Device for separating battery electrode sheet by high-voltage pulse, and battery electrode sheet recycling method

Abstract

The present application relates to a device for separating a battery electrode sheet by a high-voltage pulse, and a battery electrode sheet recycling method. The device for separating a battery electrode sheet by a high-voltage pulse 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 clamping heads (32) arranged at an interval, the clamp heads (32) are electrically connected to the power supply, and the clamp heads are configured to clamp a battery electrode sheet (6). The guide assembly (1) is configured to drive the pulse discharge assembly (3) to move up and down, and enable the battery electrode sheet (6) to be selectively immersed in water. The driving assembly (2) is configured to drive the pulse discharge assembly (3) to move along the length direction of the water tank (4).

Description

Device for separating battery pole pieces using high-voltage pulses and method for recycling battery pole pieces Technical Field

[0001] The present application relates to the field of battery recycling technology, for example, to a device for separating battery pole pieces using high-voltage pulses and a method for recycling battery pole pieces. Background Art

[0002] Lithium batteries are widely used in power vehicles, communications, energy storage and other fields, and are in a period of rapid development. The main components of a lithium battery are the positive electrode and the negative electrode. The positive electrode includes a positive electrode current collector and an active material coated on the positive electrode current collector. The active material contains rare elements such as lithium, cobalt, and nickel. In order to save mineral resources, it is usually necessary to recycle retired lithium batteries, especially to recycle the rare elements in the active material. One recycling method is to use a pulse discharge device connected to the positive electrode to perform pulse discharge on the positive electrode to cause the active material to fall off the positive electrode current collector. The pulse discharge device includes a water tank and a positive electrode and a negative electrode installed in the water tank. The positive electrode and the negative electrode are respectively clamped at both ends of the positive electrode to achieve circuit conduction. The water tank contains water, and the active material that falls off the positive electrode is suspended in the water so that the active material can be collected.

[0003] The related technology has the following shortcomings: Because the active material is made of powdered raw materials bonded together, the binder vaporizes due to heat after pulse discharge, causing the active material to detach and become suspended in water. As the concentration of active material in the water near the positive and negative electrodes increases, the active material tends to adhere to the positive electrode current collector and become difficult to remove. Furthermore, during the recycling process, the positive electrode sheets must be placed individually in water and mounted on the positive and negative electrodes, which is difficult to operate and results in low overall processing efficiency.

[0004] Summary of the Invention

[0005] The present application proposes a device for separating battery pole pieces by high-voltage pulses, which can smoothly remove active materials from battery pole pieces and achieve high efficiency in active material separation and treatment.

[0006] The present application also proposes a battery pole piece recycling method, which can smoothly remove the active material from the battery pole piece, and the efficiency of the active material separation and processing is high.

[0007] This application adopts the following technical solutions:

[0008] The present application provides a device for separating battery pole pieces by high-voltage pulses, comprising:

[0009] a water tank containing water;

[0010] A pulse discharge assembly, the pulse discharge assembly being located above the water tank and comprising a power supply and two spaced-apart clamps, the clamps being electrically connected to the power supply and configured to clamp a battery electrode sheet, and the power supply being capable of pulse-discharging the battery electrode sheet through the clamps;

[0011] a guide assembly connected to the pulse discharge assembly, the guide assembly being configured to drive the pulse discharge assembly to move up and down and enable the battery electrode to be selectively immersed in water;

[0012] A driving assembly is connected to the guide assembly, and the driving assembly is configured to drive the pulse discharge assembly to move along the extension direction of the water tank.

[0013] Optionally, the water tank is annular.

[0014] Optionally, the guide assembly includes a shell and a first connecting rod, the pulse discharge assembly is installed on the first connecting rod, the drive assembly includes a motor and a second connecting rod, the motor is installed on the shell, the motor is transmission-connected to the second connecting rod, the motor is configured to drive the second connecting rod to rotate along the circumferential direction of the shell, the first connecting rod is plugged into the second connecting rod, the first connecting rod can move in a vertical direction relative to the second connecting rod, a guide groove is provided on the shell, and the first connecting rod is slidingly connected or rollingly connected to the guide groove.

[0015] Optionally, the first connecting rod includes a rod body, a connecting member and a guide wheel, one end of the connecting member is connected to the rod body, the guide wheel is rotatably arranged at the end of the connecting member away from the rod body, the guide wheel is inserted into the guide groove, and the guide wheel is rollingly connected to the groove wall of the guide groove.

[0016] Optionally, along the length direction of the guide groove, the guide groove includes a first horizontal section, an ascending section, a second horizontal section and a descending section connected in sequence, and the distance between the first horizontal section and the water trough is smaller than the distance between the second horizontal section and the water trough. When the first connecting rod moves along the first horizontal section, the battery electrode is immersed in water; when the first connecting rod moves along the second horizontal section, the battery electrode is located above the water surface.

[0017] Optionally, the first horizontal section is provided with a first sensor, and the first sensor is electrically connected to the power supply.

[0018] Optionally, there are multiple pulse discharge components, and the multiple pulse discharge components are spaced apart along the extension direction of the water tank. Each pulse discharge component is correspondingly provided with a first connecting rod, and all the first connecting rods are connected to the driving component so that the driving component can drive all the pulse discharge components to move.

[0019] Optionally, a material jig is further included, which includes a plurality of material troughs spaced apart along a first direction, wherein the first direction is perpendicular to the extension direction of the water trough, the battery electrode is placed in the material trough, and the chuck clamps the battery electrode from the material jig.

[0020] The present application also provides a battery pole piece recycling method, which is applied to a device for separating battery pole pieces using high-voltage pulses. The device has a loading position, a separation position, and a discharge position distributed in sequence along the extension direction of a water tank. The method comprises the following steps:

[0021] Step S1, the pulse discharge component clamps the battery electrode from the loading position;

[0022] 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 loading position to the separation position, and immerses the battery electrode in water;

[0023] When the pulse discharge component is located at the separation position, the pulse discharge component pulse-discharges the battery electrode to separate the active material on the battery electrode;

[0024] 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 rise, and the pulse discharge assembly moves from the separation position to the drop position, and separates the battery electrode from the water;

[0025] When the pulse discharge assembly is located at the blanking position, the clamp releases the battery electrode.

[0026] Optionally, when the pulse discharge component is located at the loading position and the separation position, the residence time is T. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG1 is a schematic diagram of a device for separating battery pole pieces by high-voltage pulse according to an embodiment of the present application.

[0028] FIG2 is a schematic diagram of a pulse discharge assembly at a first angle according to an embodiment of the present application.

[0029] FIG3 is a schematic diagram of a pulse discharge assembly according to an embodiment of the present application at a second angle.

[0030] FIG4 is a schematic diagram of the expansion of the center line of the guide groove of an embodiment of the present application.

[0031] FIG5 is a schematic diagram of a material fixture according to an embodiment of the present application.

[0032] FIG6 is a top view of a device for separating battery pole pieces by high-voltage pulse according to an embodiment of the present application.

[0033] In the picture:

[0034] 1. Guide assembly; 11. First connecting rod; 111. Connecting piece; 112. Guide wheel; 12. Housing; 13. Guide groove; 131. First horizontal section; 132. Ascending section; 133. Second horizontal section; 134. Descending section; 2. Drive assembly; 21. Motor; 22. Second connecting rod; 3. Pulse discharge assembly; 31. Base; 32. Chuck; 4. Water tank; 41. Partition; 5. Material fixture; 51. Material trough; 6. Battery electrode. DETAILED DESCRIPTION

[0035] The technical solution of this application will be explained below with reference to the accompanying drawings and through specific implementation methods.

[0036] As shown in Figures 1 to 3, the present application provides a device for separating battery pole pieces by high-voltage pulses, which is configured to recycle active substances from battery pole pieces 6. The main components in a lithium battery are positive pole pieces and negative pole pieces, which are collectively referred to as battery pole pieces 6. In this embodiment, the object of recycling is the positive pole piece. The positive pole piece includes a positive electrode collector, an active substance, and an adhesive. The positive electrode collector is made of aluminum foil, and the active substance is attached to the surface of the positive electrode collector through an adhesive. During recycling, a large pulse current is passed through the positive pole piece, and the adhesive is melted by high temperature, thereby separating the active substance from the positive electrode collector, so as to achieve classified recycling of the active substance and the positive electrode collector. For the convenience of describing this scheme, the positive electrode collector with active substance attached and the positive electrode collector without active substance attached are both referred to as battery pole pieces 6.

[0037] The device for separating battery electrode sheets using high-voltage pulses 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 are used to drive the pulse discharge assembly 3. The pulse discharge assembly 3 is configured to clamp the battery electrode sheet 6 and apply pulse discharge to it to separate the active material from the positive electrode current collector. The water tank 4 is configured to collect the active material.

[0038] The water tank 4 is annular and contains water. The direction in which the water tank 4 extends is the circumferential direction of the water tank 4. During recycling, the battery electrodes 6 are immersed in water and pulse-discharged, causing the released active material to be suspended in the water. Once the active material content in the water reaches a set level, the water is filtered to recover the active material.

[0039] The guide assembly 1 includes a first connecting rod 11 and a housing 12. The housing 12 is cylindrical in structure, with a guide groove 13 provided on its sidewall. The guide groove 13 is a closed annular structure. The first connecting rod 11 includes a rod body, a connector 111, and a guide wheel 112. The connector 111 is configured to receive the guide wheel 112. One end of the connector 111 is fixedly connected to the rod body, and the guide wheel 112 is rotatably disposed at the end of the connector 111 facing away from the rod body. The guide wheel 112 is inserted into the guide groove 13 and is in rolling connection with the groove wall of the guide groove 13, enabling the first connecting rod 11 to 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 provided with a sliding connection to the guide groove 13, that is, a slider can be provided on the first connecting rod 11, which is inserted into the guide groove 13 and is in sliding connection with the groove wall of the guide groove 13.

[0040] 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 coaxial with the housing 12. The output end of the motor 21 is connected to the second connecting rod 22 by transmission means. The motor 21 and the second connecting rod 22 can be connected by a transmission mechanism such as 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 "L"-shaped and includes an integrally formed horizontal section and a vertical section. The horizontal section of the second connecting rod 22 extends in the horizontal direction, is connected to the motor 21, and the vertical section of the second connecting rod 22 extends in the vertical direction, and is connected to the first connecting rod 11. A mounting hole is provided on the first connecting rod 11, and the mounting hole is coaxial with the first connecting rod 11. The second connecting rod 22 is inserted into the mounting hole, that is, the first connecting rod 11 and the second connecting rod 22 are plugged into each other. The first connecting rod 11 is movable in a vertical direction relative to the second connecting rod 22. The first connecting rod 11 and the second connecting rod 22 are capable of telescopic movement in the vertical direction. When the drive assembly 2 drives the first connecting rod 11 to rotate along the circumference of the housing 12, the first connecting rod 11 is also driven by the guide wheel 112. While rotating along the circumference of the housing 12, the first connecting rod 11 is driven by the guide wheel 112 to move up and down in the vertical direction.

[0041] The housing 12 is positioned above the water tank 4, and the pulse discharge assembly 3 is mounted at the bottom of the first connecting rod 11. The pulse discharge assembly 3 is also positioned above the water tank 4. The pulse discharge assembly 3 moves synchronously with the first connecting rod 11, meaning its motion path matches the direction of the guide slot 13. The guide slot 13 and the guide assembly 1 form a grooved cam mechanism. In practice, the shape of the guide slot 13 can be tailored to the desired motion path of the pulse discharge assembly 3, resulting in a simple structure and flexible operation. In this embodiment, the guide assembly 1 is configured to drive the pulse discharge assembly 3 in a vertical motion, while the drive assembly 2 is configured to drive the pulse discharge assembly 3 in a circumferential direction of the housing 12. Driven by the guide assembly 1 and the drive assembly 2, the pulse discharge assembly 3 rotates and moves synchronously, allowing it to move along the direction of the guide slot 13. During its motion, the pulse discharge assembly 3 remains above the water tank 4. Even when the battery electrode 6 moves above the water surface after separation in the water, water adhering to the electrode 6 can still drip into the water tank 4. Since the water tank 4 is annular in shape, the circumferential direction of the water tank 4 is the extending direction of the water tank 4 .

[0042] The pulse discharge assembly 3 includes a base 31, a power supply and two clamps 32. The base 31 is mounted on the bottom of the first connecting rod 11, and the two clamps 32 are spaced apart on the base 31. The clamps 32 are configured to clamp the battery electrode 6. The clamps 32 include two electrode plates that can be opened and closed. The electrode plates are made of copper plates with good conductivity and heat resistance. The two clamps 32 are connected to the power supply through a high-voltage cable. The two clamps 32 are respectively a positive electrode clamp and a negative electrode clamp. When the two clamps 32 clamp the battery electrode 6, a current loop is formed between the power supply, the clamps 32 and the battery electrode 6. The power supply is a pulse power supply formed by a capacitor bank circuit. When working, the energy stored in the capacitor is used to discharge the battery electrode 6. The voltage of the power supply can be selected in the range of 20KV-30KV. Under the action of the pulse current, the battery electrode 6 is heated and the adhesive is decomposed by the heat to separate the active material from the positive electrode current collector. In practical applications, the voltage value of the power supply can be reasonably selected according to the heat resistance characteristics of the battery electrode 6. While ensuring the separation of the active material, it is also necessary to avoid the positive electrode current collector from being overheated and melting.

[0043] As shown in Figures 1 and 4 , the centerline of the guide groove 13 forms a curved shape when unfolded. The extension direction (lengthwise) of the centerline of the guide groove 13 corresponds to the motion path of the pulse discharge assembly 3. Along its length, the guide groove 13 comprises a first horizontal section 131, an ascending section 132, a second horizontal section 133, and a descending section 134, which are sequentially connected. Both the first horizontal section 131 and the second horizontal section 133 extend horizontally. When the guide wheel 112 moves within 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 remains unchanged, indicating that the pulse discharge assembly 3 is in horizontal motion. 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, meaning that the second horizontal section 133 is higher than the first horizontal section 131. The ascending section 132 and the descending section 134 are curved structures, both serving as a transition between the first horizontal section 131 and the second horizontal section 133. When the guide wheel 112 moves in the ascending section 132, the pulse discharge assembly 3 is in an ascending state. When the guide wheel 112 moves in the descending section 134, the pulse discharge assembly 3 is in a descending state. During the ascending and descending movement of the pulse discharge assembly 3, the battery electrode 6 can be selectively immersed in water. When the battery electrode 6 is immersed in water, pulse discharge is performed on the battery electrode 6 to achieve separation and recovery of active materials. When the battery electrode 6 is above the water surface, the processed positive electrode can be drained, recovered, replaced, and clamped.

[0044] When the first connecting rod 11 moves along the first horizontal section 131, the battery electrode 6 is submerged in the water. During this process, the power source discharges, and the active material separates from the battery electrode 6 and becomes suspended in the water. When the first connecting rod 11 moves along the second horizontal section 133, the battery electrode 6 remains above the water surface, allowing for the recovery of the treated positive electrode current collector and the replacement of a new battery electrode 6 in the pulse discharge assembly 3. The provision of the first horizontal section 131 facilitates control of the immersion depth of the battery electrode 6 in the water. Once the battery electrode 6 reaches a set depth in the water, horizontal movement maintains the set depth, preventing further descent. In practice, the battery electrode 6 undergoes separation processing in the upper layer of the water. The suspended active material gradually settles in the lower layer of the water. The movement of the battery electrode 6 in the upper layer of the water prevents agitation of the active material in the lower layer, thereby reducing the concentration of active material in the upper layer and extending the water replacement cycle in the water tank 4.

[0045] 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. During the separation process of the active material from the battery electrode 6, the battery electrode 6 is in motion within the water. The agitation of the water promotes the shedding of the active material from the battery electrode 6 into the water. Simultaneously, during the movement of the battery electrode 6 along the extension direction of the water tank 4, the battery electrode 6 alternates between being below and above the water surface, allowing for pulse discharge and replacement and clamping of the battery electrode 6. This structure facilitates the continuity of the separation process of the battery electrode 6, thereby improving production efficiency.

[0046] Optionally, there are multiple pulse discharge assemblies 3, spaced apart along the extension direction of the water tank 4. Each pulse discharge assembly 3 is provided with a corresponding first connecting rod 11, so that each pulse discharge assembly 3 is rollingly connected to the guide groove 13 via the first connecting rod 11. All first connecting rods 11 are connected to the second driving member 2. The second driving member 2 includes a motor and multiple second connecting rods 22 in transmission connection with the motor. The multiple second connecting rods 22 are arranged in a one-to-one correspondence with the multiple first connecting rods 11. This structure enables the driving assembly 2 to drive all pulse discharge assemblies 3. The provision of multiple pulse discharge assemblies 3 can make the connection between the workstations such as pulse discharge of battery electrode 6, recovery of positive electrode current collector, and replacement and clamping of battery electrode 6 more compact during the production process, thereby improving production efficiency. In an optional embodiment, there are two pulse discharge assemblies 3, and the two pulse discharge assemblies 3 are arranged opposite each other on the housing 12. While one pulse discharge assembly 3 is lowered into the water to perform pulse discharge on the battery electrode 6, the other pulse discharge assembly 3 rises above the water surface to perform replacement and clamping operations on the battery electrode 6.

[0047] Optionally, the pulse discharge component 3 also includes a first sensor, which is electrically connected to the power supply. A control circuit board is provided in the power supply, and the first sensor is connected to the control circuit board. The first sensor is configured to detect the position of the pulse discharge component 3. When the pulse discharge component 3 moves to a set position, the first sensor sends a signal to the control circuit board to start power discharge. The first sensor is mounted on the first horizontal section 131 of the guide groove 13. When the guide component 1 moves on the first horizontal section 131, the battery electrode 6 is immersed in water. The first sensor detects the position of the pulse discharge component 3 and sends a signal. The first sensor can be a touch switch, an infrared sensor, a laser sensor, etc.

[0048] Similarly, a second sensor can be provided on the second horizontal section 133 of the guide groove 13. The second sensor is electrically connected to the chuck 32. The second sensor detects 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.

[0049] Optionally, as shown in Figures 5 and 6, the device for separating battery electrodes by high-voltage pulses further includes a material jig 5. The material jig 5 is configured to store the battery electrodes 6. The material jig 5 is disposed in the corresponding area of ​​the second horizontal section 133 of the guide groove 13. When the pulse discharge assembly 3 moves to this area, the chuck 32 clamps the battery electrodes 6 from the material jig 5. The material jig 5 includes a plurality of material slots 51, in which the battery electrodes 6 are placed. The battery electrodes 6 are rectangular sheet-like structures, with one length side of the battery electrode 6 inserted into the material slot 51 and the other length side located outside the material slot 51. When the pulse discharge assembly 3 moves to the top of the material jig 5, the chuck 32 can clamp the length side of the battery electrode 6 located outside the material slot 51. In practical applications, two second sensors can be spaced apart on the second horizontal section 133 of the guide groove 13. When the second sensor near the head of the second horizontal section 133 detects the pulse discharge component 3, that is, the pulse discharge component 3 is located at the blanking position, the clamp 32 is opened at this time, and the battery electrode 6 falls; when the second sensor near the tail of the second horizontal section 133 detects the pulse discharge component 3, that is, the pulse discharge component 3 is located at the loading position, the clamp 32 is closed at this time, and the clamp 32 clamps the battery electrode 6 to realize the replacement of the battery electrode 6.

[0050] In order to facilitate the loading of the battery electrodes 6, a plurality of material troughs 51 are arranged at intervals along the first direction. The gap between two adjacent battery electrodes 6 is used to avoid the movement of the chuck 32. The first direction is perpendicular to the extension direction of the water trough 4. Due to the circular shape of the water trough 4, the first direction is the radial direction of the water trough 4. In practical applications, a belt conveyor mechanism can be used to drive the material fixture 5 to move to achieve feeding. At the same time, in order to avoid interference between the chuck 32 and the battery electrode 6 to be replaced during movement, the shape of the material trough 51 is coordinated with the movement trajectory of the chuck 32. That is, the length direction of the material trough 51 is arc-shaped, and after the battery electrode 6 is placed in the material trough 51, its length side is also bent into an arc shape.

[0051] Optionally, as shown in Figure 1, two partitions 41 are provided in the water tank 4 at intervals. The partition 41 is used to divide the water tank 4 into two water storage chambers. One of the water storage chambers contains water, and the other water storage chamber does not contain water. In actual applications, the pulse discharge assembly 3 moves downward to the water storage chamber with water to separate the battery pole piece 6. The treated pulse discharge assembly 3 moves upward to the top of the water storage chamber without water. 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 provided in the water storage chamber without water, and the positive electrode current collector after separation treatment can be collected by the filter screen.

[0052] Alternatively, in another embodiment, the guide assembly 1 may be a drive component with telescopic functionality, such as a pneumatic cylinder, hydraulic cylinder, or electric telescopic member. 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 upward and downward.

[0053] Optionally, in another embodiment, the water tank 4 is rectangular, that is, the extension direction of the water tank 4 is a straight line. Correspondingly, the shell 12 is a flat structure, the length direction of the shell 12 is parallel to the extension direction of the water tank 4, and the shell 12 is located directly above the water tank 4. A guide rail is provided on the shell 12, the length direction of the guide rail is parallel to the extension direction of the water tank 4, the drive assembly 2 is mounted on the guide rail, and the drive assembly 2 can move along the length direction of the guide rail. The drive assembly 2 drives the guide assembly 1 and the pulse discharge assembly 3 to reciprocate along the length direction of the shell 12. Under the guidance of the guide assembly 1, the pulse discharge assembly 3 also performs a lifting movement so that the battery electrode 6 can be selectively immersed in water.

[0054] The beneficial effects of this embodiment are as follows: the guide assembly 1 is provided to drive the pulse discharge assembly 3 to move up and down, and the drive assembly 2 is provided to drive the pulse discharge assembly 3 to move along the extension direction of the water tank 4. During the separation process of the active material of the battery electrode 6, the battery electrode 6 is in motion in the water, and the disturbance of the water promotes the active material 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, so as to perform pulse discharge and replace and clamp the battery electrode 6. This structure is conducive to improving the continuity of the separation process of the battery electrode 6, thereby improving production efficiency.

[0055] As shown in Figures 1 and 6, an embodiment of the present application also provides a battery electrode recovery method, which is applied to a device for high-voltage pulse separation of battery electrode sheets. The device is sequentially arranged with a loading position, a separation position, and a drop position 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 sheet 6 at the separation position to achieve separation of the active material. The loading position and the drop position are connected and both are separated by the separation position. The loading position and the drop position correspond to the second horizontal section 133 in the guide groove 13. When the pulse discharge assembly 3 is in the drop position, the chuck 32 releases the processed battery electrode sheet 6. When the pulse discharge assembly 3 is in the loading position, the chuck 32 clamps the battery electrode sheet 6 to be processed from the material fixture 5. The area between the separation position and the drop position corresponds to the ascending section 132 in the guide groove 13, and the area between the separation position and the loading position corresponds to the descending section 134 in the guide groove 13. The driving component 2 drives the pulse discharge component 3 to rotate in a clockwise direction.

[0056] Optionally, the battery electrode recycling method includes the following steps:

[0057] Step S1: The pulse discharge assembly 3 picks up the battery electrode 6 to be processed from the loading position. The pulse discharge assembly 3 rotates clockwise to the position above the material fixture 5. The chuck 32 is open, and the two electrode plates in the chuck 32 are positioned on either side of the battery electrode 6. When the guide wheel 112 triggers the second sensor, the chuck 32 closes to clamp the battery electrode 6.

[0058] In step S2, the drive assembly 2 drives the pulse discharge assembly 3 to move along the extension direction of the water tank 4 (i.e., clockwise), 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 loading position to the separation position, and the battery electrode 6 is immersed in water. When the pulse discharge assembly 3 moves to the separation position, the guide wheel 112 triggers the first sensor, causing the power supply to pulse discharge the battery electrode 6, and the active material is separated from the battery electrode 6.

[0059] In 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), and the guide assembly 1 drives the pulse discharge assembly 3 to rise. During this process, the movement path of the pulse discharge assembly 3 corresponds to the rising section 132 of the guide groove 13. The pulse discharge assembly 3 moves from the separation position to the blanking position, and separates the battery electrode 6 from the water. When the pulse discharge assembly 3 moves to the blanking position, the guide wheel 112 triggers the second sensor, causing the clamp 32 to open to release the battery electrode 6. The battery electrode 6 is collected by the filter below.

[0060] After releasing the processed battery pole piece 6, the pulse discharge component 3 continues to move toward the loading position, and repeats this cycle to achieve continuous operation.

[0061] In order to enable the clamp 32 to smoothly clamp the battery electrode 6 at the loading position, when the pulse discharge component is at the loading position, the dwell time T is set. The dwell time T corresponds to the dwell time that can be flexibly selected according to the operating conditions of the device for separating battery electrodes by high-voltage pulses, and the optional dwell time range is 1-3s.

[0062] Optionally, the high-voltage pulse separation device includes two pulse discharge assemblies 3. These two pulse discharge assemblies 3 are positioned opposite each other on the housing 12. When one pulse discharge assembly 3 moves to the separation position, the other pulse discharge assembly 3 moves to the loading position. In other words, the pulse discharge assembly 3 remains stationary at both the loading and separation positions for a time T, with T ranging from 1 to 3 seconds.

[0063] In this embodiment, when the active material of the battery electrode 6 is being separated, the battery electrode 6 is in motion in the water. The disturbance of the water promotes the shedding of the active material from the battery electrode 6 into the water. Simultaneously, as the battery electrode 6 moves along the extension direction of the water tank 4, the battery electrode 6 alternates between being below and above the water surface, thereby performing pulse discharge and replacement clamping of the battery electrode 6. This structure helps improve the continuity of the separation process of the battery electrode 6, thereby increasing production efficiency.

Claims

1. A device for separating battery pole pieces by high-voltage pulse, comprising: A water tank (4), wherein water is contained in the water tank (4); A pulse discharge assembly (3), the pulse discharge assembly (3) being located above the water tank (4), the pulse discharge assembly (3) comprising a power source and two spaced-apart clamps (32), the clamps (32) being electrically connected to the power source, the clamps (32) being configured to clamp a battery electrode sheet (6), and the power source being capable of pulse discharge to the battery electrode sheet (6) through the clamps (32); A guide assembly (1), the guide assembly (1) being connected to the pulse discharge assembly (3), the guide assembly (1) being configured to drive the pulse discharge assembly (3) to move up and down, and to enable the battery pole piece (6) to be selectively immersed in water; A driving component (2), the driving component (2) being connected to the guiding component (1), and the driving component (2) being configured to drive the pulse discharge component (3) to move along the extension direction of the water tank (4).

2. The device for separating battery pole pieces by high-voltage pulse according to claim 1, wherein: The water tank (4) is in the shape of a ring.

3. The device for separating battery pole pieces by high-voltage pulse according to claim 1, wherein: The guide assembly (1) comprises a shell (12) and a first connecting rod (11), the pulse discharge assembly (3) is mounted on the first connecting rod (11), the drive assembly (2) comprises a motor (21) and a second connecting rod (22), the motor (21) is mounted on the shell (12), the motor (21) is transmission-connected to the second connecting rod (22), the motor (21) is configured to drive the second connecting rod (22) to rotate along the circumferential direction of the shell (12), the first connecting rod (11) is plugged into the second connecting rod (22), the first connecting rod (11) can move in a vertical direction relative to the second connecting rod (22), the shell (12) is provided with a guide groove (13), the first connecting rod (11) is slidingly connected or rollingly connected to the guide groove (13).

4. The device for separating battery pole pieces by high-voltage pulse according to claim 3, wherein: The first connecting rod (11) comprises a rod body, a connecting member (111) and a guide wheel (112); one end of the connecting member (111) is connected to the rod body; the guide wheel (112) is rotatably arranged at an end of the connecting member (111) away from the rod body; the guide wheel (112) is inserted into the guide groove (13) and is rollingly connected to the groove wall of the guide groove (13).

5. The device for separating battery pole pieces by high-voltage pulse according to claim 3, wherein: Along the length direction of the guide groove (13), the guide groove (13) comprises a first horizontal section (131), an ascending section (132), a second horizontal section (133) and a descending section (134) which are connected in sequence; the distance between the first horizontal section (131) and the water trough (4) is smaller than the distance between the second horizontal section (133) and the water trough (4); when the first connecting rod (11) moves along the first horizontal section (131), the battery electrode sheet (6) is immersed in water; when the first connecting rod (11) moves along the second horizontal section (133), the battery electrode sheet (6) is located above the water surface.

6. The device for separating battery pole pieces by high-voltage pulse according to claim 5, wherein: The first horizontal section (131) is provided with a first sensor, and the first sensor is electrically connected to the power supply.

7. The device for separating battery pole pieces by high-voltage pulse according to claim 3, wherein: There are a plurality of pulse discharge components (3), and the plurality of pulse discharge components (3) are spaced apart along the extension direction of the water tank (4). Each of the pulse discharge components (3) is provided with a corresponding first connecting rod (11), and all of the first connecting rods (11) are connected to the driving component (2) so that the driving component (2) can drive all of the pulse discharge components (3) to move.

8. The device for separating battery pole pieces by high-voltage pulse according to any one of claims 1 to 7, further comprising a material fixture (5), wherein the material fixture (5) comprises a plurality of material troughs (51) spaced apart along a first direction, wherein the first direction is perpendicular to the extension direction of the water trough (4), the battery pole piece (6) is placed in the material trough (51), and the chuck (32) clamps the battery pole piece (6) from the material fixture (5).

9. A battery pole piece recycling method, applied to the high-voltage pulse battery pole piece separation device as claimed in any one of claims 1 to 8, wherein the device is provided with a loading position, a separation position and a discharge position in sequence along the extension direction of the water tank (4), and the method comprises the following steps: Step S1, the pulse discharge component (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 guide 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 the battery electrode (6) is immersed in water; When the pulse discharge component (3) is located at the separation position, the pulse discharge component (3) performs pulse discharge on the battery pole piece (6) to separate the active material on the battery pole piece (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 guide component (1) drives the pulse discharge component (3) to rise, and the pulse discharge component (3) moves from the separation position to the drop position, and the battery electrode (6) is separated from the water; When the pulse discharge assembly (3) is located at the blanking position, the clamp (32) releases the battery pole piece (6).

10. The battery pole piece recycling method according to claim 9, wherein: When the pulse discharge component (3) is located at the loading position and the separation position, the residence time T.

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