Waste pole piece active material recovery device

Abstract

The utility model discloses a waste pole piece active material recovery device, and relates to the technical field of battery material recovery, the waste pole piece active material recovery device comprises a box body, a solvent accommodating box, a heating mechanism, a wrinkle generation mechanism and a winding mechanism, the solvent accommodating box is arranged in the box body, and a solvent is stored in the solvent accommodating box; the heating mechanism is mounted in the box body and is used for heating the pole piece passing through the heating mechanism; the wrinkle generation mechanism is mounted in the box body and is positioned below the solvent accommodating box and the heating mechanism; the pole piece deforms when passing through the wrinkle generation mechanism, and an active material in the wrinkle generation mechanism is separated from the pole piece; the winding mechanism is mounted in the box body and drives the pole piece to sequentially pass through the solvent accommodating box, the heating mechanism and the wrinkle generating mechanism. The device can improve the recovery rate of active materials.

Description

Technical Field

[0001] The utility model relates to the technical field of battery material recycling, in particular to a device for recycling active materials of waste pole pieces. Background Art

[0002] With the growth of demand for new energy vehicles, the output of rechargeable lithium-ion batteries is increasing year by year. However, due to technical problems that are inevitable in the operation of industrial equipment, such as uneven coating of the pole pieces, broken belts, bubbles, etc., about 5% of the positive pole pieces are discarded. In addition, after the battery is retired, recycling methods that do not break the pole pieces have begun to appear in the field of battery recycling. However, how to separate and recycle the active materials on retired power batteries is a problem that technicians in this field need to solve. Metals such as lithium, cobalt, nickel, manganese, and aluminum in the active materials have important recycling value. In the prior art, the wetting between the solvent on the current collector and the active material of the pole piece is insufficient, and the active material on the current collector is not easy to fall off from the current collector, resulting in a low recovery rate of the active material. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a waste electrode active material recovery device, which can improve the recovery rate of active materials.

[0004] According to an embodiment of the first aspect of the utility model, a waste electrode active material recovery device comprises: a box body, a solvent holding box, a heating mechanism, a wrinkle generating mechanism, and a winding mechanism, wherein the solvent holding box is installed in the box body, and a solvent is stored in the solvent holding box; the heating mechanism is installed in the box body, and the heating mechanism is used to heat the electrode passing through the heating mechanism; the wrinkle generating mechanism is installed in the box body and is located below the solvent holding box and the heating mechanism, and the electrode is deformed when passing through the wrinkle generating mechanism and the active material in the wrinkle generating mechanism is separated from the electrode; the winding mechanism is installed in the box body, and the winding mechanism drives the electrode to pass through the solvent holding box, the heating mechanism, and the wrinkle generating mechanism in sequence.

[0005] According to some embodiments of the utility model, the wrinkle generating mechanism includes a plurality of wrinkle wheels, the wrinkle wheels are rotatably installed in the box, and the pole pieces are wound around the wrinkle wheels.

[0006] According to some embodiments of the present utility model, the corrugating wheel is provided with arc-shaped ridges.

[0007] According to some embodiments of the present invention, the height difference between the rotation axes of two adjacent corrugating wheels in the vertical direction is smaller than the sum of the radii of two adjacent corrugating wheels in the vertical direction.

[0008] According to some embodiments of the utility model, the wrinkle generating mechanism includes a shaping plate and an arc plate, the shaping plate is connected to the box body and a first arc groove is opened on the shaping plate, the pole piece passes through between the first arc groove and the arc plate, and a first telescopic mechanism is connected to the box body, and the first telescopic mechanism is used to drive the arc plate close to or away from the first arc groove.

[0009] According to some embodiments of the utility model, the wrinkle generating mechanism includes a fixed plate and a pressure plate, the fixed plate is connected to the box body and a second arc-shaped groove is opened on the fixed plate, a second telescopic mechanism is connected to the box body, the second telescopic mechanism is used to drive the pressure plate to approach or move away from the second arc-shaped groove, and a pressure roller matching the second arc-shaped groove is rotatably installed on the pressure plate.

[0010] According to some embodiments of the utility model, the winding mechanism includes an unwinding wheel and a reeling wheel, and the reeling wheel and the unwinding wheel are both rotatably installed in the box body, and the reeling wheel and the unwinding wheel are used to wind the pole piece, and the reeling wheel drives the pole piece to move, and the pole piece passes through the unwinding wheel, the solvent holding box, the heating mechanism, the wrinkle generating mechanism, and the reeling wheel in sequence.

[0011] According to some embodiments of the utility model, a first guide wheel and a second guide wheel are provided in the solvent holding box, the first guide wheel and the second guide wheel are used to guide the pole piece, and the height of the first guide wheel and the second guide wheel is lower than the lowest liquid level in the solvent holding box.

[0012] According to some embodiments of the utility model, the heating mechanism includes a thermal insulation shell, a heating channel, and a heater. The thermal insulation shell is connected to the inner wall of the box body, the heating channel is opened in the thermal insulation shell, and the heater is arranged in the thermal insulation shell. The heater is used to heat the pole piece located in the heating channel.

[0013] According to some embodiments of the present utility model, a lower hopper is provided at the lower end of the box body.

[0014] A waste electrode active material recovery device according to an embodiment of the utility model has at least the following beneficial effects:

[0015] (1) The wrinkle generating mechanism causes the electrode sheet to produce wrinkles, so that the current collector is separated from the active material, and the separation efficiency is high;

[0016] (2) The heating mechanism is provided with a heat-insulating shell to reduce heat loss and improve energy utilization;

[0017] (3) The solvent is stored in a solvent holding box, and the electrode is driven through the solvent holding box by a winding mechanism to ensure that the solvent can fully immerse in the active material, thereby improving the recovery efficiency.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0020] Figure 1 It is a schematic diagram of the internal structure of the box body of the first embodiment of the utility model;

[0021] Figure 2 This is an external schematic diagram of the first embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of a wrinkle generating mechanism according to the first embodiment of the utility model;

[0023] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0024] Figure 5 for Figure 3 The enlarged view of point B in the middle;

[0025] Figure 6 This is a schematic diagram of the interior of a box body according to a second embodiment of the utility model;

[0026] Figure 7 for Figure 6 Enlarged view of point C in the middle;

[0027] Figure 8 This is a schematic diagram of the interior of the box of the third embodiment of the utility model;

[0028] Fig. 9 for Figure 8 Enlarged view of point D in the middle.

[0029] Figure Number:

[0030] Pole piece 100;

[0031] Box body 200, lower hopper 210, door panel 220, motor 230, first telescopic mechanism 240, second telescopic mechanism 250;

[0032] Solvent containing box 300, first slot 301, second slot 302, first guide wheel 303, second guide wheel 304;

[0033] Heating mechanism 400, heat-insulating shell 410, heating channel 420, heater 430;

[0034] The wrinkle generating mechanism 500, the wrinkle wheel 510, the shaping plate 520, the first arc-shaped groove 521, the arc-shaped plate 530, the fixing plate 540, the second arc-shaped groove 541, the pressing plate 550, and the pressing roller 551;

[0035] Winding mechanism 600 , unwinding wheel 610 , and reeling wheel 620 . DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0039] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0040] Reference Figures 1 to 5As shown, a waste electrode active material recovery device of the first embodiment of the utility model is used to recover the active material on the surface of the electrode 100, including: a box 200, a solvent holding box 300, a heating mechanism 400, a wrinkle generating mechanism 500, and a winding mechanism 600. The box 200 is formed by welding steel plates, and the solvent holding box 300 is bolted to the inner wall of the box 200. The solvent holding box 300 stores a solvent; the solvent is an organic solvent that can dissolve the binder in the active material, such as PVDF. Since the active material is fixed to the current collector by an adhesive to form the electrode 100, it is necessary to remove the adhesive as much as possible to make the active material and the current collector easy to separate. The heating mechanism 400 is installed in the box 200. The heating mechanism 400 is used to heat the pole piece 100 passing through the heating mechanism 400. The pole piece 100 absorbs the solvent after passing through the solvent holding box 300. Since the reaction rate of the solvent and the adhesive at room temperature is slow, and the reaction rate between the adhesive and the solvent is related to the reaction temperature, the reaction between the adhesive and the solvent between the current collector and the active material is accelerated by heating. After the adhesive is dissolved in the solvent, the viscosity decreases, thereby reducing the bonding strength between the active material and the current collector, making it easier to separate the active material and the current collector. After the pole piece 100 is heated, the adhesive can be dissolved in the solvent faster, ensuring the separation efficiency of the current collector and the active material, and improving the efficiency of active material recovery. The wrinkle generating mechanism 500 is installed in the housing 200 and is located below the solvent containing box 300 and the heating mechanism 400. The wrinkle generating mechanism 500 deforms the pole piece 100. Since the plastic deformation capacity of the current collector is greater than the plastic deformation capacity of the active material, the active material can be broken and peeled off from the current collector. The active material and the current collector are separated in the wrinkle generating mechanism 500. After being separated, the active material falls from the wrinkle generating mechanism 500 to the bottom of the housing 200. Since the solvent containing box 300 and the heating mechanism 400 are both located above the wrinkle generating mechanism 500, the falling active material will not affect the heating mechanism 400 and the solvent containing box 300. The winding mechanism 600 is installed in the housing 200. The winding mechanism 600 drives the pole piece 100 to pass through the solvent containing box 300, the heating mechanism 400, and the wrinkle generating mechanism 500 in sequence. Since the pole piece 100 is generally in the shape of a long strip, a winding mechanism 600 is used to drive the pole piece 100 containing the active material to first pass through the solvent holding box 300. The pole piece 100 is immersed in the solvent in the solvent holding box 300. The active material in the pole piece 100 absorbs a portion of the solvent. Then the pole piece 100 passes through the heating mechanism 400. The heating mechanism 400 accelerates the reaction rate of the adhesive and the solvent, so that the adhesive is fully dissolved in the solvent, thereby reducing the bonding strength between the active material and the current collector. Then the wrinkle generating mechanism 500 deforms the pole piece 100, and the active material falls from the pole piece 100. Then the active material falls to the bottom of the box 200, and the pole piece 100 is wound on the winding wheel 620.

[0041] Reference Figure 1 and Figure 2 As shown, it can be understood that in the first embodiment of the utility model, the outer wall of the box body 200 is connected to the motor 230, and the motor 230 is a DC stepper motor, and the motor 230 is connected to the winding wheel 620 by transmission. The motor 230 is connected to the winding wheel 620 through a reducer, and the reducer can be a gear reducer, a pulley reducer, etc. Since the pole piece 100 needs to undergo more redirections during movement, the friction force of the pole piece 100 during movement is relatively large, and a larger rotational torque is required to drive the winding wheel 620 to rotate, so a reducer is used to increase the torque of the motor 230. Since the movement speed of the pole piece 100 needs to be accurately controlled to ensure the immersion time of the pole piece 100 in the solvent holding box 300, a stepper motor is selected to control the movement speed of the pole piece 100.

[0042] Reference Figures 1 to 5 As shown, it can be understood that in the first embodiment of the utility model, the wrinkle generating mechanism 500 includes a plurality of wrinkle wheels 510, the number of wrinkle wheels 510 is at least two, the wrinkle wheels 510 are rotatably installed in the box body 200, and the pole piece 100 is wound around the wrinkle wheels 510. The wrinkle wheels 510 also play a role in changing the movement direction of the pole piece 100. It can be foreseen that in order to prevent slipping between the wrinkle wheels 510 and the pole piece 100, it is necessary to increase the tension of the pole piece 100, so the unwinding wheel 610 is connected with a damping device to increase the tension when the winding wheel 620 drives the pole piece 100 to move. The specific structure of the damping device is prior art and will not be described in detail.

[0043] Reference Figures 1 to 5 As shown, a plurality of arcuate ridges are symmetrically arranged on the outer peripheral wall of the corrugation wheel 510, and the extension direction of the arcuate ridges is parallel to the rotation axis of the corrugation wheel 510. The arcuate ridges make the deformation amplitude of the pole piece 100 larger when it abuts against the corrugation wheel 510, thereby promoting the separation of the current collector and the active material.

[0044] Reference Figures 1 to 5 As shown, in order to maximize the contact area between a single corrugation wheel 510 and the pole piece 100, the height difference between the rotation axes of adjacent corrugation wheels 510 in the vertical direction is less than the sum of the radii of two adjacent corrugation wheels 510. This allows the current collector and active materials contained in the pole piece 100 to fall off more thoroughly, thereby improving the recovery rate of the active materials.

[0045] Reference Figure 6 and Figure 7As shown, it can be understood that in the second embodiment of the utility model, the wrinkle generating mechanism 500 includes a shaping plate 520 and an arc plate 530, the shaping plate 520 is bolted to the box body 200, and a first arc groove 521 is provided on the shaping plate 520 on a side close to the arc plate 530, and the first arc groove 521 extends in the front-back direction. An arc channel for the pole piece 100 to pass through is formed between the first arc groove 521 and the arc plate 530, and a first telescopic mechanism 240 is connected to the box body 200, and the first telescopic mechanism 240 uses a telescopic cylinder. The telescopic end of the first telescopic mechanism 240 is connected to the arc plate 530, and the first telescopic mechanism 240 is used to drive the arc plate 530 to approach or move away from the first arc groove 521. When the first telescopic mechanism 240 is extended, it drives the arc plate 530 to extend into the corresponding first arc groove 521 to squeeze the pressing plate 550 and the active material, so that the active material and the pressing plate 550 are separated. Multiple groups of first arc-shaped grooves 521 and arc-shaped plates 530 are provided correspondingly, and multiple arc-shaped plates 530 are connected to the same first telescopic mechanism 240 to increase the deformation area of ​​the pole piece 100 when the first telescopic mechanism 240 drives the arc-shaped plate 530 to move back and forth in a single time. It can be foreseen that when the first telescopic mechanism 240 is extended, the motor 230 stops rotating and the pole piece 100 stops moving. Since the friction between the arc-shaped plate 530 and the pole piece 100 increases when the pole piece 100 is squeezed and deformed by the arc-shaped plate 530, in order to prevent the pole piece 100 from being broken, it is necessary to stop the motor 230, wait for the first telescopic mechanism 240 to retract, and then start the motor 230.

[0046] Reference Figure 8 and Fig. 9 As shown, it can be understood that in the third embodiment of the utility model, the wrinkle generating mechanism 500 includes a fixed plate 540 and a pressing plate 550, the fixed plate 540 is connected to the box body 200 and a second arc groove 541 is opened on the fixed plate 540, and a plurality of second arc grooves 541 on the fixed plate 540 are arranged at intervals up and down. A second telescopic mechanism 250 is connected to the box body 200, and the second telescopic mechanism 250 is used to drive the pressing plate 550 to approach or move away from the second arc groove 541. A plurality of pressing rollers 551 matching the second arc groove 541 are rotatably mounted on the pressing plate 550. The plurality of pressing rollers 551 are arranged at intervals in the up and down directions, and the pressing rollers 551 extend in the front and back directions. The second telescopic mechanism 250 uses a cylinder, and when the second telescopic mechanism 250 is extended, the pressing roller 551 extends into the second arc groove 541, squeezing the pole piece 100 to generate wrinkle deformation, so that the current collector and the active material are separated and fall off. The advantage of using the pressure roller 551 is that it can reduce the friction force when the pole piece 100 moves. Therefore, when the second telescopic mechanism 250 is extended, there is no need to stop the motor 230, which reduces the time required to separate the active material contained in the pole piece 100 per unit length, and effectively improves the separation efficiency.

[0047] Reference Figure 2 As shown, it can be understood that in the first embodiment of the utility model, the side wall of the box body 200 is provided with an inspection port, and the side wall of the box body 200 is detachably connected with a door panel 220. The door panel 220 is bolted to the box body 200, and the size of the door panel 220 is larger than the size of the inspection port. The door panel 220 is used to close the inspection port. During installation and maintenance, the staff removes the door panel 220 and then installs and replaces the solvent holding box 300, the heating mechanism 400, the wrinkle generating mechanism 500, and the winding mechanism 600 through the inspection port. It can be foreseen that a sealing ring is provided between the door panel 220 and the box body 200, and the sealing ring can close the gap between the door panel 220 and the box body 200 to prevent leakage of active materials.

[0048] Reference Figure 1 and Figure 3 As shown, it can be understood that in the first embodiment of the utility model, the winding mechanism 600 includes an unwinding wheel 610 and a reeling wheel 620, and the reeling wheel 620 and the unwinding wheel 610 are both rotatably installed in the box body 200, and the rotation axes of the unwinding wheel 610 and the reeling wheel 620 extend in the front-back direction. The reeling wheel 620 and the unwinding wheel 610 are used to wind the pole piece 100, and the reeling wheel 620 drives the pole piece 100 to move from the unwinding wheel 610 to the reeling wheel 620. During installation, the pole piece 100 is first wound on the unwinding wheel 610, and then the unwinding wheel 610 is installed in the box body 200, and then the pole piece 100 passes through the solvent holding box 300, the heating mechanism 400, and the wrinkle generating mechanism 500 in sequence, and then the pole piece 100 is connected to the reeling wheel 620, and the reeling wheel 620 can wind and pull the pole piece 100 when rotating.

[0049] Reference Figures 1 to 5 As shown, it can be understood that in the first embodiment of the utility model, the upper end of the solvent holding box 300 is provided with a first notch 301 and a second notch 302, and the pole piece 100 enters the solvent holding box 300 from the first notch 301 and leaves the solvent holding box 300 from the second notch 302. The solvent holding box 300 includes a storage box and an upper cover plate, the storage box is bolted to the inner wall of the box body 200, and the upper end of the storage box is open, and the upper cover plate is detachably connected to the upper end of the storage box to close the opening at the upper end of the storage box. The first notch 301 and the second notch 302 are both provided on the upper cover plate. Since the pole piece 100 needs to pass through the first notch 301 and then the second notch 302 during the initial installation, the upper cover plate needs to be removed, and the upper cover plate is installed on the top of the storage box after the pole piece 100 is installed. Setting the upper cover plate in a detachable connection mode is conducive to cleaning the active materials deposited in the storage box. When the pole piece 100 passes through the storage box, a small amount of active material will inevitably drop. In order to prevent excessive accumulation of active material in the storage box, it needs to be cleaned regularly.

[0050] Reference Figures 1 to 5 As shown, it can be understood that in the first embodiment of the utility model, the first guide wheel 303 and the second guide wheel 304 are rotatably installed in the solvent holding box 300, and the heights of the first guide wheel 303 and the second guide wheel 304 are equal. Since the first guide wheel 303 and the second guide wheel 304 are used to guide the pole piece 100, the heights of the first guide wheel 303 and the second guide wheel 304 are lower than the lowest liquid level in the solvent holding box 300. Since the solvent in the solvent holding box 300 will gradually decrease with use, the pole piece 100 may not be exposed to the solvent when passing through the solvent holding box 300. The first guide wheel 303 and the second guide wheel 304 are immersed in the solvent, so the pole piece 100 will remain immersed in the solvent when bypassing the first guide wheel 303 and the second guide wheel 304, which is conducive to increasing the immersion time, ensuring the separation efficiency of the pole piece 100 and the active material, and improving the work efficiency of the product.

[0051] Reference Figures 1 to 5 As shown, it can be understood that in the first embodiment of the utility model, the heating mechanism 400 includes a heat-insulating shell 410, a heating channel 420, and a heater 430. The heat-insulating shell 410 is made of a material with low thermal conductivity, such as a composite material of ceramic and rock wool. The heat-insulating shell 410 keeps the heat generated by the heater 430 inside the heat-insulating shell 410, reduces heat loss, and improves energy utilization. The heat-insulating shell 410 is fixedly connected to the inner wall of the box 200, and the heating channel 420 is opened in the heat-insulating shell 410. The heating channel 420 is vertically arranged to prevent the fallen active material from accumulating in the heating channel 420 and causing blockage. The heat-insulating shell 410 is hollow inside, and the heater 430 is arranged in the heat-insulating shell 410. The heater 430 is made of electric heating wire, and the heater 430 is evenly distributed on the inner wall of the heat-insulating shell 410 to evenly heat the pole piece 100. The heater 430 is used to heat the pole piece 100 located in the heating channel 420. The heating temperature of the heater 430 is set to between 160 degrees Celsius and 200 degrees Celsius. The pole piece 100 is heated by the heater 430 when passing through the heating channel 420. It is foreseeable that a third guide wheel and a fourth guide wheel are rotatably mounted in the box 200, and the projections of the third guide wheel and the fourth guide wheel on the horizontal plane overlap. The third guide wheel and the fourth guide wheel are respectively located on the upper and lower sides of the heating channel 420. The third guide wheel and the fourth guide wheel are used to change the movement direction of the pole piece 100 so that the pole piece 100 passes through the heating channel 420 vertically.

[0052] Reference Figures 1 to 7As shown, a lower hopper 210 is provided below the box 200, the lower hopper 210 gradually narrows from top to bottom, and a discharge pipe is provided at the lower end of the lower hopper 210 to discharge the active material accumulated in the box 200. It is foreseeable that in some other embodiments of the present invention, the active material can also be accumulated at the bottom of the box 200 and then manually cleaned regularly.

[0053] Working principle: The motor 230 drives the winding wheel 620 to rotate, and the winding wheel 620 winds up the pole piece 100, driving the pole piece 100 on the unwinding wheel 610 to move to the winding wheel 620. After the pole piece 100 leaves the unwinding wheel 610, it first changes direction by the first guide wheel 303 and the second guide wheel 304 to enter the solvent holding box 300, and the solvent in the solvent holding box 300 is used to dissolve the adhesive in the active material, so that the viscosity between the active material and the current collector is reduced, and then the pole piece 100 moves to the heating mechanism 400, and the pole piece 100 in the heating channel 420 is heated, so that the adhesive between the current collector and the active material is melted, and the bonding strength between the current collector and the pole piece 100 is further reduced. Then the pole piece 100 enters the wrinkle generating mechanism 500 , which deforms the pole piece 100 , causing the active material to fall from the current collector, and then fall into the lower hopper at the bottom of the box 200 . The current collector separated from the active material is wound on the winding wheel 620 .

[0054] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A waste electrode active material recovery device, used for recovering active materials on the surface of an electrode (100), characterized in that: include: Box (200); A solvent containing box (300) is installed in the box body (200), and a solvent is stored in the solvent containing box (300); A heating mechanism (400) is installed in the box (200), and the heating mechanism (400) is used to heat the pole piece (100) passing through the heating mechanism (400); a wrinkle generating mechanism (500) installed in the box (200) and located below the solvent containing box (300) and the heating mechanism (400); when the pole piece (100) passes through the wrinkle generating mechanism (500), the pole piece (100) is deformed and the active material in the wrinkle generating mechanism (500) is separated from the pole piece (100); The winding mechanism (600) is installed in the box (200), and the winding mechanism (600) drives the pole piece (100) to pass through the solvent containing box (300), the heating mechanism (400), and the wrinkle generating mechanism (500) in sequence.

2. The waste electrode active material recovery device according to claim 1 is characterized by: The wrinkle generating mechanism (500) comprises a plurality of wrinkle wheels (510), the wrinkle wheels (510) are rotatably mounted in the box (200), and the pole piece (100) is wound around the wrinkle wheels (510).

3. The waste electrode active material recovery device according to claim 2 is characterized in that: The corrugating wheel (510) is provided with arc-shaped ridges.

4. The waste electrode active material recovery device according to claim 3 is characterized by: The height difference between the rotation axes of two adjacent corrugating wheels (510) in the vertical direction is smaller than the sum of the radii of the two adjacent corrugating wheels (510) in the vertical direction.

5. The waste electrode active material recovery device according to claim 1 is characterized by: The wrinkle generating mechanism (500) comprises a shaping plate (520) and an arc plate (530); the shaping plate (520) is connected inside the box body (200) and a first arc groove (521) is provided on the shaping plate (520); the pole piece (100) passes through between the first arc groove (521) and the arc plate (530); a first telescopic mechanism (240) is connected inside the box body (200); the first telescopic mechanism (240) is used to drive the arc plate (530) to approach or move away from the first arc groove (521).

6. The waste electrode active material recovery device according to claim 1 is characterized by: The wrinkle generating mechanism (500) comprises a fixed plate (540) and a pressing plate (550); the fixed plate (540) is connected inside the box body (200) and a second arc-shaped groove (541) is provided on the fixed plate (540); a second telescopic mechanism (250) is connected inside the box body (200); the second telescopic mechanism (250) is used to drive the pressing plate (550) to approach or move away from the second arc-shaped groove (541); a pressing roller (551) matching the second arc-shaped groove (541) is rotatably mounted on the pressing plate (550).

7. The waste electrode active material recovery device according to claim 1 is characterized by: The winding mechanism (600) comprises an unwinding wheel (610) and a reeling wheel (620), and the reeling wheel (620) and the unwinding wheel (610) are both rotatably mounted in the box body (200). The reeling wheel (620) and the unwinding wheel (610) are used to wind up the pole piece (100), and the reeling wheel (620) drives the pole piece (100) to move. The pole piece (100) passes through the unwinding wheel (610), the solvent containing box (300), the heating mechanism (400), the wrinkle generating mechanism (500), and the reeling wheel (620) in sequence.

8. The waste electrode active material recovery device according to claim 1 is characterized by: A first guide wheel (303) and a second guide wheel (304) are arranged in the solvent holding box (300); the first guide wheel (303) and the second guide wheel (304) are used to guide the pole piece (100); the heights of the first guide wheel (303) and the second guide wheel (304) are lower than the lowest liquid level in the solvent holding box (300).

9. The waste electrode active material recovery device according to claim 1 is characterized by: The heating mechanism (400) comprises a heat-insulating shell (410), a heating channel (420), and a heater (430); the heat-insulating shell (410) is connected to the inner wall of the box (200); the heating channel (420) is opened in the heat-insulating shell (410); the heater (430) is arranged in the heat-insulating shell (410); and the heater (430) is used to heat the electrode (100) located in the heating channel (420).

10. The waste electrode active material recovery device according to claim 1, characterized in that: A lower hopper (210) is provided at the lower end of the box body (200).

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