Integrated device for assembling and laser welding of lithium battery cover plate and control method

Abstract

The invention discloses a lithium battery cover plate assembling and laser welding integrated device which comprises a plurality of pressing mechanisms and a plurality of unlocking mechanisms, the pressing mechanisms are fixedly connected with a rotary disc and rotate along with the rotary disc, and the unlocking mechanisms are fixedly connected with a rack and do not rotate; when the turntable stops moving, the pressing mechanisms correspond to the unlocking mechanisms in position one by one; when the pressing mechanism arrives at the station of the unlocking mechanism, the unlocking mechanism moves inwards to decompress the pressing mechanism, and the part is placed; after the parts are placed, the unlocking mechanism moves outwards, and the pressing mechanism presses the parts; and laser welding is carried out after all the parts pass through the previous multiple stations and are finally and completely assembled in sequence. According to the invention, all parts forming the cover plate can be sequentially mounted and reliably pressed at all stations. And meanwhile, the positions of the parts are guaranteed, and the technological process and the equipment structure are simplified.

Description

Technical Field

[0001] The invention belongs to a carrier in an automobile power battery, an energy storage battery and a square battery cover assembly device. Background Art

[0002] At present, lithium battery cover is extremely important for ensuring the quality of lithium batteries. In order to ensure the final quality of lithium battery cover, the accuracy of the relative position of the related parts in the cover assembly, such as cover plate, sealing ring, pole, and mica sheet, needs to be ensured, and laser welding is performed later. Since the related parts are small and the number of assemblies is large, it is not suitable for manual operation, and manual operation is prone to deviation when placing the parts in sequence, so relevant devices are needed to facilitate the assembly and welding of lithium battery cover.

[0003] CN 113561495 A (publication date 2021.10.29) discloses a multi-station clamp for welding lithium battery cover plates, which can realize compression during assembly of parts, but has the following disadvantages: 1. The cylinder 401 is arranged at the lower part of the support ring 30. In order to ensure its installation and telescopic stroke, the height of the column 31 must be limited to a lower limit, which makes the overall height higher, which not only occupies a certain space but also affects the stability of the overall equipment; 2. The piston end of the cylinder 401 retracts, the top plate 403 moves down, and the vertical slide 202 drops rapidly due to the vertical tension spring 207 and its own gravity, driving the bottom support 203 to drop accordingly, so that the assembled parts placed on it also drop accordingly, and the position between the parts cannot be guaranteed, affecting the later welding quality; 3. The merging distance of the material clamp 206 is not limited, and the reliability is poor; 4. The cover plate is ultrasonically welded, and it needs to be supported by the bottom mold during the welding station, so this structure cannot be applied to laser welding. Summary of the invention

[0004] The problem to be solved by the present invention is to provide an integrated device for assembling and laser welding a lithium battery cover plate, which can sequentially install and reliably press the various parts that make up the cover plate at various stations. At the same time, the present invention ensures the position between the parts, simplifies the process flow and equipment structure. In addition, the present invention also provides a control method for the integrated device for assembling and laser welding a lithium battery cover plate.

[0005] The present invention discloses an integrated device for assembling and laser welding a lithium battery cover plate, which comprises a plurality of clamping mechanisms and a plurality of unlocking mechanisms. The clamping mechanisms are fixedly connected to a turntable and rotate with the turntable, while the unlocking mechanisms are fixedly connected to a frame and do not rotate. When the turntable stops, the positions of the clamping mechanisms and the unlocking mechanisms correspond one to one. When the clamping mechanism reaches the station of the unlocking mechanism, the unlocking mechanism moves inward to decompress the clamping mechanism and place the parts. After the parts are placed, the unlocking mechanism moves outward and the clamping mechanism clamps the parts. When all the parts are finally assembled through the previous multiple stations in sequence, laser welding is performed.

[0006] Furthermore, the clamping mechanism includes a cover positioning block, two left and right L-shaped pressure heads, two symmetrically arranged moving components, and two symmetrically arranged roller components. Each moving component includes an L-shaped mounting seat, a horizontal moving unit, and a vertical moving unit. The interior of the cover positioning block is fixedly connected to the turntable, and the exterior is for placing the cover portion; the L-shaped mounting seat is located at the bottom of the cover positioning block, and is connected to the cover positioning block through the horizontal moving unit; the L-shaped pressure head is located on the left and right sides of the cover positioning block, its horizontal side is located at the upper side of the cover positioning block for placing the cover portion, and its vertical side is connected to the L-shaped mounting seat through the vertical moving unit; the roller assembly is connected to the L-shaped pressure head and the L-shaped mounting seat.

[0007] Furthermore, the transverse moving unit includes a transverse guide rail, a transverse slider, two front and rear tension spring units, each spring unit includes a transverse tension spring, a small connecting block I, and a small connecting block II; the vertical moving unit includes a vertical slider, a vertical guide rail, two front and rear tension spring units, each tension spring unit includes a vertical tension spring, a small connecting block III, and a small connecting block IV; the transverse guide rail is fixed below the cover plate positioning block, the transverse slider is fixed above the horizontal side of the L-shaped mounting seat, and the transverse slider cooperates with the transverse guide rail; the small connecting block I is fixed below the cover plate positioning block, The small connecting block II is fixed to the upper part of the outer side surface of the vertical side of the L-shaped mounting seat, and the two ends of the transverse tension spring are respectively connected to the open grooves on the small connecting block I and the small connecting block II; the vertical slider is fixed to the inner side surface of the vertical side of the L-shaped pressure head, the vertical guide rail is fixed to the outer side surface of the vertical side of the L-shaped mounting seat, and the vertical slider cooperates with the vertical guide rail; the small connecting block III is fixed to the bottom of the horizontal side of the L-shaped pressure head, the small connecting block IV is fixed to the middle part of the outer side surface of the vertical side of the L-shaped mounting seat, and the two ends of the vertical tension spring are respectively connected to the open grooves on the small connecting block III and the small connecting block IV.

[0008] Furthermore, the roller assembly includes a transverse roller mounting seat, a transverse roller, and a vertical roller. The transverse roller mounting seat is fixedly connected to the lower part of the inner side surface of the vertical side of the L-shaped mounting plate, and the transverse roller is connected to the transverse mounting seat; the vertical roller is connected to the lower part of the vertical side of the L-shaped pressure head; the unlocking mechanism includes a connecting plate, a cylinder, two guide rails, an unlocking push plate, and two small push plates; the connecting plate is fixed to the frame, the cylinder and the left and right guide rails are all fixed on the connecting plate, and the two guide rails are located on the left and right sides of the cylinder; the middle part of the unlocking push plate is connected to the rod part of the cylinder, and its left and right ends are connected to the guide rail through the lower slider, and the two small push plates are symmetrically fixed on the unlocking push plate; the surface of the unlocking push plate opposite to the clamping mechanism is the inclined vertical roller contact surface, and the surface of the two small push plates opposite to the clamping mechanism is the inclined transverse roller contact surface.

[0009] Furthermore, the roller assembly also includes a universal wheel mounting seat and a universal wheel. The universal wheel mounting seat is fixedly connected to the lower part of the outer side surface of the vertical side of the L-shaped pressure head, and the universal wheel is connected to the universal wheel mounting seat; the lowest part of the universal wheel rotating surface is lower than the lower busbar of the vertical roller rotating surface.

[0010] Furthermore, the clamping mechanism also includes a pressure head copper nozzle, which is fixed at the lower part of the inner hole of the L-shaped pressure head, and the pressure head copper nozzle is a contoured pressure head.

[0011] Furthermore, the moving assembly also includes a limit unit, which includes a large connecting seat, two small connecting seats, two rivets, and two positioning bolts. The large connecting seat is fixed under the cover plate positioning block and is located in the middle of the left and right transverse guide rails. A rivet is connected to each of the left and right end surfaces of the large connecting seat. The two small connecting seats are respectively fixed under the horizontal sides of the two L-shaped mounting seats. The positioning bolt passes through the small connecting seat and its end face is opposite to the rivet.

[0012] Furthermore, the integrated device for assembly and laser welding also includes a detection unit, which includes left and right blocks, left and right mounting seats, and left and right sensors; the two blocks are respectively fixed on the horizontal sides of the two L-shaped mounting seats and are symmetrically arranged on the left and right sides, the mounting bar is fixed on the connecting plate, and the sensor is fixed on the upper part of the mounting bar and is arranged opposite to the block in front and behind.

[0013] The present invention provides a control method for an integrated device for assembling and laser welding a lithium battery cover plate, which comprises the following steps: step 1, a turntable drives a clamping mechanism to rotate to an unlocking mechanism position; step 2, the cylinder works to push the unlocking push plate to move inward, the vertical roller contact surface contacts the vertical roller, and the left and right L-shaped pressure heads are pushed to move upward; when the L-shaped pressure head stops moving upward, the transverse roller contact surface contacts the transverse roller, and the left and right L-shaped pressure heads are pushed to move outward at the same time, and the parts are placed on the cover plate positioning block; step 3, after the parts are placed, the cylinder works to push the unlocking push plate to move outward, and the transverse tension spring drives the left and right L-shaped pressure heads to move inward to achieve merging; the vertical tension spring force drives the left and right L-shaped pressure heads to move downward, so that the inside of the transverse side of the L-shaped pressure head presses the parts on the cover plate positioning block; step 4, the turntable drives the clamping mechanism to rotate to the next unlocking mechanism position, repeats the above actions, and places the next part.

[0014] Furthermore, the number of the clamping mechanisms and the unlocking mechanisms is the same as the number of the cover plate parts, ensuring that all parts are assembled when arriving at the last welding station.

[0015] The advantages of the integrated device for assembling and laser welding a lithium battery cover plate of the present invention are: 1. The left and right L-shaped pressing heads can move up, down, left and right, so as to realize the assembly of different parts, and as the height after assembly increases, the L-shaped pressing head can always reliably press and limit the parts; 2. The cylinder is horizontally arranged, and its horizontal push unlocking push plate moves inward and outward, and there is no requirement for the overall height of the frame, the space occupied can be small and the overall stability is good; at the same time, when the workpiece is placed, the L-shaped pressing head is realized by moving upward and outward, while the cover plate positioning block for placing the parts is kept stable and motionless, thereby ensuring the position between the parts and thus ensuring the quality of subsequent welding; 3. The position where the L-shaped pressing head stops when moving inward and merging can be adjusted to ensure reliability; 4. The detection unit detects the reliability of the opening and merging work of the L-shaped pressing head to prevent damage to the equipment; 5. The L-shaped pressing head integrates a pressing head copper nozzle as a welding pressing head, which presses the position to be welded for laser welding after the assembly is completed, thereby simplifying the process flow and equipment structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This invention is a schematic diagram Figure 1 (The clamping mechanism is separated from the unlocking mechanism).

[0017] Figure 2 This invention is a schematic diagram Figure 2 (The clamping mechanism is in contact with the unlocking mechanism).

[0018] Figure 3 is a schematic diagram of the clamping mechanism.

[0019] Figure 4is a schematic diagram of the unlocking mechanism.

[0020] Figure 5 This is a schematic diagram of the compression after the cover body is installed.

[0021] Figure 6 This is a schematic diagram of the compression after the pole and sealing ring are installed.

[0022] Figure 7 This is a schematic diagram of the compression after the mica sheet is installed.

[0023] Figure 8 This is a schematic diagram of the welding ring after installation without tightening.

[0024] Fig. 9 This is a schematic diagram of the welding ring after installation and tightening.

[0025] Fig.10 This is a schematic diagram of laser welding. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Example 1

[0028] from Figure 1 , Figure 2 It can be seen that the present invention is an integrated device for assembling and laser welding a lithium battery cover plate, which includes multiple clamping mechanisms and multiple unlocking mechanisms. The clamping mechanism is fixedly connected to the turntable 1 and rotates with the turntable 1, and the unlocking mechanism is fixedly connected to the frame 2 and does not rotate; when the turntable stops, the positions of the clamping mechanism and the unlocking mechanism correspond one to one; when the clamping mechanism comes to the station of the unlocking mechanism, the unlocking mechanism moves inward to decompress the clamping mechanism and place the parts; after the parts are placed, the unlocking mechanism moves outward and the clamping mechanism clamps the parts; when all the parts are finally assembled through the previous multiple stations in sequence, laser welding is performed.

[0029] When the lithium battery cover is assembled, the assembly equipment is an internally rotating turntable 1 and an externally fixed frame 2. Multiple unlocking mechanisms are fixed on the frame 2 and do not rotate with the turntable. Multiple clamping mechanisms are fixedly connected to the turntable 1 and rotate with the turntable. When the turntable drives the clamping mechanism to rotate to the unlocking mechanism position, the unlocking mechanism is actuated to open the clamping mechanism to load the parts. After the loading is completed, the unlocking mechanism leaves. When the clamping mechanism presses the parts and rotates to the next unlocking mechanism, the next unlocking mechanism is actuated to open the clamping mechanism to load the next part. After the loading is completed, the unlocking mechanism leaves and the clamping mechanism presses the next part until all parts are assembled and welded.

[0030] Example 2

[0031] like Figure 1 , Figure 2 , Figure 3 As shown, the present invention is an integrated device for assembly and laser welding: the clamping mechanism includes a cover positioning block 10, two left and right L-shaped pressing heads 11, two symmetrically arranged moving components on the left and right, and two symmetrically arranged roller components on the left and right, each moving component includes an L-shaped mounting seat 12, a horizontal moving unit, and a vertical moving unit. The interior of the cover positioning block 10 is fixedly connected to the turntable, and the exterior is for placing the cover portion; the L-shaped mounting seat 12 is located at the bottom of the cover positioning block 10, and is connected to the cover positioning block 10 through the horizontal moving unit; the L-shaped pressing head 11 is located at the left and right sides of the cover positioning block 10, its horizontal side is located at the upper side of the cover positioning block 10 where the cover portion is placed, and its vertical side is connected to the L-shaped mounting seat 12 through the vertical moving unit; the roller assembly is connected to the L-shaped pressing head 11 and the L-shaped mounting seat 12.

[0032] The battery cover is placed in the cover positioning block 10, and the L-shaped pressing head 11 is moved left and right and up and down through the roller assembly, the vertical moving unit, and the horizontal moving unit, so that the left and right L-shaped pressing heads 11 are opened and merged, thereby placing and pressing the parts.

[0033] Example 3

[0034] like Figure 1 , Figure 2 , Figure 3 As shown, the present invention is an integrated device for assembly and laser welding: the lateral movement unit includes a lateral guide rail 13, a lateral slider 14, and two front and rear tension spring units, each of which includes a lateral tension spring 15, a small connecting block I 16, and a small connecting block II 17; the vertical movement unit includes a vertical slider 18, a vertical guide rail 19, and two front and rear tension spring units, each of which includes a vertical tension spring 20, a small connecting block III 21, and a small connecting block IV 22; the lateral guide rail 13 is fixed below the cover plate positioning block 10, the lateral slider 14 is fixed above the horizontal side of the L-shaped mounting seat 12, and the lateral slider 14 cooperates with the lateral guide rail 13; the small connecting block I 16 is fixed to the cover plate positioning block Below the block 10, the small connecting block II 17 is fixed to the upper part of the outer side surface of the vertical side of the L-shaped mounting seat 12, and the two ends of the transverse tension spring 15 are respectively connected to the open grooves on the small connecting block I 16 and the small connecting block II 17; the vertical slider 18 is fixed to the inner side surface of the vertical side of the L-shaped pressure head 11, and the vertical guide rail 19 is fixed to the outer side surface of the vertical side of the L-shaped mounting seat 12, and the vertical slider 18 cooperates with the vertical guide rail 19; the small connecting block III 21 is fixed to the below of the horizontal side of the L-shaped pressure head 11, the small connecting block IV 22 is fixed to the middle part of the outer side surface of the vertical side of the L-shaped mounting seat 12, and the two ends of the vertical tension spring 20 are respectively connected to the open grooves on the small connecting block III 21 and the small connecting block IV 24.

[0035] The present invention is an integrated device for assembly and laser welding: the left and right L-shaped mounting seats 12 are respectively moved left and right along the transverse guide rail 13 through the transverse slider 14, thereby driving the left and right L-shaped pressing heads 11 to move left and right, and the left and right L-shaped pressing heads 11 are respectively moved up and down along the longitudinal guide rail 19 through the longitudinal slider 18, thereby realizing the left and right and up and down movement of the left and right L-shaped pressing heads 11.

[0036] When there are no parts on the cover positioning block 10, the clamping mechanism follows the rotation of the turntable to the first unlocking mechanism position and stops. The unlocking mechanism contacts the clamping mechanism to make the two L-shaped pressing heads 11 move upward and outward. After the first part is placed on the cover positioning block, the unlocking mechanism leaves the clamping mechanism; under the action of the horizontal tension spring force, the two L-shaped mounting seats 12 are in a tightened state toward the center line of the clamping mechanism, that is, the left and right L-shaped pressing heads move inward; at the same time, under the action of the vertical tension spring force, the two L-shaped pressing heads are in a tightened state downward, that is, the L-shaped pressing heads move downward, so that the inside of the horizontal side of the L-shaped pressing heads presses the cover parts placed on the cover positioning block; and the clamping mechanism is always in a clamped state during the process of following the rotation of the turntable. When it stops at the next unlocking mechanism position, the unlocking mechanism contacts the clamping mechanism to make the two L-shaped pressure heads move upward and outward. After the second part is placed on the cover positioning block, the unlocking mechanism leaves the clamping mechanism and the clamping mechanism clamps the part. This cycle continues until all parts required for cover assembly are placed on the cover positioning block and subsequent welding work is carried out.

[0037] Example 4

[0038] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the present invention is an integrated device for assembly and laser welding: the roller assembly includes a horizontal roller mounting seat 27, a horizontal roller 28, and a vertical roller 29. The horizontal roller mounting seat 27 is fixedly connected to the lower part of the inner side of the vertical side of the L-shaped mounting plate 12, and the horizontal roller 28 is connected to the horizontal mounting seat 27; the vertical roller 29 is connected to the lower part of the vertical side of the L-shaped pressure head 11; the unlocking mechanism includes a connecting plate 40, a cylinder 41, two guide rails 42, an unlocking push plate 43, and two small push plates 44; the connecting plate 41 is fixed to the machine On the frame, the cylinder 41 and the left and right guide rails 42 are all fixed on the connecting plate 41, and the two guide rails 42 are located on the left and right sides of the cylinder 41; the middle part of the unlocking push plate 43 is connected to the rod part of the cylinder 41, and its left and right ends are connected to the guide rails 42 through the lower slider, and two small push plates 44 are symmetrically fixed on the unlocking push plate 43; the surface of the unlocking push plate 43 opposite to the clamping mechanism is an inclined vertical roller contact surface 45, and the surfaces of the two small push plates 44 opposite to the clamping mechanism are inclined horizontal roller contact surfaces 46.

[0039] When the clamping mechanism comes to the working position of the unlocking mechanism, as the cylinder 41 works, the unlocking push plate 43 is pushed inward, and the vertical roller contact surface 45 first contacts the vertical roller 29 through its lower part and then further pushes the vertical roller to move upward, so that the L-shaped pressure head 11 moves upward; when the vertical roller 29 contacts the upper surface 47 of the unlocking push plate 43, the L-shaped pressure head 11 stops moving upward, and as the unlocking push plate 43 continues to move inward, the transverse roller contact surface 46 first contacts the transverse roller 28 through its inner surface and then further pushes the transverse roller to move outward, thereby realizing the opening between the two L-shaped pressure heads, and then realizing the loosening of the parts, and placing the new parts on the fixed plate positioning block 10. When the new parts are placed, the cylinder 41 works to push the unlocking push plate 43 to move outwards away from the clamping mechanism. At this time, under the action of the tension of the horizontal tension spring 15, the two L-shaped mounting seats 12 are tightened toward the center line of the clamping mechanism, which drives the left and right L-shaped pressing heads to move inwards to merge; at the same time, under the action of the vertical tension spring force 20, the two L-shaped pressing heads are tightened downwards, that is, the L-shaped pressing heads move downwards, so that the inside of the horizontal side of the L-shaped pressing head presses the cover plate parts placed on the cover plate positioning block 10. Such a cycle can reliably press the cover plate parts placed in sequence according to the assembly order.

[0040] In the integrated device for assembly and laser welding of the present invention: the cylinder 41 is horizontally arranged, and when working, it pushes the unlocking push plate to move inward and outward (i.e., contact the clamping mechanism or leave the clamping mechanism), so there is no requirement for the overall height of the frame, the space occupied can be small and the overall stability is good. At the same time, the vertical roller contact surface of the unlocking push plate 43 makes the L-shaped pressure head move upward, and the horizontal roller contact surface of the small push plate 44 makes the L-shaped pressure head move outward, while the cover plate positioning block 10 for placing parts remains stable and motionless, and only the relevant parts need to be placed on it, which ensures the position between the parts, thereby ensuring the quality of subsequent welding.

[0041] Example 5

[0042] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, in the integrated device for assembly and laser welding of the present invention: the roller assembly also includes a universal wheel mounting seat 30 and a universal wheel 31, the universal wheel mounting seat 30 is fixedly connected to the lower part of the outer side surface of the vertical side of the L-shaped pressure head 11, and the universal wheel 31 is connected to the universal wheel mounting seat 30; the lowest part of the rotating surface of the universal wheel 31 is lower than the lower busbar of the rotating surface of the vertical roller 29.

[0043] When the L-shaped pressure head 11 stops moving upward and starts moving outward, the universal wheel 31 contacts the upper surface 47 of the unlocking push plate 44, so that the vertical roller 28 does not contact the upper surface of the unlocking push plate, avoiding damage caused by friction along the non-rotating direction of the vertical roller.

[0044] Example 6

[0045] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the integrated device for assembly and laser welding of the present invention: the clamping mechanism also includes a pressure head copper nozzle 32, the pressure head copper nozzle 32 is fixed at the lower part of the inner hole of the L-shaped pressure head 11, and the pressure head copper nozzle 32 is a contoured pressure head.

[0046] The copper nozzle 32 of the pressure head is arranged in the L-shaped pressure head 11, and each part is limited and reliably pressed by the copper nozzle 32 of the pressure head; at the same time, when the welding ring needs to be laser welded after the parts are assembled, there is no need for a special pressure head to press the position to be welded, thereby simplifying the process flow and equipment structure.

[0047] In this way, at the welding station where the final assembly is completed, the welding ram driven by the electric cylinder pushes the cover plate from bottom to top, and the cover plate moves upward and leaves the surface of the cover plate positioning block; the cover plate moves upward with the L-shaped ram and the ram copper nozzle and finally sticks to the ram dead stop; the electric cylinder continues to move and compresses the sealing ring to the compression amount required by the customer and then stops. At this time, laser welding is carried out. After the welding is completed, the welding ram drops, and the L-shaped ram and the ram copper nozzle reset the cover plate to the surface of the cover plate positioning block under the action of the vertical tension spring.

[0048] Example 7

[0049] like Figure 1 , Figure 2 , Figure 3 As shown, the present invention is an integrated device for assembly and laser welding: the moving component also includes a limiting unit, the limiting unit includes a large connecting seat 23, two small connecting seats 24, two rivets 25, and two positioning bolts 26. The large connecting seat 23 is fixed under the cover plate positioning block 10 and is located in the middle of the left and right transverse guide rails 13. A rivet 25 is connected to each of the left and right end surfaces of the large connecting seat 23. The two small connecting seats 24 are respectively fixed under the horizontal sides of the two L-shaped mounting seats 12. The positioning bolts 26 pass through the small connecting seat 24, and the end faces thereof are opposite to the rivets 25.

[0050] By adjusting the position of the positioning bolt 26, the distance between its end face and the rivet 25 is changed, thereby adjusting the position where the L-shaped mounting seat 12, that is, the L-shaped pressing head 11 stops when moving inwards and merging.

[0051] Example 8

[0052] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the integrated device for assembly and laser welding of the present invention also includes a detection unit, which includes left and right blocks 33, left and right mounting seats 48, and left and right sensors 49; the two blocks 32 are respectively fixed on the horizontal sides of the two L-shaped mounting seats 12 and are symmetrically arranged on the left and right, the mounting bar 48 is fixed on the connecting plate 40, and the sensor 49 is fixed on the upper part of the mounting bar 48 and is arranged opposite to the block 32 in front and back.

[0053] When the sensor 49 detects that the stopper 32 moves left and right with the L-shaped mounting seat 12, it indicates that the L-shaped pressing head 11 can be opened and merged to realize the corresponding function; otherwise, maintenance is required.

[0054] Example 9

[0055] The control method of the integrated device for assembly and laser welding of the present invention comprises the following steps: step 1, the turntable 1 drives the clamping mechanism to rotate to the unlocking mechanism position; step 2, the cylinder 41 works to push the unlocking push plate 43 to move inward, the vertical roller contact surface 45 contacts the vertical roller 29, and pushes the left and right L-shaped pressure heads 11 to move upward; when the L-shaped pressure head 11 stops moving upward, the transverse roller contact surface 46 contacts the transverse roller 28, and pushes the left and right L-shaped pressure heads to move outward at the same time, and the parts are placed on the cover plate positioning block 10; step 3, after the parts are placed, the cylinder 41 works to push the unlocking push plate 43 to move outward, and the transverse tension spring 15 drives the left and right L-shaped pressure heads 11 to move inward to achieve merging; the vertical tension spring 20 drives the left and right L-shaped pressure heads 11 to move downward, so that the inside of the transverse side 11 of the L-shaped pressure head presses the parts on the cover plate positioning block 10; step 4; the turntable 1 drives the clamping mechanism to rotate to the next unlocking mechanism position, repeats the above action, and places the next part.

[0056] Figure 5 This is a schematic diagram of the compression after the cover plate body 51 is installed; Figure 6 It is a schematic diagram of compression after the pole 52 and the sealing ring 53 are installed; Figure 7 It is a schematic diagram of compression after the mica sheet 54 is installed; Figure 8 This is a schematic diagram of the welding ring when 55 is not pressed tightly after installation; Fig. 9 This is a schematic diagram of 55 being pressed after the welding ring is installed; Fig.10 This is a schematic diagram of laser welding.

[0057] Among them, the number of clamping mechanisms and unlocking mechanisms is the same as the number of cover plate parts, ensuring that all parts are assembled when arriving at the last welding station.

[0058] The principle of the integrated device for assembly and laser welding of the present invention is as follows: the clamping mechanism is installed on the turntable and rotates with the turntable, and parts are installed at each working position, i.e., the fixed position of the unlocking mechanism. Before each installation, the two L-shaped pressing heads first move vertically upward and then move laterally outward to ensure that there is no interference when placing the parts. After each installation is completed, the two L-shaped pressing heads first move laterally inward and then move vertically downward to clamp the parts.

[0059] The advantages of the integrated device for assembly and laser welding of the present invention are: 1. The left and right L-shaped pressing heads can move up, down, left and right, so as to realize the assembly of different parts, and as the height after assembly increases, the L-shaped pressing head can always reliably press and limit the parts; 2. The cylinder is horizontally arranged, and its horizontal push unlocking push plate moves inward and outward, and there is no requirement for the overall height of the frame, the space occupied can be smaller and the overall stability is better; at the same time, when the workpiece is placed, the L-shaped pressing head is realized by moving upward and outward, while the cover plate positioning block for placing the parts is kept stable and motionless, which ensures the position between the parts and thus ensures the quality of subsequent welding; 3. The stop position of the L-shaped pressing head when moving inward and merging can be adjusted to ensure reliability; 4. The detection unit detects the reliability of the opening and merging of the L-shaped pressing head to prevent damage to the equipment; 5. The L-shaped pressing head integrates a copper nozzle as a welding pressing head, which presses the position to be welded for laser welding after assembly is completed, simplifying the process flow and equipment structure.

Claims

1. An integrated device for assembling and laser welding a lithium battery cover, characterized in that: It comprises a plurality of clamping mechanisms and a plurality of unlocking mechanisms. The clamping mechanisms are fixedly connected to a turntable (1) and rotate with the turntable (1), and the unlocking mechanisms are fixedly connected to a frame (2) and do not rotate. When the turntable (1) is stationary, the positions of the clamping mechanisms and the unlocking mechanisms correspond one to one. When the clamping mechanism reaches the working position of the unlocking mechanism, the unlocking mechanism moves inward to release the clamping mechanism and place the parts. After the parts are placed, the unlocking mechanism moves outward and the clamping mechanism clamps the parts. When all the parts are finally assembled through the previous multiple working positions in sequence, laser welding is performed.

2. The integrated assembly and laser welding device according to claim 1 is characterized in that: The clamping mechanism comprises a cover plate positioning block (10), two left and right L-shaped pressing heads (11), two left and right symmetrically arranged moving assemblies, and two left and right symmetrically arranged roller assemblies. Each moving assembly comprises an L-shaped mounting seat (12), a lateral moving unit, and a vertical moving unit. The interior of the cover plate positioning block (10) is fixedly connected to the turntable, and the exterior is for placing the cover plate portion. The L-shaped mounting seat (12) is located at the bottom of the cover plate positioning block (10) and is connected to the cover plate positioning block (10) via the lateral moving unit. The L-shaped pressing head (11) is located at the left and right sides of the cover plate positioning block (10), its lateral side is located at the top of the cover plate positioning block (10) where the cover plate portion is placed, and its vertical side is connected to the L-shaped mounting seat (12) via the vertical moving unit. The roller assembly is connected to the L-shaped pressing head (11) and the L-shaped mounting seat (12).

3. The integrated assembly and laser welding device according to claim 2 is characterized in that: The transverse moving unit comprises a transverse guide rail (13), a transverse slider (14), and two front and rear tension spring units, each of which comprises a transverse tension spring (15), a small connecting block I (16), and a small connecting block II (17); the vertical moving unit comprises a vertical slider (18), a vertical guide rail (19), and two front and rear tension spring units, each of which comprises a vertical tension spring (20), a small connecting block III (21), and a small connecting block IV (22); the transverse guide rail (13) is fixed below the cover plate positioning block (10), the transverse slider (14) is fixed above the horizontal side of the L-shaped mounting seat (12), and the transverse slider (14) cooperates with the transverse guide rail (13); the small connecting block I (16) is fixed below the cover plate positioning block (10), and the small connecting block The block II (17) is fixed to the upper part of the outer side surface of the vertical side of the L-shaped mounting seat (12), and the two ends of the transverse tension spring (15) are respectively connected to the open grooves on the small connection block I (16) and the small connection block II (17); the vertical slider (18) is fixed to the inner side surface of the vertical side of the L-shaped pressure head (11), and the vertical guide rail (19) is fixed to the outer side surface of the vertical side of the L-shaped mounting seat (12), and the vertical slider (18) cooperates with the vertical guide rail (19); the small connection block III (21) is fixed to the lower side of the transverse side of the L-shaped pressure head (11), the small connection block IV (22) is fixed to the middle part of the outer side surface of the vertical side of the L-shaped mounting seat (12), and the two ends of the vertical tension spring (20) are respectively connected to the open grooves on the small connection block III (21) and the small connection block IV (24).

4. The integrated assembly and laser welding device according to claim 2, characterized in that: The roller assembly comprises a transverse roller mounting seat (27), a transverse roller (28), and a vertical roller (29); the transverse roller mounting seat (27) is fixedly connected to the lower part of the inner side of the vertical side of the L-shaped mounting plate (12); the transverse roller (28) is connected to the transverse mounting seat (27); the vertical roller (29) is connected to the lower part of the vertical side of the L-shaped pressure head (11); the unlocking mechanism comprises a connecting plate (40), a cylinder (41), two guide rails (42), an unlocking push plate (43), and two small push plates (44); the connecting plate (40) is fixed to the frame, the cylinder (41) The left and right guide rails (42) are fixed on the top of the connecting plate (40), and the two guide rails (42) are located on the left and right sides of the cylinder (41); the middle part of the unlocking push plate (43) is connected to the rod part of the cylinder (41), and its left and right ends are connected to the guide rails (42) through the lower slider, and the two small push plates (44) are symmetrically fixed on the unlocking push plate (43); the surface of the unlocking push plate (43) facing the clamping mechanism is an inclined vertical roller contact surface (45), and the surfaces of the two small push plates (44) facing the clamping mechanism are inclined horizontal roller contact surfaces (46).

5. The integrated assembly and laser welding device according to claim 4 is characterized in that: The roller assembly further comprises a universal wheel mounting seat (30) and a universal wheel (31); the universal wheel mounting seat (30) is fixedly connected to the lower part of the outer side surface of the vertical side of the L-shaped pressure head (11); the universal wheel (31) is connected to the universal wheel mounting seat (30); and the lowermost part of the rotating surface of the universal wheel (31) is lower than the lower generatrix of the rotating surface of the vertical roller (29).

6. The integrated assembly and laser welding device according to claim 2, characterized in that: The pressing mechanism also includes a pressure head copper nozzle (32), which is fixed at the lower part of the inner hole of the L-shaped pressure head (11), and the pressure head copper nozzle (32) is a contoured pressure head.

7. The integrated assembly and laser welding device according to claim 3 is characterized in that: The moving assembly also includes a limiting unit, which includes a large connecting seat (23), two small connecting seats (24), two rivets (25), and two positioning bolts (26). The large connecting seat (23) is fixed below the cover plate positioning block (10) and is located in the middle of the left and right transverse guide rails (13). A rivet (25) is connected to each of the left and right end surfaces of the large connecting seat (23). The two small connecting seats (24) are respectively fixed below the horizontal sides of the two L-shaped mounting seats (12). The positioning bolt (26) passes through the small connecting seat (24) and its end surface is opposite to the rivet (25).

8. The integrated assembly and laser welding device according to claim 2, characterized in that: The device also includes a detection unit, which includes left and right blocks (33), left and right mounting seats (48), and left and right sensors (49); the two blocks (32) are respectively fixed on the horizontal sides of the two L-shaped mounting seats (12) and are symmetrically arranged on the left and right sides; the mounting bar (48) is fixed on the connecting plate (40); and the sensor (49) is fixed on the upper part of the mounting bar (48) and is arranged opposite to the block (32) in front and back.

9. The control method of the integrated assembly and laser welding device according to claims 1-8, characterized in that: It includes the following steps: Step 1: The turntable drives the clamping mechanism to rotate to the unlocking mechanism position; Step 2: The cylinder works to push the unlocking push plate inward, and the vertical roller contact surface contacts the vertical roller, pushing the left and right L-shaped pressure heads to move upward; when the L-shaped pressure head stops moving upward, the horizontal roller contact surface contacts the horizontal roller, pushing the left and right L-shaped pressure heads to move outward at the same time, and placing the parts on the cover positioning block; Step 3: After the parts are placed, the cylinder works to push the unlocking push plate outward, and the horizontal tension spring drives the left and right L-shaped pressure heads to move inward to merge; the vertical tension spring drives the left and right L-shaped pressure heads to move downward, so that the inside of the horizontal side of the L-shaped pressure head presses the parts on the cover positioning block; Step 4: The turntable drives the clamping mechanism to rotate to the next unlocking mechanism position, repeats the above actions, and places the next part.

10. The control method according to claim 9, characterized in that: The number of clamping mechanisms and unlocking mechanisms is the same as the number of cover plate parts, ensuring that all parts are assembled when arriving at the last welding station.

Images