Wound lithium ion battery positive electrode sheet recycling processing device

Abstract

A wound lithium ion battery positive electrode sheet recycling processing device, comprising an unwinding assembly, a winding assembly, and a pulse assembly. The unwinding assembly is used for controlling the unwinding length of a positive electrode sheet to be processed; the winding assembly is used for collecting a processed positive electrode sheet; in the conveying direction of the positive electrode sheet, a high-voltage pulse region is arranged between the unwinding assembly and the winding assembly; the pulse assembly is arranged in the high-voltage pulse region; the pulse assembly comprises a first electrode plate and a second electrode plate; the first electrode plate and the second electrode plate are spaced from each other in the width direction of the positive electrode sheet; and both the first electrode plate and the second electrode plate can move in the thickness direction perpendicular to the positive electrode sheet, so that the first electrode plate and the second electrode plate selectively abut against the edge of the positive electrode sheet.

Description

Winding type lithium-ion battery positive electrode sheet recycling and processing device Technical Field

[0001] The present application relates to the technical field of recycling retired lithium-ion batteries, for example, to a winding type lithium-ion battery positive electrode sheet recycling and processing device. 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 recycled lithium-ion battery cathodes. Compared to hydrometallurgical processes, this method can reduce the use of chemical solvents. Currently, high-voltage pulse discharge requires cutting the complete cathode 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. Only one small piece can be processed at a time, and the replacement process is time-consuming and inefficient.

[0004] Summary of the Invention

[0005] An embodiment of the present application provides a wound-type lithium-ion battery positive electrode sheet recycling and processing device, which can continuously perform high-voltage pulse processing on the positive electrode sheets of the wound-type lithium-ion battery with high processing efficiency.

[0006] The present application provides a wound-type lithium-ion battery positive electrode sheet recycling and processing device, comprising an unwinding assembly, a rewinding assembly and a pulse assembly, wherein the unwinding assembly is used to control the unwinding length of the positive electrode sheet to be processed, and the rewinding assembly is used to collect the processed positive electrode sheet, and a high-voltage pulse zone is provided between the unwinding assembly and the rewinding assembly along the conveying direction of the positive electrode sheet, and the pulse assembly is provided in the high-voltage pulse zone, and the pulse assembly comprises a first electrode plate and a second electrode plate, the first electrode plate and the second electrode plate are arranged at intervals along the width direction of the positive electrode sheet, and the first electrode plate and the second electrode plate are both capable of moving in a direction perpendicular to the thickness direction of the positive electrode sheet so that the first electrode plate and the second electrode plate selectively press against the edge of the positive electrode sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0008] FIG1 is a schematic front view of a wound-type lithium-ion battery positive electrode sheet recycling and processing device according to an embodiment of the present application.

[0009] FIG2 is a schematic top view of the wound-type lithium-ion battery positive electrode sheet recycling and processing device according to an embodiment of the present application.

[0010] FIG3 is a schematic diagram of the positive electrode sheet described in an embodiment of the present application.

[0011] FIG4 is a schematic diagram of the punching assembly according to an embodiment of the present application.

[0012] FIG5 is a schematic diagram of the punch described in an embodiment of the present application.

[0013] FIG6 is a schematic diagram of a twisted positive electrode sheet according to an embodiment of the present application.

[0014] In the picture:

[0015] 100. Liquid medium;

[0016] 1. Unwinding assembly; 2. First guide roller; 3. Second guide roller; 4. Pulse assembly; 41. First electrode plate; 411. First clamping plate; 42. Second electrode plate; 421. Second clamping plate; 43. First electric push rod; 5. Spray assembly; 51. Spray head; 52. Spray pipe; 53. Pump body; 54. Reversing valve; 6. Reaction tank; 61. Liquid outlet; 7. Punching assembly; 71. Punching table; 72. Punch; 721. Mounting plate; 722. First blade group; 7221. First blade body; 723. Second blade group; 7231. Second blade body; 81. Electrode roll; 82. Positive electrode; 821. Processing unit; 822. First through hole; 823. Second through hole. DETAILED DESCRIPTION

[0017] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the embodiments of this application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.

[0018] In the description of this application, unless otherwise expressly provided, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0019] As shown in Figures 1 and 2, the present application provides a winding type lithium-ion battery positive electrode sheet recycling and processing device (hereinafter referred to as the recycling and processing device), which can quickly process the positive electrode sheet 82 of the wound lithium-ion battery. The positive electrode sheet 82 of the wound lithium-ion battery is relatively long. After the positive electrode sheet 82 and the negative electrode sheet of the retired lithium-ion coil are separated, the positive electrode sheet 82 is wound to obtain a to-be-processed electrode sheet roll 81. The recycling and processing device includes an unwinding component 1, a winding component and a pulse component 4. The to-be-processed electrode sheet roll 81 is placed in the unwinding component 1. The unwinding component 1 is used to control the unwinding length of the to-be-processed positive electrode sheet 82. The winding component The component is used to collect the processed positive electrode sheet 82. Along the conveying direction of the positive electrode sheet 82, a high-voltage pulse zone is arranged between the unwinding component 1 and the winding component. The pulse component 4 is arranged in the high-voltage pulse zone. The pulse component 4 includes a first electrode plate 41 and a second electrode plate 42. The first electrode plate 41 and the second electrode plate 42 are respectively connected to the positive pole and the negative pole of the power supply. The first electrode plate 41 and the second electrode plate 42 are arranged at intervals along the width direction of the positive electrode sheet 82. The first electrode plate 41 and the second electrode plate 42 can both move in a thickness direction perpendicular to the positive electrode sheet 82 so that the first electrode plate 41 and the second electrode plate 42 selectively press against the edge of the positive electrode sheet 82.

[0020] By setting up an unwinding component 1 and a rewinding component, the unwinding component 1 and the rewinding component can cooperate to transport the positive electrode sheet 82, so that each area of ​​the positive electrode sheet 82 enters the high-voltage pulse area in turn to perform high-voltage pulse operation. In this embodiment, the positive electrode sheet 82 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 layer contains elements such as cobalt. The high-voltage pulse can separate the aluminum foil from the active material layer to achieve the separation and recovery of lithium materials from other materials such as cobalt; by setting up a first electrode plate 41 and a second electrode plate 42 to be movable in a thickness direction perpendicular to the positive electrode sheet 82, the first electrode plate 41 and the second electrode plate 42 can press against the edge of the positive electrode sheet 82. When the first electrode plate 41 and the second electrode plate 42 are both pressed against the edge of the positive electrode sheet 82, the first electrode plate 41 and the second electrode plate 42 are powered on, and the high-voltage pulse current can flow into the positive electrode sheet 82, so that the active material layer on the positive electrode sheet 82 can be separated from the positive electrode sheet 82. Aluminum foil separation is used to separate and recover lithium materials from other materials such as cobalt. It can be understood that when the voltage remains unchanged, the smaller the resistance in the circuit, the greater the current. In this embodiment, the first electrode plate 41 and the second electrode plate 42 are arranged at intervals along the width direction of the positive electrode sheet 82. In the direction of the straight line connecting the first electrode plate 41 and the second electrode plate 42, that is, the width direction of the positive electrode sheet 82, the resistance in the circuit is the smallest. Therefore, most of the current flows along the width direction of the positive electrode sheet 82 to the electrode plate on the opposite side, and less energy is lost. After the high-voltage pulse operation is completed, the first electrode plate 41 and the second electrode plate 42 can be driven away from the positive electrode sheet 82, and then the positive electrode sheet 82 is driven to move by the unwinding component 1 and the winding component, so that the area on the positive electrode sheet 82 that has undergone high-voltage pulse leaves the high-voltage pulse area, and the area on the positive electrode sheet 82 that has not undergone high-voltage pulse enters the high-voltage pulse area, thereby performing the next high-voltage pulse operation, which can improve the processing efficiency.

[0021] Optionally, a plurality of first opening areas are provided on the positive electrode sheet 82, and the plurality of first opening areas are spaced apart along the length direction of the positive electrode sheet 82, and at least one first through hole 822 is provided in each first opening area, and all the first through holes 822 in each first opening area are spaced apart along the width direction of the positive electrode sheet 82. In this embodiment, along the length direction of the positive electrode sheet 82, the positive electrode sheet 82 is divided into a plurality of processing units 821, and each processing unit 821 is spaced apart by a first opening area, that is, a processing unit 821 is provided between two adjacent first opening areas; during pulse operation, the first electrode plate 41 and the second electrode plate 42 are located between two adjacent first opening areas, and the first electrode plate 41 and the second electrode plate 42 perform high-voltage pulse operation on one processing unit 821. By setting a first opening area and providing a first through hole 822 in the first opening area, the cross-sectional area of ​​the positive electrode sheet 82 in the first opening area can be reduced, thereby increasing the resistance of the positive electrode sheet 82 in the first opening area. This can reduce the probability of current flowing through the first opening area into the adjacent processing unit 821, thereby reducing energy loss, and can ensure the processing effect of the positive electrode sheet 82 in the high-voltage pulse area during each high-voltage pulse operation, so that the active material layer on the positive electrode sheet 82 can be separated from the aluminum foil, thereby realizing the separation and recovery of lithium materials and other materials such as cobalt.

[0022] Optionally, multiple second opening areas are provided on the positive electrode sheet 82, and the multiple second opening areas are spaced apart along the length direction of the positive electrode sheet 82, and at least one second opening area is provided between two adjacent first opening areas. That is to say, at least one second opening area is provided in each processing unit 821. Referring to Figure 3, three second opening areas are provided in the processing unit 821, and each second opening area includes at least two second through holes 823. All the second through holes 823 in each second opening area are arranged at intervals along the width direction of the positive electrode sheet 82, and the cross-sectional area of ​​the positive electrode sheet 82 in the first opening area is smaller than the cross-sectional area of ​​the positive electrode sheet 82 in the second opening area. By setting a second opening area, the cross-sectional area of ​​the positive electrode sheet 82 in the second opening area can be reduced, thereby increasing the resistance of the positive electrode sheet 82 in the second opening area, thereby reducing the probability of the current in the processing unit 821 flowing along the length direction of the positive electrode sheet 82; in this embodiment, the size of the area formed between two adjacent second opening areas (or the first opening area and the second opening area) is similar to the size of the small piece recorded in the background technology. This embodiment is equivalent to connecting multiple small pieces in the background technology in parallel for unified processing.

[0023] Referring to Figure 3, in this embodiment, two first through holes 822 are provided in the first opening area, three second opening areas are provided in the processing unit 821, four second through holes 823 are provided in each second opening area, and the length and width of the first through hole 822 are both greater than the length and width of the second through hole 823.

[0024] It should be noted that the first through hole 822 and the second through hole 823 are both spaced apart from the edge of the positive electrode sheet 82. It is understandable that the provision of the first through hole 822 and the second through hole 823 will weaken the strength of the positive electrode sheet 82. The provision of the first through hole 822 and the second through hole 823 and the spaced apart from the edge of the positive electrode sheet 82 can avoid the formation of notches at the edge of the positive electrode sheet 82 and prevent the positive electrode sheet 82 from being torn during transportation.

[0025] 4 , the recycling and processing device further includes a punching assembly 7 , which is arranged between the unwinding assembly 1 and the high-voltage pulse zone along the conveying direction of the positive electrode sheet 82 . The punching assembly 7 includes a punching table 71 and a punch 72 . The punching table 71 is used to carry the positive electrode sheet 82 . The punch 72 is arranged above the punching table 71 . The punch 72 can move in a vertical direction. The punch 72 is used to form a first through hole 822 and a second through hole 823 on the positive electrode sheet 82 . By setting up the punching assembly 7, the positive electrode sheet 82 can be punched directly during the process of conveying the positive electrode sheet 82, that is, the positive electrode sheet 82 can be punched to form the first through hole 822 and the second through hole 823 directly during the process of conveying the positive electrode sheet 82. During the high-voltage pulse operation, the positive electrode sheet 82 is stationary. It can be understood that during this time period, the positive electrode sheet 82 located on the punching table 71 is also stationary. In this way, the time period when the conveyance of the positive electrode sheet 82 is stopped during the pulse operation can be used to punch the positive electrode sheet 82, which can improve the processing efficiency.

[0026] 5 , the punch 72 includes a vertically movable mounting plate 721 . The mounting plate 721 is provided with a first blade assembly 722 and N second blade assemblies 723 . The N second blade assemblies 723 are spaced apart along the conveying direction of the positive electrode sheet 82 . The first blade assembly 722 is used to form first through-holes 822 within the first opening area, and the second blade assembly 723 is used to form second through-holes 823 within the second opening area. On the positive electrode sheet 82 , M second opening areas are provided between two adjacent first opening areas, where N = M. In this embodiment, N = M = 3. During the high-voltage pulse operation, the positive electrode sheet 82 is stationary. After the pulse operation is completed, the positive electrode sheet 82 needs to move the length of a processing unit 821. It can be understood that during the punching operation, the positive electrode sheet 82 also needs to be stationary. A first blade group 722 and multiple second blade groups 723 are provided on the mounting plate 721, and the number of the second blade groups 723 is consistent with the number of the second opening areas in each processing unit 821. Then, during the time when the high-voltage pulse operation is stationary, the positive electrode sheet 82 located in the punching assembly 7 can be punched. The punch 72 can form all the hole structures in the processing unit 821 by punching once, so that the stationary time of the high-voltage pulse operation can be overlapped with the stationary time of the punching operation, thereby improving the processing efficiency.

[0027] The first blade group 722 includes a plurality of first blade bodies 7221, and the number of the first blade bodies 7221 is consistent with the number of the first through holes 822 in each first opening area. In the present embodiment, two first through holes 822 are provided in each first opening area, and two first blade bodies 7221 are correspondingly provided in the first blade group 722. Correspondingly, the second blade group 723 includes a plurality of second blade bodies 7231, and the number of the second blade bodies 7231 is consistent with the number of the second through holes 823 in each second opening area. In the present embodiment, four second through holes 823 are provided in each second opening area, and four second blade bodies 7231 are correspondingly provided in the second blade group 723.

[0028] Optionally, the first electrode plate 41 and the second electrode plate 42 are arranged at intervals along the vertical direction, that is, in the high-voltage pulse area, the width direction of the positive electrode sheet 82 is parallel to the vertical direction. In this embodiment, the first electrode plate 41 and the second electrode plate 42 need to continue to perform high-voltage pulse operation. It can be understood that after the high-voltage pulse is completed, the active material on the positive electrode sheet 82 will be separated from the aluminum foil. The active material after being separated from the aluminum foil is in powder form. The powdered active material is easy to adhere to the first electrode plate 41 and the second electrode plate 42, resulting in a reduction in the effective contact area between the first electrode plate 41 and the second electrode plate 42 and the positive electrode sheet 82. The first electrode plate 41 and the second electrode plate 42 are arranged at intervals along the vertical direction. Then, the contact surface between the first electrode plate 41 and the second electrode plate 42 and the positive electrode sheet 82 is a vertical surface. Under the action of gravity, the powdered active material will fall downward, reducing the amount of active material attached to the first electrode plate 41 and the second electrode plate 42, ensuring effective contact between the first electrode plate 41 and the second electrode plate 42 and the positive electrode plate 82, and avoiding the need to manually clean the first electrode plate 41 and the second electrode plate 42 multiple times, so that the high-voltage pulse operation can be carried out continuously and automatically, thereby improving processing efficiency; by setting the high-voltage pulse area, the width direction of the positive electrode plate 82 is parallel to the vertical direction, under the action of gravity, the powdered active material will also fall downward, so that the separated active material can be collected in the high-voltage pulse area.

[0029] In this embodiment, the high-voltage pulse operation is carried out in a liquid environment, a reaction tank 6 is provided in the high-voltage pulse area, the pulse assembly 4 is provided in the reaction tank 6, and a liquid medium 100 is also provided in the reaction tank 6. The winding lithium-ion battery positive electrode sheet 82 recovery and processing device also includes a first guide roller 2 and a second guide roller 3. The first guide roller 2 is provided outside the reaction tank 6 and is horizontally provided, and the second guide roller 3 is provided inside the reaction tank 6 and is vertically provided. The width direction of the positive electrode sheet 82 in the unwinding assembly 1 is parallel to the horizontal direction, and the positive electrode sheet 82 unwound by the unwinding assembly 1 is sequentially wound around the first guide roller 2 and the second guide roller 3 into the pulse assembly 4. By providing the first guide roller 2 and the second guide roller 3, the direction of the positive electrode sheet 82 can be guided. For example, the width direction of the positive electrode sheet 82 outside the high-voltage pulse area is parallel to the horizontal direction, which can facilitate the transportation and storage of the electrode sheet roll 81. After being guided by the first guide roller 2 and the second guide roller 3, the positive electrode sheet 82 will be twisted as shown in Figure 6, so that the width direction of the positive electrode sheet 82 in the high-voltage pulse area is parallel to the vertical direction. Of course, the first guide roller 2 and the second guide roller 3 can also play the role of tensioning the positive electrode sheet 82 to prevent the positive electrode sheet 82 from bending during transportation.

[0030] Of course, along the conveying direction of the positive electrode sheet 82, a tensioning roller can be additionally provided between the unwinding assembly 1 and the winding assembly.

[0031] Referring to Figure 2, the first electrode plate 41 includes two first clamps 411, which can move along the thickness direction of the positive electrode sheet 82. The first clamps 411 are connected to the inner wall of the reaction tank 6 through the first electric push rod 43. The first electric push rod 43 drives the first clamps 411 to move so that the two first clamps 411 are closer to or farther away from each other; the second electrode plate 42 includes two second clamps 421, which can move along the thickness direction of the positive electrode sheet 82. The second clamps 421 are connected to the inner wall of the reaction tank 6 through the second electric push rod. The second electric push rod drives the second clamps 421 to move so that the two second clamps 421 are closer to or farther away from each other. By setting the first clamping plate 411 and the second clamping plate 421, the first clamping plate 411 and the second clamping plate 421 can respectively clamp the positive electrode sheet 82, thereby ensuring effective contact between the positive electrode sheet 82 and the first electrode plate 41 and the second electrode plate 42; by setting the first electric push rod 43 and the second electric push rod, the first electric push rod 43 and the second electric push rod can respectively drive the first clamping plate 411 and the second clamping plate 421 to move linearly.

[0032] 1 , a reaction tank 6 is provided in the high-voltage pulse zone, a liquid medium 100 is provided in the reaction tank 6, a pulse assembly 4 is provided in the reaction tank 6, and the pulse assembly 4 is immersed in the liquid medium 100. The wound lithium-ion battery positive electrode sheet 82 recycling and processing device also includes a spray assembly 5. Along the conveying direction of the positive electrode sheet 82, the spray assembly 5 is provided between the high-voltage pulse zone and the winding assembly. The spray assembly 5 includes a nozzle 51, and the spray direction of the nozzle 51 is facing the liquid outlet position of the positive electrode sheet 82. It is understandable that in the process of transporting the positive electrode sheet 82, the liquid medium 100 will form a water flow impact with the positive electrode sheet 82, thereby causing the active material on the positive electrode sheet 82 to separate. However, after the positive electrode sheet 82 is twisted, there may still be active material powder remaining on the upward side of the positive electrode sheet 82. A nozzle 51 is provided, and the spray direction of the nozzle 51 is facing the liquid outlet position of the positive electrode sheet 82. The upward side of the positive electrode sheet 82 can be sprayed and flushed, so that the active material powder can be separated from the positive electrode sheet 82 after the high-voltage pulse.

[0033] In one embodiment, the spray assembly 5 includes a spray pipe 52 and a pump body 53, one end of the spray pipe 52 is connected to the reaction tank 6, and the other end of the spray pipe 52 is provided with a nozzle 51, and the pump body 53 is provided on the spray pipe 52, that is, the liquid sprayed by the nozzle 51 comes from the reaction tank 6, and the liquid medium 100 forms a circulation between the reaction tank 6, the spray pipe 52, the pump body 53 and the nozzle 51; in another embodiment, the nozzle 51 is connected to the external pipeline, and the reaction tank 6 is provided with a liquid outlet 61, that is, the nozzle 51 continuously sprays new liquid medium 100 into the reaction tank 6, and a liquid outlet 61 is also provided at the bottom of the reaction tank 6 to prevent excessive liquid medium 100 in the reaction tank 6 from overflowing, and a valve is also provided at the liquid outlet 61.

[0034] Referring to Figure 1, in this embodiment, the spray assembly 5 includes a spray pipe 52 and a pump body 53. One end of the spray pipe 52 is connected to the reaction tank 6, and the other end of the spray pipe 52 is provided with a nozzle 51. The pump body 53 is arranged on the spray pipe 52, and a reversing valve 54 is provided on the spray pipe 52. The reversing valve 54 is connected to the external pipeline. A liquid outlet 61 is also provided at the bottom of the reaction tank 6, and a valve is also provided at the liquid outlet 61. The reversing valve 54 can control whether the nozzle 51 is connected to the pump body 53 or to the external pipeline. In the initial stage of operation, when the liquid medium 100 in the reaction tank 6 contains less active material powder, the reversing valve 54 can be adjusted to connect the pump body 53 with the nozzle 51. The liquid sprayed from the nozzle 51 comes from the reaction tank 6, and the liquid medium 100 circulates between the reaction tank 6, the spray pipe 52, the pump body 53 and the nozzle 51. When the liquid medium 100 in the reaction tank 6 contains more active material powder, the reversing valve 54 can be adjusted to connect the nozzle 51 with the external pipeline. The nozzle 51 continuously sprays new liquid medium 100 into the reaction tank 6, and the valve of the liquid outlet 61 is opened. This can prevent the active material powder from accumulating in the pump body 53 and the nozzle 51 to form a blockage, and the liquid medium 100 discharged from the liquid outlet 61 can be filtered and separated to collect the active material powder, thereby realizing the recovery of the active material powder.

[0035] In the description herein, it should be understood that 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, be constructed, or operate in a specific orientation. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and do not have any special meaning.

[0036] 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.

[0037] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0038] The technical principles of the present application have been described above in conjunction with specific embodiments. These descriptions are intended only to illustrate the principles of the present application. Based on the explanations herein, those skilled in the art will be able to conceive of other specific implementations of the present application without undue effort, and such implementations will fall within the scope of protection of the present application.

Claims

1. A winding type lithium-ion battery positive electrode sheet recycling and processing device, comprising an unwinding assembly (1), a winding assembly, and a pulse assembly (4). The unwinding assembly (1) is used to control the unwinding length of the positive electrode sheet (82) to be processed. The winding assembly is used to collect the processed positive electrode sheet (82). Along the conveying direction of the positive electrode sheet (82), a high-voltage pulse area is arranged between the unwinding assembly (1) and the winding assembly. The pulse assembly (4) is arranged in the high-voltage pulse area. The pulse assembly (4) includes a first electrode plate (41) and a second electrode plate (42). The first electrode plate (41) and the second electrode plate (42) are arranged at intervals along the width direction of the positive electrode sheet (82). Both the first electrode plate (41) and the second electrode plate (42) can move in a direction perpendicular to the thickness direction of the positive electrode sheet (82) so that the first electrode plate (41) and the second electrode plate (42) selectively press against the edges of the positive electrode sheet (82).

2. The winding type lithium-ion battery cathode sheet recycling and processing device according to claim 1, wherein, A plurality of first perforated areas are arranged on the positive electrode sheet (82). The plurality of first perforated areas are arranged at intervals along the length direction of the positive electrode sheet (82). At least one first through hole (822) is arranged in each first perforated area. All the first through holes (822) in each first perforated area are arranged at intervals along the width direction of the positive electrode sheet (82). During pulse operation, the first electrode plate (41) and the second electrode plate (42) are located between two adjacent first perforated areas.

3. The winding type lithium-ion battery cathode sheet recycling and processing device according to claim 2, wherein, A plurality of second perforated areas are arranged on the positive electrode sheet (82). The plurality of second perforated areas are arranged at intervals along the length direction of the positive electrode sheet (82). At least one second perforated area is arranged between two adjacent first perforated areas. Each second perforated area includes at least two second through holes (823). All the second through holes (823) in each second perforated area are arranged at intervals along the width direction of the positive electrode sheet (82). The cross-sectional area of the positive electrode sheet (82) in the first perforated area is smaller than the cross-sectional area of the positive electrode sheet (82) in the second perforated area.

4. The winding type lithium-ion battery positive electrode sheet recycling and processing device according to claim 3, further comprising a punching assembly (7). Along the conveying direction of the positive electrode sheet (82), the punching assembly (7) is arranged between the unwinding assembly (1) and the high-voltage pulse area. The punching assembly (7) includes a punching table (71) and a punch (72). The punching table (71) is used to carry the positive electrode sheet (82). The punch (72) is arranged above the punching table (71). The punch (72) can move in the vertical direction. The punch (72) is used to form the first through hole (822) and the second through hole (823) on the positive electrode sheet (82).

5. The winding type lithium-ion battery cathode sheet recycling and processing device according to claim 4, wherein, The punch (72) includes a mounting plate (721) that can move in the vertical direction. A first blade group (722) and N second blade groups (723) are arranged on the mounting plate (721). The N second blade groups (723) are arranged at intervals along the conveying direction of the positive electrode plate (82). The first blade group (722) is used to form the first through hole (822) in the first opening area. The second blade group (723) is used to form the second through hole (823) in the second opening area. On the positive electrode plate (82), M second opening areas are arranged between two adjacent first opening areas, and N = M.

6. The winding type lithium-ion battery cathode sheet recycling and processing device according to claim 3, wherein, Both the first through hole (822) and the second through hole (823) are spaced from the edge of the positive electrode plate (82).

7. The winding type lithium-ion battery cathode sheet recycling and processing device according to any one of claims 1-6, wherein, The first electrode plate (41) and the second electrode plate (42) are arranged at intervals in the vertical direction.

8. The winding type lithium-ion battery cathode sheet recycling and processing device according to claim 7, wherein, A reaction tank (6) is arranged in the high-voltage pulse area. The pulse assembly (4) is arranged in the reaction tank (6). A liquid medium (100) is also arranged in the reaction tank (6). The winding type lithium-ion battery positive electrode plate recycling and processing device further includes a first guide roller shaft (2) and a second guide roller shaft (3). The first guide roller shaft (2) is arranged outside the reaction tank (6) and horizontally. The second guide roller shaft (3) is arranged in the reaction tank (6) and vertically. The width direction of the positive electrode plate (82) in the unwinding assembly (1) is parallel to the horizontal direction. The positive electrode plate (82) unwound from the unwinding assembly (1) sequentially winds around the first guide roller shaft (2) and the second guide roller shaft (3) and enters the pulse assembly (4).

9. The winding type lithium-ion battery cathode sheet recycling and processing device according to any one of claims 1-6, wherein, A reaction tank (6) is arranged in the high-voltage pulse area. The pulse assembly (4) is arranged in the reaction tank (6). The first electrode plate (41) includes two first clamping plates (411). At least one of the first clamping plates (411) can move in the thickness direction of the positive electrode plate (82). The movable first clamping plate (411) is connected to the inner wall of the reaction tank (6) through a first electric push rod (43). The first electric push rod (43) drives the movable first clamping plate (411) to move so that the two first clamping plates (411) approach or move away from each other. and / or The second electrode plate (42) includes two second clamping plates (421). At least one of the second clamping plates (421) can move in the thickness direction of the positive electrode plate (82). The movable second clamping plate (421) is connected to the inner wall of the reaction tank (6) through a second electric push rod. The second electric push rod drives the movable second clamping plate (421) to move so that the two second clamping plates (421) approach or move away from each other.

10. The winding type lithium-ion battery cathode sheet recycling and processing device according to any one of claims 1-6, wherein, A reaction tank (6) is arranged in the high-voltage pulse area. A liquid medium (100) is arranged in the reaction tank (6). The pulse assembly (4) is arranged in the reaction tank (6), and the pulse assembly (4) is immersed in the liquid medium (100). The recycling and treatment device for the wound lithium-ion battery positive electrode sheet further includes a spraying assembly (5). Along the conveying direction of the positive electrode sheet (82), the spraying assembly (5) is arranged between the high-voltage pulse area and the winding assembly. The spraying assembly (5) includes a spray head (51), and the liquid spraying direction of the spray head (51) is directly opposite to the liquid outlet position of the positive electrode sheet (82).

11. The winding type lithium-ion battery cathode sheet recycling and processing device according to claim 10, wherein, The spraying assembly (5) includes a spray pipe (52) and a pump body (53). One end of the spray pipe (52) is communicated with the reaction tank (6), the other end of the spray pipe (52) is provided with the spray head (51), and the pump body (53) is arranged on the spray pipe (52); and / or, The spray head (51) is communicated with an external pipeline, and the reaction tank (6) is provided with a liquid outlet (61).

Images