Lithium battery pole piece rolling device and working method

Abstract

The application relates to a lithium battery pole piece rolling device and a working method, which comprises a shell, one side of the shell is provided with an inlet, the other side is provided with an outlet, along the movement direction of the pole piece, a cleaning mechanism and a rolling mechanism are sequentially arranged in the shell, the cleaning mechanism comprises upper and lower scrapers, a pole piece passing area is arranged between the upper and lower scrapers, the two end portions of the upper and lower scrapers are sealingly connected with the inner side of the shell, a dust falling port is arranged on the bottom wall of the shell corresponding to the lower scraper, a connecting roller is arranged above the dust falling port, a plurality of side plates are arranged on the roller surface of the connecting roller in the circumferential direction, the connecting roller is connected with a rotating driving element fixed in the shell, air fans are arranged on the two sides of the shell, the air fans are located in front of the upper and lower scrapers, the air fan on one side is located above the pole piece passing area, and the air fan on the other side is located below the pole piece passing area. The rolling device of the application does not need to stop when cleaning the collecting device, and does not affect the production progress.

Description

Technical Field

[0001] This invention relates to the field of lithium battery electrode technology, specifically to a lithium battery electrode rolling device and its working method. Background Technology

[0002] The statements herein provide only background information in relation to this invention and do not necessarily constitute prior art.

[0003] In the manufacturing process of lithium batteries, electrode rolling is a crucial step that has a significant impact on the final performance of the battery. The main purpose of electrode rolling is to increase the compaction density of the electrode material through mechanical force, thereby improving the battery's discharge capacity, reducing internal resistance, and enhancing the battery's cycle stability and safety. However, existing rolling equipment can only clean the pressure rollers and cannot remove impurities from the electrode sheets. Impurities inevitably remain on the electrode sheets during production. Direct rolling can easily lead to defects in the rolled electrode sheets, requiring rework later. Currently, there is a new type of rolling equipment for ternary lithium-ion power batteries used in new energy vehicles, which has a cleaning mechanism to clean the electrode surface during operation. However, in the aforementioned rolling equipment, both the pressure rollers and the cleaning mechanism are exposed to the external environment, making it easy for external dust to fall onto the pressure rollers and damage the electrode sheets during rolling. If it is placed inside a closed housing, the dust cleaned by the cleaning mechanism is collected in a collection box inside the housing. When the collection box needs cleaning, because it is located inside the housing, the machine must be stopped, the housing opened, and the collection box cleaned. This operation is complex and affects production progress. Furthermore, when cleaning electrode sheets of different thicknesses, the cleaning mechanism needs to be equipped with complex structures such as springs, sliders, and grooves to meet the cleaning requirements of electrode sheets of different thicknesses, increasing the complexity of the device and raising manufacturing costs. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a lithium battery electrode rolling device and working method, which overcomes the defects of the current rolling device with electrode cleaning function.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: In a first aspect, embodiments of the present invention provide a lithium battery electrode rolling device, comprising a housing, an inlet on one side of the housing and an outlet on the other side, and a cleaning mechanism and a rolling mechanism sequentially arranged inside the housing along the movement direction of the electrode. The cleaning mechanism includes an upper scraper and a lower scraper, with an electrode passage area between the upper scraper and the lower scraper. The two ends of the upper scraper and the lower scraper are sealed to the inner side of the housing. A dust collection port is provided on the bottom wall of the housing below the lower scraper, and a connecting roller is provided above the dust collection port. The roller surface of the connecting roller is provided with multiple side plates along the circumferential direction. The connecting roller is connected to a rotating drive component fixed to the housing. Fans are provided on both sides of the housing, with the fans located in front of the upper scraper and the lower scraper. One fan is located above the electrode passage area, and the other fan is located below the electrode passage area.

[0006] Optionally, the upper scraper includes a first scraper section and a second scraper section arranged at a set obtuse angle. The first scraper section is arranged parallel to the conveying direction of the electrode sheet, and one end of the second scraper section is integrally connected to the first scraper section, while the other end is used to contact the electrode sheet.

[0007] Optionally, the lower scraper includes a third scraper section and a fourth scraper section arranged at an obtuse angle. The third scraper section is arranged parallel to the conveying direction of the electrode sheet, and one end of the fourth scraper section is integrally connected to the third scraper section, while the other end is used to contact the electrode sheet.

[0008] Optionally, the third scraper section is provided with a material discharge port.

[0009] Optionally, a fourth plate is provided on one side of the material discharge port, and a baffle fixed to the third plate is provided on the other side.

[0010] Optionally, the rolling mechanism includes an upper pressure roller group and a lower pressure roller group arranged opposite to each other, with an electrode sheet passing through area between the upper pressure roller group and the lower pressure roller group. The upper pressure roller group is connected to the upper pressure roller bracket, and the lower pressure roller group is connected to the lower pressure roller bracket. The upper pressure roller bracket is connected to a lifting drive component fixed to the top of the housing, and the lower pressure roller bracket is fixedly connected to the housing.

[0011] Optionally, the upper scraper is fixedly connected to the upper pressure roller bracket, and the lower scraper is fixedly connected to the lower pressure roller bracket. A sealing strip is provided between the two ends of the upper and lower scrapers and the inner side of the housing.

[0012] Optionally, the upper pressure roller assembly includes a plurality of upper pressure rollers distributed along the electrode conveying direction, wherein one of the upper pressure rollers is connected to a first rotation drive member fixed to the upper pressure roller bracket, serving as an active upper pressure roller; The lower pressure roller assembly includes multiple lower pressure rollers distributed along the electrode conveying direction. The lower pressure roller directly below the active upper pressure roller serves as the active lower pressure roller, and the active lower pressure roller is connected to a second rotation drive component fixed to the lower pressure roller bracket.

[0013] Optionally, a filter screen is provided on the outside of the fan.

[0014] Secondly, embodiments of the present invention provide a method for operating the lithium battery electrode rolling device described in the first aspect. The rolling mechanism rolls the battery electrode that enters the housing through the feed port and drives the battery electrode to be sent out through the discharge port. During the movement of the battery electrode, the upper scraper scrapes off impurities on the upper surface of the electrode and the lower scraper scrapes off impurities on the lower surface of the electrode. The impurities scraped off by the upper scraper are blown to one side of the electrode by the fan above the electrode crossing area and fall down. The falling impurities are blown to the dust discharge port by the fan below the electrode crossing area and sent out by the rotation of the connecting roller and the side plate. The impurities scraped off by the lower scraper fall directly to the dust discharge port and are sent out by the rotation of the connecting roller and the side plate.

[0015] The beneficial effects of this invention are as follows: 1. The lithium battery electrode rolling device of the present invention has a rolling mechanism located inside a housing, which prevents dust from the external environment from falling onto the pressure rollers of the rolling mechanism. It is equipped with an upper scraper and a lower scraper, which can scrape off impurities on the upper and lower surfaces of the battery electrode. A fan is provided, and the impurities scraped by the upper scraper can be sent to the dust discharge port by the fan and discharged under the rotation of the connecting roller and the side plate. The impurities scraped by the lower scraper can fall directly to the dust discharge port and be discharged by the connecting roller and the side plate. Therefore, the cleaned dust can be sent to the outside through the connecting roller, the side plate and the dust discharge port and collected by the collection device. When cleaning the collection device, it is not necessary to disassemble the housing of the rolling device, which is convenient to operate and can be carried out without stopping the machine, thus avoiding the impact on the production schedule.

[0016] 2. The lithium battery electrode rolling device of the present invention has an upper scraper connected to an upper pressure roller support and a lower scraper connected to a lower pressure roller support. For battery electrodes of different thicknesses, the upper and lower scrapers can be adjusted simultaneously while adjusting the rolling mechanism. The scraper is directly connected to the pressure roller support to achieve adjustment, eliminating the need for complex adjustment structures such as springs, sliders, and grooves. The structure is simpler and the equipment manufacturing cost is lower. Attached Figure Description

[0017] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0018] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention. Figure 3 ; Figure 4 This is an exploded view of the overall structure of Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the roller pressing mechanism in Embodiment 1 of the present invention. Figure 1 ; Figure 6 This is a schematic diagram of the roller pressing mechanism in Embodiment 1 of the present invention. Figure 2 ; Figure 7 This is a schematic diagram of the upper and lower scrapers in Embodiment 1 of the present invention; Figure 8 This is a schematic diagram of the assembly of the connecting roller and the side plate in Embodiment 1 of the present invention; The components are as follows: 1. Shell, 2. Inlet, 3. Outlet, 4. Flexible diaphragm, 5. Upper pressure roller, 6. Connecting frame, 7. Top frame, 8. Electric telescopic rod, 9. Lower pressure roller, 10. Base frame, 11. First rotating drive component, 12. Second rotating drive component, 13. First plate, 14. Second plate, 15. Third plate, 16. Fourth plate, 17. Ash discharge port, 18. Connecting roller, 19. Side plate, 20. Third rotating drive component, 21. First fan, 22. Connecting ring, 23. Filter screen, 24. Discharge port, 25. Baffle. Detailed Implementation

[0019] For ease of description, the words "upper" and "lower" appearing in this invention only indicate that they are consistent with the upper and lower directions of the accompanying drawings and do not limit the structure. They are merely for the purpose of facilitating the description of this invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0020] Example 1 This embodiment provides a lithium battery electrode rolling device, such as... Figures 1-4 As shown, the housing includes a shell 1. In this embodiment, the shell 1 adopts a cuboid structure. In other embodiments, the shell can also adopt a cube or cylinder structure. Those skilled in the art can set it according to actual needs. One side of the shell wall is provided with a feed inlet 2, and the other side of the shell wall is provided with a discharge outlet 3. A flexible diaphragm 4 is provided at the feed inlet 2. Preferably, the flexible diaphragm 4 at the feed inlet 2 is a rubber diaphragm. A flexible diaphragm is provided at the discharge outlet 3. Preferably, the flexible diaphragm at the discharge outlet is a rubber diaphragm. Cutting slits are provided on the flexible diaphragms of both the feed inlet 2 and the discharge outlet 3. The battery electrode can pass through the flexible diaphragm through the cutting slits. Through the flexible diaphragm, the shell 1 forms a closed cavity, and dust from the external environment will not enter the internal space of the shell through the feed inlet and the discharge outlet.

[0021] Inside the housing 1, along the direction of movement of the battery electrode, a cleaning mechanism and a rolling mechanism are sequentially arranged. The rolling mechanism is used to roll the battery electrode, and the cleaning mechanism is used to clean the upper and lower surfaces of the battery electrode before rolling, removing dust and impurities from the upper and lower surfaces of the battery electrode, and preventing dust and impurities from damaging the battery electrode during rolling.

[0022] like Figures 5-6 As shown, the rolling mechanism includes an upper pressure roller group and a lower pressure roller group, with a space between the upper pressure roller group and the lower pressure roller group for the battery electrode to pass through. The upper pressure roller group and the lower pressure roller group together roll the battery electrode.

[0023] The upper pressure roller assembly is mounted on the upper pressure roller bracket and includes multiple upper pressure rollers 5 distributed along the battery electrode conveying direction. The upper pressure roller bracket includes a connecting frame 6 and a top frame 7. The two ends of the multiple upper pressure rollers 5 are rotatably connected to the connecting frame 6. The upper pressure rollers 5 can rotate around their own axis. The connecting frame 6 is fixedly connected to the bottom end of the top frame 7. The top frame 7 is connected to multiple lifting drive components, which are fixed to the top shell wall of the housing 1.

[0024] In this embodiment, a lifting drive is connected to each of the four corners of the top frame 7. In this embodiment, the lifting drive adopts an electric telescopic rod 8 with its axis set vertically. The fixed part of the electric telescopic rod 8 is connected to the top shell wall of the housing 1, and the telescopic part is connected to the top frame 7. The electric telescopic rod 8 can drive the connecting frame 6 to rise and fall through the top frame 7, thereby driving multiple upper pressure rollers 5 to rise and fall, and applying roller pressure to battery electrode sheets of different thicknesses.

[0025] The lower pressure roller assembly is mounted on the lower pressure roller bracket and includes multiple lower pressure rollers 9 distributed along the battery electrode conveying direction. Both ends of the multiple lower pressure rollers 9 are rotatably connected to the base frame 10. The lower pressure rollers 9 can rotate around their own axis. The base frame 10 is fixedly connected to the shell wall of the housing 1 as a lower pressure roller bracket.

[0026] At least one upper pressure roller 5 is connected to a first rotation drive member. The first rotation drive member 11 is fixed on the connecting frame 6. The first rotation drive member 11 can drive the upper pressure roller 5 to rotate. The upper pressure roller 5 serves as an active upper pressure roller.

[0027] The lower pressure roller directly below the active upper pressure roller serves as the active lower pressure roller. This active lower pressure roller is connected to the second rotation drive 12 fixed to the base frame 10. The second rotation drive 12 can drive the active lower pressure roller to rotate around its own axis.

[0028] In this embodiment, along the conveying direction of the battery electrode, the upper pressure roller 5 at the foremost end is the active upper pressure roller, and the lower pressure roller 9 at the foremost end is the active lower pressure roller.

[0029] The first rotation drive component 11 uses a first motor, which is fixed on the connecting frame 6 and its output shaft is connected to the active upper pressure roller. The second rotation drive component 12 uses a second motor, which is fixed on the base frame 10 and its output shaft is connected to the active lower pressure roller.

[0030] The active upper and lower pressure rollers can rotate around their own axes under the drive of the first and second motors, pressing the battery electrode sheets while using friction to provide the power for the battery electrode sheets to move.

[0031] like Figure 7 As shown, the cleaning mechanism includes an upper scraper and a lower scraper. The upper scraper is used to contact the upper surface of the battery electrode to scrape off dust and impurities from the upper surface of the battery electrode, and the lower scraper is used to contact the lower surface of the battery electrode to scrape off dust and impurities from the lower surface of the battery electrode.

[0032] In this embodiment, the upper scraper is fixedly connected to the front side of the top frame 7, and the lower scraper is fixedly connected to the front side of the base frame 10. When cleaning battery electrode sheets of different thicknesses, the upper and lower scrapers only need to be adjusted synchronously with the roller pressing mechanism. There is no need to set up a special adjustment mechanism for the upper and lower scrapers, which simplifies the complexity of the equipment and reduces the manufacturing cost.

[0033] In this embodiment, the two ends of the upper scraper and the lower scraper are sealed to the inner side of the housing 1. Preferably, the two ends of the upper scraper and the lower scraper are provided with sealing strips. Preferably, the sealing strips are rubber sealing strips. The upper scraper is slidably connected to the inner side of the housing.

[0034] The upper scraper includes a first plate portion 13 and a second plate portion 14 arranged at a set obtuse angle. The first plate portion 13 is arranged parallel to the conveying direction of the battery electrode, and the second plate portion 14 is arranged at a downward inclination. One end of the second plate portion 14 is integrally connected to the first plate portion 13, and the other end is used to contact the upper surface of the battery electrode to clean the upper surface of the battery electrode.

[0035] The lower scraper includes a third plate portion 15 and a fourth plate portion 16 arranged at a set obtuse angle. The third plate portion 15 is arranged parallel to the conveying direction of the battery electrode. One end of the third plate portion 15 is fixedly connected to the front side of the base frame 10, and the other end is integrally connected to one end of the fourth plate portion 16. The fourth plate portion 16 is inclined upward. One end of the fourth plate portion 16 is integrally connected to the third plate portion 15, and the other end is used to contact the lower surface of the battery electrode to clean the lower surface of the battery electrode.

[0036] A space is formed between the upper and lower scrapers for the battery electrodes to pass through.

[0037] Furthermore, the ends of the second plate portion 14 and the fourth plate portion 16 that are in contact with the battery electrode are provided with flexible scrapers made of rubber material. The flexible scrapers are in contact with the surface of the battery electrode to prevent frictional damage to the surface of the battery electrode.

[0038] In this embodiment, the remaining area of ​​the battery electrode within the housing is defined as the electrode passage area, the space between the upper scraper and the lower scraper is the electrode passage area, and the space between the upper pressure roller 5 and the lower pressure roller 9 is the electrode passage area.

[0039] A dust collection port 17 is provided on the bottom shell wall corresponding to the lower scraper, and a connecting roller 18 is provided above the dust collection port 17. The connecting roller 18 is rotatably connected to the shell wall of the shell 1. Figure 8 As shown, multiple side plates 19 are evenly spaced along the circumferential direction on the roller surface of the connecting roller 18. When the connecting roller 18 rotates, it can drive the side plates 19 to rotate. The side plates 19 can extend into the ash discharge port 17. The connecting roller 18 is connected to the third rotation drive 20 fixed to the shell wall of the housing 1. The third rotation drive 20 is a third motor. The output shaft of the third motor is connected to the connecting roller 18, which can drive the connecting roller 18 to rotate around its own axis.

[0040] In the housing, one of the two housing walls perpendicular to the two housing walls where the inlet 2 and outlet 3 are located is equipped with a first fan 21, and the other housing wall is equipped with a second fan. Along the conveying direction of the battery electrode, the first fan 21 and the second fan are located in front of the upper scraper and the lower scraper. The first fan 21 is located above the electrode passage area, and the second fan is located below the electrode passage area. The airflow generated by the first fan 21 and the second fan is directed towards the inside of the housing.

[0041] For the first fan 21, an opening is provided on the shell wall of the housing on which the first fan is installed. The first fan is installed inside the opening. A connecting ring 22 is provided on the shell wall along the edge of the opening. The connecting ring 22 is fixed on the outer side of the shell wall of the housing 1. The connecting ring 22 is detachably and fixedly connected to the filter screen 23 by a plurality of bolts evenly distributed along the circumferential direction.

[0042] In another embodiment, the connecting ring 22 is provided with a circumferential slot, and the edge of the filter screen 23 is provided with a circumferential insert plate that matches the circumferential slot. The filter screen 23 is connected to the connecting ring 22 by the circumferential slot and the circumferential insert plate.

[0043] The filter screen 23 is located on the outside of the first fan 21 to prevent dust and impurities from the external environment from entering the housing.

[0044] For the second fan, an opening is provided on the shell wall of the housing on which the second fan is installed. The second fan is installed inside the opening. Connecting rings distributed along the opening are provided on the outer side of the shell wall of the housing 1. The connecting rings are fixedly connected to the outer side of the shell wall. The connecting rings are detachably fixedly connected to the filter screen 23. The filter screen 23 is located on the outside of the second fan to prevent the second fan from introducing dust and impurities from the external environment into the housing. The connection method between the filter screen on the outside of the second fan and the connecting ring is the same as the connection method between the filter screen 23 and the connecting ring 22 on the outside of the first fan, and will not be described again here.

[0045] In this embodiment, the first fan 21 can blow the dust and impurities scraped off by the upper scraper on the upper surface of the battery electrode, and blow the dust and impurities toward the shell wall where the second fan is installed, so that the dust and impurities are removed from the battery electrode and fall to the corresponding position of the second fan under the action of gravity. Under the action of the second fan, the dust and impurities are blown to the space between two adjacent side plates 19 on the connecting roller 18. The connecting roller 18 drives the side plates 19 to rotate, and discharges the dust and impurities through the dust discharge port 17.

[0046] The lower scraper scrapes the dust and impurities scraped off the lower surface of the battery electrode directly onto the connecting roller 18 between two adjacent side plates under the action of gravity. The connecting roller 18 drives the side plate 19 to rotate, and the side plate 19 discharges the dust and impurities through the dust discharge port 17.

[0047] In this embodiment, the dust discharge port 17 is directly connected to the collection device through a pipe. The collection device can be a collection box, and the discharged dust and impurities can be directly collected into the collection box through the pipe.

[0048] When cleaning the collection box, there is no need to disassemble the housing 1 of the roller pressing device; the collection box can be cleaned directly. This is convenient and can be done without stopping the machine, thus avoiding any impact on the production schedule.

[0049] Furthermore, as the dust on the upper surface of the electrode is blown away by the wind and falls from the battery electrode, the dust may enter the space between the lower scraper and the battery electrode through the gap between the upper scraper and the lower scraper. In order to prevent the dust from accumulating on the lower scraper, the third plate portion 15 of the lower scraper is provided with a discharge port 24. The dust and impurities falling on the third plate portion 15 can fall through the discharge port 24 and then enter the space between two adjacent side plates 19 on the connecting roller 18.

[0050] Furthermore, the fourth plate portion 16 is provided on one side of the discharge port 24, and a baffle 25 is provided on the other side of the discharge port. The baffle 25 can block dust and impurities from moving toward the lower pressure roller 9 and prevent dust and impurities from adhering to the lower pressure roller 9. In this embodiment, the baffle 25 is inclined, and the dust and impurities falling onto the baffle 25 can slide down to the discharge port 24 and be discharged through the discharge port 24.

[0051] In this embodiment, when impurities and dust enter the space between the upper and lower scrapers through the gap between the upper and lower scrapers, most of the dust and impurities can fall to the third plate 15 under the action of gravity and will not fall to the upper surface of the electrode. Therefore, in this embodiment, only the cleaning of this part of the dust is considered. The dust and impurities that fall back to the upper surface of the electrode are non-existent or very few and can be ignored.

[0052] Example 2 This embodiment provides a working method for the lithium battery electrode rolling device described in Embodiment 1: The battery electrode enters the housing 1 through the cut slit of the flexible separator 4 at the feed inlet 2, passes through the space between the upper scraper and the lower scraper, and the space between the upper pressure roller 5 and the lower pressure roller 9, and then extends out through the cut slit of the flexible separator at the discharge outlet 3.

[0053] The active upper and lower pressure rollers rotate under the drive of the first and second motors, driving the battery electrodes forward.

[0054] As the battery electrode plates move forward, the upper scraper removes dust and impurities from the upper surface of the battery electrode plates, while the lower scraper removes dust and impurities from the lower surface of the battery electrode plates.

[0055] The dust and impurities scraped off the surface of the battery electrode sheet move toward the housing wall where the second fan is installed under the action of the first fan 21. After detaching from the battery electrode sheet, they fall under the action of gravity. When they fall to the position of the second fan, they are blown into the space between two adjacent side plates 19 on the connecting roller 18 under the action of the second fan. The connecting roller 18 drives the side plates 19 to rotate, and the side plates 19 discharge the impurities and dust through the dust discharge port 17.

[0056] Dust and impurities scraped off the lower surface of the battery electrode fall directly into the space between adjacent side plates 19 under the action of gravity. The connecting roller 18 drives the side plate 19 to rotate, and discharges the dust and impurities through the dust discharge port 17.

[0057] The roller pressing device and working method of this embodiment can remove impurities and dust from the upper and lower surfaces of the battery electrode, ensuring the surface quality of the electrode. Moreover, the removed dust and impurities are discharged to the outside of the casing for collection. When cleaning the collection device, there is no need to stop the machine, thus avoiding affecting the production schedule.

[0058] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A lithium battery electrode rolling device, characterized in that, The device includes a housing with an inlet on one side and an outlet on the other. Along the direction of electrode movement, a cleaning mechanism and a roller pressing mechanism are sequentially arranged inside the housing. The cleaning mechanism includes an upper scraper and a lower scraper. The area between the upper and lower scrapers is the electrode passage area. The two ends of the upper and lower scrapers are sealed to the inner side of the housing. The bottom wall of the housing below the lower scraper is provided with a dust collection port. A connecting roller is provided above the dust collection port. The roller surface of the connecting roller is provided with multiple side plates along the circumference. The connecting roller is connected to a rotating drive component fixed to the housing. Fans are provided on both sides of the housing. The fans are located in front of the upper and lower scrapers. One fan is located above the electrode passage area, and the other fan is located below the electrode passage area. The upper scraper includes a first scraper section and a second scraper section set at a predetermined obtuse angle. The first scraper section is set parallel to the conveying direction of the electrode sheet. One end of the second scraper section is integrally connected to the first scraper section, and the other end is used to contact the electrode sheet. The lower scraper includes a third scraper section and a fourth scraper section set at an obtuse angle. The third scraper section is set parallel to the conveying direction of the electrode sheet. One end of the fourth scraper section is integrally connected to the third scraper section, and the other end is used to contact the electrode sheet. The third scraper section is provided with a discharge port. A fourth plate section is provided on one side of the discharge port, and a baffle fixed to the third plate section is provided on the other side.

2. The lithium battery electrode rolling device as described in claim 1, characterized in that, The roller pressing mechanism includes an upper pressure roller group and a lower pressure roller group arranged opposite to each other. The area between the upper pressure roller group and the lower pressure roller group is the electrode sheet passage area. The upper pressure roller group is connected to the upper pressure roller bracket, and the lower pressure roller group is connected to the lower pressure roller bracket. The upper pressure roller bracket is connected to a lifting drive component fixed to the top of the housing, and the lower pressure roller bracket is fixedly connected to the housing.

3. The lithium battery electrode rolling device as described in claim 2, characterized in that, The upper scraper is fixedly connected to the upper pressure roller bracket, and the lower scraper is fixedly connected to the lower pressure roller bracket. Sealing strips are provided between the two ends of the upper and lower scrapers and the inner side of the housing.

4. A lithium battery electrode rolling device as described in claim 2, characterized in that, The upper pressure roller group includes multiple upper pressure rollers distributed along the electrode conveying direction, one of which is connected to a first rotation drive component fixed to the upper pressure roller bracket, serving as an active upper pressure roller. The lower pressure roller group includes multiple lower pressure rollers distributed along the electrode conveying direction. The lower pressure roller directly below the active upper pressure roller serves as the active lower pressure roller, and the active lower pressure roller is connected to a second rotation drive component fixed to the lower pressure roller bracket.

5. A lithium battery electrode rolling device as described in claim 1, characterized in that, The fan is equipped with a filter screen on its outer side.

6. A method for operating the lithium battery electrode rolling device according to any one of claims 1-5, characterized in that: The rolling mechanism rolls the battery electrode sheets that enter the housing through the feed inlet and drives them out through the discharge outlet. During the movement of the battery electrode sheets, the upper scraper removes impurities from the upper surface of the electrode sheets, and the lower scraper removes impurities from the lower surface of the electrode sheets. The impurities removed by the upper scraper are blown to one side of the electrode sheets by the fan above the electrode sheet passage area and fall down. The falling impurities are blown to the ash discharge port by the fan below the electrode sheet passage area and are discharged by the rotation of the connecting roller and the side plate. The impurities removed by the lower scraper fall directly to the ash discharge port and are discharged by the rotation of the connecting roller and the side plate.

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