Pole piece stripping equipment

Abstract

The utility model relates to pole piece stripping equipment. 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] This application relates to the field of battery material recycling technology, and in particular to an electrode stripping device. Background Technology

[0002] Recycling the positive electrode active material from spent lithium-ion batteries enables the reuse of this material. The regeneration process of the positive electrode typically requires separating the positive electrode material from the aluminum foil, followed by screening the positive electrode material. However, traditional electrode stripping methods are ineffective at separating the active material from the current collector. Utility Model Content

[0003] Therefore, it is necessary to provide an electrode stripping device that can achieve a better stripping effect between the active material and the current collector.

[0004] This application provides an electrode stripping device, including a first frame, a first conveyor belt, a support roller, a second frame, a second conveyor belt, and a pressure roller;

[0005] The first rack and the second rack are arranged at a relative interval;

[0006] There are multiple support rollers, which are spaced apart on the first frame and facing the second frame; the first conveyor belt covers the surface of the multiple support rollers, and the surface of the first conveyor belt facing the second frame forms a bearing surface for carrying materials;

[0007] The pressure rollers are multiple, and the multiple pressure rollers are spaced apart on the second frame and facing the first frame; the second conveyor belt covers the surface of the multiple pressure rollers, and the surface of the second conveyor belt facing the first frame forms a pressure surface, which is used to apply pressure to the material located on the bearing surface;

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

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

[0010] In some embodiments, the electrode stripping device further includes a first drive roller, with the first conveyor belt wound around at least a portion of the surface of the first drive roller, the first drive roller being used to control the movement of the first conveyor belt.

[0011] In some embodiments, the electrode stripping device further includes a second drive roller, the second conveyor belt being wound around at least a portion of the surface of the second drive roller, the second drive roller being used to control the movement of the second conveyor belt.

[0012] In some embodiments, the plurality of support rollers are arranged sequentially along the conveying direction of the first conveyor belt.

[0013] In some embodiments, the plurality of pressure rollers are arranged sequentially along the conveying direction of the second conveyor belt.

[0014] In some embodiments, the electrode stripping device further includes a first driven roller and a first support member; the first driven roller and the first conveyor belt are 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.

[0015] In some embodiments, the electrode stripping device further includes a second driven roller and a second support member; the second driven roller and the second conveyor belt are 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.

[0016] In some embodiments, the electrode stripping device further includes a suction device; the suction device is disposed at the discharge end of the second conveyor belt; the suction port of the suction device is disposed facing the bearing surface.

[0017] In some embodiments, the air intake of the suction device is provided with a screen.

[0018] In some embodiments, the electrode stripping device further includes a detection device; the detection device is disposed at the discharge end of the suction device, and the detection device is used to detect the stripping rate of the active material.

[0019] The aforementioned electrode stripping equipment can be used to strip active materials from electrode sheets. When the electrode sheet to be processed is carried and conveyed through the bearing surface of the first conveyor belt, the relative positions between the support roller and the pressure roller are first adjusted until the bearing surface of the first conveyor belt and the pressure surface of the second conveyor belt are in contact. Then, the relative positions between the support roller and the pressure roller are further adjusted so that the pressure roller applies pressure to the bearing surface. Multiple support rollers and multiple pressure rollers, alternately spaced along the conveying direction of the first conveyor belt, create an undulating area on the bearing surface. As the electrode sheet to be stripped passes through the undulating area formed by the support roller and the pressure roller, the electrode sheet undergoes multiple bends in opposite directions, which facilitates the separation of the active material adhering to the current collector from the current collector, thereby achieving a better stripping effect on the active material. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an electrode stripping device provided in one embodiment of this application;

[0021] Figure 2 for Figure 1 The diagram shown is a structural schematic of the electrode stripping device in operation.

[0022] Figure 3 A schematic flowchart of an electrode stripping method provided in one embodiment of this application;

[0023] Figure 4 This is a schematic flowchart of an electrode stripping method provided in another embodiment of this application.

[0024] Explanation of reference numerals in the attached figures

[0025] 11. First frame; 12. First conveyor belt; 13. Bearing surface; 14. First drive roller; 15. Support roller; 16. First driven roller; 17. First support member; 21. Second frame; 22. Second conveyor belt; 23. Pressure surface; 24. Second drive roller; 25. Pressure roller; 26. Second driven roller; 27. Second support member; 30. Suction device; 40. Detection device. Detailed Implementation

[0026] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, a detailed description of specific embodiments of this application is provided below. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and 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.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] For example, see Figure 1 As shown, Figure 1 This is a schematic diagram of an electrode stripping device provided in one embodiment of this application. The electrode stripping device of this application can be used to strip active materials attached to a current collector. For example, it can be used for the recycling of lithium-ion battery materials. Specifically, it can be used to strip lithium iron phosphate material and the positive electrode current collector from the positive electrode sheet.

[0032] Reference Figure 1 As shown, one embodiment of this application provides an electrode stripping device, including a first frame 11, a first conveyor belt 12, support rollers 15, a second frame 21, a second conveyor belt 22, and pressure rollers 25. The first frame 11 and the second frame 21 are arranged at intervals relative to each other. Multiple support rollers 15 are spaced apart 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 material. Multiple pressure rollers 25 are spaced apart 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, which is used to apply pressure to the material located on the bearing surface 13. The relative positions between the support rollers 15 and the pressure rollers 25 are adjustable. Along the conveying direction of the first conveyor belt 12, a plurality of support rollers 15 and a plurality of pressure rollers 25 are alternately spaced.

[0033] The aforementioned electrode stripping equipment can be used to strip the active material from the electrode. (Refer to...) Figure 2As shown, when the electrode to be processed is carried and conveyed through the bearing surface 13 of the first conveyor belt 12, the relative positions between the support roller 15 and the pressure roller 25 are first adjusted so that the bearing surface 13 of the first conveyor belt 12 and the pressure surface 23 of the second conveyor belt 22 are in contact. Then, the relative positions between the support roller 15 and the pressure roller 25 are further adjusted so that the pressure roller 25 applies pressure to the bearing surface 13. The multiple support rollers 15 and multiple pressure rollers 25, which are alternately arranged along the conveying direction of the first conveyor belt 12, can form an undulating area on the bearing surface 13. When the electrode to be peeled passes through the undulating area formed by the support rollers 15 and the pressure rollers 25, the electrode will bend in opposite directions multiple times, which is beneficial to the separation of the active material attached to the current collector and the current collector on the electrode, thereby achieving a better peeling effect on the active material.

[0034] It is understood that battery electrodes typically include a current collector and an active layer disposed on the surface of the current collector, the active layer being made of active material. Peeling off the active material refers to removing it from the current collector, thus facilitating the recycling and reuse of the active material powder. It is understood that the current collector is typically a metal foil with a certain degree of flexibility, while the active layer is typically obtained by coating a slurry, drying, and pressing it, resulting in poor bending resistance. By using support rollers 15 and pressure rollers 25 to press the first conveyor belt 12 and the second conveyor belt 22 against each other, undulating regions with crests and troughs can be created. For example, the areas where each support roller 15 is located form crests, and the areas where each pressure roller 25 is located form troughs. As the electrode to be processed passes through the crests and troughs sequentially, it undergoes multiple bends in opposite directions under pressure, leading to damage to the active layer and achieving a better peeling effect on the active material.

[0035] It is understood that the alternating arrangement of multiple support rollers 15 and multiple pressure rollers 25 along the conveying direction of the first conveyor belt 12 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.

[0036] In some embodiments, a plurality of support rollers 15 are arranged sequentially along the conveying direction of the first conveyor belt 12.

[0037] In some embodiments, a plurality of pressure rollers 25 are arranged sequentially along the conveying direction of the second conveyor belt 22.

[0038] In some embodiments, multiple support rollers 15 are arranged at equal intervals.

[0039] In some embodiments, multiple pressure rollers 25 are arranged at equal intervals.

[0040] In some embodiments, the electrode stripping device further includes a first drive roller 14, with a first conveyor belt 12 wound around at least a portion of the surface of the first drive roller 14, the first drive roller 14 being used to control the movement of the first conveyor belt 12.

[0041] In some embodiments, the electrode stripping device further includes a second drive roller 24, with a second conveyor belt 22 wound around at least a portion of the surface of the second drive roller 24, the second drive roller 24 being used to control the movement of the second conveyor belt 22.

[0042] In some embodiments, the electrode stripping apparatus further includes a first driven roller 16 and a first support member 17. The first driven roller 16 is disposed 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.

[0043] For example, the 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 telescopic to adjust the distance between the first frame 11 and the second frame 21.

[0044] Refer again Figure 1 , Figure 2 As shown, 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 a shape as shown. Figure 2 The undulating area shown facilitates the peeling of the electrode sheets. Simultaneously, after the peeling operation is completed, the first frame 11 can be reset, separating the first conveyor belt 12 and the second conveyor belt 22, reducing frictional loss between them.

[0045] In some embodiments, the electrode stripping apparatus further includes a second driven roller 26 and a second support member 27. The second driven roller 26 and the second conveyor belt 22 are in contact. The second support member 27 is connected to the second driven roller 26 and the second frame 21, and is used to adjust the distance between the second frame 21 and the first frame 11.

[0046] For example, the 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 telescopic to adjust the distance between the second frame 21 and the first frame 11.

[0047] By adjusting the distance between the second frame 21 and the first frame 11 using the second support member 27, the pressure roller 25 can be moved toward the first frame 11 to form a shape as shown in the image. Figure 2The undulating area shown facilitates the peeling of the electrode sheets. Simultaneously, after the peeling operation is completed, the second frame 21 can be reset, separating the second conveyor belt 22 from the first conveyor belt 12 and reducing frictional loss between them.

[0048] In some embodiments, the electrode stripping apparatus 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 facing the bearing surface 13.

[0049] The suction device 30 can extract the active material from the electrode after passing through the undulating area, further improving the peeling effect of the active material.

[0050] In some embodiments, the air intake of the air suction device 30 is provided with a screen.

[0051] The suction port of the suction device 30 is equipped with a screen, which allows the active material powder to be drawn through the screen while the current collector is isolated by the screen, thereby further improving the suction effect of the suction device 30 on the active material.

[0052] 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 is used to detect the stripping rate of the active material.

[0053] The peeling rate of the active material is detected by the detection device 40, which verifies the peeling effect of the electrode peeling device. Furthermore, for different electrodes, the peeling process parameters can be adjusted to improve the peeling effect of the active material on different electrodes. For example, the peeling 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 speed of the first conveyor belt 12, the suction force of the suction device 30, or the number of suction cycles of the suction device 30. This electrode peeling device allows for convenient adjustment of its peeling process parameters for different electrodes, enabling good active material peeling effects for various electrodes.

[0054] For example, the detection device 40 can be an image detection device 40.

[0055] The image detection device 40 can compare the area ratio of the current collector covered by the active material and the area not covered by the active material to calculate the peeling rate of the active material.

[0056] Reference Figure 3 As shown, another embodiment of this application provides an electrode stripping method, which uses the electrode stripping equipment of any of the above claims to process the electrode, including the following steps:

[0057] S1: Adjust the relative position between the support roller 15 and the pressure roller 25, and control the contact surface of the pressure roller 25 and the second conveyor belt 22 to be lower than the contact surface of the support roller 15 and the first conveyor belt 12, so that the bearing surface 13 forms an undulating area.

[0058] S2: The electrode to be processed is carried by the bearing 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.

[0059] 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 facing the bearing surface 13; after stripping the active material of the electrode, the device further includes the following steps:

[0060] The electrode sheet is conveyed to the suction device 30, and the suction device 30 absorbs the stripped active material.

[0061] 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 up by the suction device 30, the following steps are also included:

[0062] The electrode sheet is conveyed to the detection device 40, and the peeling rate of the active material on the electrode sheet is detected by the detection device 40.

[0063] Adjust the peeling process parameters based on the peeling rate.

[0064] The peeling rate of the active material is detected by the detection device 40, which verifies the peeling effect of the electrode peeling equipment. Furthermore, the peeling process parameters can be adjusted to improve the peeling effect on different electrodes. For example, the peeling 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 speed of the first conveyor belt 12, the suction force of the suction device 30, or the number of suction cycles of the suction device 30. The above electrode peeling method allows for easy adjustment of the peeling process parameters for different electrodes, enabling good active material peeling results for various electrodes.

[0065] In some embodiments, before the electrode to be processed is carried on the bearing surface 13 and transferred along the conveying direction of the first conveyor belt 12, the following steps are also included:

[0066] The electrode sheets to be treated are subjected to high-temperature calcination to remove the binder from the electrode sheets.

[0067] Reference Figure 4As shown, in some embodiments, the electrode stripping method includes the following steps:

[0068] S1: Adjust the relative position between the support roller 15 and the pressure roller 25, and control the contact surface between the pressure roller 25 and the second conveyor belt 22 to be lower than the contact surface between the support roller 15 and the first conveyor belt 12, so that the bearing surface forms an undulating area.

[0069] S2: The electrode to be processed is carried by the bearing 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.

[0070] S3: The electrode sheet is conveyed to the suction device 30, and the suction device 30 absorbs the stripped active material;

[0071] S4: The electrode sheet is transferred to the detection device 40, and the peeling rate of the active material on the electrode sheet is detected by the detection device 40.

[0072] S5: Adjust the peeling process parameters according to the peeling rate.

[0073] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0074] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims, and the specification and drawings can be used to interpret the content of the claims.

Claims

1. An electrode 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 rack and the second rack are arranged at a relative interval; There are multiple support rollers, which are spaced apart on the first frame and facing the second frame; the first conveyor belt covers the surface of the multiple support rollers, and the surface of the first conveyor belt facing the second frame forms a bearing surface for carrying materials; The pressure rollers are multiple, and the multiple pressure rollers are spaced apart on the second frame and facing the first frame; the second conveyor belt covers the surface of the multiple pressure rollers, and the surface of the second conveyor belt facing the first frame forms a pressure surface, which is used to apply pressure to the material located on the bearing surface; The relative position between the support roller and the pressure roller is adjustable; Along the conveying direction of the first conveyor belt, a plurality of support rollers and a plurality of pressure rollers are arranged alternately at intervals.

2. The electrode stripping device according to claim 1, characterized in that, The electrode stripping device further includes a first drive roller, and the first conveyor belt is wound around at least a portion of the surface of the first drive roller. The first drive roller is used to control the movement of the first conveyor belt.

3. The electrode stripping device according to claim 1, characterized in that, The electrode stripping device further includes a second drive roller, and the second conveyor belt is wound around at least a portion of the surface of the second drive roller. The second drive roller is used to control the movement of the second conveyor belt.

4. The electrode stripping device according to claim 1, characterized in that, The plurality of support rollers are arranged sequentially along the conveying direction of the first conveyor belt.

5. The electrode stripping device according to claim 1, characterized in that, The plurality of pressure rollers are arranged sequentially along the conveying direction of the second conveyor belt.

6. The electrode stripping device according to claim 1, characterized in that, The electrode stripping device further includes a first driven roller and a first support member; the first driven roller and the first conveyor belt are 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.

7. The electrode stripping device according to claim 1, characterized in that, The electrode stripping device further includes a second driven roller and a second support member; the second driven roller and the second conveyor belt are 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.

8. The electrode stripping apparatus according to any one of claims 1 to 7, characterized in that, The electrode stripping device also includes a suction device; the suction device is located at the discharge end of the second conveyor belt; the suction port of the suction device is oriented towards the bearing surface.

9. The electrode stripping device according to claim 8, characterized in that, The suction port of the suction device is equipped with a screen.

10. The electrode stripping device according to claim 8, characterized in that, The electrode stripping equipment also includes a detection device; the detection device is located at the discharge end of the suction device and is used to detect the stripping rate of the active material.

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