Pole piece slot position processing equipment and pole piece slot position processing method

Abstract

The invention provides pole piece slot position processing equipment and a pole piece slot position processing method. The pole piece slot position processing equipment comprises a scraper, a scraping belt, a scraping belt winding and unwinding mechanism, a bearing mechanism and a driving mechanism, and the scraper comprises a scraping edge; one side surface of the scraping belt is in contact with the scraping edge, the other side surface of the scraping belt is used for being in contact with slurry of the pole piece, and the slurry can be attached to the scraping belt; the scraping belt winding and unwinding mechanism is used for conveying the scraping belt, so that the scraping belt passes through the scraping edge while being in contact with the scraping edge; the bearing mechanism is used for bearing a to-be-processed pole piece, conveying the pole piece and enabling the pole piece to pass through the scraper; the driving mechanism is used for driving the scraper to move so that the scraping edge can ascend and descend relative to the bearing mechanism. The pole piece slot processing equipment is beneficial to reducing the risk that the slurry is accumulated at the edge of the slot when the slurry is scraped away and the slot is formed.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a pole piece slot processing device and a pole piece slot processing method. Background Art

[0002] There are usually some slots on the electrode of the battery cell. For example, the electrode includes a tab welding slot, and the tab can be connected to the part of the current collector exposed in the tab welding slot; for example, slots are provided in certain parts of the electrode to reduce the local thickness of the battery cell.

[0003] In one existing technology, the slots on the electrode are formed by laser cleaning. Specifically, a slurry containing active material is first coated on the surface of the current collector, and then a portion of the slurry is removed by laser cleaning. The portion of the electrode where the slurry has been removed forms the slot. However, as consumers' demands for battery energy density and charge and discharge rates continue to increase, the thickness of the current collector is becoming thinner and the particle size of the active material formula is becoming smaller. Laser cleaning makes it difficult to completely remove the slurry in the slots and may even directly penetrate the foil.

[0004] To overcome the problems associated with laser cleaning, another existing technology uses a scraper to partially remove the slurry (before it fully solidifies). This creates a groove in the electrode where the slurry has been removed. However, as the scraper removes the slurry, it pushes it to one side of the groove, causing slurry to accumulate at the edge of the groove. This results in an uneven thickness of the resulting active material layer, leading to excessive thickness in certain areas of the cell. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a pole piece slot processing device, which is conducive to reducing the risk of slurry accumulation at the slot edge when scraping away the slurry and forming the slot.

[0006] The present invention also provides a method for processing a pole piece slot.

[0007] According to the first aspect of the present invention, the pole piece slot processing equipment of the embodiment includes: a scraper including a scraper edge; a scraper belt, one side surface of the scraper belt is in contact with the scraper edge, and the other side surface of the scraper belt is used to contact the slurry of the pole piece, and the scraper belt can be attached by the slurry; a scraper belt reeling and unwinding mechanism, used to convey the scraper belt so that the scraper belt passes through the scraper edge while contacting the scraper edge; a carrying mechanism, the carrying mechanism is located below the scraper and the scraper belt, the carrying mechanism is used to carry the pole piece to be processed, and is used to convey the pole piece and make the pole piece pass through the scraper; a driving mechanism, connected to the scraper, the driving mechanism is used to drive the scraper to move so that the scraper edge rises and falls relative to the carrying mechanism.

[0008] The pole piece slot processing equipment according to the embodiment of the first aspect of the present invention has at least the following beneficial effects: since the scraping belt is continuously transported during the process of scraping away the slurry, the slurry scraped off and attached to the scraping belt is continuously sent away from the pole piece (sent to the winding roller), which is conducive to reducing the risk of slurry accumulation at the edge of the slot finally formed, thereby reducing the risk of uneven pole piece thickness and excessive local thickness of the battery cell.

[0009] According to some embodiments of the present invention, the scraper is made of one of stainless steel, tungsten steel, and resin; and / or the scraper belt is made of one of PET, PI, PVC, paper, and non-woven fabric.

[0010] According to some embodiments of the present invention, the supporting mechanism includes a supporting surface for supporting the pole piece. When the scraper scrapes the slurry of the pole piece, the angle between the scraper and the supporting surface is A, 30°≤A≤120°.

[0011] According to some embodiments of the present invention, the scraping belt completely covers the scraping edge, the width of the scraping belt is W1, the length of the scraping edge is W2, and 0≤W1-W2≤1mm.

[0012] According to some embodiments of the present invention, the straightness of the scraper edge is less than or equal to 0.05 mm; and / or the thickness of the scraper is not less than 0.2 mm and not more than 2 mm; and / or the thickness of the scraper belt is not less than 5 μm and not more than 200 μm.

[0013] According to some embodiments of the present invention, the scraper is inclined relative to the carrying surface, the scraping edge is located at the bottom end of the scraper, and the bottom end and the top end of the scraper are arranged in sequence along the conveying direction of the electrode.

[0014] According to some embodiments of the present invention, the supporting mechanism includes a supporting surface for supporting the pole piece, the scraper is inclined relative to the supporting surface, and the scraper belt retracting and unwinding mechanism is used to drive the scraper belt to pass through the lower space of the scraper, the scraping material edge and the upper space of the scraper in sequence.

[0015] According to some embodiments of the present invention, the scraper belt includes a first section and a second section that are connected, the first section is located in the lower space, the second section is located in the upper space, and the intersection of the first section and the second section abuts against the edge of the scraper; wherein, when the scraper belt scrapes the slurry of the pole piece: the angle between the first section and the second section is an acute angle; and / or, the angle between the first section and the bearing surface is an acute angle; and / or, the angle between the second section and the vertical plane is an acute angle.

[0016] According to the second aspect of the present invention, the method for processing the electrode slot includes the following steps: conveying the electrode and passing the electrode through a scraper, wherein the electrode includes a current collector and a slurry coated on the current collector; driving the scraper close to the electrode so that the scraping belt pressed by the scraping edge of the scraper contacts the slurry on the current collector; maintaining the conveyance of the electrode and driving the scraping belt to move so that the scraping belt passes through the scraping edge while contacting the scraping edge, thereby allowing the slurry scraped off by the scraping belt to be sent away by the scraping belt; lifting the scraper to separate the scraping belt from the slurry on the current collector.

[0017] The pole piece slot processing method according to the embodiment of the second aspect of the present invention has at least the following beneficial effects: since the scraping belt is continuously transported during the process of scraping away the slurry, the slurry scraped off and attached to the scraping belt is continuously sent away from the pole piece (sent to the winding roller), which is conducive to reducing the risk of slurry accumulation at the edge of the slot finally formed, thereby reducing the risk of uneven pole piece thickness and excessive local thickness of the battery cell.

[0018] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which: Figure 1 A top view of a pole piece and a pole ear in one embodiment of the present invention; Figure 2 Schematic diagram of the process of slurry accumulation at the edge of the slot in the prior art; Figure 3 A schematic diagram of a pole piece slot processing device according to an embodiment of the present invention; Figure 4for Figure 3 Schematic diagram of the working process of the pole piece slot processing equipment shown; Figure 5 Schematic diagram of the cooperation relationship between the scraper and the scraper belt.

[0020] Figure markings: 101-pole piece, 102-slurry, 103-current collector, 104-slot, 105-ear, 106-stacking part, 201-equipment, 202-scraper, 203-scraper belt, 204-driving mechanism, 205-scraper belt winding and unwinding mechanism, 206-winding roller, 207-unwinding roller, 208-second support roller, 209-first support roller, 210-bearing mechanism, 211-bearing surface, 212-first section, 213-second section, 214-upper space, 215-lower space, 216-scraper edge. DETAILED DESCRIPTION

[0021] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0022] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0023] In the description of the present invention, "several" means more than one, "plurality" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0024] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0025] Figure 1The figure shows a pole piece 101, which includes a current collector 103 and a slurry 102 coated on the current collector 103. The slurry 102 contains an active material and, after being baked, serves as the active material layer of the pole piece 101. The slurry 102 is provided with a slot 104, which serves as a tab connection slot. The portion of the current collector 103 exposed in the tab connection slot 105 can be connected to the tab 105 (e.g., by welding or bonding), thereby achieving electrical connection between the tab 105 and the pole piece 101.

[0026] Figure 2 FIG. 1 shows a prior art technique for machining the slot 104. Figure 2 As shown, when the slurry 102 is not solidified, the scraper 202 can be driven to move relative to the pole piece 101, so that the scraper 202 scrapes off a portion of the slurry 102 located on the current collector 103, and the location where the scraped slurry 102 was originally located will form a groove 104. As the scraper 202 moves, the scraped slurry 102 will climb up along the scraper 202; when the scraper 202 is lifted, a portion of the scraped slurry 102 will adhere to the surface of the scraper 202 and leave the pole piece 101 together with the scraper 202, while the other portion of the scraped slurry 102 will accumulate near the edge of the groove 104, thereby forming an accumulation portion 106. Figure 2 As shown, the thickness of the accumulation portion 106 is relatively large. After the slurry 102 solidifies, the thickness of the active material layer at the accumulation portion 106 is relatively large, resulting in uneven thickness of the active material layer, which in turn causes the local thickness of the battery cell to be too large.

[0027] In another prior art (not shown), a scraper is used to scrape the slurry while a suction nozzle is used to suck away the scraped slurry. However, the suction force of the suction nozzle is limited, and sucking away the slurry by the suction nozzle still cannot effectively solve the problem of slurry accumulation at the edge of the slot.

[0028] In order to solve the above problems, the present invention provides a pole piece slot processing device (hereinafter referred to as the device) and a pole piece slot processing method.

[0029] Figure 3 An apparatus 201 according to an embodiment of the present invention is shown. The apparatus 201 includes a scraper 202 , a scraping belt 203 , a scraping belt reeling and unwinding mechanism 205 , a carrying mechanism 210 , and a driving mechanism 204 .

[0030] The scraper 202 may be made of stainless steel, tungsten steel, or resin so that the scraper 202 has sufficient strength and rigidity to stably support the scraping belt 203. The scraper 202 includes a scraping edge 216 located at the bottom of the scraper 202 (e.g., Figure 4 ). The scraping edge 216 can also be considered as the edge of the blade or the blade head of the scraper 202.

[0031] One side of the scraper belt 203 is in contact with the scraper edge 216 (eg Figure 4 As shown, the other side surface of the scraper belt 203 is used to contact the slurry 102 of the electrode 101, and the slurry 102 of the electrode 101 can adhere to the scraper belt 203. Specifically, the scraper belt 203 is made of one of PET, PI, PVC, paper, and non-woven fabric, so that the slurry 102 of the electrode 101 can adhere to the scraper belt 203. In addition, based on the materials listed above, the scraper belt 203 has good flexibility and toughness, and the scraper belt 203 is suitable for cooperation with the scraper 202.

[0032] The scraper belt rewinding and unwinding mechanism 205 is used to convey the scraper belt 203 so that the scraper belt 203 passes the scraper material edge 216 while maintaining contact with the scraper material edge 216. Specifically, the scraper belt rewinding and unwinding mechanism 205 includes a rewinding roller 206 and an unwinding roller 207. One end of the scraper belt 203 is wound around the rewinding roller 206, and the other end of the scraper belt 203 is wound around the unwinding roller 207. The scraper belt rewinding and unwinding mechanism 205 also includes a first motor for driving the rewinding roller 206 to rotate, and a second motor for driving the unwinding roller 207 to rotate. These two motors are not shown in the drawings. Figure 4 As shown, the first motor can drive the take-up roller 206 to rotate counterclockwise, and the second motor can drive the unwinding roller 207 to rotate counterclockwise, thereby transporting the scraper belt 203 from the unwinding roller 207 to the take-up roller 206, with the scraper belt 203 passing the scraping edge 216 of the scraper 202 along the way. As the scraper belt 203 continues to be transported, the diameter of the scraper belt 203 on the unwinding roller 207 gradually decreases, while the diameter of the scraper belt 203 on the rewinding roller 206 gradually increases. The scraper belt unwinding and take-up mechanism 205 can also include a first rotatable support roller 209 and a second support roller 208. The first support roller 209 and the second support roller 208 are in contact with the scraper belt 203 and are used to support the scraper belt 203 and keep it taut.

[0033] The carrying mechanism 210 is located below the scraper 202 and the scraping belt 203. The carrying mechanism 210 is used to carry the electrode 101 to be processed, and to transport the electrode 101 and pass the electrode 101 through the scraper 202. For example, the carrying mechanism 210 can be a conveyor. For another example, the carrying mechanism 210 can include a platform and a winding and unwinding mechanism for the electrode 101. The structure of the winding and unwinding mechanism for the electrode 101 is similar to the scraping belt winding and unwinding mechanism 205 described above. The platform can be located between the winding roller 206 and the unwinding roller 207 of the winding and unwinding mechanism for the electrode 101. The top surface of the platform is used to contact the back of the electrode 101 to support the electrode 101. The scraper 202 can press the scraping belt 203 and the electrode 101 onto the platform, so that the scraper 202 and the scraping belt 203 scrape away a portion of the slurry 102. The platform and the scraper 202 cooperate with each other so that the scraper 202 can apply sufficient pressure to the pole piece 101 so that the scraper 202 can scrape away the slurry 102 .

[0034] The drive mechanism 204 is connected to the scraper 202 and is used to drive the scraper 202 to move so that the scraping edge 216 is raised and lowered relative to the support mechanism 210. For example, in some embodiments, the drive mechanism 204 includes a motor connected to the top of the scraper 202. The motor can drive the scraper 202 to rotate, thereby raising and lowering the scraping edge 216 at the bottom of the scraper 202. For another example, in other embodiments, the drive mechanism 204 is configured as a module capable of driving an object in linear motion, such as a screw module, a belt module, or a rack and pinion module. In this case, the scraper 202 can move linearly in a vertical direction while maintaining a constant angle, thereby raising and lowering the scraping edge 216 at the bottom of the scraper 202.

[0035] like Figure 5 As shown, when it is necessary to scrape the slurry 102 off the current collector 103, the drive mechanism 204 can drive the scraper 202 to move, causing the scraper edge 216 to descend, thereby bringing the scraper belt 203, which is pressed against the scraper 202, into contact with the slurry 102. As the pole piece 101 is transported, the pole piece 101 moves relative to the scraper 202, and a portion of the slurry 102 on the current collector 103 is scraped off. When it is no longer necessary to scrape the slurry 102 off the current collector 103, the drive mechanism 204 can drive the scraper 202 to lift, causing the scraper edge 216 to rise, and the scraper belt 203 and the slurry 102 to separate and not contact each other. Since the scraping belt 203 is continuously transported during the process of scraping away the slurry 102, the slurry 102 scraped off and attached to the scraping belt 203 is continuously sent away from the electrode 101 (sent to the winding roller 206). This helps to reduce the risk of slurry 102 accumulation at the edge of the slot 104 finally formed, thereby reducing the risk of uneven thickness of the electrode 101 and excessive local thickness of the battery cell.

[0036] In some embodiments, when the scraper belt 203 scrapes the slurry 102 of the electrode 101, the angle between the scraper 202 and the carrying surface 211 is A, 30°≤A≤120°. This arrangement enables the combination of the scraper 202 and the scraper belt 203 to smoothly scrape off the slurry 102, and makes the scraper 202 and the scraper belt 203 less obstructive to the transportation of the electrode 101, and less likely to damage the electrode 101. It should be noted that the angle between the scraper 202 and the carrying surface 211 is based on the angle on the downstream side of the scraper 202. For example, if the electrode 101 is transported from left to right, the right side is downstream of the scraper 202, and the left side is upstream of the scraper 202. The angle between the scraper 202 and the carrying surface 211 refers to the angle between the right side of the scraper 202 and the carrying surface 211.

[0037] like Figure 5 As shown, in some embodiments, the scraper 202 is inclined relative to the supporting surface 211, and the scraping edge 216 is located at the bottom end of the scraper 202. The bottom end and the top end of the scraper 202 are arranged in sequence along the conveying direction of the electrode 101. For example, when the electrode 101 is conveyed from left to right, the bottom end of the scraper 202 is located to the left of the top end of the scraper 202. Because the scraper 202 is inclined, as the electrode 101 moves relative to the scraper 202, the scraped slurry 102 moves diagonally upward along the inclined scraper 202, thereby improving the efficiency of the scraper 202 in scraping the slurry 102.

[0038] When the scraper 202 is tilted relative to the carrying surface 211, the scraper belt rewinding and unwinding mechanism 205 is used to drive the scraper belt 203 to pass through the lower space 215 of the scraper 202, the scraping edge 216 and the upper space 214 of the scraper 202 in sequence. This arrangement is conducive to reducing the risk of the slurry 102 attached to the scraper belt 203 falling back onto the pole piece 101. Among them, the upper space 214 is the space directly above the scraper 202, and the lower space 215 is the space directly below the scraper 202 and above the carrying surface 211. Figure 3 As shown, the first straight line L1 is a vertical line passing through the bottom end of the scraper 202, and the second straight line L2 is a vertical line passing through the top end of the scraper 202. The first straight line L1, the second straight line L2, and the upper surface of the scraper 202 collectively enclose an upper space 214. The first straight line L1, the second straight line L2, the lower surface of the scraper 202, and the supporting surface 211 collectively enclose a lower space 215.

[0039] Since the scraping belt 203 transports the scraped slurry 102 only after passing the scraping edge 216, the scraped slurry 102 adheres to the scraping belt 203 and is transported to the upper space 214. Due to the obstruction of the scraping belt 203 and the scraper 202, the slurry 102 scraped off and adhered to the scraping belt 203 is not easy to fall back onto the electrode 101, thereby preventing the slurry 102 from falling back onto the electrode 101 and causing the slurry 102 to accumulate on the electrode 101.

[0040] The scraper belt 203 includes a first section 212 and a second section 213. The first section 212 is located in the lower space 215, and the second section 213 is located in the upper space 214. The intersection of the first section 212 and the second section 213 abuts the scraper edge 216. More specifically, the first section 212 is located between the first support roller 209 and the scraper edge 216, and the second section 213 is located between the scraper edge 216 and the second support roller 208. When the scraper belt 203 scrapes the slurry 102 on the pole piece 101, the angle between the first section 212 and the second section 213 is acute. This arrangement makes the portion of the scraper belt 203 used for scraping the slurry 102 more sharp, improving the efficiency of scraping the slurry 102. When the scraper belt 203 scrapes the slurry 102 on the pole piece 101, the angle between the first section 212 and the bearing surface 211 is acute. This arrangement prevents the first section 212 from being adhered to the slurry 102, thereby preventing the portion of the electrode 101 that does not require processing of the groove 104 from being thinned. When the scraping belt 203 scrapes the slurry 102 on the electrode 101, the angle between the second section 213 and the vertical plane is acute, which reduces the risk of the slurry 102 attached to the second section 213 falling back onto the electrode 101.

[0041] like Figure 4 As shown, in some embodiments, the scraping strip 203 completely covers the scraping edge 216. The width of the scraping strip 203 is W1, and the length of the scraping edge 216 is W2. W1 and W2 satisfy the following: 0≤W1-W2≤1mm. The scraping strip 203 completely covers the scraping edge 216 to prevent the slurry 102 from remaining and accumulating at the scraping edge 216. Because the scraping strip 203 is pressed tightly against the scraping edge 216, the difference between W1 and W2 is no greater than 1mm, which prevents the scraping strip 203 from being too wide, thereby preventing the scraping strip 203 from collapsing and scraping areas of the pole piece 101 where the slurry 102 does not need to be scraped away.

[0042] In some embodiments, the scraper edge 216 is straight, and the straightness of the scraper edge 216 is less than or equal to 0.05 mm. This arrangement allows the scraper 202 and the scraping belt 203 to evenly scrape the slurry 102, reducing the risk of uneven thickness of the slurry 102 on the pole piece 101. The thickness of the scraper 202 is not less than 0.2 mm and not more than 2 mm, so that the stiffness and strength of the scraper 202 are moderate, so that the scraper 202 can stably scrape the slurry 102 on the pole piece 101. The thickness of the scraping belt 203 is not less than 5 μm and not more than 200 μm, which makes the thickness of the scraping belt 203 moderate, the scraping belt 203 is not easily punctured by the scraper 202, and the scraping belt 203 has good flexibility.

[0043] An embodiment of the present invention further provides a method for processing a pole piece slot, the method comprising the following steps: S1: transporting the electrode 101 and passing the electrode 101 through the scraper 202; S2: driving the scraper 202 close to the electrode 101 so that the scraping belt 203 pressed by the scraping edge 216 of the scraper 202 contacts the slurry 102 on the current collector 103; S3: Keep conveying the electrode sheet 101 and drive the scraper belt 203 to move, so that the scraper belt 203 contacts the scraper edge 216 and passes through the scraper edge 216, so that the slurry 102 scraped by the scraper belt 203 is conveyed away by the scraper belt 203; S4: lifting the scraper 202 to separate the scraping belt 203 from the slurry 102 on the current collector 103 .

[0044] Since the scraping belt 203 is continuously transported during the process of scraping away the slurry 102, the slurry 102 scraped off and attached to the scraping belt 203 is continuously sent away from the electrode 101 (sent to the winding roller 206). This helps to reduce the risk of slurry 102 accumulation at the edge of the slot 104 finally formed, thereby reducing the risk of uneven thickness of the electrode 101 and excessive local thickness of the battery cell.

[0045] The following table shows the effects of processing the slot 104 using the above-mentioned processing equipment, as well as the effects of processing the slot 104 using the prior art (Comparative Examples 1 and 2). Examples 1 to 7 use the processing equipment 201 of the present application to process the slot 104. Comparative Example 1 processes the slot 104 by scraping the slurry 102 with a scraper 202 and sucking the slurry 102 with a nozzle. Comparative Example 2 processes the slot 104 by laser cleaning.

[0046] As can be seen from the table below, the processing equipment 201 of the embodiment of the present application can effectively solve the problem of slurry 102 accumulation at the edge of the slot 104, and can effectively scrape away the slurry 102 on the current collector 103 to prevent slurry 102 from remaining in the slot 104.

[0047]

[0048] In the description of the present invention, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Claims

1. Pole piece slot processing equipment, characterized in that: include: scraper, including scraping edge; A scraping belt, one side surface of which contacts the edge of the scraping material, and the other side surface of which is used to contact the slurry of the electrode, and the scraping belt can be adhered to by the slurry; a scraper belt reeling and unreeling mechanism for conveying the scraper belt so that the scraper belt passes over the scraper material edge while in contact with the scraper material edge; A carrying mechanism, the carrying mechanism is located below the scraper and the scraping belt, the carrying mechanism is used to carry the electrode to be processed, and is used to transport the electrode and make the electrode pass through the scraper; A driving mechanism is connected to the scraper, and is used to drive the scraper to move so that the scraping edge rises and falls relative to the supporting mechanism.

2. The electrode slot processing equipment according to claim 1, characterized in that: The scraper is made of one of stainless steel, tungsten steel and resin; And / or, the scraper belt is made of one of PET, PI, PVC, paper and non-woven fabric.

3. The pole piece slot processing equipment according to claim 1, characterized in that: The carrying mechanism includes a carrying surface for carrying the pole piece. When the scraper scrapes the slurry of the pole piece, the angle between the scraper and the carrying surface is A, and 30°≤A≤120°.

4. The pole piece slot processing equipment according to claim 1, characterized in that: The scraping belt completely covers the scraping material edge, the width of the scraping belt is W1, the length of the scraping material edge is W2, and 0≤W1-W2≤1mm.

5. The pole piece slot processing equipment according to claim 1, characterized in that: The straightness of the scraper edge is less than or equal to 0.05 mm; and / or, the scraper has a thickness of not less than 0.2 mm and not more than 2 mm; And / or, the scraping tape has a thickness of not less than 5 μm and not more than 200 μm.

6. The pole piece slot processing equipment according to claim 1, characterized in that: The scraper is inclined relative to the carrying surface, the scraping edge is located at the bottom end of the scraper, and the bottom end and the top end of the scraper are arranged in sequence along the conveying direction of the electrode piece.

7. The pole piece slot processing equipment according to claim 1, characterized in that: The carrying mechanism includes a carrying surface for carrying the pole piece, the scraper is inclined relative to the carrying surface, and the scraper belt rewinding and unwinding mechanism is used to drive the scraper belt to pass through the lower space of the scraper, the scraping material edge and the upper space of the scraper in sequence.

8. The pole piece slot processing equipment according to claim 7, characterized in that: The scraper belt includes a first section and a second section connected to each other, the first section is located in the lower space, the second section is located in the upper space, and the intersection of the first section and the second section abuts against the edge of the scraper; When the scraping belt scrapes the slurry of the electrode: The angle between the first section and the second section is an acute angle; and / or the angle between the first section and the bearing surface is an acute angle; and / or the angle between the second section and the vertical plane is an acute angle.

9. A method for processing a pole piece slot, characterized in that: The following steps are involved: Transporting a pole piece and passing the pole piece through a scraper, the pole piece including a current collector and a slurry coated on the current collector; driving the scraper to approach the pole piece so that the scraping belt pressed by the scraping edge of the scraper contacts the slurry on the current collector; Maintaining the feeding of the electrode and driving the scraper belt to move, so that the scraper belt contacts the scraper edge and passes the scraper edge, so that the slurry scraped by the scraper belt is transported away by the scraper belt; The scraper is lifted to separate the scraping belt from the slurry on the current collector.

10. The pole piece slot processing method according to claim 9, characterized in that: The scraper is made of one of stainless steel, tungsten steel and resin; And / or, the scraper belt is made of one of PET, PI, PVC, paper and non-woven fabric.

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