Lithium battery pole piece rolling device and working method

Abstract

The invention relates to a lithium battery pole piece rolling device and working method.The lithium battery pole piece rolling device comprises a shell, a feeding port is formed in one side of the shell, a discharging port is formed in the other side of the shell, a cleaning mechanism and a rolling mechanism are sequentially arranged in the shell in the moving direction of a pole piece, the cleaning mechanism comprises an upper scraper and a lower scraper, and a pole piece penetrating area is formed between the upper scraper and the lower scraper; the two ends of the upper scraping plate and the two ends of the lower scraping plate are connected with the inner side face of the shell in a sealed mode, a dust falling opening is formed in the position, corresponding to the lower portion of the lower scraping plate, of the bottom shell wall of the shell, a connecting roller is arranged above the dust falling opening, a plurality of side plates are arranged on the roller face of the connecting roller in the circumferential direction, the connecting roller is connected with a rotation driving piece fixed to the shell, and fans are arranged on the two sides of the shell. The fans are located in front of the upper scraping plate and the lower scraping plate, the fan on one side is located above the pole piece penetrating area, the fan on the other side is located below the pole piece penetrating area, the rolling device does not need to be shut down when cleaning the collecting device, and the production schedule is not affected.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery pole pieces, and in particular to a lithium battery pole piece rolling device and a working method. Background Art

[0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] In the lithium-ion battery manufacturing process, pole sheet rolling is a key process step that has a crucial impact on the battery's final performance. The main purpose of pole sheet rolling is to increase the compaction density of the pole sheet material through the action of mechanical force, thereby improving the battery's discharge capacity, reducing internal resistance, and enhancing the battery's cycle stability and safety. However, the existing rolling equipment can only clean the pressing rollers, but cannot clean the impurities on the pole pieces. It is inevitable that certain impurities will remain on the pole pieces during the production process. If they are directly rolled, defects will easily occur in the pole pieces after rolling, and secondary rework will be required later. At present, there is a new type of ternary lithium-ion power battery pole piece rolling equipment for new energy vehicles, which has a cleaning mechanism and can clean the surface of the pole pieces during operation. However, in the above-mentioned rolling equipment, the pressing rollers and the cleaning mechanism are exposed to the external environment. External dust can easily fall onto the pressing rollers, causing damage to the pole pieces during rolling. If it is set inside a closed shell, the dust cleaned by its cleaning mechanism is collected in a collection box inside the shell. When the collection box needs to be cleaned, since the collection box is inside the shell, it is necessary to stop the machine, open the shell, and clean the collection box. The operation is complicated and affects the production progress. In addition, when cleaning pole pieces of different thicknesses, the cleaning mechanism needs to be provided with complex structures such as springs, sliders, and slides to meet the cleaning needs of pole pieces of different thicknesses, which increases the complexity of the device and has high processing and manufacturing costs. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a lithium battery pole piece rolling device and a working method, which overcome the defects of the current rolling device with pole piece cleaning function.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions: In the first aspect, an embodiment of the present invention provides a lithium battery pole piece rolling device, comprising a shell, a feed port on one side of the shell, a discharge port on the other side, and a cleaning mechanism and a rolling mechanism are sequentially arranged in the shell along the movement direction of the pole piece. The cleaning mechanism comprises an upper scraper and a lower scraper, and a pole piece passing area is between the upper scraper and the lower scraper. The two ends of the upper scraper and the lower scraper are sealed with the inner side surface of the shell, and an ash drop port is provided on the bottom shell wall corresponding to the lower side of the lower scraper. A connecting roller is provided above the ash drop port, and a plurality of side plates are provided on the roller surface of the connecting roller along the circumferential direction. The connecting roller is connected to a rotating drive member fixed to the shell, and fans are provided on both sides of the shell. The fans are located in front of the upper scraper and the lower scraper. The fan on one side is located above the pole piece passing area, and the fan on the other side is located below the pole piece passing area.

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

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

[0008] Optionally, the third scraper portion is provided with a drop opening.

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

[0010] Optionally, the rolling mechanism includes an upper pressing roller group and a lower pressing roller group arranged relatively to each other, and a pole piece passing area is between the upper pressing roller group and the lower pressing roller group. The upper pressing roller group is connected to the upper pressing roller bracket, and the lower pressing roller group is connected to the lower pressing roller bracket. The upper pressing roller bracket is connected to a lifting drive member fixed on the top of the shell, and the lower pressing roller bracket is fixedly connected to the shell.

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

[0012] Optionally, the upper pressing roller assembly includes a plurality of upper pressing rollers distributed along the pole piece conveying direction, wherein one of the upper pressing rollers is connected to a first rotating driving member fixed to the upper pressing roller bracket and serves as an active upper pressing roller; The lower pressure roller assembly includes multiple lower pressure rollers distributed along the pole piece 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 the second rotating drive member fixed to the lower pressure roller bracket.

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

[0014] In the second aspect, an embodiment of the present invention provides a working method of the lithium battery pole piece rolling device described in the first aspect, wherein the rolling mechanism rolls the battery pole piece entering the shell from the feed port and drives the battery pole piece to be sent out from the discharge port. During the movement of the battery pole piece, the upper scraper scrapes off impurities on the upper surface of the pole piece, and the lower scraper scrapes off impurities on the lower surface of the pole piece. The impurities scraped off by the upper scraper are blown to one side of the pole piece and fall down under the action of the fan above the pole piece crossing area. The fallen impurities are blown to the ash drop port under the action of the fan below the pole piece crossing area and are sent out under the rotation of the connecting roller and the side plate. The impurities on the lower surface of the pole piece scraped off by the lower scraper directly fall to the ash drop port and are sent out under the rotation of the connecting roller and the side plate.

[0015] The beneficial effects of the present invention are as follows: 1. The lithium battery pole piece rolling device of the present invention has a rolling mechanism located inside a shell, which prevents dust from the external environment from falling onto the pressing rollers of the rolling mechanism. An upper scraper and a lower scraper are provided to scrape off impurities on the upper and lower surfaces of the battery pole pieces. A fan is provided. Impurities scraped off by the upper scraper can be sent to the dust outlet by the fan and sent out under the rotation of the connecting roller and the side plate. Impurities scraped off by the lower scraper can directly fall to the dust outlet and be sent out 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 outlet and collected by a collecting device. When cleaning the collecting device, there is no need to disassemble the shell of the rolling device, the operation is convenient, and the machine can be operated without stopping, thus avoiding affecting the production progress. 2. The lithium battery pole piece rolling device of the present invention has an upper scraper connected to the upper pressure roller bracket, and a lower scraper connected to the lower pressure roller bracket. For battery pole pieces of different thicknesses, the upper scraper and the lower scraper can be adjusted synchronously while adjusting the rolling mechanism. The scraper is directly connected to the pressure roller bracket to achieve adjustment, eliminating complex adjustment structures such as springs, sliders, and slide grooves. The structure is simpler and the equipment processing and manufacturing cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention. DETAILED DESCRIPTION

[0017] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the present invention Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of Example 1 of the present invention Figure 2 ; Figure 3 This is a schematic diagram of the overall structure of Example 1 of the present invention Figure 3 ; Figure 4 This is an exploded schematic diagram of the overall structure of Example 1 of the present invention; Figure 5 This is a schematic diagram of the structure of the roller pressing mechanism of Example 1 of the present invention Figure 1 ; Figure 6 This is a schematic diagram of the structure of the roller pressing mechanism of Example 1 of the present invention Figure 2 ; Figure 7 Schematic diagram of the upper scraper and the lower scraper of Example 1 of the present invention; Figure 8 This is a schematic diagram of the assembly of the connecting roller and the side plate of Example 1 of the present invention; Among them, 1. Shell, 2. Feed port, 3. Discharge port, 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 member, 12. Second rotating drive member, 13. First plate portion, 14. Second plate portion, 15. Third plate portion, 16. Fourth plate portion, 17. Ash drop port, 18. Connecting roller, 19. Side plate, 20. Third rotating drive member, 21. First fan, 22. Connecting ring, 23. Filter screen, 24. Drop port, 25. Baffle. For the convenience of description, if the words "upper" and "lower" appear in the present invention, they only indicate that they are consistent with the upper and lower directions of the drawings themselves, and do not limit the structure. 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 component referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0018] Example 1 This embodiment provides a lithium battery pole piece rolling device, such as Figures 1-4 As shown, it includes a shell 1. In this embodiment, the shell 1 adopts a rectangular structure. In other embodiments, the shell may also adopt a cube or cylindrical structure. Those skilled in the art can set it according to actual needs. One side shell wall of the shell is provided with a feed port 2, and the other side shell wall is provided with a discharge port 3. A flexible diaphragm 4 is provided at the feed port 2. Preferably, the flexible diaphragm 4 at the feed port 2 adopts a rubber diaphragm, and a flexible diaphragm is provided at the discharge port 3. Preferably, the flexible diaphragm at the discharge port adopts a rubber diaphragm. Cutting seams are provided on the flexible diaphragms of the feed port 2 and the discharge port 3. The battery pole piece can pass through the flexible diaphragm through the cutting seam. Through the flexible diaphragm, the shell 1 forms a closed cavity, and dust in the external environment will not enter the internal space of the shell through the feed port and the discharge port.

[0019] A cleaning mechanism and a rolling mechanism are sequentially arranged inside the shell 1 along the movement direction of the battery pole sheet. The rolling mechanism is used to roll the battery pole sheet. The cleaning mechanism is used to clean the upper and lower surfaces of the battery pole sheet before rolling, and remove dust and impurities on the upper and lower surfaces of the battery pole sheet to prevent dust and impurities from damaging the battery pole sheet when the battery pole sheet is rolled.

[0020] like Figure 5-Figure 6 As shown, the rolling mechanism includes an upper pressing roller group and a lower pressing roller group, and there is a space between the upper pressing roller group and the lower pressing roller group for the battery pole sheet to pass through. The upper pressing roller group and the lower pressing roller group jointly roll the battery pole sheet.

[0021] The upper pressing roller group is installed on the upper pressing roller bracket, including multiple upper pressing rollers 5 distributed along the transmission direction of the battery electrode sheet. The upper pressing roller bracket includes a connecting frame 6 and a top frame 7. The two ends of the multiple upper pressing rollers 5 are rotatably connected to the connecting frame 6, and the upper pressing rollers 5 can rotate around their own axes. The connecting frame 4 is fixedly connected to the bottom end of the top frame 7, and the top frame 7 is connected to multiple lifting drive components, which are fixed to the top shell wall of the shell 1.

[0022] In this embodiment, a lifting drive member is connected to each of the four corners of the top frame 7. In this embodiment, the lifting drive member adopts an electric telescopic rod 8 with a vertical axis. The fixed part of the electric telescopic rod 8 is connected to the top shell wall of the shell 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 the multiple upper pressure rollers 5 to rise and fall, and applying roller pressure to battery electrodes of different thicknesses.

[0023] The lower pressure roller group is installed on the lower pressure roller bracket, including 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 axes. The base frame 10 serves as a lower pressure roller bracket and is fixedly connected to the shell wall of the shell 1.

[0024] At least one upper pressing roller 5 is connected to the first rotating driving member. The first rotating driving member 11 is fixed on the connecting frame 6. The first rotating driving member 11 can drive the upper pressing roller 5 to rotate. The upper pressing roller 5 serves as an active upper pressing roller.

[0025] The lower pressing roller directly below the active upper pressing roller serves as the active lower pressing roller, which is connected to the second rotating driving member 12 fixed to the base frame 10. The second rotating driving member 12 can drive the active lower pressing roller to rotate around its own axis.

[0026] In this embodiment, along the conveying direction of the battery electrode sheet, the upper pressing roller 5 located at the front end serves as the active upper pressing roller, and the lower pressing roller 9 located at the front end serves as the active lower pressing roller.

[0027] The first rotating driving member 11 adopts 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 rotating driving member 12 adopts a second motor, which is fixed on the base frame 10, and its output shaft is connected to the active lower pressure roller.

[0028] The active upper pressing roller and the active lower pressing roller can rotate around their own axes driven by the first motor and the second motor, and can use friction to provide power for the battery pole pieces to move while rolling the battery pole pieces.

[0029] 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 on the upper surface of the battery electrode. The lower scraper is used to contact the lower surface of the battery electrode to scrape off dust and impurities on the lower surface of the battery electrode.

[0030] 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 bottom frame 10. When cleaning battery electrodes of different thicknesses, the upper scraper and the lower scraper only need to be adjusted synchronously with the rolling mechanism. There is no need to set up a special adjustment mechanism for the upper scraper and the lower scraper, which simplifies the complexity of the equipment and reduces manufacturing and processing costs.

[0031] In this embodiment, the two ends of the upper scraper and the lower scraper are sealed with the inner side surface of the shell 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, and the upper scraper is sealed and slidably connected to the inner side surface of the shell.

[0032] The upper scraper includes a first plate portion 13 and a second plate portion 14 set at a set obtuse angle. The first plate portion 13 is set parallel to the conveying direction of the battery electrode, and the second plate portion 14 is set downwardly inclined. 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.

[0033] The lower scraper includes a third plate portion 15 and a fourth plate portion 16 which are 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 arranged inclined upward, and 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.

[0034] A space for the battery pole pieces to pass through is formed between the upper scraper and the lower scraper.

[0035] Furthermore, the ends of the second plate portion 14 and the fourth plate portion 16 that are in contact with the battery pole pieces are provided with flexible scrapers made of rubber material, and the flexible scrapers are in contact with the surface of the battery pole piece to prevent friction damage to the surface of the battery pole piece.

[0036] In this embodiment, the rest of the battery electrode in the shell is defined as the electrode passing area, the space between the upper scraper and the lower scraper belongs to the electrode passing area, and the space between the upper pressing roller 5 and the lower pressing roller 9 belongs to the electrode passing area.

[0037] The bottom shell wall of the shell corresponding to the lower scraper is provided with an ash drop port 17, and a connecting roller 18 is provided above the ash drop port 17. The connecting roller 18 is rotatably connected to the shell wall of the shell 1. Figure 8 As shown, a plurality of side plates 19 are arranged at equal intervals along the circumferential direction on the roller surface of the connecting roller 18. When the connecting roller 18 rotates, the side plates 19 can be driven to rotate, and the side plates 19 can extend into the ash dropout port 17. The connecting roller 18 is connected to a third rotating drive member 20 fixed to the shell wall of the shell 1. The third rotating drive member 20 adopts a third motor. The output shaft of the third motor is connected to the connecting roller 18, and can drive the connecting roller 18 to rotate around its own axis.

[0038] In the shell, of the two shell walls perpendicular to the two shell walls where the feed port 2 and the discharge port 3 are set, one shell wall is provided with a first fan 21, and the other shell wall is provided with a second fan. Along the conveying direction of the battery pole pieces, the first fan 21 and the second fan are set in front of the upper scraper and the lower scraper, wherein the position of the first fan 21 is above the pole piece passing area, and the position of the second fan is below the pole piece passing area. The wind directions generated by the first fan 21 and the second fan are both toward the inner side of the shell.

[0039] For the first fan 21, an opening is provided on the shell wall of the shell in which the first fan is installed, and the first fan is installed inside the opening. A connecting ring 22 is provided on the shell wall of the shell along the edge of the opening. The connecting ring 22 is fixed on the outer surface of the shell wall of the shell 1. The connecting ring 22 is detachably fixed to the filter screen 23 by a plurality of bolts evenly spaced along the circumferential direction.

[0040] In another embodiment, the connecting ring 22 is provided with an annular slot, and the edge of the filter screen 23 is provided with an annular plug plate matching the annular slot. The filter screen 23 is plug-connected to the connecting ring 22 through the annular slot and the annular plug plate.

[0041] The filter 23 is arranged outside the first fan 21 to prevent dust and impurities in the external environment from entering the interior of the housing.

[0042] For the second fan, an opening is provided on the shell wall of the shell in which the second fan is installed, and the second fan is installed inside the opening. The outer side surface of the shell wall of the shell 1 is provided with a connecting ring distributed along the opening, and the connecting ring is fixedly connected to the outer side surface of the shell wall. The connecting ring is detachably fixedly connected to the filter 23. The filter 23 is located on the outside of the second fan to prevent the second fan from introducing dust and impurities in the external environment into the shell. The connection method between the filter on the outside of the second fan and the connecting ring is the same as the connection method between the filter 23 and the connecting ring 22 on the outside of the first fan, and will not be repeated here.

[0043] In this embodiment, the first fan 21 can blow the dust and impurities scraped off the upper surface of the battery electrode by the upper scraper, and blow the dust and impurities toward the shell wall where the second fan is installed, so as to separate the dust and impurities from the battery electrode. Under the action of gravity, the dust and impurities will fall to the corresponding position of the second fan. Under the action of the second fan, the dust and impurities will be blown to the space between the two adjacent side plates 19 on the connecting roller 18. The connecting roller 18 drives the side plate 19 to rotate, and the dust and impurities are discharged through the dust outlet 17.

[0044] The lower scraper scrapes the dust and impurities from the lower surface of the battery electrode and drops them directly to between two adjacent side plates on the connecting roller 18 under the action of gravity. The connecting roller 18 drives the side plates 19 to rotate, and the side plates 19 are used to discharge the dust and impurities through the dust outlet 17.

[0045] In this embodiment, the dust outlet 17 is directly connected to the collection device through a pipe. The collection device can be a collection box. The discharged dust and impurities can directly enter the collection box through the pipe for collection.

[0046] When cleaning the collection box, there is no need to disassemble the housing 1 of the roller pressing device, and the collection box can be cleaned directly. The operation is convenient and can be carried out without stopping the machine, thus avoiding affecting the production progress.

[0047] Furthermore, when the dust on the surface of the electrode is blown away by the wind and the battery electrode falls, 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 dust from accumulating on the lower scraper, the third plate portion 15 of the lower scraper is provided with a drop opening 24. The dust and impurities falling on the third plate portion 15 can fall through the drop opening 24 and then enter between the two adjacent side plates 19 on the connecting roller 18.

[0048] Furthermore, the fourth plate portion 16 is arranged on one side of the blanking port 24, and a baffle 25 is provided on the other side of the blanking port. The baffle 25 can block dust and impurities from moving toward the lower pressure roller 9, preventing dust and impurities from adhering to the lower pressure roller 9. In this embodiment, the baffle 25 is arranged at an angle, and dust and impurities that fall onto the baffle 25 can slide to the blanking port 24 and be discharged through the blanking port 24.

[0049] In this embodiment, when impurities and dust pass through the gap between the upper scraper and the lower scraper and enter the space between the lower scraper and the upper scraper, most of the dust and impurities can fall to the third plate portion 15 under the action of gravity and will not fall to the upper surface of the pole piece. Therefore, in this embodiment, only the cleaning of this part of the dust is considered, and the dust and impurities that fall back to the upper surface of the pole piece do not exist or are very small and can be ignored.

[0050] Example 2 This embodiment provides a working method of the lithium battery pole piece rolling device described in Example 1: The battery electrode enters the shell 1 through the cut slit of the flexible diaphragm 4 at the feed port 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 from the cut slit of the flexible diaphragm at the discharge port 3.

[0051] The active upper pressing roller and the active lower pressing roller are driven by the first motor and the second motor to rotate, driving the battery pole piece to move forward.

[0052] As the battery pole piece moves forward, the upper scraper scrapes off dust and impurities on the upper surface of the battery pole piece, and the lower scraper scrapes off dust and impurities on the lower surface of the battery pole piece.

[0053] The dust and impurities scraped off the upper surface of the battery electrode move toward the shell wall where the second fan is installed under the action of the first fan 21. After separating from the battery electrode, they fall under the action of gravity. When they fall to the position of the second fan, they are blown into the space between the 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 are used to discharge the impurities and dust through the dust outlet 17.

[0054] The 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 rollers 18 drive the side plates 19 to rotate and discharge the impurities and dust through the dust outlet 17.

[0055] The rolling device and working method of this embodiment can remove impurities and dust from the upper and lower surfaces of the battery pole pieces, ensuring the surface quality of the pole pieces. The removed dust and impurities are discharged to the outside of the shell for collection. When cleaning the collection device, there is no need to stop the machine, avoiding affecting the production progress.

[0056] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A lithium battery pole piece rolling device, characterized in that: It includes a shell, with a feed port on one side of the shell and a discharge port on the other side. Along the movement direction of the pole piece, a cleaning mechanism and a rolling mechanism are sequentially arranged in the shell. The cleaning mechanism includes an upper scraper and a lower scraper. The pole piece passing area is between the upper scraper and the lower scraper. The two ends of the upper scraper and the lower scraper are sealed with the inner side of the shell. An ash dropping port is provided on the bottom shell wall corresponding to the lower side of the lower scraper. A connecting roller is provided above the ash dropping 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 member fixed to the shell. Fans are provided on both sides of the shell. The fans are located in front of the upper scraper and the lower scraper. The fan on one side is located above the pole piece passing area, and the fan on the other side is located below the pole piece passing area.

2. A lithium battery pole piece rolling device according to claim 1, characterized in that: The upper scraper includes a first scraper portion and a second scraper portion arranged at a set obtuse angle. The first scraper portion is arranged parallel to the conveying direction of the pole piece. One end of the second scraper portion is integrally connected to the first scraper portion, and the other end is used to contact the pole piece.

3. A lithium battery pole piece rolling device according to claim 2, characterized in that: The lower scraper includes a third scraper portion and a fourth scraper portion arranged at an obtuse angle. The third scraper portion is arranged parallel to the conveying direction of the pole piece. One end of the fourth scraper portion is integrally connected to the third scraper portion, and the other end is used to contact the pole piece.

4. A lithium battery pole piece rolling device according to claim 3, characterized in that: The third scraper portion is provided with a material drop opening.

5. A lithium battery pole piece rolling device according to claim 4, characterized in that: A fourth plate portion is provided on one side of the blanking port, and a baffle fixed on the third plate portion is provided on the other side.

6. The lithium battery pole piece rolling device according to claim 1, characterized in that: The rolling mechanism includes an upper pressing roller group and a lower pressing roller group arranged opposite to each other, and a pole piece passing area is between the upper pressing roller group and the lower pressing roller group. The upper pressing roller group is connected to the upper pressing roller bracket, and the lower pressing roller group is connected to the lower pressing roller bracket. The upper pressing roller bracket is connected to the lifting drive member fixed on the top of the shell, and the lower pressing roller bracket is fixedly connected to the shell.

7. A lithium battery pole piece rolling device according to claim 6, 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 scraper and the lower scraper and the inner side surface of the shell.

8. The lithium battery pole piece rolling device according to claim 6, characterized in that: The upper pressing roller assembly includes a plurality of upper pressing rollers distributed along the pole piece conveying direction, wherein one of the upper pressing rollers is connected to a first rotating driving member fixed to the upper pressing roller bracket and serves as an active upper pressing roller; The lower pressure roller assembly includes multiple lower pressure rollers distributed along the pole piece 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 the second rotating drive member fixed to the lower pressure roller bracket.

9. The lithium battery pole piece rolling device according to claim 1, characterized in that: A filter is provided on the outside of the fan.

10. A method for operating the lithium battery pole piece rolling device according to any one of claims 1 to 9, characterized in that: The rolling mechanism rolls the battery electrodes entering the shell from the feed port and drives the battery electrodes to be sent out from the discharge port. During the movement of the battery electrodes, the upper scraper scrapes off impurities on the upper surface of the electrodes, and the lower scraper scrapes off impurities on the lower surface of the electrodes. The impurities scraped off by the upper scraper are blown to one side of the electrodes and fall down under the action of the fan above the electrode crossing area. The fallen impurities are blown to the ash drop port under the action of the fan below the electrode crossing area and are sent out under the rotation of the connecting roller and the side plate. The impurities on the lower surface of the electrodes scraped off by the lower scraper fall directly to the ash drop port and are sent out under the rotation of the connecting roller and the side plate.

Images