A cleaning device and method for recycling lithium battery graphite negative electrode sheet

Abstract

The application discloses a cleaning device and method for recovering lithium battery graphite negative electrode sheets, which comprises a cleaning pool, a conveying net chain is installed in the cleaning pool, a rotating first cross-shaped stirring wheel, a second cross-shaped stirring wheel and a third cross-shaped stirring wheel are installed above the conveying net chain in the cleaning pool, and the first cross-shaped stirring wheel, the second cross-shaped stirring wheel and the third cross-shaped stirring wheel are driven by three independent rotating motors. In the cleaning process, the electrode sheets in the cleaning pool are continuously moved, the moving electrode sheets are continuously stirred by the stirring wheels, and the electrode sheets are rubbed with the conveying net chain, so that the graphite falls off and sinks below the conveying net chain, and the cleaned copper foils are left above the net chain. The method can uniformly stir each electrode sheet and rub the electrode sheet with the net chain as much as possible, so that the graphite of the electrode sheet is completely removed, and the graphite, waste water and copper foils can be well separated after the cleaning is completed.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery recycling, and in particular to a cleaning device and method for recycling lithium battery graphite negative electrode sheets. Background Art

[0002] Graphite materials used in lithium battery anodes are widely used in new energy vehicles and energy storage batteries due to their stable performance, safety, environmental friendliness, and low price. In recent years, the widespread use of lithium batteries has led to a significant increase in production. However, during the production of battery anodes, both during coating and during punching, scraps are generated. Failure to effectively recycle these scraps results in a significant waste of resources.

[0003] The scraps generated during electrode processing are characterized by the absence of electrolyte refilling and overcharge / discharge cycles, allowing the active materials on the electrodes to maintain their initial performance. Exploring an efficient and environmentally friendly scrap recycling method and device is both practical and economically viable.

[0004] Most of the graphite negative electrodes of lithium batteries use water-soluble adhesives. Under the stirring and moving friction of the stirring rod, the graphite will fall off easily; but for those electrodes that are not stirred and experience moving friction, most of the graphite in the negative electrodes is difficult to fall off naturally, and the copper foil in the electrodes cannot be completely washed out.

[0005] In order to clean the copper foil, the stirring workload is often increased, which can easily cause excessive stirring and friction in the electrode, resulting in the copper foil in the electrode being broken and copper powder being mixed into the graphite.

[0006] Stirring and rubbing each electrode, shortening the washing time, reducing the breakage of copper foil, and cleaning the copper foil are important contents of the graphite negative electrode scrap recycling device. Summary of the Invention

[0007] In order to solve the problems mentioned in the above background technology, the present invention provides a cleaning device and method for recycling lithium battery graphite negative electrode sheets.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A cleaning device and method for recycling lithium battery graphite negative electrode sheets include a cleaning pool with a conveyor network chain installed in the cleaning pool. A first cross stirring wheel, a second cross stirring wheel, and a third cross stirring wheel are respectively installed above the conveyor network chain in the cleaning pool. The first cross stirring wheel, the second cross stirring wheel, and the third cross stirring wheel are respectively driven by three independent rotating motors.

[0010] Preferably, a plurality of "V"-shaped graphite collecting grooves are provided at the bottom of the cleaning water pool, and a graphite discharge outlet is provided on one side of the cleaning water pool at a position corresponding to the graphite collecting groove. A conveying screw is rotatably installed in the graphite collecting groove, and one end of the conveying screw extends into the graphite discharge outlet. An automatic sealing mechanism is provided on the graphite discharge outlet.

[0011] Preferably, the automatic blocking mechanism includes a rotatably mounted blocking plate, a gear is fixed on the mounting shaft of the blocking plate, a horizontal sliding block is slidably mounted above the graphite discharge port via a slide rail, a rack is fixed at the bottom end of the horizontal sliding block, and the rack is meshed with the gear.

[0012] Preferably, a threaded sleeve is fixed to the top end of the horizontal sliding block, a threaded rod is arranged in the threaded sleeve, and the threaded rod is driven to rotate by a second rotary motor.

[0013] Preferably, a graphite conveyor belt is provided on one side of the cleaning water pool close to the graphite discharge port, and a graphite collection box is placed on one side of the graphite conveyor belt.

[0014] Preferably, a first pulley is fixed to the end of the conveying screw away from the graphite discharge port, and multiple first pulleys are connected in sequence by belts, one of the first pulleys is coaxially provided with a second pulley, and a third pulley is fixed to the mounting shaft of the first "cross" stirring wheel. A rotatable fourth pulley is also installed on the outer wall of the cleaning pool, and a belt is sleeved between the outer sides of the third pulley and the fourth pulley. A fifth pulley is rotatably installed on the outer wall of the cleaning pool through a bracket, and a polygonal pin is fixed on the side of the fifth pulley close to the fourth pulley. A polygonal sleeve is provided between the fourth pulley and the fifth pulley, and the polygonal sleeve is rotatably installed on the bracket. The bracket is driven by a cylinder, and the polygonal pin extends into the polygonal sleeve. A friction disk is fixed at one end of the polygonal sleeve, and a belt is sleeved between the fifth pulley and the outer side of the second pulley.

[0015] Preferably, a bracket is provided on one side of the cleaning pool, a copper foil collection box is placed on the top of the bracket, and the conveyor mesh chain includes a mesh belt and a mesh rod, and the thickness of the mesh belt at the mesh rod position is the same as that at other positions.

[0016] Preferably, a sewage discharge pipe is installed at the bottom end of the cleaning pool, and a filter is provided in the sewage discharge pipe.

[0017] A cleaning method for recycling graphite negative electrode sheets of lithium batteries comprises the following steps:

[0018] S1: Feeding

[0019] The cleaning tank is filled with hot water, the first, second and third cross-shaped stirring wheels are driven to rotate counterclockwise, the conveying net chain rotates counterclockwise, the material is fed between the first and second cross-shaped stirring wheels, and the fed material is successively fed by the second and third cross-shaped stirring wheels rotating counterclockwise, and is uniformly fed to the outer end of the third cross-shaped stirring wheel. The conveying net chain rotates counterclockwise, and the material is retained between the outer end of the third cross-shaped stirring wheel and the discharge end of the cleaning tank.

[0020] S2: cleaning state A

[0021] The first cross-shaped stirring wheel is driven to rotate counterclockwise, the second and third cross-shaped stirring wheels are driven to rotate clockwise, and the conveying net chain rotates counterclockwise. The first cross-shaped stirring wheel prevents the conveying net chain from rotating and carries the material out;

[0022] The material at the outer end of the third cross-shaped stirring wheel is successively fed by the second and third cross-shaped stirring wheels, and is uniformly fed back to the position between the first and second cross-shaped stirring wheels under the action of the stirring wheels and the conveying net chain;

[0023] S3: cleaning state B

[0024] The first, second and third cross-shaped stirring wheels are driven to rotate counterclockwise, the conveying net chain rotates counterclockwise, and the first cross-shaped stirring wheel prevents the conveying net chain from rotating and carries the material out. The material is successively fed by the second and third cross-shaped stirring wheels, and is uniformly fed to the outer end of the third cross-shaped stirring wheel under the action of the stirring wheels and the conveying net chain;

[0025] S4: continuous cleaning

[0026] The states A and B are repeatedly circulated for multiple times until the copper foil is cleaned;

[0027] S5: discharging

[0028] Drive the first "cross" stirring wheel to rotate counterclockwise, the second "cross" stirring wheel and the third "cross" stirring wheel to rotate counterclockwise, and the conveyor network chain to rotate clockwise. Under the action of the stirring wheel and the conveyor network chain, the material between the counterclockwise rotating first "cross" stirring wheel and the second "cross" stirring wheel is evenly sent to the outer end of the third "cross" stirring wheel and sinks on the conveyor network chain. The clockwise rotating conveyor network chain force brings the material out of the cleaning pool and falls into the copper foil collection box. The sewage is filtered and discharged through the sewage discharge pipe. The graphite is discharged through the graphite collection groove and falls to the top of the graphite conveyor belt and is transported to the graphite collection box for collection.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] In the present invention, during the cleaning process, the electrode in the cleaning pool is continuously moved, and the moving electrode is continuously stirred by each stirring wheel and rubs with the conveyor mesh chain, so that the graphite falls off and sinks under the conveyor mesh chain, and the cleaned copper foil remains above the mesh chain. This method allows each electrode to be stirred and rubbed with the mesh chain as evenly as possible, so that the graphite on the electrode falls off cleanly, and after cleaning is completed, the graphite, wastewater and copper foil can be well separated. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 This is a perspective view of the present invention from a first viewing angle (the conveyor chain is omitted);

[0033] Figure 2 This is a perspective view of the present invention from a second viewing angle (the conveyor chain is omitted);

[0034] Figure 3 This is a front view of the present invention (with the conveyor chain omitted);

[0035] Figure 4 This is a perspective view of the present invention from a third viewing angle (the conveyor chain is omitted);

[0036] Figure 5 for Figure 4 A magnified detail of position A in the middle;

[0037] Figure 6 This is a structural diagram of the automatic blocking mechanism of the present invention;

[0038] Figure 7This is a schematic diagram of the installation position of the conveying screw of the present invention;

[0039] Figure 8 This is a schematic diagram of the installation position of the conveyor network chain of the present invention;

[0040] Figure 9 This is a schematic diagram of the feeding steps of the present invention;

[0041] Figure 10 This is a schematic diagram of step A of the cleaning state of the present invention;

[0042] Figure 11 This is a schematic diagram of step B of the cleaning state of the present invention;

[0043] Figure 12 Schematic diagram of the discharging step of the present invention;

[0044] Figure 13 It is a schematic diagram of the conveying network chain structure in the prior art;

[0045] Figure 14 It is a schematic diagram of the structure of the middle conveying network chain of the present invention;

[0046] In the figure: 1 cleaning pool, 2 conveyor chain, 201 copper foil collection box, 3 rotating motor, 301 first cross stirring wheel, 302 second cross stirring wheel, 303 third cross stirring wheel, 4 graphite collecting groove, 401 graphite discharge port, 402 conveying screw, 403 gear, 404 horizontal sliding block, 405 rack, 406 threaded sleeve, 407 threaded rod, 408 second rotating motor, 409 sealing plate, 5 sewage discharge pipe, 6 graphite conveyor belt, 7 graphite collection box, 8 third pulley, 801 fourth pulley, 802 fifth pulley, 803 polygonal latch, 804 cylinder, 805 polygonal sleeve, 806 friction disk, 807 first pulley, 808 second pulley. DETAILED DESCRIPTION

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0048] Example 1

[0049] Reference Figure 1-12A cleaning device for recycling graphite negative plate of lithium battery, a cleaning device and method for recycling graphite negative plate of lithium battery, comprising a cleaning tank 1, a conveying net chain 2 is installed in the cleaning tank 1, a rotating first "cross" stirring wheel 301, a rotating second "cross" stirring wheel 302 and a rotating third "cross" stirring wheel 303 are respectively installed above the conveying net chain 2 in the cleaning tank 1, the first "cross" stirring wheel 301, the second "cross" stirring wheel 302 and the third "cross" stirring wheel 303 are respectively driven by three independent rotating motors 3,

[0050] The graphite plate is placed on the conveying net chain 2. The graphite plate in the cleaning tank 1 is continuously moved, the moving graphite plate is continuously stirred by each stirring wheel, and the graphite plate is rubbed with the conveying net chain 2 to make the graphite fall into the conveying net chain 2 below, and the cleaned copper foil is left above the conveying net chain 2.

[0051] Embodiment 2

[0052] Reference Figure 1-12 The difference between the embodiment and embodiment 1 is that a plurality of "V"-shaped graphite collecting grooves 4 are arranged at the bottom of the cleaning tank 1, a graphite discharge port 401 is arranged at the position corresponding to the graphite collecting groove 4 on one side of the cleaning tank 1, a conveying screw 402 is rotatably arranged in the graphite collecting groove 4, one end of the conveying screw 402 extends into the graphite discharge port 401, and an automatic blocking mechanism is arranged on the graphite discharge port 401.

[0053] The cleaned and fallen graphite falls into the graphite collecting groove 4, and the graphite can be discharged from the graphite discharge port 401 through the rotation of the conveying screw 402.

[0054] The automatic blocking mechanism comprises a blocking plate 409 rotatably arranged, a gear 403 fixed on the rotating shaft of the blocking plate 409, a horizontal sliding block 404 slidably arranged above the graphite discharge port 401 through a slide rail, a rack 405 fixed at the bottom end of the horizontal sliding block 404, the rack 405 being engaged with the gear 403, a threaded sleeve 406 fixed at the top end of the horizontal sliding block 404, a threaded rod 407 arranged in the threaded sleeve 406, and the threaded rod 407 being driven to rotate by a second rotating motor 408.

[0055] When the second rotating motor 408 drives the threaded rod 407 to rotate, the threaded sleeve 406 and the horizontal sliding block 404 can be horizontally moved, and the rack 405 can be horizontally moved, so that the blocking plate 409 can be rotated through the engagement between the rack 405 and the gear 403, thereby achieving the purpose of automatically opening and closing the graphite discharge port 401.

[0056] Embodiment 3

[0057] Reference Figure 1-14The difference between this embodiment and embodiment 2 is that a graphite conveyor belt 6 is provided on the side of the cleaning water tank 1 close to the graphite discharge port 401, and a graphite collecting box 7 is placed on one side of the graphite conveyor belt 6. The graphite is discharged through the graphite collecting groove 4 and falls to the top of the graphite conveyor belt 6, and is transported to the graphite collecting box 7 for collection.

[0058] Among them, the end of the conveying screw 402 away from the graphite discharge port 401 is fixed with a first pulley 807, and multiple first pulleys 807 are connected in sequence by belts. A second pulley 808 is coaxially arranged on one of the first pulleys 807. A third pulley 8 is fixed to the mounting shaft of the first "cross" stirring wheel 301. A rotating fourth pulley 801 is also installed on the outer wall of the cleaning pool 1. A belt is provided between the outer sides of the third pulley 8 and the fourth pulley 801. The outer wall of the cleaning pool 1 is also provided with a bracket. A fifth pulley 802 is rotatably mounted, a polygonal latch 803 being fixed to the side of the fifth pulley 802 close to the fourth pulley 801, a polygonal sleeve 805 being provided between the fourth pulley 801 and the fifth pulley 802, the polygonal sleeve 805 being rotatably mounted on a bracket driven by a cylinder 804, the polygonal latch 803 extending into the polygonal sleeve 805, a friction disk 806 being fixed to one end of the polygonal sleeve 805, and a belt being sleeved between the fifth pulley 802 and the outer side of the second pulley 808;

[0059] When the friction disk 806 is shortened and brought into contact with the fourth pulley 801 through the cylinder 804, the fourth pulley 801 can drive the fifth pulley 802 to rotate, and then drive the second pulley 808 to rotate, and then drive multiple first pulleys 807 to rotate synchronously, thereby driving the conveying screw 402 to rotate, and the graphite can be discharged from the graphite discharge port 401.

[0060] Among them, a bracket is provided on one side of the cleaning pool 1, and a copper foil collection box 201 is placed on the top of the bracket. Usually, for strength considerations, the conveying mesh chain 2 generally uses thicker mesh rods 203. The wider the conveying mesh chain 2, the thicker the mesh rods 203 need to be. Relatively speaking, the thickness of the mesh belt 202 is thinner, and the thickness of the mesh chain part set outside the mesh rod 203 is larger. The conveying mesh chain 2 is prone to form depressions between adjacent mesh rods 203 (refer to Figure 13 ), the electrode in the depression will remain motionless during stirring and cleaning, and will not move and rub against the conveyor chain 2, causing the copper foil of this part of the electrode to not be cleaned clean, thereby affecting the overall de-powdering effect of the electrode. For this reason, the conveyor chain 2 includes a mesh belt 202 and a mesh rod 203. The thickness of the mesh belt 202 at the position of the mesh rod 203 is the same as the thickness at other positions, so that the mesh belt 202 between adjacent mesh rods 203 will not be depressed, and the overall surface is relatively flat, so that the electrode will not be unable to be stirred, the copper foil is cleaned more completely, and the overall de-powdering effect of the electrode is better.

[0061] A sewage discharge pipe 5 is installed at the bottom end of the cleaning pool 1, and a filter is provided in the sewage discharge pipe 5.

[0062] A cleaning method for recycling graphite negative electrode sheets of lithium batteries comprises the following steps:

[0063] S1: Feeding

[0064] Fill the cleaning pool 1 with hot water, drive the first, second, and third cross-shaped stirring wheels 301, 302, and 303 to rotate counterclockwise, and the conveyor chain 2 to rotate counterclockwise. Feed material between the first and second cross-shaped stirring wheels 301, 302, and then be fed through the counterclockwise stirring relay of the second and third cross-shaped stirring wheels 302, 303, and evenly reach the outer end of the third cross-shaped stirring wheel 303. The conveyor chain 2 rotates counterclockwise, and the material will be retained between the outer end of the third cross-shaped stirring wheel 303 and the discharge end of the cleaning pool.

[0065] S2: Cleaning state A

[0066] The first cross stirring wheel 301 is driven to rotate counterclockwise, and the second cross stirring wheel 302 and the third cross stirring wheel 303 are driven to rotate clockwise, and the conveying network chain 2 rotates counterclockwise. The function of the first cross stirring wheel 301 is to prevent the conveying network chain 2 from rotating and bringing out the material;

[0067] After being stirred and fed in reverse by the third cross-shaped stirring wheel 303 and the second cross-shaped stirring wheel 302, the materials at the outer end of the third cross-shaped stirring wheel 303 are evenly fed back to the position between the first cross-shaped stirring wheel 301 and the second cross-shaped stirring wheel 302 under the action of the stirring wheels and the conveyor network chain 2.

[0068] S3: Cleaning state B

[0069] The first, second, and third cross-shaped stirring wheels 301, 302, and 303 are driven to rotate counterclockwise, and the conveyor network chain 2 rotates counterclockwise. The function of the first cross-shaped stirring wheel 301 is to prevent the conveyor network chain 2 from rotating and carrying out the material. The material is stirred and delivered successively through the second and third cross-shaped stirring wheels 302, 303. Under the action of the stirring wheels and the conveyor network chain 2, the material between the first and second cross-shaped stirring wheels 301, 302 is evenly delivered to the outer end of the third cross-shaped stirring wheel 303.

[0070] S4: Continuous cleaning

[0071] State A and state B are repeated many times until the copper foil is clean;

[0072] S5: Discharging

[0073] Drive the first "cross" stirring wheel 301 to rotate counterclockwise, the second "cross" stirring wheel 302 and the third "cross" stirring wheel 303 to rotate counterclockwise, and the conveying network chain 2 to rotate clockwise. Under the action of the stirring wheel and the conveying network chain 2, the material between the counterclockwise rotating first "cross" stirring wheel 301 and the second "cross" stirring wheel 302 is evenly sent to the outer end of the third "cross" stirring wheel 303 and sinks on the conveying network chain 2. The clockwise rotating conveying network chain 2 relays the material out of the cleaning pool 1 and falls into the copper foil collection box 201. The sewage is filtered and discharged through the sewage discharge pipe 5. The graphite is discharged through the graphite collection groove 4 and falls to the top of the graphite conveyor belt 6, and is transported to the graphite collection box 7 for collection.

[0074] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships 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, 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 should not be understood as limiting the present invention.

[0075] In the present invention, unless otherwise expressly specified or limited, terms such as "disposed," "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; they may refer to mechanical connections, direct connections, or indirect connections through an intermediate medium; they may refer to internal communication between two elements or interaction between two elements. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0076] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by a person skilled in the art. The provision of power is also common knowledge in the art. The present invention is mainly used to protect mechanical devices, so the control method and circuit connection are not explained in detail in the present invention.

[0077] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A cleaning method for recycling graphite negative electrode sheets of lithium batteries, characterized by: The following steps are involved: S1: Feeding Fill the cleaning pool (1) with hot water, drive the first "cross" stirring wheel (301), the second "cross" stirring wheel (302) and the third "cross" stirring wheel (303) to rotate counterclockwise, and the conveying network chain (2) rotates counterclockwise. Feed material between the first "cross" stirring wheel (301) and the second "cross" stirring wheel (302). The fed material is successively fed by the second "cross" stirring wheel (302) and the third "cross" stirring wheel (303) rotating counterclockwise, and evenly reaches the outer end of the third "cross" stirring wheel (303). The conveying network chain (2) rotates counterclockwise, and the material is retained between the outer end of the third "cross" stirring wheel (303) and the discharge end of the cleaning pool; S2: Cleaning state A The first cross stirring wheel (301) is driven to rotate counterclockwise, the second cross stirring wheel (302) and the third cross stirring wheel (303) are driven to rotate clockwise, and the conveying network chain (2) is rotated counterclockwise. The function of the first cross stirring wheel (301) is to prevent the conveying network chain (2) from rotating and carrying out the material; After being stirred and fed in reverse by the third cross stirring wheel (303) and the second cross stirring wheel (302), the material at the outer end of the third cross stirring wheel (303) is evenly fed back to the position between the first cross stirring wheel (301) and the second cross stirring wheel (302) under the action of the stirring wheel and the conveying network chain (2); S3: Cleaning state B The first cross stirring wheel (301), the second cross stirring wheel (302) and the third cross stirring wheel (303) are driven to rotate counterclockwise, and the conveying network chain (2) is rotated counterclockwise. The function of the first cross stirring wheel (301) is to prevent the conveying network chain (2) from rotating and bringing out the material. The material is stirred and delivered successively by the second cross stirring wheel (302) and the third cross stirring wheel (303). Under the action of the stirring wheels and the conveying network chain (2), the material between the first cross stirring wheel (301) and the second cross stirring wheel (302) is evenly delivered to the outer end of the third cross stirring wheel (303); S4: Continuous cleaning State A and state B are repeated many times until the copper foil is clean; S5: Discharging The first cross stirring wheel (301) is driven to rotate counterclockwise, the second cross stirring wheel (302) and the third cross stirring wheel (303) are driven to rotate counterclockwise, and the conveying mesh chain (2) is driven to rotate clockwise. Under the action of the stirring wheels and the conveying mesh chain (2), the material between the counterclockwise rotating first cross stirring wheel (301) and the second cross stirring wheel (302) is evenly sent to the outer end of the third cross stirring wheel (303) and sinks on the conveying mesh chain (2). The clockwise rotating conveying mesh chain (2) takes over and carries the material out of the cleaning pool (1) and falls into the copper foil collection box (201). The sewage is filtered and discharged through the sewage discharge pipe (5). The graphite is discharged through the graphite collection groove (4) and falls to the top of the graphite conveyor belt (6) and is transported to the graphite collection box (7) for collection.

2. A cleaning device for recycling graphite negative electrode sheets of lithium batteries, used for implementing a cleaning method for recycling graphite negative electrode sheets of lithium batteries as claimed in claim 1, comprising a cleaning pool (1), characterized in that: A conveying network chain (2) is installed in the cleaning water pool (1). A first cross stirring wheel (301), a second cross stirring wheel (302), and a third cross stirring wheel (303) are respectively installed above the conveying network chain (2) in the cleaning water pool (1). The first cross stirring wheel (301), the second cross stirring wheel (302), and the third cross stirring wheel (303) are respectively driven by three independent rotating motors (3).

3. The cleaning device for recycling graphite negative electrode sheets of lithium batteries according to claim 2, characterized in that: The bottom of the cleaning water pool (1) is provided with a plurality of V-shaped graphite collecting grooves (4), a graphite discharge outlet (401) is provided at a position corresponding to the graphite collecting groove (4) on one side of the cleaning water pool (1), a conveying screw (402) is rotatably installed in the graphite collecting groove (4), one end of the conveying screw (402) extends into the graphite discharge outlet (401), and an automatic blocking mechanism is provided on the graphite discharge outlet (401).

4. The cleaning device for recycling graphite negative electrode sheets of lithium batteries according to claim 3, characterized in that: The automatic blocking mechanism includes a rotatably mounted blocking plate (409), a gear (403) being fixed to a mounting shaft of the blocking plate (409), a horizontal sliding block (404) being slidably mounted above the graphite discharge port (401) via a slide rail, a rack (405) being fixed to the bottom end of the horizontal sliding block (404), and the rack (405) being meshed with the gear (403).

5. The cleaning device for recycling graphite negative electrode sheets of lithium batteries according to claim 4, characterized in that: A threaded sleeve (406) is fixed to the top end of the horizontal sliding block (404), a threaded rod (407) is provided in the threaded sleeve (406), and the threaded rod (407) is driven to rotate by a second rotating motor (408).

6. The cleaning device for recycling graphite negative electrode sheets of lithium batteries according to claim 3, characterized in that: A graphite conveyor belt (6) is provided on one side of the cleaning water pool (1) close to the graphite discharge port (401), and a graphite collection box (7) is placed on one side of the graphite conveyor belt (6).

7. The cleaning device for recycling graphite negative electrode sheets of lithium batteries according to claim 3, characterized in that: A first pulley (807) is fixed to one end of the conveying screw (402) away from the graphite discharge port (401), and multiple first pulleys (807) are connected in sequence by belts. A second pulley (808) is coaxially mounted on one of the first pulleys (807). A third pulley (8) is fixed to the mounting shaft of the first "cross" stirring wheel (301). A rotating fourth pulley (801) is also mounted on the outer wall of the cleaning pool (1). A belt is sleeved between the outer sides of the third pulley (8) and the fourth pulley (801). The outer wall of the cleaning pool (1) is also rotatably mounted by a bracket. A fifth pulley (802) is provided, a polygonal latch (803) is fixed on one side of the fifth pulley (802) close to the fourth pulley (801), a polygonal sleeve (805) is provided between the fourth pulley (801) and the fifth pulley (802), the polygonal sleeve (805) is rotatably mounted on a bracket, the bracket is driven by a cylinder (804), the polygonal latch (803) extends into the polygonal sleeve (805), a friction disc (806) is fixed at one end of the polygonal sleeve (805), and a belt is provided between the outer sides of the fifth pulley (802) and the second pulley (808).

8. The cleaning device for recycling graphite negative electrode sheets of lithium batteries according to claim 2, characterized in that: A bracket is provided on one side of the cleaning pool (1), and a copper foil collection box (201) is placed on the top of the bracket.

9. The cleaning device for recycling graphite negative electrode sheets of lithium batteries according to claim 2, characterized in that: The conveying mesh chain (2) comprises a mesh belt (202) and a mesh rod (203); the thickness of the mesh belt (202) at the mesh rod (203) is the same as the thickness at other positions.

10. The cleaning device for recycling graphite negative electrode sheets of lithium batteries according to claim 2, characterized in that: A sewage discharge pipe (5) is installed at the bottom end of the cleaning pool (1), and a filter is provided in the sewage discharge pipe (5).

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