Z-shaped diaphragm waste lithium iron phosphate battery pack layer-by-layer disassembling equipment

Abstract

The application relates to the technical field of battery useful part regeneration, and discloses a Z-shaped diaphragm waste old lithium iron phosphate battery pack layer-by-layer disassembling equipment which comprises a base, a lifting table for placing an external Z-shaped laminated battery is embedded in the middle of the base, and a truss is fixedly connected to the upper surface of the base; a film pulling module comprises a sliding seat which slides horizontally with the outer surface of the truss, a side plate is fixedly connected to the lower surface of the sliding seat, and a rotating seat is rotationally connected to the inside of the side plate. The Z-shaped diaphragm waste old lithium iron phosphate battery pack layer-by-layer disassembling equipment can effectively solve the problem that in the prior art, a waste old lithium iron phosphate battery disassembling process usually adopts a treatment mode of first crushing and then sorting, the whole battery is crushed, and then valuable components are separated through physical or chemical methods, but in the crushing process, the diaphragm, the positive plate and the negative plate are mixed with each other, the subsequent sorting is difficult, the recovery purity is low, and resource waste is caused.

Description

Technical Field

[0001] This invention relates to the field of battery recycling technology, specifically to a Z-type separator waste lithium iron phosphate battery pack layer by layer dismantling equipment. Background Technology

[0002] With the rapid development of new energy vehicles and the energy storage industry, lithium iron phosphate batteries have been widely used in electric vehicles, energy storage power stations, and power tools due to their advantages of long cycle life, good thermal stability, and low cost. The recycling and dismantling of used lithium iron phosphate batteries is a core process for the cascade utilization and resource regeneration of power batteries. Compared to traditional wound lithium batteries, stacked Z-type separator lithium iron phosphate batteries use a structure where a single separator is repeatedly folded to wrap multiple positive and negative electrode sheets.

[0003] In existing technologies, the dismantling process of waste lithium iron phosphate batteries mostly adopts the method of crushing first and then sorting. After the battery is crushed as a whole, valuable components are separated by physical or chemical methods. However, during the crushing process, the separator, positive electrode and negative electrode are mixed together, which makes subsequent sorting difficult, results in low recycling purity, and causes waste of resources. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a Z-type separator waste lithium iron phosphate battery pack layer-by-layer dismantling device. This device effectively solves the problem that existing waste lithium iron phosphate battery dismantling processes often employ a process of first crushing and then sorting. After the battery is crushed as a whole, valuable components are separated through physical or chemical methods. However, during the crushing process, the separator, positive electrode, and negative electrode are mixed together, making subsequent sorting difficult, resulting in low recycling purity and resource waste.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a layer-by-layer dismantling device for Z-type diaphragm waste lithium iron phosphate battery packs, comprising: The base has a lifting platform embedded in its middle for placing external Z-shaped stacked batteries, and a truss is fixedly connected to the upper surface of the base. A membrane stretching module includes a sliding seat that slides horizontally with the outer surface of a truss. A side plate is fixedly connected to the lower surface of the sliding seat. A rotating seat is rotatably connected inside the side plate. A clamping head is slidably connected to the inner surface of the rotating seat. Two side plates and two rotating seats are provided and symmetrically distributed at both ends of the clamping head. An anti-stick component for separating the diaphragm and the electrode sheet is provided on the outer surface of the clamping head. The anti-stick component includes an extension platform disposed above the clamping head. The upper surface of the extension platform is fixedly connected to the lower surface of the sliding seat. The extension platform is slidably connected to a sliding frame via a groove formed on its lower surface. A vertical plate is fixed to the bottom end of the sliding frame.

[0006] Furthermore, it also includes a separation module, which includes a connecting frame that slides horizontally with the outer surface of the truss, and a roller is rotatably connected inside the connecting frame.

[0007] Furthermore, two vertical plates are provided, and a separation head is integrally formed at the bottom end of each vertical plate. The separation head gradually narrows in thickness from top to bottom to form a pointed tip. A reversing component is provided on the inner side of the side plate, and the two vertical plates are distributed on the left and right sides of the clamping head along its radial direction.

[0008] Furthermore, the clamping head includes two semi-circular rods, which are slidably connected to the inner surface of the rotating seat via sliders located at their ends.

[0009] Furthermore, the reversing component includes a hinged swing arm that is rotatably connected to the side plate near the clamping head. The outer end of the hinged swing arm is hinged to a connecting rod. The sliding frame is fixedly connected to a limit block near the side plate. The interior of the hinged swing arm has an elongated groove that fits against the outer surface of the limit block.

[0010] Furthermore, a slide rail seat is fixedly connected to the side of the side plate near the clamping head, and a sliding block is slidably connected inside the slide rail seat. The bottom end of the sliding block is hinged to the end of the connecting rod away from the hinged swing arm, and a spring is provided on the upper surface of the sliding block and connected to the top of the inner wall of the slide rail seat.

[0011] Furthermore, the middle part of the sliding frame adopts a hollow design, and an adhesive tank is provided above the clamping head. The upper surface of the adhesive tank is fixedly installed at the bottom of the expansion platform.

[0012] Furthermore, a ratchet is fixedly connected to the side of the hinged swing arm away from the side plate, and a bracket is fixedly connected to the upper surface of the base. The bracket is rotatably connected to a pawl via a rotating shaft on its upper surface. Each bracket has two sets of pawls, which are distributed on both sides of the lifting platform. A limiting baffle fixedly connected to the inside of the bracket is provided on the side of the pawl closest to the lifting platform. A torsion spring connected to the inside of the pawl is sleeved on the outer circumference of the rotating shaft.

[0013] The technical solution provided by this invention has the following advantages compared with the prior art: 1. In existing technologies, the dismantling of waste Z-type stacked batteries mostly employs manual peeling or simple mechanical pulling methods. Due to electrolyte residue in waste batteries, the adhesion between the electrodes and the separator increases. Traditional dismantling methods easily result in multiple layers of separator being simultaneously peeled off, and the electrodes being rolled up along with the separator, causing mixing of separators and electrodes, making subsequent sorting and recycling difficult. This invention uses a clamping head to clamp and wind the starting end of the separator, while a separating head inserts into the gap between the separator and the electrode during the winding process, separating them layer by layer. The pointed structure of the separating head effectively disrupts the adhesion interface between the electrode and the separator, acting only on the edge area of ​​the current winding layer without affecting the lower layers, thus achieving complete peeling of a single layer of separator. This improves the separation effect between the separator and the electrode, facilitating subsequent separate recycling.

[0014] 2. The structural feature of Z-type stacked cells is that the internal separators are stacked in a Z-shape, with adjacent separator layers wound in opposite directions. In existing technologies, fixed-position separation devices cannot accommodate this bidirectional winding requirement. During reversal, manual adjustment of the separation tool position is often required, resulting in low disassembly efficiency. This invention utilizes a ratchet and pawl to automatically switch the separation head between the left and right sides of the clamping head. When the clamping head rotates clockwise and moves to the right, the separation head is on the left side, separating the electrode below the first separator layer. When the clamping head rotates counterclockwise and moves to the left, the ratchet engages with the right-side pawl, driving the hinged swing arm to automatically switch the separation head to the right side, separating the electrode below the second separator layer. This eliminates the need for manual intervention and enables continuous, automated disassembly, significantly improving efficiency.

[0015] 3. Existing fixed-blade separation structures involve rigid, hard contact. As the diaphragm winding time increases, the thickness of the outer circumference of the clamping head increases. If the blade position remains unchanged, the diaphragm will be damaged. Existing fixed blades lack elastic compensation structures, easily scratching the recycled battery material. This invention incorporates a slide rail, a sliding block, and a spring. The spring continuously applies a downward preload to the sliding block, ensuring the hinged arm always tends to retract towards the clamping head, guaranteeing the wedge-shaped tip of the separation head remains firmly in contact with the outer circumference of the clamping head. When there is a deviation in the diaphragm roll thickness on the outer circumference of the clamping head, the spring's extension and retraction can achieve adaptive gap compensation, always maintaining a small contact gap between the tip and the roller. This prevents rigid compression and scratching of the diaphragm and electrode sheets, and also prevents electrode sheets from entering the diaphragm winding area. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention; Figure 2 This is a schematic diagram of the connecting frame and roller body according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the sliding seat, side plate, extension platform and vertical plate in an embodiment of the present invention; Figure 4 This is a cross-sectional structural diagram of the side plate and clamping head according to an embodiment of the present invention; Figure 5 This is an embodiment of the present invention. Figure 4 A magnified structural diagram of part A in the middle; Figure 6 This is an embodiment of the present invention. Figure 4 A magnified structural diagram of section B in the middle; Figure 7 This is a schematic diagram of the separation structure of the film-pulling module according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the adhesive release assembly and the semi-circular rod according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the side plate, reversing component, and ratchet in an embodiment of the present invention; Figure 10 This is a schematic diagram of the structure of a Z-type stacked lithium iron phosphate battery according to an embodiment of the present invention.

[0018] The labels in the diagram represent: 1. Base; 11. Lifting platform; 12. Truss; 13. Support; 2. Film stretching module; 21. Sliding seat; 22. Side plate; 23. Rotating seat; 24. Clamping head; 241. Semi-circular rod; 25. Anti-stick component; 251. Extension platform; 252. Sliding frame; 2521. Limiting block; 253. Vertical plate; 2531. Separating head; 26. Reversing component; 261. Hinge swing arm; 2611. Long oval groove; 262. Connecting rod; 263. Slide rail seat; 264. Sliding block; 265. Spring; 27. Glue tank; 28. Ratchet; 281. Pawl; 282. Limiting baffle; 283. Torsion spring; 3. Separating module; 31. Connecting frame; 32. Roller. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] The present invention will be further described below with reference to embodiments.

[0021] Example: Please see Figures 1-10 This invention provides a technical solution: a layer-by-layer dismantling device for Z-type diaphragm waste lithium iron phosphate battery packs, comprising: The base 1 has a lifting platform 11 for placing external Z-shaped stacked batteries embedded in its middle, and a truss 12 is fixedly connected to the upper surface of the base 1. The membrane stretching module 2 includes a sliding seat 21 that slides horizontally with the outer surface of the truss 12. A side plate 22 is fixedly connected to the lower surface of the sliding seat 21. A rotating seat 23 is rotatably connected inside the side plate 22. A clamping head 24 is slidably connected to the inner surface of the rotating seat 23. Two side plates 22 and two rotating seats 23 are provided and symmetrically distributed at both ends of the clamping head 24. An anti-stick component 25 for separating the diaphragm and the electrode sheet is provided on the outer surface of the clamping head 24. The anti-stick component 25 includes an extension platform 251 disposed above the clamping head 24. The upper surface of the extension platform 251 is fixedly connected to the lower surface of the sliding seat 21. The extension platform 251 is slidably connected to a sliding frame 252 through a groove formed on its lower surface. A vertical plate 253 is fixed to the bottom end of the sliding frame 252.

[0022] It also includes a separation module 3, which includes a connecting frame 31 that slides horizontally on the outer surface of the truss 12, and a roller 32 is rotatably connected inside the connecting frame 31.

[0023] There are two vertical plates 253. The bottom end of the vertical plate 253 is integrally formed with a separation head 2531. The separation head 2531 gradually narrows in thickness from top to bottom to form a pointed tip. A reversing member 26 is provided on the inner side of the side plate 22. The two vertical plates 253 are distributed on the left and right sides of the clamping head 24 along the radial direction.

[0024] The clamping head 24 includes a semi-circular rod 241, and two semi-circular rods 241 are provided. The semi-circular rods 241 are slidably connected to the inner surface of the rotating seat 23 by a slider provided at its end.

[0025] The reversing component 26 includes a hinged swing arm 261 that is rotatably connected to the side plate 22 near the clamping head 24. The outer end of the hinged swing arm 261 is hinged to a connecting rod 262. A limit block 2521 is fixedly connected to the side of the sliding frame 252 near the side plate 22. An elongated groove 2611 that fits against the outer surface of the limit block 2521 is provided inside the hinged swing arm 261.

[0026] A slide rail seat 263 is fixedly connected to the side plate 22 near the clamping head 24. A sliding block 264 is slidably connected inside the slide rail seat 263. The bottom end of the sliding block 264 is hinged to the end of the connecting rod 262 away from the hinged swing arm 261. A spring 265 is provided on the upper surface of the sliding block 264 and connected to the top of the inner wall of the slide rail seat 263.

[0027] The middle part of the sliding frame 252 is hollowed out. A glue tank 27 is provided above the clamping head 24. The upper surface of the glue tank 27 is fixedly installed at the bottom of the expansion table 251. The glue outlet of the glue tank 27 faces the position above the clamping head 24 and is used to apply glue to the surface of the diaphragm that is wound and folded above the clamping head 24.

[0028] A ratchet 28 is fixedly connected to the side of the hinged swing arm 261 away from the side plate 22. A bracket 13 is fixedly connected to the upper surface of the base 1. A pawl 281 is rotatably connected to the bracket 13 via a rotating shaft on its upper surface. Two sets of pawls 281 are provided in each bracket 13. The two sets of pawls 281 are distributed on both sides of the lifting platform 11. A limiting baffle 282 fixedly connected to the inside of the bracket 13 is provided on the side of the pawl 281 closest to the lifting platform 11. A torsion spring 283 connected to the inside of the pawl 281 is sleeved on the outer circumference of the rotating shaft. Under normal conditions, the torsion spring 283 provides an elastic force to the pawl 281 to move towards the lifting platform 11, so that the pawl 281 remains in an upward vertical state.

[0029] Pre-treatment and initial clamping: Initially, the waste lithium iron phosphate battery pack is pre-treated using external cutting equipment to remove the outer casing, protective film, and other external structures, exposing the internal Z-shaped stacked cells. The Z-shaped stacked lithium iron phosphate battery to be disassembled consists of three parts: a separator, a positive electrode, and a negative electrode. The pre-treated battery pack is then placed on the upper surface of the lifting platform 11 in the base 1. The negative pressure holes on the lifting platform 11 are connected to an external negative pressure device, generating a downward suction force on the Z-shaped stacked cells, thus fixing the battery pack in place and ensuring that it does not shift during disassembly, guaranteeing the precision of the layer-by-layer separation of the electrodes and separator.

[0030] When placing the Z-type stacked battery, the starting end of its separator is positioned at the upper left corner, and correspondingly, the sliding seat 21 is initially positioned on the left side of the truss 12. At this time, the rotating seat 23 controls the two semi-circular rods 241 to move in opposite directions, forming a gap between the two semi-circular rods 241, clamping the starting end of the separator between the two semi-circular rods 241 from below; then, the two semi-circular rods 241 are driven to move in opposite directions, and the two combine to form a complete cylinder, clamping and fixing the starting end of the separator.

[0031] Initially, the articulated arm 261 is tilted to the upper right. Its internal elongated groove 2611, through the limiting block 2521, drives the sliding frame 252, vertical plate 253, and separating head 2531 to simultaneously occupy the right side of its travel range (based on the extension platform 251). Under the action of the spring 265, the spring 265 provides a downward pushing force to the sliding block 264, causing the angle between the articulated arm 261 and the connecting rod 262 to tend to decrease, increasing the tilt of the articulated arm 261, thereby causing the separating head 2531 at the bottom of the vertical plate 253 to press against the outer circumferential surface of the left side of the clamping head 24. In bracket 13, under the elastic force of torsion spring 283, the right side of the pawl 281 in the left group is in contact with the left side of the limiting baffle 282, and the left side of the pawl 281 in the right group is in contact with the right side of the limiting baffle 282. Both groups of pawls 281 remain upright, preparing for subsequent engagement with ratchet 28. It should be noted that the distance between the two vertical plates 253 on the outer side of the clamping head 24 is greater than the diameter of the semi-circular rod 241. When the left separating head 2531 is in contact with the outer surface of the clamping head 24, the right separating head 2531 maintains a large distance from the clamping head 24, meaning that only the left separating head 2531 performs the separating function at this time.

[0032] Forward winding and separation of the first diaphragm: After the clamping head 24 clamps the starting end of the diaphragm, the rotating seat 23 on the side plate 22 begins to rotate clockwise around its axis. While the rotating seat 23 is winding the diaphragm clockwise, it moves to the right along the truss 12 along with the sliding seat 21. During the winding process, it is equivalent to extending the lower surface of the diaphragm from the left side of the columnar clamping head 24, and the lower surface of the diaphragm is folded onto the outer circumferential surface of the clamping head 24.

[0033] Because the left-side separating head 2531 is in contact with the outer surface of the clamping head 24, and the tip of the separating head 2531 faces downwards, during the winding and folding of the diaphragm, the tip of the separating head 2531 inserts between the diaphragm and the electrode, separating the electrode on the lower surface of the diaphragm layer, thus preventing the diaphragm from sticking to the electrode. This effectively avoids the situation where multiple layers of diaphragms are peeled off from the same side at once due to electrolyte residue and high viscosity, ensuring the complete peeling of a single layer of diaphragm.

[0034] After the diaphragm has been wound around the clamping head 24 once, the glue tank 27 begins to work, applying glue to the surface of the diaphragm that has flipped over the clamping head 24 through its glue outlet. The purpose of applying glue is to ensure that the subsequently wound diaphragm layers can be bonded and fixed together to form a regular roll.

[0035] The rotating seat 23 winds the diaphragm clockwise while following the sliding seat 21 to the right on the truss 12 until it reaches the right end of the battery pack. During this process, the ratchet 28 on the clamping head 24 and the hinged swing arm 261 passes the pawl 281 located on the right side. When the ratchet 28 moves from left to right, the teeth at the bottom of the ratchet 28 pass the pawl 281 on the right side. Since there is no obstruction on the right side of the pawl 281 (the limiting baffle 282 is located on its left side), the pawl 281 is pushed to the right by the teeth at the bottom of the ratchet 28, the torsion spring 283 is compressed, and the pawl 281 rotates clockwise around its axis, allowing the ratchet 28 to pass smoothly. At this time, the sliding frame 252, the vertical plate 253, and the separating head 2531 are still in the right position within their stroke range, and the left separating head 2531 continues to separate the lower surface electrode of the wound diaphragm.

[0036] After the ratchet 28 has completely passed the right pawl 281, the right pawl 281 returns to its upright position under the elastic restoring force of the torsion spring 283. At this time, the glue tank 27 stops coating the diaphragm at the top of the clamping head 24, and the clamping head 24 rotates clockwise half a turn again to bond the new section of diaphragm to the outer surface of the last coated diaphragm, completing the winding of one layer of diaphragm.

[0037] The reverse winding and separation of the second diaphragm: After the first layer of diaphragm is wound, the clamping head 24 is driven to rotate in the opposite direction, that is, from clockwise to counterclockwise rotation. At this time, the new diaphragm will extend upwards from the right side of the clamping head 24, that is, the winding direction of the new layer of diaphragm is opposite to that of the previous layer. Correspondingly, the slide block 21 no longer moves to the right, but instead moves to the left.

[0038] As the sliding seat 21 moves to the left, the pawl 281 on the right side is prevented from swinging counterclockwise by the limiting baffle 282, and remains upright, engaging with the teeth below the ratchet 28. The ratchet 28 continues to move to the left with the articulated rocker arm 261, and the engagement of the pawl 281 with the teeth of the ratchet 28 drives the articulated rocker arm 261 to swing counterclockwise around the axis of the ratchet 28.

[0039] During the counterclockwise swing of the hinged arm 261, the angle between the hinged arm 261 and the connecting rod 262 gradually increases. The connecting rod 262 pushes the sliding block 264 to slide upward along the inner wall of the slide rail seat 263. The spring 265 is subjected to the upward lifting force of the sliding block 264 and gradually begins to compress. When the angle between the hinged arm 261 and the connecting rod 262 reaches 180 degrees, the hinged arm 261 is in a horizontal state; the hinged arm 261 continues to rotate counterclockwise and eventually reaches a state tilted to the upper left.

[0040] Meanwhile, the limiting block 2521 at the outer end of the sliding frame 252 remains inside the elongated groove 2611, moving along with the groove. As the hinged arm 261 tilts from the upper right to the upper left, the elongated groove 2611 drives the limiting block 2521 and the sliding frame 252 to move from the right to the left along the slide of the expansion platform 251. The leftward movement of the sliding frame 252 causes the two vertical plates 253 and the separating head 2531 to move to the left relative to the expansion platform 251. Finally, the separating head 2531 on the right side comes into contact with the diaphragm surface wound around the clamping head 24, while a larger distance is formed between the separating head 2531 on the left side and the clamping head 24. At this point, the working position of the separating head 2531 has switched from the left side to the right side of the clamping head 24, completing the reversing action.

[0041] After the reversal is completed, the clamping head 24 rotates counterclockwise while moving horizontally to the left along with the sliding seat 21. At this time, the separating head 2531 on the right side is in close contact with the outer surface of the right circumference of the clamping head 24. During the process of the diaphragm being wound and folded, the tip of the separating head 2531 on the right side is inserted between the diaphragm and the electrode, thereby separating the electrode under the second diaphragm and preventing adhesion. At the same time, the glue tank 27 works again after the diaphragm is wound once, applying glue to the surface of the diaphragm that has flipped onto the clamping head 24, so that the second diaphragm is bonded and fixed to the first diaphragm.

[0042] As the clamping head 24 moves to the left, the ratchet 28 passes the pawls 281 located on the left side. Since there is no obstruction on the left side of the left pawl 281 (the limiting baffle 282 is located on its right), the pawl 281 is pushed to the left by the teeth at the bottom of the ratchet 28, compressing the torsion spring 283. The pawl 281 then rotates counterclockwise around the axis, allowing the ratchet 28 to pass smoothly. At this time, the separating head 2531 remains in the right position, continuing to separate the lower surface electrode sheet of the wound diaphragm. After the ratchet 28 has completely passed the left pawl 281, the left pawl 281 returns to its upright position under the action of the torsion spring 283.

[0043] Layer-by-layer cyclic disassembly of multi-layer diaphragms: After the clamping head 24 moves to the left end of the Z-shaped stacked battery and completes the winding of the second layer of separator, it is driven to rotate clockwise again, and the sliding seat 21 moves to the right. At this time, the pawl 281 located on the left side cannot swing clockwise due to the obstruction of the limiting baffle 282, and remains in an upright position, engaging with the teeth of the ratchet 28, driving the hinged swing arm 261 to swing clockwise around the axis of the ratchet 28. The hinged swing arm 261 switches from tilting to the upper left to tilting to the upper right, and the elongated groove 2611 drives the limiting block 2521 and the sliding frame 252 to move from the left side to the right side, and the working position of the separating head 2531 switches back from the right side to the left side.

[0044] This process is repeated continuously. The clamping head 24 moves back and forth on the truss 12. After each layer of diaphragm is wound, the hinged swing arm 261 is reversed via the ratchet 28 and pawl 281 mechanism, ensuring that the separating head 2531 always adheres to the outer surface of the clamping head 24 on the side of the new winding direction of the diaphragm, thus achieving continuous separation of the diaphragm and the electrode. At the same time, the glue tank 27 applies glue after each layer of diaphragm is wound once, so that each layer of diaphragm is bonded and fixed to form a regular roll. Throughout the disassembly process, the lifting platform 11 gradually rises as the diaphragm is peeled off layer by layer. The separation module 3 works in sync with the membrane pulling module 2. The connecting frame 31 and the sliding seat 21 slide horizontally along the truss 12 in sync. When the sliding seat 21 moves from left to right, the roller 32 on the left side assists in peeling off the positive electrode sheet on the left side. When the sliding seat 21 moves from right to left, the roller 32 on the right side assists in peeling off the negative electrode sheet on the right side. Alternatively, by opening air holes on the outer surface of the roller 32, the electrode sheet can be transferred by negative pressure or air nozzles, and the peeled electrode sheet can be moved into the receiving groove opened on the base 1.

[0045] Through the aforementioned layer-by-layer cyclic disassembly process, the separator in the Z-type stacked battery is completely peeled off layer by layer and wound into a regular roll, while the electrode sheets remain in place and are separated individually, achieving efficient separation and recycling of the separator and electrode sheets. The entire disassembly process is highly automated, requiring no manual intervention, effectively avoiding the problems of separator and electrode sheet adhesion and the simultaneous removal of multiple layers of separators, thus improving the recycling efficiency and purity of spent lithium iron phosphate battery packs.

[0046] After the continuous separator inside a single Z-shaped stacked battery is completely peeled off by the clamping head 24 and fully wound and stored around the outer circumference of the cylinder formed by the two semi-circular rods 241, the equipment enters the automatic membrane cutting process. At this time, the sliding seat 21 returns to the preset cutting position on the side of the cell, the clamping head 24 stops rotating, and maintains the clamped winding state, so that the opening and closing gap between the two semi-circular rods 241 is vertically aligned, forming a regular cutting guide slit. The cutting tool configured by the equipment feeds at a uniform speed along the radial gap between the two sets of semi-circular rods 241, and the cutting edge precisely cuts into the root position of the wound separator, moving laterally along the gap to cut the entire roll of separator. This cutting method can use the uniform gap formed by the opening and closing of the double semi-circular rods 241 as the cutting benchmark to ensure a flat cutting edge and avoid oblique cutting, tearing, and separator pulling.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A layer-by-layer dismantling device for Z-type diaphragm waste lithium iron phosphate battery packs, characterized in that, include: The base (1) has a lifting platform (11) for placing external Z-shaped stacked batteries embedded in the middle of the base (1), and a truss (12) is fixedly connected to the upper surface of the base (1). The membrane-pulling module (2) includes a sliding seat (21) that slides horizontally with the outer surface of the truss (12). A side plate (22) is fixedly connected to the lower surface of the sliding seat (21). A rotating seat (23) is rotatably connected inside the side plate (22). A clamping head (24) is slidably connected to the inner surface of the rotating seat (23). Two of the side plate (22) and the rotating seat (23) are provided and symmetrically distributed at both ends of the clamping head (24). An anti-sticking component (25) for separating the diaphragm and the electrode sheet is provided on the outer surface of the clamping head (24). The anti-stick component (25) includes an extension platform (251) disposed above the clamping head (24). The upper surface of the extension platform (251) is fixedly connected to the lower surface of the sliding seat (21). The extension platform (251) is slidably connected to a sliding frame (252) through a groove on its lower surface. A vertical plate (253) is fixed to the bottom end of the sliding frame (252).

2. The Z-type diaphragm waste lithium iron phosphate battery pack layer-by-layer dismantling equipment according to claim 1, characterized in that: It also includes a separation module (3), which includes a connecting frame (31) that slides horizontally on the outer surface of the truss (12), and a roller (32) is rotatably connected inside the connecting frame (31).

3. The Z-type diaphragm waste lithium iron phosphate battery pack layer-by-layer dismantling equipment according to claim 1, characterized in that: Two vertical plates (253) are provided. A separation head (2531) is integrally formed at the bottom end of the vertical plate (253). The separation head (2531) gradually narrows in thickness from top to bottom to form a pointed tip. A reversing component (26) is provided on the inner side of the side plate (22).

4. The Z-type diaphragm waste lithium iron phosphate battery pack layer-by-layer dismantling equipment according to claim 1, characterized in that: The clamping head (24) includes a semi-circular rod (241), and two semi-circular rods (241) are provided. The semi-circular rods (241) are slidably connected to the inner surface of the rotating seat (23) through a slider provided at its end.

5. The Z-type diaphragm waste lithium iron phosphate battery pack layer-by-layer dismantling equipment according to claim 3, characterized in that: The reversing component (26) includes a hinged swing arm (261) that is rotatably connected to the side plate (22) near the clamping head (24). The outer end of the hinged swing arm (261) is hinged to a connecting rod (262). The sliding frame (252) is fixedly connected to a limit block (2521) near the side plate (22). The hinged swing arm (261) has an elongated groove (2611) that fits against the outer surface of the limit block (2521).

6. The Z-type diaphragm waste lithium iron phosphate battery pack layer-by-layer dismantling equipment according to claim 5, characterized in that: A slide rail seat (263) is fixedly connected to the side of the side plate (22) near the clamping head (24). A sliding block (264) is slidably connected inside the slide rail seat (263). The bottom end of the sliding block (264) is hinged to the end of the connecting rod (262) away from the hinged swing arm (261). A spring (265) connected to the top of the inner wall of the slide rail seat (263) is provided on the upper surface of the sliding block (264).

7. The Z-type diaphragm waste lithium iron phosphate battery pack layer-by-layer dismantling equipment according to claim 6, characterized in that: The sliding frame (252) has a hollow design in the middle, and an adhesive tank (27) is provided above the clamping head (24). The upper surface of the adhesive tank (27) is fixedly installed at the bottom of the expansion platform (251).

8. The Z-type diaphragm waste lithium iron phosphate battery pack layer-by-layer dismantling equipment according to claim 6, characterized in that: The hinged swing arm (261) is fixedly connected to a ratchet (28) on the side away from the side plate (22). The upper surface of the base (1) is fixedly connected to a bracket (13). The bracket (13) is rotatably connected to a pawl (281) via a rotating shaft on its upper surface. Each bracket (13) is provided with two sets of pawls (281). The two sets of pawls (281) are distributed on both sides of the lifting platform (11). The side of the pawl (281) closest to the lifting platform (11) is provided with a limiting baffle (282) fixedly connected to the inside of the bracket (13). The outer circumference of the rotating shaft is fitted with a torsion spring (283) connected to the inside of the pawl (281).

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