Waste pole piece active material recovery device

Abstract

The utility model discloses a waste pole piece active material recovery device which comprises a pole piece traction mechanism, a pole piece recovery mechanism and a material receiving structure, and the pole piece traction mechanism comprises an unwinding wheel and a winding wheel; the pole piece recycling mechanism comprises a spraying structure, a heating structure and an extruding structure which are sequentially arranged in the conveying direction of the pole piece roll; the spraying structure comprises a nozzle; the extrusion structure comprises an extrusion wheel and a transmission wheel, and an extrusion gap is formed between the extrusion wheel and the transmission wheel; according to the utility model, the pole piece traction mechanism is used for dragging the pole piece, so that the pole piece is treated by the spraying structure, the heating structure and the extruding structure in sequence; the spraying structure reduces the viscosity of an adhesive so that the active material can be separated from the current collector more easily, and the heating structure improves the hardness of the active material sprayed with a solvent, so that the subsequent extrusion structure can extrude the active material conveniently, and the active material can fall off from the current collector more easily after being crushed, and therefore, efficient separation of the active material and the current collector can be realized, and the service life of the active material is prolonged. Therefore, the separation process is simplified, and the recovery cost is reduced.

Description

Technical Field

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

[0002] In the process of recycling waste batteries, since the active materials are evenly coated on the current collector through a binder, the active materials are difficult to separate from the current collector. The existing separation method is to first crush the pole pieces, and then remove the copper foil and aluminum foil through a subsequent active material recovery process to obtain active materials that do not contain copper foil and aluminum foil. Although this separation method can recover active materials, it requires the removal of copper foil and aluminum foil, which complicates the separation process and increases the recycling cost. 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.

[0004] The technical scheme of the utility model is as follows, including a pole piece traction mechanism, a pole piece recovery mechanism and a material connection structure, the pole piece traction mechanism includes a unwinding wheel for unwinding the pole piece roll and a winding wheel for recovering the collected fluid; the pole piece recovery mechanism includes a spray structure, a heating structure and an extrusion structure arranged in sequence along the conveying direction of the pole piece roll; the spray structure includes a nozzle for spraying the solvent, and the liquid outlet end of the nozzle faces the coating surface of the pole piece; the heating structure is used to heat the active material on the pole piece that has been sprayed; the extrusion structure includes an extrusion wheel and a transmission wheel, the extrusion wheel and the transmission wheel cooperate with each other and have an extrusion gap for the pole piece to pass through and extrude the heated active material; the material connection structure is used to collect the active material that falls after extrusion.

[0005] The waste electrode active material recovery device according to the utility model has at least the following technical effects: the electrode is pulled by the electrode pulling mechanism, so that it passes through the spraying structure, the heating structure and the extrusion structure for processing in sequence; the spraying structure reduces the viscosity of the adhesive, so that the active material is easier to separate from the current collector, and the heating structure increases the hardness of the active material sprayed with the solvent, which is convenient for the subsequent extrusion structure to perform extrusion, so that the active material is easier to fall off the current collector after being crushed, thereby realizing efficient separation of the active material and the current collector, ensuring that the collected active material does not contain copper foil and aluminum foil, thereby simplifying the separation process and reducing the recovery cost.

[0006] Furthermore, the wheel surface of the extrusion wheel has a plurality of protrusions for extruding the active material.

[0007] Furthermore, the heating structure includes a box body, the box body has at least two heating chambers and a heating component arranged in the heating chamber, a connecting port for the electrode to pass through is arranged between two adjacent heating chambers, one side wall of the box body has a first slot connected to the heating chamber, and the other side wall of the box body has a second slot connected to the heating chamber, and the electrode passes through the first slot, several connecting ports and the second slot in sequence.

[0008] Furthermore, the heating assembly includes at least two heating rollers spaced apart along the length direction of the box body and a heat-conducting belt sleeved outside each of the heating rollers. The pole piece has a bonding surface disposed opposite to the coating surface, and the heat-conducting belt is bonded to the bonding surface.

[0009] Furthermore, the electrode sheet recovery mechanism also includes a scraper, and the extrusion structure and the scraper are arranged in sequence along the conveying direction of the electrode sheet roll, and the scraper is used to peel off the active material on the current collector.

[0010] Furthermore, the axis of the unwinding wheel, the axis of the transmission wheel and the axis of the winding wheel are distributed in a triangle.

[0011] Furthermore, it also includes a recycling box, which has an installation cavity, and the unwinding wheel, the extrusion structure and the winding wheel are all installed in the installation cavity. The material receiving structure is a receiving hopper, and the receiving hopper is arranged at the bottom of the recycling box. The receiving hopper is respectively connected to the installation cavity and the outside of the recycling box.

[0012] Furthermore, a partition is installed in the installation cavity, and the partition divides the installation cavity into a first chamber and a second chamber. The partition has a third slot for the pole piece to pass through. The unwinding wheel and the nozzle are arranged in the first chamber, and the heating structure, the extrusion structure and the winding wheel are arranged in the second chamber.

[0013] Furthermore, the recycling box has a reeling opening corresponding to the position of the reeling wheel and a reeling opening corresponding to the position of the reeling wheel, and both the reeling opening and the reeling opening are equipped with door panels that can be opened or closed.

[0014] Furthermore, the spray structure includes a solvent storage tank, a pipeline and a pump, the pipeline is connected to the solvent storage tank and the spray head respectively, and the pump is arranged on the pipeline.

[0015] 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

[0016] Additional aspects and advantages of the present invention will become apparent and easily understood from the description of the technical solution in conjunction with the following drawings, in which:

[0017] Figure 1 is a cross-sectional view of a recycling bin;

[0018] Figure 2 It is a cross-sectional view of the heating structure in a certain direction;

[0019] Figure 3 is a cross-sectional view of the heating structure in another direction;

[0020] Figure 4 This is a schematic diagram of the structure of a device for recovering active materials from waste electrodes.

[0021] Reference numerals: pole piece traction mechanism 100, unwinding wheel 110, winding wheel 120, pole piece recovery mechanism 200, coating surface 201, spray structure 210, spray head 211, solvent storage tank 212, pipeline 213, pump 214, heating structure 220, box 221, connecting port 2211, first notch 2212, second notch 2213, heat preservation chamber 2214, heat insulation board 2215, heating chamber 222, heating assembly 223, heating Hot roller 2231, heat conducting belt 2232, transmission shaft 2233, extrusion structure 230, extrusion wheel 231, protrusion 2311, transmission wheel 232, scraper 240, support rod 241, side rod 250, material receiving structure 300, material receiving hopper 310, recovery box 400, installation cavity 410, partition 411, third slot 4111, first chamber 412, second chamber 413, unwinding port 420, winding port 430, door panel 440. DETAILED DESCRIPTION

[0022] The technical solution of the present invention is described in detail below, and examples of the technical solution are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The technical solution described below with reference to the accompanying drawings is exemplary and is only used to explain the present invention, and cannot be understood as limiting the present invention.

[0023] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In the description of the present utility model, "several" means one or more, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0025] 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.

[0026] Reference Figure 1 As shown, the waste electrode active material recovery device provided in the embodiment of the utility model includes an electrode traction mechanism 100, an electrode recovery mechanism 200 and a material connection structure 300, the electrode traction mechanism 100 includes an unwinding wheel 110 for unwinding the electrode roll and a reeling wheel 120 for recovering the collected fluid; the electrode recovery mechanism 200 includes a spray structure 210, a heating structure 220 and an extrusion structure 230 arranged in sequence along the conveying direction of the electrode roll; the spray structure 210 includes a nozzle 211 for spraying a solvent, and the liquid outlet end of the nozzle 211 faces the coating surface 201 of the electrode; the heating structure 220 is used to heat the active material on the electrode that has been sprayed; the extrusion structure 230 includes an extrusion wheel 231 and a transmission wheel 232, the extrusion wheel 231 and the transmission wheel 232 cooperate with each other, and there is an extrusion gap between the extrusion wheel 231 and the transmission wheel 232 for the electrode to pass through and extrude the heated active material; the material connection structure 300 is used to collect the active material that falls after extrusion.

[0027] The pole piece traction mechanism 100 is used to traction the pole piece, so that it passes through the spray structure 210, the heating structure 220 and the extrusion structure 230 for processing in sequence; the spray structure 210 can reduce the viscosity of the adhesive, so that the active material can be more easily separated from the current collector, and the heating structure 220 can increase the hardness of the active material sprayed with the solvent, which is convenient for the subsequent extrusion structure 230 to perform extrusion, so that the active material can be more easily separated from the current collector after being crushed, thereby achieving efficient separation of the active material and the current collector, ensuring that the collected active material does not contain copper foil and aluminum foil, thereby simplifying the separation process and reducing the recycling cost.

[0028] like Figure 1As shown, during operation, the pole piece roll is placed on the unwinding wheel 110, and the unwinding wheel 110 performs the unwinding operation. The pole piece passes through the spraying structure 210, the heating structure 220 and the extrusion structure 230 in sequence, and then passes through the reeling wheel 120 for the reeling operation; when the pole piece passes through the spraying structure 210, the nozzle 211 sprays the solvent onto the coating surface 201 of the pole piece, thereby reducing the viscosity of the binder in the active material and facilitating the active material to fall off from the current collector; when the pole piece passes through the heating structure 220, the heating structure 220 heats the active material sprayed with the solvent, thereby increasing the hardness of the active material, making it easier for the active material to fall off from the current collector, thereby increasing the recovery rate of the active material; when the pole piece passes through the extrusion structure 230, the pole piece passes through the extrusion gap between the extrusion wheel 231 and the transmission wheel 232, and the extrusion wheel 231 and the transmission wheel 232 jointly extrude the active material on the current collector, causing the active material to deform after extrusion, thereby causing the active material to fall off the current collector and be collected by the material receiving structure 300.

[0029] Specifically, the extrusion wheel 231 and the transmission wheel 232 cooperate with each other in that they rotate synchronously; the outlet of the nozzle 211 is flat, and its width is adapted to the width of the electrode piece, so that the nozzle 211 can spray the solvent evenly on the coating surface 201; the active material can be a positive electrode material.

[0030] Furthermore, the wheel surface of the extrusion wheel 231 has a plurality of protrusions 2311 for extruding the active material, so that the extrusion wheel 231 increases the deformation of the active material during the process of extruding the electrode piece, making it easier for the active material to fall off.

[0031] Furthermore, if Figure 1 , 2 As shown, the heating structure 220 includes a box body 221, and the box body 221 has at least two heating chambers 222 and a heating component 223 arranged in the heating chamber 222. The electrode can pass through the box body 221 and pass through the at least two heating chambers 222 in sequence; the temperature of the at least two heating chambers 222 can be designed to gradually increase along the conveying direction of the electrode roll. When the electrode passes through the box body 221, the temperature gradually increases, thereby preventing the electrode from breaking due to a sudden temperature rise, thereby improving the stability of the active material recovery process, or according to production needs, the temperature of the at least two heating chambers 222 can also gradually decrease along the conveying direction of the electrode roll; by providing the box body 221, the heat is stored inside the box body 221, heat diffusion is prevented, and heat loss is reduced.

[0032] Specifically, there are two heating chambers 222, such as Figure 2 As shown, the box body 221 has a heat preservation chamber 2214, and a heat insulation board 2215 is arranged in the heat preservation chamber 2214. The heat preservation chamber 2214 is divided into two heating chambers 222 by the heat insulation board 2215. The heat insulation board 2215 has a connecting port 2211, and the two heating chambers 222 are connected through the connecting port 2211. Figure 3 As shown, one end of the box body 221 has a first notch 2212 connected to one of the heating chambers 222, and the other end of the box body 221 has a second notch 2213 connected to the other heating chamber 222. The temperature of the heating chamber 222 close to the first notch 2212 is 50°-125°, and the temperature of the heating chamber 222 away from the first notch 2212 is 125°-200°. During operation, the electrode passes through the first notch 2212, the connecting port 2211 and the second notch 2213 in sequence, and the heating component 223 heats the electrode.

[0033] Specifically, the box body 221 and the insulation board 2215 are both made of thermal insulation materials to prevent heat diffusion and reduce heat loss.

[0034] Furthermore, if Figure 2 As shown, the heating assembly 223 includes at least two heating rollers 2231 spaced apart along the length direction of the box body 221 and a heat-conducting belt 2232 sleeved on the outside of each heating roller 2231. The electrode has a bonding surface (not shown in the figure) disposed opposite to the coating surface 201. The heat-conducting belt 2232 is bonded to the bonding surface, that is, the active material is bonded to the front side of the electrode, and the heat-conducting belt 2232 is bonded to the back side of the electrode. The heat-conducting belt 2232 is bonded to the electrode to uniformly heat the electrode, thereby uniformly reducing the viscosity of the adhesive.

[0035] Specifically, the heating roller 2231 is a resistance heating roller, and the heating temperature of the heating roller 2231 is controlled by adjusting the voltage.

[0036] Specifically, Figure 2 As shown, the heating assembly 223 also includes a transmission shaft 2233, and the heating roller 2231 is sleeved outside the transmission shaft 2233. When working, the transmission shaft 2233 drives the heating roller 2231 to rotate, and the heating roller 2231 drives the heat-conducting belt 2232 to move.

[0037] Furthermore, if Figure 1 As shown, the electrode sheet recovery mechanism 200 also includes a scraper 240. The extrusion structure 230 and the scraper 240 are arranged in sequence along the conveying direction of the electrode sheet roll. The scraper 240 is used to peel off the active material on the current collector. By providing the scraper 240, the recovery of the active material can be more thorough and the effect is better.

[0038] Furthermore, if Figure 1 As shown, the axis of the unwinding wheel 110, the axis of the driving wheel 232 and the axis of the winding wheel 120 are distributed in a triangle, and the driving wheel 232 plays the role of tensioning the pole piece, making it easier for the squeezing wheel 231 to squeeze the active material on the current collector.

[0039] Specifically, Figure 1As shown, the unwinding wheel 110 and the winding wheel 120 are arranged at intervals in the up-down direction, and the extrusion structure 230 is located on the left side of the unwinding wheel 110 and on the left side of the winding wheel 120, so that the unwinding wheel 110, the transmission wheel 232 and the winding wheel 120 are distributed in a triangle, and the transmission wheel 232 plays the role of tensioning the pole piece, thereby increasing the tension of the active material during the extrusion process and facilitating the crushed active material to fall onto the material receiving structure 300.

[0040] Furthermore, if Figure 1 As shown, it also includes a recycling box 400, the recycling box 400 has an installation cavity 410, the unwinding wheel 110, the extrusion structure 230 and the winding wheel 120 are installed in the installation cavity 410 and are arranged at intervals along the height direction of the recycling box 400, the material receiving structure 300 is a receiving hopper 310, and the receiving hopper 310 is arranged at the bottom of the recycling box 400. The receiving hopper 310 is connected to the installation cavity 410 and the outside of the recycling box 400 respectively, so that the crushed active material and the scraped active material can fall onto the receiving hopper 310 by their own weight, so that the structure of the recycling device is simple.

[0041] Furthermore, if Figure 1 As shown, the scraper 240 is disposed below the winding wheel 120 , for example, the scraper 240 is fixed to the receiving hopper 310 via a support rod 241 .

[0042] Furthermore, if Figure 1 As shown, a partition 411 is installed in the installation cavity 410, and the partition 411 divides the installation cavity 410 into a first chamber 412 and a second chamber 413. The partition 411 has a third slot 4111 for the pole piece to pass through. The unwinding wheel 110 and the nozzle 211 are arranged in the first chamber 412, and the heating structure 220, the extrusion structure 230 and the winding wheel 120 are arranged in the second chamber 413. The partition 411 is provided to prevent the heat of the box 221 from flowing to the vicinity of the nozzle 211, thereby avoiding the volatilization of the solvent.

[0043] Specifically, the partition 411 is made of heat-insulating material to insulate the second chamber 413 and improve the heating effect.

[0044] Specifically, Figure 1 As shown, the spray head 211 is disposed near the unwinding wheel 110 to facilitate spraying the solution.

[0045] Specifically, Figure 1 As shown, the heating structure 220 is fixed in the recovery box 400 by the side rods 250 .

[0046] Furthermore, if Figure 1 , 4As shown, the recycling box 400 has an unwinding port 420 corresponding to the position of the unwinding wheel 110 and a rewinding port 430 corresponding to the position of the rewinding wheel 120. Both the unwinding port 420 and the rewinding port 430 are equipped with a door panel 440 that can be opened or closed to facilitate the removal of the electrode roll and the current collector roll.

[0047] Furthermore, if Figure 4 As shown, the spray structure 210 includes a solvent storage tank 212, a pipeline 213 and a pump 214, the pipeline 213 is connected to the solvent storage tank 212 and the nozzle 211 respectively, and the pump 214 is arranged on the pipeline 213; by providing the solvent storage tank 212, the pipeline 213 and the pump 214, it is convenient to transport the solution; specifically, the solvent storage tank 212 is arranged outside the recovery box 400, which is convenient for replacing the solvent.

[0048] Specifically, the winding wheel 120 is connected to the motor, and the motor drives the winding wheel 120 to rotate. The winding wheel 120 drives the transmission wheel 232 and the unwinding wheel 110 to rotate through the pole piece, and the transmission wheel 232 drives the extrusion wheel 231 to rotate.

[0049] Although the technical solutions of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the technical solutions without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A device for recovering waste electrode active materials, characterized in that: include: A pole piece traction mechanism (100) comprises an unwinding wheel (110) for unwinding a pole piece roll and a rewinding wheel (120) for recycling collected fluid; The electrode recovery mechanism (200) comprises a spray structure (210), a heating structure (220) and an extrusion structure (230) which are sequentially arranged along the conveying direction of the electrode roll; the spray structure (210) comprises a nozzle (211) for spraying a solvent, the liquid outlet end of the nozzle (211) faces the coating surface (201) of the electrode; the heating structure (220) is used to heat the active material on the electrode that has been sprayed; the extrusion structure (230) comprises an extrusion wheel (231) and a transmission wheel (232), the extrusion wheel (231) and the transmission wheel (232) cooperate with each other and have an extrusion gap for the electrode to pass through and extrude the heated active material; The material receiving structure (300) is used to collect the active material dropped after extrusion.

2. The waste electrode active material recovery device according to claim 1 is characterized by: The wheel surface of the extrusion wheel (231) has a plurality of protrusions (2311) for extruding the active material.

3. The waste electrode active material recovery device according to claim 1 is characterized in that: The heating structure (220) comprises a box (221), the box (221) having at least two heating chambers (222) and a heating assembly (223) arranged in the heating chamber (222), a connecting port (2211) for a pole piece to pass through is arranged between two adjacent heating chambers (222), one side wall of the box (221) has a first notch (2212) communicating with the heating chamber (222), the other side wall of the box (221) has a second notch (2213) communicating with the heating chamber (222), and the pole piece passes through the first notch (2212), a plurality of the connecting ports (2211) and the second notch (2213) in sequence.

4. The waste electrode active material recovery device according to claim 3 is characterized by: The heating assembly (223) comprises at least two heating rollers (2231) spaced apart along the length direction of the box body (221) and a heat-conducting belt (2232) sleeved outside each of the heating rollers (2231); the pole piece has a bonding surface disposed opposite to the coating surface (201), and the heat-conducting belt (2232) is bonded to the bonding surface.

5. The waste electrode active material recovery device according to claim 1 is characterized by: The electrode sheet recovery mechanism (200) further comprises a scraper (240), the extrusion structure (230) and the scraper (240) are arranged in sequence along the conveying direction of the electrode sheet roll, and the scraper (240) is used to strip the active material on the current collector.

6. The waste electrode active material recovery device according to claim 1 is characterized by: The axis of the unwinding wheel (110), the axis of the transmission wheel (232) and the axis of the winding wheel (120) are distributed in a triangle.

7. The waste electrode active material recovery device according to any one of claims 1 to 6, characterized in that: It also includes a recycling box (400), the recycling box (400) has an installation cavity (410), the unwinding wheel (110), the extrusion structure (230) and the winding wheel (120) are all installed in the installation cavity (410), the material receiving structure (300) is a receiving hopper (310), and the receiving hopper (310) is arranged at the bottom of the recycling box (400), and the receiving hopper (310) is respectively connected to the installation cavity (410) and the outside of the recycling box (400).

8. The waste electrode active material recovery device according to claim 7 is characterized by: A partition (411) is installed in the installation cavity (410), and the partition (411) divides the installation cavity (410) into a first chamber (412) and a second chamber (413). The partition (411) has a third slot (4111) for the pole piece to pass through. The unwinding wheel (110) and the nozzle (211) are arranged in the first chamber (412), and the heating structure (220), the extrusion structure (230) and the winding wheel (120) are arranged in the second chamber (413).

9. The waste electrode active material recovery device according to claim 7 is characterized in that: The recycling box (400) has an unwinding opening (420) corresponding to the position of the unwinding wheel (110) and a rewinding opening (430) corresponding to the position of the rewinding wheel (120), and both the unwinding opening (420) and the rewinding opening (430) are equipped with door panels (440) that can be opened or closed.

10. The waste electrode active material recovery device according to claim 1, characterized in that: The spray structure (210) comprises a solvent storage tank (212), a pipeline (213) and a pump (214); the pipeline (213) is connected to the solvent storage tank (212) and the spray head (211) respectively; and the pump (214) is arranged on the pipeline (213).

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