Grinding and separating device for positive plate material

Abstract

The utility model relates to a grinding and separating device for a positive plate material. The grinding and separating device is characterized in that a shell is provided with a feeding hole and a discharging hole; the conveying belt is arranged in the shell; the transmission wheel assembly is arranged at the end of the inner side of the conveying belt, and the conveying belt is driven to move through the transmission wheel assembly; the roll shaft is arranged above the conveying belt and is connected with the shell; the supporting shaft is arranged below the conveying belt and connected with the shell, and the roller shaft and the supporting shaft clamp the conveying belt, so that the conveying belt drives the roller shaft and the supporting shaft to rotate; the pressure spring is arranged at the end part of the roller shaft, is connected with the roller shaft and provides pressure vertical to the direction of the conveying belt for the roller shaft; the motor is arranged on the side face of the transmission wheel assembly and connected with the transmission wheel assembly. According to the utility model, the motor drives the conveyor belt to move, and the roll shaft and the supporting shaft clamp the conveyor belt and drive the roll shaft to rotate, so that a positive plate material entering from the feed port is rolled by the roll shaft, and effective separation of a positive plate and positive powder is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery recycling, in particular to a rolling and separation device for positive electrode sheet materials. Background Art

[0002] As a green and environmentally friendly new energy, lithium batteries have been involved in many fields such as solar power stations, special aerospace equipment, and new energy vehicles due to their advantages such as no memory effect, light weight, and better discharge performance. Their application areas are becoming more and more extensive. With the increase in usage, the amount of scrapped and recycled batteries has increased year by year. In addition, since the structure of lithium batteries generally includes a shell, a positive electrode sheet, a negative electrode sheet, an electrolyte, and a diaphragm, and the positive electrode powder in the positive electrode sheet has a high economic value, how to highly separate the positive electrode powder from the aluminum foil in the positive electrode sheet is the top priority for recycling the positive electrode powder.

[0003] In the prior art, organic solvent dissolution or high-temperature calcination is often used to remove the binder between the positive electrode sheet and the positive electrode powder, and then the positive electrode powder is separated from the aluminum foil by rod milling. For example, patent CN115784192B discloses a method for recovering positive electrode powder of a lithium iron phosphate battery. The positive electrode sheet after oxygen-consuming heat treatment is cooled to room temperature and then mechanically collided and rubbed by a rod mill for 10 minutes to obtain lithium iron phosphate positive electrode powder and aluminum foil. However, the processing time of the rod mill is relatively long, which cannot meet the continuity of separation of the positive electrode powder and the aluminum foil on the assembly line. In addition, the rod mill is prone to damage the aluminum foil, thereby affecting the separation effect between the positive electrode powder and the aluminum foil.

[0004] Therefore, the technical problems existing in the above-mentioned prior art need to be solved urgently. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a rolling and separation device for positive electrode sheet materials, which solves the technical problems in the prior art that the positive electrode sheet materials need to be processed by a rod mill, and the processing time of the rod mill is relatively long, which cannot meet the continuity of the separation of the positive electrode powder and the aluminum foil on the assembly line, and the rod mill is prone to cause damage to the aluminum foil, thereby affecting the separation effect between the positive electrode powder and the aluminum foil.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0009] The utility model discloses a device for rolling and separating positive electrode sheet materials, comprising: a shell body, provided with a feed port and a discharge port; a conveyor belt, arranged inside the shell body; a transmission wheel assembly, arranged at the inner end of the conveyor belt, and driving the conveyor belt to move through the transmission wheel assembly; a roller shaft, arranged above the conveyor belt and connected to the shell body; a supporting shaft, arranged below the conveyor belt and connected to the shell body, and the roller shaft and the supporting shaft clamp the conveyor belt; a compression spring, arranged at the end of the roller shaft and connected to the roller shaft, thereby providing the roller shaft with pressure perpendicular to the direction of the conveyor belt; and a motor, arranged on the side of the transmission wheel assembly and connected to the transmission wheel assembly.

[0010] Optionally, the transmission wheel assembly includes: a driving wheel, which is arranged on the side of the motor and connected to the motor and the transmission belt; and a driven wheel, which is arranged below the feed port and connected to the transmission belt.

[0011] Optionally, the surface of the roller is provided with spiral ring patterns.

[0012] Optionally, the processing depth of the spiral ring pattern is 3mm-6mm.

[0013] Optionally, the angle between the projection line of the spiral direction of the spiral ring pattern on the horizontal plane and the axial line of the roller shaft is 75°-115°.

[0014] Optionally, there are multiple rollers, and the spiral directions of the spiral ring patterns of the multiple rollers are different.

[0015] Optionally, the spiral directions of the spiral ring patterns of every two adjacent roller shafts are different.

[0016] Optionally, a fan is arranged inside the conveyor belt.

[0017] Optionally, a protection strip is provided at the upper edge of the conveyor belt.

[0018] (III) Beneficial effects

[0019] The beneficial effects of the utility model are:

[0020] The utility model provides a device for crushing and separating positive electrode sheet materials, including a shell, a feed port, a discharge port, a conveyor belt, a transmission wheel assembly, a roller shaft, a support shaft, a clamping spring and a motor. In this arrangement, the motor drives the transmission assembly to move, and then the transmission assembly drives the conveyor belt to move. Since the roller shaft and the support shaft clamp the conveyor belt, the conveyor belt drives the roller shaft and the support shaft to rotate. When the positive electrode sheet material moves from the feed port to fall onto the conveyor belt and then passes through the roller shaft, the clamping spring provides downward pressure and the support shaft provides support, so that the positive electrode sheet material is crushed by the roller shaft and the conveyor belt. The compression spring can undergo elastic deformation upwards. Therefore, during the rolling process, when encountering foreign matter or a large amount of positive electrode sheet material accumulation, the roller is lifted, and the compression spring is lifted and elastically deformed. After the foreign matter or the accumulated positive electrode sheets have passed, the compression spring recovers its deformation, and the rolling and separation device continues to operate normally. It will not get stuck due to the small gap between the roller and the conveyor belt, thereby causing the production line to stagnate. After the positive electrode sheet material is rolled by the roller, the positive electrode sheet is separated from the positive electrode powder, and the separated positive electrode sheet and positive electrode powder are discharged through the discharge port, ultimately achieving effective separation of the positive electrode sheet and the positive electrode powder attached to the positive electrode sheet in the positive electrode sheet material.

[0021] Furthermore, the motor drives the driving wheel, the driving wheel drives the transmission belt, and the transmission belt drives the driven wheel, thereby realizing the transmission of power. On the one hand, only one motor is provided to drive the transmission belt to move, so that the positive electrode sheet material entering from the feed port is automatically transmitted. At the same time, on the other hand, the power is transmitted to the roller and the support shaft through the transmission belt, thereby realizing the rolling of the positive electrode sheet material on the transmission belt. The two functions of transmission and rolling of the positive electrode sheet material are realized by one motor, saving power energy. In addition, since the roller itself has no power, the plane shear force of the roller is reduced, which can effectively prevent the roller from damaging the positive electrode sheet and ensure the integrity of the positive electrode sheet.

[0022] Furthermore, by providing a spiral ring pattern, the positive electrode sheet material can be flipped during the rolling process by the roller, that is, the side of the positive electrode sheet material that was originally facing upward becomes the side facing downward as the roller rotates, so that the positive electrode powder attached to the positive electrode sheet material is effectively rolled, thereby achieving effective separation of the positive electrode sheet and the positive electrode powder.

[0023] Furthermore, by setting the processing depth of the spiral ring pattern, when the roller is rolling the positive electrode sheet material, the positive electrode powder is separated and scattered from the positive electrode sheet according to the set depth, thereby increasing the rolling and separation effect of the positive electrode sheet material.

[0024] Furthermore, by setting the angle between the projection line of the spiral direction of the spiral ring pattern on the horizontal plane and the axial line of the roller, due to the different spiral directions of multiple rollers, during the process of the roller rolling the positive electrode sheet material, the positive electrode sheet material is rolled by lateral forces in different directions and is divided by the spiral ring patterns in different directions, thereby increasing the rolling and separation effect.

[0025] Furthermore, by arranging a fan so that the air outlet of the fan faces the conveyor belt and is close to the two side walls of the shell, a wind wall is formed, so that the positive electrode sheet material is always kept within the effective rolling range of the roller during the process of being rolled and separated on the conveyor belt, and will not fall into the gap between the conveyor belt and the shell.

[0026] Furthermore, the setting of the protective strip ensures that the separated positive electrode sheets and positive electrode powder will not fall into the gap between the conveyor belt and the shell on the one hand, and on the other hand, the separated positive electrode sheets and positive electrode powder are gathered to the middle of the conveyor belt to facilitate entering the discharge port.

[0027] In summary, the utility model provides a device for rolling and separating positive electrode sheet materials, which drives the conveyor belt to move through a motor, and the roller and the supporting shaft clamp the conveyor belt to drive the roller to rotate. The roller itself is set to have no power in order to reduce the planar shear force of the roller, avoid damage to the positive electrode sheet material during the rolling process, protect the integrity of the positive electrode sheet appearance, avoid the broken fragments of the positive electrode sheet from being mixed into the positive electrode powder, and thus ensure the separation effect of the positive electrode sheet and the positive electrode powder, and by setting a plurality of rollers with spiral ring patterns, the positive electrode sheet material is repeatedly turned over during the rolling process, ensuring that the positive electrode powder attached to both sides of the positive electrode sheet material is rolled by the roller, and by setting the processing depth, processing angle and spiral direction, the rolling angle, rolling depth and rolling direction of the roller on the positive electrode sheet material are controlled, thereby increasing the rolling effect of the roller on the positive electrode sheet material, and ensuring the effective separation of the positive electrode sheet and the positive electrode powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the rolling and separation device of the positive electrode sheet material of the utility model;

[0029] Figure 2 The rolling and separation device for positive electrode material is along Figure 1 The cross-sectional view in the AA direction;

[0030] Figure 3 It is a structural schematic diagram of another angle of the rolling and separation device of the positive electrode sheet material of the utility model;

[0031] Figure 4 This is a structural schematic diagram of another angle of the rolling and separation device for positive electrode sheet materials of the utility model;

[0032] Figure 5 This is a structural schematic diagram of the positive electrode sheet material rolling and separation device of the utility model from another angle.

[0033] [Description of Reference Numerals]

[0034] 1. Feed port; 2. Driving wheel; 3. Driven wheel; 4. Conveyor belt; 5. Roller; 6. Support shaft; 7. Compression spring; 8. Fan; 9. Discharge port; 10. Motor; 11. Protection strip; 12. Housing. DETAILED DESCRIPTION

[0035] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0036] This embodiment provides a device for rolling and separating positive electrode sheet materials, such as Figures 1 to 5 As shown, it includes: a shell body, which is provided with a feed port and a discharge port; a conveyor belt, which is arranged inside the shell body; a driving wheel assembly, which is arranged at the inner end of the conveyor belt, and drives the conveyor belt to move through the driving wheel assembly; a roller shaft, which is arranged above the conveyor belt and connected to the shell body; a supporting shaft, which is arranged below the conveyor belt and connected to the shell body, and the roller shaft and the supporting shaft clamp the conveyor belt, so that the conveyor belt drives the roller shaft and the supporting shaft to rotate; a compression spring, which is arranged at the end of the roller shaft and connected to the roller shaft, so as to provide the roller shaft with pressure perpendicular to the direction of the conveyor belt; a motor, which is arranged on the side of the driving wheel assembly and connected to the driving wheel assembly, so as to provide power to the driving wheel assembly.

[0037] In the present embodiment, the positive electrode sheet material crushing and separation device drives the transmission component to move through the motor, and then drives the conveyor belt to move through the transmission component. Since the roller and the support shaft clamp the conveyor belt, the conveyor belt drives the roller and the support shaft to rotate. When the positive electrode sheet material enters the feed port and falls onto the conveyor belt, and then passes through the roller, the compression spring provides a downward pressure of 20Pa-100Pa, and the support shaft provides support, so that the positive electrode sheet material is crushed by the roller and the conveyor belt. After crushing, the positive electrode sheet is separated from the positive electrode powder, and the separated material is discharged through the discharge port, finally realizing the effective separation of the positive electrode sheet and the positive electrode powder in the positive electrode sheet material.

[0038] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0039] Example:

[0040] The embodiment of the utility model provides a rolling and separation device for positive electrode sheet materials, such as Figures 1 to 5 As shown, it includes: a shell 12, which is provided with a feed port 1 and a discharge port 9; a conveyor belt 4, which is arranged inside the shell 12; a transmission wheel assembly, which is arranged at the inner end of the conveyor belt 4, and drives the conveyor belt 4 to move through the transmission wheel assembly; a roller 5, which is arranged above the conveyor belt 4 and is connected to the shell 12; a support shaft 6, which is arranged below the conveyor belt 4 and is connected to the shell 12, and the roller 5 and the support shaft 6 clamp the conveyor belt 4, so that the conveyor belt 4 drives the roller 5 and the support shaft 6 to rotate; a compression spring 7, which is arranged at the end of the roller 5 and is connected to the roller 5, so as to provide the roller 5 with a pressure perpendicular to the direction of the conveyor belt 4; a motor 10, which is arranged on the side of the transmission wheel assembly and is connected to the transmission wheel assembly, so as to provide power for the transmission wheel assembly.

[0041] The positive electrode sheet material crushing and separation device in this embodiment drives the transmission component to move through the motor 10, and then drives the conveyor belt 4 to move through the transmission component. Since the roller 5 and the support shaft 6 clamp the conveyor belt 4, the conveyor belt 4 drives the roller 5 and the support shaft 6 to rotate. When the positive electrode sheet material moves into the feed port 1 and falls onto the conveyor belt 4, and then passes through the roller 5, the clamping spring 7 provides downward pressure and the support shaft 6 provides support, so that the positive electrode sheet material is crushed by the roller 5 and the conveyor belt 4. After crushing, the positive electrode sheet is separated from the positive electrode powder, and the separated material is discharged through the discharge port 9, finally realizing the effective separation of the positive electrode sheet and the positive electrode powder in the positive electrode sheet material.

[0042] Exemplarily, the pressure of the compression spring can be adjusted according to actual needs and is not limited to 20Pa-100Pa in this embodiment.

[0043] Exemplarily, the diameter of the roller is 30 mm-50 mm.

[0044] In a possible embodiment, Figure 2 As shown, the transmission wheel assembly includes: a driving wheel 2, which is arranged on the side of the motor 10 and connected to the motor 10 and the transmission belt 4; a driven wheel 3, which is arranged below the feed port 1 and connected to the transmission belt 4.

[0045] Exemplarily, the motor 10 drives the driving wheel 2, the driving wheel 2 drives the transmission belt 4, and the transmission belt 4 drives the driven wheel 3, thereby realizing the transmission of power. On the one hand, only by setting up a motor 10, the transmission belt is driven to move, so that the positive electrode sheet material entering from the feed port 1 is automatically transmitted. At the same time, on the other hand, the power is transmitted to the roller 5 and the support shaft 6 through the transmission belt 4, thereby realizing the rolling of the positive electrode sheet material on the transmission belt 4. The two functions of transmission and rolling of the positive electrode sheet material are realized by a motor 10, saving power energy. In addition, since the roller 5 itself has no power, the plane shear force of the roller 5 is reduced, which can effectively prevent the roller 5 from damaging the positive electrode sheet and ensure the integrity of the positive electrode sheet.

[0046] In a possible embodiment, Figure 1 , Figure 3 As shown, the surface of the roller shaft 5 is provided with spiral ring patterns.

[0047] Illustratively, by providing the rotating ring pattern, the positive electrode sheet material can be flipped during the rolling process by the roller 5, that is, the side of the positive electrode sheet material that was originally facing upward becomes the side facing downward as the roller 5 rotates, so that the positive electrode powder attached to both sides of the positive electrode sheet is effectively rolled, thereby achieving effective separation of the positive electrode sheet and the positive electrode powder.

[0048] In a possible embodiment, the processing depth of the spiral ring pattern is 3 mm-6 mm.

[0049] For example, by setting the processing depth of the spiral ring pattern to 5 mm, when the roller 5 is rolling the positive electrode sheet material, the positive electrode powder is separated and scattered from the positive electrode sheet along with the set depth, thereby increasing the rolling and separation effect of the positive electrode sheet material.

[0050] In a possible embodiment, the angle between the projection line of the spiral direction of the spiral ring pattern on the horizontal plane and the axial line of the roller 5 is 75°-115°. There are multiple rollers 5, and the spiral directions of the spiral ring patterns of the multiple rollers 5 are different.

[0051] Exemplarily, by setting the angle between the projection line of the spiral direction of the spiral ring pattern on the horizontal plane and the axial line of the roller 5 to 100°, since the spiral directions of the multiple rollers 5 are different, during the process of the roller 5 rolling the positive electrode sheet material, the positive electrode sheet material is rolled by lateral forces in different directions and divided by the spiral ring patterns in different directions. In addition, the rolling of multiple rollers 5 can make the positive electrode sheet material repeatedly flipped, that is, both sides of the positive electrode sheet will contact the roller 5 during the rolling process and be repeatedly rolled by the roller 5, thereby increasing the rolling and separation effect of the positive electrode sheet and the positive electrode powder.

[0052] In a possible embodiment, Figure 1 , Figure 3 As shown, the spiral directions of the spiral ring patterns of every two adjacent roller shafts 5 are different.

[0053] Exemplarily, for ease of description, the roller 5 closest to the feed port 1 is set as the first roller 5. In this embodiment, a total of four rollers 5 are set. As the distance from the feed port 1 increases, the second roller 5, the third roller 5 and the fourth roller 5 are arranged in sequence. The spiral direction of the spiral ring pattern of the first roller 5 is inclined toward the side where the motor 10 is arranged, the spiral direction of the spiral ring pattern of the second roller 5 is inclined toward the side where the motor 10 is not arranged, the spiral direction of the spiral ring pattern of the third roller 5 is inclined toward the side where the motor 10 is arranged, and the spiral direction of the spiral ring pattern of the fourth roller 5 is inclined toward the side where the motor 10 is not arranged. By alternating the spiral directions of the spiral ring patterns of the rollers 5, the positive electrode powder on the positive electrode sheet can be repeatedly crushed by forces from different directions, thereby increasing the crushing and separation effect.

[0054] Exemplarily, the distance between the axes of every two adjacent rollers is 120 mm-170 mm.

[0055] Exemplarily, the number of rollers 5 can also be set to 6, 8 or 10, etc., and the number of rollers 5 is an even number. After the positive electrode sheet material is rolled and separated, the rolling pressure is relatively uniform, which is beneficial to maintaining the integrity of the positive electrode sheet's appearance, making it less prone to damage and ensuring the separation effect between the positive electrode sheet and the positive electrode powder.

[0056] For example, according to actual needs, 5, 7 or 9 rollers 5 can be set. The number of rollers 5 is an odd number, which can also achieve effective separation of the positive electrode sheet and the positive electrode powder. Therefore, the specific number of rollers 5 is not limited and can be set according to actual needs.

[0057] In a possible embodiment, Figure 2 As shown, the fan 8 is arranged inside the conveyor belt 4 to provide wind force for the side of the conveyor belt 4.

[0058] Exemplarily, by arranging the fan 8 so that the air outlet of the fan 8 faces the two side walls of the conveyor belt 4 close to the shell 12, a wind wall is formed, so that the positive electrode sheet material is always kept within the effective rolling range of the roller 5 during the process of being rolled and separated on the conveyor belt 4, and will not fall into the gap between the conveyor belt 4 and the shell 12.

[0059] In a possible embodiment, Figure 1 , Figure 3 As shown, the protection strip 11 is arranged at the upper edge of the conveyor belt 4 .

[0060] Exemplarily, the provision of the protection strip 11 ensures, on the one hand, that the separated positive electrode sheets and positive electrode powder will not fall into the gap between the conveyor belt 4 and the shell 12 , and on the other hand, enables the separated positive electrode sheets and positive electrode powder to gather to the middle of the conveyor belt 4 to facilitate entry into the discharge port 9 .

[0061] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In the present utility model, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0063] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A rolling and separation device for positive electrode sheet materials, characterized in that: include: The shell is provided with a feed inlet and a discharge outlet; A conveyor belt is arranged inside the housing; A transmission wheel assembly is arranged at the inner end of the conveyor belt, and drives the conveyor belt to move through the transmission wheel assembly; A roller shaft is arranged above the conveyor belt and connected to the shell; A supporting shaft is disposed below the conveyor belt and connected to the housing, and the roller shaft and the supporting shaft clamp the conveyor belt; A compression spring, arranged at the end of the roller shaft and connected to the roller shaft; The motor is arranged on the side of the transmission wheel assembly and connected to the transmission wheel assembly.

2. The rolling and separation device for positive electrode sheet materials according to claim 1, characterized in that: The transmission wheel assembly comprises: A driving wheel, arranged on the side of the motor and connected to the motor and the transmission belt; The driven wheel is arranged below the feeding port and connected with the conveying belt.

3. The rolling and separation device for positive electrode sheet materials according to claim 1, characterized in that: The surface of the roller is provided with spiral ring patterns.

4. The rolling and separation device for positive electrode sheet materials according to claim 3, characterized in that: The processing depth of the spiral ring pattern is 3mm-6mm.

5. The rolling and separation device for positive electrode sheet materials according to claim 3, characterized in that: The angle between the projection line of the spiral direction of the spiral ring pattern on the horizontal plane and the axial line of the roller shaft is 75°-115°.

6. The rolling and separation device for positive electrode sheet materials according to claim 5, characterized in that: There are multiple rollers, and the spiral directions of the spiral ring patterns of the multiple rollers are different.

7. The rolling and separation device for positive electrode sheet materials according to claim 6, characterized in that: The spiral directions of the spiral ring patterns of every two adjacent roller shafts are different.

8. The rolling and separating device for positive electrode sheet materials according to claim 1, characterized in that: Also includes: The fan is arranged inside the conveyor belt.

9. The rolling and separating device for positive electrode sheet materials according to any one of claims 1 to 8, characterized in that: Also includes: A protection strip is arranged at the upper edge of the conveyor belt.

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