A lithium ion battery negative electrode graphite regeneration device and method

Abstract

The application discloses a kind of lithium ion battery negative electrode graphite regeneration equipment and method, belong to lithium ion battery processing technical field;A kind of lithium ion battery negative electrode graphite regeneration equipment, including rack and setting on the flushing spray head of rack, further include: water washing box, setting on the rack, its top is equipped with hopper, the water direction of the flushing spray head is towards the hopper;Mixing block, rotatably set in the water washing box, for accommodating and shaking material, the mixing block is evenly opened in the circumferential mixing groove;Filtering water conical cylinder, setting on the rack, be communicated with the water washing box by discharging pipe, for extruding water in material;Crushed material box, setting on the hopper, be communicated with the filtering water conical cylinder by feeding pipe;The present application is integrated into single-power closed-loop system by mechanical linkage with washing, filter pressing, crushing three processes, solve the problem of high acid residual rate and large energy consumption in traditional graphite regeneration.

Description

Technical Field

[0001] This invention relates to the field of lithium-ion battery processing technology, specifically to a lithium-ion battery negative electrode graphite regeneration equipment and method. Background Technology

[0002] Since their commercialization in 1990, lithium-ion batteries have been widely used in mobile phones, laptops, digital cameras, medical devices, and military applications due to their advantages such as high capacity, light weight, good cycle performance, and low pollution. With technological advancements, they are expanding into emerging fields such as new energy vehicles and large-scale industrial energy storage systems. The lifespan of lithium-ion batteries is generally 3-5 years, resulting in a large number of used lithium-ion batteries generated annually. Failure to recycle and reuse these used lithium-ion batteries would lead to a significant waste of resources.

[0003] When lithium-ion battery negative electrode graphite is recycled, it generally needs to undergo discharge, disassembly, crushing and sieving, acid washing, water washing, and high-temperature drying to obtain reusable graphite powder. However, traditional water washing of acid-washed graphite powder is ineffective, wasting a lot of water resources. In addition, some acidic liquid remains in the washed graphite, affecting the subsequent use of graphite and reducing the quality of battery processing. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing a lithium-ion battery negative electrode graphite regeneration device and method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A lithium-ion battery negative electrode graphite regeneration device includes a frame and a rinsing nozzle mounted on the frame, and further includes:

[0007] A washing tank is installed on the frame, and a hopper is provided on its top. The water spray direction of the rinsing nozzle is towards the hopper.

[0008] A mixing block is rotatably disposed inside the washing tank for containing and shaking the material. The mixing block has a mixing trough evenly distributed around its circumference.

[0009] A water-filtering cone is mounted on the frame and connected to the washing tank via a feed pipe, used to squeeze out the water from the material;

[0010] A crushing bin is located above the feeding hopper and is connected to the filter cone via a feeding pipe. It is used to crush agglomerated materials after filtration.

[0011] The outlet of the crushing bin is configured to correspond to the discharge hopper so that the crushed material can be returned to the washing process.

[0012] Preferably, the water filter conical cylinder is equipped with a filter press assembly, including:

[0013] The bracket is fixed to the frame;

[0014] The drive motor is fixed on the bracket;

[0015] An eccentric rod is connected to the output shaft of the drive motor;

[0016] The rotating rod is connected to the other end of the eccentric rod and is coaxially arranged with the output shaft of the drive motor.

[0017] The spiral conveyor plate is mounted on the rotating rod and rotates inside the water-filtering cone. Its radius gradually decreases from bottom to top as the water-filtering cone rotates.

[0018] Preferably, a connecting ring is sleeved on the eccentric rod;

[0019] The connecting rod is fixed at one end to the connecting ring;

[0020] A movable frame is slidably mounted on the machine frame and movably connected to the other end of the connecting rod;

[0021] The first rack plate and the second rack plate are disposed on the movable frame;

[0022] The first one-way gear and the second one-way gear are disposed on both sides of the mixing block and mesh with the first rack plate and the second rack plate, respectively.

[0023] Preferably, the first one-way gear and the second one-way gear have the same size and structure, and the meshing distance between the first rack plate and the first one-way gear is greater than the meshing distance between the second rack plate and the second one-way gear.

[0024] Preferably, the first one-way gear includes:

[0025] A fixed wheel is connected to the mixing block;

[0026] The movable wheel is rotatably connected to the outside of the fixed wheel and meshes with the first rack plate;

[0027] A receiving groove is formed inside the fixed wheel;

[0028] The locking teeth are rotatably connected to the receiving groove via a rotating shaft, and move against the inner side wall of the movable wheel;

[0029] The limiting groove is evenly formed in a circular shape on the inner side wall of the movable wheel, and engages with the locking teeth.

[0030] A second torsion spring is disposed on the rotating shaft and is used to drive the retaining teeth to return to their original rotation.

[0031] Preferably, a movable plate is slidably connected inside the mixing tank, and a first elastic element is provided between the movable plate and the inner wall of the mixing tank.

[0032] Preferably, the shredder is provided with a shredding assembly, comprising:

[0033] A swing plate is rotatably connected to the outside of the shredder via a rotating rod;

[0034] A first torsion spring is mounted on the rotating rod and is used to drive the swing plate to return to its original rotation.

[0035] Movable holes are provided on both sides of the swing plate;

[0036] The positioning rod is movably disposed within the movable hole;

[0037] The lifting plate is fixed to the positioning rod;

[0038] The scrap parts are connected to the lifting plate via a connecting rod.

[0039] Preferably, the scrap component comprises:

[0040] The movable rod is connected to the lifting plate via a connecting rod;

[0041] The movable ball is rotatably connected to the shredder via a pin and is connected to the movable rod.

[0042] The material-tapping plate is located inside the crushing box and is connected to the end of the movable ball away from the movable rod.

[0043] Preferably, a first connecting plate is fixed to the top of the rotating rod;

[0044] The second connecting plate is rotatably connected to the first connecting plate via a pin.

[0045] A pull rope is connected to the end of the second connecting plate away from the first connecting plate, and the other end is connected to the swing plate;

[0046] The limiting seat is fixed on the feeding tube and slides in cooperation with the pull rope.

[0047] This invention also discloses a method for regenerating graphite anode material for lithium-ion batteries, which involves processing the graphite using a lithium-ion battery anode material regeneration device, and includes the following steps:

[0048] S1: The pickled graphite powder is put into the hopper, and the flushing nozzle sprays water into the hopper to wash the acid solution on the surface of the graphite powder.

[0049] S2: The drive motor drives the moving frame to slide back and forth through the eccentric rod. The first rack plate of the moving frame meshes with the first one-way gear, and the second rack plate meshes with the second one-way gear. Both the first one-way gear and the second one-way gear are one-way rotating gears.

[0050] When the moving frame moves to the right, the first rack plate meshes with the first one-way gear, and the first one-way gear will drive the mixing block to rotate counterclockwise. The meshing of the second rack plate with the second one-way gear will not drive the mixing block to rotate.

[0051] When the moving frame moves to the left, the meshing of the first rack plate and the first one-way gear will not drive the mixing block to rotate, while the meshing of the second rack plate and the second one-way gear will drive the mixing block to rotate clockwise.

[0052] Because the meshing distance between the first rack plate and the first one-way gear is large, when the mixing block rotates back and forth intermittently in the counterclockwise and clockwise directions relative to the washing tank, the final rotation direction of the mixing block will still be slowly along the counterclockwise direction.

[0053] S3: The graphite powder that has been rinsed in the hopper for the first time will enter the mixing tank. As the mixing block moves back and forth intermittently, and the movable plate in the mixing tank is supported by the first elastic element, the graphite powder and water will repeatedly sway in the tank.

[0054] S4: After washing, the graphite powder enters the filter cone through the feed pipe. The spiral conveyor blades rotate with the rotating rod, pushing the material from bottom to top. As the diameter of the filter cone gradually decreases, the residual acid in the graphite powder is squeezed out with the water.

[0055] S5: After the graphite powder is filtered, it clumps into the crushing box through the feeding pipe. The rotating rod pulls the rope intermittently through the first connecting plate and the second connecting plate. The rope pulls the swing plate to swing back and forth. The linkage lifting plate drives the moving rod. The moving rod drives the patting plate to pat the graphite powder clumps through the moving ball. After the graphite powder clumps are broken, they fall back into the hopper and are added to the washing step again.

[0056] As can be seen from the above technical solutions, the present invention has the following beneficial effects:

[0057] 1. In this invention, the three processes of water washing, pressure filtration and crushing are integrated into a single-power closed-loop system through mechanical linkage, which solves the problems of traditional rinsing only washing the surface and the high rate of residual acid inside, and the increased energy consumption and time cost of multi-process separation operation, effectively improving the processing efficiency of lithium-ion batteries and reducing their processing cost;

[0058] 2. In this invention, the mixing block rotates intermittently in one direction when the rack plate meshes with the one-way gear, taking equal amounts of graphite powder and water from the hopper. The graphite powder and water are dynamically shaken due to the reciprocating rotation of the mixing tank, so that the graphite powder and water are mixed evenly. The water can effectively wash the accumulated graphite powder, improve the acid precipitation rate, and solve the problem of water waste caused by repeated rinsing with a large amount of water in the static water washing of traditional technology.

[0059] 3. In this invention, when the graphite powder and water are shaken by the mixing tank, the graphite powder and water impact the movable plate, causing the movable plate to swing elastically in the mixing tank, expanding the volume of the mixing tank, so that the graphite powder and water have enough space to shake in the mixing tank, and the mixed materials form a vortex in the telescopic cavity, effectively flushing the dead corner acid liquid, and further improving the rinsing effect on the graphite powder.

[0060] 4. In this invention, the graphite powder after pressure filtration is crushed so that it can re-enter the rinsing system. This avoids the rinsing nozzles only impacting the graphite powder that has just fallen and failing to rinse the graphite powder that has previously fallen to the bottom of the hopper. At the same time, it effectively solves the problem of graphite agglomeration after dehydration, which makes secondary rinsing difficult. Attached Figure Description

[0061] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0062] Figure 2 For the present invention Figure 1 Enlarged structural diagram of section A in the middle;

[0063] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0064] Figure 4 This is a cross-sectional structural diagram of the present invention;

[0065] Figure 5 For the present invention Figure 4 Enlarged structural diagram of section B in the middle;

[0066] Figure 6 This is a schematic diagram of the structure of the first one-way gear of the present invention;

[0067] Figure 7 This is a cross-sectional structural diagram of the washing tank of the present invention;

[0068] Figure 8 This is a schematic cross-sectional view of the water-filtering conical cylinder of the present invention;

[0069] Figure 9 This is a schematic diagram of the structure of the crushing bin of the present invention;

[0070] Figure 10 This is a cross-sectional structural diagram of the crushing bin of the present invention;

[0071] Figure 11 This is a schematic diagram of the material-tapping plate structure of the present invention.

[0072] In the diagram: 1. Frame; 2. Washing tank; 201. Feed hopper; 3. Mixing block; 301. Mixing trough; 4. Filter cone; 5. Feeding pipe; 6. Crushed material bin; 7. Feeding pipe; 8. Washing nozzle; 9. Support; 901. Drive motor; 902. Eccentric rod; 9021. Connecting ring; 9022. Connecting rod; 9023. Moving frame; 9024. First rack plate; 9025. Second rack plate; 9026. First one-way gear; 9027. Second one-way gear 903. Wheel; 904. Rotating rod; 10. Screw conveyor plate; 10. Movable plate; 1001. First elastic element; 11. Movable ball; 111. Material tapping plate; 112. Movable rod; 12. Swing plate; 121. Movable hole; 122. Positioning rod; 123. Lifting plate; 13. First connecting plate; 131. Second connecting plate; 132. Pull rope; 14. Limiting seat; 15. Fixed wheel; 151. Movable wheel; 152. Receiving groove; 153. Clamping tooth; 154. Limiting groove. Detailed Implementation

[0073] A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0074] To achieve the above objectives, the embodiments of the present invention adopt the following technical solutions:

[0075] Reference Figure 1 , Figure 3 , Figure 4 , Figure 7 , Figure 8 and Figure 9As shown, this embodiment proposes a lithium-ion battery negative electrode graphite regeneration device, belonging to the field of lithium-ion battery processing technology. It includes a frame 1 and a rinsing nozzle 8 mounted on the frame 1. The water inlet of the rinsing nozzle 8 is connected to a water supply device via a water pipe. The water supply device is existing technology and will not be described in detail here. It also includes a washing tank 2, a mixing block 3, a filter cone 4, and a crushing bin 6. The washing tank 2 is mounted on the frame 1, and its top is equipped with a feeding hopper 201. The water spray direction of the rinsing nozzle 8 is towards the feeding hopper 201. The acid-washed graphite powder enters the washing tank 2 through the feeding hopper 201, and the rinsing nozzle 8 sprays downwards. The hopper 201 sprays water to wash away the acid on the surface. The water pressure and flow rate of the rinsing nozzle 8 should match the agitation frequency. The mixing block 3 is rotatably set in the washing tank 2 to hold and agitate the material. The mixing block 3 has a uniformly circumferentially distributed mixing groove 301 inside. The filter cone 4 is set on the frame 1 and connected to the washing tank 2 through the feed pipe 5. It is used to squeeze out the water in the material. The crushing box 6 is set above the feed hopper 201 and connected to the filter cone 4 through the feed pipe 7. It is used to crush the agglomerated material after pressing and filtration. The outlet of the crushing box 6 is set to correspond to the feed hopper 201 so that the crushed material can be returned to the rinsing process.

[0076] The mixing block 3 intermittently rotates forward and backward, causing the graphite powder to repeatedly slosh within the mixing tank 301, enhancing the washing effect. The washed mixture then enters the filter cone 4 through the discharge pipe 5. The spiral conveyor plate 904 gradually shrinks as the cone diameter decreases, squeezing out residual acid. The filter agglomerates then enter the crushing box 6 through the feeding pipe 7. After being crushed, the agglomerates in the crushing box 6 are returned to the discharge hopper 201 for secondary washing. Through mechanical linkage, the washing, filter pressing, and crushing processes are integrated into a single-power closed-loop system, solving the problems of traditional washing which only involves surface rinsing and has a high residual acid rate inside, as well as the increased energy consumption and time costs due to multi-process separation operations. This effectively improves the processing efficiency of lithium-ion batteries and reduces their processing costs.

[0077] Reference Figure 4 , Figure 5 and Figure 8As shown, in a preferred embodiment, based on the above method, a filter press assembly is further provided inside the filter cone 4. The filter press assembly includes a bracket 9 fixed on the frame 1, a drive motor 901 fixed on the bracket 9, an eccentric rod 902 connected to the output shaft of the drive motor 901, a rotating rod 903 connected to the other end of the eccentric rod 902 and coaxially arranged with the output shaft of the drive motor 901, and a spiral conveying plate 904 arranged on the rotating rod 903. The spiral conveying plate 904 rotates inside the filter cone 4, and the radius of the spiral conveying plate 904 gradually decreases from bottom to top as the filter cone 4 is formed. The drive motor 901 drives the rotating rod 903 to rotate through the eccentric rod 902, and the spiral conveying plate... The 904 spiral conveyor blades gradually decrease in diameter along the conical cylinder, creating a progressive extrusion space. The radius of the 904 spiral conveyor blades decreases from bottom to top, forming a gradient pressure zone with the inner wall of the conical cylinder, thus achieving dynamic pressure filtration. After washing, the mixture enters the bottom of the conical cylinder through the feed pipe 5, filling the gaps between the spiral conveyor blades 904. The rotating spiral blades push the material upward, generating radial extrusion force as the cross-sectional area of ​​the channel decreases. The acid solution is discharged through the filter holes along with the water. After dehydration, the material is discharged from the top of the conical cylinder through the feed pipe 7. It should be noted that a water collection tank can be set on the outside of the filter conical cylinder 4 to recycle the extruded liquid. This design solves the problem of high acid residue in the material during graphite regeneration through the synergistic effect of mechanical pressure gradient and spatial compression.

[0078] Reference Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, in a preferred embodiment, based on the above method, a connecting ring 9021 is further provided on the eccentric rod 902, a connecting rod 9022 is fixed on the connecting ring 9021, and a movable frame 9023 that slides on the frame 1 is movably connected to the end of the connecting rod 9022 away from the connecting ring 9021. A first rack plate 9024 and a second rack plate 9025 are provided on the movable frame 9023. A first one-way gear 9026 that meshes with the first rack plate 9024 and a second one-way gear 9027 that meshes with the second rack plate 9025 are provided on the mixing block 3.

[0079] Furthermore, the first one-way gear 9026 and the second one-way gear 9027 have the same size and structure, and the meshing distance between the first rack plate 9024 and the first one-way gear 9026 is greater than the meshing distance between the second rack plate 9025 and the second one-way gear 9027.

[0080] Specifically, the eccentric rod 902 drives the connecting rod 9022 to reciprocate through the connecting ring 9021, pushing the moving frame 9023 to slide linearly back and forth on the frame 1. Through an asymmetrical meshing design, the meshing stroke of the first rack plate 9024 and the first one-way gear 9026 is 20%-50% longer than that of the second set. When the moving frame 9023 slides, the long-stroke first rack plate 9024 drives the mixing block 3 to rotate forward, while the short-stroke second rack plate 9025 rotates in the opposite direction during the return stroke. When the moving frame 9023 moves to the right, the first rack plate 9024 meshes with the first one-way gear 9026, which drives the mixing block 3 to rotate counterclockwise. The meshing of the second rack plate 9025 with the second one-way gear 9027 does not drive the mixing block 3 to rotate. When frame 9023 moves to the left, the meshing of the first rack plate 9024 and the first one-way gear 9026 will not drive the mixing block 3 to rotate, while the meshing of the second rack plate 9025 and the second one-way gear 9027 will drive the mixing block 3 to rotate clockwise. Due to the large meshing distance between the first rack plate 9024 and the first one-way gear 9026, when the mixing block 3 rotates intermittently counterclockwise and clockwise relative to the washing tank 2, the final rotation direction of the mixing block 3 will still be slowly counterclockwise. This causes the graphite powder and water to slosh dynamically due to the reciprocating rotation of the mixing tank 301, making the graphite powder and water evenly mixed. The water can effectively wash the accumulated graphite powder, improve the acid precipitation rate, and solve the problem of water waste caused by repeated rinsing with a large amount of water in the static water washing of traditional technology.

[0081] It should be noted that the first one-way gear 9026 includes a fixed wheel 15 connected to the mixing block 3, a movable wheel 151 rotatably connected to the outside of the fixed wheel 15 and meshing with the first rack plate 9024, a receiving groove 152 opened in the fixed wheel 15, a locking tooth 153 rotatably connected to the receiving groove 152 via a rotating shaft and movingly abutting against the inner sidewall of the movable wheel 151, and a limiting groove 154 evenly opened in a circular pattern on the inner sidewall of the movable wheel 151. The locking tooth 153 and the limiting groove 154 are engaged and set to rotate. A second torsion spring is provided on the shaft for driving the tooth 153 to rotate back to its original position. When the movable wheel 151 meshes with the rack plate and rotates, if the inner wall of the movable wheel 151 presses against the tooth 153, the tooth 153 will retract into the receiving groove 152. At this time, the movable wheel 151 cannot drive the mixing block 3 to rotate through the fixed wheel 15. When the movable wheel 151 rotates, the inner wall does not press against the tooth 153, and the tooth 153 is engaged in the limiting groove 154. The rotation of the movable wheel 151 will drive the mixing block 3 to rotate through the fixed wheel 15.

[0082] Reference Figure 4 and Figure 7As shown, in a preferred embodiment, based on the above method, a movable plate 10 is slidably connected inside the mixing tank 301, and a first elastic element 1001 is provided between the movable plate 10 and the inner wall of the mixing tank 301. When the mixing tank 301 drives the graphite powder and water to sway, the graphite powder and water impact the movable plate 10, causing the movable plate 10 to elastically swing inside the mixing tank 301, expanding the volume of the mixing tank 301, so that the graphite powder and water have sufficient space to sway inside the mixing tank 301. The mixed materials form a vortex in the telescopic cavity, effectively flushing the dead corner acid in the graphite powder, further improving the rinsing effect on the graphite powder, and ensuring the quality of subsequent lithium battery processing.

[0083] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 8 , Figure 9 , Figure 10 and Figure 11 As shown, in a preferred embodiment, based on the above method, a crushing assembly is further provided at the crushing bin 6. The crushing assembly includes a swing plate 12 rotatably connected to the outside of the crushing bin 6 via a rotating rod. A first torsion spring for driving the swing plate 12 to reset and rotate is provided on the rotating rod. Movable holes 121 are provided on both sides of the swing plate 12. A positioning rod 122 is movably arranged in the movable hole 121. A lifting plate 123 is fixed on the positioning rod 122. The lifting plate 123 is connected to the crushing component via a connecting rod. The swing plate 12 achieves automatic reset through the rotating rod and the first torsion spring. The positioning rod 122 in the movable hole 121 drives the lifting plate 123 to form a vertical guiding motion.

[0084] Furthermore, the crushing component includes a movable rod 112 connected to the lifting plate 123 via a connecting rod, a movable ball 11 connected to the movable rod 112 and rotatably connected to the crushing box 6 via a pin, and a patting plate 111 connected to the end of the movable ball 11 away from the movable rod 112 and placed inside the crushing box 6.

[0085] An external drive device triggers the swing plate 12 to deflect, pushing the positioning rod 122 downward through the movable hole 121. The lifting plate 123 drives the movable ball 11 to rotate via the connecting rod and the movable rod 112. The patting plate 111 performs fan-shaped patting on the agglomerated graphite. The first torsion spring can drive the swing plate 12 to return to its original position when the swing plate 12 is not subjected to external force, preparing for the next crushing cycle. The patting plate 111 in the crushing box 6 pats at multiple positions, which increases the crushing speed of the graphite agglomerates, improves the uniformity of particle size, and enables the graphite powder to make uniform contact with water in the future, effectively removing residual acid in the graphite powder.

[0086] Reference Figure 1 , Figure 3 , Figure 4 and Figure 8As shown, in a preferred embodiment, based on the above method, a first connecting plate 13 is fixedly provided on the top of the rotating rod 903. The first connecting plate 13 is rotatably connected to a second connecting plate 131 via a pin. The first connecting plate 13 and the second connecting plate 131 form a hinge structure via the pin. A pull rope 132 is connected to the end of the second connecting plate 131 away from the first connecting plate 13. The pull rope 132 is made of high-strength nylon material with a tensile strength ≥800MPa and passes through the limiting seat 14 to form directional traction. The limiting seat 14 is provided with a polytetrafluoroethylene bushing or ball bearing to reduce the sliding friction coefficient of the pull rope 132. The end of the pull rope 132 away from the second connecting plate 131 is connected to the swing plate 12. Every time the rotating rod 903 rotates once, the circular motion is converted into the reciprocating swing motion of the swing plate 12 around the rotating rod through the connecting plate mechanism. The flexible pull rope 132 structure reduces energy consumption compared to the traditional linkage transmission.

[0087] This invention also discloses a method for regenerating graphite anode material for lithium-ion batteries, which involves processing the graphite using a lithium-ion battery anode material regeneration device, and includes the following steps:

[0088] S1: The pickled graphite powder is put into the feed hopper 201, and the flushing nozzle 8 sprays water into the feed hopper 201 to rinse the acid solution on the surface of the graphite powder.

[0089] S2: The drive motor 901 drives the moving frame 9023 to slide back and forth through the eccentric rod 902. The first rack plate 9024 of the moving frame 9023 meshes with the first one-way gear 9026, and the second rack plate 9025 meshes with the second one-way gear 9027. The first one-way gear 9026 and the second one-way gear 9027 are both one-way rotating gears.

[0090] When the moving frame 9023 moves to the right, the first rack plate 9024 meshes with the first one-way gear 9026, and the first one-way gear 9026 will drive the mixing block 3 to rotate counterclockwise. The meshing of the second rack plate 9025 with the second one-way gear 9027 will not drive the mixing block 3 to rotate.

[0091] When the moving frame 9023 moves to the left, the meshing of the first rack plate 9024 and the first one-way gear 9026 will not drive the mixing block 3 to rotate, while the meshing of the second rack plate 9025 and the second one-way gear 9027 will drive the mixing block 3 to rotate clockwise.

[0092] Because the meshing distance between the first rack plate 9024 and the first one-way gear 9026 is large, when the mixing block 3 rotates back and forth between counterclockwise and clockwise relative to the washing tank 2, the final rotation direction of the mixing block 3 will still slowly rotate counterclockwise.

[0093] S3: The graphite powder that has been rinsed for the first time in the hopper 201 will enter the mixing tank 301. As the mixing block 3 moves back and forth intermittently, and the movable plate 10 in the mixing tank 301 is supported by the first elastic element 1001, the graphite powder and water are repeatedly shaken in the tank.

[0094] S4: The washed graphite powder enters the filter cone 4 through the feed pipe 5. The spiral conveyor 904 rotates with the rotating rod 903, pushing the material from bottom to top. As the diameter of the filter cone 4 gradually decreases, the residual acid in the graphite powder is squeezed out with the water.

[0095] S5: The graphite powder agglomerates after pressure filtration enter the crushing box 6 through the feeding pipe 7. The rotating rod 903 intermittently pulls the pull rope 132 through the first connecting plate 13 and the second connecting plate 131. The pull rope 132 pulls the swing plate 12 to swing back and forth. The linkage lifting plate 123 drives the movable rod 112. The movable rod 112 drives the patting plate 111 to pat the graphite powder agglomerates through the movable ball 11. After the graphite powder agglomerates are broken, they fall back into the feed hopper 201 and are added to the washing step again.

[0096] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0097] The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A lithium ion battery negative electrode graphite regeneration device, comprising a rack (1) and a flushing nozzle (8) arranged on the rack (1), characterized in that, Also include: Water washing box (2) is arranged on the frame (1), its top is equipped with lower hopper (201), the water washing nozzle (8) water direction is toward the lower hopper (201); Mixing block (3) is rotatably arranged in the water washing box (2), for containing and shaking animal feed, the mixing block (3) is evenly provided with mixing groove (301) in the circumference; Filtering water conical cylinder (4) is arranged on the frame (1), and is communicated with the water washing box (2) through the lower feeding pipe (5), for extruding water in the material; The crushed material box (6) is arranged above the lower hopper (201), and is communicated with the filtering water conical cylinder (4) through the upper feeding pipe (7), for crushing the material agglomerate after pressure filtration; Wherein, the outlet of the crushed material box (6) is correspondingly arranged with the lower hopper (201) to make the crushed material return to the washing process.

2. The lithium ion battery negative electrode graphite regeneration apparatus according to claim 1, characterized in that, The filtering water conical cylinder (4) is provided with a pressure filtration assembly, comprising: Support (9) is fixed on the frame (1); Driving motor (901) is fixed on the support (9); Eccentric rod (902) is connected with the output shaft of the driving motor (901); Rotating rod (903) is connected with the other end of the eccentric rod (902) and is coaxially arranged with the output shaft of the driving motor (901); Spiral conveying piece (904) is arranged on the rotating rod (903) and rotates in the filtering water conical cylinder (4), and the radius thereof gradually decreases from bottom to top.

3. The lithium ion battery negative graphite regeneration apparatus of claim 2, wherein, The eccentric rod (902) is sleeved with a connecting ring (9021); Connecting rod (9022) is fixed at one end of the connecting ring (9021); Moving frame (9023) is slidably arranged on the frame (1) and movably connected with the other end of the connecting rod (9022); First rack plate (9024) and second rack plate (9025) are arranged on the moving frame (9023); First one-way gear (9026) and second one-way gear (9027) are arranged on both sides of the mixing block (3) and are engaged with the first rack plate (9024) and the second rack plate (9025) respectively.

4. The lithium ion battery negative graphite regeneration apparatus of claim 3, wherein, The size structure of the first one-way gear (9026) and the second one-way gear (9027) is the same, the meshing distance of the first rack plate (9024) and the first one-way gear (9026) is greater than the meshing distance of the second rack plate (9025) and the second one-way gear (9027).

5. The lithium ion battery negative graphite regeneration apparatus of claim 4, wherein, The first one-way gear (9026) comprises: Fixed wheel (15) is connected with the mixing block (3); Movable wheel (151) is rotatably connected to the outside of the fixed wheel (15) and is engaged with the first rack plate (9024); Accommodation groove (152) is arranged in the fixed wheel (15); Claw (153) is rotatably connected in the accommodation groove (152) and movably abuts with the inner wall of the movable wheel (151); Limiting groove (154) is evenly arranged on the inner wall of the movable wheel (151) and is matched with the claw (153); Second torsional spring is arranged on the shaft for driving the claw (153) to reset rotation.

6. The lithium ion battery anode graphite regeneration apparatus of claim 5, wherein, A movable plate (10) is slidably connected in the mixing tank (301), and a first elastic element (1001) is arranged between the movable plate (10) and the inner wall of the mixing tank (301).

7. The lithium ion battery anode graphite regeneration apparatus of claim 6, wherein, The material crushing assembly is arranged on the material crushing box (6) and comprises: A swing plate (12) is rotatably connected to the outer side of the material crushing box (6) through a rotating rod; A first torsional spring is arranged on the rotating rod and used for driving the swing plate (12) to rotate back; A movable hole (121) is formed in the two sides of the swing plate (12); A positioning rod (122) is movably arranged in the movable hole (121); A lifting plate (123) is fixed to the positioning rod (122); A material crushing piece is connected to the lifting plate (123) through a connecting rod.

8. The lithium ion battery anode graphite regeneration apparatus of claim 7, wherein, The material crushing piece comprises: A movable rod (112) is connected to the lifting plate (123) through a connecting rod; A movable ball (11) is rotatably connected to the material crushing box (6) through a pin shaft and connected to the movable rod (112); A material beating plate (111) is arranged in the material crushing box (6) and connected to the end of the movable ball (11) away from the movable rod (112).

9. The lithium ion battery anode graphite regeneration apparatus of claim 8, wherein, A first connecting plate (13) is fixed to the top of the rotating rod (903); A second connecting plate (131) is rotatably connected to the first connecting plate (13) through a pin shaft; A pull rope (132) is connected to the end of the second connecting plate (131) away from the first connecting plate (13) and connected to the swing plate (12) at the other end; A limiting seat (14) is fixed to the feeding pipe (7) and slidably matched with the pull rope (132).

10. A method for regenerating a lithium-ion battery anode graphite by using the lithium-ion battery anode graphite regeneration device according to claim 9, characterized in that, The method comprises the following steps: S1: The acid-washed graphite powder is put into the discharging hopper (201), and the flushing nozzle (8) sprays water to the discharging hopper (201) to flush the acid liquid on the surface of the graphite powder; S2: The driving motor (901) drives the moving frame (9023) to reciprocate through the eccentric rod (902), the first rack plate (9024) of the moving frame (9023) is engaged with the first one-way gear (9026), the second rack plate (9025) is engaged with the second one-way gear (9027), and the first one-way gear (9026) and the second one-way gear (9027) are both one-way rotating gears; When the moving frame (9023) moves to the right, the first rack plate (9024) is engaged with the first one-way gear (9026), the first one-way gear (9026) drives the mixing block (3) to rotate counterclockwise, and the engagement between the second rack plate (9025) and the second one-way gear (9027) does not drive the mixing block (3) to rotate; When the moving frame (9023) moves to the left, the engagement between the first rack plate (9024) and the first one-way gear (9026) does not drive the mixing block (3) to rotate, and the engagement between the second rack plate (9025) and the second one-way gear (9027) drives the mixing block (3) to rotate clockwise; Because the distance of the engagement between the first rack plate (9024) and the first one-way gear (9026) is longer, when the mixing block (3) intermittently reciprocates counterclockwise and clockwise relative to the water washing box (2), the final rotation direction of the mixing block (3) will still slowly rotate counterclockwise; S3: The first time the graphite powder in the hopper (201) is washed and enters the mixing tank (301), with the intermittent movement of the mixing block (3) and the movable plate (10) in the mixing tank (301) supported by the first elastic element (1001), the graphite powder and water in the tank are repeatedly shaken; S4: The water-washed graphite powder enters the filter cone (4) through the discharge pipe (5), the spiral conveying piece (904) rotates with the rotating rod (903), and the material is pushed from bottom to top, because the diameter of the filter cone (4) is gradually reduced, the residual acid liquid in the graphite powder is squeezed out with the water; S5: The pressed graphite powder is fed into the crushing box (6) through the feeding pipe (7), the rotating rod (903) intermittently pulls the pull rope (132) through the first connecting plate (13) and the second connecting plate (131), the pull rope (132) reciprocatingly drives the swing plate (12), the linkage lifting plate (123) drives the movable rod (112), the movable rod (112) drives the beating plate (111) to beat the graphite powder through the movable ball (11), and the graphite powder is crushed and falls back into the hopper (201) to join the washing step again.

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