Laser welding machine for the periphery of the blade battery cover plate and its usage method

Abstract

The present invention discloses a laser welding machine for the periphery of a blade battery cover plate and its usage method. Among them, the laser welding machine for the periphery of the blade battery cover plate includes a frame and a laser welding mechanism and a rotating mechanism arranged on the frame. The laser welding mechanism includes a laser welding head and a three-dimensional module for driving the movement of the laser welding head; the rotating mechanism includes a pre-fixing component, an upper and lower clamping component, and a front and rear clamping component. The rotation axis of the rotating mechanism is parallel to the left-right direction. The pre-fixing component includes first and second pre-fixing structures arranged along the left-right direction with adjustable spacing to pre-fix the battery case and the cover plate of the blade battery. The spacing between the upper clamping structure and the lower clamping structure of the upper and lower clamping component is adjustable to clamp the battery case in the up-down direction. The spacing between the front clamping structure and the rear clamping structure of the front and rear clamping component is adjustable to clamp the battery case in the front-rear direction. This laser welding machine for the periphery of the blade battery cover plate can improve the production efficiency of the blade battery.

Description

Technical Field

[0001] The present invention relates to the technical field of blade batteries, and particularly relates to a laser welding machine for the periphery of a blade battery cover plate and a using method thereof. Background Art

[0002] In the related art, when welding the cover plate of the blade battery at the end of the battery box of the blade battery, manual welding is mainly used. Manual welding has a large labor intensity, slow speed, and low efficiency. Summary of the Invention

[0003] The main object of the present invention is to propose a laser welding machine for the periphery of a blade battery cover plate, aiming to improve the production efficiency of the blade battery.

[0004] To achieve the above object, the laser welding machine for the periphery of the blade battery cover plate proposed by the present invention includes:

[0005] A frame;

[0006] A laser welding mechanism provided on the frame, the laser welding mechanism includes a laser welding head and a three-dimensional module for driving the laser welding head to move; and

[0007] A rotating mechanism rotatably provided on the frame, the rotating mechanism includes a pre-fixing component, an upper and lower clamping component, and a front and rear clamping component. The rotation axis of the rotating mechanism is parallel to the left and right direction. The pre-fixing component includes a first pre-fixing structure and a second pre-fixing structure arranged along the left and right direction. The distance between the first pre-fixing structure and the second pre-fixing structure is adjustable to pre-fix the battery box of the blade battery and the cover plate of the blade battery arranged along the left and right direction. The upper and lower clamping component includes an upper clamping structure and a lower clamping structure arranged along the up and down direction. The distance between the upper clamping structure and the lower clamping structure is adjustable to clamp the battery box in the up and down direction. The front and rear clamping component includes a front clamping structure and a rear clamping structure arranged along the front and rear direction. The distance between the front clamping structure and the rear clamping structure is adjustable to clamp the battery box in the front and rear direction.

[0008] In one embodiment, during the process of clamping the battery box in the up and down direction, the upper clamping structure and the lower clamping structure move synchronously in the up and down direction and the moving distances are the same. During the process of clamping the battery box in the front and rear direction, the front clamping structure and the rear clamping structure move synchronously in the front and rear direction and the moving distances are the same.

[0009] In one embodiment, the upper and lower clamping assembly further includes an upper and lower synchronous belt extending in the up and down direction. The upper and lower synchronous belt includes a left side section and a right side section arranged at intervals in the left and right direction. The upper clamping structure is disposed on one of the left side section and the right side section, and the lower clamping structure is disposed on the other of the left side section and the right side section;

[0010] The front and rear clamping assembly further includes a front and rear synchronous belt extending in the front and rear direction. The front and rear synchronous belt includes an upper side section and a lower side section arranged at intervals in the up and down direction. The front clamping structure is disposed on one of the upper side section and the lower side section, and the rear clamping structure is disposed on the other of the upper side section and the lower side section.

[0011] In one embodiment, the frame includes a base and a first mounting bracket, a second mounting bracket, and a third mounting bracket disposed on the base. The laser welding mechanism is disposed on the first mounting bracket. The second mounting bracket and the third mounting bracket are arranged at intervals in the left and right direction, and the second mounting bracket is movably disposed on the base so that the second mounting bracket can move toward or away from the third mounting bracket;

[0012] The first pre-fixing structure is rotatably disposed on the second mounting bracket. One end of the first pre-fixing structure connected to the second mounting bracket is one end of the rotating mechanism, and the other end of the first pre-fixing structure is used to abut against the cover plate;

[0013] The third mounting bracket includes a first mounting plate and a second mounting plate arranged at intervals in the left and right direction. The first mounting plate is located between the second mounting bracket and the second mounting plate. The rotating mechanism further includes a rotating frame whose two ends are respectively rotatably connected to the first mounting plate and the second mounting plate. One end of the rotating frame connected to the second mounting plate is the other end of the rotating mechanism;

[0014] The second pre-fixing structure is disposed at one end of the rotating frame close to the second mounting plate. The rotating frame includes a turntable rotatably connected to the first mounting plate. The turntable has a through hole for the first pre-fixing structure to pass through. The upper and lower clamping assembly and the front and rear clamping assembly are disposed on the turntable.

[0015] In one embodiment, the first pre-fixing structure can also move back and forth in the up and down direction; and / or

[0016] The second pre-fixing structure is movably disposed on the rotating frame so that the second pre-fixing structure can move toward or away from the first pre-fixing structure.

[0017] In one embodiment, the through hole is also used for the battery box to pass through;

[0018] The rotation mechanism further includes a left - right moving assembly for carrying the battery box. The left - right moving assembly includes a left - right moving plate for carrying the battery box. The left - right moving plate is movably arranged on the rotating frame so that the left - right moving plate can move back and forth in the left - right direction. The second pre - fixing structure is arranged on the left - right moving plate.

[0019] In one embodiment, the laser welding machine for the periphery of the blade battery cover plate further includes an orientation mechanism;

[0020] The orientation mechanism can rotate the first pre - fixing structure and then reset it to the working position so that the first pre - fixing structure is in the working position before contacting the cover plate each time; and / or

[0021] The orientation mechanism can also loosen or lock the first pre - fixing structure. When the orientation mechanism loosens the first pre - fixing structure, the first pre - fixing structure can rotate relative to the second mounting frame. When the orientation mechanism locks the first pre - fixing structure, the first pre - fixing structure is fixed relative to the second mounting frame.

[0022] In one embodiment, the laser welding machine for the periphery of the blade battery cover plate further includes an anti - pressing deformation mechanism arranged on one side of the turntable away from the up - down clamping assembly and the front - rear clamping assembly. The anti - pressing deformation mechanism includes an upper suction cup, a lower suction cup, an upper air cylinder and a lower air cylinder. The upper air cylinder is connected to the upper suction cup, and the lower air cylinder is connected to the lower suction cup. Both the upper suction cup and the lower suction cup are used to tightly suck the surface of the battery box. After both the upper suction cup and the lower suction cup tightly suck the surface of the battery box, the upper air cylinder is used to pull the upper suction cup upward, and the lower air cylinder is used to pull the lower suction cup downward to prevent the battery box from deforming; and / or

[0023] The laser welding machine for the periphery of the blade battery cover plate further includes a cooling mechanism arranged on one side of the turntable away from the up - down clamping assembly and the front - rear clamping assembly. The cooling mechanism can be attached to one end of the cover plate welded to the battery box.

[0024] In one embodiment, the laser welding machine for the periphery of the blade battery cover plate has a spot - welding position and a full - welding position. The laser welding machine for the periphery of the blade battery cover plate further includes a full - welding fixing mechanism. The second pre - fixing structure, the up - down clamping assembly and the front - rear clamping assembly can move in the front - rear direction;

[0025] At the spot - welding position, the second pre - fixing structure cooperates with the first pre - fixing structure to pre - fix the battery box and the box cover. At the full - welding position, the second pre - fixing structure, the up - down clamping assembly and the front - rear clamping assembly move in the front - rear direction so that the second pre - fixing structure cooperates with the full - welding fixing mechanism to clamp the battery box and the box cover.

[0026] The present invention also provides a welding method for the laser welding machine for the periphery of the blade battery cover plate described above, which is characterized by including the following steps:

[0027] Control the first pre-fixing structure and the second pre-fixing structure of the pre-fixing assembly to pre-fix the battery box and the cover plate arranged in the left-right direction;

[0028] Control the upper clamping structure and the lower clamping structure of the up-down clamping assembly to clamp the battery box in the up-down direction, and control the front clamping structure and the rear clamping structure of the front-rear clamping assembly to clamp the battery box in the front-rear direction;

[0029] Control the welding head to weld the periphery of one side of the cover plate;

[0030] Control the pre-fixing assembly, the battery box, the cover plate, the up-down clamping assembly and the front-rear clamping assembly to rotate 180°; and

[0031] Control the welding head to weld the periphery of the other side of the cover plate.

[0032] When the above-mentioned laser welding machine for the periphery of the blade battery cover plate works, the battery box of the blade battery and the cover plate of the blade battery can be pre-fixed together through the pre-fixing assembly first, and then the battery box and the cover plate can be clamped in the up-down direction and the front-rear direction through the up-down clamping assembly and the front-rear clamping assembly, so that the pre-fixed battery box and cover plate are fixed on the rotating mechanism; then welding can be carried out through the laser welding head to weld the cover plate to the battery box. Moreover, during the welding process, the battery box and the cover plate can be driven to rotate through the rotation of the rotating mechanism, so as to realize multi-directional welding. Compared with the manual welding method, using the above-mentioned laser welding machine for the periphery of the blade battery cover plate to weld and fix the battery box and the cover plate can improve the production efficiency of the blade battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0034] Figure 1 It is a three-dimensional structural schematic diagram of the laser welding machine for the periphery of the blade battery cover plate according to an embodiment of the present invention;

[0035] Figure 2 For Figure 1 It is a three-dimensional structural schematic diagram of another perspective of the laser welding machine for the periphery of the blade battery cover plate shown;

[0036] Figure 3 The Figure 1 three - dimensional structural schematic diagram of the laser welding machine for the periphery of the blade battery cover plate after removing the upper cover;

[0037] Figure 4 The Figure 3 side view of;

[0038] Figure 5 The Figure 3 three - dimensional structural schematic diagram of the laser welding mechanism and the first mounting bracket shown in;

[0039] Figure 6 The Figure 3 partial structural schematic diagram of the left end of the laser welding machine for the periphery of the blade battery cover plate shown in;

[0040] Figure 7 The Figure 3 partial structural schematic diagram of the right end of the laser welding machine for the periphery of the blade battery cover plate shown in;

[0041] Figure 8 The Figure 7 partial enlarged view of;

[0042] Figure 9 The Figure 7 side view of;

[0043] Figure 10 The Figure 7 structural schematic diagram from another perspective of;

[0044] Figure 11 The Figure 10 partial enlarged view of;

[0045] Figure 12 The Figure 3 structural schematic diagram of the full - weld fixing mechanism of the laser welding machine for the periphery of the blade battery cover plate shown in.

[0046] Explanation of the reference numerals in the drawings:

[0047]

[0048] The realization, functional characteristics and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0049] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0050] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0051] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0052] The present invention provides a laser welding machine for the periphery of a blade battery cover plate.

[0053] In the embodiments of the present invention, as Figures 1 - 11 shown, the laser welding machine 10 for the periphery of the blade battery cover plate includes a frame 200, a laser welding mechanism 300, and a rotating mechanism 400.

[0054] The laser welding mechanism 300 is arranged on the frame 200. The laser welding mechanism 300 includes a laser welding head 310 and a three-dimensional module 320 for driving the laser welding head 310 to move. Driven by the three-dimensional module 320, the laser welding head 310 can reciprocally move in the up-down direction, left-right direction, and front-back direction.

[0055] The rotating mechanism 400 is rotatably arranged on the frame 200. The rotation axis of the rotating mechanism 400 is parallel to the left - right direction. The rotating mechanism 400 includes a pre - fixing assembly 410, an up - down clamping assembly 420, and a front - rear clamping assembly 430. The pre - fixing assembly 410 includes a first pre - fixing structure 412 and a second pre - fixing structure 414 arranged along the left - right direction. The distance between the first pre - fixing structure 412 and the second pre - fixing structure 414 is adjustable to pre - fix the battery box of the blade battery arranged along the left - right direction and the cover plate of the blade battery. The up - down clamping assembly 420 includes an upper clamping structure 422 and a lower clamping structure 424 arranged along the up - down direction. The distance between the upper clamping structure 422 and the lower clamping structure 424 is adjustable to clamp the battery box in the up - down direction. The front - rear clamping assembly 430 includes a front clamping structure 432 and a rear clamping structure 434 arranged along the front - rear direction. The distance between the front clamping structure 432 and the rear clamping structure 434 is adjustable to clamp the battery box in the front - rear direction.

[0056] When the above - mentioned laser welding machine 10 for the periphery of the blade battery cover plate works, the battery box of the blade battery and the cover plate of the blade battery can be pre - fixed together by the pre - fixing assembly 410 first, and then the battery box and the cover plate can be clamped in the up - down direction and the front - rear direction by the up - down clamping assembly 420 and the front - rear clamping assembly 430, so that the pre - fixed battery box and cover plate are fixed on the rotating mechanism 400; then welding can be carried out through the laser welding head 310 to weld the cover plate to the battery box. Moreover, during the welding process, the battery box and the cover plate can be driven to rotate by the rotation of the rotating mechanism 400, so as to realize multi - directional welding. Compared with the manual welding method, using the above - mentioned laser welding machine 10 for the periphery of the blade battery cover plate to weld and fix the battery box and the cover plate can improve the production efficiency of the blade battery.

[0057] In this embodiment, during the process of clamping the battery box in the up - down direction, the upper clamping structure 422 and the lower clamping structure 424 move synchronously in the up - down direction and the moving distances are the same. During the process of clamping the battery box in the front - rear direction, the front clamping structure 432 and the rear clamping structure 434 move synchronously in the front - rear direction and the moving distances are the same. In this way, when the specification of the battery box changes, that is, when the size of the battery box changes, it can be ensured that different - specification (different - size) battery boxes have the same center line (the center line in the left - right direction, parallel to the rotation axis of the rotating mechanism 400), and there is no need for an additional step of adjusting the center line of the battery box, which is very convenient for rotary welding. That is, the convenience of using the above - mentioned laser welding machine 10 for the periphery of the blade battery cover plate is not limited by the specifications (sizes) of the battery box and the cover plate, and it can be applied to the welding of battery boxes and cover plates of various specifications (sizes).

[0058] In this embodiment, the up-and-down clamping assembly 420 further includes an up-and-down synchronous belt 426 extending in the up-and-down direction. The up-and-down synchronous belt 426 includes a left side section 426a and a right side section 426b arranged at intervals in the left-and-right direction. The upper clamping structure 422 is disposed on one of the left side section 426a and the right side section 426b, and the lower clamping structure 424 is disposed on the other of the left side section 426a and the right side section 426b. In this way, it is very convenient to realize that during the process of clamping the battery box in the up-and-down direction, the upper clamping structure 422 and the lower clamping structure 424 move synchronously in the up-and-down direction and the moving distances are the same.

[0059] The front-and-back clamping assembly 430 further includes a front-and-back synchronous belt 436 extending in the front-and-back direction. The front-and-back synchronous belt 436 includes an upper side section 436a and a lower side section 436b arranged at intervals in the up-and-down direction. The front clamping structure 432 is disposed on one of the upper side section 436a and the lower side section 436b, and the rear clamping structure 434 is disposed on the other of the upper side section 436a and the lower side section 436b. In this way, it is very convenient to realize that during the process of clamping the battery box in the front-and-back direction, the front clamping structure 432 and the rear clamping structure 434 move synchronously in the front-and-back direction and the moving distances are the same.

[0060] Specifically, in this embodiment, the up-and-down clamping assembly 420 further includes an up-and-down clamping drive motor 428. The up-and-down clamping drive motor 428 drives the up-and-down synchronous belt 426 through a synchronous pulley, wherein the up-and-down clamping drive motor 428 is equipped with a speed reducer. The front-and-back clamping assembly 430 further includes a front-and-back clamping drive motor 438. The front-and-back clamping drive motor 438 drives the front-and-back synchronous belt 436 through a synchronous pulley, wherein the front-and-back clamping drive motor 438 is also equipped with a speed reducer.

[0061] In this embodiment, the frame 200 includes a base 210 and a first mounting bracket 220, a second mounting bracket 230, and a third mounting bracket 240 disposed on the base 210. In this embodiment, the frame 200 further includes an upper cover 250. The upper cover 250 is disposed on the base 210 and forms a receiving space. The first mounting bracket 220, the second mounting bracket 230, the third mounting bracket 240, the laser welding mechanism 300, and the rotating mechanism 400 are all located in the receiving space.

[0062] The laser welding mechanism 300 is disposed on the first mounting bracket 220. The second mounting bracket 230 and the third mounting bracket 240 are arranged at intervals in the left-and-right direction. And the second mounting bracket 230 is movably disposed on the base 210 so that the second mounting bracket 230 can move toward or away from the third mounting bracket 240.

[0063] The first pre-fixing structure 412 is rotatably arranged on the second mounting bracket 230. One end of the first pre-fixing structure 412 connected to the second mounting bracket 230 is one end 400a of the rotating mechanism 400. The other end of the first pre-fixing structure 412 is used to abut against the cover plate. In this embodiment, the first pre-fixing structure 412 is rotatably connected to the second mounting bracket 230 through a tapered roller bearing, and the tapered roller bearing can ensure that the battery box and the cover plate rotate synchronously, which is more conducive to the smooth completion of rotary welding.

[0064] The third mounting bracket 240 includes a first mounting plate 240a and a second mounting plate 240b arranged at intervals in the left-right direction. The first mounting plate 240a is located between the second mounting bracket 230 and the second mounting plate 240b. The rotating mechanism 400 further includes a rotating frame 440 whose two ends are respectively rotatably connected to the first mounting plate 240a and the second mounting plate 240b. One end of the rotating frame 440 connected to the second mounting plate 240b is the other end 400b of the rotating mechanism 400. In this embodiment, a rotating drive motor is provided on the third mounting bracket 240, and the rotating drive motor can drive the rotating frame 440 to rotate. The rotating drive motor is a servo motor, and a synchronous belt and synchronous pulley are used as the power transmission mechanism to ensure that the rotation position accuracy is guaranteed. The synchronous pulley has a large transmission ratio, increases the torque, and improves the load capacity.

[0065] The second pre-fixing structure 414 is arranged at one end of the rotating frame 440 close to the second mounting plate 240b. The rotating frame 440 includes a turntable 440a rotatably connected to the first mounting plate 240a. The turntable 440a has a through hole 442 for the first pre-fixing structure 412 to pass through. The up-down clamping assembly 420 and the front-back clamping assembly 430 are arranged on the turntable 440a.

[0066] When the above-mentioned laser welding machine 10 for the periphery of the blade battery cover plate works, the battery box can be first placed on the rotating frame 440, and then the second mounting bracket 230 is controlled to move towards the third mounting bracket 240, so that the first pre-fixing structure 412 rotatably arranged on the second mounting bracket 230 moves towards the second pre-fixing structure 414, and the first pre-fixing structure 412 passes through the through hole 442, so that the first pre-fixing structure 412 and the second pre-fixing structure 414 can pre-fix the battery box and the cover plate arranged in the left-right direction together. Then, the up-down clamping assembly 420 and the front-back clamping assembly 430 are controlled to clamp the battery box and the cover plate in the up-down direction and the front-back direction, so that the pre-fixed battery box and cover plate are fixed on the rotating frame 440; by controlling the rotation of the rotating frame 440, the two ends of the rotating mechanism 400 can be controlled to rotate.

[0067] In this embodiment, the base 210 has a first slide rail 210a extending in the left - right direction. The second mounting bracket 230 is slidably engaged with the first slide rail 210a. The second mounting bracket 230 can move back and forth in the left - right direction under the combined action of a first synchronous belt 210b, a first synchronous pulley 210c, and a first motor provided on the base 210, so that the first pre - fixing structure 412 rotatably provided on the second mounting bracket 230 can move back and forth in the left - right direction.

[0068] In this embodiment, the first pre - fixing structure 412 can also move back and forth in the up - down direction. Thus, the first pre - fixing structure 412 has the function of finding and pre - fixing positions and can be applied to the pre - fixing of battery boxes and covers of various specifications (sizes). It can be understood that in other embodiments, the second pre - fixing 414 can also be set to move back and forth in the up - down direction, or both the first pre - fixing structure 412 and the second pre - fixing 414 can be set to move back and forth in the up - down direction. Specifically, in this embodiment, the first pre - fixing structure 412 can reciprocate in the up - down direction under the combined action of a second synchronous belt 412a, a second synchronous pulley 412b, and a second motor 412c provided on the base 210. Specifically, in this embodiment, the first pre - fixing structure 412 has a detachable contact head 412a, and the contact head 412a is adapted to the cover of the blade battery. When the specification (size) of the cover changes, the corresponding specification (size) of the contact head 412a can be replaced.

[0069] In this embodiment, the second pre - fixing structure 414 is movably provided on the rotating frame 440 so that the second pre - fixing structure 414 can move towards or away from the first pre - fixing structure 412. That is to say, in this embodiment, the first pre - fixing structure 412 can move towards or away from the first pre - fixing structure 412, and the second pre - fixing structure 414 can move towards or away from the first pre - fixing structure 412. Specifically, in this embodiment, the second pre - fixing structure 414 is driven by a lead screw motor provided on the rotating frame 440. Among them, the rotating frame 440 has a motor mounting seat 440b, and the lead screw motor is provided on the motor mounting seat 440b. The lead screw motor has a compact structure, integrating both the driving and transmission parts into one, and occupying less space in the structural layout. Specifically, in this embodiment, the lead screw of the lead screw motor uses a ball screw with higher precision, so that the surface of the battery box will not be deformed during the process of pressing the battery box.

[0070] In this embodiment, the through - hole 442 is also used for the battery box to pass through. That is to say, in this embodiment, the size of the through - hole 442 is larger.

[0071] The rotating mechanism 400 further includes a left - right moving assembly 450. The left - right moving assembly 450 includes a left - right moving plate 452 for carrying the battery box. The left - right moving plate 452 is movably arranged on the rotating frame 440 so that the left - right moving plate 452 can move back and forth in the left - right direction. The second pre - fixing structure 414 is movably arranged on the left - right moving plate 452. The lead screw motor is fixed on the left - right moving plate 452.

[0072] When the above - mentioned blade battery cover peripheral laser welding machine 10 is working, after the first pre - fixing structure 412 and the second pre - fixing structure 414 pre - fix the battery box and the cover arranged along the left - right direction together (at this time, the pre - fixed battery box and cover are located between the first mounting plate 240a and the second mounting plate 240b), the left - right moving plate 452 can be controlled to move towards the first mounting plate 240a in the left - right direction, that is, the second pre - fixing structure 414 is controlled to move towards the first mounting plate 240a in the left - right direction, and at the same time, the first pre - fixing structure 412 is controlled to move away from the first mounting plate 240a in the left - right direction, so that the pre - fixed battery box and cover can be pushed out of the first mounting plate 240a through the through - hole 442. Pre - fixing the battery box and the cover between the first mounting plate 240a and the second mounting plate 240b is very convenient for stable pre - fixing. After stable pre - fixing, the pre - fixed battery box and cover can be pushed out of the first mounting plate 240a through the through - hole 442, which is very convenient for rotary welding.

[0073] In this embodiment, the left - right moving assembly 450 further includes a third motor 454 for driving the left - right moving plate 452. The third motor 454 is arranged on the rotating frame 440.

[0074] In this embodiment, the blade battery cover peripheral laser welding machine 10 further includes an orienting mechanism 500. The orienting mechanism 500 can make the first pre - fixing structure 412 rotate and then reset to the working position so that the first pre - fixing structure 412 is in the working position every time before contacting the cover. In this way, the accuracy of the reset position of the first pre - fixing structure 412 after rotation can be ensured, and the accumulation of repeated positioning errors can be avoided.

[0075] In this embodiment, the orienting mechanism 500 can also loosen or lock the first pre - fixing structure 412. When the orienting mechanism 500 loosens the first pre - fixing structure 412, the first pre - fixing structure 412 can rotate relative to the second mounting frame 230. When the orienting mechanism 500 locks the first pre - fixing structure 412, the first pre - fixing structure 412 is fixed relative to the second mounting frame 230. In this way, the unnecessary rotation of the first pre - fixing structure 412 during the movement in the left - right direction can be avoided.

[0076] In this embodiment, the orientation mechanism 500 includes an orientation cylinder 510, a guide block 520, and a pressing block 530. The orientation cylinder 510 and the guide block 520 are arranged on the second mounting bracket 230. The pressing block 530 is inserted through the guide block 520 and is in sliding fit with the guide block 520. One end of the pressing block 530 is connected to the orientation cylinder 510, and the other end is used to contact or be spaced from the side surface of the rotating shaft of the first pre-fixing structure 412. When the orientation mechanism 500 releases the first pre-fixing structure 412, the pressing block 530 is spaced from the side surface of the rotating shaft of the first pre-fixing structure 412. When the orientation mechanism 500 locks the first pre-fixing structure 412, the pressing block 530 contacts the side surface of the rotating shaft of the first pre-fixing structure 412. Among them, the pressing block 530 and the guide block 520 are in sliding friction, which is equivalent to a sliding bearing and has high precision. And by contacting the side surface of the rotating shaft of the first pre-fixing structure 412 with the pressing block 530, the direction of the first pre-fixing structure 412 is finely adjusted again to ensure the orientation accuracy of the first pre-fixing structure 412, so as to ensure that the first pre-fixing structure 412 can be reset to the working position after rotation.

[0077] The side surface of the rotating shaft of the first pre-fixing structure 412 has an annular groove, and a partition plate is arranged in the annular groove. When the orientation mechanism 500 locks the first pre-fixing structure 412, the pressing block 530 contacts the bottom of the annular groove, and at the same time, the side surface of the pressing block 530 contacts the partition plate, so as to realize locking the first pre-fixing structure 412 and at the same time reset the first pre-fixing structure 412 to the working position, that is, locking the first pre-fixing structure 412 at the working position of the first pre-fixing structure 412.

[0078] In this embodiment, the laser welding machine 10 for the periphery of the blade battery cover plate further includes a mechanism 600 for preventing pressing deformation. The mechanism 600 for preventing pressing deformation is arranged on one side of the turntable 440a away from the upper and lower clamping assemblies 420 and the front and rear clamping assemblies 430. The mechanism 600 for preventing pressing deformation includes an upper suction cup 610, a lower suction cup 620, an upper air cylinder 630, and a lower air cylinder 640. The upper air cylinder 630 is connected to the upper suction cup 610, and the lower air cylinder 640 is connected to the lower suction cup 620. Both the upper suction cup 610 and the lower suction cup 620 are used to tightly suck the surface of the battery box. After both the upper suction cup 610 and the lower suction cup 620 tightly suck the surface of the battery box, the upper air cylinder 630 is used to pull the upper suction cup 610 upward, and the lower air cylinder 640 is used to pull the lower suction cup 620 downward to prevent the battery box from deforming.

[0079] In this embodiment, the laser welding machine 10 for the periphery of the blade battery cover plate further includes a cooling mechanism 700. The cooling mechanism 700 is arranged on one side of the turntable 440a away from the upper and lower clamping assemblies 420 and the front and rear clamping assemblies 430. The cooling mechanism 700 can be attached to one end of the battery case welding cover plate. In this embodiment, the cooling mechanism 700 is linked with the upper suction cup 610 or the lower suction cup 620. The cooling mechanism 700 is a water cooling mechanism, and water is passed into the cooling mechanism 700 to achieve cooling.

[0080] In this embodiment, a gas-electric slip ring is provided at the other end 400b of the rotating mechanism 400 to prevent the wiring of the motor, the air cylinder air pipe, and the cooling water pipe from being broken during rotation.

[0081] In this embodiment, the laser welding machine 10 for the periphery of the blade battery cover plate has a spot welding position and a full welding position. As Figures 1 - 12 shown, the laser welding machine 10 for the periphery of the blade battery cover plate further includes a full welding fixing mechanism 800. The second pre-fixing structure 414, the upper and lower clamping assemblies 420, and the front and rear clamping assemblies 430 can move in the front and rear directions. Specifically, in this embodiment, the base 210 has a second slide rail 210d extending in the front and rear directions. The third mounting bracket 240 is slidably engaged with the second slide rail 210d. Driven by the driving mechanism, the third mounting bracket 240 can move in the front and rear directions, so that the second pre-fixing structure 414, the upper and lower clamping assemblies 420, and the front and rear clamping assemblies 430 provided on the third mounting bracket 240 can move in the front and rear directions, thereby enabling the laser welding machine 10 for the periphery of the blade battery cover plate to switch between the spot welding position and the full welding position.

[0082] Among them, at the spot welding position, the second pre-fixing structure 414 cooperates with the first pre-fixing structure 412 to pre-fix the battery case and the cover plate. At the full welding position, the second pre-fixing structure 414, the upper and lower clamping assemblies 420, and the front and rear clamping assemblies 430 move in the front and rear directions so that the second pre-fixing structure 414 cooperates with the full welding fixing mechanism 800 to clamp the battery case and the cover plate.

[0083] The present invention also provides a method for laser welding the periphery of a blade battery cover plate, including the following steps:

[0084] Step S910, controlling the first pre-fixing structure and the second pre-fixing structure of the pre-fixing assembly to pre-fix the battery case and the cover plate arranged in the left-right direction.

[0085] Step S920, controlling the upper clamping structure and the lower clamping structure of the upper and lower clamping assemblies to clamp the battery case in the up-down direction, and controlling the front clamping structure and the rear clamping structure of the front and rear clamping assemblies to clamp the battery case in the front-rear direction.

[0086] Step S930, controlling the welding head to weld the periphery of one side of the cover plate.

[0087] Step S940, controlling the pre-fixing assembly, the battery box, the cover plate, the upper and lower clamping assemblies and the front and rear clamping assemblies to rotate 180 degrees.

[0088] Step S950, controlling the welding head to weld the periphery of the other side of the cover plate.

[0089] In this embodiment, before step S910, a step of placing a battery box on the left and right movable plates is also included.

[0090] In this embodiment, step S910 includes the following steps:

[0091] Step S911, a contact head matching the specification (size) of the cover plate is arranged on the first pre-fixed structure, and the first pre-fixed structure is controlled to move in the up-down direction, so that the position of the first pre-fixed structure in the up-down direction can match the specification (size) of the battery box placed on the left and right movable plates. For example, when the specification (size) of the battery box increases, it is necessary to control the first pre-fixed structure to move upward by a corresponding distance (half of the increased size), and when the specification (size) of the battery box decreases, it is necessary to control the first pre-fixed structure to move downward by a corresponding distance. It can be understood that when the specification (size) of the battery box remains unchanged, this step can be omitted.

[0092] Step S912, control the first pre-fixed structure to move in the left-right direction to reduce the distance between the first pre-fixed structure and the rotating disk, and make the distance match the cover plate. For example, through the distance, when the cover plate is placed on the contact head, the cover plate is not easy to fall off.

[0093] Step S913, placing a cover plate on the contact head.

[0094] Step S914, control the first pre-fixed structure to continue to move in the left and right direction, so that the cover plate passes through the turntable and contacts the battery box, and at the same time, the second pre-fixed structure moves toward the first pre-fixed structure and contacts the battery box. In this way, the first pre-fixed structure cooperates with the second pre-fixed structure to pre-fix the cover plate and the battery box. Specifically, in this embodiment, when the cover plate contacts the battery box, the system sends a signal to the screw motor to start working.

[0095] Step S915, the left and right movable plates move toward the rotating disk, and drive the second pre-fixed structure to move toward the rotating disk, while the first pre-fixed structure moves away from the rotating disk, so that the pre-fixed battery box and the cover plate enter the welding position. In this embodiment, when in the welding position, the cover plate is located between the rotating disk and the first pre-fixed structure.

[0096] Step S916: First, control the upper suction cup and the lower suction cup to respectively suck tightly the upper and lower surfaces of the battery box, and then control the upper air cylinder cooperating with the upper suction cup to pull the upper suction cup upward, and control the lower air cylinder cooperating with the lower suction cup to pull the lower suction cup downward. In this way, the deformation of the battery box can be prevented.

[0097] In this embodiment, after completing step S920, it further includes the step of supplying water to the cooling mechanism located on one side of the turntable away from the upper and lower clamping assemblies and the front and rear clamping assemblies.

[0098] In this embodiment, after completing step S920, it further includes the step of controlling the orientation mechanism to release the first pre-fixing structure so that the first pre-fixing structure can rotate relative to the second mounting bracket.

[0099] In this embodiment, after completing step S950, it further includes the following steps:

[0100] Step S961: The upper air cylinder and the lower air cylinder reset to cut off the suction of the upper suction cup and the lower suction cup.

[0101] Step S962: The upper and lower clamping assemblies and the front and rear clamping assemblies open to release the battery box.

[0102] Step S963: The left and right moving plates move away from the turntable and drive the second pre-fixing structure to move away from the turntable. At the same time, the first pre-fixing structure moves towards the turntable so that the pre-fixed battery box and the cover plate return to the initial position.

[0103] Step S964: The first pre-fixing structure moves away from the turntable to separate from the cover plate welded to the battery box.

[0104] Step S965: Control the orientation mechanism to lock the first pre-fixing structure and make the first pre-fixing structure reset to the working position.

[0105] Step S966: The lead screw motor works to separate the second pre-fixing structure from the battery box.

[0106] The above are only the optional embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A laser welding machine for the periphery of a blade battery cover plate, characterized in that, it includes: A frame, including a base and a first mounting frame, a second mounting frame and a third mounting frame provided on the base; A laser welding mechanism, provided on the first mounting frame, the laser welding mechanism includes a laser welding head and a three-dimensional module for driving the movement of the laser welding head; and A rotating mechanism, rotatably provided on the frame, the rotating mechanism includes a pre-fixing component, an upper and lower clamping component and a front and rear clamping component, the rotation axis of the rotating mechanism is parallel to the left and right direction, the pre-fixing component includes a first pre-fixing structure and a second pre-fixing structure arranged along the left and right direction, the distance between the first pre-fixing structure and the second pre-fixing structure is adjustable to pre-fix the battery box of the blade battery and the cover plate of the blade battery arranged along the left and right direction, the upper and lower clamping component includes an upper clamping structure and a lower clamping structure arranged along the up and down direction, the distance between the upper clamping structure and the lower clamping structure is adjustable to clamp the battery box in the up and down direction, the front and rear clamping component includes a front clamping structure and a rear clamping structure arranged along the front and rear direction, the distance between the front clamping structure and the rear clamping structure is adjustable to clamp the battery box in the front and rear direction; the first pre-fixing structure is rotatably provided on the second mounting frame, one end of the first pre-fixing structure connected to the second mounting frame is one end of the rotating mechanism, and the other end of the first pre-fixing structure is used to abut against the cover plate; the third mounting frame includes a first mounting plate and a second mounting plate arranged at intervals along the left and right direction, the first mounting plate is located between the second mounting frame and the second mounting plate, the rotating mechanism further includes a rotating frame whose two ends are respectively rotatably connected to the first mounting plate and the second mounting plate, one end of the rotating frame connected to the second mounting plate is the other end of the rotating mechanism; the second pre-fixing structure is provided at one end of the rotating frame close to the second mounting plate, the rotating frame includes a turntable rotatably connected to the first mounting plate, the turntable has a through hole for the first pre-fixing structure to pass through, and the upper and lower clamping component and the front and rear clamping component are provided on the turntable; A cooling mechanism, provided on one side of the turntable away from the upper and lower clamping component and the front and rear clamping component, the cooling mechanism can be attached to one end of the battery box where the cover plate is welded; The laser welding machine for the periphery of the blade battery cover plate further includes an anti-compression deformation mechanism provided on one side of the turntable away from the upper and lower clamping component and the front and rear clamping component.

2. The laser welding machine for the periphery of the blade battery cover plate according to claim 1, characterized in that, During the process of clamping the battery box in the up and down direction, the upper clamping structure and the lower clamping structure move synchronously in the up and down direction and the moving distances are the same. During the process of clamping the battery box in the front and rear direction, the front clamping structure and the rear clamping structure move synchronously in the front and rear direction and the moving distances are the same.

3. The laser welding machine for the periphery of the blade battery cover plate according to claim 2, characterized in that, The upper and lower clamping assembly further includes an upper and lower synchronous belt extending in the up and down direction. The upper and lower synchronous belt includes a left side section and a right side section arranged at intervals in the left and right direction. The upper clamping structure is provided on one of the left side section and the right side section, and the lower clamping structure is provided on the other of the left side section and the right side section; The front and rear clamping assembly further includes a front and rear synchronous belt extending in the front and rear direction. The front and rear synchronous belt includes an upper side section and a lower side section arranged at intervals in the up and down direction. The front clamping structure is provided on one of the upper side section and the lower side section, and the rear clamping structure is provided on the other of the upper side section and the lower side section.

4. The laser welding machine for the periphery of the blade battery cover plate according to claim 1, characterized in that, The second mounting bracket and the third mounting bracket are arranged at intervals in the left and right direction, and the second mounting bracket is movably arranged on the base so that the second mounting bracket can move towards or away from the third mounting bracket.

5. The laser welding machine for the periphery of the blade battery cover plate according to claim 4, characterized in that, The first pre-fixing structure can also move back and forth in the up and down direction; and / or The second pre-fixing structure is movably arranged on the rotating frame so that the second pre-fixing structure can move towards or away from the first pre-fixing structure.

6. The laser welding machine for the periphery of the blade battery cover plate according to claim 4, characterized in that, The through hole is also used for the battery box to pass through; The rotating mechanism further includes a left and right moving assembly for carrying the battery box. The left and right moving assembly includes a left and right moving plate for carrying the battery box. The left and right moving plate is movably arranged on the rotating frame so that the left and right moving plate can move back and forth in the left and right direction, and the second pre-fixing structure is arranged on the left and right moving plate.

7. The laser welding machine for the periphery of the blade battery cover plate according to claim 4, characterized in that, The laser welding machine for the periphery of the sheet battery cover plate further includes an orientation mechanism; The orientation mechanism can make the first pre-fixing structure rotate and then reset to the working position so that the first pre-fixing structure is in the working position before contacting the cover plate each time; and / or The orientation mechanism can also loosen or lock the first pre-fixing structure. When the orientation mechanism loosens the first pre-fixing structure, the first pre-fixing structure can rotate relative to the second mounting bracket. When the orientation mechanism locks the first pre-fixing structure, the first pre-fixing structure is fixed relative to the second mounting bracket.

8. The laser welding machine for the periphery of the blade battery cover plate according to claim 4, characterized in that, The anti-compression deformation mechanism includes an upper suction cup, a lower suction cup, an upper air cylinder and a lower air cylinder. The upper air cylinder is connected to the upper suction cup, and the lower air cylinder is connected to the lower suction cup. Both the upper suction cup and the lower suction cup are used to tightly suck the surface of the battery box. After both the upper suction cup and the lower suction cup tightly suck the surface of the battery box, the upper air cylinder is used to pull the upper suction cup upward, and the lower air cylinder is used to pull the lower suction cup downward to prevent the battery box from deforming.

9. The laser welding machine for the periphery of the blade battery cover plate according to claim 1, It is characterized in that the laser welding machine for the periphery of the blade battery cover plate has spot welding positions and full welding positions, the laser welding machine for the periphery of the blade battery cover plate further includes a full welding fixing mechanism, and the second pre-fixing structure, the upper and lower clamping assemblies and the front and rear clamping assemblies can move in the front and rear directions; at the spot welding position, the second pre-fixing structure cooperates with the first pre-fixing structure to pre-fix the battery box and the cover plate, and at the full welding position, the second pre-fixing structure, the upper and lower clamping assemblies and the front and rear clamping assemblies move in the front and rear directions so that the second pre-fixing structure cooperates with the full welding fixing mechanism to clamp the battery box and the cover plate.

10. A method for using the laser welding machine for the periphery of the blade battery cover plate according to any one of claims 1-9, It is characterized in that it includes the following steps: controlling the first pre-fixing structure and the second pre-fixing structure of the pre-fixing assembly to pre-fix the battery box and the cover plate arranged in the left-right direction; controlling the upper clamping structure and the lower clamping structure of the upper and lower clamping assemblies to clamp the battery box in the up-down direction, and controlling the front clamping structure and the rear clamping structure of the front and rear clamping assemblies to clamp the battery box in the front-rear direction; controlling the welding head to weld the periphery of one side of the cover plate; controlling the pre-fixing assembly, the battery box, the cover plate, the upper and lower clamping assemblies and the front and rear clamping assemblies to rotate 180°; and controlling the welding head to weld the periphery of the other side of the cover plate.

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