Device for high-voltage pulse separation of battery electrodes and method for recycling battery electrodes.

Abstract

The application relates to a device for separating battery pole pieces by high-voltage pulses and a battery pole piece recycling method. The device comprises a water tank (4), a pulse discharge assembly (3), a guide assembly (1) and a driving assembly (2). The pulse discharge assembly (3) is located above the water tank (4). The pulse discharge assembly (3) comprises a power supply and two interval arranged chuck heads (32), the chuck heads (32) are electrically connected with the power supply, and the chuck heads are arranged to clamp the battery pole pieces (6). The guide assembly (1) is arranged to drive the pulse discharge assembly (3) to perform lifting movement, and enables the battery pole pieces (6) to be selectively immersed in water. The driving assembly (2) is arranged to drive the pulse discharge assembly (3) to move along the length direction of the water tank (4).

Description

Technical Field

[0001] This application relates to the field of battery recycling technology, for example to a device for separating battery electrodes by a high-voltage pulse and a method for recycling battery electrodes. Background Technology

[0002] Lithium-ion batteries are widely used in power vehicles, communication, and energy storage, and are currently experiencing rapid development. The main components of a lithium-ion battery are the positive and negative electrodes. The positive electrode includes a positive current collector and active material coated on the current collector. This active material contains rare elements such as lithium, cobalt, and nickel. To conserve mineral resources, retired lithium-ion batteries are typically recycled, especially the rare elements in the active material. One recycling method involves connecting a pulse discharge device to the positive electrode. Pulse discharge is applied to the positive electrode to detach the active material from the current collector. The pulse discharge device includes a water tank and positive and negative electrodes installed within the tank. The positive and negative electrodes are clamped to both ends of the positive electrode to establish a conductive circuit. The water tank contains water, suspending the active material detached from the positive electrode for collection.

[0003] The related technology has the following shortcomings: The active material is made from powdered raw materials bonded together. After pulse discharge, the binder vaporizes upon heating, causing the active material to detach and suspend in the water. As the concentration of the active material in the water near the positive and negative electrodes increases, the active material easily adheres to the positive electrode current collector and cannot be detached. Furthermore, during the recycling process, the positive electrode sheets need to be individually placed in water and installed on the positive and negative electrodes, which is cumbersome and results in low overall processing efficiency. Summary of the Invention

[0004] This application proposes a device for separating battery electrodes using a high-voltage pulse, which enables the active material to be smoothly detached from the battery electrodes, resulting in high efficiency in the separation and processing of the active material.

[0005] This application also proposes a method for recycling battery electrodes, which allows active materials to be easily detached from the battery electrodes and achieves high efficiency in the separation and processing of active materials.

[0006] The following technical solution is adopted in this application:

[0007] This application provides a device for separating battery electrodes using a high-voltage pulse, comprising:

[0008] A water tank, the contents of which contain water;

[0009] A pulse discharge assembly is located above the water tank, the pulse discharge assembly comprises a power supply and two spaced apart clamps, the clamps are electrically connected with the power supply, the clamps are arranged to clamp the battery pole piece, and the power supply can pulse discharge the battery pole piece through the clamps;

[0010] A guide assembly is connected with the pulse discharge assembly, the guide assembly is arranged to drive the pulse discharge assembly to move up and down and enable the battery pole piece to be selectively immersed in water;

[0011] A drive assembly is connected with the guide assembly, the drive assembly is arranged to drive the pulse discharge assembly to move along the extension direction of the water tank.

[0012] Optionally, the water tank is in the shape of a circular ring.

[0013] Optionally, the guide assembly comprises a housing and a first connecting rod, the pulse discharge assembly is mounted on the first connecting rod, the drive assembly comprises a motor and a second connecting rod, the motor is mounted on the housing, the motor is in transmission connection with the second connecting rod, the motor is arranged to drive the second connecting rod to rotate along the circumferential direction of the housing, the first connecting rod is inserted into the second connecting rod, the first connecting rod can move along the vertical direction relative to the second connecting rod, and the housing is provided with a guide groove, the first connecting rod is in sliding connection or rolling connection with the guide groove.

[0014] Optionally, the first connecting rod comprises a rod body, a connecting piece and a guide wheel, one end of the connecting piece is connected with the rod body, the guide wheel is rotatably arranged at the end of the connecting piece away from the rod body, the guide wheel is inserted into the guide groove and is in rolling connection with the groove wall of the guide groove.

[0015] Optionally, along the length direction of the guide groove, the guide groove comprises a first horizontal section, an ascending section, a second horizontal section and a descending section connected in sequence, the distance between the first horizontal section and the water tank is smaller than the distance between the second horizontal section and the water tank, in the case that the first connecting rod moves along the first horizontal section, the battery pole piece is immersed in water, and in the case that the first connecting rod moves along the second horizontal section, the battery pole piece is above the water surface.

[0016] Optionally, the first horizontal section is provided with a first sensor, and the first sensor is electrically connected with the power supply.

[0017] Optionally, the pulse discharge assembly is multiple, the multiple pulse discharge assemblies are distributed along the extension direction of the water tank, each of the pulse discharge assemblies is provided with a first connecting rod, and all the first connecting rods are connected with the driving assembly, so that the driving assembly can drive all the pulse discharge assemblies to move.

[0018] Optionally, the device further comprises a material jig, the material jig comprises multiple material grooves arranged along a first direction, the first direction is perpendicular to the extension direction of the water tank, and the battery pole piece is placed in the material groove, and the clamp head clamps the battery pole piece from the material jig.

[0019] The application also provides a battery pole piece recycling method applied to the device for separating battery pole pieces by high-voltage pulse, the device has a feeding position, a separating position and a discharging position distributed along the extension direction of the water tank in sequence, and the method comprises the following steps.

[0020] Step S1, the pulse discharge assembly clamps the battery pole piece from the feeding position;

[0021] Step S2, the driving assembly drives the pulse discharge assembly to move along the extension direction of the water tank, and the guide assembly drives the pulse discharge assembly to descend, the pulse discharge assembly moves from the feeding position to the separating position, and the battery pole piece is immersed in water;

[0022] In the case that the pulse discharge assembly is located at the separating position, the pulse discharge assembly discharges the battery pole piece by pulse, so that the active material on the battery pole piece is separated;

[0023] Step S3, the driving assembly drives the pulse discharge assembly to move along the extension direction of the water tank, and the guide assembly drives the pulse discharge assembly to ascend, the pulse discharge assembly moves from the separating position to the discharging position, and the battery pole piece is separated from water;

[0024] In the case that the pulse discharge assembly is located at the discharging position, the clamp head releases the battery pole piece.

[0025] Optionally, in the case that the pulse discharge assembly is located at the feeding position and the separating position, the residence time T. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a schematic view of the device for separating battery pole pieces by high-voltage pulse in the embodiment of the application.

[0027] Figure 2 It is a schematic view of the first angle of the pulse discharge assembly in the embodiment of the application.

[0028] Figure 3This is a schematic diagram of the pulse discharge component from a second angle according to an embodiment of this application.

[0029] Figure 4 This is a schematic diagram showing the unfolded centerline of the guide groove in an embodiment of this application.

[0030] Figure 5 This is a schematic diagram of a material fixture according to an embodiment of this application.

[0031] Figure 6 This is a top view of a high-voltage pulse separation device for battery electrodes according to an embodiment of this application.

[0032] In the picture:

[0033] 1. Guide assembly; 11. First connecting rod; 111. Connector; 112. Guide wheel; 12. Housing; 13. Guide groove; 131. First horizontal section; 132. Rising section; 133. Second horizontal section; 134. Falling section; 2. Drive assembly; 21. Motor; 22. Second connecting rod; 3. Pulse discharge assembly; 31. Base; 32. Clamp; 4. Water tank; 41. Partition plate; 5. Material fixture; 51. Material tank; 6. Battery electrode. Detailed Implementation

[0034] The technical solution of this application will be explained below with reference to the accompanying drawings and specific embodiments.

[0035] like Figures 1 to 3 As shown, this application provides a high-voltage pulse separation device for battery electrodes, configured to recycle the active material of battery electrodes 6. The main components within a lithium battery are the positive electrode and the negative electrode, collectively referred to as battery electrodes 6. In this embodiment, the object of recycling is the positive electrode. The positive electrode includes a positive current collector, active material, and a binder. The positive current collector is made of aluminum foil, and the active material is attached to the surface of the positive current collector by the binder. During recycling, a high-current pulse flows through the positive electrode, causing the binder to melt at high temperature, thereby separating the active material from the positive current collector, achieving the separate recycling of the active material and the positive current collector. For ease of description, both the positive current collector with and without active material are referred to as battery electrodes 6.

[0036] The high-voltage pulse separation device for battery electrodes includes a guide assembly 1, a drive assembly 2, a pulse discharge assembly 3, and a water tank 4. Both the guide assembly 1 and the drive assembly 2 drive the movement of the pulse discharge assembly 3. The pulse discharge assembly 3 is configured to clamp the battery electrode 6 and perform pulse discharge on it, thereby detaching the active material from the positive electrode current collector. The water tank 4 is configured to collect the active material.

[0037] The water tank 4 is circular, and water is contained in the water tank 4. The extension direction of the water tank 4 is the circumferential direction of the water tank 4. During the recovery treatment, the battery pole piece 6 is immersed in the water and subjected to pulse discharge, and the separated active material is suspended in the water. When the content of the active material in the water reaches a set content, the water can be subjected to filtration treatment to obtain the active material.

[0038] The guide assembly 1 comprises a first connecting rod 11 and a housing 12. The housing 12 is in a cylindrical structure, and a guide groove 13 is arranged on the side wall of the housing 12. The guide groove 13 is a closed annular structure. The first connecting rod 11 comprises a rod body, a connecting piece 111 and a guide wheel 112. The connecting piece 111 is arranged to mount the guide wheel 112. One end of the connecting piece 111 is connected and fixed with the rod body, and the guide wheel 112 is rotationally arranged at the end of the connecting piece 111 away from the rod body. The guide wheel 112 is inserted into the guide groove 13, and the guide wheel 112 is in rolling connection with the groove wall of the guide groove 13, so that the first connecting rod 11 can move along the extension direction of the guide groove 13. Under the guidance of the guide groove 13, the movement path of the first connecting rod 11 matches the extension direction of the guide groove 13. Of course, in other embodiments, the first connecting rod 11 can also be in sliding connection with the guide groove 13, that is, a sliding block is arranged on the first connecting rod 11, and the sliding block is inserted into the guide groove 13 and in sliding connection with the groove wall of the guide groove 13.

[0039] The drive assembly 2 comprises a motor 21 and a second connecting rod 22. The motor 21 is mounted on the housing 12, and the motor 21 is coaxial with the housing 12. The output end of the motor 21 is in transmission connection with the second connecting rod 22. The motor 21 and the second connecting rod 22 can be connected through a gear transmission mechanism, a chain transmission mechanism or a belt transmission mechanism, so that the motor 21 can drive the second connecting rod 22 to rotate along the circumferential direction of the housing 12. The second connecting rod 22 is in an "L" shape, and comprises an integrally formed horizontal section and a vertical section. The horizontal section of the second connecting rod 22 extends in the horizontal direction, and the horizontal section of the second connecting rod 22 is connected with the motor 21. The vertical section of the second connecting rod 22 extends in the vertical direction, and the vertical section of the second connecting rod 22 is connected with the first connecting rod 11. An installation hole is arranged on the first connecting rod 11, and the installation hole is coaxial with the first connecting rod 11. The second connecting rod 22 is inserted into the installation hole, that is, the first connecting rod 11 and the second connecting rod 22 are inserted and connected. The first connecting rod 11 can move in the vertical direction relative to the second connecting rod 22. The first connecting rod 11 and the second connecting rod 22 can move in the vertical direction. When the drive assembly 2 drives the first connecting rod 11 to rotate along the circumferential direction of the housing 12, the first connecting rod 11 is also driven by the driving force from the guide wheel 112. The first connecting rod 11 rotates along the circumferential direction of the housing 12, and at the same time, the first connecting rod 11 moves up and down in the vertical direction under the driving of the guide wheel 112.

[0040] The shell 12 is located above the water tank 4, and the pulse discharge assembly 3 is installed at the bottom of the first connecting rod 11. The pulse discharge assembly 3 is also located above the water tank 4. The pulse discharge assembly 3 moves synchronously with the first connecting rod 11, that is, the movement path of the pulse discharge assembly 3 matches the extension direction of the guide groove 13. The guide groove 13 and the guide assembly 1 form a groove cam mechanism. In actual application, the shape of the guide groove 13 can be designed according to the actual required movement path of the pulse discharge assembly 3, and the groove cam mechanism has the characteristics of simple structure and flexible application. In the embodiment, the guide assembly 1 is arranged to drive the pulse discharge assembly 3 to move up and down, and the drive assembly 2 is arranged to drive the pulse discharge assembly 3 to move along the circumferential direction of the shell 12. Under the driving action of the guide assembly 1 and the drive assembly 2, the pulse discharge assembly 3 synchronously moves up and down and rotates, so that the pulse discharge assembly 3 can move along the extension direction of the guide groove 13. During the movement of the pulse discharge assembly 3, the pulse discharge assembly 3 is always located above the water tank 4. In the case that the battery pole piece 6 moves to above the water surface after being separated and treated in water, the water adhered to the battery pole piece 6 can still drip into the water tank 4. Since the water tank 4 is in the shape of a circular ring, the circumferential direction of the water tank 4 is the extension direction of the water tank 4.

[0041] The pulse discharge assembly 3 includes a base 31, a power supply and two clamps 32. The base 31 is installed at the bottom of the first connecting rod 11, and the two clamps 32 are arranged on the base 31 in a spaced manner. The clamp 32 is arranged to clamp the battery pole piece 6, and the clamp 32 includes two openable and closable electrode plates made of copper plates with good electrical conductivity and heat resistance. The two clamps 32 are connected with the power supply through high-voltage cables, and the two clamps 32 are positive clamps and negative clamps respectively. In the case that the two clamps 32 clamp the battery pole piece 6, a current loop is formed among the power supply, the clamp 32 and the battery pole piece 6. The power supply is a pulse power supply formed by a capacitor bank circuit. In operation, the battery pole piece 6 is discharged by using the energy stored in the capacitor. The voltage of the power supply can be selected in the range of 20KV-30KV. Under the action of the pulse current, the battery pole piece 6 is heated, and the binder is decomposed by heat, so that the active material is separated from the positive current collector. In actual application, the voltage value of the power supply can be reasonably selected according to the heat resistance of the battery pole piece 6, so as to ensure that the active material is separated, and at the same time, the temperature of the positive current collector is prevented from being too high to be melted.

[0042] Referring to Figure 1 and Figure 4As shown, the middle line of the guide groove 13 is in a curved shape after being developed. The extension direction (length direction) of the middle line of the guide groove 13 corresponds to the movement path of the pulse discharge assembly 3. Along the length direction of the guide groove 13, the guide groove 13 includes a first horizontal section 131, an ascending section 132, a second horizontal section 133 and a descending section 134 connected in sequence. The first horizontal section 131 and the second horizontal section 133 both extend in the horizontal direction. In the case that the guide wheel 112 moves in the first horizontal section 131 or the second horizontal section 133, the relative height between the pulse discharge assembly 3 and the water tank 4 is constant, i.e. the pulse discharge assembly 3 is in a horizontal movement state. The distance between the first horizontal section 131 and the water tank 4 is smaller than the distance between the second horizontal section 133 and the water tank 4, i.e. the second horizontal section 133 is higher than the first horizontal section 131. The ascending section 132 and the descending section 134 are in a curved structure, and both serve as a transition between the first horizontal section 131 and the second horizontal section 133. In the case that the guide wheel 112 moves in the ascending section 132, the pulse discharge assembly 3 is in an ascending movement state. In the case that the guide wheel 112 moves in the descending section 134, the pulse discharge assembly 3 is in a descending movement state. In the ascending and descending movement of the pulse discharge assembly 3, the battery tab 6 can be selectively immersed in water. In the case that the battery tab 6 is immersed in water, the battery tab 6 is subjected to pulse discharge to separate and recover the active material. In the case that the battery tab 6 is above the water surface, the treated positive tab can be drained, recovered, replaced and clamped, etc.

[0043] In the case that the first connecting rod 11 moves along the first horizontal section 131, the battery tab 6 is immersed in water. In this process, the power is discharged, and the active material is separated from the battery tab 6 and suspended in water. In the case that the first connecting rod 11 moves along the second horizontal section 133, the battery tab 6 is above the water surface, so as to recover the treated positive current collector and replace the new battery tab 6 on the pulse discharge assembly 3. By arranging the first horizontal section 131, the immersion depth of the battery tab 6 in water can be controlled. When the battery tab 6 reaches the set depth in water, the horizontal movement of the battery tab 6 can be used to maintain the set depth, avoiding the continuous descent of the battery tab 6. In actual application, the battery tab 6 is separated and treated in the upper region of water. The suspended active material gradually deposits in the lower region of water. Since the battery tab 6 moves in the upper region of water, the active material in the lower region of water can be avoided from being stirred, thereby reducing the concentration of the active material in the upper region of water and prolonging the replacement cycle of water in the water tank 4.

[0044] The guide assembly 1 drives the pulse discharge assembly 3 to move up and down, and the drive assembly 2 drives the pulse discharge assembly 3 to move along the extension direction of the water tank 4. In the case of separating the active material of the battery tab 6, the battery tab 6 is in a moving state in the water, and under the disturbance of the water, the active material can be promoted to fall off from the battery tab 6 to the water. At the same time, in the process of moving the battery tab 6 along the extension direction of the water tank 4, the battery tab 6 is alternately located below and above the water surface, so as to pulse discharge and replace the clamping of the battery tab 6. The structure is beneficial to improve the continuity of the separation process of the battery tab 6, and further improve the production efficiency.

[0045] Optionally, the pulse discharge assembly 3 is multiple, and the multiple pulse discharge assemblies 3 are distributed at intervals along the extension direction of the water tank 4. Each pulse discharge assembly 3 is provided with a first connecting rod 11, so that each pulse discharge assembly 3 is connected with the guide groove 13 through the first connecting rod 11. All the first connecting rods 11 are connected with the second drive member 2. The second drive member 2 includes a motor and multiple second connecting rods 22 connected with the motor. The multiple second connecting rods 22 are provided one by one with the multiple first connecting rods 11. The structure makes the drive assembly 2 drive all the pulse discharge assemblies 3 to move. The multiple pulse discharge assemblies 3 can make the connection between the pulse discharge, the positive current collector recovery, and the replacement clamping of the battery tab 6 in the production process more compact, and improve the production efficiency. In an optional embodiment, the pulse discharge assembly 3 is two, and the two pulse discharge assemblies 3 are oppositely arranged on the housing 12. In the case of one of the pulse discharge assemblies 3 descending into the water to pulse discharge the battery tab 6, the other pulse discharge assembly 3 rises above the water surface and performs the replacement clamping operation of the battery tab 6.

[0046] Optionally, the pulse discharge assembly 3 further includes a first sensor electrically connected with the power supply. The power supply is provided with a control circuit board, and the first sensor is connected to the control circuit board. The first sensor is arranged to detect the position of the pulse discharge assembly 3, and when the pulse discharge assembly 3 moves to a set position, the first sensor sends a signal to the control circuit board to start the power discharge. The first sensor is installed on the first horizontal section 131 of the guide groove 13. In the case of the guide assembly 1 moving on the first horizontal section 131, the battery tab 6 is immersed in the water. The first sensor detects the position of the pulse discharge assembly 3 and sends a signal. The first sensor can be a touch switch, an infrared sensor, a laser sensor, etc.

[0047] Similarly, a second sensor can also be arranged on the second horizontal section 133 of the guide groove 13, and the second sensor is electrically connected with the chuck 32. The second sensor is used to detect the position of the pulse discharge assembly 3 to control the opening and closing of the chuck 32. The second sensor can be a touch switch, an infrared sensor, a laser sensor, etc.

[0048] Optionally, referring to Figure 5 and Figure 6 As shown, the device for separating the battery pole piece by high-voltage pulse further comprises a material fixture 5. The material fixture 5 is arranged to store the battery pole piece 6. The material fixture 5 is arranged in the corresponding area of the second horizontal section 133 of the guide groove 13. When the pulse discharge assembly 3 moves to the area, the clamp head 32 clamps the battery pole piece 6 from the material fixture 5. The material fixture 5 comprises a plurality of material grooves 51. The battery pole piece 6 is placed in the material groove 51. The battery pole piece 6 has a rectangular sheet structure. One of the length sides of the battery pole piece 6 is inserted into the material groove 51. The other length side is outside the material groove 51. When the pulse discharge assembly 3 moves above the material fixture 5, the clamp head 32 can clamp the length side of the battery pole piece 6 outside the material groove 51. In actual application, two second sensors can be arranged on the second horizontal section 133 of the guide groove 13 at intervals. When the second sensor close to the head of the second horizontal section 133 detects the pulse discharge assembly 3, that is, the pulse discharge assembly 3 is in the unloading position, the clamp head 32 is opened at this time, and the battery pole piece 6 falls; when the second sensor close to the tail of the second horizontal section 133 detects the pulse discharge assembly 3, that is, the pulse discharge assembly 3 is in the loading position, the clamp head 32 is closed at this time, and the clamp head 32 clamps the battery pole piece 6, thereby achieving the replacement of the battery pole piece 6.

[0049] In order to facilitate the loading of the battery pole piece 6, the plurality of material grooves 51 are arranged at intervals along the first direction. The gap between the adjacent two battery pole pieces 6 is used to avoid the movement of the clamp head 32. The first direction is perpendicular to the extension direction of the water tank 4. Since the water tank 4 is a circular ring, the first direction is the radial direction of the water tank 4. In actual application, the material fixture 5 can be driven to move by using a belt conveying mechanism to achieve feeding. At the same time, in order to avoid the interference between the clamp head 32 and the battery pole piece 6 to be replaced during the movement, the shape of the material groove 51 is matched with the movement track of the clamp head 32. That is, the length direction of the material groove 51 is arc-shaped, and the length side of the battery pole piece 6 is also curved and arc-shaped after being placed in the material groove 51.

[0050] Optionally, referring to Figure 1 As shown, two baffles 41 are arranged in the water tank 4 at intervals. The water tank 4 is divided into two water storage chambers by using the baffles 41. One of the water storage chambers contains water, and the other water storage chamber does not contain water. In actual application, the pulse discharge assembly 3 is lowered to move into the water storage chamber containing water to separate and process the battery pole piece 6. The processed pulse discharge assembly 3 is raised to move above the water storage chamber without water. The water dripping from the battery pole piece 6 can be collected by the water storage chamber without water. In addition, a filter screen can be arranged in the water storage chamber without water to collect the positive current collector after the separation and processing.

[0051] Optionally, in another embodiment, the guide assembly 1 can also be a drive component with a telescopic function, such as a cylinder, hydraulic cylinder, or electric telescopic component. One end of the guide assembly 1 is connected to the second connecting rod 22, and the other end is connected to the pulse discharge assembly 3. The telescopic movement of the guide assembly 1 drives the pulse discharge assembly 3 to move up and down.

[0052] Optionally, in another embodiment, the water tank 4 is rectangular, meaning its extension direction is a straight line. Correspondingly, the housing 12 is a flat plate structure, with its length parallel to the extension direction of the water tank 4, and the housing 12 is located directly above the water tank 4. A guide rail is provided on the housing 12, with its length parallel to the extension direction of the water tank 4. The drive assembly 2 is mounted on the guide rail and can move along the length of the guide rail. The drive assembly 2 drives the guide assembly 1 and the pulse discharge assembly 3 to reciprocate along the length of the housing 12. Under the guidance of the guide assembly 1, the pulse discharge assembly 3 also moves up and down, so that the battery electrode 6 can be selectively immersed in the water.

[0053] The beneficial effects of this embodiment are as follows: by setting the guide component 1 to drive the pulse discharge component 3 to move up and down, and by setting the drive component 2 to drive the pulse discharge component 3 to move along the extension direction of the water tank 4, the active material of the battery electrode 6 is in motion in the water during the separation process. Under the disturbance of the water, the active material can be promoted to fall off the battery electrode 6 into the water. At the same time, during the movement of the battery electrode 6 along the extension direction of the water tank 4, the battery electrode 6 is alternately located below and above the water surface to perform pulse discharge and change clamping on the battery electrode 6. This structure helps to improve the continuity of the separation process of the battery electrode 6, thereby improving production efficiency.

[0054] like Figure 1 and Figure 6 As shown in the embodiment of this application, a battery electrode recycling method is also provided, applied to a device for high-voltage pulse separation of battery electrodes. This device has a loading position, a separation position, and a dropping position sequentially distributed along the extension direction of the water tank 4. The separation position corresponds to the first horizontal section 131 of the guide groove 13. The pulse discharge assembly 3 performs pulse discharge on the battery electrode 6 at the separation position to achieve separation of the active material. The loading position and the dropping position are connected and spaced apart from the separation position. The loading position and the dropping position correspond to the second horizontal section 133 in the guide groove 13. When the pulse discharge assembly 3 is at the dropping position, the clamp 32 releases the processed battery electrode 6; when the pulse discharge assembly 3 is at the loading position, the clamp 32 picks up the battery electrode 6 to be processed from the material jig 5. The area between the separation position and the dropping position corresponds to the rising section 132 in the guide groove 13, and the area between the separation position and the loading position corresponds to the falling section 134 in the guide groove 13. The drive assembly 2 drives the pulse discharge assembly 3 to rotate clockwise.

[0055] Optionally, the battery pole piece recycling method comprises the following steps:

[0056] Step S1, the pulse discharge assembly 3 picks up the battery pole piece 6 to be processed from the upper loading position. The pulse discharge assembly 3 rotates in the clockwise direction to above the material fixture 5. The clamping head 32 is in the open state, and the two electrode plates in the clamping head 32 are respectively located on the two sides of the battery pole piece 6. When the guide wheel 112 triggers the second sensor, the clamping head 32 is closed to clamp the battery pole piece 6.

[0057] Step S2, the driving assembly 2 drives the pulse discharge assembly 3 to move along the extension direction of the water tank 4 (i.e. clockwise movement), and the guide assembly 1 drives the pulse discharge assembly 3 to descend. During this process, the movement path of the pulse discharge assembly 3 corresponds to the descending section 134 of the guide groove 13. The pulse discharge assembly 3 moves from the upper loading position to the separation position, and the battery pole piece 6 is immersed in water. When the pulse discharge assembly 3 moves to the separation position, the guide wheel 112 triggers the first sensor, so that the power source performs pulse discharge on the battery pole piece 6, and the active material is separated from the battery pole piece 6.

[0058] Step S3, the driving assembly 2 continues to drive the pulse discharge assembly 3 to move along the extension direction of the water tank 4 (i.e. clockwise movement), and the guide assembly 1 drives the pulse discharge assembly 3 to ascend. During this process, the movement path of the pulse discharge assembly 3 corresponds to the ascending section 132 of the guide groove 13. The pulse discharge assembly 3 moves from the separation position to the lower loading position, and the battery pole piece 6 is separated from the water. When the pulse discharge assembly 3 moves to the lower loading position, the guide wheel 112 triggers the second sensor, so that the clamping head 32 is opened to release the battery pole piece 6. The battery pole piece 6 is collected by the filter screen below.

[0059] After the pulse discharge assembly 3 releases the processed battery pole piece 6, it continues to move towards the upper loading position, and the cycle is repeated to realize continuous operation.

[0060] In order to enable the clamping head 32 to smoothly clamp the battery pole piece 6 at the upper loading position, the pulse discharge assembly is stopped for a time T when it is at the upper loading position. The length of the time T can be flexibly selected according to the operation of the device for separating the battery pole piece by high-voltage pulse, and the optional length range is 1-3s.

[0061] Optionally, the device for separating the battery pole piece by high-voltage pulse comprises two pulse discharge assemblies 3. The two pulse discharge assemblies 3 are oppositely arranged on the shell 12. When one of the pulse discharge assemblies 3 moves to the separation position, the other pulse discharge assembly 3 moves to the upper loading position. That is, the pulse discharge assembly 3 stops at the upper loading position and the separation position for a time T, and the value of T is in the range of 1-3s.

[0062] In this embodiment, in the case of separating and processing the active material of the battery pole piece 6, the battery pole piece 6 is in a moving state in the water, and under the disturbance action of the water, the active material can be promoted to fall off from the battery pole piece 6 to the water. At the same time, in the process of the movement of the battery pole piece 6 along the extension direction of the water tank 4, the battery pole piece 6 is alternately located below and above the water surface, so as to pulse discharge and replace the clamping of the battery pole piece 6. The structure is beneficial to improve the continuity of the separation processing of the battery pole piece 6, and further improve the production efficiency.

Claims

1. A device for separating battery electrodes using a high-voltage pulse, characterized in that, include: Water tank (4), the contents of which contain water; The pulse discharge assembly (3) is located above the water tank (4). The pulse discharge assembly (3) includes a power source and two spaced clamps (32). The clamps (32) are electrically connected to the power source. The clamps (32) are used to clamp the battery electrode (6). The power source can pulse discharge the battery electrode (6) through the clamps (32). A guide component (1) is connected to the pulse discharge component (3). The guide component (1) is used to drive the pulse discharge component (3) to move up and down and enable the battery electrode (6) to be selectively immersed in water. A drive assembly (2) is connected to the guide assembly (1) and is used to drive the pulse discharge assembly (3) to move along the extension direction of the water tank (4). The guide assembly (1) includes a housing (12) and a first connecting rod (11). The pulse discharge assembly (3) is mounted on the first connecting rod (11). The drive assembly (2) includes a motor (21) and a second connecting rod (22). The motor (21) is mounted on the housing (12) and is connected to the second connecting rod (22) in a transmission manner. The motor (21) is used to drive the second connecting rod (22) to rotate along the circumferential direction of the housing (12). The first connecting rod (11) is inserted into the second connecting rod (22). The first connecting rod (11) can move vertically relative to the second connecting rod (22). The housing (12) is provided with a guide groove (13). The first connecting rod (11) is slidably connected to the guide groove (13) or rolledly connected to it.

2. The apparatus for separating battery electrodes by high-voltage pulse according to claim 1, characterized in that, The water tank (4) is circular.

3. The apparatus for separating battery electrodes by high-voltage pulse according to claim 1, characterized in that, The first connecting rod (11) includes a rod body, a connector (111) and a guide wheel (112). One end of the connector (111) is connected to the rod body. The guide wheel (112) is rotatably disposed at the end of the connector (111) away from the rod body. The guide wheel (112) is inserted into the guide groove (13) and is made to roll in connection with the groove wall of the guide groove (13).

4. The apparatus for separating battery electrodes by high-voltage pulse according to claim 1, characterized in that, Along the length of the guide groove (13), the guide groove (13) includes a first horizontal section (131), a rising section (132), a second horizontal section (133), and a descending section (134) connected in sequence. The distance between the first horizontal section (131) and the water tank (4) is smaller than the distance between the second horizontal section (133) and the water tank (4). When the first connecting rod (11) moves along the first horizontal section (131), the battery electrode (6) is submerged in water. When the first connecting rod (11) moves along the second horizontal section (133), the battery electrode (6) is above the water surface.

5. The apparatus for separating battery electrodes by high-voltage pulse according to claim 4, characterized in that, The first horizontal segment (131) is provided with a first sensor, which is electrically connected to the power supply.

6. The apparatus for separating battery electrodes by high-voltage pulse according to claim 1, characterized in that, There are multiple pulse discharge components (3), and the multiple pulse discharge components (3) are distributed at intervals along the extension direction of the water tank (4). Each pulse discharge component (3) is provided with a first connecting rod (11). All the first connecting rods (11) are connected to the driving component (2) so that the driving component (2) can drive all the pulse discharge components (3) to move.

7. The apparatus for separating battery electrodes by high-voltage pulse according to any one of claims 1 to 6, characterized in that, It also includes a material fixture (5), which includes a plurality of material slots (51) spaced apart along a first direction, the first direction being perpendicular to the extension direction of the water tank (4), the battery electrode (6) being placed in the material slot (51), and the chuck (32) clamping the battery electrode (6) from the material fixture (5).

8. A method for recycling battery electrode sheets, characterized in that, An apparatus for separating battery electrodes by high-voltage pulse as described in any one of claims 1 to 7, comprising a loading position, a separation position, and a discharge position sequentially distributed along the extension direction of the water tank (4), comprising the following steps: Step S1: The pulse discharge assembly (3) clamps the battery electrode (6) from the loading position. Step S2: The driving component (2) drives the pulse discharge component (3) to move along the extension direction of the water tank (4), and the guiding component (1) drives the pulse discharge component (3) to descend. The pulse discharge component (3) moves from the loading position to the separation position and immerses the battery electrode (6) in water. When the pulse discharge component (3) is located in the separation position, the pulse discharge component (3) pulse discharges to the battery electrode (6) to separate the active material on the battery electrode (6); Step S3: The driving component (2) drives the pulse discharge component (3) to move along the extension direction of the water tank (4), and the guiding component (1) drives the pulse discharge component (3) to rise. The pulse discharge component (3) moves from the separation position to the dropping position and causes the battery electrode (6) to detach from the water. When the pulse discharge assembly (3) is located at the material drop position, the chuck (32) releases the battery electrode (6).

9. The battery electrode recycling method according to claim 8, characterized in that, When the pulse discharge component (3) is located at the loading position and the separation position, the residence time is T.

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