Battery pole piece rolling device and use method thereof

Abstract

The invention relates to the technical field of lithium battery production, in particular to a battery pole piece rolling device and a using method thereof.The battery pole piece rolling device comprises a rack, the rack is provided with a pressing assembly used for pressing black powder particles coated on aluminum foil, and the pressing assembly comprises a first pressing roller and a second pressing roller which are rotationally connected to the rack; the first pressing roller and the second pressing roller are arranged in a spaced mode, and an air blowing assembly used for blowing air to the surface of the first pressing roller is arranged on the rack. The blowing assembly comprises a blowing plate arranged on the scraping assembly, a blowing box body arranged on the rack and a first blowing opening formed in the blowing plate, the inner side face of the blowing plate and the surface of the first pressing roller form an arc-shaped air inlet channel, and the air inlet channel communicates with the blowing box body; and the inner wall of the blowing box body is provided with an arc-shaped surface. The device has the effect of reducing surface abrasion of the first pressing roller.

Description

TECHNICAL FIELD

[0001] 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. BACKGROUND

[0002] The battery pole piece is a key core component of a lithium ion battery, and directly determines the energy density, cycle life and safety performance of the battery. Its production background technology deeply integrates material science, electrochemical principles and precision manufacturing processes, and needs to form a uniform and stable slurry system through precise proportioning of active substances (such as positive and negative electrode materials), conductive agents and binders, and then through coating, rolling, slitting and other processes to produce a composite structure with a specific porosity and surface density.

[0003] For example, the Chinese patent document with the publication number CN220233233U discloses a battery pole piece rolling device, which comprises a rack, a first roller rotatably connected with the rack, and a second roller rotatably connected with the rack. The wheel shafts of the second roller and the first roller are arranged in parallel, and there is a material passing gap between the second roller and the first roller. The first roller and the second roller are configured to roll the battery pole piece when the battery pole piece passes through the material passing gap. A heating power supply is electrically connected to both ends of the battery pole piece in the extension direction, and is configured to make the battery pole piece generate heat after being started. The electrical and physical properties of the conductive substrate of the battery pole piece are used to directly pass electricity to make it heat, and the active substance coated on the surface of the conductive substrate is heated by heat transfer. After heating, the ductility of the conductive substrate and the active substance is enhanced, and the processability is improved.

[0004] In the above related technology, a material passing gap is arranged between the second roller and the first roller. The coated electrode piece passes through the material passing gap between the second roller and the first roller, and the coated electrode piece is compressed through the material passing gap. In the process of compressing the coated electrode piece, the black powder particles coated on the aluminum foil will directly contact the second roller and the first roller. In the process of compression, the black powder particles will adhere to the surface of the second roller and the first roller. At this time, a scraper needs to be arranged on the rack, and the scraper abuts against the surface of the second roller and the first roller. In the process of rotating the second roller and the first roller, the black powder particles adhering to the surface of the second roller and the first roller are cleaned by the scraper. However, when cleaning the black powder particles on the surface of the second roller and the first roller, the scraper contacts the surface of the second roller and the first roller, which causes 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

[0005] The application provides a battery pole piece rolling device and a use method thereof, and aims to solve the problem of wear of a second roller, a first roller and a scraper in the prior art.

[0006] First aspect: The application provides a battery pole piece rolling device which adopts the following technical scheme: A battery pole piece rolling device comprises a rack, a pressing assembly for compacting black powder particles coated on an aluminum foil is arranged on the rack, the pressing assembly comprises a first pressing roller and a second pressing roller which are rotationally connected to the rack, the first pressing roller and the second pressing roller are arranged at intervals, and a gas blowing assembly for blowing gas to the surface of the first pressing roller is arranged on the rack; a scraping assembly is arranged at a position corresponding to each of the first pressing roller and the second pressing roller on the rack; the gas blowing assembly comprises a gas blowing plate arranged on the scraping assembly, a gas blowing box arranged on the rack and a first gas blowing port arranged on the gas blowing plate, an inner side surface of the gas blowing plate forms an arc-shaped gas inlet channel with the surface of the first pressing roller, the gas inlet channel is in communication with the gas blowing box, an inner wall of the gas blowing box is provided with an arc surface which is tangent to the surface of the first pressing roller, and the gas inlet channel is also tangent to the surface of the first pressing roller.

[0007] By blowing gas to the first gas blowing port, the gas in the first gas blowing port enters the arc-shaped gas inlet channel, the gas in the gas inlet channel flows along the arc surface, the arc surface is tangent to the surface of the first pressing roller, the gas inlet channel is also tangent to the surface of the first pressing roller, and the gas inlet channel is in communication with the inside of the gas blowing box, when the gas in the first gas blowing port enters the gas blowing box through the gas inlet channel, the gas blows the black powder particles attached to the surface of the first pressing roller to fall off, the purpose of cleaning the surface of the first pressing roller is achieved, the gas blowing method is also used in the cleaning process of the second pressing roller, the wear of the first pressing roller and the second pressing roller can be reduced, the service life of the first pressing roller and the second pressing roller is prolonged, the black powder particles blown by the gas fall to the bottom of the gas blowing box under the action of gravity, and finally the cleaned black powder particles can be recycled, thereby saving resources.

[0008] Optionally, the scraping assembly is used for scraping the black powder particles attached to the surfaces of the first pressing roller and the second pressing roller; the scraping assembly comprises a mounting frame fixed to the rack, a mounting shaft fixed to the mounting frame and a scraper fixed to the mounting frame, the mounting shaft is rotationally connected to the rack, and the end of the scraper away from the mounting shaft is arranged at intervals from the first pressing roller.

[0009] By adopting the technical scheme, the scraper is arranged in space with the surface of the first compression roller, then the gas in the gas inlet channel passes through the gap between the first compression roller and the scraper, since the cross section of the gas inlet channel is smaller at the communication part of the gas inlet channel and the gas tank, the pressure of the gas entering the gas tank increases when the gas passes through the gap between the first compression roller and the scraper, and the impact force on the surface of the first compression roller also increases accordingly, so that the effect of cleaning the black powder particles attached to the surface of the first compression roller is better, since the first compression roller and the scraper are arranged in space, when the gas blowing to the first compression roller cannot clean the large black powder particles attached to the surface of the first compression roller, the large black powder particles are scraped off the surface of the first compression roller by the scraper when passing through the scraper, and the cleaned black powder particles also fall to the bottom of the gas blowing tank under the action of gravity, thereby facilitating the collection and recovery of the cleaned black powder particles.

[0010] Optionally, a first partition plate is arranged in the gas blowing tank, the first partition plate is arranged in parallel with the inclined surface, 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 gas blowing tank, a first feeding port is formed on the discharge pipe, an opening is arranged at one end of the discharge pipe, the first feeding port is in communication with one end of the discharge channel, and the feeding channel is arranged at an angle with the axis of the discharge pipe.

[0011] By adopting the technical scheme, a part of the gas flowing along the arc surface and the cleaned black powder particles enter the discharge channel, enter the discharge pipe through the discharge channel and the first feeding port, since the gas is continuously introduced into the gas blowing tank, a part of the gas and the black powder particles are discharged from the opening of the discharge pipe, so that the black powder particles in the gas blowing tank are conveniently cleaned, and in addition, since the feeding channel is arranged at an angle with the axis of the discharge pipe, the accumulation of black powder particles at the connection part of the feeding channel and the first feeding port is reduced.

[0012] Optionally, a second feeding port is formed on the discharge pipe, a plugging block is arranged in the gas blowing tank, the plugging block is fixed on the inclined first partition plate, a communication hole is formed on the plugging block, the communication hole is arranged obliquely, and the communication hole is in communication with the second feeding port.

[0013] By adopting the technical scheme, a part of the gas flowing along the arc surface and the cleaned black powder particles enter the discharge channel, another part enters the discharge pipe through the communication hole and the second feeding port, so that the cleaning effect of the black powder particles in the gas blowing tank is better, and in addition, since the communication hole is arranged obliquely, the accumulation of black powder particles at the connection part of the communication hole and the second feeding port is reduced.

[0014] Optionally, a torsional spring is sleeved on the mounting shaft, one end of the torsional spring is fixed on the mounting shaft, and the other end is fixed on the mounting frame, the torsional spring enables the scraper to be horizontally arranged, the mounting frame is provided with a pushing assembly, and the pushing assembly is used for pushing the mounting shaft to rotate, so that the mounting shaft drives the scraper to rotate.

[0015] By adopting the above technical scheme, the torsional spring enables the scraper to be horizontally arranged, the pushing assembly can be used for adjusting the angle of the scraper, then when the surface of the first compression roller cannot be completely cleaned, the pushing assembly is used for adjusting the position of the scraper, so that the end surface of the scraper abuts against the first compression roller, and the surface of the first compression roller can be better cleaned.

[0016] Optionally, the pushing assembly comprises a pushing plate fixed on the mounting shaft and a pushing screw threadedly connected to the mounting frame, and the pushing plate is provided with a pushing inclined surface, and the end of the pushing screw abuts against the pushing inclined surface.

[0017] By adopting the above technical scheme, when the angle of the scraper needs to be adjusted, the pushing screw is directly rotated, the movement of the pushing screw pushes the mounting shaft to rotate, the mounting shaft drives the scraper to rotate in the process of rotating, and the purpose of adjusting the position of the scraper is achieved.

[0018] Optionally, the end of the pushing screw close to the pushing inclined surface is provided with a circular arc surface, and the circular arc surface abuts against the pushing inclined surface.

[0019] By adopting the above technical scheme, since the position, at which the pushing screw abuts against the pushing inclined surface, is provided with a circular arc shape, the friction between the pushing screw and the pushing inclined surface can be reduced in the process in which the pushing screw pushes the pushing plate to rotate.

[0020] Optionally, the corresponding position of the second compression roller on the rack is also provided with a scraping assembly and a blowing assembly.

[0021] Optionally, the blowing plate is provided with a heating air duct, the heating air duct is used for heating the surface of the first compression roller, and the heating air duct is arranged towards the surface of the first compression roller.

[0022] The second aspect is: A use method of a battery pole piece rolling device, comprising the following steps: S1: adjusting the angle of the scraper by the pushing assembly, so that the end of the scraper is arranged to be spaced apart from the surface of the first compression roller; S2: blowing air into the air inlet channel through the first blowing port, and the air enters the blowing box along the arc surface through the air inlet channel; S3: the gas entering the blowing box blows the black powder particles attached to the surface of the first compression roller into the discharge channel, and then into the discharge pipe through the discharge channel.

[0023] By adopting the technical scheme, when the battery pole piece is compressed, the first compression roller and the second compression roller rotate, and the first compression roller and the second compression roller rotate to compress the black powder particles on the surface of the battery pole piece. In the compression process, a part of the black powder particles will adhere to the surface of the first compression roller and the second compression roller. At this time, the scraper can clean the large black powder particles adhering to the surface of the first compression roller and the second compression roller. The black powder particles that cannot be contacted by the scraper can be cleaned by the gas impact in the gas inlet channel. In the cleaning process, a part of the gas will enter the discharge channel through the arc surface and enter the discharge pipe through the discharge channel. Another part of the gas and the black powder particles will enter the discharge pipe through the communication hole and then be discharged through the discharge pipe. In the whole cleaning process, the scraper does not need to abut against the surface of the first compression roller, which can reduce the wear of the surface of the first compression roller and improve the service life of the first compression roller.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the gas in the first gas blowing port enters the gas inlet channel into the gas inlet box, the gas will blow the black powder particles adhering to the surface of the first compression roller to fall, achieving the purpose of cleaning the surface of the first compression roller, reducing the wear of the first compression roller, and improving the service life of the first compression roller. 2. When passing through the gap between the first compression roller and the scraper, the gas pressure entering the gas blowing box will increase, and the impact force on the surface of the first compression roller will also increase accordingly, so that the effect of cleaning the black powder particles adhering to the surface of the first compression roller is better. 3. A part of the gas flowing along the arc surface and the cleaned black powder particles will enter the discharge channel, enter the discharge pipe through the discharge channel and the first feeding port. Since the gas is continuously introduced into the gas blowing box, a part of the gas and the black powder particles will be discharged from the opening of the discharge pipe, achieving the purpose of facilitating the cleaning of the black powder particles in the gas blowing box. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a whole structure schematic diagram of the embodiment of the present application.

[0026] Figure 2 It is a whole structure top view of the embodiment of the present application.

[0027] Figure 3 It is a structure schematic diagram of the first compression roller and the gas blowing assembly of the embodiment of the present application.

[0028] Figure 4 It is a front view of the first compression roller of the embodiment of the present application.

[0029] Figure 5 It is a sectional view of the first compression roller of the embodiment of the present application.

[0030] Figure 6 is Figure 5 is an enlarged view of A in FIG.

[0031] Figure 7 is Figure 5 is an enlarged view of B in FIG.

[0032] Figure 8 is a schematic view of the blocking block and the communication hole structure of the embodiment of the application.

[0033] The figure mark: 1, rack; 11, feeding roller; 12, winding roller; 13, heating air duct; 14, air inlet channel; 15, discharging channel; 2, pressing assembly; 21, first pressing roller; 22, second pressing roller; 3, scraping assembly; 31, mounting frame; 32, mounting shaft; 33, scraper; 4, pushing assembly; 41, pushing plate; 42, pushing screw; 43, pushing slope; 5, blowing assembly; 51, blowing plate; 52, blowing box body; 53, first blowing port; 6, arc surface; 61, discharging pipe; 64, blocking block; 65, first partition plate; 66, communication hole. DETAILED DESCRIPTION

[0034] The following Figures 1-8 The application is further described in detail.

[0035] First aspect: The embodiment of the application discloses a battery pole piece rolling device. Figures 1 to 3 A battery pole piece rolling device comprises a rack 1 and a plurality of pressing assemblies 2 arranged on the rack 1, the pressing assemblies 2 are used for compacting black powder particles coated on an aluminum foil, the plurality of pressing assemblies 2 are arranged at intervals along the length of the rack 1, a feeding roller 11 and a winding roller 12 are arranged on the rack 1, the feeding roller 11 is used for unwinding a wound battery pole piece which is not compacted, and the winding roller 12 is used for winding a compacted battery pole piece, the battery pole piece is composed of the aluminum foil and the black powder particles coated on the aluminum foil.

[0036] Referring to Figures 1 to 3 The pressing assembly 2 comprises a first pressing roller 21 and a second pressing roller 22 which are rotationally connected to the rack 1, the first pressing roller 21 and the second pressing roller 22 are arranged at intervals, and the battery pole piece which needs to be compacted passes through the compacting gap between the first pressing roller 21 and the second pressing roller 22, in the embodiment, in the direction from the feeding roller 11 to the winding roller 12, the compacting gap between the first pressing roller 21 and the second pressing roller 22 gradually decreases, the black powder particles on the aluminum foil can be gradually compacted, and the compacting effect of the battery pole piece is better.

[0037] Referring to Figures 1 to 3At corresponding positions of the first and second compression rollers 21 and 22 on the rack 1, scraping assemblies 3 are arranged, which are used to scrape the black powder particles attached to the surfaces of the first and second compression rollers 21 and 22. Since the scraping assemblies 3 corresponding to the first and second compression rollers 21 and 22 are of the same structure, only the scraping assembly 3 corresponding to the first compression roller 21 will be described in detail, and the specific structure of the scraping assembly 3 corresponding to the second compression roller 22 will not be described in detail.

[0038] With reference to Figures 3 to 6 The scraping assembly 3 comprises a mounting frame 31 fixed on the rack 1, a mounting shaft 32 fixed on the mounting frame 31, and a scraper 33 fixed on the mounting frame 31. The mounting shaft 32 is rotationally connected to the rack 1, and the end of the scraper 33 away from the mounting shaft 32 is arranged in a spaced manner with the first compression roller 21. Meanwhile, a blowing assembly 5 is arranged on the rack 1, which blows air to the gap between the scraper 33 and the first compression roller 21, so as to facilitate blowing off the black powder particles attached to the surface of the first compression roller 21.

[0039] With reference to Figures 3 to 6 A pushing assembly 4 is arranged on the mounting frame 31, which 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 compression roller 21 changes.

[0040] With reference to Figures 3 to 6 The pushing assembly 4 comprises a pushing plate 41 fixed on the mounting frame 31 and a pushing screw 42 threadedly connected to the rack 1. Meanwhile, a pushing inclined surface 43 is arranged 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, the pushing plate 41 on the mounting shaft 32 is pushed to rotate, and the pushing plate 41 drives the scraper 33 arranged on the mounting frame 31 to rotate during the rotation, so as to facilitate adjusting the distance between the end of the scraper 33 and the surface of the first compression roller 21.

[0041] In order to facilitate the abutment of the pushing inclined surface 43 against the end surface of the pushing screw 42, a torsional spring (not shown in the figure) is sleeved on the mounting shaft 32. One end of the torsional spring is fixed on the mounting shaft 32, and the other end is fixed on the rack 1. The torsional spring makes the scraper 33 horizontally arranged in an initial state. During the rotation of the pushing screw 42 to push the mounting frame 31 to rotate, the torsional spring is in an energized state. Then, during the reverse rotation of the pushing screw 42, the torsional spring drives the mounting frame 31 to reversely rotate. Under the action of the torsional spring, the abutment effect of the pushing inclined surface 43 against the end surface of the pushing screw 42 is better.

[0042] In order to reduce the friction between the pushing screw 42 and the pushing slope 43 when the pushing screw 42 moves, a circular arc surface is arranged at one end of the pushing screw 42 close to the pushing slope 43, and the circular arc surface is in direct contact with the pushing slope 43. In other embodiments, an abutting ball is rotatably connected to the one end of the pushing screw close to the pushing slope 43, and the abutting ball is in surface contact with the pushing slope 43, so that the friction between the pushing screw 42 and the pushing slope 43 can be better reduced.

[0043] With reference to Figures 4 to 7 The air blowing assembly 5 includes an air blowing plate 51 and an air blowing box body 52 fixed on the mounting frame 31, and a first air blowing port 53 arranged on the air blowing plate 51. The air blowing plate 51 is coaxially arranged with the first compression roller 21, and the inner side of the air blowing plate 51 is arranged in a spaced manner with the surface of the first compression roller 21 to form an arc-shaped air inlet channel 14. The upper surface of the air blowing box body 52 is arranged in an arc shape, and the upper surface of the air blowing box body 52 is arranged in a spaced manner with the surface of the first compression roller 21. The air blowing plate 51 is arranged above the scraper 33, and the air blowing box body 52 is arranged below the scraper 33. The air inlet channel 14 between the air blowing plate 51 and the first compression roller 21 is in communication with the air blowing box body 52. In this embodiment, the first air blowing port 53 is connected with a first air blowing fan through a connecting pipe. The first air blowing fan blows air to the first air blowing port 53. The air at the first air blowing port 53 enters the air inlet channel 14, and then enters the air blowing box body 52 from the gap between the scraper 33 and the first compression roller 21. Since the gap between the scraper 33 and the surface of the first compression roller 21 is smaller than the width of the air inlet channel 14, the air pressure between the scraper 33 and the first compression roller 21 will be increased. At this time, the air passing between the first compression roller 21 and the scraper 33 will blow to the surface of the first compression roller 21. The air blowing to the surface of the first compression roller 21 will clean the black powder particles attached to the surface of the first compression roller 21. The cleaned black powder particles will enter the air blowing box body 52 under the action of the air, thereby achieving the effect of collection.

[0044] When the air blowing to the surface of the first compression roller 21 fails to clean the large black powder particles attached to the surface thereof, the first compression roller 21 will pass through the scraper 33 during rotation, and the large black powder particles attached to the surface of the first compression roller 21 will be cleaned by the scraper 33. During the cleaning process, the scraper 33 does not need to be in contact with the surface of the first compression roller 21, so that the abrasion between the scraper 33 and the surface of the first compression roller 21 can be reduced. In this embodiment, the black powder particles attached to the surface of the second compression roller 22 are also cleaned by the same method. Since the cleaning method of the black powder particles attached to the surface of the first compression roller 21 is the same, the detailed process of cleaning the surface of the second compression roller 22 will not be described herein.

[0045] With reference to Figures 3 to 6The arc-shaped surface 6 is tangent to the surface of the first pressing roller 21, and 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 air in the air inlet channel 14 enters the air blowing box 52, and part of the air and the black powder particles blown away 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, and the air blowing box 52 is provided with a first partition plate 65, which is arranged in parallel with the inclined surface. An inclined discharge channel 15 is formed between the first partition plate 65 and the inclined surface.

[0046] With reference to Figures 4 to 8 The air blowing box 52 is provided with a discharge pipe 61 fixedly installed on the bottom wall. The discharge pipe 61 is provided with a first feeding port and a second feeding port, and one end of the discharge pipe 61 is provided with an opening. The first feeding port is in communication with one end of the arc-shaped discharge channel 15, and the discharge channel 15 is arranged at an angle with the discharge pipe 61, so that the black powder particles in the inclined discharge channel 15 can enter the discharge pipe 61, and the accumulation of black powder particles at the discharge channel 15 and the first communication hole 66 is reduced. When air is continuously blown into the air blowing box 52 through the first air blowing hole, the air enters the air blowing box 52, part of the air and the black powder particles blown away in the air blowing box 52 enter the inclined discharge channel 15, part of the air and the black powder particles blown away enter the discharge pipe 61 through the first feeding port, and finally the cleaned black powder particles are blown out of the opening of the discharge pipe 61, so that the black powder particles in the air blowing box 52 can be conveniently cleaned.

[0047] With reference to Figures 4 to 8 The air blowing box 52 is provided with a blocking block 64 fixed on the inclined first partition plate 65. The blocking block 64 is provided with a communication hole 66, which is arranged at an angle with the axis of the discharge pipe 61 and is in communication with the second feeding port. At this time, part of the black powder particles blown away can enter the discharge pipe 61 through the communication hole 66 and the second feeding port. In this embodiment, under the action of the first partition plate 65, the blocking block 64 and the arc-shaped surface 6, the upper end cross section of the cavity of the air blowing box 52 is small, the middle cross section is large, and the lower end cross section is small. Then, the air can enter the air blowing box 52 from the upper end, and the air and the dust blown down can also enter the discharge pipe 61 from the lower end.

[0048] With reference to Figures 4 to 8The heating air duct 13 is arranged on the blowing plate 51 and is used for heating the surface of the first compression roller 21. The heating air duct 13 is arranged towards the surface of the first compression roller 21. A fan and a heater are arranged on the rack 1. The air blown by the fan is heated by the heater, enters the heating air duct 13 through the connecting pipe, and heats the surface of the first compression roller 21 through the opening of the heating air duct 13. In the prior art, the heating source is usually arranged inside the first compression roller 21. However, the present application can heat the surface of the first compression roller 21 while heating the inside of the first compression roller 21, so that the compression effect of the battery pole piece is better.

[0049] The implementation principle of the battery pole piece roller pressing device is as follows: the un-compressed battery pole piece is arranged on the feeding roller 11, is fed by the feeding roller 11, and sequentially passes through the plurality of compression assemblies 2. The battery pole piece is compressed under the action of the plurality of first compression rollers 21 and second compression rollers 22. In the compression process, the fan and the heater blow hot air to the first compression roller 21 and the second compression roller 22, heat the surfaces of the first compression roller 21 and the second compression roller 22, and make the compressed battery pole piece better.

[0050] In the rotating process of the first compression roller 21 and the second compression roller 22, the black powder particles on the battery pole piece adhere to the surfaces of the first compression roller 21 and the second compression roller 22. The first blowing fan blows air into the air inlet channel 14. The air in the air inlet channel 14 enters the blowing box body 52 through the gap between the first compression roller 21 and the scraper 33. The blowing box body 52 is internally provided with the arc surface 6, the arc surface 6 is tangent to the surface of the first compression roller 21, the gap between the first compression roller 21 and the scraper 33 is on the same arc surface 6 as the air inlet channel 14. At this time, the gas passing through the gap between the first compression roller 21 and the scraper 33 blows to the surface of the first compression roller 21, cleans the black powder particles adhered to the surface of the first compression roller 21, a part of the cleaned black powder particles enters the discharge channel 15 together with the gas, enters the discharge pipe 61 through the discharge channel 15 and the first discharge port, a part of the gas and the black powder particles enter the discharge pipe 61 through the communication hole 66 and the second discharge port, and finally are discharged from the blowing box body 52 through the opening of the discharge pipe 61, so that the black powder particles in the blowing box body 52 are conveniently cleaned.

[0051] When the gas blowing to the surface of the first compression roller 21 cannot clean the large black powder particles adhered to the surface, the first compression roller 21 passes through the scraper 33 in the rotating process. The scraper 33 cleans the large black powder particles adhered to the surface of the first compression roller 21. In the cleaning process, the scraper 33 does not need to be in contact with the surface of the first compression roller 21, so that the wear of the scraper 33 and the surface of the first compression roller 21 is reduced.

[0052] The second aspect is: A method for using a battery pole piece rolling device, comprising the following steps: S1: Adjust the angle of the scraper 33 by the pushing assembly 4, so that the end of the scraper 33 is spaced apart from the surface of the first compression roller 21; S2: Blow air into the air inlet 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 inlet channel 14; S3: The gas entering the air blowing box 52 blows off the black powder particles adhering to the surface of the first compression roller 21, enters the discharge channel 15, and enters the discharge pipe 61 through the discharge channel 15.

[0053] The implementation principle of the battery pole piece rolling device in the embodiment of the application is as follows: in the production equipment, the battery pole piece in a loose state is arranged on the feeding roller 11, and then the material conveying is realized by the operation of the feeding roller 11. In this process, the battery pole piece sequentially passes through a plurality of groups of compression assemblies 2, wherein the first compression roller 21 and the second compression roller 22 of each group work cooperatively, gradually apply pressure to the battery pole piece to complete the compaction operation, and at the same time, the synchronous operation of the fan and the heater is matched to heat the first compression roller 21 and the second compression roller 22.

[0054] When the first compression roller 21 and the second compression roller 22 continue to rotate, the black powder particles on the surface of the battery pole piece are easily adhered to the surface of the roller body. At this time, the external air blower injects air into the air inlet channel 14, the gas enters the air blowing box 52 through the narrow space between the first compression roller 21 and the scraper 33, the air blowing box 52 is internally structured with an arc curved surface tangent to the outer edge of the first compression roller 21, and the gap and the air inlet channel 14 are both distributed on the same arc surface, so that the high-speed airflow can accurately impact the roller body surface of the first compression roller 21, effectively stripping 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 which is collected into the discharge pipe 61 through the first discharge port, and the other part enters the discharge pipe 61 through the communication hole 66 and the second discharge port, and finally is discharged from the opening of the discharge pipe 61, thereby realizing efficient cleaning of the residual black powder particles in the air blowing box 52.

[0055] For the stubborn large black powder particles on the surface of the first compression roller 21, which are difficult to completely remove by airflow, the surface of the first compression roller 21 periodically passes through the scraper 33 during rotation. The scraper 33 can complete the cleaning task without direct contact with the roller body, which can effectively remove large black powder particles and greatly reduce the friction loss of the scraper 33 and the roller body surface, thereby prolonging the service life of the equipment.

[0056] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A battery pole piece rolling device comprising a rack (1), characterized in that: The rack (1) is provided with a compacting assembly (2) for compacting black powder particles coated on the aluminum foil, the compacting assembly (2) comprises a first compacting roller (21) and a second compacting roller (22) rotatably connected to the rack (1), the first compacting roller (21) is spaced apart from the second compacting roller (22), and the rack (1) is provided with a blowing assembly (5) for blowing air on the surface of the first compacting roller (21); the first compacting roller (21) and the second compacting roller (22) on the rack (1) are provided with a scraping assembly (3) at corresponding positions; the blowing assembly (5) comprises a blowing plate (51) provided on the scraping assembly (3), a blowing box body (52) provided on the rack (1), and a first blowing port (53) provided on the blowing plate (51), the inner side of the blowing plate (51) forms an arc-shaped air inlet channel (14) with the surface of the first compacting roller (21), the air inlet channel (14) is communicated with the blowing box body (52), the inner wall of the blowing box body (52) is provided with an arc surface (6), the arc surface (6) is tangent to the surface of the first compacting roller (21), and the air inlet channel (14) is also tangent to the surface of the first compacting roller (21).

2. The battery pole piece rolling device according to claim 1, wherein: The scraping assembly (3) comprises a mounting frame (31) fixed on the rack (1), a mounting shaft (32) fixed on the mounting frame (31), and a scraper (33) fixed on the mounting frame (31), the mounting shaft (32) is rotatably connected to the rack (1), and the scraper (33) is spaced apart from the first compacting roller (21) at the end away from the mounting shaft (32).

3. The battery pole piece rolling device according to claim 2, wherein: The blowing box body (52) is provided with a first partition plate (65), the other end of the arc surface (6) is provided with an inclined surface, the first partition plate (65) is arranged in parallel with the inclined surface, an inclined discharge channel (15) is formed between the first partition plate (65) and the inclined surface, a discharge pipe (61) is fixedly installed on the bottom wall of the blowing box body (52), a first feeding port is formed in the discharge pipe (61), an opening is formed at one end of the discharge pipe (61), the first feeding port is communicated with one end of the discharge channel (15), and the feeding channel is arranged at an angle with the axis of the discharge pipe (61).

4. The battery pole piece rolling device according to claim 3, wherein: A second feeding port is formed in the discharge pipe (61), the blowing box body (52) is provided with a blocking block (64), the blocking block (64) is fixed on the inclined first partition plate (65), and a communication hole (66) is formed in the blocking block (64), the communication hole (66) is arranged obliquely, and the communication hole (66) is communicated with the second feeding port.

5. The battery pole piece rolling device according to claim 4, wherein: A torsional spring is sleeved on the mounting shaft (32), one end of the torsional spring is fixed on the mounting shaft (32), the other end is fixed on the mounting frame (31), the torsional spring makes the scraper (33) horizontally arranged, the mounting frame (31) is provided with a pushing assembly (4), and the pushing assembly (4) is used for pushing the mounting shaft (32) to rotate, so that the mounting shaft (32) drives the scraper (33) to rotate.

6. The battery pole piece rolling device according to claim 5, wherein: The pushing assembly (4) comprises a pushing plate (41) fixed on the mounting shaft (32) and a pushing screw (42) screwed on the mounting frame (31), and the pushing plate (41) is provided with a pushing slope (43), and the end of the pushing screw (42) abuts against the pushing slope (43).

7. The battery pole piece rolling device of claim 6, wherein: The end of the pushing screw (42) close to the pushing slope (43) is provided with a circular arc surface, and the circular arc surface abuts against the pushing slope (43).

8. The battery pole piece rolling device of claim 1, wherein: The blowing plate (51) is provided with a heating air duct (13), and the heating air duct (13) is used for heating the surface of the first compression roller (21), and the heating air duct (13) is arranged towards the surface of the first compression roller (21).

9. The battery pole piece rolling device of claim 1, wherein: The second compression roller (22) on the rack (1) is also provided with a scraping assembly (3) and a blowing assembly (5) at the corresponding position.

10. A method of using a battery electrode rolling device, characterized in that: The battery pole piece rolling device comprises the following steps: S1: adjusting the angle of the scraper (33) through the pushing assembly (4), so that the end of the scraper (33) is arranged in a spaced manner with the surface of the first compression roller (21); S2: blowing air into the air inlet channel (14) through the first blowing port (53), and the air enters the blowing box body (52) along the arc surface (6) through the air inlet channel (14); S3: the gas entering the blowing box body (52) blows the black powder particles adhered to the surface of the first compression roller (21) into the discharge channel (15), and then into the discharge pipe (61) through the discharge channel (15).

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