Device for separating positive plate of retired lithium ion battery by high-voltage pulse

Abstract

This application discloses a high-voltage pulse separation device for retired lithium-ion battery positive electrode sheets, including a tray assembly (1), a cutting mechanism (2), and a high-voltage pulse mechanism (3). The tray body (11) is spliced ​​to form the tray assembly (1). The upper surface of the tray assembly (1) is a support plane, which is set to support the electrode sheet (100) to be cut. The upper surface of the tray body (11) is also provided with a first fixing plate (12). The side of the electrode sheet (100) to be cut is clamped between the first fixing plate (12) and the tray body (11). The cutter (22) is set above the cutting working area. The cutter (22) can move to the gap between the two tray bodies (11) so that the electrode sheet (100) to be cut is cut and separated into two electrode sheets (200) to be pulsed. The pulse working area of ​​the high-voltage pulse mechanism (3) is set to place the tray body (11). The two pulse electrodes (34) are respectively connected to the two ends of the electrode sheet (200) to be pulsed.

Description

Technical Field

[0001] This application relates to the field of lithium battery recycling technology, for example to a device for high-voltage pulse separation of the positive electrode sheet of a retired lithium-ion battery. Background Technology

[0002] The positive electrode of a lithium-ion battery includes an aluminum foil with an active material layer on its surface. By recycling retired lithium-ion batteries, elements such as cobalt and lithium contained in the active material layer can be recovered. On the one hand, this can reduce excessive consumption of resources and environmental pollution. On the other hand, the separated cobalt and lithium 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 positive electrode sheets from lithium-ion batteries. Compared to hydrometallurgy, high-voltage pulse discharge reduces the use of chemical solvents. High-voltage pulse discharge requires cutting the positive electrode sheet into multiple small pieces. Each time, one small piece is fixed between the positive and negative electrodes of the device for high-voltage pulse processing. After processing, the small piece is removed and replaced with a new one. Because the small pieces are thin, they are prone to folding during handling. The active material layer covered by the folds is difficult to separate from the aluminum foil, so the folds need to be smoothed out. This increases the time required for replacing the small pieces and reduces processing efficiency. Summary of the Invention

[0004] This application provides a high-voltage pulse separation device for retired lithium-ion battery positive electrode sheets, which is less prone to bending when the positive electrode sheets are cut into small pieces.

[0005] The following technical solution is adopted in this application:

[0006] A high-voltage pulse separation device for retired lithium-ion battery positive electrode sheets is provided, comprising:

[0007] A tray assembly includes at least two tray bodies, which are spliced ​​together to form the tray assembly. The upper surface of the tray assembly is a support plane, which is configured to support the electrode sheet to be cut. The upper surface of the tray body is also provided with a first fixing plate, and the side of the electrode sheet to be cut is clamped between the first fixing plate and the tray body.

[0008] A cutting mechanism, comprising a cutting base and a cutter, wherein the cutting base has a cutting working area configured to hold the tray assembly, and the cutter is disposed above the cutting working area and is movable to be inserted into the gap between the two tray bodies to cut and separate the electrode to be cut into two electrode to be pulsed.

[0009] A high-voltage pulse mechanism includes a high-voltage pulse base and two pulse electrodes. The high-voltage pulse base is provided with a pulse working area, which is configured to place the tray body. The two pulse electrodes are respectively connected to the two ends of the electrode to be pulsed.

[0010] As an alternative solution for a high-voltage pulse separation device for retired lithium-ion battery positive electrode sheets, the tray body has a splicing side, and multiple protrusions are provided on the splicing side. Adjacent protrusions are spaced apart to form recesses, and the protrusions are respectively inserted into the recesses of another splicing side, so that the two tray bodies fit together.

[0011] The electrode to be pulsed includes a connecting part and a plurality of protrusions. The connecting part is clamped between the first fixing plate and the tray body. The plurality of protrusions are connected to each other through the connecting part. The connecting part is electrically connected to one of the pulse electrodes, and all of the protrusions are electrically connected to the other pulse electrode.

[0012] As an alternative solution for a high-voltage pulse separation device for retired lithium-ion battery positive electrode sheets, the first fixing plate has a first side surface near the center of the tray body, and the first side surface is recessed with a plurality of first clearance grooves, which penetrate the upper and lower surfaces of the first fixing plate.

[0013] As an alternative solution for a high-voltage pulse separation device for retired lithium-ion battery positive electrode sheets, the first fixing plate is a metal plate, and a first electrode connecting post is provided on the first fixing plate. The first electrode connecting post is connected to the pulse electrode. Multiple first clearance slots are provided, and each first clearance slot is directly opposite the recessed position.

[0014] As an alternative solution for a high-voltage pulse separation device for retired lithium-ion battery positive electrode sheets, a second fixing plate is provided on the high-voltage pulse base. The end of the protrusion away from the connecting part is clamped between the second fixing plate and the tray body. The second fixing plate is a metal plate, and a second electrode connecting post is provided on the second fixing plate. The second electrode connecting post is connected to the pulse electrode.

[0015] As an alternative solution for a high-voltage pulse separation device for retired lithium-ion battery positive electrode sheets, 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.

[0016] As an optional solution for a high-voltage pulse separation device for retired lithium-ion battery positive electrode sheets, the first locking member includes a first locking pin, which is rotatably mounted on the first fixed plate. A first locking block is provided at the end of the first locking pin away from the first fixed plate. A first locking groove is provided on the tray body, and a first limiting block is provided at the opening of the first locking groove. The opening size of the first locking groove is smaller than the bottom size of the first locking groove. The first locking block is inserted into the first locking groove, and the first locking pin is rotated until the first locking block abuts against the first limiting block, thereby fixing the first locking member to the tray body.

[0017] As an alternative solution for the high-voltage pulse separation device for retired lithium-ion battery positive electrode plates, the two trays have the same body size.

[0018] As an alternative solution for a high-voltage pulse separation device for retired lithium-ion battery positive electrode sheets, the cutting base is provided with a first positioning block, which abuts against the side of the tray body; or, the cutting base is provided with a first positioning groove, which is configured to place the tray assembly.

[0019] As an optional solution for a high-voltage pulse separation device for retired lithium-ion battery positive electrode sheets, the high-voltage pulse base is provided with a second positioning block, a second fixing plate and a pad. The second positioning block abuts against the side of the tray body. When the tray body and the electrode sheet 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 sheet to be pulsed, and the second fixing plate is disposed on the pad.

[0020] As an optional solution for a high-voltage pulse separation device for retired lithium-ion battery positive electrode sheets, the high-voltage pulse base is provided with a second positioning groove and a second fixing plate. The second positioning groove is used to place the tray assembly. When the tray body and the electrode sheet to be pulsed are placed in the second positioning groove, the upper surface of the electrode sheet to be pulsed is flush with the upper surface of the high-voltage pulse base. The second fixing plate is disposed on the upper surface of the high-voltage pulse base.

[0021] As an alternative solution for a high-voltage pulse separation device for retired lithium-ion battery positive electrode sheets, the shape of the cutter cross-section is consistent with the gap shape between the two tray bodies, and the electrode sheet to be pulsed is cut into shape in one step. Attached Figure Description

[0022] The present application will now be described with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the high-voltage pulse separation device for retired lithium-ion battery cathode plates described in an embodiment of this application.

[0024] Figure 2 This is a schematic diagram of the tray assembly described in an embodiment of this application.

[0025] Figure 3 This is a schematic diagram showing the separation of the two tray bodies as described in an embodiment of this application.

[0026] Figure 4 This is a schematic diagram of the tray body described in an embodiment of this application.

[0027] Figure 5 This is a schematic diagram of the electrode sheet to be cut according to an embodiment of this application.

[0028] Figure 6 This is a schematic diagram of the cutter described in an embodiment of this application.

[0029] Figure 7 This is a schematic front cross-sectional view of the pulse-to-emitter component described in an embodiment of this application.

[0030] Figure 8 This is a side cross-sectional view of the pulse-to-emitter assembly described in an embodiment of this application.

[0031] Figure 9 This is a schematic diagram of the first lock groove in an embodiment of this application.

[0032] Figure 10 This is a schematic diagram of the cutting base according to an embodiment of this application.

[0033] Figure 11 This is a schematic diagram of the cutting base according to another embodiment of this application.

[0034] Figure 12 This is a schematic diagram of the tray body, the pulse-electrode, and the second fixing plate as described in the embodiments of this application.

[0035] Figure 13 This is a front sectional view of the pulse assembly and high-voltage pulse mechanism according to an embodiment of this application.

[0036] Figure 14 This is a side cross-sectional schematic diagram of a high-voltage pulse mechanism according to an embodiment of this application.

[0037] Figure 15 This is a top view schematic diagram of a high-voltage pulse base according to an embodiment of this application.

[0038] Figure 16 This is a front sectional view of the pulse-to-pulse assembly and high-voltage pulse mechanism according to another embodiment of this application.

[0039] In the picture:

[0040] 100. Electrode to be cut; 200. Electrode to be pulsed; 2001. Protrusion; 2002. Connecting part;

[0041] 1. Pallet assembly; 11. Pallet body; 111. Protrusion; 112. Recess; 113. First locking groove; 114. First limiting block; 115. Splicing side; 12. First fixing plate; 121. First clearance groove; 122. First electrode connecting post; 13. First locking element; 131. First locking pin; 132. First locking block; 133. First cap;

[0042] 2. Cutting mechanism; 21. Cutting base; 211. First positioning block; 212. First positioning groove; 22. Cutting blade;

[0043] 3. High-voltage pulse mechanism; 31. High-voltage pulse base; 311. Second positioning block; 312. Pad block; 313. Second positioning groove; 314. Second locking groove; 32. Second fixing plate; 321. Second electrode connecting post; 33. Second locking element; 34. Pulse electrode;

[0044] 4. Robotic arm. Detailed Implementation

[0045] The technical solutions of the embodiments of this application will now be described with reference to the accompanying drawings.

[0046] In the description of this application, unless otherwise expressly specified and limited, the terms “connected,” “linked,” and “fixed” shall be interpreted broadly. For example, they may refer to a fixed connection, a detachable connection, or an integral part; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; they may refer to the internal connection of two elements or the interaction between two elements.

[0047] like Figures 1 to 7 , Figures 12 to 16As shown, this application provides a high-voltage pulse separation device for retired lithium-ion battery positive electrode sheets, 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 ​​together to form the tray assembly 1. The upper surface of the tray assembly 1 is a supporting plane, which is configured to support the electrode sheet 100 to be cut. A first fixing plate 12 is also provided on the upper surface of the tray body 11, and the side of the electrode sheet 100 to be cut is clamped between the first fixing plate 12 and the tray body 11. The cutting mechanism 2 includes a cutting base 21 and a cutting base 22. The cutting blade 22 and the cutting base 21 have a cutting working area, which is set as a tray assembly 1. The cutting blade 22 is set above the cutting working area and can move 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 electrode 200 to be pulsed. 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 working area, which is set as a tray body 11. 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 placing the electrode sheet 100 to be cut on the tray assembly 1 formed by splicing the two tray bodies 11, the cutter 22 can be inserted into the gap between the two tray bodies 11 to cut and separate the electrode sheet 100 along the shape of the two tray bodies 11. Then, the electrode sheet 200 to be pulsed and the tray body 11 are moved together by the robot arm 4 to the pulse operation area for pulse operation. During the cutting operation and pulse operation, the tray body 11 is the carrier of the same electrode sheet from beginning to end, avoiding moving the electrode sheet alone. This can reduce the probability of the electrode sheet being folded, thereby reducing the steps of flattening the electrode sheet and improving processing efficiency.

[0048] In this embodiment, the positive electrode of the recycled retired lithium-ion battery includes aluminum foil, with active material layers on both sides of the aluminum foil. The active material layers contain elements such as cobalt. A high-voltage pulse can separate the aluminum foil from the active material layers, thereby achieving the separation and recycling of lithium materials from cobalt and other materials.

[0049] The tray body 11 has a splicing side 115, on which a plurality of protrusions 111 are provided. Adjacent protrusions 111 form recesses 112 at intervals. The protrusions 111 are inserted into the recesses 112 of another splicing side 115, so that the two tray bodies 11 fit together to form a tray assembly 1. The electrode sheet 100 to be cut is placed on the supporting plane of the tray assembly 1, which supports the electrode sheet 100. A first fixing plate 12 is provided on the upper surface of the tray body 11. The side of the electrode sheet 100 to be cut is clamped between the first fixing plate 12 and the tray body 11, thus preventing the electrode sheet 100 from being cut... The sheared electrode 100 is displaced; the cut edge shape of the shaped electrode to be pulsed 200 is consistent with the edge shape of the tray body 11. The electrode to be pulsed 200 includes a connecting part 2002 and a plurality of protrusions 2001. The connecting part 2002 is clamped between the first fixing plate 12 and the tray body 11. The protrusions 2001 are located above the protrusions 111. The plurality of protrusions 2001 are connected to each other through the connecting part 2002. The connecting part 2002 of the electrode to be pulsed 200 is electrically connected to one of the pulse electrodes 34. All the protrusions 2001 of the electrode to be pulsed 200 are electrically connected to another pulse electrode 34. The protrusions 111 and recesses 112 are provided on the two tray bodies 11, and the protrusions 111 and recesses 112 are interlocked and spliced ​​with each other, so that the cut edge of the formed electrode sheet 200 to be pulsed can form a protrusion and recess structure with the same shape as the edge of the tray body 11. The protrusions 2001 on the electrode sheet to be pulsed are the same shape as the protrusions 111 on the tray body 11. The protrusions 2001 on the electrode sheet to be pulsed are equivalent to small pieces in the related technology. The connecting part 2002 connects multiple protrusions 2001. After the electrode sheet to be pulsed is connected to the pulse electrode 34, the multiple protrusions 2001 on the electrode sheet to be pulsed are equivalent to being connected in parallel, which is equivalent to simultaneously connecting multiple small pieces in parallel in the related technology and simultaneously performing high voltage pulse processing on multiple small pieces. This can improve the processing efficiency of retired lithium-ion battery positive electrode sheets.

[0050] Optionally, the two tray bodies 11 are the same size. By setting the two tray bodies 11 to be the same size, after the cutting operation of the cutter 22 is completed, each tray body 11 clamps the pulse-to-be-pulsed electrode 200. Each tray body 11, the pulse-to-be-pulsed electrode 200, and the first fixing plate 12 combine to form a pulse-to-be-pulsed assembly. Separating the two tray bodies 11 results in two pulse-to-be-pulsed assemblies with identical shapes, and the corresponding pulse-to-be-pulsed electrode 200 also has identical shapes. This facilitates the positioning of the pulse-to-be-pulsed assembly with 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 30mm, the length of the protrusion 111 is 80mm, and the width of the protrusion 2001 of the corresponding cut pulse-to-be-pulsed electrode 200 is 30mm, and the length of the protrusion 2001 is 80mm.

[0051] Reference Figure 2 and Figure 4 The first fixing plate 12 has a first side surface near the center of the tray body 11. Multiple first clearance grooves 121 are recessed on the first side surface, penetrating the upper and lower surfaces of the first fixing plate 12. Since the first fixing plate 12 and the tray body 11 jointly clamp the connecting portion 2002 of the electrode to be pulsed 200, the surface of the electrode to be pulsed 200 in this area is compressed. Under high-voltage pulse conditions, the active material in the clamped and compressed area of ​​the connecting portion 2002 of the electrode to be pulsed is not easily detached from the aluminum foil. The multiple first clearance grooves 121 reduce the contact area between the first fixing plate 12 and the electrode to be pulsed 200, thereby allowing more active material on the active material layer to separate from the aluminum foil, which is beneficial for improving the effect of high-voltage pulse separation of the aluminum foil and the active material.

[0052] The first fixing plate 12 is a metal plate, and a first electrode connecting post 122 is provided on the first fixing plate 12. The first electrode connecting post 122 is connected to the pulse electrode 34. Multiple first clearance grooves 121 are provided, and each first clearance groove 121 is directly opposite the position of the recess 112. Since the connecting part 2002 of the electrode to be pulsed is clamped between the first fixing plate 12 and the tray body 11, the first fixing plate 12 and the connecting part 2002 of the electrode to be pulsed are in contact. The first electrode connecting post 122 is provided on the first fixing plate 12 to connect the pulse electrode 34 to the electrode to be pulsed through the first fixing plate 12, which can reduce the difficulty of electrical connection between the pulse electrode 34 and the electrode to be pulsed 200 and facilitate operation. The setting of the first clearance groove 121 will reduce the contact area between the first fixing plate 12 and the electrode to be pulsed 200, increase the resistance in this area, and most of the current will flow to the electrode to be pulsed 200. The protrusion 2001 of the 00 is provided with each first clearance groove 121 being directly opposite the recess 112. That is, the first clearance groove 121 is spaced apart from the protrusion 2001 of the electrode to be pulsed 200. This can reduce the influence of the first clearance groove 121 on the resistance value of the area through which the current mainly flows, thereby avoiding excessive heat generation in the contact area between the first fixing plate 12 and the electrode to be pulsed 200, and preventing the aluminum foil of the electrode to be pulsed 200 from overheating and melting (if the aluminum foil melts, it will be difficult to effectively separate from the active material). This reduces the influence of the first clearance groove 121 on the high-voltage pulse operation and ensures the separation effect of the high-voltage pulse operation on the aluminum foil and the active material.

[0053] Reference Figure 8In this embodiment, one end of the first fixing plate 12 is hinged to the tray body 11 via a pivot, 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 is then unlocked, allowing the first fixing plate 12 to rotate. The electrode sheet 100 to be cut is then placed on the integral assembly. The first fixing plate 12 is then rotated to press the edge of the electrode sheet 100 to be cut. The first locking member 13 is then locked, and after the first fixing plate 12 is fixed to the tray body 11, the electrode sheet 100 to be cut is cut using a cutter 22.

[0054] Reference Figure 8 and Figure 9 Optionally, the first locking member 13 includes a first locking pin 131, which is rotatably mounted on the first fixed plate 12. A first locking block 132 is provided at the end of the first locking pin 131 away from the first fixed plate 12. A first locking groove 113 is provided on the tray body 11. A first limiting block 114 is provided at the opening of the first locking groove 113. The opening size of the first locking groove 113 is smaller than the bottom size 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. In this embodiment, a first through hole is provided on the first fixing plate 12, and a first locking pin 131 passes through the first through hole. A first cap 133 is also provided at 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.

[0055] Reference Figure 10 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 of the tray body 11; see reference Figure 11 In another embodiment, a first positioning groove 212 is provided on the cutting base 21 for placing the tray assembly 1. Since the cutter 22 is located above the cutting base 21, the cutter 22 moves downward and inserts into the gap between the two tray bodies 11 to cut the electrode sheet 100. 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 deviation between the electrode sheet 100 to be cut and the cutter 22, and ensure the cutting effect of the electrode sheet 100 to be cut.

[0056] Optionally, the cross-sectional shape of the cutter 22 of the cutting mechanism 2 is consistent with the gap shape between the two tray bodies 11. By setting the cross-sectional shape of the cutter 22 to be consistent with the gap shape between the two tray bodies 11, the electrode sheet 100 to be cut can be separated into two electrode sheets 200 to be pulsed in one cut, resulting in high 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 sheet 200 to be pulsed with the protrusion 2001. In this embodiment, the cutter 22 is bent into shape.

[0057] Reference Figure 13 and Figure 14 A second fixing plate 32 is provided on the high-voltage pulse base 31. The side of the electrode to be pulsed 200 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, and 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 setting the second fixing plate 32, the electrode to be pulsed 200 can be temporarily fixed to the high-voltage pulse base 31 during pulse operation, which facilitates the high-voltage pulse operation. Since the connecting part 2002 of the electrode to be pulsed 200 is clamped between the second fixing plate 32 and the tray body 11, the second fixing plate 32 and the connecting part 2002 of the electrode to be pulsed 200 are tightly pressed together. The second electrode connecting post 321 is provided on the second fixing plate 32 to connect the pulse electrode 34 to the electrode to be pulsed 200 through the second fixing plate 32, which can reduce the difficulty of electrical connection between the pulse electrode 34 and the electrode to be pulsed 200 and facilitate operation.

[0058] Optionally, the connection between the second fixing plate 32 and the high-voltage pulse base 31 is similar to the connection 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 via a rotating shaft, and the other end of the second fixing plate 32 is detachably connected to the high-voltage pulse base 31 via a second locking member 33. During operation, the second locking member 33 can be unlocked first, allowing the second fixing plate 32 to rotate. Then, the tray body 11 and the electrode to be pulsed 200 are placed on the high-voltage pulse base 31. The second fixing plate 32 is then rotated to press the edge of the electrode to be cut 100. The second locking member 33 is then locked, so that the second fixing plate 32 and the electrode to be pulsed 200 are pressed and fixed. After this, the pulse electrode 34 is connected, and the electrode to be pulsed 200 is subjected to high-voltage pulse processing.

[0059] 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 fixed plate 32. Second locking blocks are provided at the two ends of the second locking pin away from the second fixed plate 32. A second locking groove 314 is provided on the high-voltage pulse base 31, and a second limiting block is provided at the opening of the second locking groove 314. The opening size of the second locking groove 314 is smaller than the bottom size of the groove. The second locking block is inserted into the second locking groove 314. The second locking pin is rotated until the second locking block abuts against the second limiting block, thus fixing the second locking member 33 to the high-voltage pulse base 31. In this embodiment, a second through hole is provided on the second fixed plate 32, through which the second locking pin passes. A second cap is also provided 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, and the second cap can prevent the second locking pin from separating from the second fixed plate 32.

[0060] Reference Figures 12 to 15 In one embodiment, the high-voltage pulse base 31 is provided with a second positioning block 311, a second fixing plate 32, and a pad 312. The second positioning block 311 abuts against the side of the tray body 11. When the tray body 11 and the electrode 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 to be pulsed 200, and the second fixing plate 32 is disposed on the pad 312. The tray body 11 carries the electrode to be pulsed 200, and there is a gap between the electrode to be pulsed 200 and the high-voltage pulse base 31. The pad 312 can raise the height of the second fixing plate 32, making it easier for the second fixing plate 32 to press and fix the electrode to be pulsed 200. In this embodiment, the second locking pin is disposed on the pad 312. (Refer to...) Figure 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 to be pulsed 200 are placed in the second positioning groove 313, the upper surface of the electrode to be pulsed 200 is flush with the upper surface of the high-voltage pulse base 31. The second fixing plate 32 is disposed on the upper surface of the high-voltage pulse base 31. By providing the second positioning groove 313, the height of the electrode to be pulsed 200 can be reduced, which facilitates the second fixing plate 32 to press and fix the electrode to be pulsed 200.

[0061] In the description herein, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings, and are used only for ease of description and simplification of operation. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0062] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0063] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way.

Claims

1. A high-voltage pulse separation device for retired lithium-ion battery positive electrode sheets, comprising: The pallet assembly (1) includes at least two pallet bodies (11), which are spliced ​​together to form the pallet assembly (1). The upper surface of the pallet assembly (1) is a support plane, which is set to support the electrode sheet (100) to be cut. The upper surface of the pallet body (11) is also provided with a first fixing plate (12), and the side of the electrode sheet (100) to be cut is clamped between the first fixing plate (12) and the pallet body (11). The cutting mechanism (2) includes a cutting base (21) and a cutter (22). The cutting base (21) has a cutting working area, which is set to place the tray assembly (1). The cutter (22) is located above the cutting working area and can move to insert into the gap between the two tray bodies (11) so that the electrode to be cut (100) is cut and separated into two electrode to be pulsed (200). The electrode to be pulsed (200) is clamped between the first fixing plate (12) and the tray body (11). 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 electrode to be pulsed (200). The two pulse electrodes (34) are respectively connected to the two ends of the electrode to be pulsed (200). During the cutting operation and the high-voltage pulse operation, the tray body (11) serves as the carrier of the same electrode sheet.

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 (115), and the splicing side (115) is provided 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 another splicing side (115), and the two tray bodies (11) are fitted together. The pulse electrode (200) includes a connecting part (2002) and a plurality of protrusions (2001). The connecting part (2002) is clamped between the first fixing plate (12) and the tray body (11). The plurality of protrusions (2001) are connected to each other through the connecting part (2002). The connecting part (2002) is electrically connected to one of the pulse electrodes (34), and all 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 near the center of the tray body (11), and the first side surface is recessed with a plurality of first clearance grooves (121), which penetrate the upper and lower surfaces 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. The first fixing plate (12) is provided with a first electrode connecting post (122). The first electrode connecting post (122) is connected to the pulse electrode (34). The first clearance groove (121) is provided in multiple ways. Each first clearance groove (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 provided on the high-voltage pulse base (31). The end of the protrusion (2001) away from the connecting part (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 post (321) is provided on the second fixing plate (32). The second electrode connecting post (321) is connected to the pulse electrode (34).

6. The high-voltage pulse separation device for retired lithium-ion battery positive electrode plates according to claim 2, wherein, One end of the first fixing plate (12) is hinged to the pallet body (11), and the other end of the first fixing plate (12) is detachably connected to the pallet body (11) through the first locking member (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) includes a first locking pin (131), which is rotatably mounted on the first fixed plate (12). A first locking block (132) is provided at one end of the first locking pin (131) away from the first fixed plate (12). A first locking groove (113) is provided on the tray body (11). A first limiting block (114) is provided at the opening of the first locking groove (113). The opening size of the first locking groove (113) is smaller than the bottom size 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). 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 plates according to any one of claims 1-7, wherein, The two tray bodies (11) are the same size.

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

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

11. The high-voltage pulse separation device for retired lithium-ion battery positive electrode plates according to any one of claims 1-7, 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 electrode (200) are placed in the second positioning groove (313), the upper surface of the pulse-to-be-pulsed electrode (200) is flush with the upper surface of the high-voltage pulse base (31). The second fixing plate (32) is disposed 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 plates according to any one of claims 1-7, wherein, The shape of the cross-section of the cutter (22) is consistent with the gap shape between the two tray bodies (11), and the pulse electrode (200) is cut into shape in one step.

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