Separation device

Abstract

The utility model relates to the technical field of battery negative electrode material separation, and provides separation equipment which comprises a separation tank and a drum screen, preset liquid is arranged in the separation tank, the drum screen is obliquely arranged relative to the separation tank, the liquid level of the preset liquid is located between the feeding end and the discharging end of the drum screen in the height direction, and a battery negative electrode material enters the drum screen; and the electrode powder in the battery negative electrode material is diffused under the action of the preset liquid, and is separated into the separation tank from the screen holes of the drum screen. A blade unit is arranged in the drum screen, the drum screen rotates around the first rotating axis, and the blade unit can drive the negative pole pieces in the drum screen to be discharged from the discharging end. Therefore, the separation purity and the separation efficiency of the pole powder and the negative pole piece are improved, and the recycling rate of the pole powder and the negative pole piece can also be improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery negative electrode material separation, and in particular to a separation device. Background Art

[0002] With the continuous application of new energy batteries, more and more batteries have gradually begun to be eliminated. Researchers have also begun to study methods for recycling and reusing these eliminated batteries, especially the recycling of battery negative electrode materials.

[0003] In the prior art, the negative electrode sheet needs to be crushed and then subjected to processes such as vibration, blowing and screening to obtain electrode powder and crushed electrode sheets respectively.

[0004] However, the negative electrode material separated in the above manner may contain negative electrode sheet debris in the electrode powder, resulting in a reduced recycling rate of the electrode powder and the negative electrode sheet. Utility Model Content

[0005] The present application provides a separation device that can improve the separation degree of pole powder and negative electrode sheets, so as to improve the efficiency of recycling and reuse of pole sheets and negative electrode sheets, while reducing the time cost and processing cost of repairing negative electrode materials.

[0006] In order to achieve the above objectives, this application adopts the following technical solutions:

[0007] The present application provides a separation device, which is used for separation and recovery of negative electrode materials of batteries. The negative electrode materials include electrode powder and negative electrode sheets. The separation device includes:

[0008] The separation tank has a first accommodating chamber, in which a preset liquid is arranged;

[0009] The drum screen comprises a body and a blade unit, wherein the body is rotatably arranged relative to a first accommodating chamber around a first rotation axis, the liquid level of a preset liquid is located between a feed end and a discharge end of the body along a height direction of the separation tank, the body has a second accommodating chamber, the second accommodating chamber is configured to accommodate negative electrode materials, and a sieve hole communicating with the inside and outside of the body is arranged on the cavity wall of the second accommodating chamber, so that the electrode powder in the negative electrode material is separated into the first accommodating chamber through the sieve hole under the separation of the preset liquid;

[0010] The blade unit includes a double helical blade, which is connected to the cavity wall of the second accommodating cavity and spirally rises along the first rotation axis. The body rotates around the first rotation axis to drive the double helical blade to rotate and discharge the negative electrode sheet in the second accommodating cavity from the discharge end.

[0011] There is an included angle between the first rotation axis and the height direction of the separation tank.

[0012] The separation device provided by the present application puts the negative electrode material of the battery into the second containing chamber, the negative electrode material is immersed in a preset liquid, the electrode powder floats in the preset liquid under the tension of the preset liquid, the drum screen rotates around the first rotation axis, drives the preset liquid to flow, and the electrode powder is separated into the first containing chamber along with the flow of the preset liquid. At the same time, the blade unit in the drum screen rotates around the first rotation axis to discharge the negative electrode sheet in the second containing chamber from the discharge end of the drum screen. With the separation device provided by the present application, there is no need to crush and vibrate the negative electrode sheet, that is, in a complete process of separating the negative electrode material, the negative electrode sheet is intact, so that the separation degree of the electrode powder and the negative electrode sheet can be improved, so that the efficiency of recycling and reusing the electrode sheet and the negative electrode sheet can be improved, and at the same time, the time cost and processing cost of repairing the negative electrode material can be reduced.

[0013] As a possible implementation, there are multiple blade units, the multiple blade units are spaced apart along the first rotation axis, and one side edge of the blade unit away from the body forms a rotation area, and the rotation area passes through the second accommodating cavity along the first rotation axis.

[0014] As a possible implementation, the blade unit includes at least two double helical blades, and the at least two double helical blades are arranged at intervals along the helical direction of the blade unit and are arranged within a pitch of the blade unit.

[0015] As a possible embodiment, the separation device also includes a flushing mechanism, which includes a nozzle, which is arranged in the second accommodating chamber and is located above the liquid surface of the preset liquid along the height direction of the separation tank. The nozzle is configured to spray the preset liquid toward the outside of the main body along the radial direction of the main body.

[0016] As a possible implementation, the nozzle includes a first nozzle and at least two second nozzles, and the first nozzle and the discharge end are correspondingly arranged;

[0017] At least two second nozzles are spaced apart along the first rotation axis; or,

[0018] At least two second nozzles are arranged in sequence and at intervals along the spiral direction of the blade unit.

[0019] As a possible implementation, the separation device further includes a filtering assembly, and a first liquid discharge port and a second liquid discharge port are provided on the side wall of the separation tank, and the first liquid discharge port and the second liquid discharge port are arranged at intervals along the height direction of the separation tank and are arranged on different sides of the side wall of the separation tank;

[0020] The filter assembly is correspondingly arranged at least one of the first liquid discharge port and the second liquid discharge port. The filter assembly includes a filter pool and a filter screen. The filter pool is connected to at least one of the first liquid discharge port and the second liquid discharge port, and the filter screen is arranged in the filter pool.

[0021] As a possible implementation, the filter tank includes a first filter tank and a second filter tank, the first filter tank is connected to the first drainage port, and the second filter tank is connected to the second drainage port;

[0022] The filter screen, the first filter pool and the second filter pool are arranged correspondingly.

[0023] As a possible implementation, the filter assembly includes a liquid storage tank, the first filter tank and the second filter tank are both connected to the liquid storage tank, and the liquid storage tank is configured to store a preset liquid filtered by a filter screen.

[0024] As a possible implementation, the separation device further includes a water pump, which is disposed between the separation tank and the liquid storage tank, the water pump and the liquid storage tank are connected, and the water pump is configured to pump a preset liquid in the liquid storage tank into the first accommodating chamber.

[0025] As a possible implementation, the separation device further includes a feeding funnel, which is tilted relative to the body, wherein the first end of the feeding funnel is configured as a feeding port, and the second end of the feeding funnel extends into the second accommodating chamber through the feeding end. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A schematic diagram of the separation device structure provided in an embodiment of the present application;

[0028] Figure 2 A schematic diagram of the structure of a drum screen in the separation device provided in an embodiment of the present application.

[0029] Description of reference numerals:

[0030] 100-Separation equipment;

[0031] 1-separation tank; 11-first accommodating chamber; 12-first liquid discharge port; 13-second liquid discharge port;

[0032] 2-drum screen; 21-body; 22-blade unit; 23-feeding end; 24-discharging end; 25-second accommodating chamber; 26-double helical blades; 27-sieve hole;

[0033] 3-nozzle; 31-first nozzle; 32-second nozzle;

[0034] 4-filter assembly; 41-filter tank; 41a-first filter tank; 41b-second filter tank; 42-filter screen; 43-liquid storage tank;

[0035] 5- Water pump;

[0036] 6-Feeding funnel. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0038] With the continuous application of new energy batteries, more and more batteries have gradually begun to be eliminated. Researchers have also begun to study methods for recycling and reusing these eliminated batteries, especially the recycling of battery negative electrode materials.

[0039] In the prior art, the negative electrode sheet needs to be crushed and then subjected to processes such as vibration, blowing and screening to obtain electrode powder and crushed electrode sheets respectively.

[0040] However, the negative electrode material separated in the above manner may contain negative electrode sheet debris in the electrode powder, resulting in a reduced recycling rate of the electrode powder and the negative electrode sheet.

[0041] In order to overcome the defects in the prior art, the present application provides a separation device, including a separation tank and a drum screen, wherein a preset liquid is provided in the separation tank, the drum screen is inclined relative to the separation tank, and the liquid level of the preset liquid is located between the feed end and the discharge end of the drum screen in the height direction, and the negative electrode material of the battery enters the drum screen, and the pole powder in the negative electrode material of the battery diffuses under the action of the preset liquid and is separated from the sieve holes of the drum screen into the separation tank. A blade unit is provided inside the drum screen, and the drum screen rotates around the first rotation axis, so that the negative electrode sheet inside the drum screen can be discharged from the discharge end through the blade unit. In this way, the separation of the pole powder and the negative electrode sheet is achieved by washing the negative electrode material of the battery with water. Compared with the prior art, the separation purity and separation efficiency of the pole powder and the negative electrode sheet can be improved, thereby improving the recycling rate of the pole powder and the negative electrode sheet.

[0042] The content of the utility model will be described in detail below with reference to the accompanying drawings so that those skilled in the art can understand the content of the utility model more clearly and in detail.

[0043] Figure 1 This is a schematic diagram of the separation device structure provided in an embodiment of the present application. Figure 2 A schematic diagram of the structure of a drum screen in the separation device provided in an embodiment of the present application.

[0044] like Figure 1-Figure 2 As shown, this embodiment provides a separation device 100, which is used for separation and recovery of battery negative electrode materials, and the negative electrode materials include electrode powder and negative electrode sheets. The battery negative electrode material in this embodiment can be the negative electrode material of a ternary lithium battery or the negative electrode material of a lithium iron phosphate battery. The separation device 100 includes a separation tank 1 and a drum screen 2.

[0045] The separation tank 1 has a first accommodating chamber 11 , in which a preset liquid is arranged.

[0046] The drum screen 2 includes a main body 21 and a blade unit 22. The main body 21 is rotatably arranged around a first rotation axis relative to the first accommodating chamber 11. The liquid level of the preset liquid is located between the feed end 23 and the discharge end 24 of the main body 21 along the height direction of the separation tank 1. The main body 21 has a second accommodating chamber 25, and the second accommodating chamber 25 is configured to accommodate negative electrode materials. A sieve hole 27 connecting the inside and outside of the main body 21 is arranged on the cavity wall of the second accommodating chamber 25, so that the pole powder in the negative electrode material can be separated to the first accommodating chamber 11 through the sieve hole 27 under the separation of the preset liquid.

[0047] The blade unit 22 includes a double helical blade 26, which is connected to the cavity wall of the second accommodating cavity 25 and spirally ascends along the first rotation axis. The body 21 rotates around the first rotation axis to drive the double helical blade 26 to rotate and discharge the negative electrode sheet in the second accommodating cavity 25 from the discharge end 24. The first rotation axis and the height direction of the separation tank 1 form an angle.

[0048] In this embodiment, the negative electrode material of the battery is put into the second accommodating chamber 25, the negative electrode material is immersed in the preset liquid, the electrode powder floats in the preset liquid under the tension of the preset liquid, the drum screen 2 rotates around the first rotation axis, driving the preset liquid to flow, and the electrode powder will be separated into the first accommodating chamber 11 as the preset liquid flows. At the same time, the blade unit 22 in the drum screen 2 rotates around the first rotation axis to discharge the negative electrode sheet in the second accommodating chamber 25 from the discharge end 24 of the drum screen 2. Through the separation device 100 provided by this embodiment, it is no longer necessary to crush and vibrate the negative electrode sheet, that is, in a complete process of separating the negative electrode material, the negative electrode sheet is intact, so that the separation degree of the electrode powder and the negative electrode sheet can be improved, so that the efficiency of recycling and reusing the electrode sheet and the negative electrode sheet can be improved, and at the same time, the time cost and processing cost of repairing the negative electrode material can be reduced.

[0049] Exemplarily, the separation tank 1 in this embodiment can be a box-type separation tank 1 or a cabinet-type separation tank 1, and the separation tank 1 has a first accommodating chamber 11. The first accommodating chamber 11 is used to contain a preset liquid. The drum screen 2 is arranged in the first accommodating chamber 11, and the drum screen 2 rotates along the first rotation axis. The first rotation axis and the height direction of the separation tank 1 have an angle. It can be understood that the drum screen 2 is inclined relative to the cavity wall of the first accommodating chamber 11. The liquid level of the preset liquid is located between the feed end 23 and the discharge end 24 of the drum screen 2 along the height direction of the separation tank 1, that is, the drum screen 2 is partially immersed in the preset liquid along the height direction of the separation tank 1, and the negative electrode material is in the part of the drum screen 2 immersed in the preset liquid to achieve separation of the electrode powder and the negative electrode sheet.

[0050] Furthermore, the body 21 has a second accommodating chamber 25, and the two ends of the body 21 along the first rotation axis form a feed end 23 and a discharge end 24. The feed end 23 is located below the liquid level of the preset liquid in the first accommodating chamber 11, and the discharge end 24 is located above the liquid level of the preset liquid. The negative electrode material enters the second accommodating chamber 25 through the feed end 23. Since the electrode powder is insoluble in the preset liquid, the tension of the preset liquid causes the electrode powder to escape in the preset liquid, and the electrode powder is separated from the negative electrode sheet at the same time. The body 21 is provided with a sieve hole 27 connecting the inside and outside of the body 21. The electrode powder flows with the preset liquid, flows out of the sieve hole 27 and enters the first accommodating chamber 11. When the body 21 rotates around the first rotation axis, the rotation of the body 21 forms a certain centrifugal force to drive the preset liquid to flow, which can further accelerate the discharge of the electrode powder from the sieve hole 27, thereby achieving the separation of the electrode powder and the negative electrode sheet.

[0051] In order to discharge the negative electrode sheet from the second accommodating chamber 25, a blade unit 22 is provided on the inner wall of the second accommodating chamber 25 in this embodiment. The blade unit 22 includes a double helical blade 26. The double helical blade 26 rises in a spiral along the first rotation axis. It can be understood that when the body 21 rotates around the first rotation axis, the double helical blade 26 can drive the negative electrode sheet in the second accommodating chamber 25 to rise along the first rotation axis to the discharge end 24, and discharge from the discharge end 24. In the process of discharging the negative electrode sheet, collisions will occur between the negative electrode sheets and between the negative electrode sheets and the double helical blades 26, and the pole powder on the negative electrode sheet will be further detached by vibration, and flow into the first accommodating chamber 11 by the tension of the preset liquid, thereby improving the separation degree and separation efficiency of the negative electrode sheet and the pole powder.

[0052] It should be noted that the preset liquid in this embodiment is water, but it is not limited to water. A material with a large liquid tension and which will not chemically react with the pole powder can be selected.

[0053] As a possible implementation, there are multiple blade units 22, and the multiple blade units 22 are arranged at intervals along the first rotation axis, and the edge of the blade unit 22 on one side away from the body 21 forms a rotation area, and the rotation area passes through the second accommodating cavity 25 along the first rotation axis. In this way, by arranging the multiple blade units 22 at intervals, it is possible to prevent the negative electrode sheet from being stuck between adjacent blade units 22 during the discharge process, and to prevent the second accommodating cavity 25 from being blocked, which may reduce the recovery efficiency of the negative electrode sheet.

[0054] Exemplarily, each blade unit 22 in the present embodiment includes a group of double helical blades 26, and the plurality of blade units 22 are arranged in sequence along the extension direction of the first rotation axis, and the edges of adjacent double helical blades 26 can form a spiral line with gaps. And the gaps on the spiral line are distributed in sequence. When the body 21 rotates around the first rotation axis, the negative electrode sheet in the second accommodating chamber 25 will move toward the discharge end 24 along the extension direction of the first rotation axis driven by the blade unit 22. During the movement, the negative electrode sheet can smoothly move from one blade unit 22 to the next blade unit 22 through the gaps between adjacent blade units 22, and finally be discharged from the discharge end 24. It can be understood that when the negative electrode sheet is stuck in a gap at a certain position of the adjacent blade units 22, the negative electrode sheet can move to the next blade unit 22 through the gaps at other positions during the continuous rotation of the body 21 around the first rotation axis.

[0055] It can be understood that the edge of the double helical blade 26 on the side of the cavity wall facing away from the second accommodating cavity 25 forms a turning area, and the turning area passes through the second accommodating cavity 25 along the first rotation axis. During the discharge process, the negative electrode sheet will also pass through part of the turning area into the double helical blade 26 of the next blade unit 22.

[0056] Alternatively, the blade unit 22 includes at least two double helical blades 26, and the at least two double helical blades 26 are arranged at intervals along the spiral direction of the blade unit 22, and are arranged within a pitch of the blade unit 22. In this embodiment, multiple double helical blades 26 are arranged at intervals along the spiral direction, gaps are formed between the double helical blades 26, and there are at least two gaps in one spiral, so that when the body 21 rotates around the first rotation axis, a part of the gaps can hold the negative electrode sheet, and other gaps can still ensure that the negative electrode sheet passes through, so that the negative electrode sheet moves smoothly from the feed end 23 to the discharge end 24 of the body 21, thereby improving the discharge efficiency of the negative electrode sheet and improving the overall separation efficiency of the negative electrode sheet and the electrode powder.

[0057] In the specific implementation process, when the negative electrode sheet breaks through the liquid surface of the preset liquid in the second accommodating chamber 25, it is inevitable that a small amount of pole powder is on the negative electrode sheet. The main body 21 rotates around the first rotation axis, and collisions occur between the negative electrode sheets and between the negative electrode sheets and the double helical blades 26, so that a part of the pole powder can be separated under the action of vibration. In order to further improve the separation degree of the negative electrode sheet and the pole powder, the separation device 100 in this embodiment also includes a flushing mechanism, which includes a nozzle 3, which is arranged in the second accommodating chamber 25, and the nozzle 3 is located above the liquid surface of the preset liquid along the height direction of the separation tank 1, and the nozzle 3 is configured to spray the preset liquid toward the outside of the main body 21 along the radial direction of the main body 21. In this way, the nozzle 3 is arranged on the discharge path of the negative electrode sheet, and after the negative electrode sheet breaks through the liquid surface, the negative electrode sheet is flushed, and the negative electrode sheet and the pole powder are further separated to improve the separation degree and separation efficiency of the negative electrode sheet and the pole powder.

[0058] Exemplarily, the nozzle 3 includes a first nozzle 31, and the first nozzle 31 is arranged corresponding to the discharge end 24. The first nozzle 31 is arranged in the second accommodating chamber 25, and the first nozzle 31 is arranged on one side of the discharge end 24. In this way, when the negative electrode sheet moves to the discharge end 24, the first nozzle 31 is used to flush the negative electrode sheet there, so as to flush away a small amount of electrode powder brought out by the negative electrode sheet, and the separation degree of the negative electrode sheet when discharged from the second accommodating chamber 25 is higher.

[0059] Furthermore, the nozzle 3 further includes at least two second nozzles 32 , and the at least two second nozzles 32 are arranged at intervals along the first rotation axis; or, the at least two second nozzles 32 are arranged at intervals in sequence along the spiral direction of the blade unit 22 .

[0060] On the basis of the above-mentioned embodiment, the two second nozzles 32 in this embodiment are arranged in the second accommodating chamber 25, and the two second nozzles 32 are arranged above the liquid level of the preset liquid in the height direction. Among them, the two second nozzles 32 are arranged at intervals along the extension direction of the first rotation axis. In this way, after the negative electrode sheet breaks through the liquid level of the preset liquid in the second accommodating chamber 25, the second nozzle 32 will flush the negative electrode sheet in the accommodating chamber, further separating the negative electrode sheet from the entrained pole powder. It can be understood that when the body 21 rotates around the first rotation axis and moves the negative electrode sheet to the discharge end 24, the first nozzle 31 will still flush the negative electrode sheet, once again promoting the separation of pole powder and negative electrode sheet. In this embodiment, on the movement path of the negative electrode sheet, the pole powder and the negative electrode sheet are separated three times, thereby improving the separation degree and separation efficiency of the pole powder and the negative electrode sheet, and then improving the cost and efficiency of recycling and reusing the pole powder and the negative electrode sheet.

[0061] Of course, the two second nozzles 32 can also be arranged in sequence along the spiral direction of the blade unit 22. It can be understood that the two second nozzles 32 are staggered on the cross section of the main body 21, and the flushing angles of the two second nozzles 32 are changed relative to the above-mentioned embodiment. And the flushing angle range of the two second nozzles 32 in this embodiment is larger, and the negative electrode sheet can be flushed at multiple angles, reducing the flushing dead angle, so as to improve the separation degree between the electrode powder and the negative electrode sheet. It should be noted that the number of second nozzles 32 in this embodiment is not limited to two, and the number of second nozzles 32 can be selected according to the structure of the main body 21 and actual needs.

[0062] In this embodiment, the separation device 100 further includes a driving assembly (not shown in the figure), the driving assembly includes a motor and a transmission gear set, the transmission gear set includes a first gear and a second gear, the second gear is arranged on one side of the discharge end 24, and the second gear is sleeved on the outer side of the body 21; the gear surface of the first gear and the gear surface of the second gear are meshed, and the motor is configured to drive the first gear to rotate around the second rotation axis to drive the body 21 to rotate around the first rotation axis, and the second rotation axis is parallel to the first rotation axis. In this way, the rotation of the body 21 around the first rotation axis is realized by the arrangement of the motor and the transmission gear set.

[0063] Exemplarily, the second gear can be arranged on one side of the discharge end 24 of the body 21, the second gear sleeve is arranged outside the discharge end 24 of the body 21, the first gear and the second gear are meshed through the gear surface, the output shaft of the motor can be connected to the first gear through the hole shaft matching key, the output shaft of the motor outputs circular motion, and drives the body 21 to rotate around the first rotation axis through the transmission of the transmission gear set. The second rotation axis in this embodiment is the axis of the output shaft of the motor.

[0064] Of course, the drive assembly in this embodiment may also include a reducer (not shown in the figure), the output shaft of the motor is connected to the input end of the reducer, and the output end of the reducer is connected to the first gear, so that the first gear can still rotate around the second rotation axis, and drive the body 21 to rotate around the first rotation axis, and at the same time, the negative electrode sheet is discharged from the second accommodating chamber 25. The reducer in this embodiment can effectively reduce the moment of inertia and control the start and stop and speed change in time. Increasing the torque is equivalent to increasing the input power, which can reduce the power required by the motor.

[0065] As a possible implementation, the body 21 has a gear surface (not shown in the figure), the gear surface extends along the circumference of the body 21, and the gear surface is meshed with the gear surface of the first gear or the second gear.

[0066] Exemplarily, the circumferential outer wall of the discharge end 24 of the main body 21 is provided with a gear surface, and the gear surface on the main body 21 can directly mesh with the gear surface of the first gear. In this way, the first gear rotates around the second rotation axis driven by the output shaft of the motor, and the first gear can drive the main body 21 to rotate around the first rotation axis. Of course, the gear surface on the main body 21 can also mesh with the gear surface of the second gear for transmission. At this time, the motion transmission route is: the output shaft of the motor-the first gear-the second gear-the main body 21. On the one hand, such a transmission method ensures that the main body 21 rotates around the first rotation axis. Moreover, through the setting of the second gear, the rotation speed of the drive assembly is reduced, so that the movement of the pole piece from the feed end 23 and the discharge end 24 of the main body 21 is smoother. Specifically, the speed change of the drive assembly can be adjusted by selecting the number of teeth of the first gear and the second gear.

[0067] Of course, there is another implementation method, in which the gear surface on the main body 21 can mesh with the first gear and the second gear at the same time to form a planetary gear transmission mode, further ensuring the smoothness and stability of the motion transmission.

[0068] In this embodiment, the separation device 100 further includes a filter assembly 4. The side wall of the separation tank 1 is provided with a first drain port 12 and a second drain port 13. The first drain port 12 and the second drain port 13 are arranged at intervals along the height direction of the separation tank 1 and are arranged on different sides of the side wall of the separation tank 1. The filter assembly 4 is correspondingly arranged at least one of the first drain port 12 and the second drain port 13. The filter assembly 4 includes a filter tank 41 and a filter screen 42. The filter tank 41 is connected to at least one of the first drain port 12 and the second drain port 13. The filter screen 42 is arranged in the filter tank 41. In this way, the preset liquid discharged from the first accommodating chamber 11 is filtered by the filter assembly 4, and the preset liquid and the pole powder are separated, so as to prepare the pole powder for use in the subsequent recovery process.

[0069] Exemplarily, the separation tank 1 has a first liquid discharge port 12, and the first liquid discharge port 12 is arranged on one side of the separation tank 1 near the top along the height direction of the separation tank 1. A certain amount of preset liquid is already stored in the first accommodating chamber 11 before starting work. After the negative electrode material enters the second accommodating chamber 25, the liquid level of the preset liquid will rise to a certain extent. At the same time, in the process of discharging the negative electrode sheet along the first rotation axis, the flushing mechanism flushes the negative electrode sheet, and this part of the preset liquid will also flow into the first accommodating chamber 11. The liquid level of the preset liquid in the first accommodating chamber 11 continues to rise and is discharged from the first liquid discharge port 12. It can be understood that the first liquid discharge port 12 discharges a mixture of the preset liquid and the electrode powder, and the mixture needs to be separated by the filter component 4 to obtain a highly separated electrode powder.

[0070] The filter assembly 4 in this embodiment includes a filter pool 41 and a filter screen 42. The filter screen 42 is arranged in the filter pool 41. The filter pool 41 and the first liquid discharge port 12 are arranged correspondingly, and the first liquid discharge port 12 and the filter pool 41 are connected. The mixture discharged from the first liquid discharge port 12 is filtered by the filter screen 42 in the filter pool 41, and the powder is left on the filter screen 42. The preset liquid is stored in the filter pool 41 through the filter screen 42. The staff can collect the powder on the filter screen 42 for subsequent use.

[0071] When the negative electrode material is recovered or the separation tank 1 and the drum screen 2 are to be cleaned, it is necessary to drain all the preset liquid in the first accommodating chamber 11. In this way, a second drain port 13 can be set on the bottom side of the separation tank 1, and the second drain port 13 on the bottom side of the separation tank 1 is opened, and the preset liquid in the first accommodating chamber 11 is discharged from the second drain port 13. It can be understood that what is left in the first accommodating chamber 11 is essentially a mixture of the preset liquid and the pole powder. Therefore, it is necessary to filter the mixture discharged from the second drain port 13 to separate the preset liquid and the pole powder in the mixture. The filter assembly 4 and the second drain port 13 are correspondingly arranged, wherein the working principle and function of the filter tank 41 and the filter screen 42 of this part are the same as those of the aforementioned embodiment, and this part will not be repeated.

[0072] Specifically, the filter pool 41 includes a first filter pool 41a and a second filter pool 41b. The first filter pool 41a is connected to the first drainage port 12, and the second filter pool 41b is connected to the second drainage port 13. The filter screen 42 is correspondingly arranged to the first filter pool 41a and the second filter pool 41b.

[0073] Further, the filter assembly 4 includes a liquid storage tank 43, the first filter tank 41a and the second filter tank 41b are both connected to the liquid storage tank 43, and the liquid storage tank 43 is configured to store the preset liquid filtered by the filter screen 42. In this way, the liquid storage tank 43 collects the filtered preset liquid, which can relieve the liquid storage pressure of the first filter tank 41a and the second filter tank 41b.

[0074] It can be understood that during the operation of the separation device 100, the liquid level in the first accommodating chamber 11 rises to the first liquid discharge port 12, and the mixture of the preset liquid and the pole powder overflows to the first filter tank 41a through the first liquid discharge port 12. The liquid storage space of the first filter tank 41a is limited, so the preset liquid separated by the filter screen 42 of the first filter tank 41a can be introduced into the liquid storage tank 43 for storage, which can relieve the liquid storage pressure of the first filter tank 41a. In this way, the first filter tank 41a only needs to bear the role of filtering. For the overall structure of the separation device 100, the structure of the first filter tank 41a can be relatively smaller on the basis of meeting the filtering requirements, which can not only reduce the space occupation of the separation device 100, but also save the production cost of the separation device 100, and has good economic benefits.

[0075] Similarly, for the second filter tank 41b, the connection and function between the liquid storage tank 43 and the second filter tank 41b are the same as the connection and function between the liquid storage tank 43 and the first filter tank 41a, and will not be repeated in this section.

[0076] On the basis of the above-mentioned embodiment, the separation device 100 further includes a water pump 5, which is disposed between the separation tank 1 and the liquid storage tank 43, the water pump 5 and the liquid storage tank 43 are in communication, and the water pump 5 is configured to pump the preset liquid in the liquid storage tank 43 into the first accommodation chamber 11. In this way, the setting of the water pump 5 enables the flow of the preset liquid to form a cycle, and at the same time, the preset liquid pumped into the first accommodation chamber 11 by the water pump 5 forms a liquid flow, and the liquid flow has liquid power, and the liquid power drives the preset liquid in the first accommodation chamber 11 and the second accommodation chamber 25 to flow, so as to quickly separate the pole powder in the drum screen 2 from the sieve hole 27 to the first accommodation chamber 11, thereby improving the separation efficiency of the negative electrode material.

[0077] The separation device 100 provided in this embodiment further includes a feeding funnel 6 , which is tilted relative to the body 21 , and a first end of the feeding funnel 6 is configured as a feeding port, and a second end of the feeding funnel 6 extends into the second accommodating chamber 25 through a feeding end 23 .

[0078] The feeding funnel 6 is connected to the second accommodating chamber 25, and the feeding funnel 6 is inclined relative to the main body 21 so that the negative electrode material can smoothly enter the second accommodating chamber 25. The second end of the feeding funnel 6 extends into the second accommodating chamber 25 through the feeding end 23, which can ensure that the negative electrode sheet in the negative electrode material enters the double helical blades 26 of the blade unit 22, and moves from the feeding end 23 of the main body 21 to the discharging end 24 under the action of the double helical blades 26, and is finally discharged from the discharging end 24.

[0079] The separation device provided in this embodiment is applied to the separation and recovery of negative electrode materials of batteries, and the negative electrode materials include electrode powder and negative electrode sheets. The separation device includes a separation tank and a drum screen. Among them, the separation tank has a first accommodating chamber, and a preset liquid is arranged in the first accommodating chamber. The drum screen includes a body and a blade unit, the body is arranged to rotate around a first rotation axis relative to the first accommodating chamber, and the liquid level of the preset liquid is located between the feed end and the discharge end of the body along the height direction of the separation tank. The body has a second accommodating chamber, and the second accommodating chamber is configured to accommodate negative electrode materials. The cavity wall of the second accommodating chamber is provided with a sieve hole 27 connecting the inside and outside of the body, so that the electrode powder in the negative electrode material is separated to the first accommodating chamber through the sieve hole under the separation of the preset liquid. The blade unit includes a double helical blade, the double helical blade is connected to the cavity wall of the second accommodating chamber, and spirally rises along the first rotation axis. The body rotates around the first rotation axis to drive the double helical blade to rotate and discharge the negative electrode sheet in the second accommodating chamber from the discharge end. Among them, the first rotation axis and the height direction of the separation tank have an angle. Through such a structural setting, the separation degree and separation efficiency of the electrode powder and the negative electrode sheet are improved, and the efficiency of recycling and reuse of the electrode powder and the negative electrode sheet is also improved.

[0080] It should be noted that the phrases "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include certain features, structures or characteristics, but not every embodiment may include the certain features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing certain features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments, whether explicitly or not explicitly described.

[0081] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0082] It should be easily understood that “on,” “above,” and “over” in this application should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above something” or “over,” but also may include the meaning of “above something” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0083] In addition, spatially relative terms, such as "below," "below," "below," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90° or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A separation device, used for separation and recovery of negative electrode materials of batteries, the negative electrode materials include electrode powder and negative electrode sheets, characterized in that: The separation device comprises: The separation tank has a first accommodating chamber, wherein a preset liquid is arranged in the first accommodating chamber; A drum screen, comprising a body and a blade unit, wherein the body is rotatably arranged relative to the first accommodating chamber around a first rotation axis, the liquid level of the preset liquid is located between the feed end and the discharge end of the body along the height direction of the separation tank, the body has a second accommodating chamber, the second accommodating chamber is configured to accommodate the negative electrode material, and a sieve hole communicating with the inside and outside of the body is arranged on the cavity wall of the second accommodating chamber, so that the electrode powder in the negative electrode material is separated by the preset liquid through the sieve hole to the first accommodating chamber; The blade unit includes a double helical blade, the double helical blade is connected to the cavity wall of the second accommodating cavity and spirally rises along the first rotation axis, and the body rotates around the first rotation axis to drive the double helical blade to rotate and discharge the negative electrode sheet in the second accommodating cavity from the discharge end; Wherein, the first rotation axis and the height direction of the separation tank have an included angle.

2. The separation device according to claim 1, characterized in that There are a plurality of blade units, which are spaced apart along the first rotation axis, and a side edge of the blade unit away from the body forms a rotation area, and the rotation area passes through the second accommodating cavity along the first rotation axis.

3. The separation device according to claim 1, characterized in that The blade unit comprises at least two double helical blades, and the at least two double helical blades are arranged at intervals along the helical direction of the blade unit and are arranged within a pitch of the blade unit.

4. The separation device according to any one of claims 1 to 3, characterized in that: It also includes a flushing mechanism, which includes a nozzle, which is arranged in the second accommodating chamber, and the nozzle is located above the liquid surface of the preset liquid along the height direction of the separation tank, and the nozzle is configured to spray the preset liquid toward the outside of the main body along the radial direction of the main body.

5. The separation device according to claim 4, characterized in that The nozzle comprises a first nozzle and at least two second nozzles, and the first nozzle and the discharge end are arranged correspondingly; At least two of the second nozzles are spaced apart along the first rotation axis; or, At least two of the second nozzles are sequentially arranged at intervals along the spiral direction of the blade unit.

6. The separation device according to any one of claims 1 to 3, characterized in that: It also includes a filter assembly, wherein the side wall of the separation tank is provided with a first drain port and a second drain port, the first drain port and the second drain port are arranged at intervals along the height direction of the separation tank, and are arranged on different sides of the side wall of the separation tank; The filter component is correspondingly arranged at at least one of the first drain port and the second drain port, and the filter component includes a filter pool and a filter screen. The filter pool is connected to at least one of the first drain port and the second drain port, and the filter screen is arranged in the filter pool.

7. The separation device according to claim 6, characterized in that The filter tank comprises a first filter tank and a second filter tank, the first filter tank is connected to the first drainage port, and the second filter tank is connected to the second drainage port; The filter screen is arranged correspondingly to the first filter pool and the second filter pool.

8. The separation device according to claim 7, characterized in that The filter assembly includes a liquid storage tank, the first filter tank and the second filter tank are both connected to the liquid storage tank, and the liquid storage tank is configured to store the preset liquid filtered by the filter screen.

9. The separation device according to claim 8, characterized in that It also includes a water pump, which is arranged between the separation tank and the liquid storage tank, the water pump is connected to the liquid storage tank, and the water pump is configured to pump the preset liquid in the liquid storage tank into the first accommodating chamber.

10. The separation device according to any one of claims 1 to 3, characterized in that: It also includes a feeding funnel, which is tilted relative to the main body, the first end of the feeding funnel is configured as a feeding port, and the second end of the feeding funnel extends into the second accommodating cavity through the feeding end.

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