Recycling device for lithium iron phosphate pole piece of waste battery

Abstract

The utility model relates to a waste battery lithium iron phosphate pole piece recovery device which comprises a shell and further comprises a bearing body, a grinding cylinder and a transmission part, the bearing body is fixed in the shell, the middle of the bearing body is provided with an inverted-circular-truncated-cone-shaped through hole, the grinding cylinder is rotationally connected into the through hole, the upper side and the lower side of the bearing body are each provided with a driving ring connected with the grinding cylinder, and the transmission part is connected with the grinding cylinder. The transmission part comprises a rotating shaft and a rotating rod, the rotating shaft is connected to the middle of the bottom face of the grinding body, the rotating rod is rotationally connected to the bearing body on the left sides of the two driving rings, and the upper portion and the lower portion of the rotating rod are sleeved with gears; the two gears are meshed with the teeth on the driving rings on the same side respectively, and the rotating rod and the rotating shaft are driven by a first belt to rotate synchronously in the same direction; and a feeding hopper for feeding materials between the grinding cylinder and the grinding body is arranged at the top of the shell. The lithium iron phosphate pole piece grinding device solves the problem that a device for grinding a lithium iron phosphate pole piece is low in grinding efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of pole piece recycling, in particular to a recycling device for lithium iron phosphate pole pieces of waste batteries. Background Art

[0002] Lithium iron phosphate (LiFePO4) has the defect of poor intrinsic conductivity (about 10⁻ 9 S / cm) as the cathode material of lithium-ion batteries, and it is necessary to add a conductive agent to construct an electron transport network to reduce the internal resistance of the electrode. Due to its excellent conductive properties, the new two-dimensional material MXene shows the application potential of constructing a continuous conductive network in laboratory research. However, at present, limited by material costs and process maturity, its industrial application still needs to be broken through, and it is urgent to carry out research on the optimization of the composite process of MXene and electrode materials.

[0003] In terms of resource recycling, laboratories usually use waste lithium iron phosphate pole pieces. After grinding the pole piece materials by crushing and grinding, they are compounded with MXene to prepare a new electrode system, which not only reduces the raw material cost but also has significant environmental benefits. However, there are efficiency bottlenecks in existing crushing equipment. For example, the single grinding turntable device mentioned in the patent CN 219849784 U has a long grinding cycle for pole piece materials due to structural limitations, affecting the efficiency of obtaining waste lithium iron phosphate powder. Summary of the Utility Model

[0004] The utility model aims to solve the problem of slow grinding efficiency of the device for grinding lithium iron phosphate pole pieces; and provides a recycling device for lithium iron phosphate pole pieces of waste batteries, which can quickly obtain lithium iron phosphate powder.

[0005] To solve the above problems, the technical solution of the utility model is as follows:

[0006] A recycling device for lithium iron phosphate pole pieces of waste batteries includes a housing, and also includes a carrier, a grinding cylinder and a transmission member. The carrier is fixed in the housing, and a through hole in the shape of an inverted frustum is provided in the middle. A grinding cylinder is rotatably connected in the through hole. Driving rings for connecting the grinding cylinder are provided on both the upper and lower sides of the carrier. Tooth teeth are provided on the outer ring of the driving ring. A grinding body that gradually approaches the grinding cylinder from top to bottom is rotatably provided in the grinding cylinder. The transmission member includes a rotating shaft and a rotating rod. The middle of the bottom surface of the grinding body is connected with the rotating shaft. The rotating rod is rotatably connected to the carrier on the left side of the two driving rings. Gears are sleeved on the upper and lower parts of the rotating rod. The two gears are respectively meshed with the tooth teeth on the driving ring on the same side. The rotating rod and the rotating shaft are driven to rotate synchronously and in the same direction by a first belt; a feed hopper for feeding materials between the grinding cylinder and the grinding body is provided at the top of the housing.

[0007] Further, the grinding cylinder is a hollow frustum with a larger upper part and a smaller lower part and both ends open. The peripheral wall of the grinding cylinder is parallel to the peripheral wall of the through hole. The outer wall of the grinding cylinder contacts a plurality of first balls installed on the peripheral wall of the through hole. Both the top and bottom surfaces of the carrier are provided with second balls that contact the driving rings on the same side. A plurality of first protrusions are provided on the inner wall of the grinding cylinder. The grinding body is an inverted frustum, and a plurality of second protrusions are provided on the peripheral wall of the grinding body. A guiding frustum driven to rotate by a motor is connected to the top surface of the grinding body.

[0008] Further, the outer diameters of the two driving rings are equal. The left rotating rod and the two gears on the left are left driving components, and a right driving component symmetric to the left driving component is provided on the right part of the carrier.

[0009] Further, a pipe body is fixed inside the lower housing of the grinding body. The lower end of the rotating shaft extends into the pipe body. The rotating shaft is rotatably connected to the upper end of the peripheral wall of the pipe body. The lower ends of both rotating rods extend into the pipe body. A first belt is sleeved outside the left rotating rod and the rotating shaft together, and a second belt is sleeved outside the right rotating rod and the rotating shaft together. Both the first belt and the second belt are located inside the pipe body.

[0010] Further, the lower opening of the housing is blocked by a bottom plate. Support legs are arrayed on the outer bottom surface edge of the bottom plate of the housing. A first isolation cylinder is fixed on the inner top surface of the housing. The upper end of the grinding cylinder is in sliding contact with the first isolation cylinder. The feed hopper is located above the left part of the first isolation cylinder. A second isolation cylinder is provided inside the lower part of the housing. The lower end of the second isolation cylinder penetrates and is fixedly connected to the bottom plate of the housing. The lower end of the grinding cylinder is in sliding contact with the second isolation cylinder. Both ends of the pipe body penetrate the second isolation cylinder.

[0011] By the above technical solution, the beneficial effects of the present utility model are as follows:

[0012] When the motor of the present utility model drives the grinding body to rotate, through the transmission of the transmission components, the grinding cylinder can be made to rotate in the direction opposite to that of the grinding body, so that the lithium iron phosphate electrode sheet entering between the grinding cylinder and the grinding body is subjected to bidirectional forces, and the lithium iron phosphate electrode sheet can be ground into powder faster.

[0013] When the grinding cylinder of the present utility model rotates, under the combined action of the left driving component and the right driving component, the rotation of the grinding cylinder can be made more stable. Description of the Drawings

[0014] Figure 1 is the structural schematic diagram of the present utility model;

[0015] Figure 2 is the front sectional view of the present utility model;

[0016] Figure 3 is the structural schematic diagram of the carrier of the present utility model;

[0017] Figure 4 is the structural schematic diagram of the connection of the transmission components of the grinding cylinder of the present utility model.

[0018] The reference numerals in the drawings are: 1, housing; 2, carrier; 3, grinding cylinder; 4, through hole; 5, drive ring; 6, tooth; 7, grinding body; 8, rotating shaft; 9, rotating rod; 10, gear; 11, first round hole; 12, second round hole; 13, first bearing; 14, first ball; 15, second ball; 16, first protrusion; 17, second protrusion; 18, guiding frustum; 19, motor; 20, pipe body; 21, second belt; 22, first annular groove; 23, second annular groove; 24, third annular groove; 25, support leg; 26, first isolation cylinder; 27, second isolation cylinder; 28, feed hopper; 29, first belt; 30, second bearing. Specific embodiments

[0019] The present utility model will be further described below in conjunction with the drawings and specific embodiments:

[0020] As Figures 1 to 4 shown, a device for recycling lithium iron phosphate electrode sheets of waste batteries includes a housing 1, the housing 1 is a cylinder with an open lower end, and also includes a carrier 2, a grinding cylinder 3 and a transmission member. The carrier 2 is fixed inside the housing 1, and a through hole 4 in the shape of an inverted frustum is provided in the middle. A grinding cylinder 3 is rotatably connected inside the through hole 4. Drive rings 5 for connecting the grinding cylinder 3 are provided on both the upper and lower sides of the carrier 2. Teeth 6 are provided on the outer ring of the drive ring 5. The drive ring 5 is a toroidal body with an inner ring connected to the outer wall of the grinding cylinder 3. There is a distance between the outer ring of the drive ring 5 and the inner wall of the housing 1. A grinding body 7 that gradually approaches the grinding cylinder 3 from top to bottom is rotatably provided inside the grinding cylinder 3. The transmission member includes a rotating shaft 8 and a rotating rod 9. The middle of the bottom surface of the grinding body 7 is connected with a rotating shaft 8. The rotating rod 9 is rotatably connected to the carrier 2 on the left side of the two drive rings 5. Gears 10 are sleeved on the upper and lower parts of the rotating rod 9. The two gears 10 are respectively engaged with the teeth 6 on the same-side drive ring 5. The rotating rod 9 and the rotating shaft 8 are driven to rotate synchronously and in the same direction by a first belt 29. A feed hopper 28 for feeding materials between the grinding cylinder 3 and the grinding body 7 is provided at the top of the housing 1.

[0021] A first round hole 11 corresponding to the diameter of the rotating rod 9 is provided on the grinding body 7. First round holes 12 communicating with the first round hole 11 are provided on both the top surface and the bottom surface of the grinding body 7. The diameter of the second round hole 12 is larger than that of the first round hole 11. The upper and lower parts of the peripheral wall of the rotating rod 9 are connected to the second round hole 12 through a first bearing 13.

[0022] The grinding cylinder 3 is a hollow frustum with a larger upper part and a smaller lower part and both ends open. The peripheral wall of the grinding cylinder 3 is parallel to the peripheral wall of the through hole 4. The outer wall of the grinding cylinder 3 contacts a plurality of first balls 14 installed on the peripheral wall of the through hole 4. Both the top and bottom surfaces of the carrier 2 are provided with second balls 15 that contact the driving rings 5 on the same side. A plurality of first protrusions 16 are provided on the inner wall of the grinding cylinder 3. The grinding body 7 is an inverted frustum, and a plurality of second protrusions 17 are provided on the peripheral wall of the grinding body 7. The top surface of the grinding body 7 is connected to a guiding frustum 18 driven to rotate by a motor 19. The motor 19 is provided on the outer top surface of the housing 1, and the output end of the motor 19 penetrates through the top plate of the housing 1 and is connected to the guiding frustum 18.

[0023] The outer diameters of the two driving rings 5 are equal. The left rotating rod 9 and the two gears 10 are left driving components. A right driving component symmetric to the left driving component is provided on the right part of the carrier 2, and the left ends of the two gears 10 on the right driving component are respectively meshed with the teeth 6 at the right ends of the corresponding driving rings 5.

[0024] A pipe body 20 is fixed inside the housing 1 below the grinding body 7. The pipe body 20 is a circular pipe with both ends fixedly connected to the inner wall of the housing 1. The lower end of the rotating shaft 8 extends into the pipe body 20. The rotating shaft 8 is rotationally connected to the upper end of the peripheral wall of the pipe body 20 through a second bearing 30. The lower ends of the two rotating rods 9 both extend into the pipe body 20. A first belt 29 is sleeved outside the left rotating rod 9 and the rotating shaft 8 together, and a second belt 21 is sleeved outside the right rotating rod 9 and the rotating shaft 8 together. Both the first belt 29 and the second belt 21 are located inside the pipe body 20.

[0025] An annular groove one 22 is provided on the peripheral wall of each rotating rod 9 located inside the pipe body 20. An annular groove two 23 and an annular groove three 24 are provided on the peripheral wall of the rotating shaft 8 located inside the pipe body 20. The left part of the first belt 29 is sleeved outside the left part of the left annular groove one 22, and the right part is sleeved outside the right part of the annular groove two 23. The left part of the second belt 21 is sleeved outside the left part of the annular groove three 24, and the right part is sleeved outside the right part of the right annular groove one 22.

[0026] The lower end opening of the housing 1 is blocked by a bottom plate. Support legs 25 are arrayed on the outer bottom surface edge of the bottom plate of the housing 1. An isolation cylinder one 26 is fixed on the inner top surface of the housing 1. The upper end of the grinding cylinder 3 is in sliding contact with the isolation cylinder one 26. The feed hopper 28 is located on the upper side of the left part of the isolation cylinder one 26. An isolation cylinder two 27 is provided inside the lower part of the housing 1. The lower end of the isolation cylinder two 27 penetrates and is fixedly connected to the bottom plate of the housing 1. The lower end of the grinding cylinder 3 is in sliding contact with the isolation cylinder two 27. Both ends of the pipe body 20 penetrate the isolation cylinder two 27; the isolation cylinder one 26 and the isolation cylinder two 27 can prevent the lithium iron phosphate electrode sheets entering the housing from affecting the transmission of the left driving component and the right driving component.

[0027] During use, the motor 19 drives the grinding body 7 to rotate clockwise (the clockwise rotation of the grinding body 7 is Figure 2From the top-down perspective), lithium iron phosphate electrode sheets to be initially crushed are fed into the housing 1 through the feed hopper 28. Guided by the guiding frustum 18, the lithium iron phosphate electrode sheets enter between the grinding cylinder 3 and the grinding medium 7. When the grinding medium 7 rotates clockwise, the rotating shaft 8 rotates clockwise along with the grinding medium 7. Since the left side lever 9 is connected to the rotating shaft 8 through the first belt 29, the left side lever 9 rotates clockwise. The left side lever 9 drives the two gears 10 to rotate clockwise. The right ends of the two gears 10 drive the engaged driving ring 5 to rotate counterclockwise (the counterclockwise rotation of the driving ring 5 is Figure 2 From the top-down perspective). Similarly, the right side lever 9 rotates clockwise, the two gears 10 on the right side lever 9 rotate clockwise, and the left ends of the two right side gears 10 drive the engaged driving ring 5 to rotate counterclockwise. At this time, the grinding cylinder 3 rotates counterclockwise, and the left driving member and the right driving member synchronously drive the grinding cylinder 3 to rotate, which can ensure that both sides of the grinding cylinder 3 are evenly stressed and rotate stably. Therefore, since the grinding medium 7 rotates clockwise and the grinding cylinder 3 rotates counterclockwise, the lithium iron phosphate electrode sheets entering between the grinding medium 7 and the grinding cylinder 3 are stressed in both directions, and the lithium iron phosphate electrode sheets can be ground into powder faster, improving the grinding efficiency of the lithium iron phosphate electrode sheets;

[0028] After the lithium iron phosphate electrode sheets are ground into powder by the grinding medium 7 and the grinding cylinder 3, they are discharged through the lower opening between the grinding medium 7 and the grinding cylinder 3 and enter the second isolation cylinder 27, and are discharged through the lower opening of the second isolation cylinder 27.

[0029] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Without departing from the spirit of the present invention, that is, within the scope of disclosure, any equivalent or equivalent deformation or substitution of the technical solutions of the present invention belongs to the protection scope of the present invention.

Claims

1. A recycling device for lithium iron phosphate electrode sheets of waste batteries, comprising a housing (1), characterized in that, It further includes a carrier (2), a grinding cylinder (3) and a transmission member. The carrier (2) is fixed inside the housing (1), and a through hole (4) in the shape of an inverted frustum is provided in the middle. A grinding cylinder (3) is rotatably connected inside the through hole (4). Driving rings (5) for connecting the grinding cylinder (3) are provided on both the upper and lower sides of the carrier (2). Teeth (6) are provided on the outer ring of the driving ring (5). A grinding body (7) that gradually approaches the grinding cylinder (3) from top to bottom is rotatably provided inside the grinding cylinder (3). The transmission member includes a rotating shaft (8) and a rotating rod (9). The middle of the bottom surface of the grinding body (7) is connected to the rotating shaft (8). The rotating rod (9) is rotatably connected to the carrier (2) on the left side of the two driving rings (5). Gears (10) are sleeved on the upper and lower parts of the rotating rod (9). The two gears (10) are respectively engaged with the teeth (6) on the driving ring (5) on the same side. The rotating rod (9) and the rotating shaft (8) are driven to rotate synchronously and in the same direction by a first belt (29). A feed hopper (28) for feeding between the grinding cylinder (3) and the grinding body (7) is provided at the top of the housing (1).

2. The recycling device for lithium iron phosphate electrode sheets of waste batteries according to claim 1, wherein The grinding cylinder (3) is a hollow frustum with a larger upper part and a smaller lower part and both ends open. The peripheral wall of the grinding cylinder (3) is parallel to the peripheral wall of the through hole (4). The outer wall of the grinding cylinder (3) is in contact with a plurality of first balls (14) installed on the peripheral wall of the through hole (4). Balls two (15) in contact with the driving ring (5) on the same side are provided on both the top and bottom surfaces of the carrier (2). A plurality of first protrusions (16) are provided on the inner wall of the grinding cylinder (3). The grinding body (7) is an inverted frustum. A plurality of second protrusions (17) are provided on the peripheral wall of the grinding body (7). The top surface of the grinding body (7) is connected to a guiding frustum (18) driven to rotate by a motor (19).

3. A lithium iron phosphate electrode sheet recycling device for waste batteries according to claim 1, characterized in that, The outer diameters of the two driving rings (5) are equal. The left rotating rod (9) and the two gears (10) are left driving members. A right driving member symmetric to the left driving member is provided on the right part of the carrier (2).

4. A recycling device for lithium iron phosphate electrode sheets of waste batteries according to claim 3, characterized in that, A tube body (20) is fixed inside the housing (1) below the grinding body (7). The lower end of the rotating shaft (8) extends into the tube body (20). The rotating shaft (8) is rotatably connected to the upper end of the peripheral wall of the tube body (20). The lower ends of the two rotating rods (9) both extend into the tube body (20). A first belt (29) is sleeved outside the left rotating rod (9) and the rotating shaft (8). A second belt (21) is sleeved outside the right rotating rod (9) and the rotating shaft (8). The first belt (29) and the second belt (21) are both located inside the tube body (20).

5. A recycling device for lithium iron phosphate electrode sheets of waste batteries according to claim 1, characterized in that, The lower opening of the housing (1) is blocked by a bottom plate. Support legs (25) are arrayed on the outer bottom surface edge of the bottom plate of the housing (1). An isolation cylinder one (26) is fixed on the inner top surface of the housing (1). The upper end of the grinding cylinder (3) is in sliding contact with the isolation cylinder one (26). The feed hopper (28) is located above the left part of the isolation cylinder one (26). An isolation cylinder two (27) is provided inside the lower part of the housing (1). The lower end of the isolation cylinder two (27) penetrates and is fixedly connected to the bottom plate of the housing (1). The lower end of the grinding cylinder (3) is in sliding contact with the isolation cylinder two (27). Both ends of the tube body (20) penetrate the isolation cylinder two (27).

Images