Solid-state battery manufacturing apparatus and manufacturing method

Abstract

The application is suitable for the technical field of solid-state battery manufacturing, and provides a solid-state battery manufacturing device and manufacturing method, which comprises a lower oven, a middle oven is installed on the top of the lower oven, and an upper oven is fixed on the top of the middle oven. The solid-state battery manufacturing device and manufacturing method provided by the scheme realize longitudinal compact layout of the drying area by setting the upper oven, the middle oven and the lower oven to form three independent temperature zones, effectively reduce the floor area, stagger the coating and drying of the two sides of the carrier by the first coating structure and the second coating structure respectively, avoid damage of the wet coating caused by contact with the supporting roller, and realize synchronous linkage of the three-layer conveying rollers and the compression roller by constructing a unified power chain through the first gear, the second gear and the plurality of rubber belts, thereby avoiding structural redundancy and poor synchronicity.

Description

Technical Field

[0001] This invention belongs to the field of solid-state battery manufacturing technology, and particularly relates to a solid-state battery manufacturing equipment and manufacturing method. Background Technology

[0002] Solid-state batteries are energy storage devices that completely or partially replace the liquid electrolyte and separator in traditional lithium batteries with a solid electrolyte. The basic structure is a sandwich configuration of "negative electrode - solid electrolyte - positive electrode". According to the liquid component content, they can be divided into three types: semi-solid, quasi-solid, and all-solid. According to the electrochemical system, there are solid lithium batteries, solid sodium batteries, etc. Solid-state battery manufacturing is a highly specialized process system that revolves around the main line of "material processing - electrolyte film formation - electrode preparation - cell assembly - interface engineering - formation and capacity testing". The biggest difference from liquid batteries is that the core step has changed from liquid injection to solid electrolyte film formation. Film formation processes are divided into wet method (casting or coating the electrolyte solution on the positive electrode / mold and then evaporating the solvent to form a film, which is a mature process but has solvent residue and environmental problems), dry method (mixing electrolyte and binder and then directly forming by hot pressing or cold pressing, which is solvent-free but the film thickness is usually large), and vapor deposition method (magnetron sputtering, pulsed laser deposition, chemical vapor deposition, etc., which can prepare ultra-thin high-quality inorganic electrolyte films but the cost is extremely high).

[0003] Currently, in the solid-state battery production process, a coating machine is needed to apply the mixed electrode material to the carrier material, and then dry it. Existing drying equipment occupies a large area, and when the drying equipment is stacked, it will come into contact with the support shaft used to support the carrier material when entering and leaving the drying equipment, which can easily damage the electrode material on the surface of the carrier material. If the carrier material is only clamped and conveyed on both sides, the middle of the carrier material will sag due to gravity. At the same time, at the turning point of the carrier material, it is difficult to ensure that the edge of the carrier material is evenly stressed by clamping only, which will lead to problems such as wrinkles in the carrier material. Summary of the Invention

[0004] This invention provides a solid-state battery manufacturing equipment and manufacturing method, aiming to solve the problem mentioned in the background art that when producing solid-state batteries, it is difficult to ensure the stability of the electrode material on the load by stacking and drying equipment.

[0005] To solve the above problems, the present invention is implemented as follows: a solid-state battery manufacturing apparatus, comprising: a lower oven, a middle oven mounted on top of the lower oven, and an upper oven fixed on top of the middle oven; the lower, middle, and upper ovens cooperate to isolate a drying area coated with electrode material to be dried; a plurality of first conveying rollers respectively rotatably mounted in the upper and middle ovens for conveying and supporting the material; and a plurality of first conveying rollers respectively rotatably mounted in the upper and middle ovens for interacting with multiple... A pressure roller, which cooperates with the first conveying roller to clamp and stabilize the edge of the material, is provided; a first coating structure and a second coating structure are respectively provided at the feed inlets of the upper and middle drying ovens for coating both sides of the material; a second conveying roller is rotatably installed in the lower drying oven and arranged in a group, which is used to support and convey the material drying on the surface of the electrode material; a power structure is provided between the lower, middle and upper drying ovens to drive the first conveying roller, the pressure roller and the second conveying roller to rotate in order to convey the material.

[0006] Preferably, the power structure includes multiple first rubber belts respectively disposed on the lower, middle, and upper ovens. The first rubber belts on the upper oven are sleeved around multiple first conveyor rollers and pressure rollers located inside the upper oven. The first rubber belts on the middle oven are sleeved around multiple first conveyor rollers and pressure rollers located inside the middle oven. The first rubber belts on the lower oven are sleeved between multiple second conveyor rollers located inside the lower oven. Multiple limiting shafts respectively rotate on the lower, middle, and upper ovens, and the multiple limiting shafts respectively contact the multiple first rubber belts to increase the transmission stability of the first rubber belts. A first rotating shaft on the upper drying oven, and a first gear fixed on the first rotating shaft and any one of the first conveying rollers located on the upper drying oven, the two first gears meshing for transmission; a second rubber belt sleeved on the first rotating shaft and any one of the pressure rollers located on the middle drying oven; a second rotating shaft rotatably mounted on the middle drying oven, and a second gear fixed on the second rotating shaft and any one of the first conveying rollers located on the middle drying oven, the two second gears meshing for transmission; a third rubber belt sleeved on the second rotating shaft and any one of the second conveying rollers for transmission; and a motor fixed on the upper drying oven, the output shaft of the motor being connected to any one of the pressure rollers via a coupling.

[0007] Preferably, the lower oven, the middle oven, and the upper oven are each equipped with an extension box on both sides to reduce the amount of hot air emitted. The lower oven, the middle oven, the upper oven, and the extension box are each provided with an opening slit on both sides to provide a material inlet and outlet channel. A fixed frame is fixed on the extension box, and multiple guide rollers for guiding the material conveying direction are rotatably installed on the fixed frame.

[0008] Preferably, the first coating structure includes a first storage tank fixed on the fixed frame, a first stirring rod rotatably installed in the first storage tank, a first discharge pipe installed on the first storage tank via a first pump, and a first coating roller rotatably installed on the first storage tank. The second coating structure includes a second storage tank, a second stirring rod, a second pump, a second discharge pipe, and a second coating roller. The second coating structure has the same structure as the first coating structure. The first stirring rod and the first coating roller are fitted with a fourth rubber belt for transmission. The first coating roller and the second stirring rod are fitted with a fifth rubber belt for transmission. The second stirring rod and the second coating roller are fitted with a sixth rubber belt for transmission. The second coating roller and any one of the first conveying rollers are fitted with a seventh rubber belt for transmission.

[0009] Preferably, the bottom of the first storage box and the second storage box are respectively provided with a first protective structure and a second protective structure for wind protection. The first protective structure includes a fixing plate fixed on the first storage box, a first spring installed on the fixing plate, a pressure plate installed on the first spring, a plurality of limiting rods installed on the first discharge pipe, and a windproof plate sleeved on the plurality of limiting rods for wind protection. The pressure plate sleeved on the plurality of limiting rods is used to compress and stabilize the windproof plate.

[0010] Preferably, a fan is installed on the fixed frame, a first heating box is fixed on the lower oven, the first heating box is connected to the exhaust end of the fan, a second heating box is installed on the middle oven, a first connecting pipe connected to the second heating box is installed on the lower oven, a third heating box is installed on the upper oven, a second connecting pipe connected to the third heating box is installed on the middle oven, and multiple exhaust pipes are fixed inside the lower, middle, and upper ovens. The multiple exhaust pipes are respectively connected to the first, second, and third heating boxes. The first connecting pipe and the second connecting pipe cooperate to realize the graded recovery and utilization of heat, and the second heating box cooperates with the third heating box to increase the adjustability of the gradient temperature.

[0011] Preferably, both the first connecting pipe and the second connecting pipe are equipped with dehumidification boxes, both dehumidification boxes are filled with PTFE glass fiber sintered membrane filter material, and both dehumidification boxes can be detachably installed with a blocking plate for sealing the dehumidification box, and a sealing gasket that contacts the outer wall of the dehumidification box is installed on the blocking plate.

[0012] Preferably, both the first and second conveying rollers are fitted with an outer expansion cylinder by bolts, and the pressure roller is fitted with a pressure cylinder. Multiple outer expansion cylinders and pressure cylinders are fitted with anti-slip pads. The exhaust pipes located in the lower drying oven are arranged in groups and are located above and below the second conveying roller, respectively, for synchronously drying the electrode materials located above and below the load.

[0013] Preferably, temperature sensors are provided in the lower, middle and upper ovens, and an exhaust pipe is provided on the top of the third heating box to provide an exhaust gas conveying channel. Insulation layers are provided in the lower, middle, and upper ovens, as well as the first and second storage boxes for heat insulation.

[0014] This invention also discloses a method for manufacturing a solid-state battery, comprising the following steps: Step 1: Electrode material preparation; active materials (such as solid electrolytes, positive / negative electrode materials), conductive agents, and binders are mixed in proportion, and an appropriate amount of solvent is added and stirred evenly to form a slurry. The slurry is then vacuum stirred to remove bubbles, ensuring that there are no bubbles. Step 2: Material conveying; the material carrier (copper foil / aluminum foil current collector, etc.) enters the solid-state battery manufacturing equipment through the opening of the extension box. The motor drives the pressure roller to rotate, and through the limit shaft, the first rubber belt, the first rotating shaft, the first gear, the second rubber belt, the second rotating shaft, the second gear, and the third rubber belt, the first conveying roller, the pressure roller, and the second conveying roller are driven to rotate to convey the material. The material carrier is guided by the guide rollers on both sides and passes through the first coating structure, the upper oven, the second coating structure, the middle oven, and the lower oven in sequence. Step 3: Coating and drying; during coating, the first discharge pipe sends the slurry in the first storage tank to the first coating roller through the first pump to coat the upper surface of the material carrier. During drying, the material enters the upper oven and is output. The surface has been initially dried and will not stick to the subsequent guide rollers. When passing through the second coating structure, the slurry is coated onto the other surface of the material carrier via the second coating roller. The material carrier enters the middle drying oven, and after being output, it is guided by the guide rollers into the lower drying oven for centralized drying. The drying heat source comes from the first, second, and third heating ovens, forming a temperature gradient, with the upper layer having the lowest temperature to prevent cracking caused by rapid evaporation. During the process, hot air is evenly sprayed out through the exhaust pipe, drying the side carrying the material. During drying, the hot air sequentially passes through the lower layer... The process involves several steps: 1. Drying oven, 2. First connecting pipe, 3. Middle drying oven, 4. Second connecting pipe, and 5. Top drying oven; 6. Rolling and slitting: The dried electrode sheets are compacted by a roller press to increase energy density, and then slid into electrode sheets of the required size; 7. Cell assembly: The positive electrode sheet, solid electrolyte membrane, and negative electrode sheet are stacked in a sandwich configuration of negative electrode-solid electrolyte-positive electrode and hot-pressed into contact; 8. Formation and capacity testing: Solid-state battery formation is performed directly, followed by the first charge-discharge activation, capacity testing, and grading by capacity and internal resistance before shipment.

[0015] Compared with related technologies, the solid-state battery manufacturing equipment and method provided by the present invention have the following beneficial effects: Compared with existing technologies, the solid-state battery manufacturing equipment and method provided in this solution form three independent temperature zones by setting up an upper oven, a middle oven, and a lower oven, achieving a compact vertical layout of the drying area and effectively reducing the floor space. By having the first coating structure and the second coating structure apply coatings and dry them separately on both sides of the material, it avoids damage to the support rollers from contact between the undried coating and the material. The motor constructs a unified power chain through the first gear, the second gear, and multiple rubber belts, realizing synchronous linkage between the three layers of conveying rollers and pressure rollers, avoiding structural redundancy and poor synchronization. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the main cross-sectional structure of the solid-state battery manufacturing equipment provided by the present invention; Figure 2 This is a three-dimensional structural diagram of the lower oven, middle oven, and upper oven in this invention; Figure 3 This is a three-dimensional cross-sectional view of the lower oven, middle oven, and upper oven in this invention. Figure 4 This is a schematic diagram of the main structure of the solid-state battery manufacturing equipment provided by the present invention; Figure 5 This is a cross-sectional view of the filter structure in this invention; Figure 6 for Figure 1 An enlarged structural diagram of part A shown in the figure; Figure 7 for Figure 3 An enlarged structural diagram of part B shown in the figure; Figure 8 for Figure 2 An enlarged structural diagram of section C shown in the figure; Figure 9 This is a three-dimensional cross-sectional view of the first coating roller in this invention; Figure 10 This is a cross-sectional view of the cooling box in this invention.

[0017] Reference numerals: 1. Lower oven; 2. Middle oven; 3. Upper oven; 4. First conveyor roller; 5. Pressure roller; 6. Second conveyor roller; 7. First rubber belt; 8. Limiting shaft; 9. First rotating shaft; 10. First gear; 11. Second rubber belt; 12. Second gear; 13. Third rubber belt; 14. Opening slit; 15. Extension box; 16. Guide roller; 17. First storage box; 18. First stirring rod; 19. First discharge pipe; 20. First coating roller; 21. Fixing plate; 22. First spring; 23. Pressure plate; 24. Limiting rod; 25. Baffle plate; 26. Second storage box; 27. Second stirring rod 28. Stirring rod; 29. ​​Fourth rubber belt; 30. Fifth rubber belt; 31. Sixth rubber belt; 32. Seventh rubber belt; 33. Fixing frame; 34. Fan; 35. First heating box; 36. Second heating box; 37. First connecting pipe; 38. Dehumidification box; 39. Third heating box; 40. Second connecting pipe; 41. Exhaust pipe; 42. Filter structure; 43. T-connector; 44. Outer shell; 45. Ultrafiltration membrane frame; 46. Air pump; 47. Filter box; 48. Cooling box; 49. Water pump; 50. Drain pipe; 51. Support pipe; 52. Support cylinder; 53. Coating cylinder; 54. Rotary connector; 55. Motor. Detailed Implementation

[0018] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0019] This invention provides a solid-state battery manufacturing apparatus and manufacturing method, such as... Figure 1-10 As shown, the solid-state battery manufacturing equipment includes: a lower oven 1, a middle oven 2 mounted on top of the lower oven 1, an upper oven 1 fixed on top of the middle oven 2, the lower oven 1, middle oven 2, and upper oven 3 cooperating to isolate the drying area coated with electrode material to be dried; multiple first conveying rollers 4 respectively rotatably mounted in the upper oven 3 and the middle oven 2 for conveying and supporting the material; and multiple first conveying rollers 4 respectively rotatably mounted in the upper oven 3 and the middle oven 2 for interacting with the multiple first conveying rollers 4. The equipment includes a pressure roller 5 for clamping and stabilizing the edge of the material; a first coating structure and a second coating structure respectively disposed at the feed inlets of the upper oven 3 and the middle oven 2 for coating both sides of the material; a second conveying roller 6 rotatably installed in the lower oven 1 and arranged in a group, the second conveying roller 6 being used to support and convey the material drying on the surface of the electrode material; and a power structure disposed between the lower oven 1, the middle oven 2 and the upper oven 3 for driving the first conveying roller 4, the pressure roller 5 and the second conveying roller 6 to rotate in order to convey the material.

[0020] In this embodiment, during use, the material mixed with electrode material is first fed into the equipment. The material first enters the feed inlet of the upper oven 3. The first coating structure performs coating operation on the upper surface of the material. As the material is conveyed, the second coating structure performs coating operation on the lower surface of the material simultaneously. At the same time, the material is gradually fed into the upper oven 3 and the middle oven 2 as the first conveying roller 4 rotates (one side is coated and dried first, then the other side is coated and dried). Meanwhile, the pressure roller 5 and the first conveying roller 4 work together to clamp the edge of the material, so that the material remains flat and the edge position is stable during the transmission process. The upper oven 3, the middle oven 2 and the lower oven 1 divide the drying area into three independent temperature zones. The material passes through different temperature zones in each oven to complete gradient drying. The material that has been preliminarily dried on both sides enters the lower oven 1 from the middle oven 2. When it is output, the surface of the electrode material is dry. Throughout the process, the power structure synchronously drives the first conveying roller 4, the pressure roller 5 and the second conveying roller 6 to operate. By dividing the drying area into three independent temperature zones—upper oven 3, middle oven 2, and lower oven 1—the material passes through different drying stages sequentially during transport, effectively avoiding the large footprint problem of traditional equipment and achieving a compact vertical layout of the drying process. The upper and lower clamping structure of the pressure roller 5 and the first conveying roller 4 solves the problem of uneven force on the edge of the material causing wrinkles when clamped only at the edge, and also eliminates the defect of the material sagging in the middle due to gravity, ensuring the uniformity and integrity of the electrode material coating. By first coating and drying one side, then continuously coating and drying the other side, and finally curing and drying, the problem of the coating surface being damaged when the undried coating comes into direct contact with the support roller is solved.

[0021] In a further preferred embodiment of the present invention, the power structure includes a plurality of first rubber belts 7 respectively disposed on the lower oven 1, the middle oven 2, and the upper oven 3. The first rubber belts 7 on the upper oven 3 are sleeved around a plurality of first conveying rollers 4 and pressure rollers 5 located inside the upper oven 3. The first rubber belts 7 on the middle oven 2 are sleeved around a plurality of first conveying rollers 4 and pressure rollers 5 located inside the middle oven 2. The first rubber belts 7 on the lower oven 1 are sleeved between a plurality of second conveying rollers 6 located inside the lower oven 1. A plurality of limiting shafts 8 respectively rotate on the lower oven 1, the middle oven 2, and the upper oven 3. The plurality of limiting shafts 8 respectively contact the plurality of first rubber belts 7 to increase the transmission stability of the first rubber belts 7. A first rotating shaft 9 is installed on the upper oven 3. A first gear 10 is fixed on the first rotating shaft 9 and any one of the first conveying rollers 4 located on the upper oven 3. The two first gears 10 mesh for transmission. A second rubber belt 11 is sleeved on the first rotating shaft 9 and any one of the pressure rollers 5 located on the middle oven 2. A second rotating shaft is rotatably installed on the middle oven 2. A second gear 12 is fixed on the second rotating shaft and any one of the first conveying rollers 4 located on the middle oven 2. The two second gears 12 mesh for transmission. A third rubber belt 13 is sleeved on the second rotating shaft and any one of the second conveying rollers 6 for transmission. A motor 54 is fixed on the upper oven 3. The output shaft of the motor 54 is connected to any one of the pressure rollers 5 through a coupling.

[0022] In this embodiment, when the equipment is running, the motor 54 starts, and its output shaft drives any one of the pressure rollers 5 in the upper oven 3 to rotate through the coupling. Through the first rubber belt 7 sleeved on it, it drives multiple first conveyor rollers 4 and pressure rollers 5 in the upper oven 3 to rotate. At the same time, since the first gear 10 meshes with the first gear 10 fixed on the first rotating shaft 9, the first rotating shaft 9 rotates synchronously. The first rotating shaft 9 transmits power to any one of the pressure rollers 5 in the middle oven 2 through the second rubber belt 11, so that the first conveyor rollers 4 and pressure rollers 5 in the middle oven 2 rotate. Based on the same transmission principle, it drives multiple second conveyor rollers 6 to rotate. The motor 54 directly drives the pressure roller 5 via a coupling, and then the power is transmitted step by step to the conveyor rollers and pressure rollers 5 in each layer of the oven through gear meshing and multiple rubber belts. This achieves unified linkage of the first conveyor roller 4, pressure roller 5 and second conveyor roller 6 in the three-layer oven, avoiding the structural redundancy and poor synchronization caused by setting independent drive sources for each layer.

[0023] In a further preferred embodiment of the present invention, extension boxes 15 for reducing heat emission are installed on both sides of the lower oven 1, the middle oven 2, and the upper oven 3. Openings 14 are provided on both sides of the lower oven 1, the middle oven 2, the upper oven 3, and the extension boxes 15 to provide material inlet and outlet channels. A fixing frame 32 is fixed on the extension box 15, and a plurality of guide rollers 16 for guiding the material conveying direction are rotatably installed on the fixing frame 32.

[0024] In this embodiment, when the equipment is running, the material passes through the upper oven 3, the middle oven 2 and the lower oven 1 in sequence to complete the drying and coating process. The openings 14 on both sides of each oven serve as the entry and exit channels for the material. The material enters or leaves the corresponding oven through these openings. After entering the extension box 15 from the opening 14, the material passes through multiple guide rollers 16 in sequence. After changing the conveying direction, it enters the next conveying path. The guide rollers 16 rotate as the material passes through, and perform real-time correction and guidance on the movement trajectory of the material. By setting extension boxes 15 on both sides of the lower oven 1, middle oven 2 and upper oven 3, the opening slit 14 area for material entry and exit is effectively enclosed and sealed, which greatly reduces the amount of hot air emitted from the opening slit 14 in the oven, reduces heat loss, helps maintain the stability of the temperature field in each oven layer, and improves drying efficiency and uniformity. By rotating and installing multiple guide rollers 16 on the fixed frame 32, continuous directional guidance is provided for the material to enter and exit the oven, so that the material can smoothly turn after entering the extension box 15 through the opening slit 14, avoiding the material from shifting, wrinkling or edge scraping due to sudden change in direction when entering and exiting the oven.

[0025] In a further preferred embodiment of the present invention, the first coating structure includes a first storage tank 17 fixed on the fixed frame 32, a first stirring rod 18 rotatably installed in the first storage tank 17, a first discharge pipe 19 installed on the first storage tank 17 via a first pump, and a first coating roller 20 rotatably installed on the first storage tank 17. The second coating structure includes a second storage tank 26, a second stirring rod 27, a second pump, a second discharge pipe, and a second coating roller. The second coating structure has the same structure as the first coating structure. The first stirring rod 18 and the first coating roller 20 are fitted with a fourth rubber belt 28 for transmission. The first coating roller 20 and the second stirring rod 27 are fitted with a fifth rubber belt 29 for transmission. The second stirring rod 27 and the second coating roller are fitted with a sixth rubber belt 30 for transmission. The second coating roller and any one of the first conveying rollers 4 are fitted with a seventh rubber belt 31 for transmission.

[0026] In this embodiment, during equipment operation, the first coating structure and the second coating structure work synchronously, respectively coating the upper and lower surfaces of the material. The first discharge pipe 19 extracts the coating from the first storage tank 17 through the first pump and delivers it to the surface of the first coating roller 20. The first coating roller 20 contacts the upper surface of the material as the material passes by and achieves coating transfer. After the single-sided coating is dried by the upper oven 3, the second discharge pipe in the second coating structure extracts the coating from the second storage tank 26 through the second pump and delivers it to the surface of the second coating roller. The second coating roller contacts the lower surface of the material to complete the coating of the lower surface. During the operation, the two stirring rods rotate continuously in the two storage tanks to stir the coating in the tanks and prevent the coating from settling or clumping. A transmission chain from the first conveying roller 4 to the first coating roller 20 is constructed by the fourth rubber belt 28, the fifth rubber belt 29, the sixth rubber belt 30, and the seventh rubber belt 31. This allows the coating, mixing, and material conveying of the first and second coating structures to be driven by the same power source, eliminating the need for separate drive electrical appliances for mixing and conveying. This simplifies the power structure and reduces equipment manufacturing costs and failure rates. By setting up two coating structures to coat both sides of the material at different processing stages, it prevents electrode material from dripping due to gravity and also prevents undried electrode material from directly contacting the support roller and being damaged by it.

[0027] In a further preferred embodiment of the present invention, the bottoms of the first storage box 17 and the second storage box 26 are respectively provided with a first protective structure and a second protective structure for wind protection. The first protective structure includes a fixing plate 21 fixed on the first storage box 17, a first spring 22 installed on the fixing plate 21, a pressure plate 23 installed on the first spring 22, a plurality of limiting rods 24 installed on the first discharge pipe 19, and a windbreak plate 25 sleeved on the plurality of limiting rods 24 for wind protection. The pressure plate 23 is sleeved on the plurality of limiting rods 24 for pressing and stabilizing the windbreak plate 25.

[0028] In this embodiment, during equipment operation, two protective structures protect the discharge ends of the two discharge pipes and the two coating rollers respectively. The pressure plate 23 is sleeved on the outside of multiple limit rods 24, forming a continuous downward elastic compression on the baffle plate 25. When the external airflow (hot air discharged from the oven) blows towards the coating roller, the airflow first impacts the outer surface of the baffle plate 25 and is blocked by the baffle plate 25 to prevent the electrode material on the coating roller from drying quickly. By setting up the first protective structure and the second protective structure, the airflow can be prevented from blowing directly onto the paint liquid, causing a small amount of electrode material on the first paint roller 20 and the second paint roller to be dried quickly, thereby increasing the quality of the paint.

[0029] In a further preferred embodiment of the present invention, a fan 33 is installed on the fixing frame 32, a first heating box 34 is fixed on the lower oven 1, the first heating box 34 is connected to the exhaust end of the fan 33, a second heating box 35 is installed on the middle oven 2, a first connecting pipe 36 connected to the second heating box 35 is installed on the lower oven 1, a third heating box 38 is installed on the upper oven 3, a second connecting pipe 39 connected to the third heating box 38 is installed on the middle oven 2, and a plurality of exhaust pipes 40 are fixed in the lower oven 1, the middle oven 2 and the upper oven 3, respectively. The plurality of exhaust pipes 40 are respectively connected to the first heating box 34, the second heating box 35 and the third heating box 38. The first connecting pipe 36 cooperates with the second connecting pipe 39 to realize the step-by-step recovery and utilization of heat, and the second heating box 35 cooperates with the third heating box 38 to increase the adjustability of the gradient temperature.

[0030] In this embodiment, when the equipment is running, the fan 33 starts to operate. According to the airflow direction, after the first heating box 34 heats the air, the hot air enters the lower oven 1 through multiple exhaust pipes 40 connected to the first heating box 34, providing a heat source for drying the upper and lower surfaces of the material. The second heating box 35 installed on the middle oven 2 heats the exhaust gas from the lower oven 3 (supplementing heat; if the temperature is sufficient, no further supplementation is needed). The heated hot air enters the middle oven 2 through the exhaust pipe 40 connected to the second heating box 35. The third heating box 38 installed on the upper oven 3 heats the hot air output from the middle oven 2. The heated hot air enters the upper oven 3 through the exhaust pipe 40 connected to the third heating box 38, providing a heat source for drying the material on the upper surface of the material (the temperature of the hot air gradually decreases as the flow distance increases; when the coating is fresh, the exhaust gas temperature is used for drying to prevent cracking caused by rapid evaporation of moisture; the temperature of the middle oven 2 is higher than that of the upper oven 3 because the material has already been preheated by the upper oven 3). By cooperating with the fan 33, the first heating box 34, the second heating box 35, and the third heating box 38, a positive heat supply is constructed from the lower oven 1 to the upper oven 3, enabling the heat to be recovered and utilized in stages between the three ovens. This significantly reduces the ineffective loss of heat energy and improves the overall heat energy utilization efficiency. The residual heat after the lower oven 1 is used is transferred step by step to the middle oven 2 and the upper oven 3 through the first connecting pipe 36 and the second connecting pipe 39, reducing the consumption of additional heating energy. The second heating box 35 and the third heating box 38 each have independent temperature control, allowing the temperature gradient in the three ovens to be flexibly adjusted.

[0031] In a further preferred embodiment of the present invention, both the first connecting pipe 36 and the second connecting pipe 39 are provided with dehumidification boxes 37, both dehumidification boxes 37 are filled with PTFE glass fiber sintered membrane filter material, and both dehumidification boxes 37 can be detachably installed with a blocking plate for sealing the dehumidification box 37, and a sealing gasket in contact with the outer wall of the dehumidification box 37 is installed on the blocking plate.

[0032] In this embodiment, during equipment operation, hot air flows between the three ovens through the first connecting pipe 36 and the second connecting pipe 39. After entering the dehumidification box 37, the hot air comes into full contact with the PTFE glass fiber sintered membrane filter material filled in the box. The water vapor carried in the hot air is adsorbed and intercepted by the filter material. The dried hot air continues to flow along the pipeline to the next heating box. When the adsorption capacity of the filter material decreases after a period of use, the operator removes the blockage plate from the dehumidification box 37, takes out the saturated PTFE glass fiber sintered membrane filter material for replacement or regeneration, and reinstalls the blockage plate after reinstalling the new filter material. By setting up dehumidification chambers 37 filled with PTFE glass fiber sintered membrane filter material on the first connecting pipe 36 and the second connecting pipe 39 respectively, forced dehumidification can be implemented on the return hot air before it enters the next stage heating chamber. This effectively removes the water vapor carried in the hot air, preventing the water vapor from condensing on the material surface after flowing back to the upper drying chamber 3 and the middle drying chamber 2 with the hot air. This avoids the water film from dissolving or wetting the coated electrode material, ensuring the integrity and adhesion quality of the electrode coating during the multi-layer drying process.

[0033] In a further preferred embodiment of the present invention, an outer expansion cylinder is fixedly sleeved on the outside of the first conveying roller 4 and the second conveying roller 6 by bolts, and a pressure cylinder is rotatably sleeved on the outside of the pressure roller 5. Anti-slip pads are fixedly sleeved on the outside of the multiple outer expansion cylinders and pressure cylinders. The exhaust pipes 40 located in the lower drying oven 1 are arranged in groups and are respectively located above and below the second conveying roller 6 for synchronously drying the electrode materials located above and below the load.

[0034] In this embodiment, when the equipment is running, the first conveying roller 4, the pressure roller 5, and the second conveying roller 6 are all in a continuous rotating state. The pressure cylinder only has a clamping function. When the dried material enters the lower drying oven 1 and is received and conveyed by the second conveying roller 6, the exhaust pipe 40 sprays hot air upwards and downwards at the same time. The electrode material on the upper surface of the material receives hot air from the upper exhaust pipe 40 for drying, and the electrode material on the lower surface of the material receives hot air from the lower exhaust pipe 40 for drying at the same time. The upper and lower surfaces complete the final drying process synchronously in the same conveying section. By installing outer expansion cylinders on the outer walls of both the first conveying roller 4 and the second conveying roller 6 and fixing anti-slip pads on the outside of the outer expansion cylinders, and by rotating and installing pressure cylinders on the outside of the pressure roller 5 and installing anti-slip pads, the effective contact area between the roller body and the material is increased. The high friction provided by the anti-slip pad material makes it less likely for the material to slip or deviate during the conveying process of each layer of the drying oven. By setting the exhaust pipes 40 in groups above and below the second conveying roller 6, the synchronous drying of the electrode materials on both the upper and lower sides of the material is achieved, shortening the drying cycle.

[0035] In a further preferred embodiment of the present invention, temperature sensors are provided in the lower oven 1, the middle oven 2 and the upper oven 3, and an exhaust pipe for providing an exhaust gas conveying channel is provided on the top of the third heating box 38. Insulation layers are provided in the lower oven 1, the middle oven 2, the upper oven 3, the first storage box 17 and the second storage box 26 for heat insulation.

[0036] In this embodiment, during equipment operation, temperature sensors in the lower oven 1, middle oven 2, and upper oven 3 continuously monitor the real-time temperature inside their respective ovens and feed the temperature signals back to the control system. This allows the heating process in each oven to be dynamically adjusted according to the actual temperature, maintaining the stability of the set temperature. After the third heating box 38 finishes heating the hot gas, the remaining exhaust gas is discharged through the exhaust pipe at the top of the third heating box 38 and then discharged through the external conveying channel, completing the exhaust gas discharge of the entire drying circuit (the exhaust pipe can also be connected to external equipment to recover the remaining heat). By installing temperature sensors in the lower oven 1, middle oven 2, and upper oven 3, real-time monitoring and closed-loop control of the temperature of the three ovens are achieved. This ensures that the drying temperature of each layer can be maintained within the set range according to the process requirements of the electrode material, avoiding uneven drying or over-drying of the electrode material due to temperature fluctuations. This improves the consistency and controllability of the drying quality. The exhaust pipe at the top of the third heating box 38 provides a dedicated exhaust channel for the drying circuit, allowing the hot gas after use to be discharged from the outside of the equipment in an orderly manner, avoiding the accumulation of exhaust gas inside the equipment that could cause temperature field disturbances or excessive humidity.

[0037] This invention also discloses a method for manufacturing a solid-state battery, comprising the following steps: Step 1: Electrode material preparation; Active materials (such as solid electrolytes, positive / negative electrode materials), conductive agents, and binders are mixed in proportion, and an appropriate amount of solvent is added and stirred evenly to form a slurry. The slurry is then vacuum stirred to remove bubbles, ensuring no air bubbles remain. Step 2: Material conveying; The material carrier (copper foil / aluminum foil current collector, etc.) enters the solid-state battery manufacturing equipment through the opening slit 14 of the extension box 15. The motor 54 drives the pressure roller 5 to rotate, passing through the limiting shaft 8, the first rubber belt 7, the first rotating shaft 9, the first gear 10, the second rubber belt 11, the second rotating shaft, and the first... The second gear 12 and the third rubber belt 13 drive the first conveyor roller 4, the pressure roller 5, and the second conveyor roller 6 to rotate, conveying the material. The material is guided by the guide rollers 16 on both sides and passes through the first coating structure, the upper oven 3, the second coating structure, the middle oven 2, and the lower oven 1 in sequence. The third step is coating and drying. During coating, the first discharge pipe 19 sends the slurry in the first storage tank 17 to the first coating roller 20 through the first pump to coat the upper surface of the material. During drying, the material enters the upper oven 3 and is initially dried after being output. The slurry will not stick to the subsequent guide roller 16. When passing through the second coating structure, the slurry is coated on the other surface of the material carrier by the second coating roller. The material carrier enters the middle drying oven 2, and after being output, it is guided by the guide roller 16 into the lower drying oven 1 for centralized drying. The drying heat source comes from the first heating box 34, the second heating box 35, and the third heating box 38, forming a temperature gradient. The upper layer has the lowest temperature to prevent cracking caused by rapid evaporation. During the process, hot air is evenly sprayed out through the exhaust pipe 40 to dry the side with the material carrier. During drying, the hot air passes through the lower layer in sequence. The oven consists of oven 1, first connecting pipe 36, middle oven 2, second connecting pipe 39, and upper oven 3; Step 4: Rolling and slitting; The dried electrode sheets are compacted by a roller press to improve energy density, and then slit into electrode sheets of the required size; Step 5: Cell assembly; The positive electrode sheet, solid electrolyte membrane, and negative electrode sheet are stacked in a sandwich configuration of negative electrode-solid electrolyte-positive electrode and hot-pressed into contact; Step 6: Formation and capacity testing; Solid-state battery formation is performed directly, the first charge and discharge activation is applied, capacity testing is conducted, and the cells are graded according to capacity and internal resistance to complete the shipment.

[0038] In this embodiment, the first conveying roller 4, the pressure roller 5, and the second conveying roller 6 are driven to operate synchronously in the three-layer drying oven through a unified power chain constructed by the motor 54 via gear meshing and multiple rubber belts. This achieves continuous conveying of the material from coating to drying, eliminating the problem of electrode material being scratched and damaged when the material is transferred between different processes in traditional equipment. The first coating structure and the second coating structure are linked through the transmission chain from the fourth rubber belt 28 to the seventh rubber belt 31. The stirring and coating are driven by the same power source, ensuring continuous stirring of the slurry during the coating process and avoiding coating defects caused by coating sedimentation or uneven viscosity. By staggering the coating drying process on both sides of the material, it is possible not only to prevent damage during material conveying but also to ensure conveying stability.

[0039] To further improve the performance of this device, in addition to the above-mentioned solutions, this solution also includes the following embodiments: In another embodiment of the present invention, a filter structure 41 is installed on the fixed frame 32. The filter structure 41 is connected to the air inlet of the fan 33 and is used to filter the air entering the lower oven 1, the middle oven 2 and the upper oven 3. The filter structure 41 includes a housing 43 fixed on the fixed frame 32, the housing 43 being connected to the air inlet of the fan 33, an ultrafiltration membrane frame 44 installed inside the housing 43, an air pump 45 fixed on the top of the housing 43, the air pump 45 cooperating with the ultrafiltration membrane frame 44 to reduce the oxygen content in the gas using negative pressure, and a filter box 46 detachably installed on the housing 43 for filtering dust impurities.

[0040] In this embodiment, when the equipment is running, the fan 33 starts, and its air inlet draws air from the external environment through the filter structure 41. The external air first enters the filter box 46, which performs preliminary interception and filtration of dust and impurity particles in the air. The cleaned air enters the interior of the outer shell 43, and the air pump 45 starts to operate. It works with the ultrafiltration membrane frame 44 to form a negative pressure environment in the cavity of the outer shell 43. Under the action of negative pressure, the air is forced to pass through the ultrafiltration membrane frame 44. The ultrafiltration membrane frame 44 uses its membrane pores to selectively retain oxygen molecules in the gas, so that the oxygen content of the air after passing through the ultrafiltration membrane frame 44 is greatly reduced. The clean low-oxygen air after double filtration and deoxygenation treatment is output from the outer shell 43 to the air inlet of the fan 33. The fan 33 pressurizes the air and sends it into the first heating box 34. It is sprayed out through the exhaust pipes 40 in each layer of the drying box to dry the electrode material on the carrier. By setting the filter structure 41 at the air inlet of the fan 33, a dual purification barrier of dust filtration and oxygen content reduction is constructed. The filter box 46 performs primary interception of dust impurities in the air entering the system, effectively preventing dust particles from being deposited on the electrode coating on the material surface after entering each layer of the drying oven with the hot air. This avoids coating defects and the risk of short circuits in the battery caused by impurity embedding. The air pump 45, together with the ultrafiltration membrane frame 44, selectively intercepts oxygen molecules in the air under negative pressure, which greatly reduces the oxygen content of the air entering the drying oven. For the oxygen-sensitive active materials contained in the solid-state battery electrode materials, the low-oxygen drying environment effectively inhibits the oxidation side reaction of the electrode materials during the high-temperature drying process, ensuring the chemical stability and electrochemical performance of the electrode materials.

[0041] In another embodiment of the present invention, a three-way pipe 42 is installed on the fixing frame 32, and the two air inlets of the three-way pipe 42 extend to one side of the first coating structure and the second coating structure respectively for drawing hot air. The exhaust port of the three-way pipe 42 is connected to the filter box 46.

[0042] In this embodiment, during the operation of the equipment, when the two coating structures are coating the upper surface of the material, the hot air generated in the surrounding environment is continuously drawn out by the air inlet of the three-way pipe 42 and uniformly transported to the filter box 46 through the exhaust port of the three-way pipe 42. The airflow generated by the coating areas of the first and second coating structures is concentrated and drawn together by the three-way pipe 42, which reduces the impact of hot air on the electrode material. The two air inlets of the three-way pipe 42 correspond to the coating areas on the upper and lower sides respectively, realizing the synchronous collection of exhaust gas during double-sided coating.

[0043] In another embodiment of the present invention, the first paint roller 20 includes two support pipes 50 rotatably mounted on the first storage box 17, a support cylinder 51 fixed between the two support pipes 50, a paint cylinder 52 sleeved outside the support cylinder 51, and a drain pipe 49 respectively mounted on the two support pipes 50 via a rotary connector 53. The second paint roller has the same structure as the first paint roller 20.

[0044] In this embodiment, when the equipment is running, the two paint rollers rotate as the material passes by, the outer wall of the paint cylinder 52 continuously contacts the surface of the material to apply the paint, and the rotary connector 53 enables the drain pipe 49 to be relatively stable and not restricted by the entanglement of the pipeline when the support pipe 50 rotates. By adopting a split structure of support pipe 50, support cylinder 51, paint cylinder 52 and drain pipe 49, the cooling and heat dissipation of the paint roller is separated from the paint bearing function. The drain pipe 49 is installed on the two support pipes 50 respectively through a rotary connector 53, so that the drain pipe 49 and the rotating support pipe 50 are sealed and rotated.

[0045] In another embodiment of the present invention, two cooling boxes 47 are installed on the fixing frame 32. The drain pipes 49 located on the first paint roller 20 and the second paint roller extend into the two cooling boxes 47 respectively. Each of the two cooling boxes 47 is equipped with a water pump 48. The drain ends of the two water pumps 48 are respectively connected to any two drain pipes 49. The two drain pipes 49 are respectively connected to the first paint roller 20 and the second paint roller.

[0046] In this embodiment, when the equipment is running, the first coating roller 20 and the second coating roller rotate continuously on their respective support pipes 50. The drain pipes 49 on the first coating roller 20 and the second coating roller deliver cooling liquid to the coating rollers and circulate it to the cooling tank 47 through two water pumps 48 to prevent the electrode material from drying out due to high temperature. By setting two cooling boxes 47 on the fixed frame 32 and cooperating with the water pump 48, a slurry circulation cooling circuit for the coating roller is constructed. This prevents the slurry from staying on the coating cylinder 52 for a long time, which would cause the viscosity to increase or the solvent to evaporate more rapidly due to heat. This improves the coating accuracy and coating uniformity. The two cooling boxes 47 correspond to the first coating roller 20 and the second coating roller, respectively, realizing independent cooling circulation for the upper and lower coating systems and avoiding mutual interference between the temperatures of the upper and lower slurry.

[0047] In summary, compared with related technologies, by setting up an upper drying oven 3, a middle drying oven 2, and a lower drying oven 1 to form three independent temperature zones, a compact vertical layout of the drying area is achieved, effectively reducing the floor space. By having the first coating structure and the second coating structure apply coatings and dry the material on both sides separately, damage from contact between undried coatings and support rollers is avoided. The motor 54, through the first gear 10, the second gear 12, and multiple rubber belts, forms a unified power chain, enabling synchronous linkage between the three layers of conveying rollers and the pressure roller 5, avoiding structural redundancy and poor synchronization.

[0048] It is worth noting that the circuits, electronic components, and modules involved in this invention are all existing technologies (motor 54 can be a Mitsubishi HG-KR43J servo motor, temperature sensor can be a PT100 platinum resistance thermometer (such as WIKA TR10-B), fan 33 can be a centrifugal fan DF-120, air pump 45 can be a vacuum pump 2XZ-2, and all the above electrical components can be replaced by other electrical appliances of different models with the same function). Those skilled in the art can fully implement these technologies, so there is no need to elaborate further. The content protected by this invention does not involve improvements to the software and methods. This solution also includes an electrical control cabinet, which is installed on the equipment. During use, each electrical device can be started and operated separately through the electrical control cabinet. The power connection method of each electrical device is an existing mature technology, which is well known to those skilled in the art, and will not be elaborated further here.

[0049] It should be understood, in the several embodiments provided in this application, that the disclosed apparatus may be implemented in other ways.

[0050] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. A solid-state battery manufacturing apparatus, characterized in that, include: A lower drying oven, a middle drying oven installed on top of the lower drying oven, and an upper drying oven fixed on top of the middle drying oven, the lower drying oven, the middle drying oven and the upper drying oven cooperate to isolate the drying area coated with electrode material to be dried; Multiple first conveyor rollers, which are rotatably installed in the upper and middle drying ovens respectively, are used to convey and support the material load. Multiple pressure rollers are rotatably installed in the upper and middle drying ovens respectively, for cooperating with multiple first conveying rollers to clamp and stabilize the material loading edge; A first coating structure and a second coating structure are respectively installed at the feed inlets of the upper oven and the middle oven for coating both sides of the material. The second conveyor rollers are rotatably installed in the lower drying oven and arranged in groups. The second conveyor rollers are used to support and convey the load material for drying the surface of the electrode material. A power structure disposed between the lower, middle and upper ovens for driving the first conveying roller, the pressure roller and the second conveying roller to rotate in order to convey the material.

2. The solid-state battery manufacturing equipment as described in claim 1, characterized in that, The power structure includes multiple first rubber belts respectively disposed on the lower, middle, and upper drying ovens. The first rubber belts on the upper drying oven are sleeved on the outside of multiple first conveying rollers and pressure rollers located inside the upper drying oven. The first rubber belts on the middle drying oven are sleeved on the outside of the multiple first conveying rollers and pressure rollers located inside the middle drying oven. The first rubber belts on the lower drying oven are sleeved between multiple second conveying rollers located inside the lower drying oven. Multiple limiting shafts rotatably mounted on the lower, middle, and upper drying ovens respectively contact the multiple first rubber belts to increase the transmission stability of the first rubber belts. The upper oven has a first rotating shaft, and a first gear is fixed on the first rotating shaft and any one of the first conveying rollers located on the upper oven. The two first gears mesh for transmission. A second rubber belt is sleeved on the first rotating shaft and any one of the pressure rollers located on the middle oven. A second rotating shaft is rotatably mounted on the middle oven. A second gear is fixed on the second rotating shaft and any one of the first conveying rollers located on the middle oven. The two second gears mesh for transmission. A third rubber belt is sleeved on the second rotating shaft and any one of the second conveying rollers for transmission. A motor is fixed on the upper oven. The output shaft of the motor is connected to any one of the pressure rollers through a coupling.

3. The solid-state battery manufacturing equipment as described in claim 1, characterized in that, The lower, middle, and upper ovens are each equipped with an extension box on both sides to reduce heat emissions. The lower, middle, upper, and extension boxes are each provided with an opening slit on both sides to provide material inlet and outlet channels. A fixed frame is fixed on the extension box, and multiple guide rollers for guiding the material conveying direction are rotatably mounted on the fixed frame.

4. The solid-state battery manufacturing equipment as described in claim 2, characterized in that, The first coating structure includes a first storage tank fixed on the fixed frame, a first stirring rod rotatably installed in the first storage tank, a first discharge pipe installed on the first storage tank via a first pump, and a first coating roller rotatably installed on the first storage tank. The second coating structure includes a second storage tank, a second stirring rod, a second pump, a second discharge pipe, and a second coating roller. The first stirring rod and the first coating roller are fitted with a fourth rubber belt for transmission. The first coating roller and the second stirring rod are fitted with a fifth rubber belt for transmission. The second stirring rod and the second coating roller are fitted with a sixth rubber belt for transmission. The second coating roller and any one of the first conveying rollers are fitted with a seventh rubber belt for transmission.

5. The solid-state battery manufacturing equipment as described in claim 4, characterized in that, The bottom of the first storage box and the second storage box are respectively provided with a first protective structure and a second protective structure for wind protection. The first protective structure includes a fixing plate fixed on the first storage box, a first spring installed on the fixing plate, a pressure plate installed on the first spring, a plurality of limiting rods installed on the first discharge pipe, and a windproof plate sleeved on the plurality of limiting rods for wind protection. The pressure plate sleeved on the plurality of limiting rods is used to compress and stabilize the windproof plate.

6. The solid-state battery manufacturing equipment as described in claim 1, characterized in that, A fan is installed on the fixed frame. A first heating box is fixed on the lower oven and connected to the exhaust end of the fan. A second heating box is installed on the middle oven. A first connecting pipe connected to the second heating box is installed on the lower oven. A third heating box is installed on the upper oven. A second connecting pipe connected to the third heating box is installed on the middle oven. Multiple exhaust pipes are fixed inside the lower, middle, and upper ovens. The multiple exhaust pipes are respectively connected to the first, second, and third heating boxes. The first connecting pipe works in conjunction with the second connecting pipe to achieve graded heat recovery and utilization. The second heating box works in conjunction with the third heating box to increase the adjustability of the gradient temperature.

7. The solid-state battery manufacturing equipment as described in claim 6, characterized in that, Both the first connecting pipe and the second connecting pipe are equipped with dehumidification boxes. Both dehumidification boxes are filled with PTFE glass fiber sintered membrane filter material. Both dehumidification boxes can be detachably installed with a blocking plate for sealing the dehumidification box. The blocking plate is equipped with a sealing gasket that contacts the outer wall of the dehumidification box.

8. The solid-state battery manufacturing equipment as described in claim 6, characterized in that, The first and second conveying rollers are both fitted with outer expansion cylinders by bolts. The pressure roller is fitted with a pressure cylinder. Multiple outer expansion cylinders and pressure cylinders are fitted with anti-slip pads. The exhaust pipes located in the lower drying oven are arranged in groups and are located above and below the second conveying roller, respectively, for synchronously drying the electrode materials located above and below the load.

9. The solid-state battery manufacturing equipment as described in claim 4, characterized in that, Temperature sensors are installed in the lower, middle, and upper ovens. The top of the third heating box is equipped with an exhaust pipe for providing an exhaust gas delivery channel. Insulation layers are installed in the lower, middle, and upper ovens, as well as in the first and second storage boxes for heat insulation.

10. A method for manufacturing a solid-state battery, characterized in that, The solid-state battery manufacturing apparatus according to any one of claims 1-9 comprises the following steps: Step 1: Electrode material preparation; The active material, conductive agent, and binder are mixed in proportion, and an appropriate amount of solvent is added and stirred evenly to form a slurry. The slurry is then vacuum stirred to remove bubbles, ensuring that there are no bubbles. Step 2: Conveying the material; The material enters the solid-state battery manufacturing equipment through the opening of the extension box. The motor drives the pressure roller to rotate, and through the limit shaft, the first rubber belt, the first rotating shaft, the first gear, the second rubber belt, the second rotating shaft, the second gear, and the third rubber belt, the first conveying roller, the pressure roller, and the second conveying roller rotate to transport the material. The material is guided by guide rollers on both sides and passes through the first coating structure, the upper oven, the second coating structure, the middle oven, and the lower oven in sequence. Step 3: Coat and dry; During the coating process, the first discharge pipe sends the slurry from the first storage tank to the first coating roller via the first pump to coat the upper surface of the material. During drying, the material enters the upper drying oven and is initially dried after output, so it will not stick to the subsequent guide rollers. When passing through the second coating structure, the slurry is coated on the other surface of the material by the second coating roller. The material enters the middle drying oven and is then guided by the guide rollers into the lower drying oven for centralized drying. The drying heat source comes from the first heating box, the second heating box, and the third heating box, forming a temperature gradient. The temperature of the upper layer is the lowest to prevent cracking caused by rapid evaporation. During the process, hot air is evenly sprayed out through the exhaust pipe to dry the side with the material. During drying, the hot air passes through the lower drying box, the first connecting pipe, the middle drying box, the second connecting pipe, and the upper drying box in sequence. Step 4: Roll pressing and slitting; After drying, the electrode sheets are compacted by a roller press to increase energy density, and then cut into electrode sheets of the required size. Step 5: Cell assembly; The positive electrode, solid electrolyte membrane, and negative electrode are stacked in a sandwich configuration of negative electrode-solid electrolyte-positive electrode and then hot-pressed into contact. Step 6: Combine into a single, indivisible component; Solid-state battery formation is performed directly, followed by the first charge-discharge activation, capacity testing, and grading by capacity and internal resistance to complete the shipment.

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