Recycling device for echelon utilization of lithium power battery

Abstract

The invention relates to the technical field of lithium battery recovery, in particular to a lithium power battery echelon utilization recovery device which comprises a crushing bin and a pair of crushing rollers arranged in the crushing bin, crushing teeth are evenly arranged on the outer portions of the crushing rollers, and each crushing roller comprises an inner roller body and an outer roller rotationally arranged on the outer portion of the inner roller body in a sleeving mode. The inner roller body is arranged in the outer roller and fixed to the smashing bin, and the outer wall of the inner roller body is concaved inwards to form a receding pit. Mounting holes are formed in the side wall of the outer roller in a penetrating mode, the crushing teeth are elastically arranged in the mounting holes in the radial direction of the outer roller through first elastic elements, and the crushing teeth abut against the outer wall of the inner roller body under the elastic force of the first elastic elements. The crushing teeth can retract into the mounting holes of the outer roller of the crushing roller under the elastic force of the first elastic elements when moving to the receding concave positions, so that battery fragments attached to the crushing teeth and between the adjacent crushing teeth can be automatically cleaned, and the self-cleaning effect of the crushing roller in the crushing process is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery recycling, and in particular to a recycling device for cascade utilization of lithium power batteries. Background Art

[0002] With the rapid development of the electric vehicle market, the use of lithium-ion power batteries has increased dramatically. However, these batteries need to be properly handled after reaching the end of their service life. As an important part of the circular economy, the cascade utilization of lithium-ion power batteries aims to reuse retired lithium-ion power batteries in application scenarios with lower energy density requirements, such as energy storage systems, low-speed electric vehicles, etc. This process not only helps to extend the overall service life of the battery, but also reduces resource waste and environmental pollution.

[0003] For those lithium-powered batteries that are not suitable for reuse in low-energy density application scenarios after sorting, they need to be disassembled and recycled. At present, most of the domestic lithium-powered batteries are processed using double-roll crushers. This equipment uses two relatively rotating cylindrical crushing rollers to achieve physical crushing of the battery. In order to improve the crushing efficiency, the crushing rollers of existing double-roll crushers are usually designed with special crushing teeth. These crushing teeth can effectively convert mechanical energy into force, making the material easier to crush or shear.

[0004] Although the double-roll crusher performs well in the crushing process of lithium-powered batteries, there are still some problems in practical applications. In particular, during the crushing process, materials are easily left between adjacent crushing teeth, and these residues are difficult to clean up with conventional tools, which brings inconvenience to equipment maintenance. In order to solve the above problems, the present invention provides a self-cleaning lithium-powered battery recycling device for cascade utilization. Summary of the invention

[0005] The object of the present invention is to provide a recycling device for lithium power batteries for cascade utilization, so as to solve the problems raised in the above-mentioned background technology.

[0006] The present invention is achieved through the following technical solutions:

[0007] A recycling device for cascade utilization of lithium power batteries comprises a crushing bin and a pair of crushing rollers arranged in the crushing bin and having crushing teeth evenly arranged on the outside, each of the crushing rollers comprises an inner roller body and an outer roller rotatably sleeved on the outside of the inner roller body, the inner roller body is arranged in the outer roller and fixed to the crushing bin, the outer wall of the inner roller body is concave to form a retreat recess; a mounting hole is provided through the side wall of the outer roller, the crushing teeth are elastically arranged in the mounting hole along the radial direction of the outer roller through a first elastic element, and the crushing teeth abut against the outer wall of the inner roller body under the elastic force of the first elastic element.

[0008] Optionally, cleaning knives are elastically arranged in the mounting holes located on both sides of the crushing tooth via second elastic elements, and the cleaning knives abut against the side walls of the crushing tooth under the elastic force of the second elastic element.

[0009] Optionally, a rotatable friction reducing wheel is provided at one end of the crushing tooth placed inside the outer roller, and the crushing tooth is in rolling contact with the outer wall of the inner roller body through the friction reducing wheel.

[0010] Optionally, the interior of the crushing bin defines a feeding chamber and a crushing chamber which are arranged from top to bottom and interconnected, the pair of crushing rollers are arranged in the crushing chamber, the feeding chamber is in a conical structure with a larger top and a smaller bottom, the upper end of the feeding chamber forms an opening on the upper surface of the crushing bin, the lower end of the feeding chamber is connected to the crushing chamber, and a V-shaped guard plate with an opening facing downward is provided directly above the connection position between the feeding chamber and the crushing chamber.

[0011] Optionally, the recycling device for the cascade utilization of lithium power batteries also includes a screening bin arranged at the bottom of the crushing bin and connected to the inside of the crushing bin in the vertical direction, a rotatable filter screen is arranged in the screening bin, the filter screen is a conical structure with a larger top and a smaller bottom, and the upper end of the filter screen is open and faces the connecting position of the crushing bin and the screening bin.

[0012] Optionally, a partition plate in an annular structure is provided at the bottom of the screening bin, and the partition plate divides the interior of the screening bin into a liquid storage area and a solid storage area. The solid storage area is arranged around the liquid storage area, and the filter screen is arranged above the liquid storage area.

[0013] Optionally, a cover plate with an annular structure and movable vertically is provided above the filter screen, and a diameter of the cover plate is not less than a diameter of an opening at an upper end of the filter screen.

[0014] Optionally, an electric push rod for driving the cover plate to move vertically is provided between the cover plate and the screening bin, and a contact ring is rotatably connected to the side of the cover plate facing the filter screen, and the contact ring can fit with the upper edge of the filter screen when the cover plate moves downward.

[0015] Optionally, the crushing bin and the screening bin are connected in the vertical direction via a connecting pipe, and the outer diameter of the connecting pipe is smaller than the inner hole of the cover plate.

[0016] Optionally, a discharge port is provided on the side wall of the screening bin corresponding to the solid storage area, a drain pipe is provided at the bottom of the screening bin corresponding to the position of the liquid storage area, and a valve is provided on the drain pipe.

[0017] Compared with the prior art, the present invention provides a recycling device for lithium power batteries for cascade utilization, which has the following beneficial effects:

[0018] 1. The present invention provides a retreat recess on the inner roller body of the crushing roller, and elastically arranges the crushing teeth in the mounting hole through the first elastic element. When the crushing teeth move to the retreat recess, they will retract into the mounting hole of the outer roller of the crushing roller under the elastic force of the first elastic element, so that the battery fragments attached to the crushing teeth and between adjacent crushing teeth can be automatically cleaned off, thereby achieving the self-cleaning effect of the crushing roller during the crushing process;

[0019] 2. The present invention elastically arranges cleaning knives in the mounting holes on both sides of the crushing teeth through the second elastic element. When the crushing teeth move in the mounting holes, the cleaning knives can scrape off the battery fragments attached to the side walls of the crushing teeth, thereby improving the cleaning effect of the side walls of the crushing teeth;

[0020] 3. The present invention provides a rotatable friction-reducing wheel at one end of the crushing tooth placed inside the outer roller. The friction-reducing wheel can reduce the resistance when the outer roller and the inner roller body rotate relative to each other, and at the same time reduce the mutual wear between the crushing tooth and the inner roller body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure at point A;

[0023] Figure 3 It is a schematic diagram of the installation structure of two crushing rollers of the present invention;

[0024] Figure 4 It is a schematic diagram of the longitudinal section structure of the crushing roller of the present invention;

[0025] Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure at B;

[0026] Figure 6 It is a schematic diagram of the transverse section structure of the crushing roller of the present invention;

[0027] Figure 7 For the present invention Figure 6 A schematic diagram of the enlarged structure at C;

[0028] Figure 8 It is a schematic diagram of the structure of the crushing teeth of the present invention;

[0029] Fig. 9 It is a structural schematic diagram of the outer drum of the present invention;

[0030] Fig.10 It is a schematic structural diagram of the inner roller body of the present invention.

[0031] In the figure: 1. crushing bin; 2. inner roller body; 3. retreat depression; 4. outer roller; 5. mounting hole; 6. crushing teeth; 7. slider; 8. deep groove ball bearing; 9. first flange; 10. second flange; 11. bolt; 12. first motor; 13. second motor; 14. first elastic element; 15. second elastic element; 16. slide; 17. cleaning knife; 18. mounting groove; 19. anti-friction wheel; 20. feed chamber; 21. crushing chamber; 22. guard plate; 23. screening bin; 24. filter screen; 25. liquid storage area; 26. solid storage area; 27. partition plate; 28. cover plate; 29. ​​electric push rod; 30. thrust ball bearing; 31. contact ring; 32. connecting pipe; 33. discharge port; 34. drain pipe; 35. valve. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 creative work are within the scope of protection of the present invention.

[0033] Example: See Figures 1 to 10According to an embodiment of the present invention, a recycling device for cascade utilization of lithium power batteries is provided, which is used to crush discarded lithium power batteries that are not suitable for reuse in low energy density application scenarios after sorting. The recycling device for cascade utilization of lithium power batteries includes a crushing bin 1 and a pair of crushing rollers arranged in the crushing bin 1 and having crushing teeth 6 evenly arranged on the outside. Each crushing roller includes an inner roller body 2 and an outer roller 4 rotatably sleeved on the outside of the inner roller body 2. The inner roller body 2 is arranged in the outer roller 4 and fixed to the crushing bin 1. Both ends of the inner roller body 2 are rotatably connected to the outer roller 4 through deep groove ball bearings 8. One end of the inner roller body 2 is fixedly provided with a first flange 9 , the inner roller body 2 can be fixed to the outer roller 4 through the first flange 9, and the end of the outer roller 4 away from the first flange 9 is connected to the second flange 10 through the bolt 11. The first motor 12 is fixedly installed on the outside of the crushing bin 1, and the output shaft of the first motor 12 is fixedly connected to the second flange 10. The first motor 12 is used to drive the outer roller 4 to rotate. The outer wall of the inner roller body 2 is concave to form a retreat recess 3; the side wall of the outer roller 4 is provided with a mounting hole 5, and the crushing teeth 6 are elastically arranged in the mounting hole 5 along the radial direction of the outer roller 4 through the first elastic element 14. The crushing teeth 6 are in contact with the outer wall of the inner roller body 2 under the elastic force of the first elastic element 14. It can be understood that the first elastic element 14 can provide the crushing teeth 6 with an elastic force inward in the radial direction of the outer roller 4, so that the crushing teeth 6 keep in contact with the outer wall of the inner roller body 2 under normal conditions, and can be retracted into the mounting hole 5 when encountering the retreat recess 3.

[0034] When the recycling device for recycling lithium-powered batteries of the above structure is used for crushing, the outer roller 4 rotates around the inner roller body 2, and the first end of the crushing tooth 6 extends to the outside of the mounting hole 5 to squeeze and crush the battery. The second end of the crushing tooth 6 is in sliding or rolling contact with the outer wall of the inner roller body 2. When the second end of the crushing tooth 6 moves to the retreat recess 3 of the inner roller body 2, due to the presence of the retreat recess 3, the first end of the crushing tooth 6 will retract into the mounting hole 5 under the elastic force of the first elastic element 14. At this time, the battery fragments attached to the crushing teeth 6 and between adjacent crushing teeth 6 can be automatically cleaned up, thereby achieving the self-cleaning effect of the crushing roller.

[0035] In order to ensure that the crushing teeth 6 of the two crushing rollers can normally engage with each other to achieve the effect of crushing the battery, and at the same time facilitate the collection of the battery fragments cleaned up on the crushing teeth 6. In this embodiment, the retreat recess 3 is arranged downward when the inner roller body 2 is fixedly installed in the crushing bin 1. After such arrangement, only when the crushing tooth 6 moves to the lower part of the crushing roller will its first end retract into the mounting hole 5, so that the cleaned battery fragments can directly fall to the bottom of the crushing bin 1, and will not fall on other crushing teeth 6. At the same time, since the first end of the crushing tooth 6 can be kept outside the mounting hole 5 when moving to the side where the two crushing rollers face each other, it is ensured that the crushing teeth 6 of the two crushing rollers can normally engage with each other and achieve the effect of crushing the battery.

[0036] In this embodiment, the first elastic element 14 is a first spring, a slider 7 is fixedly provided on the crushing tooth 6, a slide groove 16 for slidingly cooperating with the slider 7 is provided on the outer drum 4 along its radial direction, and the first spring is arranged in the slide groove 16 and pressed against the slider 7. The crushing tooth 6 is slidably connected with the outer drum 4 along the radial direction of the outer drum 4 through the cooperation between the slider 7 and the slide groove 16, and the first spring provides the crushing tooth 6 with an elastic force inward along the radial direction of the outer drum 4.

[0037] In order to enable the second end of the crushing tooth 6 to smoothly transition between the outer wall of the inner roller body 2 and the retreat recess 3 , in this embodiment, the connection between the retreat recess 3 and the outer wall of the inner roller body 2 is connected by an arc transition connection.

[0038] In order to make the crushing teeth 6 of the two crushing rollers better bite together, the side wall of the crushing tooth 6 is usually set to an inclined surface. However, this will cause a gap between the crushing tooth 6 and the mounting hole 5 when it is extended and retracted, which will lead to an insufficient cleaning effect on the side wall of the crushing tooth 6. For this reason, in this exemplary embodiment, a cleaning knife 17 is elastically arranged in the mounting hole 5 located on both sides of the crushing tooth 6 through the second elastic element 15. The cleaning knife 17 always abuts against the side wall of the crushing tooth 6 under the elastic force of the second elastic element 15. When the crushing tooth 6 moves in the mounting hole 5, the cleaning knife 17 can scrape off the battery fragments attached to the side wall of the crushing tooth 6, thereby improving the cleaning effect on the side wall of the crushing tooth 6. Specifically, in this example, the second elastic element 15 is a second spring, and a mounting groove 18 for mounting the second spring and the cleaning knife 17 is provided on the outer drum 4. The second spring provides elastic force for the cleaning knife 17 so that the cleaning knife 17 abuts against the side wall of the crushing tooth 6.

[0039] In this exemplary embodiment, a rotatable friction reducing wheel 19 is provided at one end of the crushing tooth 6 placed inside the outer roller 4, and the crushing tooth 6 is in rolling contact with the outer wall of the inner roller body 2 through the friction reducing wheel 19. By providing the friction reducing wheel, the resistance when the outer roller 4 and the inner roller body 2 rotate relative to each other can be reduced, and the mutual wear between the crushing tooth 6 and the inner roller body 2 can be reduced.

[0040] In this exemplary embodiment, the interior of the crushing bin 1 defines a feed chamber 20 and a crushing chamber 21 which are arranged from top to bottom and are interconnected. A pair of crushing rollers are arranged in the crushing chamber 21. The feed chamber 20 is in a conical structure with a large top and a small bottom. The upper end of the feed chamber 20 forms an opening on the upper surface of the crushing bin 1. The lower end of the feed chamber 20 is connected to the crushing chamber 21. A V-shaped guard plate 22 with an opening facing downward is arranged directly above the connection position between the feed chamber 20 and the crushing chamber 21. With such an arrangement, the lithium power batteries to be recycled can be temporarily stored in the feed chamber 20, and gradually fall into the crushing bin 1 as the crushing process progresses. During the crushing process, the guard plate 22 can also prevent the battery fragments from splashing outward from the feed chamber 20, thereby improving the safety of the recycling device when in use. In addition, since the guard plate 22 is in a V-shaped structure with an opening facing downward, the lithium power batteries will not remain on the guard plate 22.

[0041] In this exemplary embodiment, the recycling device for the cascade utilization of lithium power batteries also includes a screening bin 23 arranged at the bottom of the crushing bin 1 and connected to the inside of the crushing bin 1 in the vertical direction. A rotatable filter screen 24 is arranged in the screening bin 23. The filter screen 24 is a conical structure with a large top and a small bottom. The upper end of the filter screen 24 is an opening and faces the connection position of the crushing bin 1 and the screening bin 23. In this way, the battery fragments mixed with electrolyte will fall into the filter screen 24 from the connection position between the crushing bin 1 and the screening bin 23. Then, the filter screen 24 is rotated, and the electrolyte in the battery fragments will be discharged from the mesh of the filter screen 24 under the action of centrifugal force, thereby realizing the solid-liquid separation of the lithium power battery after crushing, so as to separate the battery fragments and the electrolyte. It should be noted that in order to prevent the battery fragments from running out of the upper end opening of the filter screen 24, the rotation speed of the filter screen 24 should be reasonably controlled. In order to realize the rotation of the filter screen 24, in this example, the filter screen 24 is driven to rotate by a second motor 13, the shell of the second motor 13 is fixed to the outer bottom of the screening bin 23, and the output shaft of the second motor 13 extends into the screening bin 23 and is fixedly connected to the lower end of the filter screen 24.

[0042] In order to improve the utilization rate of the filter screen 24, in this exemplary embodiment, a partition plate 27 of an annular structure is provided at the bottom of the screening bin 23. The partition plate 27 divides the inside of the screening bin 23 into a liquid storage area 25 and a solid storage area 26. The solid storage area 26 is arranged around the liquid storage area 25, and the filter screen 24 is arranged above the liquid storage area 25. When the filter screen 24 is used to separate the solid and liquid of the crushed lithium power battery, the filter screen 24 rotates at a relatively low speed. At this time, the electrolyte in the battery fragments will be thrown out and enter the liquid storage area 25. When the electrolyte in the battery fragments is basically separated, the rotation speed of the filter screen 24 is increased, and the battery fragments are thrown out from the opening at the upper end of the filter screen 24 and fall into the solid storage area 26, so that the filter screen 24 can be quickly emptied for the next solid-liquid separation.

[0043] In this exemplary embodiment, a cover plate 28 having an annular structure and being movable in the vertical direction is disposed above the filter screen 24, and the diameter of the cover plate 28 is not less than the diameter of the opening at the upper end of the filter screen 24. By disposing the cover plate 28, during the rotation of the filter screen 24, the cover plate 28 can prevent the battery fragments from escaping from the opening at the upper end of the filter screen 24, and in addition, the inner hole of the cover plate 28 can provide an escape space for the battery fragments to fall from the connecting position of the crushing chamber 1 and the screening chamber 23 into the filter screen 24.

[0044] In this exemplary embodiment, an electric push rod 29 for driving the cover plate 28 to move vertically is provided between the cover plate 28 and the screening bin 23. The side of the cover plate 28 facing the filter screen 24 is rotatably connected to a contact ring 31 through a thrust ball bearing 30. The contact ring 31 can fit with the upper edge of the filter screen 24 when the cover plate 28 moves downward. With such an arrangement, when the cover plate 28 contacts the filter screen 24 through the contact ring 31, the resistance caused by the cover plate 28 to the rotation of the filter screen 24 can be reduced as much as possible, thereby ensuring the normal operation of the filter screen 24.

[0045] In this exemplary embodiment, the crushing bin 1 and the screening bin 23 are connected in the vertical direction through a connecting pipe 32, and the outer diameter of the connecting pipe 32 is smaller than the inner hole of the cover plate 28. The crushed battery fragments and electrolyte in the crushing bin 1 can be directly discharged into the filter screen 24 through the connecting pipe 32. The connecting pipe 32 not only provides a closed channel for the battery fragments and electrolyte to reach the filter screen 24 from the crushing bin 1, but also can seal the inner hole of the cover plate 28 to prevent the battery fragments in the filter screen 24 from running out of the inner hole of the cover plate 28 during the solid-liquid separation process.

[0046] In this exemplary embodiment, a discharge port 33 is provided on the side wall of the screening bin 23 corresponding to the solid storage area 26, and a drain pipe 34 is provided at the bottom of the screening bin 23 corresponding to the position of the liquid storage area 25, and a valve 35 is provided on the drain pipe 34. The operator can conveniently take out the battery fragments in the solid storage area 26 through the discharge port 33, and the electrolyte in the liquid storage area 25 can be released through the drain pipe 34.

[0047] Working principle: Put the discarded lithium power battery into the feed chamber 20, the battery slides into the crushing chamber 21 along the inner wall of the feed chamber 20, and falls between the two crushing rollers. The first motor 12 drives the outer drums 4 of the two crushing rollers to rotate in opposite directions (in Figure 1In the embodiment, the outer roller 4 of the crushing roller on the left rotates clockwise, and the outer roller 4 of the crushing roller on the right rotates counterclockwise. The battery is crushed and sheared under the extrusion of the crushing teeth 6 of the two crushing rollers. During the crushing process, the outer roller 4 rotates around the inner roller body 2, and the first end of the crushing tooth 6 extends to the outside of the mounting hole 5 for squeezing and crushing the battery. The second end of the crushing tooth 6 slides or rolls in contact with the outer wall of the inner roller body 2. When the second end of the crushing tooth 6 moves to the retreat depression 3 of the inner roller body 2, due to the existence of the retreat depression 3, the first end of the crushing tooth 6 will be retracted into the mounting hole 5 under the elastic force of the first elastic element 14. At this time, the battery fragments attached to the crushing tooth 6 and between the adjacent crushing teeth 6 can be automatically cleaned off, thereby achieving the self-cleaning effect of the crushing roller. At the same time, when the crushing tooth 6 moves in the mounting hole 5, the cleaning knife 17 can also scrape off the battery fragments attached to the side wall of the crushing tooth 6, thereby improving the cleaning effect of the side wall of the crushing tooth 6. After the battery is crushed, the battery fragments containing electrolyte enter the filter screen 24 in the crushing bin 1 through the connecting pipe 32 at the bottom of the crushing bin 1 for solid-liquid separation. During the solid-liquid separation, the cover plate 28 is driven downward by the electric push rod 29 to make the contact ring 31 at the bottom of the cover plate 28 fit with the upper edge of the filter screen 24, and then the second motor 13 is started. The second motor 13 drives the filter screen 24 to rotate, and the electrolyte in the battery fragments is discharged from the mesh of the filter screen 24 under the action of centrifugal force and then flows into the liquid storage area 25. When the electrolyte in the battery fragments is basically separated, the cover plate 28 is driven upward by the electric push rod 29 to open the opening at the upper end of the filter screen 24. Then, the second motor 13 is started again to use centrifugal force to throw the battery fragments out of the opening at the upper end of the filter screen 24 and drop them into the solid storage area 26, thereby realizing the solid-liquid separation after the lithium power battery is crushed. The operator can take out the battery fragments in the solid storage area 26 and the electrolyte in the liquid storage area 25 through the discharge port 33 and the discharge pipe 34 respectively.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A recycling device for recycling lithium power batteries, comprising a crushing chamber (1) and a pair of crushing rollers arranged in the crushing chamber (1) and having crushing teeth (6) evenly arranged on the outside, characterized in that: Each crushing roller comprises an inner roller body (2) and an outer roller (4) rotatably sleeved on the outside of the inner roller body (2); the inner roller body (2) is arranged in the outer roller (4) and fixed to the crushing bin (1); the outer wall of the inner roller body (2) is concave to form a retreat recess (3); a mounting hole (5) is provided through the side wall of the outer roller (4); the crushing teeth (6) are elastically arranged in the mounting hole (5) along the radial direction of the outer roller (4) through a first elastic element (14); and the crushing teeth (6) are in contact with the outer wall of the inner roller body (2) under the elastic force of the first elastic element (14).

2. The recycling device for lithium power battery recycling according to claim 1, characterized in that: Cleaning knives (17) are elastically arranged in the mounting holes (5) located on both sides of the crushing teeth (6) via second elastic elements (15); the cleaning knives (17) abut against the side walls of the crushing teeth (6) under the elastic force of the second elastic elements (15).

3. The recycling device for lithium power battery recycling according to claim 1, characterized in that: A rotatable friction reducing wheel (19) is provided at one end of the crushing tooth (6) disposed inside the outer roller (4), and the crushing tooth (6) is in rolling contact with the outer wall of the inner roller body (2) through the friction reducing wheel (19).

4. The recycling device for lithium power battery recycling according to claim 1, characterized in that: The interior of the crushing bin (1) defines a feeding chamber (20) and a crushing chamber (21) which are arranged from top to bottom and are interconnected. The pair of crushing rollers are arranged in the crushing chamber (21). The feeding chamber (20) is in a conical structure with a larger top and a smaller bottom. The upper end of the feeding chamber (20) forms an opening on the upper surface of the crushing bin (1). The lower end of the feeding chamber (20) is connected to the crushing chamber (21). A V-shaped guard plate (22) with an opening facing downward is provided directly above the connection position between the feeding chamber (20) and the crushing chamber (21).

5. The recycling device for lithium power battery recycling according to any one of claims 1 to 4, characterized in that: The invention also comprises a screening bin (23) which is arranged at the bottom of the crushing bin (1) and is connected to the inside of the crushing bin (1) in the vertical direction. A rotatable filter screen (24) is arranged in the screening bin (23). The filter screen (24) is of a conical structure with a larger upper part and a smaller lower part. The upper end of the filter screen (24) is open and faces the connecting position between the crushing bin (1) and the screening bin (23).

6. The recycling device for lithium power battery recycling according to claim 5, characterized in that: A partition plate (27) in an annular structure is arranged at the bottom of the screening bin (23), and the partition plate (27) divides the interior of the screening bin (23) into a liquid storage area (25) and a solid storage area (26). The solid storage area (26) is arranged around the liquid storage area (25), and the filter screen (24) is arranged above the liquid storage area (25).

7. The recycling device for lithium power battery recycling according to claim 6 is characterized in that: A cover plate (28) having an annular structure and being movable in the vertical direction is arranged above the filter screen (24); the diameter of the cover plate (28) is not less than the diameter of the upper opening of the filter screen (24).

8. The recycling device for lithium power battery recycling according to claim 7, characterized in that: An electric push rod (29) is provided between the cover plate (28) and the screening bin (23) for driving the cover plate (28) to move vertically. A contact ring (31) is rotatably connected to a side of the cover plate (28) facing the filter screen (24). The contact ring (31) can fit with the upper edge of the filter screen (24) when the cover plate (28) moves downward.

9. The recycling device for lithium power battery recycling according to claim 7, characterized in that: The crushing bin (1) and the screening bin (23) are connected in the vertical direction via a connecting pipe (32), and the outer diameter of the connecting pipe (32) is smaller than the inner hole of the cover plate (28).

10. The recycling device for lithium power battery recycling according to any one of claims 6 to 9, characterized in that: A discharge port (33) is provided on the side wall of the screening bin (23) corresponding to the solid storage area (26), and a drain pipe (34) is provided at the bottom of the screening bin (23) corresponding to the position of the liquid storage area (25), and a valve (35) is provided on the drain pipe (34).

Images