Lithium battery cell recycling device and recycling method

Abstract

The application belongs to the technical field of lithium battery recycling, and particularly relates to a lithium battery cell recycling device and a recycling method, which comprise a rack, and a multi-station conveying module arranged on the rack. An upper feeding mechanism, a cell unfolding and slicing mechanism, a pole piece cutting mechanism and a lower discharging and stacking mechanism are sequentially arranged along the conveying direction of the multi-station conveying module. The lithium battery cell recycling device takes the multi-station continuous conveying module carried by the rack as a cell circulation carrier, sequentially conveys the cells to each mechanism for processing, realizes unfolding, slicing and stacking of the cells, and adopts a physical cutting mode to recycle the old cells, solves the problems of material mixing and low recycling rate in the existing crushing recycling mode of the old cells, significantly improves the recycling rate of the pole pieces, is high in environmental protection safety, and meets the green and low-carbon recycling trend.

Description

Technical Field

[0001] This invention belongs to the field of lithium battery recycling technology, and particularly relates to a lithium battery cell recycling device and recycling method. Background Technology

[0002] With the rapid expansion of the new energy vehicle and electrochemical energy storage industries, the installed capacity of lithium-ion batteries continues to climb. A large number of battery cells that have reached the end of their service life and are no longer in production are entering the recycling process. Battery cell recycling has become a core link in ensuring the stability of the lithium battery industry chain and implementing circular economy and dual-carbon goals. Currently, the industrialization process for lithium battery recycling typically uses crushing and shredding methods. In the pre-treatment stage, coarse crushing, fine crushing, and grinding are employed. The industry has not yet formed a complete, continuous, automated physical slicing and recycling equipment system, and there is no industrialized solution to directly produce finished electrode sheets through complete electrode sheet slicing. Existing crushing processes have many inherent defects that restrict high-value recycling. Summary of the Invention

[0003] The purpose of this invention is to provide a lithium battery cell recycling device and recycling method, aiming to solve the technical problem of low recycling efficiency of old battery cells in the prior art.

[0004] To achieve the above objectives, an embodiment of the present invention provides a lithium battery cell recycling device, including a frame and a multi-station conveying module disposed on the frame, wherein the following are arranged sequentially along the conveying direction of the multi-station conveying module:

[0005] The feeding mechanism is used to store used battery cells to be recycled;

[0006] A cell unfolding and slicing mechanism is used to unfold old cells and cut them into electrode sheets;

[0007] Electrode cutting mechanism is used to cut electrodes to a preset size;

[0008] The feeding and stacking mechanism is used to neatly stack the finished electrode sheets.

[0009] Optionally, the electrode cutting mechanism includes:

[0010] The longitudinal cutting mechanism is used to longitudinally cut the electrode sheet into a set length in one pass;

[0011] A rotary reversing mechanism is used to rotate the electrode to a preset angle and adjust the conveying direction of the electrode.

[0012] The transverse cutting mechanism is used to perform a second transverse cutting of the electrode sheet after it has been turned into an electrode sheet of a set width, thus completing the cutting of the finished electrode sheet.

[0013] Optionally, the longitudinal cutting mechanism includes a first longitudinal cutting unit, a second longitudinal cutting unit, and a first electrode carrier; the first longitudinal cutting unit and the second longitudinal cutting unit are respectively disposed on opposite sides of the first electrode carrier;

[0014] The rotary reversing mechanism includes a rotary unit and a second pole piece carrier; the rotary unit is connected to the second pole piece carrier and is used to drive the second pole piece carrier to rotate.

[0015] The transverse cutting mechanism includes a first transverse cutting unit, a second transverse cutting unit, and a third electrode carrier; the first transverse cutting unit and the second transverse cutting unit are respectively disposed on opposite sides of the third electrode carrier;

[0016] The centers of the first electrode carrier, the second electrode carrier, and the third electrode carrier are located on the same straight line.

[0017] Optionally, an electrode transfer device is provided between the transverse cutting mechanism and the material stacking mechanism, and a limiting mechanism is installed on the outer side of the electrode transfer device; the centers of the first electrode carrier, the second electrode carrier, the third electrode carrier and the electrode transfer device are arranged on the same straight line.

[0018] Optionally, the first longitudinal cutting unit includes a first longitudinal base, a first longitudinal slide, a first longitudinal die-cutting blade, and a first longitudinal drive unit; the first longitudinal slide is movably disposed on the upper side of the first longitudinal base, the first longitudinal die-cutting blade is mounted on the first longitudinal slide, the first longitudinal die-cutting blade is movably connected to a first longitudinal pressing block on the side facing the first electrode carrier, the first longitudinal base is provided with a clearance groove for accommodating the first longitudinal die-cutting blade, the inner side of the clearance groove is provided with a first longitudinal boss adapted to the first longitudinal pressing block, and the first longitudinal drive unit is tractively connected to the first longitudinal slide and is used to drive the first longitudinal slide to move up and down.

[0019] Optionally, the first transverse cutting unit includes a first transverse cutting base, a first transverse cutting slide, a first transverse die-cutting blade, and a first transverse driving unit; the first transverse cutting base is fixed to the frame, the first transverse cutting slide is slidably connected to the side of the first transverse cutting base facing the third electrode carrier, the first transverse die-cutting blade is mounted on the first transverse cutting slide, and the first transverse driving unit is pulsatorically connected to the first transverse cutting slide and is used to drive the first transverse cutting slide to move up and down.

[0020] Optionally, the cell unfolding and slicing mechanism includes a cell reversal unit and two sets of electrode strip cutting mechanisms; the two sets of electrode strip cutting mechanisms are respectively located on both sides of the cell reversal unit, and an electrode storage mechanism is provided on the side of the electrode strip cutting mechanism away from the cell reversal unit. A guide roller assembly is provided between the cell reversal unit and the electrode strip cutting mechanism for transmitting the electrode strip.

[0021] Optionally, the electrode strip cutting mechanism includes a cutting base, a pressure roller assembly, an electrode cutter, and a cutter drive cylinder. The cutting base has a platform in the middle for the electrode strip to pass through. The pressure roller assembly is located on the side of the cutting base facing the cell reversal unit. The pressure roller assembly includes a lower pressure roller, an upper pressure roller, a pressure roller slider, and a pressure roller cylinder. The lower pressure roller is rotatably connected to the cutting base, and its outer surface is evenly distributed with multiple anti-slip protrusions. The upper pressure roller is located above the lower pressure roller and is rotatably mounted on the pressure roller slider. The pressure roller slider is slidably connected to the cutting base. The telescopic end of the pressure roller cylinder is connected to the pressure roller slider and used to drive the pressure roller slider to slide. The electrode cutter is slidably located on the side of the cutting base away from the cell reversal unit. The telescopic end of the cutter drive cylinder is connected to the electrode cutter and used to drive the electrode cutter to move up and down.

[0022] Optionally, a laser cleaning mechanism for laser cleaning the front and back sides of the electrode tabs is provided between the feeding and stacking mechanism and the electrode cutting mechanism.

[0023] The lithium battery cell recycling device provided in this invention has at least one of the following technical effects: The lithium battery cell recycling device relies on a multi-station continuous conveying module mounted on a frame as a cell transfer carrier to sequentially transport the cells to various mechanisms for processing, thereby realizing the sequential unfolding, slicing and stacking of the cells. The lithium battery cell recycling device provided by this invention uses a physical cutting method to recycle old cells, solving the problems of material mixing and low recycling rate in existing crushing and recycling methods, significantly improving the recycling rate of electrode sheets, and is environmentally friendly and safe, in line with the trend of green and low-carbon recycling.

[0024] This invention also provides a method for recycling lithium battery cells, comprising the following steps:

[0025] Step S001: The multi-station conveying module conveys the waste battery cells to be recycled to the battery cell unfolding and slicing mechanism;

[0026] Step S002: The cell unfolding and slicing mechanism clamps the center winding needle of the wound cell and rotates the wound cell at a constant speed, so that the wound cell unfolds into a continuous electrode strip, and cuts the electrode strip into multiple electrode sheets;

[0027] Step S003: The multi-station conveying module conveys the electrode strip to the longitudinal cutting mechanism, performs longitudinal cutting according to the set length, trims the electrode edges, and cuts them into electrodes of equal length;

[0028] Step S004: The multi-station conveying module conveys the electrode sheets of equal width to the rotary reversing mechanism. The rotary reversing mechanism attracts the electrode sheets and rotates 90° to adjust the conveying direction.

[0029] Step S005: The multi-station conveying module conveys the electrode sheets of equal length to the transverse cutting mechanism. The transverse cutting mechanism performs transverse cutting according to the set width to obtain the finished electrode sheets of the preset size.

[0030] Step S006: The multi-station conveying module conveys the finished electrode sheets to the unloading and stacking unit, where they are neatly stacked in the hopper. Once the set number is reached, a batch of electrode sheets is recycled.

[0031] The lithium battery cell recycling method provided in this invention has at least one of the following technical effects: The lithium battery cell recycling device relies on a multi-station continuous conveying module mounted on a frame as a cell transfer carrier to sequentially transport the cells to various mechanisms for processing, thereby realizing the sequential unfolding, slicing and stacking of the cells. The lithium battery cell recycling device provided by this invention uses a physical cutting method to recycle old cells, solving the problems of material mixing and low recycling rate in existing crushing and recycling methods, significantly improving the recycling rate of electrode sheets, and is environmentally friendly and safe, in line with the trend of green and low-carbon recycling. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the electrode cutting mechanism provided in an embodiment of the present invention.

[0034] Figure 2 This is a top view of the electrode cutting mechanism provided in an embodiment of the present invention.

[0035] Figure 3 This is a schematic diagram of the longitudinal cutting mechanism provided in an embodiment of the present invention.

[0036] Figure 4 This is a schematic diagram of the structure of the first longitudinal cutting unit provided in an embodiment of the present invention.

[0037] Figure 5This is a schematic diagram of the structure of the first longitudinal die-cutting blade provided in an embodiment of the present invention.

[0038] Figure 6 This is a schematic diagram of the rotary reversing mechanism provided in an embodiment of the present invention.

[0039] Figure 7 This is a schematic diagram of the transverse cutting mechanism provided in an embodiment of the present invention.

[0040] Figure 8 This is a schematic diagram of the structure of the first transverse cutting unit provided in an embodiment of the present invention.

[0041] Figure 9 This is a schematic diagram of the structure of the laser cleaning mechanism provided in an embodiment of the present invention.

[0042] Figure 10 This is a schematic diagram of the structure of the first cleaning base provided in an embodiment of the present invention.

[0043] Figure 11 This is a schematic diagram of the structure of the cell unfolding and slicing mechanism provided in an embodiment of the present invention.

[0044] Figure 12 This is a schematic diagram of the structure of the cell reversal unit provided in an embodiment of the present invention.

[0045] Figure 13 This is a schematic diagram of the electrode strip cutting mechanism provided in an embodiment of the present invention.

[0046] Figure 14 This is a schematic diagram of the electrode strip cutting mechanism provided in an embodiment of the present invention.

[0047] The following are the labeling elements in the figure:

[0048] 100—Cell unfolding and slicing mechanism; 101—Cell reversing unit; 102—Electrode strip cutting mechanism; 103—Cutting base; 104—Pressure roller assembly; 105—Electrode cutter; 106—Cutter drive cylinder; 107—Lower pressure roller; 108—Upper pressure roller; 109—Pressure roller slider; 110—Pressure roller cylinder; 111—Anti-slip protrusions; 112—Platform; 103—Reversing base; 104—Reversing drive motor; 105—Cell clamp; 106—Finger cylinder; 107—First clamping plate; 108—Second clamping plate;

[0049] 200—Electrode cutting mechanism;

[0050] 300—Longitudinal cutting mechanism; 301—First longitudinal cutting unit; 302—Second longitudinal cutting unit; 303—First electrode carrier; 304—First longitudinal base; 305—First longitudinal slide; 306—First longitudinal die-cutting blade; 307—First longitudinal drive unit; 308—First longitudinal pressing block; 309—Void groove; 310—First longitudinal boss;

[0051] 400—Rotary reversing mechanism; 401—Rotary unit; 402—Second pole plate carrier;

[0052] 500—Transverse cutting mechanism; 501—First transverse cutting unit; 502—Second transverse cutting unit; 503—Third electrode carrier; 504—First transverse cutting base; 505—First transverse cutting slide; 506—First transverse die-cutting blade; 507—First transverse drive unit; 600—Material unloading and stacking mechanism; 700—Electrode carrier; 701—Limiting mechanism;

[0053] 800—Laser cleaning mechanism; 801—First cleaning base; 802—Second cleaning base; 803—Reverse laser; 804—Front laser; 805—Laser cleaning machine; 806—Cleaning tank. Detailed Implementation

[0054] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain embodiments of the present invention, and should not be construed as limiting the present invention.

[0055] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0057] In the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0058] In one embodiment of the present invention, such as Figures 1-14 As shown, a lithium battery cell recycling device is provided, including a frame and a multi-station conveying module mounted on the frame. Along the conveying direction of the multi-station conveying module, a feeding mechanism, a cell unfolding and slicing mechanism 100, an electrode cutting mechanism 200, and a unloading and stacking mechanism 600 are arranged sequentially. The feeding mechanism is used to store used cells to be recycled.

[0059] The cell unfolding and slicing mechanism 100 is used to unfold and cut old cells to form electrode sheets.

[0060] Among them, the electrode cutting mechanism 200 is used to cut the electrode into a preset size.

[0061] The feeding and stacking mechanism 600 is used to neatly stack the finished electrode sheets.

[0062] In this embodiment of the invention, the lithium battery cell recycling device relies on a multi-station continuous conveying module mounted on a frame as a cell transfer carrier to sequentially transport the cells to various mechanisms for processing, thereby realizing the sequential unfolding, slicing, and stacking of the cells. The lithium battery cell recycling device provided by this invention uses a physical cutting method to recycle old cells, solving the problems of material mixing and low recycling rate in existing crushing and recycling methods, significantly improving the recycling rate of electrode sheets, and is highly environmentally friendly and safe, in line with the trend of green and low-carbon recycling.

[0063] In another embodiment of the present invention, the electrode cutting mechanism 200 of the lithium battery cell recycling device includes a longitudinal cutting mechanism 300, a rotation reversing mechanism 400, and a transverse cutting mechanism 500.

[0064] The longitudinal cutting mechanism 300 is used to longitudinally cut the electrode sheet into a set length in a single operation. The rotation and reversing mechanism 400 is used to rotate the electrode sheet to a preset angle and adjust the conveying direction of the electrode sheet. The transverse cutting mechanism 500 is used to transversely cut the rotated electrode sheet into a set width in a second operation, thus completing the cutting of the finished electrode sheet.

[0065] In this embodiment, the electrode cutting mechanism 200, through the segmented cooperation of the longitudinal cutting mechanism 300, the rotation and reversing mechanism 400, and the transverse cutting mechanism 500, achieves secondary precise cutting of the electrode sheet with fixed longitudinal length and fixed transverse width. This enables the electrode sheet to be processed into finished electrode sheets of a preset size, resulting in high cutting accuracy and good dimensional consistency. The addition of the rotation and reversing mechanism 400 enables automatic adjustment of the electrode sheet conveying direction, allowing the longitudinal and transverse cutting to be completed sequentially on a straight conveying path. This results in a compact structure, small footprint, and smooth electrode sheet conveying. Furthermore, by adjusting the longitudinal cutting length and transverse cutting width separately, it can flexibly adapt to the requirements of different specifications of recycled electrode sheets, making the device highly versatile and widely applicable.

[0066] In another embodiment of the invention, such as Figures 3-5 As shown, the longitudinal cutting mechanism 300 of the lithium battery cell recycling device includes a first longitudinal cutting unit 301, a second longitudinal cutting unit 302, and a first electrode carrier 303; the first longitudinal cutting unit 301 and the second longitudinal cutting unit 302 are respectively disposed on opposite sides of the first electrode carrier 303; the rotation reversing mechanism 400 includes a rotating unit 401 and a second electrode carrier 402; the rotating unit 401 is tractively connected to the second electrode carrier 402 and is used to drive the second electrode carrier 402 to rotate; the transverse cutting mechanism 500 includes a first transverse cutting unit 501, a second transverse cutting unit 502, and a third electrode carrier 503; the first transverse cutting unit 501 and the second transverse cutting unit 502 are respectively disposed on opposite sides of the third electrode carrier 503; wherein the centers of the first electrode carrier 303, the second electrode carrier 402, and the third electrode carrier 503 are located on the same straight line. In this embodiment, the longitudinal cutting mechanism 300 is configured as a bilaterally symmetrical structure consisting of a first longitudinal cutting unit 301, a second longitudinal cutting unit 302, and a first electrode carrier 303. The transverse cutting mechanism 500 is configured as a bilaterally symmetrical structure consisting of a first transverse cutting unit 501, a second transverse cutting unit 502, and a third electrode carrier 503. This is further enhanced by a rotation reversing mechanism 400 composed of a rotating unit 401 and a second electrode carrier 402. Simultaneously, the first electrode carrier 303, the second electrode carrier 402, and the third electrode carrier... The 503's center is located on the same straight line, which ensures that the electrode maintains consistent center positioning and a straight conveying path throughout the entire process of longitudinal cutting, rotation reversal, and transverse cutting. The unified positioning reference effectively avoids problems such as electrode offset during cutting and turning, significantly improving electrode cutting accuracy and finished product quality. Simultaneous cutting on both sides ensures uniform force on the electrode, making cutting more stable and neat. The coaxial layout of each carrier also makes the overall structure more compact and the operation more stable, which is conducive to realizing automated continuous operation and improving the working efficiency and reliability of the recycling device.

[0067] In another embodiment of the invention, such as Figures 1-2 As shown, an electrode transfer device 700 is provided between the transverse cutting mechanism 500 and the unloading and stacking mechanism 600 of the lithium battery cell recycling device. A limiting mechanism 701 is installed on the outer side of the electrode transfer device 700. The centers of the first electrode carrier 303, the second electrode carrier 402, the third electrode carrier 503 and the electrode transfer device 700 are located on the same straight line. In this embodiment, an electrode transfer device 700 is added between the transverse cutting mechanism 500 and the unloading and stacking mechanism 600. A limiting mechanism 701 is fitted on the outside of the electrode transfer device 700. Simultaneously, the centers of the first electrode carrier 303, the second electrode carrier 402, the third electrode carrier 503, and the electrode transfer device 700 are collinear. This serves two purposes: firstly, it provides intermediate support for the finished electrode sheets after transverse cutting; secondly, the outer limiting mechanism 701 constrains the electrode sheet position from all sides, correcting any offset after cutting and ensuring the electrode sheets are in a regular posture before being fed into the unloading and stacking mechanism 600. All carriers along the entire line maintain the same straight line, unifying the positioning benchmark for the entire process. This allows the electrode sheets to travel in a straight line from longitudinal cutting, rotational reversal, transverse cutting to intermediate transport, without path deviation. This further improves the stability of electrode sheet transport, ensures high alignment of the electrode sheets during unloading and stacking, and improves the appearance quality of the finished electrode sheets.

[0068] In another embodiment of the invention, such as Figure 4As shown, the first longitudinal cutting unit 301 of the lithium battery cell recycling device includes a first longitudinal base 304, a first longitudinal slide 305, a first longitudinal die-cutting blade 306, and a first longitudinal drive unit 307. The first longitudinal slide 305 is movably disposed on the upper side of the first longitudinal base 304. The first longitudinal die-cutting blade 306 is mounted on the first longitudinal slide 305. The first longitudinal die-cutting blade 306 is movably connected to a first longitudinal pressing block 308 on the side facing the first electrode carrier 303. The first longitudinal base 304 is provided with a clearance groove 309 for accommodating the first longitudinal die-cutting blade 306. The inner side of the clearance groove 309 is provided with a first longitudinal boss 310 adapted to the first longitudinal pressing block 308. The first longitudinal drive unit 307 is connected to the first longitudinal slide 305 and is used to drive the first longitudinal slide 305 to move up and down. In this embodiment, the first longitudinal cutting unit 301 adopts a matching structure of base, slide, die-cutting blade, drive unit, longitudinal pressure block, clearance groove 309 and longitudinal boss. When the first longitudinal drive unit 307 drives the first longitudinal slide 305 and the first longitudinal die-cutting blade 306 to move downward as a whole, the first longitudinal pressure block 308 will first contact the electrode and cooperate with the first longitudinal boss 310 on the base to press and fix the electrode in advance to prevent the electrode from slipping or wrinkling during the cutting process. Then the first longitudinal die-cutting blade 306 continues to move downward and extends into the clearance groove 309 to complete the die cutting. The clearance groove 309 can provide clearance space for the die-cutting blade to avoid the blade from hitting the base and causing chipping and wear, thus extending the service life of the blade. The entire structure presses first and then cuts, resulting in uniform cutting force, smooth cuts without burrs, and less likelihood of electrode powder shedding or delamination. This significantly improves the accuracy of longitudinal cutting dimensions and the yield of finished products. At the same time, the sliding assembly of the slide and the base is simple, making it easy to disassemble, inspect, and replace the die-cutting blade, thus reducing the difficulty of equipment operation and maintenance.

[0069] In another embodiment of the invention, such as Figures 7-8As shown, the first transverse cutting unit 501 of the lithium battery cell recycling device includes a first transverse cutting base 504, a first transverse cutting slide 505, a first transverse die-cutting blade 506, and a first transverse driving unit 507. The first transverse cutting base 504 is fixed on the frame, the first transverse cutting slide 505 is slidably connected to the side of the first transverse cutting base 504 facing the third electrode carrier 503, the first transverse die-cutting blade 506 is mounted on the first transverse cutting slide 505, and the first transverse driving unit 507 is connected to the first transverse cutting slide 505 and is used to drive the first transverse cutting slide 505 to move up and down. In this embodiment, the first transverse cutting unit 501 is fixedly installed on the frame via the first transverse cutting base 504, ensuring a firm overall installation and preventing overall shaking during cutting operations, thus guaranteeing a stable cutting benchmark. The first transverse cutting slide 505 slides in conjunction with the base, and the first transverse driving unit 507 drives the slide and the first transverse die-cutting blade 506 to reciprocate as a whole. The sliding guide structure restricts the movement trajectory of the die-cutting blade, ensuring high linearity and smooth, non-deviation-free operation, thus guaranteeing the dimensional accuracy of transverse cutting. The die-cutting blade is integrated on the slide, making it easy to disassemble and replace, facilitating blade replacement according to different electrode width requirements, and adapting to various recycling specifications. The overall modular integrated structure has a simple layout, clear transmission logic, low failure rate, and can stably complete transverse fixed-width cutting of electrode sheets, producing uniform and neat cuts, thus improving the consistency of finished electrode sheets.

[0070] In another embodiment of the invention, such as Figures 11-14As shown, the cell unfolding and slicing mechanism 100 of the lithium battery cell recycling device includes a cell reversal unit 101 and two sets of electrode strip cutting mechanisms 102. The two sets of electrode strip cutting mechanisms 102 are respectively arranged on both sides of the cell reversal unit 101. An electrode storage mechanism is provided on the side of the electrode strip cutting mechanism 102 away from the cell reversal unit 101. A guide roller assembly is provided between the cell reversal unit 101 and the electrode strip cutting mechanism 102 for conveying the electrode strip. In this embodiment, the cell unfolding and slicing mechanism 100 adopts a cell reversal unit 101 paired with two sets of electrode strip cutting mechanisms 102 symmetrically arranged on both sides. When the cell reversal unit 101 rotates to release the wound cell, it can synchronously output continuous electrode strips to both sides, and the cutting operations are carried out at both workstations at the same time, which greatly improves the efficiency of cell dismantling and processing. A guide roller assembly is set between the cell reversal unit 101 and the electrode strip cutting mechanism 102, which can support, limit and guide the unfolded electrode strip, avoid deviation during the electrode strip transportation process, and ensure the integrity of the electrode strip transportation shape. An electrode storage mechanism is set on the outside of the electrode strip cutting mechanism 102, which can temporarily receive and store the cut electrode strips, realize the orderly temporary storage of electrode strips, avoid the electrode strips being scattered and piled up, and facilitate the continuous material retrieval and processing of subsequent processes. The symmetrical layout structure with synchronous operation on both sides has high space utilization, balanced operating load, low equipment vibration and strong stability, and can be adapted to the continuous dismantling and recycling of large-capacity power-wound cells.

[0071] Specifically, the cell reversal unit 101 includes a reversal base 103, a reversal drive motor 104, and a cell clamp 105. The cell clamp 105 is used to clamp the old cell and is rotatably connected to the reversal base 103. The reversal drive motor 104 is connected to the cell clamp 105 and is used to drive the cell clamp 105 to rotate. Further, the cell clamp 105 includes a finger cylinder 106, a first clamping plate 107, and a second clamping plate 108. The two movable ends of the finger cylinder 106 are respectively connected to the first clamping plate 107 and the second clamping plate 108 and are used to drive the first clamping plate 107 and the second clamping plate 108 to move towards each other or away from each other. The first clamping plate 107 and the second clamping plate 108 are each provided with a scale for measuring the size of the cell.

[0072] In another embodiment of the invention, such as Figures 13-14As shown, the electrode strip cutting mechanism 102 of the lithium battery cell recycling device includes a cutting base 103, a pressure roller assembly 104, an electrode cutter 105, and a cutter drive cylinder 106. The cutting base 103 has a platform 112 in the middle for the electrode strip to pass through. The pressure roller assembly 104 is located on the side of the cutting base 103 facing the cell reversing unit 101. The pressure roller assembly 104 includes a lower pressure roller 107, an upper pressure roller 108, a pressure roller slider 109, and a pressure roller cylinder 110. The lower pressure roller 107 is rotatably connected to the cutting base 103, and multiple electrodes are evenly distributed on its outer surface. Anti-slip protrusions 111; the upper pressure roller 108 is located above the lower pressure roller 107; the upper pressure roller 108 is rotatably mounted on the pressure roller slider 109; the pressure roller slider 109 is slidably connected to the cutting base 103; the telescopic end of the pressure roller cylinder 110 is connected to the pressure roller slider 109 and is used to drive the pressure roller slider 109 to slide; the electrode cutter 105 is slidably located on the side of the cutting base 103 away from the cell reversal unit 101; the telescopic end of the cutter drive cylinder 106 is connected to the electrode cutter 105 and is used to drive the electrode cutter 105 to move up and down. In this embodiment, the electrode strip cutting mechanism 102 uses a cutting base 103 as the main support. A dedicated platform 112 is set in the middle of the base for the electrode strip to pass through, providing stable support for conveying. On the feeding side, a pressure roller assembly 104 is configured, consisting of a lower pressure roller 107, an upper pressure roller 108, a pressure roller slider 109, and a pressure roller cylinder 110. Anti-slip protrusions 111 are provided on the surface of the lower pressure roller 107. The pressure roller cylinder 110 drives the upper pressure roller 108 to press down, which can tightly clamp the electrode strip between the upper and lower pressure rollers 107. The anti-slip protrusions 111 increase the friction force, effectively preventing the electrode strip from slipping during the conveying process. The electrode strip slippage, offset, and stretching deformation provide a stable positioning reference for cutting. The cutting station uses a cutter drive cylinder 106 to drive the electrode cutter 105 to reciprocate up and down for cutting. The cutting action is responsive and has low impact. Combined with the pre-fixing effect of the front pressure roller assembly 104, the electrode strip will not shift during cutting, and the cut is flat. The overall structure is driven by a cylinder, which is low-cost and easy to maintain. The pressure roller and cutter are arranged in separate sections, and the feeding and cutting processes do not interfere with each other. The electrode strip cutting operation can be completed continuously and stably, improving the electrode forming quality and the stability of continuous operation of the equipment.

[0073] In another embodiment of the invention, such as Figures 9-10As shown, a laser cleaning mechanism 800 for laser cleaning the front and back sides of the electrode tabs is provided between the feeding and stacking mechanism 600 and the electrode cutting mechanism 200 of the lithium battery cell recycling device. In this embodiment, the addition of the laser cleaning mechanism 800 between the feeding and stacking mechanism 600 and the electrode cutting mechanism 200 can remove residual debris, adhesive residue, and powder impurities from the electrode tabs, significantly improving the cleanliness of the recycled electrode. The cleaned electrode is free of impurities, improving the quality of the finished electrode, while reducing the impurity removal costs of subsequent processes and improving the stability of the recycling process.

[0074] Specifically, the laser cleaning mechanism 800 includes a first cleaning base 801, a second cleaning base 802, a reverse laser 803, a front laser 804, and a pressing mechanism 805. The first cleaning base 801 and the second cleaning base 802 are spaced apart along the conveying direction of the multi-station conveying module. The first cleaning base 801 is provided with a worktable for placing electrode sheets. Multiple air holes are evenly distributed on the surface of the worktable. A long strip-shaped cleaning groove 806 is carved into the surface of the worktable near the side. The cleaning groove 806 is connected to the bottom surface of the worktable. When the electrode sheet is placed on the worktable, the electrode tabs of the electrode sheet are positioned in the cleaning groove 806. The reverse laser 803 is located on the bottom surface of the worktable and is used to clean the electrode tabs of the electrode sheet placed in the cleaning groove 806. The pressing mechanism 805 is located on the upper side of the cleaning groove 806 and is used to position the electrode tabs of the electrode sheet. When the electrode tabs of the electrode sheet are positioned in the cleaning groove 806, the reverse laser 803 cleans the electrode tabs of the electrode sheet. The second cleaning base 802 is provided with a cleaning area for placing the electrode sheet, and the front laser 804 is located on the upper side of the cleaning area for cleaning the front of the electrode tab of the electrode sheet.

[0075] This invention also provides a method for recycling lithium battery cells, comprising the following steps:

[0076] Step S001: The multi-station conveying module conveys the waste wound battery cells to be recycled to the battery cell unfolding and slicing mechanism 100;

[0077] Step S002: The cell unfolding and slicing mechanism 100 clamps the center winding needle of the wound cell and rotates the wound cell at a constant speed, so that the wound cell unfolds into a continuous electrode strip and cuts the electrode strip into multiple electrode sheets;

[0078] Step S003: The multi-station conveying module conveys the electrode strip to the longitudinal cutting mechanism 300, performs longitudinal cutting according to the set length, trims the electrode edge, and cuts it into electrodes of equal length.

[0079] Step S004: The multi-station conveying module conveys the electrode sheets of equal width to the rotary reversing mechanism 400. The rotary reversing mechanism 400 attracts the electrode sheets and rotates 90° to adjust the conveying direction.

[0080] Step S005: The multi-station conveying module conveys the electrode sheets of equal length to the transverse cutting mechanism 500. The transverse cutting mechanism 500 performs transverse cutting according to the set width to obtain the finished electrode sheets of the preset size.

[0081] Step S006: The multi-station conveying module conveys the finished electrode sheets to the unloading and stacking unit, where they are neatly stacked in the hopper. Once the set number is reached, a batch of electrode sheets is recycled.

[0082] In this embodiment of the invention, the lithium battery cell recycling method provided by the present invention relies on a multi-station conveying module to achieve continuous flow throughout the entire process. The process is tightly connected and seamless, eliminating the need for manual transfer of cells and electrodes. It has a high degree of automation and can realize large-scale continuous recycling of waste wound cells. First, the cell is held in the center and rotated at a constant speed to unfold a complete continuous electrode strip. Then, it is cut into individual electrode pieces. Unlike the traditional crushing and pulverizing process, the complete electrode substrate is preserved throughout the process. The step-by-step processing logic of longitudinal fixed-length cutting, 90° rotation reversal, and transverse fixed-width cutting can control the length and width of the electrode pieces, outputting standard finished electrode pieces with uniform specifications and neat edges, which are convenient for direct use in electrode remanufacturing or purification and recycling. The rotation reversal station individually adsorbs and carries the electrode pieces to complete the reversal. The electrode pieces are positioned stably during the cutting process, ensuring cutting accuracy. Finally, the finished electrode pieces are automatically and neatly stacked and counted for discharge. The materials are neatly stacked, which is convenient for batch transfer and storage. The entire process has a reasonable process logic and stable operation, which significantly reduces labor costs and improves the efficiency of cell recycling.

[0083] In this embodiment of the invention, step S006 further includes the multi-station conveying module conveying the finished electrode sheet to the unloading and stacking unit, and then conveying the electrode sheet to the laser cleaning mechanism 800 for cleaning. This process removes residual debris, adhesive residue, and powder impurities from both sides of the electrode tab, significantly improving the cleanliness of the recycled electrode sheet; the cleaned electrode sheet is free of impurities, improving the quality of the finished electrode sheet.

[0084] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A lithium battery cell recycling device, characterized in that, The device includes a frame and a multi-station conveying module mounted on the frame. Along the conveying direction of the multi-station conveying module, the following components are arranged in sequence: a feeding mechanism for storing used battery cells to be recycled; and a battery cell unfolding and slicing mechanism for unfolding and cutting the used battery cells to form electrode sheets. The electrode cutting mechanism is used to cut the electrode sheets to a preset size; the material stacking mechanism is used to neatly stack the finished electrode sheets.

2. The lithium battery cell recycling device according to claim 1, characterized in that: The electrode cutting mechanism includes: The longitudinal cutting mechanism is used to cut the electrode sheet longitudinally into a set length in one pass; the rotation and reversing mechanism is used to rotate the electrode sheet to a preset angle and adjust the conveying direction of the electrode sheet; the transverse cutting mechanism is used to cut the electrode sheet transversely into a set width in a second pass after the reversal, thus completing the cutting of the finished electrode sheet.

3. The lithium battery cell recycling device according to claim 2, characterized in that: The longitudinal cutting mechanism includes a first longitudinal cutting unit, a second longitudinal cutting unit, and a first electrode carrier; the first longitudinal cutting unit and the second longitudinal cutting unit are respectively disposed on opposite sides of the first electrode carrier; The rotary reversing mechanism includes a rotary unit and a second pole piece carrier; the rotary unit is connected to the second pole piece carrier and is used to drive the second pole piece carrier to rotate. The transverse cutting mechanism includes a first transverse cutting unit, a second transverse cutting unit, and a third electrode carrier; The first transverse cutting unit and the second transverse cutting unit are respectively disposed on opposite sides of the third electrode carrier; The centers of the first electrode carrier, the second electrode carrier, and the third electrode carrier are located on the same straight line.

4. The lithium battery cell recycling device according to claim 3, characterized in that, A electrode transfer device is provided between the transverse cutting mechanism and the material stacking mechanism, and a limiting mechanism is installed on the outside of the electrode transfer device; the centers of the first electrode carrier, the second electrode carrier, the third electrode carrier and the electrode transfer device are arranged on the same straight line.

5. The lithium battery cell recycling device according to claim 3, characterized in that, The first longitudinal cutting unit includes a first longitudinal base, a first longitudinal slide, a first longitudinal die-cutting blade, and a first longitudinal drive unit. The first longitudinal slide is movably disposed on the upper side of the first longitudinal base. The first longitudinal die-cutting blade is mounted on the first longitudinal slide. A first longitudinal pressing block is movably connected to the side of the first longitudinal die-cutting blade facing the first electrode carrier. The first longitudinal base is provided with a clearance groove for accommodating the first longitudinal die-cutting blade. The inner side of the clearance groove is provided with a first longitudinal boss that is adapted to the first longitudinal pressing block. The first longitudinal drive unit is tractively connected to the first longitudinal slide and is used to drive the first longitudinal slide to move up and down.

6. The lithium battery cell recycling device according to claim 3, characterized in that, The first transverse cutting unit includes a first transverse cutting base, a first transverse cutting slide, a first transverse die-cutting blade, and a first transverse driving unit. The first transverse cutting base is fixed to the frame, the first transverse cutting slide is slidably connected to the side of the first transverse cutting base facing the third electrode carrier, the first transverse die-cutting blade is mounted on the first transverse cutting slide, and the first transverse driving unit is drivenly connected to the first transverse cutting slide and is used to drive the first transverse cutting slide to move up and down.

7. The lithium battery cell recycling device according to any one of claims 1 to 6, characterized in that, The cell unfolding and slicing mechanism includes a cell reversal unit and two sets of electrode strip cutting mechanisms; the two sets of electrode strip cutting mechanisms are respectively located on both sides of the cell reversal unit, and an electrode storage mechanism is provided on the side of the electrode strip cutting mechanism away from the cell reversal unit. A guide roller assembly is provided between the cell reversal unit and the electrode strip cutting mechanism for transmitting the electrode strip.

8. The lithium battery cell recycling device according to claim 7, characterized in that, The electrode strip cutting mechanism includes a cutting base, a pressure roller assembly, an electrode cutter, and a cutter drive cylinder. The cutting base has a platform in the middle for the electrode strip to pass through. The pressure roller assembly is located on the side of the cutting base facing the cell reversal unit. The pressure roller assembly includes a lower pressure roller, an upper pressure roller, a pressure roller slider, and a pressure roller cylinder. The lower pressure roller is rotatably connected to the cutting base, and its outer surface is evenly covered with multiple anti-slip protrusions. The upper pressure roller is located above the lower pressure roller and is rotatably mounted on the pressure roller slider. The pressure roller slider is slidably connected to the cutting base. The telescopic end of the pressure roller cylinder is connected to the pressure roller slider and used to drive the pressure roller slider to slide. The electrode cutter is slidably disposed on the side of the cutting base away from the cell reversal unit. The extension and retraction end of the cutter drive cylinder is connected to the electrode cutter and is used to drive the electrode cutter to move up and down.

9. The lithium battery cell recycling device according to any one of claims 1 to 6, characterized in that, A laser cleaning mechanism is provided between the feeding and stacking mechanism and the electrode cutting mechanism for laser cleaning the front and back sides of the electrode tabs.

10. A method for recycling lithium battery cells, characterized in that, Includes the following steps: Step S001: The multi-station conveying module conveys the waste battery cells to be recycled to the battery cell unfolding and slicing mechanism; Step S002: The cell unfolding and slicing mechanism clamps the center winding needle of the wound cell and rotates the wound cell at a constant speed, so that the wound cell unfolds into a continuous electrode strip, and cuts the electrode strip into multiple electrode sheets; Step S003: The multi-station conveying module conveys the electrode strip to the longitudinal cutting mechanism, performs longitudinal cutting according to the set length, trims the electrode edges, and cuts them into electrodes of equal length; Step S004: The multi-station conveying module conveys the electrode sheets of equal width to the rotary reversing mechanism. The rotary reversing mechanism attracts the electrode sheets and rotates 90° to adjust the conveying direction. Step S005: The multi-station conveying module conveys the electrode sheets of equal length to the transverse cutting mechanism. The transverse cutting mechanism performs transverse cutting according to the set width to obtain the finished electrode sheets of the preset size. Step S006: The multi-station conveying module conveys the finished electrode sheets to the unloading and stacking unit, where they are neatly stacked in the hopper. Once the set number is reached, a batch of electrode sheets is recycled.

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