A battery module disassembly system

Abstract

The application provides a battery module disassembling system, which comprises a module pole milling mechanism for milling the pole position of the battery module, a battery cell pole milling mechanism for milling the surface of the battery cell pole, and a battery cell film tearing mechanism for tearing the PET film of the battery cell. The module pole milling mechanism mills the module pole to remove the weld, so that the module pole is separated from the upper cover plate of the module, and the battery cell can be taken out of the battery module. Then, the surface of the battery cell pole is milled by the battery cell pole milling mechanism to remove the weld on the battery cell pole, and the welded battery cell pole is disassembled. Finally, the PET film on the battery cell is torn by the battery cell film tearing mechanism, and the battery cell is recycled for reuse, so that the disassembly and recycling of the battery module are completely completed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium battery recycling, and in particular to a battery module disassembling system. BACKGROUND

[0002] With the popularization of electric vehicles, lithium batteries have become important energy storage devices. In the production process of lithium batteries, the upper end of the cell pole and the module pole generally needs to be welded and fixed. However, laser welding has high requirements for the cleanliness of the surface of the pole and the integrated cover plate, the gap, etc. If the surface is slightly dirty, the pole weld will have a burst point and other defects. Further, the weld overflow cannot meet the design requirements. Lithium ion batteries are relatively high in cost, and direct scrap will result in waste of resources, and discarded lithium ion batteries will pollute the environment. At the same time, due to the serious attenuation of power batteries, many waste batteries cannot be processed, so the technology of disassembling and recycling battery modules is increasingly valued.

[0003] The invention patent application with publication number CN114393006A discloses a power battery module disassembling device, which determines the weld position through CCD to obtain an image and determines the milling position through a laser range finder. The disassembling device needs to determine the weld position and distance through an image each time it works, and then controls the milling cutter processing position through a controller, which has high requirements for computing power and slow running speed, affecting the processing speed. Moreover, it can only be used for disassembling the module, but the cells disassembled from the module still need to remove the welded cell poles and attached PET film to continue to use, and the prior art cannot solve these problems. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a system for completely disassembling the cells of a battery module.

[0005] The present application solves the above technical problems by the following technical scheme: a battery module disassembling system, comprising a module pole milling mechanism for milling the pole position of the battery module, a cell pole milling mechanism for milling the surface of the cell pole, and a cell film tearing mechanism for tearing the PET film on the cell.

[0006] The module pole milling mechanism mills the module pole to remove the weld, so that the module pole is separated from the module upper cover plate, so that the cell can be taken out of the battery module. Then the cell pole milling mechanism mills the surface of the cell pole to remove the weld on the cell pole, and the welded cell pole is removed. Finally, the cell film tearing mechanism tears off the PET film on the cell, recycles the cell for reuse, and thus completely disassembles and recycles the battery module.

[0007] Preferably, the module pole milling mechanism comprises a module mounting seat and a module milling cutter, the battery module is fixed on the module mounting seat, and the module milling cutter can mill holes in the pole positions of the battery module.

[0008] Preferably, the module mounting seat is connected with an oscillating motor through an eccentric shaft, the oscillating motor can move in a horizontal direction, the oscillating motor drives the module mounting seat to make a circular motion relative to the output shaft of the oscillating motor, and the oscillating range of the module mounting seat covers the poles of the battery module.

[0009] Preferably, the milling cutter is fixed on a lifting platform, and a blowing nozzle is arranged on the lifting platform and faces the end of the milling cutter.

[0010] Preferably, the module mounting seat comprises a mounting plate, two vertical baffles perpendicular to each other are arranged on the mounting plate, four fixing rods respectively located at four corners of the battery module are arranged on the mounting plate, a pressing block is arranged at the end of each fixing rod, and a handle for driving the pressing block to rotate is arranged on the fixing rod.

[0011] Preferably, the battery cell pole milling mechanism comprises a battery cell mounting seat and a battery cell milling cutter, the battery cell is fixed in the battery cell mounting seat, a battery cell pressing plate is arranged on the battery cell mounting seat, and the battery cell pole protrudes relative to the battery cell pressing plate.

[0012] Preferably, the battery cell mounting seat comprises a plurality of battery cell slots, and a lifting plate is arranged at the bottom of each battery cell slot.

[0013] Preferably, the battery cell mounting seat comprises an enclosed box body, a partition plate is arranged in the middle of the box body in a horizontal direction, the cylinder is fixed below the partition plate and fixedly connected with the lifting plate through the partition plate, a battery cell baffle is arranged on the partition plate between adjacent lifting plates, a movable door is arranged on one side of the box body perpendicular to the battery cell baffle, the battery cell pressing plate is fixed on the top of the box body, and a plurality of pole through holes are arranged on the battery cell pressing plate and matched with the positions of the battery cells in the battery cell slots.

[0014] Preferably, the battery cell film tearing mechanism comprises a clamping block for fixing the battery cell and a clamping part for clamping and fixing the PET film, the two ends of the clamping part are hingedly fixed on two parallel pull rods of a frame, and the frame can rotate to make the clamping part away from the surface of the battery cell.

[0015] Preferably, the clamping block is mounted on an operating panel, the frame is rotatably matched with the operating panel, the clamping portion includes a fixed plate fixedly connected to the frame at both ends and a hinged plate hingedly matched with the fixed plate at one end, the fixed plate and the hinged plate are respectively provided with U-shaped grooves with upper ends open at both ends, the positions of the U-shaped grooves at both ends of the fixed plate and the hinged plate are respectively overlapped, and a bolt is hingedly provided at both ends of the fixed plate, the bolt can be rotatably clamped in the U-shaped groove, and the bolt is threaded with a hand-tightened nut.

[0016] The advantages of the battery disassembly system provided by the present invention are as follows: the module pole milling mechanism is used to mill holes in the module pole to remove the welds, thereby separating the module pole from the module upper cover plate, so that the battery cell can be taken out of the battery module, and then the surface of the battery pole is milled by the battery pole milling mechanism to remove the welds on the battery pole and remove the welded battery pole. Finally, the PET film on the battery cell is torn off by the battery cell tearing mechanism, and the battery cell is recycled for reuse, thereby completely completing the disassembly and recycling of the battery module. The eccentric rotation of the driving module mounting seat facilitates the expansion of the milling hole range and ensures that the welds are cleaned. When the module is disassembled, the battery module is fixed by the pressing block and the module pressing plate to ensure the disassembly quality; the battery pole protruding from the battery pole plate is milled by the battery milling cutter to clean the welds of the battery pole, and the battery cell is fixed by the lifting plate to expose the battery pole, which is convenient for fixing and milling. When tearing the film, the battery cell is clamped by the clamping block, the end of the PET film is clamped and fixed by the clamping part, and the film is torn off by controlling the rotation of the clamping part, which is convenient for control. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a module pole milling mechanism of a battery module disassembly system provided by an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of a module mounting base of a battery module disassembly system provided by an embodiment of the present invention;

[0019] Figure 3 An exploded view of a module mounting base of a battery module disassembly system provided by an embodiment of the present invention;

[0020] Figure 4 A schematic diagram of a cell mounting seat of a battery module disassembly system provided by an embodiment of the present invention;

[0021] Figure 5 An exploded view of a cell mounting seat of a battery module disassembly system provided by an embodiment of the present invention;

[0022] Figure 6 A schematic diagram showing the state of cooperation between a cell mounting seat and a cell of a battery module disassembly system provided by an embodiment of the present invention;

[0023] Figure 7 for Figure 5 A partial enlarged view of part A;

[0024] Figure 8 A schematic diagram of the magnetic structure of a cell mounting seat of a battery module disassembly system provided in an embodiment of the present invention;

[0025] Figure 9 A schematic diagram of a cell film tearing mechanism of a battery module disassembly system provided in an embodiment of the present invention;

[0026] Figure 10 for Figure 9 The image of part B in the middle is not enlarged. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the following describes the technical solutions of the present invention clearly and completely with reference to specific embodiments and the accompanying drawings. It is obvious that the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] This embodiment provides a battery module disassembly system for disassembling the battery module to obtain the battery cell, and then disassembling the battery cell. Specifically, Figure 1 The module pole milling mechanism 2 shown is used to mill holes at the pole positions of the battery module 1. Figure 4 The cell pole milling mechanism 3 shown is used to mill the surface of the cell pole 13, and Figure 9 The cell film tearing mechanism 4 shown is for tearing off the PET film of the cell.

[0029] In this embodiment, the module pole milling mechanism 2 mills the module pole 11 to remove the weld, thereby separating the module pole 11 from the module upper cover, so that the battery cell 12 can be taken out of the battery module 1, and then the battery cell pole milling mechanism 3 is used to mill the surface of the battery cell pole 13 to remove the weld on the battery cell pole 13 and remove the welded battery cell pole. Finally, the battery cell film tearing mechanism 4 is used to tear off the PET film on the battery cell and recycle the battery cell for reuse, thereby completely completing the disassembly and recycling of the battery module.

[0030] Combine Figure 1 and Figure 2The module pole post milling mechanism 2 includes a module mounting seat 21 and a module milling cutter 22, the battery module 1 is fixed on the module mounting seat 21, and the module milling cutter 22 can mill the position of the module pole post 11 of the battery module 1. Thus, the upper end cover plate of the battery module 1 can be separated from the lower end cover plate, and the internal battery cell 12 is convenient to take out.

[0031] The module mounting seat 21 is connected with a swing motor 23 through an eccentric shaft 231, when the swing motor 23 rotates, the module mounting seat 21 is driven by the eccentric shaft to make a circular swing relative to the output shaft of the swing motor, the position of the milling cutter 22 is fixed, so as to mill a larger hole at the position of the pole post 11, and the battery module 1 is convenient to disassemble. In order to prevent the module mounting seat 21 from rotating, the module mounting seat 21 can be in sliding fit with an XY motion platform, specifically, the module mounting seat 21 can be in sliding fit with the Y-direction slide rod of the motion platform, and the Y-direction slide rod is in sliding fit with the X-direction slide rod, so that the module mounting seat 21 can only make translational motion in the plane, and cannot make rotational motion.

[0032] The milling cutter 22 is fixed on a lifting platform 221, only the height of the milling cutter 22 needs to be adjusted, the processing position of the milling cutter 22 is adjusted by adjusting the position of the swing motor 23 in the horizontal direction, and a blowing nozzle 222 towards the end of the milling cutter 22 is arranged on the lifting platform 221, so as to blow away the milling debris. Here, a negative pressure suction nozzle can also be selected to suck the debris into a waste box for subsequent treatment.

[0033] Reference Figure 2 And Figure 3 The module mounting seat 21 includes a mounting plate 24, two vertical baffles 26 perpendicular to each other are arranged on the mounting plate 24, four fixed rods 25 at four corners of the battery module 1 are arranged on the mounting plate 24, a pressing block 251 and a handle 252 for driving the pressing block 251 to rotate are arranged at the end of the fixed rod 25, the pressing block 251 is pressed on the bolt fixing position at the four corners of the battery module 1 through the handle 252, the handle 252 and the pressing block 251 constitute a quick clamping structure, so as to facilitate fixing and separation, and the specific structure can be selected according to the existing product. After the battery module 1 is fixed, the module pole post 11 is processed by milling, and the specific processing position can be adjusted and confirmed manually or input by a PLC controller to automatically mill the position of the module pole post 11.

[0034] When the battery module 1 is fixed, the battery module 1 is placed on the mounting plate 24 and one corner of the battery module 1 is abutted against two vertical baffles 26, and then the pressing block 251 is driven by the handle 252 to press the battery module 1, and in the embodiment, a separable module pressing plate 27 is further arranged above the battery module 1, the module pressing plate 27 has a flange around to be clamped above the battery module 1, so as to fix the battery module and prevent the upper cover of the module from loosening and causing deviation of the processing position during the hole milling process. A jacking nut 271 is arranged on one side of the module pressing plate 27, which can be tightened against the surface of the battery module 1 to fix the battery module 1 and the module pressing plate 27 together; the surface of the module pressing plate 27 has a hollow through hole to facilitate the milling cutter to pass through the through hole to mill the module tab 11.

[0035] Referring to Figure 4 and Figure 5 , the cell post milling mechanism 3 includes a cell mounting seat (not shown in the figure) and a cell milling cutter (not shown in the figure), the cell 12 is fixed in the cell mounting seat, the cell mounting seat includes a cell pressing plate 31, the cell post 13 protrudes relative to the cell pressing plate 31, the cell milling cutter rotates along the surface of the cell pressing plate 31 to mill, and the protruding part of the cell post 13 is milled, the cell mounting seat can move in the plane, and a plurality of cells 12 are fixed on the cell mounting seat, so that a plurality of cell posts 13 can be milled at the same time.

[0036] The cell mounting seat includes a plurality of cell slots (not shown in the figure), and each cell slot is provided with a lifting plate 32 at the bottom, and the lifting plate 32 is fixedly matched with the output end of the air cylinder 33, so that the lifting plate 32 is driven to lift by the air cylinder 33.

[0037] Referring to Figure 5 , the cell mounting seat includes an enclosed box body 34, a partition plate 35 is arranged in the middle of the box body 34 in the horizontal direction, and the air cylinder 33 is fixed above and below the partition plate 35 and fixedly connected with the lifting plate 32 through the partition plate 35. The partition plate 35 is provided with a cell baffle 36 between adjacent lifting plates 32, one side of the box body 34 perpendicular to the cell baffle 36 is provided with a movable door 37, and the box body 34 is fixed with the cell pressing plate 31; in combination Figure 6 , the cell pressing plate 31 is provided with a plurality of post through holes 311 matched with the positions of the cell posts 13 in the cell slots.

[0038] The reinforcing block 312 can be arranged on the cell pressing plate 31 as needed to improve the structural strength and ensure the flatness of the entire cell pressing plate 31, preventing partial warping from affecting the milling effect. In the embodiment, the pole post through hole 311 is arranged in two parallel rows and distributed on both sides of the cell pressing plate 31. The reinforcing block 312 is fixed on the upper surface of the cell pressing plate 31 and has an overall I-shaped structure to avoid the pole post through hole 311.

[0039] With reference to Figure 7 , the lifting plate 32 is further fixed with a guide rod 321 at both ends, and the guide rod 321 is in sliding fit with the partition plate 35 to guide the lifting plate 32 and ensure balanced movement.

[0040] In combination Figure 4 and Figure 8 , the movable door 37 is hinged to one side of the box body 24. A handle 371 is arranged on the outside of the opening side of the movable door 37, and a magnet 372 is arranged on the inside of the opening side of the movable door to facilitate attraction and fixation with the side of the box body 24.

[0041] In operation, the movable door 37 is first opened by the handle, and then the cell 12 is placed in the cell slot one by one so that the cell 12 is on the lifting plate 32. Then the movable door 37 is closed, and the cylinder 33 is controlled to rise to lift the cell 12 upward, so that the cell pole 13 passes through the pole lug through hole 311.

[0042] To ensure that multiple cylinders 33 extend synchronously, multiple cylinders 33 are controlled by the same valve 331, and the valve 331 is arranged on the same workbench as the box body 34 to facilitate operation.

[0043] The cell film tearing mechanism 4 can adopt existing technologies, such as the scheme provided in the invention patent application with publication number CN113839116A. The structure of the cell film tearing mechanism 4 provided in the application is shown in Figure 9 , which includes a clamping block 41 for fixing the cell 12 and a clamping portion 42 for clamping and fixing the PET film. The structure of the clamping block 41 is the same as that in CN113839116A. The clamping block 41 is fixed on an operation plate 43. The two ends of the clamping portion 42 are hingedly fixed on two parallel pull rods 441 of a frame 44. The rotating ends of the two pull rods 441 are connected by a connecting rod 442. The surface of the connecting rod 442 is provided with a rubber sleeve or the like for convenient hand holding, thereby facilitating the user to rotate and operate the frame 44.

[0044] In combination Figure 9 and Figure 10The frame 44 is rotationally matched with the operation plate 43, the clamping part 42 comprises a fixed plate 421 fixedly connected with the frame 44 at two ends and a hinged plate 422 hingedly matched with the fixed plate 421 at one end, U-shaped grooves 423 with upper end openings are arranged at two ends of the fixed plate 421 and the hinged plate 422 respectively, the positions of the U-shaped grooves 423 at two ends of the fixed plate 421 and the hinged plate 422 coincide respectively, a bolt 424 is hingedly arranged at two ends of the fixed plate 421 respectively, specifically, a fixed frame 425 is arranged on the fixed plate 421 at the position of the U-shaped groove 423, the bolt 424 is hingedly arranged on the fixed frame 425, so that the bolt 424 can be rotationally clamped in the U-shaped groove 423, and a hand nut 426 is arranged on the bolt 424.

[0045] When the film is torn, a part of the PET film can be manually lifted, the hand nut 426 is rotated, then the bolt 424 is immediately rotated in the U-shaped groove 423, the rotation of the hinged plate 422 is controlled, so that the hinged plate 422 is rotated and opened along the horizontal direction relative to the fixed plate 421, the end of the PET film is placed on the fixed plate 421, the hinged plate 422 is rotated to clamp the PET film, the bolt 424 is rotationally clamped in the U-shaped groove 423, the fixed plate 421 and the hinged plate 422 are locked through the hand nut 426, the fixation of the PET film is completed, then the frame 44 is rotated, and the PET film is torn from the fixed battery cell 13.

[0046] The film tearing method of the battery cell module film tearing system provided by the application is as follows:

[0047] The battery module is torn, the battery module 1 is clamped and fixed on the module mounting seat 21, the swing motor 23 is controlled to move to the working position, the module milling cutter 22 is lowered, the swing motor 23 is rotated to control the battery module 1 to swing and mill holes, and the debris is cleaned through the air nozzle;

[0048] The battery cell welding seam is torn, the battery cell 12 is inserted into the battery cell slot, the jacking air cylinder 33 allows the battery cell pole 13 to pass through the battery cell pressing plate 31, the battery cell milling cutter is controlled to rotate and is lowered above the battery cell pressing plate 31, and the battery cell pressing plate 31 can be contacted or not contacted, and the battery cell mounting seat is controlled to move and is washed and disinfected;

[0049] The battery cell film is torn, the battery cell is clamped in the clamping block 41, the end of the PET film is clamped and fixed through the clamping part 42, and then the clamping part 42 is rotated to tear the film.

[0050] The above examples are only used to illustrate the technical solutions of the application, but not limit the application; although the application is described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified or some technical features can be replaced equivalently; and the modification or replacement does not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solutions of the embodiments of the application.

Claims

1. A battery module disassembly system, characterized by: It includes a module pole milling mechanism for milling holes in the pole positions of the battery module, a battery cell pole milling mechanism for milling the surface of the battery cell pole, and a battery cell film tearing mechanism for tearing off the PET film of the battery cell; The module pole milling mechanism includes a module mounting seat and a module milling cutter. The battery module is fixed on the module mounting seat. The module milling cutter can mill holes at the pole positions of the battery module. The upper end of the battery module is detachably covered with a module pressing plate, the surface of which has a hollow structure that exposes the module poles; the module pressing plate has flanges around it to snap on the upper part of the battery module, thereby fixing the battery module and preventing the upper cover of the module from loosening during the milling process; The battery cell pole milling mechanism includes a battery cell mounting seat and a battery cell milling cutter. The battery cell is fixed in the battery cell mounting seat. A battery cell pressure plate is provided on the battery cell mounting seat. The battery cell pole protrudes relative to the battery cell pressure plate. The battery cell milling cutter mills the protruding portion of the battery cell pole. The battery cell mounting seat can move in a plane. The battery cell mounting seat includes a plurality of battery cell slots, and a lifting plate is provided at the bottom of each battery cell slot, and the lifting plate is fixedly matched with the output end of the cylinder; the plurality of cylinders are controlled by the same valve; The battery cell mounting seat comprises an enclosed box body, wherein a partition is arranged in the middle of the box body along the horizontal direction; A guide rod is fixedly provided at both ends of the lifting plate, and the guide rod is slidably matched with the partition to guide the lifting plate to ensure its balanced movement.

2. A battery module disassembly system according to claim 1, characterized in that: The module mounting seat is connected to a swing motor through an eccentric shaft. The swing motor can move in the horizontal direction. The swing motor drives the module mounting seat to perform circular motion relative to the output shaft of the swing motor. The swing range of the module mounting seat covers the module pole.

3. The battery module disassembly system according to claim 1, characterized in that: The milling cutter is fixed on a lifting platform, and an air blowing nozzle facing the end of the milling cutter is also provided on the lifting platform.

4. The battery module disassembly system according to claim 1, characterized in that: The module mounting seat includes a mounting plate, on which are provided two vertical baffles perpendicular to each other, and on which are provided four fixing rods located at the four corners of the battery module. The ends of the fixing rods are provided with pressure blocks and handles for driving the pressure blocks to rotate, and the handles control the pressure blocks to be pressed on the bolt fixing positions at the four corners of the battery module.

5. The battery module disassembly system according to claim 1, characterized in that: The cylinder is fixed under the partition and is fixedly connected to the lifting plate through the partition. The partition is provided with a battery cell baffle located between adjacent lifting plates. A movable door is provided on a side of the box body that is perpendicular to the battery cell baffle. The battery cell pressure plate is fixed on the top of the box body. The battery cell pressure plate is provided with a plurality of pole through holes that match the battery cell positions in the battery cell slots.

6. The battery module disassembly system according to claim 1, characterized in that: The battery cell film tearing mechanism includes a clamping block for fixing the battery cell and a clamping part that can clamp and fix the PET film. The two ends of the clamping part are hinged and fixed on two parallel pull rods of a frame, and the frame can be rotated to make the clamping part leave the surface of the battery cell.

7. A battery module disassembly system according to claim 6, characterized in that: The clamping block is mounted on an operating panel, and the frame is rotatably matched with the operating panel. The clamping portion includes a fixed plate fixedly connected to the frame at both ends and a hinged plate hingedly matched with the fixed plate at one end. Both ends of the fixed plate and the hinged plate are respectively provided with U-shaped grooves with upper ends open, and the positions of the U-shaped grooves at both ends of the fixed plate and the hinged plate respectively coincide with each other. Both ends of the fixed plate are hingedly provided with a bolt, and the bolt can be rotatably clamped in the U-shaped groove. The bolt is threaded with a hand nut.

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