Pole piece stripping equipment and pole piece stripping method

Abstract

The invention relates to pole piece stripping equipment and a pole piece stripping method. The pole piece stripping equipment comprises a first rack, a first conveying belt, a supporting roller, a second rack, a second conveying belt and a pressure applying roller. The first rack and the second rack are oppositely arranged in a spaced mode. The multiple supporting rollers are arranged on the first rack at intervals and face the second rack. The first conveying belt covers the surfaces of the multiple supporting rollers, and the surface, facing the second rack, of the first conveying belt forms a bearing face used for bearing materials. The multiple pressure applying rollers are arranged on the second rack at intervals and face the first rack. The second conveying belt covers the surfaces of the multiple pressure applying rollers, the surface, facing the first rack, of the second conveying belt forms a pressure applying face, and the pressure applying face is used for applying pressure to materials located on the bearing face. And the relative position between the supporting roller and the pressure applying roller is adjustable. In the conveying direction of the first conveying belt, the multiple supporting rollers and the multiple pressure applying rollers are alternately arranged at intervals.

Description

Technical Field

[0001] The present application relates to the technical field of battery material recycling, and in particular to a pole piece stripping device and a pole piece stripping method. Background Art

[0002] Recycling the positive electrode active materials of waste lithium-ion batteries can achieve the recycling of active materials. In the regeneration process of positive electrode sheets, it is usually necessary to peel the positive electrode material and aluminum foil, and then screen the positive electrode material. However, the traditional sheet peeling method has a poor effect on the peeling between the active material and the current collector. Summary of the invention

[0003] Based on this, it is necessary to provide a pole piece stripping device and a pole piece stripping method. The pole piece stripping device of the present application can achieve a good stripping effect between the active material and the current collector.

[0004] In a first aspect, the present application provides a pole piece peeling device, comprising a first frame, a first conveyor belt, a support roller, a second frame, a second conveyor belt and a pressure roller;

[0005] The first frame and the second frame are arranged relatively spaced apart;

[0006] There are a plurality of support rollers, which are arranged on the first frame at intervals and facing the second frame; the first conveyor belt covers the surfaces of the plurality of support rollers, and the surface of the first conveyor belt facing the second frame forms a bearing surface for bearing materials;

[0007] There are a plurality of pressure rollers, which are arranged on the second frame at intervals and facing the first frame; the second conveyor belt covers the surfaces of the plurality of pressure rollers, and the surface of the second conveyor belt facing the first frame forms a pressure surface, which is used to pressurize the material on the carrying surface;

[0008] The relative position between the supporting roller and the pressure roller is adjustable;

[0009] In the conveying direction along the first conveyor belt, the plurality of support rollers and the plurality of pressure rollers are alternately arranged at intervals.

[0010] In some embodiments, the pole piece peeling device further includes a first active roller, the first conveyor belt is wound around at least a portion of the surface of the first active roller, and the first active roller is used to control the movement of the first conveyor belt.

[0011] In some embodiments, the pole piece peeling device further comprises a second active roller, the second conveyor belt is wound around at least a portion of the surface of the second active roller, and the second active roller is used to control the movement of the second conveyor belt.

[0012] In some embodiments, the pole piece stripping device also includes a first driven roller and a first support member; the first driven roller and the first conveyor belt are arranged in contact; the first support member is connected to the first driven roller and the first frame, and the first support member is used to adjust the distance between the first frame and the second frame.

[0013] In some embodiments, the pole piece stripping device also includes a second driven roller and a second support member; the second driven roller and the second conveyor belt are arranged in contact; the second support member is connected to the second driven roller and the second frame, and the second support member is used to adjust the distance between the second frame and the first frame.

[0014] In some of the embodiments, the electrode stripping equipment further includes a suction device; the suction device is disposed at the discharge end of the second conveyor belt; and the suction port of the suction device is disposed toward the bearing surface.

[0015] In some of the embodiments, the suction port of the suction device is provided with a screen.

[0016] In some embodiments, the electrode stripping equipment further includes a detection device; the detection device is disposed at the discharge end of the air suction device, and the detection device is used to detect the stripping rate of the active material.

[0017] In a second aspect, the present application provides a pole piece stripping method, using any of the pole piece stripping devices described above to process the pole piece, comprising the following steps:

[0018] Adjusting the relative position between the supporting roller and the pressure roller, controlling the contact surface between the pressure roller and the second conveyor belt to be lower than the contact surface between the supporting roller and the first conveyor belt, so that the bearing surface forms an undulating area;

[0019] The electrode piece to be processed is carried on the carrying surface and transported along the conveying direction of the first conveyor belt, so that the electrode piece passes through the undulating area, and the active material of the electrode piece is peeled off.

[0020] In some embodiments, the electrode stripping device further includes an air suction device; the air suction device is arranged at the discharge end of the second conveyor belt; the air suction port of the air suction device is arranged toward the bearing surface;

[0021] After the active material of the pole piece is peeled off, the following steps are also included:

[0022] The pole piece is conveyed to the suction device, and the stripped active material is sucked by the suction device.

[0023] In some embodiments, the electrode stripping device further comprises a detection device; the detection device is disposed at the discharge end of the air suction device, and the detection device is used to detect the stripping rate of the active material;

[0024] After the stripped active material is sucked by the suction device, the following steps are also included:

[0025] The electrode piece is conveyed to the detection device, and the peeling rate of the active material on the electrode piece is detected by the detection device;

[0026] The stripping process parameters are adjusted according to the stripping rate.

[0027] The above-mentioned electrode sheet stripping equipment can be used to strip the active materials on the electrode sheet. When the electrode sheet to be processed is carried and conveyed by the bearing surface of the first conveyor belt, the relative position between the support roller and the pressure roller is first adjusted until the bearing surface of the first conveyor belt and the pressure surface of the second conveyor belt are in contact, and then the relative position between the support roller and the pressure roller is further adjusted so that the pressure roller applies pressure to the bearing surface, and a plurality of support rollers and a plurality of pressure rollers are alternately arranged along the conveying direction of the first conveyor belt to form an undulating area with high and low undulations on the bearing surface. When the electrode sheet to be stripped passes through the undulating area formed by the support roller and the pressure roller, the electrode sheet will be bent in opposite directions for multiple times, which is conducive to the separation of the active material attached to the current collector on the electrode sheet and the current collector, thereby achieving a better stripping effect on the active material. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG1 is a schematic structural diagram of a pole piece stripping device provided in one embodiment of the present application;

[0029] FIG2 is a schematic structural diagram of the electrode stripping device shown in FIG1 in a working state;

[0030] FIG3 is a schematic diagram of a process flow of a pole piece peeling method provided in one embodiment of the present application;

[0031] FIG4 is a schematic flow chart of a pole piece stripping method provided in yet another embodiment of the present application.

[0032] Description of Reference Numerals

[0033] 11. First frame; 12. First conveyor belt; 13. Load-bearing surface; 14. First active roller; 15. Support roller; 16. First driven roller; 17. First support member; 21. Second frame; 22. Second conveyor belt; 23. Pressure surface; 24. Second active roller; 25. Pressure roller; 26. Second driven roller; 27. Second support member; 30. Suction device; 40. Detection device. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0036] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] For example, refer to FIG. 1, which is a schematic diagram of the structure of a pole piece stripping device provided in one embodiment of the present application. The pole piece stripping device of the present application can be used to strip the active material attached to the current collector. For example, it can be used for the recycling of lithium-ion battery materials. Specifically, it can be used for the stripping between the lithium iron phosphate material and the positive current collector in the positive pole piece.

[0040] As shown in FIG1 , an embodiment of the present application provides a pole piece peeling device, comprising a first frame 11, a first conveyor belt 12, a support roller 15, a second frame 21, a second conveyor belt 22 and a pressure roller 25. The first frame 11 and the second frame 21 are arranged at intervals relative to each other. There are multiple support rollers 15, and multiple support rollers 15 are arranged at intervals on the first frame 11 and facing the second frame 21. The first conveyor belt 12 covers the surfaces of the multiple support rollers 15, and the surface of the first conveyor belt 12 facing the second frame 21 forms a bearing surface 13 for carrying materials. There are multiple pressure rollers 25, and multiple pressure rollers 25 are arranged at intervals on the second frame 21 and facing the first frame 11. The second conveyor belt 22 covers the surfaces of the multiple pressure rollers 25, and the surface of the second conveyor belt 22 facing the first frame 11 forms a pressure surface 23, and the pressure surface 23 is used to press the material located on the bearing surface 13. The relative position between the support roller 15 and the pressure roller 25 is adjustable. In the conveying direction along the first conveyor belt 12, a plurality of support rollers 15 and a plurality of pressure rollers 25 are alternately arranged at intervals.

[0041] The above-mentioned electrode sheet stripping equipment can be used to strip the active materials on the electrode sheet. As shown in FIG. 2 , when the electrode sheet to be processed is carried and conveyed by the bearing surface 13 of the first conveyor belt 12, the relative position between the support roller 15 and the pressure roller 25 is first adjusted until the bearing surface 13 of the first conveyor belt 12 and the pressure surface 23 of the second conveyor belt 22 are in contact, and then the relative position between the support roller 15 and the pressure roller 25 is further adjusted so that the pressure roller 25 applies pressure to the bearing surface 13. The bearing surface 13 can be formed into an undulating area with high and low undulations by means of a plurality of support rollers 15 and a plurality of pressure rollers 25 alternately arranged along the conveying direction of the first conveyor belt 12. When the electrode sheet to be stripped passes through the undulating area formed by the support roller 15 and the pressure roller 25, the electrode sheet will be bent in opposite directions for multiple times, which is conducive to the separation of the active material attached to the current collector on the electrode sheet and the current collector, thereby achieving a better stripping effect on the active material.

[0042] It is understood that the battery pole piece usually includes a current collector and an active layer arranged on the surface of the current collector, and the material of the active layer includes an active material. Stripping the active material refers to separating the active material from the current collector, thereby facilitating the recycling and reuse of the active material powder. It is understood that the current collector is usually a metal foil with a certain flexibility, and the active layer is usually obtained by drying and pressing after slurry coating, and its bending resistance is poor. By squeezing the first conveyor belt 12 and the second conveyor belt 22 against each other through the support roller 15 and the pressure roller 25, an undulating area with crests and troughs can be achieved. For example, the area where each support roller 15 is located forms a crest, and the area where each pressure roller 25 is located forms a trough. When the pole piece to be processed passes through the crests and troughs in sequence, it will be bent in opposite directions multiple times under the action of pressure, thereby causing damage to the active layer to achieve a better stripping effect on the active material.

[0043] It can be understood that the multiple support rollers 15 and the multiple pressure rollers 25 are alternately arranged along the conveying direction of the first conveyor belt 12, which means that a pressure roller 25 is arranged between two adjacent support rollers 15, and a support roller 15 is also arranged between two adjacent pressure rollers 25.

[0044] In some embodiments, the plurality of support rollers 15 are sequentially arranged along the conveying direction of the first conveyor belt 12 .

[0045] In some embodiments, the plurality of pressure rollers 25 are sequentially arranged along the conveying direction of the second conveyor belt 22 .

[0046] In some embodiments, the plurality of support rollers 15 are arranged at equal intervals.

[0047] In some embodiments, the plurality of pressure rollers 25 are arranged at equal intervals.

[0048] In some embodiments, the pole piece peeling device further includes a first active roller 14 , and the first conveyor belt 12 is wound around at least a portion of the surface of the first active roller 14 . The first active roller 14 is used to control the movement of the first conveyor belt 12 .

[0049] In some embodiments, the pole piece peeling device further includes a second active roller 24 , and the second conveyor belt 22 is wound around at least a portion of the surface of the second active roller 24 . The second active roller 24 is used to control the movement of the second conveyor belt 22 .

[0050] In some embodiments, the pole piece peeling device further includes a first driven roller 16 and a first support member 17. The first driven roller 16 is arranged in contact with the first conveyor belt 12. The first support member 17 is connected to the first driven roller 16 and the first frame 11, and the first support member 17 is used to adjust the distance between the first frame 11 and the second frame 21.

[0051] Exemplarily, two ends of the first support member 17 are respectively connected to the first driven roller 16 and the first frame 11 , and the first support member 17 itself is retractable to adjust the distance between the first frame 11 and the second frame 21 .

[0052] Referring again to FIG. 1 and FIG. 2, by adjusting the distance between the first frame 11 and the second frame 21 through the first support member 17, the support roller 15 can be moved toward the second frame 21 to form an undulating area as shown in FIG. 2, which is convenient for stripping the electrode sheet. At the same time, after the stripping operation is completed, the first frame 11 can be reset to separate the first conveyor belt 12 and the second conveyor belt 22, thereby reducing the friction loss between the first conveyor belt 12 and the second conveyor belt 22.

[0053] In some embodiments, the pole piece peeling device further includes a second driven roller 26 and a second support member 27. The second driven roller 26 is arranged in contact with the second conveyor belt 22. The second support member 27 is connected to the second driven roller 26 and the second frame 21, and the second support member 27 is used to adjust the distance between the second frame 21 and the first frame 11.

[0054] Exemplarily, two ends of the second support member 27 are respectively connected to the second driven roller 26 and the second frame 21 , and the second support member 27 itself is retractable to adjust the distance between the second frame 21 and the first frame 11 .

[0055] By adjusting the distance between the second frame 21 and the first frame 11 through the second support member 27, the pressure roller 25 can be moved toward the first frame 11 to form an undulating area as shown in FIG. 2, which is convenient for stripping the electrode sheet. At the same time, after the stripping operation is completed, the second frame 21 can be reset to separate the second conveyor belt 22 from the first conveyor belt 12, thereby reducing the friction loss between the second conveyor belt 22 and the first conveyor belt 12.

[0056] In some embodiments, the electrode stripping device further includes a suction device 30. The suction device 30 is disposed at the discharge end of the second conveyor belt 22. The suction port of the suction device 30 is disposed toward the bearing surface 13.

[0057] The suction device 30 can absorb the active material in the pole piece after passing through the undulating area, thereby further improving the stripping effect of the active material.

[0058] In some of the embodiments, the suction port of the suction device 30 is provided with a screen.

[0059] The suction port of the suction device 30 is provided with a screen, which can allow the active material powder to be sucked through the screen when sucking the electrode, while the current collector is isolated by the screen, further improving the suction effect of the suction device 30 on the active material.

[0060] In some embodiments, the electrode stripping device further includes a detection device 40. The detection device 40 is disposed at the discharge end of the air suction device 30, and the detection device 40 is used to detect the stripping rate of the active material.

[0061] By detecting the stripping rate of the active material through the detection device 40, the stripping effect of the electrode stripping equipment can be verified. Furthermore, for different electrode sheets, the stripping process parameters can be adjusted to improve the stripping effect of the active materials of different electrode sheets. Exemplarily, the stripping process parameters may include the height difference of the bearing surface 13, the pressure between the pressure surface 23 and the bearing surface 13, the movement rate of the first conveyor belt 12, the suction force of the suction device 30 or the number of suctions of the suction device 30, etc. The electrode stripping equipment is convenient for adjusting its stripping process parameters for different electrode sheets, and can obtain better active material stripping effects for different electrode sheets.

[0062] Exemplarily, the detection device 40 may be an image detection device 40 .

[0063] The image detection device 40 can compare the area ratios of the region covered by the active material and the region not covered by the active material on the current collector to calculate the stripping rate of the active material.

[0064] As shown in FIG. 3 , another embodiment of the present application provides a pole piece stripping method, using any of the pole piece stripping devices described above to process the pole piece, comprising the following steps:

[0065] S1: Adjust the relative position between the supporting roller 15 and the pressure roller 25, control the contact surface between the pressure roller 25 and the second conveyor belt 22 to be lower than the contact surface between the supporting roller 15 and the first conveyor belt 12, so that the bearing surface 13 forms an undulating area;

[0066] S2: The electrode to be processed is carried on the carrying surface 13 and transported along the conveying direction of the first conveyor belt 12, so that the electrode passes through the undulating area, and the active material of the electrode is peeled off.

[0067] In some embodiments, the electrode sheet stripping device further includes a suction device 30; the suction device 30 is disposed at the discharge end of the second conveyor belt 22; the suction port of the suction device 30 is disposed toward the bearing surface 13; after stripping the active material of the electrode sheet, the following steps are further included:

[0068] The pole piece is transferred to the suction device 30 , and the stripped active material is sucked by the suction device 30 .

[0069] In some embodiments, the electrode stripping device further includes a detection device 40; the detection device 40 is disposed at the discharge end of the suction device 30, and the detection device 40 is used to detect the stripping rate of the active material; after the stripped active material is sucked by the suction device 30, the following steps are also included:

[0070] The electrode piece is conveyed to the detection device 40, and the stripping rate of the active material on the electrode piece is detected by the detection device 40;

[0071] The stripping process parameters are adjusted according to the stripping rate.

[0072] By detecting the stripping rate of the active material through the detection device 40, the stripping effect of the electrode stripping equipment can be verified. Furthermore, the stripping process parameters can be adjusted for different electrode sheets to improve the stripping effect of the active materials of different electrode sheets. Exemplarily, the stripping process parameters may include the height difference of the undulation of the bearing surface 13, the pressure between the pressure surface 23 and the bearing surface 13, the movement rate of the first conveyor belt 12, the suction force of the suction device 30 or the number of suctions of the suction device 30, etc. The above-mentioned electrode stripping method is convenient for adjusting the stripping process parameters for different electrode sheets, and can obtain better active material stripping effects for different electrode sheets.

[0073] In some embodiments, before the electrode to be processed is carried on the carrying surface 13 and transported along the conveying direction of the first conveyor belt 12, the following steps are also included:

[0074] The electrode to be processed is subjected to high-temperature calcination treatment to remove the binder in the electrode.

[0075] As shown in FIG. 4 , in some embodiments, the pole piece stripping method includes the following steps:

[0076] S1: Adjust the relative position between the supporting roller 15 and the pressure roller 25, control the contact surface between the pressure roller 25 and the second conveyor belt 22 to be lower than the contact surface between the supporting roller 15 and the first conveyor belt 12, so that the bearing surface forms an undulating area;

[0077] S2: The electrode to be processed is carried on the carrying surface 13 and transported along the conveying direction of the first conveyor belt 12, so that the electrode passes through the undulating area, and the active material of the electrode is peeled off.

[0078] S3: The electrode piece is transferred to the suction device 30, and the stripped active material is sucked by the suction device 30;

[0079] S4: The electrode piece is transferred to the detection device 40, and the stripping rate of the active material on the electrode piece is detected by the detection device 40;

[0080] S5: adjusting the stripping process parameters according to the stripping rate.

[0081] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims, and the description and drawings may be used to interpret the contents of the claims.

Claims

1. A pole piece stripping device, characterized in that: It includes a first frame, a first conveyor belt, a support roller, a second frame, a second conveyor belt and a pressure roller; The first frame and the second frame are arranged relatively spaced apart; There are a plurality of support rollers, which are arranged on the first frame at intervals and facing the second frame; the first conveyor belt covers the surfaces of the plurality of support rollers, and the surface of the first conveyor belt facing the second frame forms a bearing surface for bearing materials; There are a plurality of pressure rollers, which are arranged on the second frame at intervals and facing the first frame; the second conveyor belt covers the surfaces of the plurality of pressure rollers, and the surface of the second conveyor belt facing the first frame forms a pressure surface, which is used to pressurize the material on the carrying surface; The relative position between the supporting roller and the pressure roller is adjustable; In the conveying direction along the first conveyor belt, the plurality of support rollers and the plurality of pressure rollers are alternately arranged at intervals.

2. The pole piece stripping device according to claim 1, characterized in that: The pole piece peeling device further comprises a first active roller, the first conveyor belt is wound around at least a part of the surface of the first active roller, and the first active roller is used to control the movement of the first conveyor belt; and / or, The pole piece stripping device further comprises a second active roller, the second conveyor belt is wound around at least a portion of the surface of the second active roller, and the second active roller is used to control the movement of the second conveyor belt.

3. The pole piece stripping device according to claim 1, characterized in that: The pole piece stripping device also includes a first driven roller and a first support member; the first driven roller and the first conveyor belt are arranged in contact; the first support member is connected to the first driven roller and the first frame, and the first support member is used to adjust the distance between the first frame and the second frame.

4. The pole piece stripping device according to claim 1, characterized in that: The pole piece stripping device also includes a second driven roller and a second support member; the second driven roller and the second conveyor belt are arranged in contact; the second support member is connected to the second driven roller and the second frame, and the second support member is used to adjust the distance between the second frame and the first frame.

5. The electrode stripping device according to any one of claims 1 to 4, characterized in that: The electrode stripping equipment also includes an air suction device; the air suction device is arranged at the discharge end of the second conveyor belt; and the air suction port of the air suction device is arranged toward the bearing surface.

6. The pole piece stripping device according to claim 5, characterized in that: The air suction port of the air suction device is provided with a screen.

7. The pole piece stripping device according to claim 5, characterized in that: The electrode stripping equipment further comprises a detection device; the detection device is arranged at the discharge end of the air suction device, and the detection device is used to detect the stripping rate of the active material.

8. A pole piece stripping method, characterized in that: The electrode stripping device according to any one of claims 1 to 7 is used to process the electrode, comprising the following steps: Adjusting the relative position between the supporting roller and the pressure roller, controlling the contact surface between the pressure roller and the second conveyor belt to be lower than the contact surface between the supporting roller and the first conveyor belt, so that the bearing surface forms an undulating area; The electrode piece to be processed is carried on the carrying surface and transported along the conveying direction of the first conveyor belt, so that the electrode piece passes through the undulating area, and the active material of the electrode piece is peeled off.

9. The pole piece stripping method according to claim 8, characterized in that: The electrode stripping device further comprises an air suction device; the air suction device is arranged at the discharge end of the second conveyor belt; the air suction port of the air suction device is arranged toward the bearing surface; After the active material of the pole piece is peeled off, the following steps are also included: The pole piece is conveyed to the suction device, and the stripped active material is sucked by the suction device.

10. The pole piece stripping method according to claim 9, characterized in that: The electrode stripping device further comprises a detection device; the detection device is arranged at the discharge end of the air suction device, and the detection device is used to detect the stripping rate of the active material; After the stripped active material is sucked by the suction device, the following steps are also included: The electrode piece is conveyed to the detection device, and the peeling rate of the active material on the electrode piece is detected by the detection device; The stripping process parameters are adjusted according to the stripping rate.

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