Coating process for production of energy storage lithium ion batteries

Abstract

The present application relates to the technical field of battery production, in particular to a film coating process for energy storage type lithium ion battery production, and a slot coater comprising a fixed machine body, an angle adjusting device arranged inside the fixed machine body, and a coating die arranged inside the angle adjusting device. The film coating process for energy storage type lithium ion battery production only needs to twist the rod nut in the connecting part to change the position of the whole coating die in the fixed frame plate. When the rod head gear in the connecting part comes into contact with the groove surface tooth plate, the connecting lead screw in the connecting part will rotate, and the moving die will be slightly adjusted in position in the upper die plate, so as to quickly adjust the position of the slot coater head and the slot spacing, and reduce the skill and experience requirements of the operator.

Description

Technical Field

[0001] This invention relates to the field of battery manufacturing technology, and more specifically, to a coating process for the production of energy storage lithium-ion batteries. Background Technology

[0002] Lithium-ion batteries for energy storage are advanced rechargeable batteries with advantages such as high energy density, long lifespan, and environmental friendliness. The production process of lithium-ion batteries for energy storage is complex and delicate, involving multiple stages and technological steps. First, various raw materials need to be prepared and mixed to form a slurry. Then, the slurry is coated onto a separator using a coating process to form the positive and negative electrode films. Next, processes such as slicing, assembly, electrolyte injection, and sealing are carried out to finally form a complete battery. To ensure battery performance and stability, a slot coater is often used in the coating process to ensure the uniformity and thickness of the coated film.

[0003] However, when adjusting parameters such as the die head position and slit spacing of a slot coater, operators need to possess certain professional knowledge and skills to make accurate judgments and adjustments based on the actual situation. Furthermore, the angle between the coating die head and the feed roller has a significant impact on the coating process, and the angle needs to be adjusted reasonably to achieve coating indicators such as thickness, uniformity, adhesion, and surface quality that meet the requirements. However, existing slot coaters do not have the ability to quickly adjust the angle.

[0004] In view of this, we propose a coating process for the production of energy storage lithium-ion batteries.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide a coating process for the production of energy storage lithium-ion batteries, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] The coating process used in the production of energy storage lithium-ion batteries includes the following steps:

[0009] I. Preparation Stage

[0010] S1. First, place the aluminum foil inside the winding equipment, then mix the lithium salt, carbon material, conductive agent, and binder. After stirring and grinding, put the mixed coating material into the storage tank.

[0011] S2. Using a traction device, the aluminum foil of the winding device is passed sequentially through the slot coater, the drying device and the winding bracket, and the storage tank and the lower template in the coating die head of the slot coater are connected by an infusion pump and an infusion hose.

[0012] II. Coating Angle Adjustment Stage

[0013] S3. Based on the rheological characteristics of the coating material in the storage tank, start the dual-shaft motor in the angle adjustment device, and drive the gear at the shaft end to rotate through the connecting shaft;

[0014] S4. After the shaft end gear contacts the arc-shaped toothed plate in the fixed body, it drives the angle adjustment device and the coating die head to change their relative position with the rotating roller.

[0015] S5. After the coating die head moves to a position that matches the rheological properties of the coating material, turn off the dual-axis motor and use an external fixing device to ensure that the overall position of the angle adjustment device is fixed.

[0016] III. Fine-tuning stage of coating thickness

[0017] S6. Twist the rod nut in the docking part to drive the rotating screw to rotate, which in turn changes the position of the moving plate, the extension rod and the docking plate, thereby changing the distance between the coating die head and the rotating roller.

[0018] S7. When the coating die head moves as a whole, the rod head gear in the connecting part contacts the groove tooth plate, and through the secondary bevel gear at the other end of the connecting rod, it drives the main bevel gear and the rotating rod to rotate.

[0019] S8. As the rotating rod rotates, the mating gear also rotates, which in turn drives the rod gear and the connecting screw to rotate, thereby causing the moving mold to make a slight adjustment in the position of the upper template, thus changing the spacing of the material outlet slit of the coating die head.

[0020] IV. Coating Stage

[0021] S9. Start the infusion pump connected to the storage tank, and at the same time start the drive motor on the outside of the winding bracket to drive the aluminum foil to move, so that the raw material is evenly coated onto the surface of the aluminum foil through the coating die head.

[0022] S10. Start the drying device to remove the moisture and solvent from the coated raw material aluminum foil. The dried aluminum foil is then wound up inside the winding bracket as a battery material.

[0023] V. Follow-up Processing Stage

[0024] S11. The battery material inside the winding bracket is fed into the crushing and cutting device in sequence, and the battery material is cut into appropriate sizes according to the specifications of the battery.

[0025] The above steps use a winding device to feed the aluminum foil into the slot coater. The slot coater, in conjunction with the raw materials in the storage tank, performs the coating work on the surface of the aluminum foil. A drying device and a winding bracket are arranged sequentially on the front horizontal line of the slot coater.

[0026] The slot coating machine includes a fixed body, an angle adjustment device disposed inside the fixed body, and a coating die disposed inside the angle adjustment device.

[0027] The fixed body includes a machine body shell, an arc-shaped toothed plate disposed inside the longitudinal plates at the left and right ends of the machine body shell, a rotating roller connected to the center position of the inner side wall of the longitudinal plates at the left and right ends of the machine body shell, and two sets of guide rollers disposed vertically and parallel to each other in front of the rotating roller.

[0028] The angle adjustment device includes a fixed frame plate, a partition plate disposed between the square plates at the left and right ends of the fixed frame plate, a dual-axis motor disposed on the rear side wall of the fixed frame plate, a connecting shaft disposed on the output shafts at the left and right ends of the dual-axis motor, a shaft end gear disposed at the end of the connecting shaft and rotating therewith, a sliding frame sleeved on the outside of the shaft end gear, a grooved toothed plate disposed inside the square plates at the left and right ends of the fixed frame plate, and a mating part disposed at the center of the partition plate.

[0029] The coating die head includes a lower template, an upper template disposed above the lower template, a movable mold disposed inside the upper template, a plate top support disposed on the top surface of the upper template, and two sets of connecting parts disposed on the left and right ends of the plate top support.

[0030] The connecting part includes a connecting screw, a rod gear disposed on the outer side wall of the connecting screw near the top, a rotating rod disposed parallel to the outer side of the connecting screw, a rotating rod disposed at the top of the rotating rod and rotating with the rod gear, a main bevel gear disposed below the rod gear, a secondary bevel gear perpendicularly meshed with the main bevel gear, a connecting rod disposed inside the secondary bevel gear and rotating with it, and a rod head gear disposed at the outer end of the connecting rod.

[0031] In the technical solution of the present invention, arc-shaped sliding grooves for placing arc-shaped toothed plates are provided on the left and right longitudinal plates of the outer shell. Two vertically parallel and internally and externally connected adjustment grooves are provided on the left and right longitudinal plates of the outer shell near the front end. Several linearly distributed fixing holes are provided on the outer side of the front and rear ends of the adjustment grooves on the outer side wall of the outer shell.

[0032] In the technical solution of the present invention, the arc-shaped toothed plate is welded and fixed to the inner wall of the arc-shaped chute, the left and right ends of the rotating roller central shaft are respectively rotatably connected to the inner walls of the square plates at the left and right ends of the fixed frame plate, the left and right ends of the guide roller central shaft are fixedly connected to roller end fixing plates by bolts, the roller end fixing plates are fixedly connected to the outer wall of the fixed frame plate by bolts, and the lifting cabinet is fixedly connected to the bottom surface of the machine body shell by bolts.

[0033] In the technical solution of the present invention, the outer side walls of the left and right end square plates of the fixed frame plate near the front side are provided with through grooves that run through the inside and outside; the top corners of the inner side walls of the left and right end square plates of the fixed frame plate near the outside are provided with square grooves for placing the groove toothed plates. The partition plate is integrally formed with the fixed frame plate, and the groove toothed plates are welded and fixed to the inner bottom surface of the square grooves.

[0034] In the technical solution of the present invention, the dual-axis motor is fixedly connected to the rear side wall of the fixed frame plate by bolts, the connecting shaft is coaxially connected to the output shaft of the dual-axis motor, the shaft end gear is fixedly connected to the connecting shaft by a snap pin, the shaft end gear meshes with the arc-shaped toothed plate, the sliding frame is slidably connected to the inside of the arc-shaped groove, and the rear side walls at both ends of the fixed frame plate are fixedly connected with support frames for supporting the connecting shaft by bolts.

[0035] In the technical solution of the present invention, the docking part includes a movable plate, an extension rod disposed on the front sidewalls of the left and right ends of the movable plate, a docking plate disposed at the end of the extension rod, a rotating screw threadedly connected to the center of the rear sidewall of the movable plate, and a rod nut disposed at the rear end of the rotating screw.

[0036] In the technical solution of the present invention, the extension rod is snapped and fixed to the moving plate, the extension rod is slidably connected to the inside of the partition plate, the docking plate is integrally formed with the extension rod, the docking plate is fixedly connected to the lower template and the upper template by bolts, the rotating screw is rotatably connected to the rear side wall of the partition plate, and the rod nut is integrally formed with the rotating screw.

[0037] In the technical solution of the present invention, a mixing chamber for temporarily placing coating raw materials is provided on the inner top surface of the lower template, and a feeding channel connected to the mixing chamber is provided at the center of the rear side wall of the lower template. A sealing gasket for ensuring sealing performance is placed between the lower template and the upper template. The movable mold is slidably connected to the interior of the upper template. Two spiral grooves with opposite directions and vertically connected are provided at both ends of the top horizontal plate of the movable mold.

[0038] In the technical solution of the present invention, the top plate support is fixedly connected to the top surface of the upper template by bolts, and a fixing protrusion is integrally formed on the inner top surface of both the left and right ends of the top plate support. The lower template and the outer side walls of the left and right ends of the upper template are fixedly connected by screws to a connecting slider, and the connecting slider is slidably connected to the inside of the through groove of the plate body.

[0039] In the technical solution of the present invention, the connecting screw and the rotating rod are both rotatably connected to the inside of the plate top support. The rod body gear is fixedly connected to the connecting screw via a locking pin. The mating gear and the main bevel gear are both fixedly connected to the rotating rod via locking pins. The mating gear and the rod body gear mesh with each other. The secondary bevel gear and the rod head gear are both fixedly connected to the connecting rod via locking pins. The connecting rod is rotatably connected to the inside of the plate top support. The rod head gear meshes with the grooved tooth plate.

[0040] Compared with the prior art, the beneficial effects of the present invention are:

[0041] 1. The coating process used in the production of energy storage lithium-ion batteries involves starting a dual-axis motor in the angle adjustment device, which drives the shaft-end gear to rotate via a connecting shaft. After the shaft-end gear contacts the arc-shaped toothed plate in the fixed body, it can drive the angle adjustment device to change its relative position with the rotating roller, thereby achieving rapid adjustment of the coating die head angle.

[0042] 2. This coating process for the production of energy storage lithium-ion batteries can change the position of the coating die head on the fixed frame plate simply by turning the rod nut in the docking part. When the rod head gear in the connecting part contacts the groove tooth plate, the connecting screw in the connecting part will rotate, and the moving die will make a slight adjustment in position within the upper template. This allows for quick adjustment of the position of the slit coating machine head and the slit spacing, thereby reducing the skill and experience requirements for operators. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the overall structure of the invention;

[0044] Figure 2 This is a schematic diagram of the slit coating machine in the invention.

[0045] Figure 3 This is a schematic diagram of the structure of the fixed body in the invention;

[0046] Figure 4 This is an enlarged schematic diagram of part A in the invention;

[0047] Figure 5 This is a partial structural diagram of the slot coating machine in the invention.

[0048] Figure 6This is a schematic diagram of the angle adjustment device in the invention;

[0049] Figure 7 This is an enlarged schematic diagram of part B in the invention;

[0050] Figure 8 This is a schematic diagram of the docking part in the invention;

[0051] Figure 9 This is one of the structural schematic diagrams of the coating die head in the invention;

[0052] Figure 10 This is the second schematic diagram of the coating die head in the invention;

[0053] Figure 11 This is a structural breakdown diagram of the coating die head in the invention.

[0054] Figure 12 This is a partial structural diagram of the coating die head in the invention;

[0055] Figure 13 This is a schematic diagram of the movable mold in the invention;

[0056] Figure 14 This is a schematic diagram of the connecting part in the invention.

[0057] Explanation of reference numerals in the attached figures:

[0058] 1. Rewinding equipment;

[0059] 2. Slit coating machine; 20. Fixed body; 201. Machine body shell; 2010. Arc-shaped chute; 2011. Adjustment groove; 2012. Fixing hole; 202. Arc-shaped toothed plate; 203. Rotating roller; 204. Guide roller; 205. Roller end fixing plate; 206. Lifting cabinet; 21. Angle adjustment device; 210. Fixed frame plate; 2101. Plate through groove; 2102. Plate surface square groove; 211. Spacer plate; 212. Dual-shaft motor; 213. Connecting shaft; 214. Shaft end gear; 215. Sliding frame; 216. Support frame; 217. Groove surface toothed plate; 218. 2180. Connecting part; 2181. Moving plate; 2182. Extension rod; 2183. Connecting plate; 2184. Rotating screw; 2185. Rod nut; 22. Coating die head; 220. Lower template; 221. Sealing gasket; 222. Upper template; 223. Moving mold; 224. Plate top support; 225. Connecting part; 2250. Connecting screw; 2251. Rod gear; 2252. Rotating rod; 2253. Connecting gear; 2254. Main bevel gear; 2255. Secondary bevel gear; 2256. Connecting rod; 2257. Rod head gear; 226. Connecting slider;

[0060] 3. Storage tanks;

[0061] 4. Drying device;

[0062] 5. Winding bracket. Detailed Implementation

[0063] The technical solutions of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0064] Please see Figures 1-14 As shown, this embodiment provides the following technical solution:

[0065] The coating process used in the production of energy storage lithium-ion batteries includes the following steps:

[0066] I. Preparation Stage

[0067] S1. First, aluminum foil is placed inside the winding equipment 1. Then, lithium salt, carbon material, conductive agent and binder are mixed. After stirring and grinding, the mixed coating material is put into the storage tank 3.

[0068] S2. Using a traction device, the aluminum foil of the winding device 1 is passed sequentially through the slot coater 2, the drying device 4, and the winding bracket 5. The storage tank 3 and the lower template 220 inside the coating die head 22 in the slot coater 2 are connected by an infusion pump and an infusion hose.

[0069] II. Coating Angle Adjustment Stage

[0070] S3. Based on the rheological characteristics of the coating material in the storage tank 3, start the dual-axis motor 212 in the angle adjustment device 21, and drive the shaft end gear 214 to rotate through the connecting shaft 213;

[0071] S4. After the shaft end gear 214 contacts the arc-shaped toothed plate 202 in the fixed body 20, it drives the angle adjustment device 21 together with the coating die head 22 to change its relative position with the rotating roller 203.

[0072] S5. After the coating die head 22 moves to a position that matches the rheological properties of the coating material, turn off the dual-axis motor 212 and use an external fixing device to ensure that the overall position of the angle adjustment device 21 is fixed.

[0073] III. Fine-tuning stage of coating thickness

[0074] S6. Twist the rod nut 2184 in the docking part 218 to drive the rotating screw 2183 to rotate, which in turn causes the position of the moving plate 2180, the extension rod 2181 and the docking plate 2182 to change, thereby causing the distance between the coating die head 22 and the rotating roller 203 to change.

[0075] S7. When the coating die head 22 moves as a whole, the rod head gear 2257 in the connecting part 225 contacts the groove tooth plate 217, and drives the main bevel gear 2254 to rotate together with the rotating rod 2252 through the secondary bevel gear 2255 at the other end of the connecting rod 2256.

[0076] S8. As the rotating rod 2252 rotates, the mating gear 2253 also rotates, which in turn drives the rod gear 2251 and the connecting screw 2250 to rotate, thereby causing the moving mold 223 to make a slight adjustment in the position within the upper template 222, thereby changing the spacing of the discharge slit of the coating die head 22.

[0077] IV. Coating Stage

[0078] S9. Start the infusion pump connected to the storage tank 3, and at the same time start the external drive motor of the winding bracket 5 to drive the aluminum foil to move, so that the raw material is evenly coated onto the surface of the aluminum foil through the coating die head 22.

[0079] S10. Start the drying device 4 to remove the moisture and solvent from the coated raw material aluminum foil. The dried aluminum foil is then wound up inside the winding bracket 5 as a battery material.

[0080] V. Follow-up Processing Stage

[0081] S11. The battery material inside the winding bracket 5 is sequentially fed into the crushing and cutting device, and the battery material is cut into appropriate sizes according to the specifications of the battery.

[0082] In this embodiment, as Figure 1 As shown, the above steps use a winding device 1 to feed aluminum foil into the slot coater 2. The slot coater 2, in conjunction with the raw materials in the storage tank 3, performs coating work on the surface of the aluminum foil. A drying device 4 and a winding bracket 5 are arranged sequentially on the horizontal line at the front of the slot coater 2.

[0083] Furthermore, the winding device 1 is used to assemble the aluminum foil to be coated, and works with the external motor of the winding bracket 5 to ensure that the aluminum foil moves within the device. The storage tank 3 is used to store the mixed raw materials. The drying device 4 is used to quickly dry the coated raw materials. The winding bracket 5 is used to place the aluminum foil coated with the material.

[0084] In this embodiment, as Figures 2-4As shown, the slot coating machine 2 includes a fixed body 20, an angle adjustment device 21 disposed inside the fixed body 20, and a coating die 22 disposed inside the angle adjustment device 21.

[0085] Specifically, the fixed body 20 includes a body shell 201, an arc-shaped toothed plate 202 disposed inside the longitudinal plates at the left and right ends of the body shell 201, a rotating roller 203 connected to the center position of the inner side wall of the longitudinal plates at the left and right ends of the body shell 201, and two sets of guide rollers 204 disposed parallel to each other in front of the rotating roller 203.

[0086] Furthermore, arc-shaped grooves 2010 for placing arc-shaped toothed plates 202 are provided on the left and right longitudinal plates of the outer casing 201. Two vertically parallel and internally and externally connected adjustment grooves 2011 are provided on the left and right longitudinal plates of the outer casing 201 near the front end. Several linearly distributed fixing holes 2012 are provided on the outer side of the outer wall of the outer casing 201 at the front and rear ends of the adjustment grooves 2011.

[0087] Furthermore, the arc-shaped toothed plate 202 is welded and fixed to the inner wall of the arc-shaped chute 2010. The left and right ends of the central shaft of the rotating roller 203 are respectively rotatably connected to the inner walls of the square plates at the left and right ends of the fixed frame plate 210. The left and right ends of the central shaft of the guide roller 204 are fixedly connected to the roller end fixing plate 205 by bolts. The roller end fixing plate 205 is fixedly connected to the outer wall of the fixed frame plate 210 by bolts. The lifting cabinet 206 is fixedly connected to the bottom surface of the outer shell 201 by bolts.

[0088] Furthermore, the outer casing 201 is used to ensure the strength of the overall structure of the fixed body 20, the arc-shaped slide 2010 is used to provide a range for the movement of the angle adjustment device 21, the adjustment groove 2011 is used to provide a range for the adjustment of the guide roller 204, the fixing hole 2012 is used to ensure the fixing of the roller end fixing plate 205, and the arc-shaped toothed plate 202 is used to cooperate with the shaft end gear 214 to ensure the overall movement of the angle adjustment device 21.

[0089] In this embodiment, as Figures 6-7 As shown, the angle adjustment device 21 includes a fixed frame plate 210, a partition plate 211 disposed between the square plates at the left and right ends of the fixed frame plate 210, a dual-axis motor 212 disposed on the rear side wall of the fixed frame plate 210, a connecting shaft 213 disposed on the output shafts at the left and right ends of the dual-axis motor 212, a shaft end gear 214 disposed at the end of the connecting shaft 213 and rotating therewith, a sliding frame 215 sleeved on the outside of the shaft end gear 214, a grooved toothed plate 217 disposed inside the square plates at the left and right ends of the fixed frame plate 210, and a docking part 218 disposed at the center of the partition plate 211.

[0090] Specifically, the outer side walls of the square plates at both ends of the fixed frame plate 210 near the front are provided with through slots 2101 that run through the inside and outside; the top corners of the inner side walls of the square plates at both ends of the fixed frame plate 210 near the outside are provided with square slots 2102 for placing the slotted toothed plates 217. The partition plate 211 is integrally formed with the fixed frame plate 210, and the slotted toothed plates 217 are welded and fixed to the inner bottom surface of the square slots 2102.

[0091] Furthermore, the dual-axis motor 212 is fixedly connected to the rear side wall of the fixed frame plate 210 by bolts, the connecting shaft 213 is coaxially connected to the output shaft of the dual-axis motor 212, the shaft end gear 214 is fixedly connected to the connecting shaft 213 by a snap pin, the shaft end gear 214 meshes with the arc-shaped toothed plate 202, the sliding frame 215 is slidably connected to the inside of the arc-shaped slide groove 2010, and the rear side walls at both ends of the fixed frame plate 210 are fixedly connected with support frames 216 for supporting the connecting shaft 213 by bolts.

[0092] Furthermore, the fixed frame plate 210, together with the spacer plate 211, is used to ensure the overall structural strength of the angle adjustment device 21. After the dual-axis motor 212 is started, it drives the shaft end gear 214 to rotate through the connecting shaft 213. After the shaft end gear 214 contacts the arc-shaped toothed plate 202 in the fixed body 20, it drives the angle adjustment device 21, together with the coating die head 22, to change its relative position with the rotating roller 203. The sliding frame 215 is slidably connected to the connecting shaft 213 to ensure the stability of the movement of the angle adjustment device 21.

[0093] In this embodiment, as Figure 8 As shown, the docking part 218 includes a movable plate 2180, an extension rod 2181 disposed on the front sidewalls of the left and right ends of the movable plate 2180, a docking plate 2182 disposed at the end of the extension rod 2181, a rotating screw 2183 threadedly connected to the center of the rear sidewall of the movable plate 2180, and a rod nut 2184 disposed at the rear end of the rotating screw 2183.

[0094] Furthermore, the extension rod 2181 is snapped and fixed to the moving plate 2180, the extension rod 2181 is slidably connected to the inside of the partition plate 211, the connecting plate 2182 is integrally formed with the extension rod 2181, the connecting plate 2182 is fixedly connected to the lower template 220 and the upper template 222 by bolts, the rotating screw 2183 is rotatably connected to the rear side wall of the partition plate 211, and the rod nut 2184 is integrally formed with the rotating screw 2183.

[0095] Furthermore, by twisting the rod nut 2184 in the docking part 218, the rotating screw 2183 is rotated, which in turn causes the positions of the moving plate 2180, the extension rod 2181 and the docking plate 2182 to change, thereby causing the distance between the coating die head 22 and the rotating roller 203 to change.

[0096] In this embodiment, as Figures 9-14 As shown, the coating die head 22 includes a lower template 220, an upper template 222 disposed above the lower template 220, a movable mold 223 disposed inside the upper template 222, a plate top support 224 disposed on the top surface of the upper template 222, and two sets of connecting parts 225 disposed at the left and right ends of the plate top support 224.

[0097] Specifically, a mixing chamber for temporarily placing coating material is provided on the inner top surface of the lower template 220. A feeding channel connected to the mixing chamber is located at the center of the rear side wall of the lower template 220. A sealing gasket 221 is placed between the lower template 220 and the upper template 222 to ensure sealing performance. The movable mold 223 is slidably connected to the interior of the upper template 222. Two spiral grooves with opposite directions and vertical connection are provided at both ends of the top horizontal plate of the movable mold 223.

[0098] Furthermore, the top support 224 is fixedly connected to the top surface of the upper template 222 by bolts. The inner top surfaces of the left and right ends of the top support 224 are integrally formed with fixing protrusions 2240. The outer side walls of the left and right ends of the lower template 220 and the upper template 222 are fixedly connected with connecting sliders 226 by screws. The connecting sliders 226 are slidably connected to the inside of the plate through groove 2101.

[0099] Furthermore, the lower template 220, sealing gasket 221, and upper template 222 are used to ensure the sealing of the inside of the coating die head 22 after the raw material is injected into the mixing chamber of the lower template 220, protecting the raw material from contact with air. The change of position of the moving die 223 is used to change the slit spacing. The plate top bracket 224 is used to provide a placement area for the connecting part 225. The fixed protrusion 2240 is used to limit the movement range of the moving die 223.

[0100] In this embodiment, as Figures 12-14As shown, the connecting part 225 includes a connecting screw 2250, a rod gear 2251 disposed on the outer side wall of the connecting screw 2250 near the top, a rotating rod 2252 disposed parallel to the outer side of the connecting screw 2250, a rotating rod 2252 disposed at the top of the rotating rod 2252 and rotating with the rod gear 2251, a main bevel gear 2254 disposed below the rod gear 2251, a secondary bevel gear 2255 perpendicularly meshed with the main bevel gear 2254, a connecting rod 2256 disposed inside the secondary bevel gear 2255 and rotating with it, and a rod head gear 2257 disposed at the outer end of the connecting rod 2256.

[0101] Furthermore, the connecting screw 2250 and the rotating rod 2252 are both rotatably connected to the inside of the plate top support 224. The rod body gear 2251 is fixedly connected to the connecting screw 2250 by a locking pin. The mating gear 2253 and the main bevel gear 2254 are both fixedly connected to the rotating rod 2252 by locking pins. The mating gear 2253 and the rod body gear 2251 mesh with each other. The secondary bevel gear 2255 and the rod head gear 2257 are both fixedly connected to the connecting rod 2256 by locking pins. The connecting rod 2256 is rotatably connected to the inside of the plate top support 224. The rod head gear 2257 meshes with the groove surface tooth plate 217.

[0102] Furthermore, when the coating die head 22 moves as a whole, the rod head gear 2257 in the connecting part 225 contacts the groove tooth plate 217. Through the secondary bevel gear 2255 at the other end of the connecting rod 2256, the main bevel gear 2254 and the rotating rod 2252 are driven to rotate. As the rotating rod 2252 rotates, the mating gear 2253 also rotates, which drives the rod body gear 2251 and the connecting screw 2250 to rotate. This causes the moving die 223 to make a slight adjustment in its position within the upper template 222, thereby changing the spacing of the material outlet slit of the coating die head 22.

[0103] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coating process for the production of energy storage lithium-ion batteries, characterized in that: Includes the following steps: I. Preparation Stage S1. First, place the aluminum foil inside the winding equipment (1), then mix the lithium salt, carbon material, conductive agent and binder, and after stirring and grinding, put the mixed coating material into the storage tank (3). S2. Using a traction device, the aluminum foil of the winding device (1) is passed through the slot coater (2), the drying device (4) and the winding bracket (5) in sequence. The storage tank (3) and the lower template (220) in the coating die (22) of the slot coater (2) are connected by an infusion pump and an infusion hose. II. Coating Angle Adjustment Stage S3. Based on the rheological characteristics of the coating material in the storage tank (3), start the dual-axis motor (212) in the angle adjustment device (21), and drive the shaft end gear (214) to rotate through the connecting shaft (213); S4. After the shaft end gear (214) contacts the arc-shaped toothed plate (202) in the fixed body (20), it drives the angle adjustment device (21) together with the coating die head (22) to change its relative position with the rotating roller (203); S5. After the coating die head (22) is moved to a position that matches the rheological properties of the coating material, the dual-axis motor (212) is turned off, and the overall position of the angle adjustment device (21) is fixed by the external fixing device. III. Fine-tuning stage of coating thickness S6. Twist the rod nut (2184) in the docking part (218) to drive the rotating screw (2183) to rotate, which in turn causes the position of the moving plate (2180), the extension rod (2181) and the docking plate (2182) to change, thereby causing the distance between the coating die head (22) and the rotating roller (203) to change. S7. When the coating die head (22) moves as a whole, the rod head gear (2257) in the connecting part (225) comes into contact with the groove tooth plate (217), and through the secondary bevel gear (2255) at the other end of the connecting rod (2256), it drives the main bevel gear (2254) and the rotating rod (2252) to rotate. S8. As the rotating rod (2252) rotates, the mating gear (2253) also rotates, which drives the rod gear (2251) and the connecting screw (2250) to rotate, thereby causing the moving mold (223) to make a slight adjustment in the position of the upper template (222), thereby changing the spacing of the discharge slit of the coating die head (22). IV. Coating Stage S9. Start the infusion pump connected to the storage tank (3) and simultaneously start the external drive motor of the winding bracket (5) to drive the aluminum foil to move, thereby uniformly coating the raw material onto the surface of the aluminum foil through the coating die head (22). S10. Start the drying device (4) to remove the moisture and solvent from the coated raw material aluminum foil. The dried aluminum foil is then wound up inside the winding bracket (5) as a battery material. V. Follow-up Processing Stage S11. The battery material inside the winding bracket (5) is sequentially fed into the inside of the rolling and cutting device, and the battery material is cut into appropriate sizes according to the specifications of the battery. The above steps use a winding device (1) to send aluminum foil into the slot coater (2). The slot coater (2) works with the raw materials in the storage tank (3) to coat the aluminum foil surface. The slot coater (2) is equipped with a drying device (4) and a winding bracket (5) on the front horizontal line. The slot coating machine (2) includes a fixed body (20), an angle adjustment device (21) disposed inside the fixed body (20), and a coating die (22) disposed inside the angle adjustment device (21). The fixed body (20) includes a body shell (201), an arc-shaped toothed plate (202) disposed inside the left and right longitudinal plates of the body shell (201), a rotating roller (203) connected to the center of the inner sidewall of the left and right longitudinal plates of the body shell (201), and two sets of guide rollers (204) arranged vertically and horizontally in front of the rotating roller (203); an arc-shaped sliding groove (2010) for placing the arc-shaped toothed plate (202) is provided on the left and right longitudinal plates of the body shell (201), and two vertically and horizontally parallel adjusting grooves (2011) that are connected inside and outside are provided on the left and right longitudinal plates of the body shell (201) near the front end. The angle adjustment device (21) includes a fixed frame plate (210), a partition plate (211) disposed between the square plates at the left and right ends of the fixed frame plate (210), a dual-axis motor (212) disposed on the rear side wall of the fixed frame plate (210), a connecting shaft (213) disposed on the output shaft at the left and right ends of the dual-axis motor (212), a shaft end gear (214) disposed at the end of the connecting shaft (213) and rotating therewith, a sliding frame (215) sleeved on the outside of the shaft end gear (214), a grooved toothed plate (217) disposed inside the square plates at the left and right ends of the fixed frame plate (210), and a docking part (218) disposed at the center of the partition plate (211). The shaft end gear (214) meshes with the arc-shaped toothed plate (202). The docking part (218) includes a movable plate (2180), an extension rod (2181) disposed on the front sidewalls of the left and right ends of the movable plate (2180), a docking plate (2182) disposed at the end of the extension rod (2181), a rotating screw (2183) threadedly connected to the center of the rear sidewall of the movable plate (2180), and a rod nut (2184) disposed at the rear end of the rotating screw (2183). The coating die head (22) includes a lower template (220), an upper template (222) disposed above the lower template (220), a movable mold (223) disposed inside the upper template (222), a plate top support (224) disposed on the top surface of the upper template (222), and two sets of connecting parts (225) disposed at the left and right ends of the plate top support (224). The connecting part (225) includes a connecting screw (2250), a rod gear (2251) disposed on the outer side wall of the connecting screw (2250) near the top, a rotating rod (2252) disposed parallel to the outside of the connecting screw (2250), a rotating rod (2252) disposed at the top of the rotating rod (2252) and rotating with the rod gear (2251), a main bevel gear (2254) disposed below the rod gear (2251), a secondary bevel gear (2255) vertically meshing with the main bevel gear (2254), a connecting rod (2256) disposed inside the secondary bevel gear (2255) and rotating with it, and a rod head gear (2257) disposed at the outer end of the connecting rod (2256).

2. The coating process for producing energy storage lithium-ion batteries according to claim 1, characterized in that: The outer wall of the outer casing (201) has several linearly distributed fixing holes (2012) on the outer side of the front and rear ends of the adjustment groove (2011).

3. The coating process for producing energy storage lithium-ion batteries according to claim 2, characterized in that: The arc-shaped toothed plate (202) is welded and fixed to the inner wall of the arc-shaped chute (2010). The left and right ends of the central shaft of the rotating roller (203) are respectively rotatably connected to the inner walls of the square plates at the left and right ends of the fixed frame plate (210). The left and right ends of the central shaft of the guide roller (204) are fixedly connected to the roller end fixing plate (205) by bolts. The roller end fixing plate (205) is fixedly connected to the outer wall of the fixed frame plate (210) by bolts. The lifting cabinet (206) is fixedly connected to the bottom surface of the outer shell (201) by bolts.

4. The coating process for producing energy storage lithium-ion batteries according to claim 1, characterized in that: The fixed frame plate (210) has through slots (2101) on the outer side of the square plates at both ends near the front side; the fixed frame plate (2100) has square slots (2102) on the inner side of the square plates at both ends near the outer side for placing the slotted toothed plate (217). The partition plate (211) is integrally formed with the fixed frame plate (210), and the slotted toothed plate (217) is welded and fixed to the inner bottom surface of the square slot (2102).

5. The coating process for producing energy storage lithium-ion batteries according to claim 2, characterized in that: The dual-axis motor (212) is fixedly connected to the rear side wall of the fixed frame plate (210) by bolts. The connecting shaft (213) is coaxially connected to the output shaft of the dual-axis motor (212). The shaft end gear (214) is fixedly connected to the connecting shaft (213) by a snap pin. The sliding frame (215) is slidably connected to the inside of the arc-shaped slide groove (2010). Support frames (216) for supporting the connecting shaft (213) are fixedly connected to the rear side walls of both the left and right ends of the fixed frame plate (210) by bolts.

6. The coating process for producing energy storage lithium-ion batteries according to claim 1, characterized in that: The extension rod (2181) is snapped and fixed to the moving plate (2180). The extension rod (2181) is slidably connected to the inside of the partition plate (211). The docking plate (2182) is integrally formed with the extension rod (2181). The docking plate (2182) is fixedly connected with the lower template (220) and the upper template (222) by bolts. The rotating screw (2183) is rotatably connected to the rear side wall of the partition plate (211). The rod nut (2184) is integrally formed with the rotating screw (2183).

7. The coating process for producing energy storage lithium-ion batteries according to claim 1, characterized in that: The lower template (220) has a mixing chamber on its inner top surface for temporarily placing the coating material. A feeding channel connected to the mixing chamber is provided at the center of the rear side wall of the lower template (220). A sealing gasket (221) is placed between the lower template (220) and the upper template (222) to ensure sealing performance. The movable mold (223) is slidably connected to the interior of the upper template (222). Two spiral grooves with opposite directions and vertical connection are provided at both ends of the top horizontal plate of the movable mold (223).

8. The coating process for producing energy storage lithium-ion batteries according to claim 4, characterized in that: The top support (224) is fixedly connected to the top surface of the upper template (222) by bolts. Fixed protrusions (2240) are integrally formed on the inner top surfaces of the left and right ends of the top support (224). Connecting sliders (226) are fixedly connected between the outer walls of the left and right ends of the lower template (220) and the upper template (222) by screws. The connecting sliders (226) are slidably connected to the inside of the through groove (2101) of the plate.

9. The coating process for producing energy storage lithium-ion batteries according to claim 1, characterized in that: The connecting screw (2250) and the rotating rod (2252) are both rotatably connected to the inside of the plate top support (224). The rod body gear (2251) is fixedly connected to the connecting screw (2250) by a locking pin. The mating gear (2253) and the main bevel gear (2254) are both fixedly connected to the rotating rod (2252) by a locking pin. The mating gear (2253) and the rod body gear (2251) mesh with each other. The secondary bevel gear (2255) and the rod head gear (2257) are both fixedly connected to the connecting rod (2256) by a locking pin. The connecting rod (2256) is rotatably connected to the inside of the plate top support (224). The rod head gear (2257) meshes with the groove surface tooth plate (217).

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