Battery pole piece rolling device and method of use thereof

Abstract

The application relates to the technical field of lithium battery production, in particular to a battery pole piece rolling device and a use method thereof. The device comprises a rack, a compacting assembly arranged on the rack and used for compacting black powder particles coated on an aluminum foil, the compacting assembly comprises a first compacting roller and a second compacting roller rotationally connected to the rack, the first compacting roller is arranged in a spaced mode with the second compacting roller, and a blowing assembly is arranged on the rack and used for blowing air to the surface of the first compacting roller; the blowing assembly comprises a blowing plate arranged on the compacting assembly, a blowing box body arranged on the rack and a first blowing port arranged on the blowing plate, the inner side surface of the blowing plate and the surface of the first compacting roller form an arc-shaped air inlet channel, the air inlet channel is communicated with the blowing box body, and the inner wall of the blowing box body is provided with an arc-shaped surface. The application has the effect of reducing the surface wear of the first compacting roller.

Description

Technical Field

[0001] This application relates to the technical field of lithium battery production, and in particular to a battery electrode rolling device and its usage method. Background Technology

[0002] Battery electrodes are key components of lithium-ion batteries, directly determining the battery's energy density, cycle life, and safety performance. Their production technology deeply integrates materials science, electrochemical principles, and precision manufacturing processes. It requires the precise proportioning of active materials (such as positive and negative electrode materials), conductive agents, and binders to form a uniform and stable slurry system, which is then processed through coating, rolling, and slitting to create a composite structure with specific porosity and areal density.

[0003] For example, Chinese patent document CN220233233U discloses a battery electrode rolling device, including a frame; a first roller rotatably connected to the frame; a second roller rotatably connected to the frame; the axles of the second roller and the first roller are arranged parallel to each other, and there is a material passage gap between the second roller and the first roller. The first roller and the second roller are configured to roll the battery electrode when the battery electrode passes through the material passage gap; a heating power supply, the positive and negative terminals of which are electrically connected to both ends of the battery electrode in the extension direction, and the heating power supply is configured to energize and heat the battery electrode after startup; utilizing the electrical and physical properties of the conductive substrate of the battery electrode, it is directly energized to heat it, and the active material coated on the surface of the conductive substrate is heated through heat transfer. After heating, the ductility of the conductive substrate and the active material is enhanced, and the processability is improved.

[0004] In the aforementioned related technologies, a material passage gap is provided between the second roller and the first roller. The coated electrode sheet passes through the material passage gap between the second roller and the first roller, and the coated electrode sheet is pressed through the material passage gap. During the pressing process of the coated electrode sheet, the black powder particles coated on the aluminum foil will come into direct contact with the second roller and the first roller. During the pressing process, the black powder particles will stick to the surface of the second roller and the first roller. At this time, a scraper needs to be set on the frame. The scraper abuts against the surface of the second roller and the first roller. During the rotation of the second roller and the first roller, the scraper cleans the black powder particles attached to the surface of the second roller and the first roller. However, when cleaning the black powder particles on the surface of the second roller and the first roller, the contact between the scraper and the surface of the second roller and the first roller will cause wear on the surface of the second roller and the first roller, affecting the service life of the second roller and the first roller. Summary of the Invention

[0005] This application provides a battery electrode rolling device and its usage method, aiming to solve the problem of wear between the second roller, the first roller, and the scraper in related technologies.

[0006] First aspect:

[0007] The battery electrode rolling device provided in this application adopts the following technical solution:

[0008] A battery electrode rolling device includes a frame, on which a pressing assembly is provided for compacting black powder particles coated on aluminum foil. The pressing assembly includes a first pressing roller and a second pressing roller rotatably connected to the frame, the first pressing roller and the second pressing roller being spaced apart. The frame is provided with an air blowing assembly for blowing air onto the surface of the first pressing roller. Scraping assemblies are provided at corresponding positions on the first pressing roller and the second pressing roller on the frame. The air blowing assembly includes an air blowing plate provided on the scraping assembly, an air blowing box provided on the frame, and a first air blowing port provided on the air blowing plate. The inner side of the air blowing plate forms an arc-shaped air inlet channel with the surface of the first pressing roller. The air inlet channel communicates with the air blowing box. The inner wall of the air blowing box is provided with an arc-shaped surface, which is tangent to the surface of the first pressing roller. The air inlet channel is also tangent to the surface of the first pressing roller.

[0009] By adopting the above technical solution, air is introduced into the first air inlet, and the gas in the first air inlet enters the arc-shaped air intake channel. The gas in the air intake channel flows along the arc surface. Since the arc surface is tangent to the surface of the first pressing roller, the air intake channel is also tangent to the surface of the first pressing roller. At the same time, the air intake channel is connected to the inside of the air blowing box. When the gas in the first air inlet enters the air intake box through the air intake channel, the gas blows the black powder particles attached to the surface of the first pressing roller off, thus achieving the purpose of cleaning the surface of the first pressing roller. The second pressing roller is also cleaned by blowing gas. This can reduce the wear of the first and second pressing rollers and improve their service life. The black powder particles blown by the gas will fall to the bottom of the air blowing box under the action of gravity, which makes it easy to recycle and reuse the cleaned black powder particles, thus saving resources.

[0010] Optionally, the scraping assembly is used to scrape off black powder particles adhering to the surfaces of the first and second pressing rollers; the scraping assembly includes a mounting bracket fixed on the frame, a mounting shaft fixed on the mounting bracket, and a scraper fixed on the mounting bracket, the mounting shaft being rotatably connected to the frame, and the end of the scraper away from the mounting shaft being spaced apart from the first pressing roller.

[0011] By adopting the above technical solution, the scraper and the surface of the first pressing roller are spaced apart. Then, the gas in the air inlet channel passes through the gap between the first pressing roller and the scraper. Since the cross-section at the connection between the air inlet channel and the air inlet box is smaller, the gas pressure entering the air blowing box will increase when the gas passes through the gap between the first pressing roller and the scraper. The impact force on the surface of the first pressing roller will also increase accordingly, thus improving the cleaning effect of black powder particles attached to the surface of the first pressing roller. Due to the gap between the first pressing roller and the scraper, when the gas blown towards the first pressing roller cannot clean the large black powder particles attached to the surface of the first pressing roller, the scraper will scrape off the large black powder particles from the surface of the first pressing roller when the large black powder particles pass by. The cleaned black powder particles will also fall to the bottom of the air blowing box under the action of gravity, which facilitates the collection and recycling of the cleaned black powder particles.

[0012] Optionally, a first partition plate is provided inside the air blowing box. The first partition plate is arranged parallel to the inclined surface, and an inclined discharge channel is formed between the first partition plate and the inclined surface. A discharge pipe is fixedly installed on the bottom wall of the air blowing box. A first inlet is opened on the discharge pipe. One end of the discharge pipe is provided with an opening. The first inlet is connected to one end of the discharge channel, and the inlet channel is set at an angle to the axis of the discharge pipe.

[0013] By adopting the above technical solution, a portion of the gas flowing along the arc-shaped surface and the cleaned black powder particles will enter the discharge channel, and then enter the discharge pipe through the discharge channel and the first inlet. As gas is continuously introduced into the blowing box, a portion of the gas and black powder particles will be discharged from the opening of the discharge pipe, thus facilitating the cleaning of black powder particles in the blowing box. In addition, since the feed channel and the discharge pipe axis are set at an angle, the accumulation of black powder particles at the connection between the feed channel and the first inlet can be reduced.

[0014] Optionally, a second inlet is provided on the discharge pipe, and a blocking block is provided inside the air blowing box. The blocking block is fixed on the inclined first partition plate, and a connecting hole is provided on the blocking block. The connecting hole is inclined and communicates with the second inlet.

[0015] By adopting the above technical solution, a portion of the gas flowing along the arc surface and the cleaned black powder particles will enter the discharge channel, while another portion will enter the discharge pipe through the connecting hole and the second feed inlet. This can improve the cleaning effect of black powder particles in the blowing box. In addition, due to the inclined setting of the connecting hole, the accumulation of black powder particles at the connection between the connecting hole and the second feed inlet can be reduced.

[0016] Optionally, a torsion spring is fitted on the mounting shaft, with one end of the torsion spring fixed to the mounting shaft and the other end fixed to the mounting bracket. The torsion spring keeps the scraper horizontal. A pushing component is provided on the mounting bracket to push the mounting shaft to rotate, thereby causing the mounting shaft to drive the scraper to rotate.

[0017] By adopting the above technical solution, the torsion spring keeps the scraper in a horizontal state, and the scraper angle can be adjusted by pushing the component. Then, when the surface of the first pressing roller cannot be completely cleaned, the scraper position can be adjusted by pushing the component so that the end face of the scraper abuts against the first pressing roller, which can better clean the surface of the first pressing roller.

[0018] Optionally, the pushing assembly includes a pushing plate fixed on the mounting shaft and a pushing screw threaded onto the mounting bracket. The pushing plate is provided with a pushing inclined surface, and the end of the pushing screw abuts against the pushing inclined surface.

[0019] By adopting the above technical solution, when it is necessary to adjust the scraper angle, simply rotate the push screw. The movement of the push screw will drive the mounting shaft to rotate, and the rotation of the mounting shaft will drive the scraper to rotate, thereby achieving the purpose of adjusting the scraper position.

[0020] Optionally, the end of the push screw near the push inclined surface is provided with an arc surface, which abuts against the push inclined surface.

[0021] By adopting the above technical solution, since the position where the push screw abuts against the push inclined surface is set to an arc shape, the friction between the push screw and the push inclined surface can be reduced during the process of the push screw pushing the push plate to rotate.

[0022] Optionally, a scraping component and an air blowing component are also provided at the corresponding position of the second pressing roller on the frame.

[0023] Optionally, the air blowing plate is provided with a heating air duct, which is used to heat the surface of the first pressing roller, and the heating air duct is arranged towards the surface of the first pressing roller.

[0024] The second aspect:

[0025] A method of using a battery electrode rolling device includes the following steps:

[0026] S1: Adjust the scraper angle by pushing the component so that the scraper tip is spaced apart from the surface of the first pressure roller;

[0027] S2: Air is blown into the air intake channel through the first air inlet, and the gas enters the air blowing box along the arc surface of the air intake channel;

[0028] S3: The gas entering the blowing box blows off the black powder particles attached to the surface of the first pressing roller and into the discharge channel, and then into the discharge pipe.

[0029] By adopting the above technical solution, when the battery electrode is pressed, multiple first and second pressing rollers rotate. During the rotation of the first and second pressing rollers, the black powder particles on the surface of the battery electrode are pressed. During the pressing process, some black powder particles will adhere to the surfaces of the first and second pressing rollers. At this time, a scraper can clean the large black powder particles adhering to the surfaces of the first and second pressing rollers. The black powder particles that the scraper cannot reach can be cleaned by the gas impact in the air inlet channel. During the cleaning process, some gas will enter the discharge channel through the arc surface and then enter the discharge pipe. Some gas and black powder particles will enter the discharge pipe through the connecting hole and then be discharged through the discharge pipe. During the entire cleaning process, the scraper does not need to press against the surface of the first pressing roller, which can reduce the wear of the surface of the first pressing roller and improve the service life of the first pressing roller.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] 1. When the gas in the first air inlet enters the air inlet box through the air inlet channel, the gas will blow the black powder particles attached to the surface of the first pressing roller off, thereby cleaning the surface of the first pressing roller, reducing the wear of the first pressing roller, and improving the service life of the first pressing roller.

[0032] 2. When passing through the gap between the first pressing roller and the scraper, the gas pressure entering the air blowing box will increase, and the impact force on the surface of the first pressing roller will also increase accordingly, thus achieving a better cleaning effect on the black powder particles attached to the surface of the first pressing roller.

[0033] 3. Some of the gas flowing along the arc-shaped surface and the cleaned black powder particles will enter the discharge channel, and then enter the discharge pipe through the discharge channel and the first inlet. As gas is continuously introduced into the blowing box, some gas and black powder particles will be discharged from the opening of the discharge pipe, thus facilitating the cleaning of black powder particles in the blowing box. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0035] Figure 2 This is a top view of the overall structure of an embodiment of this application.

[0036] Figure 3 This is a schematic diagram of the structure of the first pressing roller and air blowing assembly in an embodiment of this application.

[0037] Figure 4 This is a front view of the first pressure roller according to an embodiment of this application.

[0038] Figure 5 This is a cross-sectional view of the first pressure roller according to an embodiment of this application.

[0039] Figure 6 yes Figure 5 Enlarged view of point A in the middle.

[0040] Figure 7 yes Figure 5 Enlarged view of point B in the middle.

[0041] Figure 8 This is a schematic diagram of the sealing block and connecting hole structure according to an embodiment of this application.

[0042] Reference numerals: 1. Frame; 11. Feeding roller; 12. Rewinding roller; 13. Heating air duct; 14. Air inlet channel; 15. Discharge channel; 2. Pressing assembly; 21. First pressing roller; 22. Second pressing roller; 3. Scraping assembly; 31. Mounting bracket; 32. Mounting shaft; 33. Scraper; 4. Pushing assembly; 41. Pushing plate; 42. Pushing screw; 43. Pushing inclined surface; 5. Air blowing assembly; 51. Air blowing plate; 52. Air blowing box; 53. First air blowing port; 6. Arc-shaped surface; 61. Discharge pipe; 64. Sealing block; 65. First partition plate; 66. Connecting hole. Detailed Implementation

[0043] The following combination Figures 1-8 This application will be described in further detail.

[0044] First aspect:

[0045] This application discloses a battery electrode rolling device. (Refer to...) Figures 1 to 3 A battery electrode rolling device includes a frame 1 and a plurality of pressing components 2 disposed on the frame 1. The pressing components 2 are used to compact the black powder particles coated on the aluminum foil. The plurality of pressing components 2 are arranged at intervals along the length of the frame 1. A feeding roller 11 and a winding roller 12 are disposed on the frame 1. The feeding roller 11 is used to unwind the uncompacted battery electrode sheets, and the winding roller 12 is used to wind up the compacted battery electrode sheets. The battery electrode sheets are composed of aluminum foil and black powder particles coated on the aluminum foil.

[0046] Reference Figures 1 to 3The pressing assembly 2 includes a first pressing roller 21 and a second pressing roller 22 rotatably connected to the frame 1. The first pressing roller 21 and the second pressing roller 22 are spaced apart. The battery electrode sheet to be pressed passes through the pressing gap between the first pressing roller 21 and the second pressing roller 22. In this embodiment, the pressing gap between the first pressing roller 21 and the second pressing roller 22 gradually decreases from the feeding roller 11 to the winding roller 12, which can gradually compact the black powder particles on the aluminum foil and make the pressing effect of the battery electrode sheet better.

[0047] Reference Figures 1 to 3 Scraping components 3 are provided at the corresponding positions of the first pressing roller 21 and the second pressing roller 22 on the frame 1. The scraping components 3 are used to scrape off the black powder particles attached to the surface of the first pressing roller 21 and the second pressing roller 22. Since the scraping components 3 corresponding to the first pressing roller 21 and the second pressing roller 22 have the same structure, in this application, only the scraping components 3 corresponding to the first pressing roller 21 are described in detail, and the specific structure of the scraping components 3 corresponding to the second pressing roller 22 will not be described in detail.

[0048] Reference Figures 3 to 6 The scraping assembly 3 includes a mounting bracket 31 fixed on the frame 1, a mounting shaft 32 fixed on the mounting bracket 31, and a scraper 33 fixed on the mounting bracket 31. The mounting shaft 32 is rotatably connected to the frame 1. The end of the scraper 33 away from the mounting shaft 32 is spaced apart from the first pressing roller 21. At the same time, an air blowing assembly 5 is provided on the frame 1. The air blowing assembly 5 blows air into the gap between the scraper 33 and the first pressing roller 21 to facilitate blowing away the black powder particles attached to the surface of the first pressing roller 21.

[0049] Reference Figures 3 to 6 A pushing component 4 is provided on the mounting frame 31. The pushing component 4 is used to push the mounting frame 31 to rotate around the mounting shaft 32, so that the mounting frame 31 drives the scraper 33 to rotate. During the rotation of the scraper 33, the distance between the end of the scraper 33 and the surface of the first pressing roller 21 will change.

[0050] Reference Figures 3 to 6 The pushing assembly 4 includes a pushing plate 41 fixed on the mounting frame 31 and a pushing screw 42 threadedly connected to the frame 1. A pushing inclined surface 43 is provided on the pushing plate 41, and the end of the pushing screw 42 abuts against the pushing inclined surface 43. During the rotation of the pushing screw 42, it will push the pushing plate 41 on the mounting shaft 32 to rotate. During the rotation of the pushing plate 41, it will drive the scraper 33 set on the mounting frame 31 to rotate, thereby facilitating the adjustment of the distance between the end of the scraper 33 and the surface of the first pressing roller 21.

[0051] To facilitate the contact between the inclined surface 43 and the end face of the push screw 42, a torsion spring (not shown in the figure) is fitted on the mounting shaft 32. One end of the torsion spring is fixed to the mounting shaft 32, and the other end is fixed to the frame 1. The torsion spring keeps the scraper 33 horizontal in the initial state. During the rotation of the mounting frame 31 by the push screw 42, the torsion spring is in a charged state. Then, during the reverse rotation of the push screw 42, the torsion spring drives the mounting frame 31 to rotate in the reverse direction. Under the action of the torsion spring, the contact effect between the inclined surface 43 and the end face of the push screw 42 is better.

[0052] To reduce the friction between the push screw 42 and the push inclined surface 43 when the push screw 42 moves, an arc surface is provided at the end of the push screw 42 near the push inclined surface 43. The arc surface is in direct contact with the push inclined surface 43. In other embodiments, an abutment ball is rotatably connected to the end of the push rod near the push inclined surface 43. The abutment ball is in contact with the surface of the push inclined surface 43, thereby better reducing the friction between the push screw 42 and the push inclined surface 43.

[0053] Reference Figures 4 to 7 The air blowing assembly 5 includes an air blowing plate 51 and an air blowing box 52 fixed on the mounting bracket 31, and a first air blowing port 53 disposed on the air blowing plate 51. The air blowing plate 51 is coaxially disposed with the first pressing roller 21, and the inner side of the air blowing plate 51 is spaced apart from the surface of the first pressing roller 21 to form an arc-shaped air inlet channel 14. The upper surface of the air blowing box 52 is arc-shaped, and the upper surface of the air blowing box 52 is spaced apart from the surface of the first pressing roller 21. The air blowing plate 51 is disposed above the scraper 33, and the air blowing box 52 is disposed below the scraper 33. The air inlet channel 14 between the air blowing plate 51 and the first pressing roller 21 is connected to the air blowing box 52. In this embodiment, the first air blowing port 53 is connected to a first air blowing fan through a connecting pipe. The machine blows air into the first air inlet 53. The air at the first air inlet 53 enters the air intake channel 14, and then enters the air blowing box 52 through the gap between the scraper 33 and the first pressing roller 21. Since the gap between the scraper 33 and the surface of the first pressing roller 21 is smaller than the width of the air intake channel 14, the air pressure between the scraper 33 and the first pressing roller 21 will increase. At this time, the air passing between the first pressing roller 21 and the scraper 33 will be blown toward the surface of the first pressing roller 21. The air blown onto the surface of the first pressing roller 21 will clean the black powder particles attached to the surface of the first pressing roller 21. The cleaned black powder particles will enter the air blowing box 52 under the action of the air, and play a collection role.

[0054] When the gas blown onto the surface of the first pressing roller 21 fails to remove the large black powder particles adhering to its surface, the first pressing roller 21 will pass through the scraper 33 during its rotation. The scraper 33 will clean the large black powder particles adhering to the surface of the first pressing roller 21. During the cleaning process, the scraper 33 does not need to contact the surface of the first pressing roller 21, thereby reducing the wear between the scraper 33 and the surface of the first pressing roller 21. In this embodiment, the black powder particles adhering to the surface of the second pressing roller 22 are also cleaned in the same way. Since the method of cleaning the black powder particles on the surface of the first pressing roller 21 is the same, the detailed process of cleaning the surface of the second pressing roller 22 will not be described here.

[0055] Reference Figures 3 to 6 An arc-shaped surface 6 is provided on the inner wall of the air blowing box 52. The arc-shaped surface 6 is tangent to the surface of the first pressing roller 21. At the same time, the arc-shaped air inlet channel 14 is also tangent to the surface of the first pressing roller 21. When air is blown into the arc-shaped air inlet channel 14 through the first air blowing port 53, the gas in the air inlet channel 14 will enter the air blowing box 52. Some of the gas and the blown-off black powder particles will move along the arc-shaped surface 6 and then reach the other end of the arc-shaped surface 6. In this embodiment, the other end of the arc-shaped surface 6 is provided with an inclined surface. At the same time, a first partition plate 65 is provided in the air blowing box 52. The first partition plate 65 is parallel to the inclined surface, and an inclined discharge channel 15 is formed between the first partition plate 65 and the inclined surface.

[0056] Reference Figures 4 to 8 A discharge pipe 61 is fixedly installed on the bottom wall of the air blowing box 52. The discharge pipe 61 has a first inlet and a second inlet, and one end of the discharge pipe 61 has an opening. The first inlet is connected to one end of the arc-shaped discharge channel 15, and the discharge channel 15 is set at an angle to the discharge pipe 61 to facilitate the entry of black powder particles in the inclined discharge channel 15 into the discharge pipe 61, reducing the accumulation of black powder particles at the discharge channel 15 and the first connecting hole 66, and holding the particles through the first air blowing hole. When air is continuously blown into the air blowing box 52, the gas will enter the air blowing box 52. Some of the gas in the air blowing box 52 and the blown-off black powder particles will enter the inclined discharge channel 15, and enter the discharge pipe 61 through the first feed port. Some of the gas and blown-off black powder particles will enter the discharge pipe 61 through the second feed port. Finally, the cleaned-off black powder particles will be blown out from the opening of the discharge pipe 61, so as to facilitate the cleaning of black powder particles in the air blowing box 52.

[0057] Reference Figures 4 to 8A sealing block 64 is provided inside the air blowing chamber 52. The sealing block 64 is fixed on the inclined first partition plate 65, and a connecting hole 66 is provided on the sealing block 64. The connecting hole 66 is inclined and is set at an angle to the axis of the discharge pipe 61. The connecting hole 66 is connected to the second feed port. At this time, it is convenient for some of the blown-off black powder particles to enter the discharge pipe 61 through the connecting hole 66 and the second feed port. In this embodiment, under the action of the first partition plate 65, the sealing block 64 and the arc surface 6, the upper cross section of the cavity of the air blowing chamber 52 is small, the middle cross section is large and the lower cross section is small. This facilitates the gas to enter the air blowing chamber 52 from the upper end, and also facilitates the gas and the blown-off dust to enter the discharge pipe 61 from the lower end.

[0058] Reference Figures 4 to 8 A heating air duct 13 is provided on the air blowing plate 51. The heating air duct 13 is used to heat the surface of the first pressing roller 21. The heating air duct 13 is arranged facing the surface of the first pressing roller 21. At the same time, a fan and a heater are provided on the frame 1. The air blown out by the fan is heated by the heater and then enters the heating air duct 13 through the connecting pipe. The surface of the first pressing roller 21 is heated through the opening of the heating air duct 13. In the prior art, the heating source is usually set inside the first pressing roller 21. However, this application can heat the surface while heating the inside of the first pressing roller 21, thereby improving the pressing effect of the battery electrode.

[0059] The implementation principle of the battery electrode rolling device in this application embodiment is as follows: Unpressed battery electrodes are installed on the feeding roller 11. The feeding roller 11 feeds the unpressed battery electrodes through multiple pressing components 2. Under the action of multiple first pressing rollers 21 and second pressing rollers 22, the battery electrodes can be pressed. During the pressing process, hot air is blown onto the first pressing rollers 21 and second pressing rollers 22 by the action of a fan and a heater to heat the surfaces of the first pressing rollers 21 and second pressing rollers 22, so that the pressed battery electrodes have a better effect.

[0060] During the rotation of the first pressing roller 21 and the second pressing roller 22, black powder particles on the battery electrode sheets adhere to the surfaces of the first pressing roller 21 and the second pressing roller 22. Air is blown into the air intake channel 14 by the first blowing fan. The air in the air intake channel 14 enters the blowing box 52 through the gap between the first pressing roller 21 and the scraper 33. Since the blowing box 52 has an arc-shaped surface 6 inside, and this arc-shaped surface 6 is tangent to the surface of the first pressing roller 21, the gap between the first pressing roller 21 and the scraper 33 is on the same arc-shaped surface 6 as the air intake channel 14. At this time, the air passes through the first... The gas in the gap between the pressure roller 21 and the scraper 33 is blown toward the surface of the first pressure roller 21 to clean the black powder particles attached to the surface of the first pressure roller 21. Some of the cleaned black powder particles will enter the discharge channel 15 along the arc surface 6 with the gas, and enter the discharge pipe 61 through the discharge channel 15 and the first discharge port. Some gas and black powder particles enter the discharge pipe 61 through the connecting hole 66 and the second discharge port, and finally exit the blowing box 52 through the opening of the discharge pipe 61, so as to facilitate the cleaning of black powder particles in the blowing box 52.

[0061] When the gas blown onto the surface of the first pressing roller 21 fails to remove the large black powder particles adhering to its surface, the first pressing roller 21 will pass through the scraper 33 during its rotation. The scraper 33 will remove the large black powder particles adhering to the surface of the first pressing roller 21. During the cleaning process, the scraper 33 does not need to contact the surface of the first pressing roller 21, thereby reducing the wear between the scraper 33 and the surface of the first pressing roller 21.

[0062] The second aspect:

[0063] A method of using a battery electrode rolling device includes the following steps:

[0064] S1: Adjust the angle of the scraper 33 by pushing the component 4 so that the end of the scraper 33 is spaced apart from the surface of the first pressing roller 21;

[0065] S2: Air is blown into the air intake channel 14 through the first air blowing port 53, and the gas enters the air blowing box 52 along the arc surface 6 through the air intake channel 14.

[0066] S3: The gas entering the blowing box 52 blows off the black powder particles attached to the surface of the first pressing roller 21, and enters the discharge channel 15, and then enters the discharge pipe 61 through the discharge channel 15.

[0067] The implementation principle of the battery electrode rolling device in this application embodiment is as follows: In the production equipment, the loose battery electrode is placed on the feeding roller 11, and then the material is conveyed by the operation of the feeding roller 11. During this process, the battery electrode will pass through several sets of pressing components 2 in sequence, wherein the first pressing roller 21 and the second pressing roller 22 of each set work together to gradually apply pressure to the battery electrode to complete the compaction operation. At the same time, the matching fan and heater operate synchronously to heat the first pressing roller 21 and the second pressing roller 22.

[0068] When the first pressing roller 21 and the second pressing roller 22 rotate continuously, black powder particles on the surface of the battery electrode easily adhere to the roller surface. At this time, air is injected into the air inlet channel 14 by an external blower. The gas enters the air blowing box 52 through the narrow space between the first pressing roller 21 and the scraper 33. The air blowing box 52 has an arc-shaped curved surface tangent to the outer edge of the first pressing roller 21. This gap and the air inlet channel 14 are both distributed on the same arc surface, which allows the high-speed airflow to accurately impact the roller surface of the first pressing roller 21, effectively peeling off the adhered black powder particles. The separated black powder particles enter the discharge channel 15 along the arc surface 6 with the airflow. Part of them flow into the discharge pipe 61 through the first discharge port, and the other part enters the discharge pipe 61 through the connecting hole 66 and the second discharge port, and is finally discharged from the opening of the discharge pipe 61, thereby achieving efficient cleaning of the black powder particles remaining in the air blowing box 52.

[0069] When stubborn large black powder particles on the surface of the first pressing roller 21 are difficult to remove completely by airflow, the surface of the first pressing roller 21 will periodically pass over the scraper 33 during the rotation of the first pressing roller 21. The scraper 33 can complete the cleaning task without direct contact with the roller body. It can effectively remove large black powder particles and greatly reduce the frictional wear between the scraper 33 and the roller body surface, thus extending the service life of the equipment.

[0070] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A battery electrode rolling device, comprising a frame, characterized in that: The frame is equipped with a pressing assembly for compacting black powder particles coated on aluminum foil. The pressing assembly includes a first pressing roller and a second pressing roller rotatably connected to the frame. The first pressing roller and the second pressing roller are spaced apart. The frame is also equipped with an air blowing assembly for blowing air onto the surface of the first pressing roller. Scraping assemblies are provided at corresponding positions of the first pressing roller and the second pressing roller on the frame. The air blowing assembly includes an air blowing plate on the scraping assembly, an air blowing box on the frame, and a first air blowing port on the air blowing plate. The inner side of the air blowing plate forms an arc-shaped air inlet channel with the surface of the first pressing roller. The air inlet channel is connected to the air blowing box. The inner wall of the air blowing box is provided with an arc-shaped surface that is tangent to the surface of the first pressing roller. The air inlet channel is also tangent to the surface of the first pressing roller. The scraping assembly includes a mounting bracket fixed to the frame, a mounting shaft fixed to the mounting bracket, and a scraper fixed to the mounting bracket. The mounting shaft is rotatably connected to the frame, and the end of the scraper away from the mounting shaft is spaced apart from the first pressure roller. The air blowing plate is positioned above the scraper, and the gap between the scraper and the surface of the first pressing roller is smaller than the width of the air inlet channel; The air blowing box is equipped with a first partition plate, and the other end of the arc surface is equipped with an inclined surface. The first partition plate and the inclined surface are arranged parallel to each other, and an inclined discharge channel is formed between the first partition plate and the inclined surface. A discharge pipe is fixedly installed on the bottom wall of the air blowing box. A first inlet is opened on the discharge pipe. One end of the discharge pipe is provided with an opening. The first inlet is connected to one end of the discharge channel, and the inlet channel is set at an angle to the axis of the discharge pipe. A second feed inlet is provided on the discharge pipe, and a sealing block is provided inside the air blowing box. The sealing block is fixed on the inclined first partition plate, and a connecting hole is provided on the sealing block. The connecting hole is inclined and communicates with the second feed inlet.

2. The battery electrode rolling device according to claim 1, characterized in that: A torsion spring is fitted on the mounting shaft, with one end of the torsion spring fixed to the mounting shaft and the other end fixed to the mounting bracket. The torsion spring keeps the scraper horizontal. A pushing component is provided on the mounting bracket, which is used to push the mounting shaft to rotate, thereby causing the mounting shaft to drive the scraper to rotate.

3. The battery electrode rolling device according to claim 2, characterized in that: The pushing assembly includes a pushing plate fixed on a mounting shaft and a pushing screw threaded onto a mounting bracket. The pushing plate is provided with a pushing inclined surface, and the end of the pushing screw abuts against the pushing inclined surface.

4. The battery electrode rolling device according to claim 3, characterized in that: The end of the push screw near the push inclined surface is provided with an arc surface, which abuts against the push inclined surface.

5. The battery electrode rolling device according to claim 1, characterized in that: The air blowing plate is provided with a heating air duct, which is used to heat the surface of the first pressing roller, and the heating air duct is arranged towards the surface of the first pressing roller.

6. The battery electrode rolling device according to claim 1, characterized in that: The second pressing roller on the frame is also equipped with a scraping component and an air blowing component at the corresponding position.

7. A method of using a battery electrode rolling device, characterized in that: The battery electrode rolling device according to claim 4 includes the following steps: S1: Adjust the scraper angle by pushing the component so that the scraper tip is spaced apart from the surface of the first pressure roller; S2: Air is blown into the air intake channel through the first air inlet, and the gas enters the air blowing box along the arc surface of the air intake channel; S3: The gas entering the blowing box blows off the black powder particles attached to the surface of the first pressing roller and into the discharge channel, and then into the discharge pipe.

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