High-voltage pulse separation device for positive electrode sheet of retired lithium-ion battery

Abstract

Disclosed in the present application is a high-voltage pulse separation device for a positive electrode sheet of a retired lithium-ion battery. The device comprises a tray assembly (1), a cutting mechanism (2) and a high-voltage pulse mechanism (3), wherein the tray assembly (1) is formed by assembling tray bodies (11), the upper surface of the tray assembly (1) serving as a support flat surface, which is configured to support an electrode sheet (100) to be cut; a first fixing plate (12) is further provided on the upper surface of each tray body (11), and the side edge of the electrode sheet (100) is fastened between the first fixing plate (12) and the tray body (11); a cutter (22) is disposed above a cutting operation zone, and the cutter (22) can move to be inserted into a gap between two tray bodies (11), thus cutting the electrode sheet (100) into two electrode sheets (200) to be pulsed; and a pulse operation zone of the high-voltage pulse mechanism (3) is configured for placement of the tray body (11), and two pulse electrodes (34) are respectively connected to two ends of each electrode sheet (200) to be pulsed.

Description

High-voltage pulse separation device for retired lithium-ion battery positive plates Technical Field

[0001] The present application relates to the field of lithium battery recycling technology, for example, to a device for separating retired lithium-ion battery positive plates using high-voltage pulses. Background Art

[0002] The positive electrode of a lithium-ion battery includes aluminum foil, and an active material layer is provided on the surface of the aluminum foil. By recycling retired lithium-ion batteries, the cobalt, lithium and other elements contained in the active material layer can be recovered. On the one hand, it can reduce problems such as excessive resource consumption and environmental pollution. On the other hand, the separated cobalt, lithium and other elements can be used to manufacture new lithium-ion batteries, reducing the raw material cost of subsequent lithium-ion batteries.

[0003] High-voltage pulse discharge is a method for processing and recycling the positive electrode sheets of lithium-ion batteries. Compared to hydrometallurgy, high-voltage pulse discharge can reduce the use of chemical solvents. High-voltage pulse discharge requires cutting the positive electrode sheet into multiple small pieces. Each small piece is fixed between the positive and negative electrodes of the device and subjected to high-voltage pulse treatment. After treatment, the small piece is removed and replaced with a new one to be processed. Due to the thickness of the small piece, it is easy to fold during handling. The active material layer in the folded part is not easy to separate from the aluminum foil, so the folded part needs to be smoothed. This increases the time required to replace the small piece and reduces processing efficiency.

[0004] Summary of the Invention

[0005] An embodiment of the present application provides a high-voltage pulse separation device for retired lithium-ion battery positive electrode sheets, which is not prone to bending when processing small pieces cut from positive electrode sheets.

[0006] This application adopts the following technical solutions:

[0007] Provided is a high-voltage pulse separation device for retired lithium-ion battery positive plates, comprising:

[0008] A tray assembly, the tray assembly comprising at least two tray bodies, the tray bodies being spliced ​​together to form the tray assembly, the upper surface of the tray assembly being a support plane, the support plane being configured to support the electrode pieces to be cut, the upper surface of the tray body being further provided with a first fixing plate, the side edges of the electrode pieces to be cut being clamped between the first fixing plate and the tray body;

[0009] A cutting mechanism, comprising a cutting base and a cutter, wherein the cutting base has a cutting work area, the cutting work area is configured to place the tray assembly, and the cutter is disposed above the cutting work area and is movable to be inserted into a gap between the two tray bodies to cut and separate the electrode piece to be cut into two electrode pieces to be pulsed;

[0010] A high-voltage pulse mechanism includes a high-voltage pulse base and two pulse electrodes. A pulse operating area is provided on the high-voltage pulse base. The pulse operating area is configured to place the tray body. The two pulse electrodes are respectively connected to the two ends of the electrode to be pulsed.

[0011] As an optional solution for a device for separating retired lithium-ion battery positive plates using high-voltage pulses, the tray body has a spliced ​​side surface, the spliced ​​side surface is protruding with a plurality of protrusions, and two adjacent protrusions are spaced apart to form a recess, and the protrusions are respectively inserted into the recess of the other spliced ​​side surface, and the two tray bodies are interlocked;

[0012] The pulse electrode to be pulsed includes a connecting portion and multiple protrusions. The connecting portion is clamped between the first fixed plate and the tray body. The multiple protrusions are connected through the connecting portion. The connecting portion is electrically connected to one of the pulse electrodes, and all the protrusions are electrically connected to another pulse electrode.

[0013] As an optional solution for a high-voltage pulse separation device for retired lithium-ion battery positive plates, the first fixed plate has a first side surface close to the center of the tray body, and the first side surface is recessed with a plurality of first avoidance grooves, which pass through the upper and lower surfaces of the first fixed plate.

[0014] As an optional solution for a high-voltage pulse separation device for retired lithium-ion battery positive plates, the first fixing plate is a metal plate, a first electrode connecting column is provided on the first fixing plate, the first electrode connecting column is connected to the pulse electrode, a plurality of first avoidance grooves are provided, and each of the first avoidance grooves is directly opposite to the recessed position.

[0015] As an optional solution for a high-voltage pulse separation device for retired lithium-ion battery positive plates, a second fixing plate is provided on the high-voltage pulse base, and the end of the protrusion away from the connecting portion is clamped between the second fixing plate and the tray body. The second fixing plate is a metal plate, and a second electrode connecting column is provided on the second fixing plate, and the second electrode connecting column is connected to the pulse electrode.

[0016] As an optional solution for a high-voltage pulse separation device for retired lithium-ion battery positive plates, one end of the first fixing plate is hinged to the tray body, and the other end of the first fixing plate is detachably connected to the tray body via a first locking member.

[0017] As an optional solution for a high-voltage pulse separation device for retired lithium-ion battery positive plates, the first locking member includes a first locking pin, which is rotatably set on the first fixed plate, and a first locking block is set at the end of the first locking pin away from the first fixed plate. A first locking slot is set on the tray body, and a first limiting block is set at the notch of the first lock slot. The notch size of the first lock slot is smaller than the size of the bottom of the first lock slot. The first locking block is inserted into the first lock slot, and the first locking pin is rotated until the first locking block abuts against the first limiting block, and the first locking member is fixed to the tray body.

[0018] As an optional solution for the high-voltage pulse separation device for retired lithium-ion battery positive plates, the two tray bodies have the same size.

[0019] As an optional solution for a high-voltage pulse separation device for retired lithium-ion battery positive plates, a first positioning block is provided on the cutting base, and the first positioning block abuts against the side of the tray body, or a first positioning groove is provided on the cutting base, and the first positioning groove is configured to place the tray assembly.

[0020] As an optional solution for a high-voltage pulse separation device for retired lithium-ion battery positive plates, a second positioning block, a second fixing plate and a pad are provided on the high-voltage pulse base. The second positioning block abuts against the side of the tray body. When the tray body and the electrode to be pulsed are placed in the pulse operation area, the upper surface of the pad is flush with the upper surface of the electrode to be pulsed, and the second fixing plate is provided on the pad.

[0021] As an optional solution for a high-voltage pulse separation device for retired lithium-ion battery positive plates, a second positioning groove and a second fixing plate are provided on the high-voltage pulse base. The second positioning groove is used to place the tray assembly. When the tray body and the electrode to be pulsed are placed in the second positioning groove, the upper surface of the electrode to be pulsed is flush with the upper surface of the high-voltage pulse base, and the second fixing plate is provided on the upper surface of the high-voltage pulse base.

[0022] As an optional solution for a device for separating retired lithium-ion battery positive plates using high-voltage pulses, the shape of the cutter cross section is consistent with the shape of the gap between the two tray bodies, and the electrode to be pulsed is cut and formed in one step. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present application will be described below with reference to the accompanying drawings and embodiments.

[0024] FIG1 is a schematic diagram of a high-voltage pulse separation device for retired lithium-ion battery positive plates according to an embodiment of the present application.

[0025] FIG2 is a schematic diagram of the tray assembly according to an embodiment of the present application.

[0026] FIG3 is a schematic diagram of the separation of the two tray bodies according to an embodiment of the present application.

[0027] FIG4 is a schematic diagram of the tray body according to an embodiment of the present application.

[0028] FIG5 is a schematic diagram of the electrode to be cut according to an embodiment of the present application.

[0029] FIG6 is a schematic diagram of the cutter according to an embodiment of the present application.

[0030] FIG7 is a schematic front cross-sectional view of the pulse assembly according to an embodiment of the present application.

[0031] FIG8 is a schematic side cross-sectional view of the pulse assembly according to an embodiment of the present application.

[0032] FIG9 is a schematic diagram of the first locking slot according to an embodiment of the present application.

[0033] FIG10 is a schematic diagram of a cutting base according to an embodiment of the present application.

[0034] FIG11 is a schematic diagram of a cutting base according to another embodiment of the present application.

[0035] FIG12 is a schematic diagram of the tray body, the pulsed pole piece and the second fixed plate according to an embodiment of the present application.

[0036] FIG13 is a schematic front cross-sectional view of a pulse assembly and a high-voltage pulse mechanism according to an embodiment of the present application.

[0037] FIG14 is a schematic side cross-sectional view of a high-voltage pulse mechanism according to an embodiment of the present application.

[0038] FIG15 is a schematic top view of a high-voltage pulse base according to an embodiment of the present application.

[0039] FIG16 is a schematic front cross-sectional view of a pulse assembly and a high-voltage pulse mechanism according to another embodiment of the present application.

[0040] In the figure: 100, electrode to be cut; 200, electrode to be pulsed; 2001, raised portion; 2002, connecting portion; 1, tray assembly; 11, tray body; 111, protrusion; 112, recess; 113, first locking groove; 114, first limiting block; 115, splicing side; 12, first fixing plate; 121, first avoidance groove; 122, first electrode connecting column; 13, first locking member; 131, first locking pin; 132, first locking block; 133, first cap; 2, cutting mechanism; 21, cutting base; 211, first positioning block; 212, first positioning groove; 22, cutter; 3, high-voltage pulse mechanism; 31, high-voltage pulse base; 311, second positioning block; 312, pad; 313, Second positioning groove; 314, second locking groove; 32, second fixing plate; 321, second electrode connecting column; 33, second locking member; 34, pulse electrode; 4, manipulator. DETAILED DESCRIPTION

[0041] The technical solutions of the embodiments of the present application will be described below with reference to the accompanying drawings.

[0042] In the description of this application, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection between two elements or the interaction relationship between two elements.

[0043] As shown in Figures 1 to 7 and Figures 12 to 16, the present application provides a high-voltage pulse separation device for retired lithium-ion battery positive electrodes, including a tray assembly 1, a cutting mechanism 2 and a high-voltage pulse mechanism 3. The tray assembly 1 includes at least two tray bodies 11, which are spliced ​​to form a tray assembly 1. The upper surface of the tray assembly 1 is a support plane, which is configured to support the electrode 100 to be cut. The upper surface of the tray body 11 is further provided with a first fixing plate 12, and the side of the electrode 100 to be cut is clamped between the first fixing plate 12 and the tray body 11; the cutting mechanism 2 includes The cutting base 21 and the cutter 22, the cutting base 21 has a cutting work area, the cutting work area is set to place the tray assembly 1, the cutter 22 is set above the cutting work area, the cutter 22 can be moved to insert into the gap between the two tray bodies 11, so that the electrode 100 to be cut is cut and separated into two electrodes to be pulsed 200; the high-voltage pulse mechanism 3 includes a high-voltage pulse base 31 and two pulse electrodes 34, the high-voltage pulse base 31 is provided with a pulse operation area, the pulse operation area is set to place the tray body 11, and the two pulse electrodes 34 are respectively connected to the two ends of the electrode 200 to be pulsed. By setting up two tray bodies 11, after the electrode piece 100 to be cut is placed on the tray assembly 1 spliced ​​together by the two tray bodies 11, the cutter 22 can be inserted into the gap between the two tray bodies 11, and the electrode piece 100 to be cut can be cut and separated along the shape of the two tray bodies 11. Then, the electrode piece 200 to be pulsed and the tray body 11 are moved together by the robot 4 to the pulse operation area for pulse operation. During the cutting operation and the pulse operation, the tray body 11 is the carrier of the same electrode piece from beginning to end, avoiding the movement of the electrode piece individually. This can reduce the probability of the electrode piece being folded, thereby reducing the steps of smoothing the electrode piece and improving processing efficiency.

[0044] In this embodiment, the positive electrode sheet of the recycled retired lithium-ion battery includes aluminum foil, and active material layers are provided on both sides of the aluminum foil. The active material layers contain elements such as cobalt. The high-voltage pulse can separate the aluminum foil from the active material layer, thereby realizing the separation and recovery of lithium materials and other materials such as cobalt.

[0045] The tray body 11 has a splicing side surface 115, and the splicing side surface 115 is protruded with a plurality of protrusions 111. Two adjacent protrusions 111 are spaced apart to form a recess 112. The protrusions 111 are respectively inserted into the recess 112 of the other splicing side surface 115, so that the two tray bodies 11 are embedded to form a tray assembly 1. The electrode piece 100 to be cut is placed on the supporting plane of the tray assembly 1. The supporting plane of the tray assembly 1 carries the electrode piece 100 to be cut. The upper surface of the tray body 11 is provided with a first fixing plate 12. The side of the electrode piece 100 to be cut is clamped between the first fixing plate 12 and the tray body 11, which can prevent the electrode piece 100 to be cut from shifting. The cutting edge shape of the cut-to-shape electrode piece 200 to be pulsed is consistent with the edge shape of the tray body 11. The electrode piece 200 to be pulsed includes a connecting portion 2002. And multiple protrusions 2001, the connecting portion 2002 is clamped between the first fixed plate 12 and the tray body 11, the protrusion 2001 is located above the protrusion 111, and the multiple protrusions 2001 are connected through the connecting portion 2002. The connecting portion 2002 of the pulse electrode 200 to be pulsed is electrically connected to one of the pulse electrodes 34, and all the protrusions 2001 of the pulse electrode 200 to be pulsed are electrically connected to another pulse electrode 34. The protrusions 111 and recesses 112 are arranged on the two tray bodies 11, and the protrusions 111 and recesses 112 are interlocked and spliced ​​with each other, so that the cut edges of the formed pulse-waiting pole piece 200 can form a protrusion and recess 112 structure with the same shape as the edge of the tray body 11. The protrusion 2001 on the pulse-waiting pole piece 200 is the same shape as the protrusion 111 on the tray body 11. The protrusion 2001 on the pulse-waiting pole piece 200 is equivalent to the small piece in the related art. The connecting part 2002 connects multiple protrusions 2001. After the pulse-waiting pole piece 200 is connected to the pulse electrode 34, the multiple protrusions 2001 on the pulse-waiting pole piece 200 are equivalent to being connected in parallel, which is equivalent to connecting multiple small pieces in the related art in parallel at the same time, and performing high-voltage pulse treatment on multiple small pieces at the same time, which can improve the processing efficiency of the positive pole pieces of retired lithium-ion batteries.

[0046] Optionally, the two tray bodies 11 have the same size. By setting the two tray bodies 11 to have the same size, after the cutting operation of the cutter 22 is completed, each tray body 11 clamps the pole piece 200 to be pulsed. Each tray body 11, the pole piece 200 to be pulsed and the first fixed plate 12 are combined to form a pulse assembly to be pulsed. When the two tray bodies 11 are separated, the two pulse assemblies to be pulsed are exactly the same in shape, and the corresponding pole pieces 200 to be pulsed are also exactly the same in shape. This facilitates the positioning between the pulse assembly to be pulsed and the subsequent high-voltage pulse mechanism 3, and facilitates the subsequent high-voltage pulse operation. In this embodiment, the width of the protrusion 111 is 30 mm, and the length of the protrusion 111 is 80 mm. The width of the protrusion 2001 of the corresponding cut-to-shape pole piece 200 to be pulsed is 30 mm, and the length of the protrusion 2001 is 80 mm.

[0047] 2 and 4 , the first fixed plate 12 has a first side surface close to the center of the tray body 11. The first side surface is recessed with a plurality of first avoidance grooves 121, and the first avoidance grooves 121 run through the upper and lower surfaces of the first fixed plate 12. Since the first fixed plate 12 and the tray body 11 jointly clamp the connection portion 2002 of the pole piece to be pulsed 200, the surface of the pole piece to be pulsed 200 in this area is squeezed. In the case of a high-voltage pulse, the active material in the area where the connection portion 2002 of the pole piece to be pulsed is clamped and squeezed is not easy to fall off the aluminum foil. The provision of a plurality of first avoidance grooves 121 can reduce the contact area between the first fixed plate 12 and the pole piece to be pulsed 200, thereby allowing more active material on the active material layer to be separated from the aluminum foil, which is beneficial to improving the effect of separating the aluminum foil and the active material by the high-voltage pulse.

[0048] The first fixed plate 12 is a metal plate. A first electrode connecting column 122 is provided on the first fixed plate 12. The first electrode connecting column 122 is connected to the pulse electrode 34. A plurality of first avoidance grooves 121 are provided, and each first avoidance groove 121 is directly opposite to the recess 112. Since the connection portion 2002 of the electrode piece 200 to be pulsed is clamped between the first fixed plate 12 and the tray body 11, the connection portion 2002 of the first fixed plate 12 and the electrode piece 200 to be pulsed is tightly pressed against each other. The first electrode connecting column 122 is provided on the first fixed plate 12, and the pulse electrode 34 is connected to the electrode piece 200 to be pulsed through the first fixed plate 12. This can reduce the difficulty of electrical connection between the pulse electrode 34 and the electrode piece 200 to be pulsed, and facilitate operation. The provision of the first avoidance groove 121 will reduce the contact area between the first fixed plate 12 and the electrode piece 200 to be pulsed, increase the resistance in this area, and most of the current will flow to the electrode piece 200 to be pulsed. 00's raised portion 2001, each first avoidance groove 121 is arranged to be opposite to the position of the recess 112, that is, the first avoidance groove 121 is spaced from the raised portion 2001 of the pulsed electrode 200, so that the influence of the first avoidance groove 121 on the resistance value of the area where the current mainly flows can be reduced, thereby avoiding excessive heat in the contact area between the first fixed plate 12 and the pulsed electrode 200, avoiding the aluminum foil of the pulsed electrode 200 from heating up too much and melting (melting of the aluminum foil makes it difficult to effectively separate it from the active substance), reducing the influence of the first avoidance groove 121 on the high-voltage pulse operation, and ensuring the separation effect of the high-voltage pulse operation on the aluminum foil and the active substance.

[0049] 8 , in this embodiment, one end of the first fixing plate 12 is hinged to the tray body 11 via a rotating shaft, and the other end of the first fixing plate 12 is detachably connected to the tray body 11 via a first locking member 13. During operation, the two tray bodies 11 can be spliced ​​together to form an integral assembly, the first locking member 13 can be unlocked to allow the first fixing plate 12 to rotate, and then the electrode piece 100 to be cut can be placed on the integral assembly. The first fixing plate 12 can then be rotated to press against the edge of the electrode piece 100 to be cut. The first locking member 13 can then be locked. After the first fixing plate 12 is fixed to the tray body 11, the electrode piece 100 to be cut can be cut using a cutter 22.

[0050] Referring to Figures 8 and 9, optionally, the first locking member 13 includes a first locking pin 131, which is rotatably set on the first fixing plate 12, and a first locking block 132 is set at one end of the first locking pin 131 away from the first fixing plate 12, and a first locking slot 113 is provided on the tray body 11, and a first limiting block 114 is provided at the notch of the first locking slot 113, and the notch size of the first locking slot 113 is smaller than the size of the bottom of the first locking slot 113, and the first locking block 132 is inserted into the first locking slot 113, and the first locking pin 131 is rotated until the first locking block 132 abuts against the first limiting block 114, and the first locking member 13 is fixed to the tray body 11. In this embodiment, a first through hole is provided on the first fixing plate 12, and the first locking pin 131 passes through the first through hole. A first cap 133 is also provided on the end of the first locking pin 131 away from the first locking block 132. The diameter of the first cap 133 is larger than the diameter of the first through hole. The first cap 133 can prevent the first locking pin 131 from separating from the first fixing plate 12.

[0051] Referring to FIG10 , in one embodiment, a first positioning block 211 is provided on the cutting base 21 of the cutting mechanism 2, and the first positioning block 211 abuts against the side surface of the tray body 11; referring to FIG11 , in another embodiment, a first positioning groove 212 is provided on the cutting base 21, and the first positioning groove 212 is used to place the tray assembly 1. Since the cutter 22 is provided above the cutting base 21, the cutter 22 moves downward and is inserted into the gap between the two tray bodies 11 to achieve shearing of the electrode 100 to be cut. The provision of the first positioning block 211 or the first positioning groove 212 can facilitate the positioning between the tray body 11 and the cutter 22, avoid the positional offset between the electrode 100 to be cut and the cutter 22, and ensure the cutting effect of the electrode 100 to be cut.

[0052] Optionally, the cross-sectional shape of the cutter 22 of the cutting mechanism 2 is consistent with the shape of the gap between the two tray bodies 11. By setting the cross-sectional shape of the cutter 22 to be consistent with the shape of the gap between the two tray bodies 11, the electrode piece 100 to be cut can be separated into two electrode pieces 200 to be pulsed in a single cut, which improves cutting efficiency. In other embodiments, the cutter 22 can be a small-sized flat plate. In this case, the angle and position of the cutter 22 need to be continuously adjusted according to the edge shape of the tray body 11 to cut out the electrode piece 200 to be pulsed with a protrusion 2001. In this embodiment, the cutter 22 is bent into shape.

[0053] 13 and 14 , a second fixing plate 32 is provided on the high-voltage pulse base 31. The side of the electrode piece 200 to be pulsed away from the first fixing plate 12 is clamped between the second fixing plate 32 and the tray body 11. The second fixing plate 32 is a metal plate. A second electrode connecting post 321 is provided on the second fixing plate 32. The second electrode connecting post 321 is connected to the pulse electrode 34. By providing the second fixing plate 32, the electrode piece 200 to be pulsed can be temporarily fixed to the high-voltage pulse base 31 during pulse operation, facilitating the high-voltage pulse operation. Since the connecting portion 2002 of the electrode piece 200 to be pulsed is clamped between the second fixing plate 32 and the tray body 11, the connecting portion 2002 of the second fixing plate 32 and the electrode piece 200 to be pulsed is tightly abutted. The second electrode connecting post 321 is provided on the second fixing plate 32. The pulse electrode 34 is connected to the electrode piece 200 to be pulsed through the second fixing plate 32. This can reduce the difficulty of electrical connection between the pulse electrode 34 and the electrode piece 200 to be pulsed, making operation easier.

[0054] Optionally, the connection method between the second fixing plate 32 and the high-voltage pulse base 31 is similar to the connection method between the first fixing plate 12 and the tray body 11. One end of the second fixing plate 32 is hinged to the high-voltage pulse base 31 through a rotating shaft, and the other end of the second fixing plate 32 is detachably connected to the high-voltage pulse base 31 through a second locking piece 33. During operation, the second locking piece 33 can be unlocked first so that the second fixing plate 32 can be rotated, and then the tray body 11 and the electrode piece to be pulsed 200 are placed as a whole on the high-voltage pulse base 31, and then the second fixing plate 32 is rotated so that the second fixing plate 32 presses the edge of the electrode piece to be cut 100, and then the second locking piece 33 is locked so that the second fixing plate 32 presses and fixes the electrode piece to be pulsed 200, and then the pulse electrode 34 is connected to perform high-voltage pulse treatment on the electrode piece to be pulsed 200.

[0055] Optionally, the second locking member 33 has a similar structure to the first locking member 13. The second locking member 33 includes a second locking pin, which is rotatably mounted on the second fixing plate 32. Second locking blocks are disposed at both ends of the second locking pin away from the second fixing plate 32. A second locking slot 314 is disposed on the high-voltage pulse base 31. A second limiting block is disposed at the notch of the second locking slot 314. The notch size of the second locking slot 314 is smaller than the size of the bottom of the second locking slot 314. The second locking block is inserted into the second locking slot 314. The second locking pin is rotated until the second locking block abuts the second limiting block, thereby securing the second locking member 33 to the high-voltage pulse base 31. In this embodiment, a second through hole is disposed on the second fixing plate 32. The second locking pin extends through the second through hole. A second cap is further disposed at the end of the second locking pin away from the second locking block. The diameter of the second cap is larger than the diameter of the second through hole. The second cap can prevent the second locking pin from separating from the second fixing plate 32.

[0056] 12 to 15 , in one embodiment, a second positioning block 311, a second fixing plate 32, and a pad 312 are provided on the high-voltage pulse base 31. The second positioning block 311 abuts against the side surface of the tray body 11. When the tray body 11 and the electrode piece to be pulsed 200 are placed in the pulse operation area, the upper surface of the pad 312 is flush with the upper surface of the electrode piece to be pulsed 200, and the second fixing plate 32 is provided on the pad 312. The tray body 11 carries the electrode piece to be pulsed 200, and the electrode piece to be pulsed 200 is spaced apart from the high-voltage pulse base 31. The provision of the pad 312 can increase the height of the second fixing plate 32, making it easier for the second fixing plate 32 to press and fix the electrode piece to be pulsed 200. In this embodiment, a second locking pin is provided on the pad 312. 16 , in another embodiment, a second positioning groove 313 is provided on the high-voltage pulse base 31. The second positioning groove 313 is configured to place the tray assembly 1. When the tray body 11 and the electrode piece to be pulsed 200 are placed in the second positioning groove 313, the upper surface of the electrode piece to be pulsed 200 is flush with the upper surface of the high-voltage pulse base 31, and the second fixing plate 32 is provided on the upper surface of the high-voltage pulse base 31. By providing the second positioning groove 313, the second positioning groove 313 can reduce the height of the electrode piece to be pulsed 200, which can facilitate the second fixing plate 32 to press and fix the electrode piece to be pulsed 200.

[0057] In the description herein, the terms "upper," "lower," "left," "right," and other positions or relationships are based on the positions or relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0058] Throughout this specification, references to terms such as "an embodiment" or "example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0059] The technical principles of the present application are described above in conjunction with specific embodiments. These descriptions are only for the purpose of explaining the principles of the present application and should not be interpreted in any way as limiting the scope of protection of the present application.

Claims

1. A high-voltage pulse separation device for retired lithium-ion battery positive electrode sheets, comprising: A tray assembly (1), the tray assembly (1) comprising at least two tray bodies (11), the tray bodies (11) being spliced ​​together to form the tray assembly (1), the upper surface of the tray assembly (1) being a support plane, the support plane being arranged to support a pole piece (100) to be cut, the upper surface of the tray body (11) being further provided with a first fixing plate (12), the side edge of the pole piece (100) to be cut being clamped between the first fixing plate (12) and the tray body (11); A cutting mechanism (2), the cutting mechanism (2) comprising a cutting base (21) and a cutter (22), the cutting base (21) having a cutting work area, the cutting work area being arranged to place the tray assembly (1), the cutter (22) being arranged above the cutting work area, the cutter (22) being movable to be inserted into a gap between two tray bodies (11) so as to cut and separate the electrode piece (100) to be cut into two electrode pieces (200) to be pulsed; A high-voltage pulse mechanism (3), the high-voltage pulse mechanism (3) comprising a high-voltage pulse base (31) and two pulse electrodes (34), the high-voltage pulse base (31) being provided with a pulse operation area, the pulse operation area being configured to place the tray body (11), the two pulse electrodes (34) being respectively connected to two ends of the electrode piece (200) to be pulsed.

2. The high-voltage pulse separation device for retired lithium-ion battery positive electrode sheets according to claim 1, wherein: The tray body (11) has a splicing side surface (115), the splicing side surface (115) is protrudingly provided with a plurality of protrusions (111), two adjacent protrusions (111) are spaced to form a concave position (112), the protrusions (111) are respectively inserted into the concave position (112) of the other splicing side surface (115), and the two tray bodies (11) are embedded; The pulse-ready pole piece (200) comprises a connecting portion (2002) and a plurality of protrusions (2001), wherein the connecting portion (2002) is clamped between the first fixing plate (12) and the tray body (11). The protrusions (2001) are connected to each other via the connecting portion (2002), the connecting portion (2002) is electrically connected to one of the pulse electrodes (34), and all of the protrusions (2001) are electrically connected to another pulse electrode (34).

3. The high-voltage pulse separation device for retired lithium-ion battery positive electrode sheets according to claim 2, wherein: The first fixing plate (12) has a first side surface close to the center of the tray body (11), the first side surface is recessed with a plurality of first avoidance grooves (121), and the first avoidance grooves (121) penetrate the upper surface and the lower surface of the first fixing plate (12).

4. The high-voltage pulse separation device for retired lithium-ion battery positive electrode sheets according to claim 3, wherein: The first fixing plate (12) is a metal plate. A first electrode connecting column (122) is provided on the first fixing plate (12). The first electrode connecting column (122) is connected to the pulse electrode (34). A plurality of first avoidance grooves (121) are provided, and each of the first avoidance grooves (121) is directly opposite to the recess (112).

5. The high-voltage pulse separation device for retired lithium-ion battery positive electrode sheets according to claim 4, wherein: A second fixing plate (32) is arranged on the high-voltage pulse base (31); one end of the protrusion (2001) away from the connecting portion (2002) is clamped between the second fixing plate (32) and the tray body (11); the second fixing plate (32) is a metal plate; a second electrode connecting column (321) is arranged on the second fixing plate (32); and the second electrode connecting column (321) is connected to the pulse electrode (34).

6. The high-voltage pulse separation device for retired lithium-ion battery positive electrode sheets according to claim 2, wherein: One end of the first fixing plate (12) is hinged to the tray body (11), and the other end of the first fixing plate (12) is detachably connected to the tray body (11) via a first locking piece (13).

7. The high-voltage pulse separation device for retired lithium-ion battery positive electrode sheets according to claim 6, wherein: The first locking member (13) comprises a first locking pin (131), the first locking pin (131) is rotatably arranged on the first fixing plate (12), a first locking block (132) is arranged at one end of the first locking pin (131) away from the first fixing plate (12), a first locking groove (113) is arranged on the tray body (11), a first limiting block (114) is arranged at the notch of the first locking groove (113), the notch size of the first locking groove (113) is smaller than the size of the bottom of the first locking groove (113), the first locking block (132) is inserted into the first locking groove (113), the first locking pin (131) is rotated until the first locking block (132) abuts against the first limiting block (114), and the first locking member (13) is fixed to the tray body (11).

8. The high-voltage pulse separation device for retired lithium-ion battery positive electrode sheets according to any one of claims 1 to 7, wherein: The two tray bodies (11) have the same size.

9. The high-voltage pulse separation device for retired lithium-ion battery positive electrode sheets according to any one of claims 1 to 7, wherein: The cutting base (21) is provided with a first positioning block (211), the first positioning block (211) abutting against a side surface of the tray body (11), or the cutting base (21) is provided with a first positioning groove (212), the first positioning groove (212) being configured to place the tray assembly (1).

10. The high-voltage pulse separation device for retired lithium-ion battery positive electrode sheets according to any one of claims 1 to 7, wherein: The high-voltage pulse base (31) is provided with a second positioning block (311), a second fixing plate (32) and a cushion block (312); the second positioning block (311) is in contact with the side surface of the tray body (11); when the tray body (11) and the pole piece to be pulsed (200) are placed in the pulse operation area, the upper surface of the cushion block (312) is flush with the upper surface of the pole piece to be pulsed (200); and the second fixing plate (32) is arranged on the cushion block (312).

11. The high-voltage pulse separation device for retired lithium-ion battery positive electrode sheets according to any one of claims 1 to 7, wherein: The high-voltage pulse base (31) is provided with a second positioning groove (313) and a second fixing plate (32); the second positioning groove (313) is configured to place the tray assembly (1); when the tray body (11) and the pulse-to-be-pulsed pole piece (200) are placed in the second positioning groove (313), the upper surface of the pulse-to-be-pulsed pole piece (200) is flush with the upper surface of the high-voltage pulse base (31); and the second fixing plate (32) is arranged on the upper surface of the high-voltage pulse base (31).

12. The high-voltage pulse separation device for retired lithium-ion battery positive electrode sheets according to any one of claims 1 to 7, wherein: The shape of the cross section of the cutter (22) is consistent with the shape of the gap between the two tray bodies (11), and the pulsed pole piece (200) is cut and formed in one step.

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