover plate material 0, control the starting motor b603 and the motor c605, so that after each quarter rotation of the rotating arm a602, the screw b604 controls the laser welding gun 607 to move back and forth once, that is, the laser welding gun 607 welds each seam of the cover plate material 0, namely, the seam between the front side and the upper side, the seam between the upper side and the right side, the seam between the front side and the right side, the seam between the right side and the lower side, the seam between the front side and the lower side, the seam between the lower side and the left side, the seam between the front side and the left side, and the seam between the left side and the upper side.

[0040] See also Figure 8-Figure 9 The moving mechanism includes: a placement rack 701 fixedly mounted on the operating table 101, and the moving trajectory of the rotating arm a602 will revolve around the placement rack 701; a roller 702 rotatably mounted on the placement rack 701, and the upper top surface of the roller 702 is higher than the upper top surface of the placement rack 701; a support rack c703 fixedly mounted on the operating table 101, and the support rack c703 is located on the right side of the mold 202; a rotating arm b704 rotatably mounted on the support rack c703, and the rotating arm b704 is located above the mold 202; an electric moving wheel 705 fixedly mounted at the end of the rotating arm b704; the mold 20 2 is provided with notches 706 on the upper side, left side and right side, the notches 706 provide space for the wheel portion of the electric moving wheel 705 so that the electric moving wheel 705 does not contact the mold 202; a pressing plate 707 slidably mounted on the rotating arm b704, the pressing plate 707 is slidably connected to the operating table 101, a protrusion is provided at the bottom of the pressing plate 707, the limit frame 302 can contact the protrusion, so that when the limit frame 302 moves downward, the protrusion of the pressing plate 707 can control the rotating arm b704 to rotate downward; a torsion spring a708 is fixedly mounted between the rotating arm b704 and the support frame c703.

[0041] Since the cover plate 0 is folded only after the cover plate 0 is folded, there is a cover plate 0 above the mold 202. Figure 6Only in the fourth stage is there a cover plate 0 above the mold 202, so this feature can be used to discharge the material, and the electric shift wheel 705 is started to control the rotation of its wheel part. During the four reciprocating movements of the limit frame 302 to fold the same cover plate 0, during the first three reciprocating movements, the limit frame 302 controls the rotating arm b704 to rotate downward to make the electric shift wheel 705 move downward, and the electric shift wheel 705 will enter the slot 706 without any effect. When the limit frame 302 performs the fourth reciprocating movement, the limit frame 30 The electric moving wheel 705 is controlled to move downward, so that the electric moving wheel 705 contacts the cover plate 0, and the rotating wheel of the electric moving wheel 705 can push the cover plate 0 forward, and move the cover plate 0 onto the placement rack 701. The roller 702 on the placement rack 701 assists the cover plate 0 to move forward smoothly until the cover plate 0 is separated from the electric moving wheel 705, and the cover plate 0 stops moving. The cover plate 0 is moved from the mold 202 to the placement rack 701, and then the laser welding gun 607 can be controlled to weld the cover plate 0.

[0042] See also Fig.10 , further comprising: a moving foot 801 slidably mounted on the operating table 101, the moving foot 801 being located on the left side of the mold 202; and a support foot 802 fixedly mounted on the moving foot 801. The support foot 802 can assist in locating the position where the cover plate material 0 is added to the mold 202, improve the loading accuracy of the cover plate material 0, and provide convenience for loading the cover plate material 0.

[0043] The embodiments of this specific implementation are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. The same components are represented by the same reference numerals. Therefore, any equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A laser welding device for a battery packaging cover, characterized in that: include: An operating table (101); a panel (102) fixedly connected to the operating table (101), the panel (102) being used to control the use of the welding device; a support frame a (201) fixedly connected to the operating table (101); a mold (202) arranged on the support frame a (201), the cover plate material (0) being folded using the mold (202) as a shape; a connecting column (301) arranged on the operating table (101); a limit frame (302) slidably connected to the operating table (101) via the connecting column (301), the limit frame (302) moving up and down to pass through the mold (202) so that the folded cover plate material (0) is close to the mold ( 202); a bracket (303) fixedly connected to the operating table (101); a screw a (304) rotatably connected to the bracket (303), the screw a (304) being threadedly connected to the limit frame (302); a motor a (305) fixedly connected to the bracket (303), the output shaft of the motor a (305) being fixed to the screw a (304), the motor a (305) being electrically connected to the panel (102); a support frame b (601) fixedly connected to the operating table (101); a laser welding gun (607) disposed on the support frame b (601), the laser welding gun (607) welding the seams between the cover plate materials (0); Adsorption holes (203) are provided below and in front of the mold (202); the mold (202) further comprises: an adsorption pump (204) fixedly connected to the operating table (101); a connecting pipe (205) fixedly connected between the adsorption pump (204) and the mold (202); the connecting pipe (205) connects the adsorption pump (204) and the mold (202); the adsorption pump (204) controls the mold (202) to adsorb and fix the cover plate (0); The mold (202) is rotatably connected to the support frame a (201), and further comprises: a rack (401) fixedly connected to the limit frame (302); a gear (402) rotatably connected to the support frame a (201), the gear (402) meshing with the rack (401), the length of the rack (401) controlling the gear (402) to rotate a quarter of a turn, the position of the rack (401) causing the limit frame (302) to mesh with the gear (402) when it is located below the mold (202); A ratchet gear (403) on the support frame a (201), the ratchet gear (403) and the mold (202) are coaxially fixed; a ratchet pawl (404) rotatably connected to the gear (402), the ratchet pawl (404) abuts between the teeth of the ratchet gear (403), and a torsion spring b is fixedly connected between the ratchet pawl (404) and the gear (402); and a stop block (405) fixedly connected to the gear (402), the stop block (405) is arranged on the side of the ratchet pawl (404) to limit the rotation position of each ratchet pawl (404).

2. A laser welding device for a battery packaging cover according to claim 1, characterized in that: Also includes: A bottom bracket (501) is slidably connected to the lower part of the support frame a (201), the bottom bracket (501) is located below the mold (202), and sliding grooves are provided on both sides of the limit frame (302). The limit frame (302) limits the bottom bracket (501) through the sliding grooves, and the bottom bracket (501) can be separated from the limit frame (302) from the lower part of the sliding grooves; a spring a (502) is fixedly connected between the bottom bracket (501) and the support frame a (201).

3. A laser welding device for a battery packaging cover according to claim 2, characterized in that: Also includes: A rotating arm a (602) rotatably connected to a support frame b (601); a motor b (603) fixedly connected to the support frame b (601), the output end of the motor b (603) being fixed to the rotating arm a (602), and the motor b (603) being electrically connected to the panel (102); a screw rod b (604) rotatably connected to the rotating arm a (602); a motor c (605) fixedly connected to the rotating arm a (602), the output end of the motor c (605) being fixed to the screw rod b (604), and the motor c (605) being electrically connected to the panel (102); a moving seat (606) slidably connected to the rotating arm a (602), the moving seat (606) being threadedly connected to the screw rod b (604), and a laser welding gun (607) being rotatably connected to the moving seat (606), so that the angle of the laser welding gun (607) toward the cover plate (0) can be adjusted.

4. A battery packaging cover laser welding device according to claim 3, characterized in that: Also includes: A placement rack (701) fixedly connected to the operating table (101), the moving trajectory of the rotating arm a (602) will revolve around the placement rack (701); a support rack c (703) fixedly connected to the operating table (101), the support rack c (703) is located on the side of the mold (202); a rotating arm b (704) rotatably connected to the support rack c (703), the rotating arm b (704) is located above the mold (202); an electric moving wheel (705) fixedly connected to the end of the rotating arm b (704); the mold (202) A notch (706) is provided on the side wall, the notch (706) providing space for the wheel portion of the electric moving wheel (705) so that the electric moving wheel (705) avoids contact with the mold (202); a pressing plate (707) slidably connected to the rotating arm b (704), the pressing plate (707) being capable of contacting with the limit frame (302) so that the limit frame (302) moves through the pressing plate (707) to convert the rotating arm b (704) to rotate; and a torsion spring a (708) fixedly connected between the rotating arm b (704) and the support frame c (703).

5. A laser welding device for a battery packaging cover according to claim 4, characterized in that: Also includes: A roller (702) is rotatably connected to the placement rack (701) and is used to assist the cover plate (0) in moving, wherein the upper top surface of the roller (702) is higher than the upper top surface of the placement rack (701).

6. A laser welding device for a battery packaging cover according to claim 5, characterized in that: Also includes: A movable foot (801) slidably connected to the operating table (101), the movable foot (801) being located on a side of the mold (202); A support foot (802) is fixedly connected to the moving foot (801).

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