Solid-state battery material and vibration field pressing production line thereof

Abstract

The application relates to the technical field of lithium batteries, in particular to a solid-state battery material and a vibration field pressing production line thereof, which comprises a film material unwinding roller set, a powder scattering mechanism and a vibration field pressing mechanism. The film material unwinding roller set comprises two first unwinding rollers which are arranged at intervals, each of the first unwinding rollers is wound with a porous skeleton film, and a gap formed by the two first unwinding rollers is directly above a feeding area; the powder scattering mechanism is arranged in the feeding area and is used for scattering solid-state electrolyte raw materials between the two porous skeleton films which are gradually unwound; the vibration field pressing mechanism comprises a pre-pressing roller set and a thinning roller set which are arranged opposite to each other along the height direction and are located below the powder scattering mechanism, and the pre-pressing roller set and the thinning roller set are used for step-by-step pressing of the two porous skeleton films, so that the solid-state electrolyte raw materials are embedded in the pores of the porous skeleton films to form a solid-state electrolyte separator. The application has the effect of facilitating large-scale industrial application of a dry process of a solid-state battery and a lithium ion battery electrode sheet.

Description

Technical Field

[0001] This application relates to the technical field of lithium batteries, and in particular to a solid-state battery material and its vibration field pressing production line. Background Technology

[0002] Currently, in the battery manufacturing field, with the continuous development of technology, new battery technologies such as solid-state batteries have gradually become a research and application hotspot. Solid-state batteries have many advantages, such as high energy density and long cycle life, and have shown great application potential in fields such as electric vehicles and portable electronic devices. At the same time, the manufacturing process of lithium-ion battery electrode sheets is also constantly being innovated. The emergence of dry process technology has brought new development directions to battery manufacturing. Its significant value in environmental protection, cost reduction, and process simplification is driving the battery industry towards a more efficient and greener direction. These technological advancements have not only improved battery performance and quality but also provided strong support for the development of related industries.

[0003] In the preparation of solid electrolyte membranes, a dry process is mainly used, which involves blending polytetrafluoroethylene (PTFE) with solid electrolytes (oxides, sulfides, polymers, halides, etc.) followed by fibrosis and roll forming. In the manufacturing of lithium-ion battery electrode sheets, the dry process involves directly mixing powders of active materials, conductive agents, and binders and pressing them into shape. Furthermore, related patents also provide methods for using polymer films as substrates to directly spray solid electrolyte raw materials onto the substrate surface to form dry-process electrodes.

[0004] However, solid electrolyte membranes prepared by rolling and pressing a blend of polytetrafluoroethylene (PTFE) and solid electrolyte have low mechanical strength, which depends on the PTFE content. Excessive PTFE content worsens the ionic conductivity of the electrolyte membrane, while insufficient content makes it difficult to withstand the tension of the winding rollers, hindering large-scale production and making it difficult to achieve thicknesses similar to ordinary separators. Furthermore, the dry process for lithium-ion battery electrodes suffers from insufficient binder dispersion, leading to poor film formation, uneven film thickness, and increased binder usage, ultimately affecting the conductivity and mechanical strength of the electrode. Methods using polymer films as substrates for spraying solid electrolyte raw materials result in dry electrode films with high surface resistance and low production efficiency. These problems severely restrict the large-scale industrial application of dry processes for solid-state batteries and lithium-ion battery electrodes. Summary of the Invention

[0005] To facilitate the large-scale industrial application of dry process technology for solid-state batteries and lithium-ion battery electrodes, this application provides a solid-state battery material and its vibration field pressing production line.

[0006] Firstly, this application provides a solid electrolyte diaphragm vibration field pressing production line, which adopts the following technical solution:

[0007] A solid electrolyte diaphragm vibration field pressing production line, comprising:

[0008] The membrane unwinding roller assembly includes two first unwinding rollers spaced apart from each other. A porous skeleton membrane is wound on each first unwinding roller. The area directly above the gap formed by the two first unwinding rollers is defined as the feeding zone.

[0009] A powder-sprinkling mechanism is provided in the feeding area and is used to sprinkle solid electrolyte raw materials into the gap between the two gradually unwinding porous skeleton membranes;

[0010] The vibration field pressing mechanism includes a pre-pressing roller group and a thinning roller group arranged opposite each other along the height direction and located below the powder spreading mechanism. The pre-pressing roller group and the thinning roller group each include two pressing rollers arranged in pairs. The two pressing rollers are located on opposite sides of two porous skeleton membranes. After the powder spreading mechanism spreads solid electrolyte raw material between the two porous skeleton membranes, the multiple pressing rollers are used to press the two porous skeleton membranes step by step so that the solid electrolyte raw material is embedded in the pores of the porous skeleton membrane to form a solid electrolyte diaphragm.

[0011] By adopting the above technical solution, two first unwinding rollers are spaced apart and each winds a porous skeleton membrane. The area directly above the gap between them is designated as a feeding zone, providing a specific feeding position for the powder-spreading mechanism. The powder-spreading mechanism, located in the feeding zone, can precisely spread solid electrolyte material into the gap between the two gradually unwinding porous skeleton membranes, ensuring the material accurately enters the designated area. After powder spreading, multiple pressing rollers press the two porous skeleton membranes together in stages. During this process, the pressure allows the solid electrolyte material to be better embedded in the pores of the porous skeleton membrane, ultimately forming a solid electrolyte separator. This achieves efficient manufacturing of the solid electrolyte separator. Simultaneously, the porous skeleton membrane provides support for the solid electrolyte material, improving the mechanical strength of the solid electrolyte separator and avoiding the problems of low mechanical strength and deteriorated ionic conductivity caused by using polytetrafluoroethylene (PTFE) blended with solid electrolytes for film forming. This facilitates large-scale winding and preparation, and allows the separator thickness to approach that of ordinary separators. This approach also solves the problems of insufficient binder dispersion and poor film thickness uniformity in traditional dry process of lithium-ion battery electrode sheets, facilitating the large-scale industrial application of dry process of solid-state battery and lithium-ion battery electrode sheets.

[0012] Optionally, one of the two paired pressing rollers is provided with a vibrating element, which is used to vibrate the pressing roller to embed the solid electrolyte material into the pores of the porous skeleton membrane.

[0013] By adopting the above technical solution, in the solid electrolyte membrane production process, after the powder-sprinkling mechanism sprinkles the solid electrolyte raw material between two porous framework membranes, the vibrating component causes the pressing roller to vibrate. This vibration can break the agglomeration force between the solid electrolyte raw material particles, making them easier to disperse. At the same time, the vibration can also promote the movement of the solid electrolyte raw material particles near the pores of the porous framework membrane, increasing the probability of the raw material particles entering the pores. This allows the solid electrolyte raw material to be more fully embedded in the pores of the porous framework membrane, which helps to improve the quality and performance of the solid electrolyte membrane. It solves the problems of low mechanical strength and affected ionic conductivity in the existing solid electrolyte membrane preparation, and facilitates the large-scale industrial application of dry process technology for solid-state batteries and lithium-ion battery electrode sheets.

[0014] Optionally, the vibration parameters of the vibrating element are adjustable, and the amplitude of the multiple vibrating elements gradually decreases along the conveying direction of the porous skeleton membrane.

[0015] By adopting the above technical solution, the vibration parameters of the vibrating components are adjustable. The optimal vibration parameters can be adjusted according to the embedding status of the solid electrolyte material in the pores of the porous framework membrane and different pressing stages, allowing the solid electrolyte material to be better embedded in the pores of the porous framework membrane. The amplitude of multiple vibrating components gradually decreases along the conveying direction of the porous framework membrane. In the initial stage, a larger amplitude promotes the rapid and sufficient entry of the solid electrolyte material into the pores of the porous framework membrane. As conveying progresses, the amplitude decreases, further compacting the solid electrolyte material while avoiding damage to the initially formed solid electrolyte membrane due to excessive vibration. This ensures the forming quality and stability of the solid electrolyte membrane, facilitating subsequent production and processing, and promoting the large-scale industrial application of dry-process technology for solid-state batteries and lithium-ion battery electrode sheets.

[0016] Optionally, the thinning roller group is provided in multiple sets, and the multiple sets of thinning roller groups are arranged in the horizontal direction to be configured to progressively compact and thin the initially formed solid electrolyte diaphragm.

[0017] By adopting the above technical solution, multiple sets of thinning rollers are arranged horizontally, allowing for multiple compaction operations on the initially formed solid electrolyte separator. Because the compaction and thinning are done in stages, each set of thinning rollers undertakes a portion of the compaction and thinning task, avoiding damage to the solid electrolyte separator caused by excessive pressure in a single operation. As the separator passes through multiple sets of thinning rollers sequentially, its thickness gradually decreases, and its internal structure becomes more compact. This effectively improves the density and uniformity of the solid electrolyte separator, allowing the solid electrolyte raw material to be more firmly embedded in the pores of the porous framework membrane. This enhances the mechanical strength and performance of the solid electrolyte separator, facilitating subsequent winding operations and promoting the large-scale industrial application of dry-process technology for solid-state batteries and lithium-ion battery electrodes.

[0018] Optionally, the system includes a frame and a first take-up roller group. The unwinding roller group, the pre-compression roller group, the thinning roller group, the powder spreading mechanism, and the first take-up roller group are respectively mounted on the frame. A film thickness detection component is provided between the first take-up roller group and the thinning roller group. The first take-up roller group is used to wind up the porous skeleton membrane that has passed through the thinning roller group. The film thickness detection component is used to detect the film thickness of the solid electrolyte separator.

[0019] By adopting the above technical solution, the unwinding roller group, pre-pressing roller group, thinning roller group, powder spreading mechanism, and first winding roller group are mounted on the frame, making the entire solid electrolyte separator vibration field pressing production line more compact and stable, which is conducive to the coordinated work of each mechanism. The first winding roller group winds up the porous skeleton membrane after passing through the thinning roller group, realizing the continuity and automation of the production process and improving production efficiency. A film thickness detection component is set between the first winding roller group and the thinning roller group, which can detect the film thickness of the solid electrolyte separator in real time before winding. If the film thickness is found to be unacceptable, parameters such as powder spreading amount and pressing pressure can be adjusted in time to ensure that the produced solid electrolyte separator has a uniform film thickness and meets the standards, improving product quality and facilitating the large-scale industrial application of dry process technology for solid-state batteries and lithium-ion battery electrode sheets.

[0020] Optionally, the powder spreading mechanism includes a powder hopper, a powder spreading roller assembly, and a powder spreading drive assembly. The powder hopper and the powder spreading drive assembly are respectively mounted on the frame. The bottom of the powder hopper has a discharge port. The powder spreading roller assembly is mounted on the powder spreading drive assembly and is located near the discharge port. The powder spreading drive assembly can drive the powder spreading roller assembly to rotate, so as to spread the solid electrolyte raw material stored in the powder hopper into the space between the two porous skeleton membranes.

[0021] By adopting the above technical solution, the powder silo is used to store solid electrolyte raw materials, and a discharge port is opened at the bottom to facilitate the falling of raw materials. A powder-spreading roller assembly is mounted on the powder-spreading drive component and close to the discharge port, which drives the powder-spreading roller assembly to rotate. During rotation, the powder-spreading roller assembly can drive the solid electrolyte raw materials in the powder silo to flow out from the discharge port and spread between the two porous skeleton membranes. This powder-spreading method enables controlled and stable spreading of solid electrolyte raw materials. Compared with random powder-spreading methods, it allows the raw materials to be more evenly distributed between the porous skeleton membranes, laying the foundation for the subsequent formation of a uniform solid electrolyte separator. This, in turn, helps improve the overall quality and performance of the solid electrolyte separator, facilitating the large-scale industrial application of dry process technology for solid-state batteries and lithium-ion battery electrode sheets.

[0022] Optionally, the powder-spreading roller assembly includes a grooved roller and a brush roller. The grooved roller and the brush roller are parallel to each other and are respectively disposed on the powder-spreading drive assembly. The grooved roller is disposed near the feed inlet. A groove is formed on the circumferential sidewall of the grooved roller. The brush roller is located below the grooved roller and contacts the circumferential sidewall of the grooved roller. A powder quantity position sensor is disposed on the powder hopper.

[0023] By adopting the above technical solution, the grooves on the circumferential sidewall of the grooved roller can scoop up the solid electrolyte raw material from the powder hopper during rotation. The brush roller contacts the circumferential sidewall of the grooved roller, brushing the raw material from the grooves off, making the amount of raw material falling between the two porous skeleton membranes more uniform and stable. At the same time, the powder level sensor installed on the powder hopper can monitor the powder level in the hopper in real time. When the powder level is insufficient, it can promptly remind the user to replenish the raw material, ensuring that the powder spreading process continues stably. This, in turn, ensures that the solid electrolyte raw material can be evenly spread between the two porous skeleton membranes, which is beneficial for the subsequent formation of a solid electrolyte separator with better quality and more stable performance.

[0024] Optionally, the powder-spreading drive assembly includes a mounting base, a drive component, and a lifting component. The mounting base is slidably mounted on the frame, the powder-spreading roller assembly is rotatably mounted on the mounting base, the drive component is mounted on the mounting base and connected to the powder-spreading roller assembly, and the lifting component is mounted on the frame and connected to the mounting base.

[0025] By adopting the above technical solution, the mounting base can slide on the frame, the powder-spreading roller assembly is rotatably mounted on the mounting base, and the drive component is mounted on the mounting base and connected to the powder-spreading roller assembly. This allows the drive component to drive the powder-spreading roller assembly to rotate, spreading the solid electrolyte raw material in the powder hopper between the two porous skeleton membranes. The lifting component is mounted on the frame and connected to the mounting base. The lifting component can drive the mounting base to move up and down, thereby driving the powder-spreading roller assembly to rise and fall. This facilitates adjustment of the relative position of the powder-spreading roller assembly with the discharge port and the porous skeleton membrane to adapt to different powder-spreading requirements. This ensures that the solid electrolyte raw material can be accurately and evenly spread between the two porous skeleton membranes, improving the precision and effect of powder spreading. Furthermore, this helps to better embed the solid electrolyte raw material into the pores of the porous skeleton membrane to form a solid electrolyte diaphragm.

[0026] Optionally, baffles are provided on both sides of the bottom of the powder hopper. The baffles are arranged along the length of the powder spreading roller assembly and close to the discharge port. A flexible plate is provided on the side of the discharge port, and the flexible plate is tangential to the powder spreading roller assembly.

[0027] By adopting the above technical solution, baffles are set on both sides of the bottom of the powder hopper along the length of the powder spreading roller assembly and close to the discharge port. This prevents the solid electrolyte raw material from overflowing from both sides of the discharge port, reduces material waste, and ensures the accuracy of powder spreading. A flexible plate is set on the side of the discharge port to abut against the powder spreading roller assembly. When the powder spreading roller assembly rotates, the flexible plate can scrape off the excess solid electrolyte raw material attached to the powder spreading roller assembly, making the amount of solid electrolyte raw material spread between the two porous skeleton membranes more accurate and more evenly distributed, thereby helping to improve the quality and performance of the solid electrolyte membrane.

[0028] Secondly, this application provides a solid electrolyte diaphragm, which is manufactured using the solid electrolyte diaphragm vibration field pressing production line described above.

[0029] Thirdly, the dry electrode sheet vibration field pressing production line provided in this application adopts the following technical solution:

[0030] A dry electrode sheet vibration field pressing production line, comprising:

[0031] At least one solid electrolyte diaphragm vibration field pressing production line as described in any of the above, the solid electrolyte diaphragm vibration field pressing production line being used to produce electrode membranes;

[0032] The second unwinding roller assembly has a current collector film wound on it;

[0033] The vibrating field hot press roller group is located below the second unwinding roller group;

[0034] The second take-up roller group is located at the end of the vibration field hot press roller group;

[0035] The current collector membrane and the electrode membrane respectively pass through the vibrating field hot press roller group and are pressed together by the vibrating field hot press roller group to form an electrode sheet, and then are wound around the second take-up roller group.

[0036] By adopting the above technical solution, an electrode film is produced using a solid electrolyte membrane vibration field pressing production line, providing a foundation for the preparation of dry-process electrode sheets. The current collector membrane is released from the second unwinding roller group, while the electrode film is manufactured on the production line; both pass together through a vibration field hot-pressing roller group. Under the action of the hot-pressing roller group, the current collector membrane and the electrode film can be effectively pressed together, ultimately forming a dry-process electrode sheet, which is then wound up by the second winding roller group. This facilitates the large-scale industrial application of dry-process electrode sheets for solid-state batteries and lithium-ion batteries.

[0037] Optionally, there are two solid electrolyte membrane vibration field pressing production lines, which are arranged at intervals. One solid electrolyte membrane vibration field pressing production line is used to provide a positive electrode material membrane to one side of the current collector membrane, and the other solid electrolyte membrane vibration field pressing production line is used to provide a negative electrode material membrane to the other side of the current collector membrane.

[0038] By adopting the above technical solution, two solid electrolyte separator vibration field pressing production lines are set up alternately, providing positive electrode material films and negative electrode material films to both sides of the current collector membrane. This allows the electrode films to be pressed onto both sides of the current collector membrane simultaneously, significantly improving production efficiency compared to a single production line processing both sides sequentially. Furthermore, this symmetrical arrangement helps ensure greater consistency in parameters such as thickness and uniformity of the electrode films on both sides of the current collector membrane, thereby improving the overall stability and consistency of the dry-process electrode sheet performance. This provides a high-quality electrode sheet foundation for subsequent battery cell manufacturing and is more conducive to the large-scale industrial application of dry-process electrode sheets for solid-state batteries and lithium-ion batteries.

[0039] Optionally, the vibration field hot press roller group includes a first preheating plate group, a second preheating plate group, and multiple hot press rollers. The first preheating plate group is arranged close to the second unwinding roller group, and the current collector film passes through the first preheating plate group. The second preheating plate group is arranged corresponding to the electrode film and located next to the first preheating plate group, and the electrode film passes through the second preheating plate group.

[0040] Multiple hot press rollers are arranged in pairs, and the multiple sets of hot press rollers are vertically distributed below the second preheating plate group. Two hot press rollers in the same group are arranged opposite each other, and the current collector membrane and the electrode membrane pass through the two opposite hot press rollers respectively.

[0041] By adopting the above technical solution, the first preheating plate group is set close to the second unwinding roller group. The current collector film passes through the first preheating plate group, which preheats the current collector film, allowing it to reach a suitable temperature and softness before entering the hot pressing rollers for better bonding with the electrode film. The second preheating plate group is set opposite to the electrode film. The electrode film passes through the second preheating plate group, which preheats the electrode film, improving its physical properties and enhancing its adhesion to the current collector film during pressing. The current collector film and the electrode film pass between two opposing hot pressing rollers, and through step-by-step hot pressing, the current collector film and the electrode film can be fully pressed together, improving the tightness and stability of the bonding, forming a high-quality dry electrode sheet. This is beneficial for improving the conductivity and mechanical strength of the electrode sheet, thus facilitating the large-scale industrial application of dry process technology for solid-state batteries and lithium-ion battery electrode sheets.

[0042] Optionally, one of the two hot press rollers in the same group is provided with a vibrating element for vibrating the hot press roller.

[0043] By adopting the above technical solution, during the hot pressing process of the hot pressing roller assembly, the vibrating component causes the hot pressing roller to vibrate. The vibration energy increases the fluidity and filling capacity between material particles such as current collector film and electrode film, allowing the materials to better embed and combine with each other during the pressing process, reducing the gaps between particles, thereby making the bonding between each material layer tighter, improving the pressing effect, and ensuring the quality and performance of solid-state solar cells.

[0044] Optionally, the vibration parameters of the vibrating element are adjustable, and the amplitude of the multiple vibrating elements gradually decreases from top to bottom.

[0045] By adopting the above technical solution, the vibration parameters of the vibrating components are adjustable, and the amplitude of multiple vibrating components gradually decreases from top to bottom. This allows the larger amplitude in the initial stage of the pressing process to better bond the current collector film and the electrode film, enhancing the forming effect of the dry electrode sheet. As the pressing progresses, the amplitude gradually decreases, enabling fine compaction of the initially formed dry electrode sheet, ensuring the uniformity and stability of the film. This, in turn, helps improve the performance and quality of the electrode sheet, facilitating the large-scale industrial application of the dry process for solid-state batteries and lithium-ion battery electrode sheets.

[0046] Fourthly, this application provides a dry electrode sheet, which is manufactured using the dry electrode sheet vibration field pressing production line described above, and the dry electrode sheet is a dry positive electrode sheet or a dry negative electrode sheet.

[0047] Fifthly, the solid-state battery cell vibration field pressing production line provided in this application adopts the following technical solution:

[0048] A solid-state battery cell vibration field pressing production line includes:

[0049] The electrode sheet unwinding roller assembly has two parts. One part of the electrode sheet unwinding roller assembly is wound with a dry negative electrode sheet manufactured by the dry electrode sheet vibration field pressing production line as described in any of the above contents. The other part of the electrode sheet unwinding roller assembly is wound with a dry positive electrode sheet manufactured by the dry electrode sheet vibration field pressing production line as described in any of the above contents.

[0050] The third unwinding roller group is disposed between the two electrode sheet unwinding roller groups, and a solid electrolyte diaphragm is wound on the third unwinding roller group;

[0051] The vibrating field hot press roller group is located below the third unwinding roller group;

[0052] The third take-up roller group is located at the end of the vibration field hot press roller group;

[0053] The solid electrolyte separator is located between the dry-process positive electrode and the dry-process negative electrode. The solid electrolyte separator, the dry-process positive electrode, and the dry-process negative electrode pass through the vibrating field hot press roller group and are pressed together by the vibrating field hot press roller group to form a battery cell, which is then wound around the third take-up roller group.

[0054] By adopting the above technical solution, two electrode unwinding roller groups are set up to wind the dry-process negative electrode and the dry-process positive electrode respectively, which can simultaneously provide the positive and negative electrode materials required for the battery cell. A third unwinding roller group is placed between the two electrode unwinding roller groups and winds the solid electrolyte separator, ensuring that the solid electrolyte separator is accurately positioned between the dry-process positive and negative electrode sheets, guaranteeing the basic structure of the battery cell. A vibration field hot-pressing roller group is placed below the third unwinding roller group. When the solid electrolyte separator, dry-process positive electrode, and dry-process negative electrode sheets pass through, the heat, pressure, and vibration field promote a tight bond between the materials, allowing the solid electrolyte separator to better adhere to the positive and negative electrode sheets, improving the stability and consistency of the battery cell's internal structure. Finally, the formed solid battery cell is wound up by a third winding roller group, facilitating subsequent storage, transportation, and further processing. This realizes an automated production process for solid-state batteries from raw materials to finished products, helping to improve production efficiency and product quality, and thus facilitating the large-scale industrial application of solid-state batteries.

[0055] Optionally, the vibration field hot press roller group includes a first preheating plate group, two second preheating plate groups and multiple hot press rollers. The first preheating plate group is arranged close to the third unwinding roller group, and the two second preheating plate groups are located on both sides of the first preheating plate group. The dry-process positive electrode sheet and the dry-process negative electrode sheet are arranged to correspond one-to-one and pass through the two second preheating plate groups.

[0056] Multiple hot-pressing rollers are arranged in pairs, and the multiple sets of hot-pressing rollers are vertically distributed below the second preheating plate group. Two hot-pressing rollers in the same group are arranged opposite each other. The solid electrolyte membrane passes through the first preheating plate group. The solid electrolyte membrane, the dry positive electrode sheet, and the dry negative electrode sheet pass between the two opposite hot-pressing rollers respectively.

[0057] By adopting the above technical solution, the first preheating plate group is positioned close to the third unwinding roller group to preheat the solid electrolyte membrane, ensuring it reaches a suitable temperature before entering the hot press rollers, which facilitates the subsequent pressing process. Two second preheating plate groups are located on either side of the first preheating plate group, preheating the dry-process positive and negative electrode sheets respectively. This improves the flexibility and plasticity of the electrode sheets, reducing the possibility of cracking or damage during pressing. The solid electrolyte membrane, dry-process positive electrode sheet, and dry-process negative electrode sheet pass between two opposing hot press rollers, allowing for step-by-step pressing to ensure a tight bond and form a solid-state battery cell, guaranteeing the structural stability and performance consistency of the solid-state battery cell.

[0058] Optionally, one of the two hot press rollers in the same group is connected to a vibrating element, the vibration parameters of which are adjustable, and the amplitude of the multiple vibrating elements gradually decreases from top to bottom.

[0059] By adopting the above technical solution, one of the two hot press rollers in the same group is connected to a vibrating element with adjustable vibration parameters, allowing the hot press rollers to vibrate during the pressing process. Vibration promotes better flow and rearrangement of particles between the solid electrolyte separator, dry-process positive electrode sheet, and dry-process negative electrode sheet, enhancing particle contact and improving the tightness and uniformity of the pressing. Multiple vibrating elements gradually decrease in amplitude from top to bottom. Combined with the material's state changes during pressing, the material just enters the pressing process at the upper hot press roller, where the gaps between particles are relatively large. A larger amplitude allows the particles to flow and fill within a wider range. As the pressing progresses below, the material gradually compacts, and a smaller amplitude further fine-tunes the particle position, ensuring that the final solid-state battery cell structure is stable, dense, and uniform. This improves the performance and quality of the solid-state battery cell, facilitating its large-scale industrial application.

[0060] Sixthly, the solid-state battery cell provided in this application is manufactured using the solid-state battery cell vibration field pressing production line described above.

[0061] Seventhly, the composite battery cell vibration field pressing production line provided in this application adopts the following technical solution:

[0062] A composite battery cell vibration field pressing production line includes:

[0063] The battery cell unwinding roller assembly has two sets, and the two battery cell unwinding roller assemblies are respectively wound with battery cells manufactured by the solid battery cell vibration field pressing production line as described in any of the above contents.

[0064] The fourth unwinding roller group is disposed between the two battery cell unwinding roller groups, and a solid electrolyte diaphragm is wound on the fourth unwinding roller group.

[0065] The vibrating field hot press roller group is located below the fourth unwinding roller group;

[0066] The fourth take-up roller group is located at the end of the vibration field hot press roller group;

[0067] The solid electrolyte separator is located between the two battery cells. The solid electrolyte separator and the battery cells pass through the vibrating field hot press roller group and are pressed together by the vibrating field hot press roller group to form a composite battery cell, which is then wound around the fourth take-up roller group.

[0068] By adopting the above technical solution, two unwinding roller groups are set up, on which solid-state solar cells manufactured by the vibration field pressing production line are wound, ensuring a continuous and stable supply of the required solid-state solar cells. A fourth unwinding roller group is positioned between the two unwinding roller groups and wound with a solid electrolyte separator, ensuring the solid electrolyte separator is accurately positioned between the two solar cells, providing a suitable stacked structure for subsequent pressing to form a composite solar cell. A vibration field hot pressing roller group is positioned below the fourth unwinding roller group, applying pressure and heat to the solid electrolyte separator and solar cells passing through them. Combined with vibration, this enhances the bonding force between the layers, ensuring they are tightly pressed together. A fourth winding roller group is located at the end of the vibration field hot pressing roller group, winding up the pressed composite solar cell for easy storage, transportation, and further processing. This achieves efficient and continuous production of composite solar cells, facilitating their large-scale industrial application.

[0069] Eighthly, the composite battery cell provided in this application is manufactured using the composite battery cell vibration field pressing production line described above.

[0070] In summary, this application includes at least one of the following beneficial technical effects:

[0071] 1. By using the first unwinding roller, the powder spreading mechanism and the vibration field pressing mechanism, solid electrolyte raw materials are embedded into the pores of the porous skeleton membrane to form a solid electrolyte diaphragm. This solves the problems of low mechanical strength, easy deterioration of ionic conductivity and difficulty in large-scale winding of polytetrafluoroethylene blended roll pressing film, thus facilitating the large-scale industrial application of dry process for solid-state battery and lithium-ion battery electrode sheets.

[0072] 2. By using a vibrating component to drive the pressing roller to vibrate, the solid electrolyte raw material can be more fully embedded in the pores of the porous skeleton membrane, which helps to improve the quality and performance of the solid electrolyte membrane;

[0073] 3. By incorporating grooved rollers, brush rollers, and powder position sensors, the solid electrolyte raw materials in the powder hopper can be more evenly distributed between the two porous skeleton membranes, improving the uniformity and accuracy of powder distribution and thus enhancing the quality of the solid electrolyte membrane. Attached Figure Description

[0074] Figure 1 This is a schematic diagram of the overall structure of a solid electrolyte diaphragm vibration field pressing production line according to Embodiment 1 of this application.

[0075] Figure 2 This is a cross-sectional view of a solid electrolyte diaphragm vibration field pressing production line according to Embodiment 1 of this application.

[0076] Figure 3 This is a partial structural cross-sectional view of the powder spreading mechanism and the vibration field pressing mechanism in Embodiment 1 of this application.

[0077] Figure 4 This is a partial structural schematic diagram of the powder-spreading roller assembly in Embodiment 1 of this application.

[0078] Figure 5 This is a cross-sectional view of a dry electrode sheet vibration field pressing production line according to Embodiment 3 of this application.

[0079] Figure 6 This is a partial structural cross-sectional view of a dry electrode sheet vibration field pressing production line according to Embodiment 3 of this application.

[0080] Figure 7 This is a schematic diagram of the overall structure of a solid-state battery cell vibration field pressing production line according to Embodiment 5 of this application.

[0081] Figure 8 This is a cross-sectional view of a solid-state battery cell vibration field pressing production line according to Embodiment 5 of this application.

[0082] Figure 9 This is a schematic diagram of the overall structure of a composite battery cell vibration field pressing production line in Embodiment 7 of this application.

[0083] Explanation of reference numerals in the attached figures:

[0084] 01. Membrane unwinding roller assembly; 011. First unwinding roller; 012. Tensioning roller; 013. Porous skeleton membrane; 02. Powder spreading mechanism; 021. Powder hopper; 0211. Feed port; 0212. Powder quantity position sensor; 0213. Baffle; 0214. Flexible plate; 022. Powder spreading roller assembly; 0221. Grooved roller; 0222. Brush roller; 023. Powder spreading drive assembly; 0231. Mounting base; 0232. Drive component; 0233. Lifting component; 03. Vibration field pressing mechanism; 031. Pre-pressing roller assembly; 032. Thinning roller assembly; 0321. Pressing roller; 0322. Oil pipe; 0323. Bearing seat; 04. Frame; 041. Slide groove; 042. Vibrating component; 043. Fine-tuning assembly; 0431. Fine-tuning drive component ; 0432, Fixed wedge block; 0433, Movable wedge block; 0434, Guide slope; 044, Film thickness detection component; 05, First take-up roller group; 051, First take-up roller; 06, Solid electrolyte diaphragm; 07, Second unwind roller group; 071, Current collector membrane material; 08, Vibration field hot press roller group; 081, First preheating plate group; 082, Second preheating plate group; 0821, Preheating plate; 083, Hot press roller; 09, Second take-up roller group; 10, Electrode membrane; 11, Electrode sheet; 12, Sealed box; 13, Electrode sheet unwind roller group; 14, Third unwind roller group; 15, Third take-up roller group; 16, Battery cell; 17, Battery cell unwind roller group; 18, Fourth unwind roller group; 19, Fourth take-up roller group; 20, Composite battery cell. Detailed Implementation

[0085] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0086] It should be noted that, in the description of this invention, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the solid-state battery materials in this invention include solid electrolyte separators, dry-process electrode sheets, solid-state battery cells, and composite battery cells, etc.

[0087] Example 1: This application discloses a solid electrolyte diaphragm vibration field pressing production line.

[0088] Reference Figure 1 and Figure 2A solid electrolyte diaphragm vibration field pressing production line includes a membrane unwinding roller group 01, a powder spreading mechanism 02, a vibration field pressing mechanism 03, a frame 04, and a first take-up roller group 05.

[0089] The membrane unwinding roller assembly 01, powder spreading mechanism 02, vibration field pressing mechanism 03, and first take-up roller assembly 05 are respectively mounted on the frame 04. The membrane unwinding roller assembly 01 provides a porous skeleton membrane 013. The powder spreading mechanism 02 spreads solid electrolyte material into the gap between two porous skeleton membranes 013. The vibration field pressing mechanism 03 is located below the powder spreading mechanism 02 and presses the porous skeleton membranes 013 with the spread solid electrolyte material in stages, so that the solid electrolyte material is embedded in the pores of the porous skeleton membrane 013 to form a solid electrolyte diaphragm 06. The solid electrolyte diaphragm 06 can be wound onto the first take-up roller assembly 05 for easy winding. This combination effectively solves the problems of low mechanical strength and poor ionic conductivity of traditional solid electrolyte membranes. The mechanical strength is improved by the support of the porous skeleton membrane 013, and the influence of excessive polytetrafluoroethylene content on ionic conductivity is avoided.

[0090] The materials of porous framework membrane 013 include polyolefins, polyethylene (PE), especially ultra-high molecular weight polyethylene (UHMWPE), polypropylene (PP), polyvinylidene fluoride (PVDF) and its copolymers (such as PVDF-HFP), as well as fluoropolymers. PVDF has excellent electrochemical stability and good affinity for electrolytes. These polymer materials can be prepared into porous membranes through methods such as phase inversion or stretching.

[0091] In this embodiment, the porous framework membrane 013 is an ultrathin biaxially oriented polytetrafluoroethylene (PTFE) porous membrane. The porosity of the PTFE biaxially oriented porous membrane ranges from 65% to 95%, the pore size ranges from 50 to 500 nm, and the thickness ranges from 1 to 4 μm.

[0092] In this embodiment, the solid electrolyte raw material includes solid electrolyte powder, lithium salt and binder. The solid electrolyte raw material comprises, by mass percentage, 60%-88 wt% solid electrolyte powder, 7.5%-37.5 wt% lithium salt and 0.00%-0.5 wt% binder.

[0093] In this embodiment, the overall thickness of the solid electrolyte membrane 06 ranges from 10 to 50 μm. Preferably, the overall thickness of the solid electrolyte membrane 06 is 15 μm ≤ d ≤ 30 μm.

[0094] The film unwinding roller assembly 01 includes two first unwinding rollers 011 spaced apart from each other. The two first unwinding rollers 011 are symmetrically and spaced apart on the frame 04. In this embodiment, the first unwinding rollers 011 are made of metal, such as stainless steel, to ensure their strength and durability.

[0095] A porous skeleton membrane 013 is wound on the first unwinding roller 011. In this embodiment, the porous skeleton membrane 013 is a porous polymer membrane. The area directly above the gap formed by the two first unwinding rollers 011 is defined as the feeding zone. During production line operation, the first unwinding rollers 011 can be driven to rotate by a motor or other drive equipment to realize the unwinding operation of the porous skeleton membrane 013.

[0096] Multiple tension rollers 012 are rotatably mounted on the frame 04. The multiple tension rollers 012 are located between the first unwinding roller 011 and the powder spreading mechanism 02. The porous skeleton membrane 013 of each first unwinding roller 011 is arranged to pass around the multiple tension rollers 012 in sequence, so as to use the tension rollers 012 to tension the porous skeleton membrane 013.

[0097] Reference Figure 1 and Figure 3 The powder-spreading mechanism 02 is located in the feeding area. The powder-spreading mechanism 02 can spread solid electrolyte raw materials into the gap between the two gradually unwinding porous skeleton membranes 013. Specifically, the powder-spreading mechanism 02 includes a powder hopper 021, a powder-spreading roller assembly 022, and a powder-spreading drive assembly 023. The powder hopper 021 is movably mounted on the frame 04, and the interior of the powder hopper 021 is used to store solid electrolyte raw materials. A discharge port 0211 is provided at the bottom of the powder hopper 021.

[0098] A powder quantity position sensor 0212 is installed on the powder hopper 021 to monitor the powder quantity in the powder hopper 021 in real time, so as to facilitate dynamic adjustment of the feed rate, so as to ensure that the powder in the powder hopper 021 is uniform and control the amount of powder entering the groove to be the same.

[0099] Baffles 0213 are respectively provided on both sides of the bottom of the powder hopper 021. The baffles 0213 are arranged along the length of the powder spreading roller assembly 022 and close to the discharge port 0211 to prevent solid electrolyte raw materials from spilling. Flexible plates 0214 are respectively provided on both sides of the bottom of the powder hopper 021. The flexible plates 0214 are located beside the discharge port 0211 and are tangentially in contact with the powder spreading roller assembly 022 to further control the discharge amount and uniformity. In this embodiment, the flexible plates 0214 can be made of rubber or silicone material.

[0100] Reference Figure 1The powder-spreading drive assembly 023 includes a mounting base 0231, a drive component 0232, and a lifting component 0233. The mounting base 0231 is slidably mounted on the frame 04, and a slide rail is provided between the mounting base 0231 and the frame 04 to facilitate smooth sliding of the mounting base 0231. The lifting component 0233 is mounted on the frame 04 and connected to the mounting base 0231. In this embodiment, the lifting component 0233 is a motor screw structure, facilitating the driving of the mounting base 0231 to rise and fall using the lifting component 0233.

[0101] Reference Figure 1 and Figure 3 The powder-spreading roller assembly 022 is rotatably mounted on the mounting base 0231, allowing the mounting base 0231 to drive the powder-spreading roller assembly 022 to rise and fall, thereby adjusting the height of the powder-spreading roller assembly 022. In another preferred embodiment, the powder hopper 021 can also be mounted on the mounting base 0231, allowing the powder hopper 021 to rise and fall along with the mounting base 0231.

[0102] The drive component 0232 is mounted on the mounting base 0231 and connected to the powder spreading roller assembly 022. In this embodiment, the drive component 0232 is a motor, so as to drive the powder spreading roller assembly 022 to rotate.

[0103] Reference Figure 1 and Figure 3 The powder-spreading roller assembly 022 includes a grooved roller 0221 and a brush roller 0222. The grooved roller 0221 and the brush roller 0222 are parallel to each other and mounted on a mounting base 0231. The brush roller 0222 is located below the grooved roller 0221 and contacts the circumferential sidewall of the grooved roller 0221. The grooved roller 0221 is positioned near the discharge port 0211. The number of driving components 0232 is adapted to the grooved roller 0221 and the brush roller 0222, and they are connected in a one-to-one correspondence, thereby enabling the driving components 0232 to drive the grooved roller 0221 and the brush roller 0222 to rotate respectively.

[0104] Reference Figure 4 The grooved roller 0221 has grooves on its circumferential sidewall. In this embodiment, the grooves are mesh-shaped.

[0105] Reference Figure 1 and Figure 3 During the powdering process, the drive component 0232 drives the grooved roller 0221 and the brush roller 0222 to rotate. When the grooved roller 0221 carries the solid electrolyte raw material through the brush roller 0222, the raw material is brushed off and sprinkled from the feed port 0211 into the space between the two porous skeleton membranes 013.

[0106] Reference Figure 2The vibration field pressing mechanism 03 includes a pre-pressing roller group 031 and a thinning roller group 032, which are arranged facing each other along the height direction and located below the brush roller 0222. In this embodiment, multiple thinning roller groups 032 are provided, and the multiple thinning roller groups 032 are arranged in the horizontal direction to progressively compact and thin the initially formed solid electrolyte membrane 06, making the thickness of the solid electrolyte membrane 06 more uniform and meeting the requirements.

[0107] Reference Figure 1 and Figure 2 The pre-pressing roller group 031 and the thinning roller group 032 each include two pressing rollers 0321 arranged in pairs. The two pressing rollers 0321 are located on opposite sides of the two porous skeleton membranes 013. The pressing rollers 0321 are provided with heat exchange channels inside. One end of the pressing rollers 0321 is connected to the oil pipe 0322 through a rotary joint. The other end of the pressing rollers 0321 is connected to a motor, so that the pressing rollers 0321 can be driven to rotate by the motor. The oil pipe 0322 can introduce hot oil into the heat exchange channel to increase the temperature of the pressing rollers 0321, thereby facilitating the hot pressing of the solid electrolyte diaphragm 06 that has passed through the pressing rollers 0321.

[0108] It should be noted that the specific design of the heat exchange channel inside the pressing roller 0321 is a conventional technical means for those skilled in the art, and therefore will not be described in detail in the embodiments of this application.

[0109] One of the two paired pressing rollers 0321 is rotatably connected to the frame 04, and the two ends of the other pressing roller 0321 are rotatably connected to bearing seats 0323. The frame 04 has a sliding groove 041, and the bearing seats 0323 are slidably disposed in the sliding groove 041. A vibrating element 042 is installed on the frame 04, and one end of the vibrating element 042 is fixedly connected to the bearing seat 0323.

[0110] In this embodiment, the vibrating element 042 is an electro-hydraulic composite drive device, the structure of which and its working principle are as follows:

[0111] Vibrating component 042 includes a hydraulic cylinder that provides base pressure and a piezoelectric ceramic stack that generates high-frequency vibration. Specifically, the cylinder body is fixed to the frame 04, and the end of its piston rod is connected to one end of the piezoelectric ceramic stack. The other end of the piezoelectric ceramic stack is fixedly connected to the bearing housing 0323, thus forming a series structure of the hydraulic cylinder, piezoelectric ceramic, and bearing housing in the direction of force transmission.

[0112] During operation, the control system adjusts the oil pressure entering the cylinder through the hydraulic station, causing the piston rod of the cylinder to extend and apply a stable and adjustable static preload pressure to the bearing housing 0323. This pressure range can be adjusted, for example, between 1-10 MPa, to ensure that the pressing roller 0321 effectively presses the porous skeleton membrane 013.

[0113] Simultaneously, an independent high-frequency driving power supply applies a high-frequency alternating voltage (e.g., frequency between 1kHz and 20kHz, voltage adjustable within the range of 0-150V) to the piezoelectric ceramic stack. Under the action of the inverse piezoelectric effect, the piezoelectric ceramic stack generates micron-level expansion and contraction displacement. This high-frequency displacement, superimposed on the static pressure provided by the hydraulic cylinder, causes the pressing roller 0321 to macroscopically compact the material while simultaneously vibrating at high frequency and micro-amplitude. This effectively breaks down the agglomeration forces between powder particles, promoting more complete and uniform embedding of the solid electrolyte raw material into the pores of the porous framework membrane 013.

[0114] The vibration parameters of the vibrating element 042 are adjustable, and the amplitude of multiple vibrating elements 042 gradually decreases along the conveying direction of the porous skeleton membrane 013, so that the solid electrolyte raw material can be effectively embedded and compacted at different stages.

[0115] The vibration frequency generated by vibrator 042 can be adjusted from 1kHz to 20kHz, and the amplitude can be adjusted from 1μm to 10μm. Along the conveying direction, the amplitude of multiple vibrators 042 can be reduced linearly or stepwise from the initial 8-10μm to the final 1-3μm.

[0116] In this embodiment, a fine-tuning component 043 is provided inside the chute 041, located between two pressing rollers 0321. The fine-tuning component 043 includes a fine-tuning drive component 0431, a fixed wedge block 0432, and a movable wedge block 0433. The fine-tuning drive component 0431 is mounted on the frame 04. Both the fixed wedge block 0432 and the movable wedge block 0433 are located inside the chute 041 and between the two pressing rollers 0321. The fixed wedge block 0432 is fixedly connected to the inner wall of the chute 041. The movable wedge block 0433 is respectively attached to the bearing seat 0323 and the fixed wedge block 0432, and a guide slope 0434 is provided on the side where the fixed wedge block 0432 and the movable wedge block 0433 are attached to each other.

[0117] In this embodiment, the fine-tuning drive 0431 can drive the movable wedge block 0433 to move horizontally and rise and fall. When the fine-tuning drive 0431 drives the movable wedge block 0433 to rise and fall, the movable wedge block 0433 interacts with the fixed wedge block 0432, which can drive the bearing seat 0323 to move, so as to adjust the distance between the two pressing rollers 0321, thereby facilitating the adaptation to different film thicknesses.

[0118] It should be noted that the fine-tuning drive component 0431 can adopt a structure of cylinder and motor lead screw. As for the specific design of this structure, it is a conventional technical means for those skilled in the art. Therefore, it will not be described in detail in the embodiments of this application.

[0119] Reference Figure 1 and Figure 2 A film thickness detection component 044 is provided between the first take-up roller 051 and the thinning roller group 032. The film thickness detection component 044 can be a laser thickness gauge or an ultrasonic thickness gauge, used to detect the film thickness of the solid electrolyte membrane 06. When the film thickness detection component 044 detects that the film thickness of the solid electrolyte membrane 06 does not meet expectations, the fine-tuning drive component 0431 operates to adjust the distance between the two pressing rollers 0321 and adjust the vibration parameters of the piezoelectric ceramic to ensure that the film thickness of the subsequently pressed solid electrolyte membrane 06 meets the requirements.

[0120] It should be noted that how to make the film thickness detection component 044, the fine-tuning drive component 0431, and the piezoelectric ceramic work together is a conventional technique for those skilled in the art. Therefore, it will not be described in detail in the embodiments of this application.

[0121] Reference Figure 1 The first take-up roller group 05 includes a first take-up roller 051, which is rotatably connected to the frame 04 and is driven to rotate by a motor to facilitate the winding of the solid electrolyte diaphragm 06.

[0122] The implementation principle of a solid electrolyte membrane vibration field pressing production line according to an embodiment of this application is as follows: When it is necessary to produce a solid electrolyte membrane 06, the first unwinding roller 011 unwinds the porous skeleton membrane 013, the grooved roller 0221 and the brush roller 0222 rotate relative to each other, the grooved roller 0221 carries the solid electrolyte raw material in the powder hopper 021 out of the powder hopper 021, and the brush roller 0222 brushes the solid electrolyte raw material off the grooved roller 0221 to sprinkle the solid electrolyte raw material between the two porous skeleton membranes 013. Two porous skeleton membranes 013 drive the solid electrolyte raw material to pass sequentially between a pair of pressing rollers 0321 to progressively compact and thin the porous skeleton membranes 013 and the solid electrolyte raw material. At the same time, the vibrating element 042 drives the pressing rollers 0321 to vibrate, so that the porous skeleton membranes 013 and the solid electrolyte raw material can better bond together, thereby forming a solid electrolyte diaphragm 06. The solid electrolyte diaphragm 06 can pass through the membrane thickness detection component 044 and be wound on the first winding roller 051 to facilitate the winding of the produced solid electrolyte diaphragm 06.

[0123] The solid electrolyte membrane vibration field pressing production line provided in this solution uses a double-layer sandwich structure design to force the composite material to be evenly distributed by the physical confinement effect of the porous skeleton membrane 013. At the same time, the multi-level vibration of the vibration field increases the density of the solid electrolyte raw material in the porous skeleton membrane 013, and enhances the mechanical interlock between the fibrous solid electrolyte raw material and the porous skeleton membrane 013. The resulting solid electrolyte membrane 06 can achieve a balance between membrane density and conductivity without relying on solvent dispersion.

[0124] Example 2: Refer to Figure 2 This application also discloses a solid electrolyte membrane 06, which is manufactured by the solid electrolyte membrane vibration field pressing production line in Example 1.

[0125] The difference between this invention and the existing technology of "PTFE and electrolyte blending and rolling" is that...

[0126] A porous framework membrane 013 is introduced as a support, and a vibration embedding method is used to replace the bonding and fiberizing effect of PTFE. Compared with the existing technology of "spraying on the surface of the substrate", the difference of this invention is that the powder is "embedded" into the interior of the porous substrate, rather than just attached to the surface, and it is a dry process.

[0127] Compared to traditional dry electrode processes, the present invention differs in that it uses a porous skeleton membrane 013 to enhance mechanical strength and utilizes a vibration field to improve the uniformity of powder filling and compaction, thereby solving problems such as uneven binder dispersion.

[0128] Example 3: Reference Figure 5 and Figure 6 This application also discloses a dry electrode sheet vibration field pressing production line, including at least one solid electrolyte diaphragm vibration field pressing production line as in Example 1, a second unwinding roller group 07, a vibration field hot pressing roller group 08, and a second winding roller group 09.

[0129] The solid electrolyte separator vibration field pressing production line is used to produce the electrode film 10. The second unwinding roller group 07 provides the current collector film material 071, the vibration field hot pressing roller group 08 presses the current collector film material 071 and the electrode film 10 together, and the second winding roller group 09 winds up the electrode sheet 11 formed by pressing. This combination method solves the problems of insufficient binder dispersion and poor film formation effect in the traditional dry process of lithium-ion battery electrode sheets, and improves the conductivity and mechanical strength of the electrode sheet 11. In this embodiment, the electrode sheet 11 is a dry process electrode sheet.

[0130] When dry-process positive electrode sheets are required, the solid electrolyte raw material used in the solid electrolyte membrane vibration field pressing production line is replaced with powdered positive electrode material so that the solid electrolyte membrane vibration field pressing production line produces electrode film 10. Similarly, when dry-process negative electrode sheets are required, the solid electrolyte raw material is replaced with powdered negative electrode material.

[0131] In this embodiment, two solid electrolyte membrane vibration field pressing production lines are provided, respectively located on both sides of the second unwinding roller group 07. One solid electrolyte membrane vibration field pressing production line is used to provide the positive electrode material film to the current collector membrane 071, and the other solid electrolyte membrane vibration field pressing production line is used to provide the negative electrode material film to the current collector membrane 071, so as to realize the production of the double-sided electrode sheet 11. The positive electrode material film and the negative electrode material film can be collectively referred to as the electrode film 10.

[0132] In another preferred embodiment, only one solid electrolyte diaphragm vibration field pressing production line may be set up as needed.

[0133] Reference Figure 5 The second unwinding roller group 07 is mounted on the frame 04. The current collector film 071 is wound on the second unwinding roller group 07. The current collector film 071 can be copper foil or aluminum foil, etc. The structure and working principle of the second unwinding roller group 07 are similar to those of the film unwinding roller group 01. The current collector film 071 is unwound by being driven to rotate by a motor or the like.

[0134] Reference Figure 6 The vibration field hot press roller assembly 08 includes a first preheating plate assembly 081, a second preheating plate assembly 082, and multiple hot press rollers 083. The first preheating plate assembly 081 is positioned close to the second unwinding roller assembly 07, and the current collector film 071 passes through it. The second preheating plate assembly 082 is located beside the first preheating plate assembly 081, and the number of second preheating plate assemblies 082 is equal to the number of electrode films 10, allowing each electrode film 10 to pass through one second preheating plate assembly 082.

[0135] In this embodiment, the first preheating plate group 081 and the second preheating plate group 082 each include two preheating plates 0821 arranged in pairs. In this embodiment, the preheating plate 0821 is an electric heating plate, which is used to preheat the current collector membrane 071 and the electrode membrane 10 and improve their plasticity.

[0136] A cylinder is connected to one of the two preheating plates 0821 arranged in pairs. The cylinder can drive the preheating plate 0821 to move, so that the two preheating plates 0821 move closer or further apart, thereby facilitating the adjustment of the distance between the two preheating plates 0821. It should be noted that how to use the cylinder to drive the preheating plate 0821 to move is a conventional technical means for those skilled in the art, and therefore will not be described in detail in this application embodiment.

[0137] The heating temperature of the preheating plate 0821 can be set to 80℃-150℃, and the working temperature of the hot press roller 083 can be set to 100℃-180℃. The specific temperature is adjusted according to the softening point of the adhesive or polymer material used.

[0138] Multiple hot press rollers 083 are arranged in pairs, with multiple sets of hot press rollers 083 vertically distributed below the second preheating plate group 082. The two hot press rollers 083 in the same group are arranged opposite each other. The current collector membrane 071 and the electrode membrane 10 pass between the two opposite hot press rollers 083 respectively, and are pressed together under the pressure and heat of the hot press rollers 083.

[0139] A vibrating element 042 is also provided on one of the two hot press rollers 083 in the same group. In this embodiment, the vibrating element 042 is similar to that in Embodiment 1, used to vibrate the hot press roller 083 to promote better bonding between the current collector membrane material 071 and the electrode membrane 10. The vibration parameters of the vibrating element 042 are adjustable, and the amplitude of multiple vibrating elements 042 gradually decreases from top to bottom, which can be adjusted according to the pressing requirements at different stages.

[0140] Reference Figure 1 and Figure 5 The second take-up roller group 09 is located at the end of the vibrating field hot press roller group 08 and is used to take up the electrode sheet 11 formed by pressing. Its structure and working principle are similar to those of the first take-up roller group 05.

[0141] Reference Figure 5 and Figure 6 A sealed housing 12 is provided between the second take-up roller group 09 and the hot pressing roller 083. The electrode sheet 11 passes through the sealed housing 12 and is wound around the second take-up roller group 09. The sealed housing 12 can support the electrode sheet 11 to prevent deformation of the electrode sheet 11 due to excessive transport. A film thickness detection component 044, as shown in Embodiment 1, is provided between the sealed housing 12 and the second take-up roller group 09 to detect the film thickness of the electrode sheet 11.

[0142] The implementation principle of the dry electrode sheet vibration field pressing production line according to this application embodiment is as follows: The dry electrode sheet vibration field pressing production line produces electrode film 10 through a solid electrolyte diaphragm vibration field pressing production line. This electrode film 10, together with current collector film 071, is pressed by a vibration field hot press roller group 08. A preheating plate 0821 improves the plasticity of the material, and a vibrating element 042 promotes the bonding of the material. Finally, it is wound up by a second winding roller group 09. This method solves the problem of insufficient binder dispersion in traditional dry processes, improves the quality and performance of the electrode sheet 11, and is suitable for large-scale production.

[0143] Example 4: Reference Figure 6 This application also discloses a dry electrode sheet, which is manufactured by the dry electrode sheet vibration field pressing production line in Example 3, and the dry electrode sheet can be a dry positive electrode sheet or a dry negative electrode sheet.

[0144] The production line of this application solves the problems of insufficient binder dispersion, poor film formation effect, and poor film thickness uniformity in traditional dry electrode sheet processes.

[0145] Specifically, before pressing, the current collector membrane 071 and the electrode membrane 10 are preheated by passing through the first preheating plate group 081 and the second preheating plate group 082, respectively. The final pressing is completed by multiple sets of vibrating hot press rollers 083. The vibration during the pressing process increases the fluidity and filling properties between the material particles such as the current collector membrane 071 and the electrode membrane 10, allowing the materials to better interlock and bond during the pressing process, reducing the gaps between particles, thereby making the bonding between the material layers tighter. By preheating the current collector membrane 071 and the electrode membrane 10 and using the vibrating hot press roller group 08 for step-by-step pressing, the bonding between the material layers is tighter and more stable, thereby effectively improving the conductivity and mechanical strength of the final dry electrode sheet.

[0146] By adopting the production process of this application, the overall quality and performance of dry-process electrode sheets can be improved. The design of the entire production line realizes continuous and automated production from raw materials to finished products, solving the problems of low preparation efficiency and difficulty in large-scale production in existing technologies, and facilitating the large-scale industrial application of dry-process electrode sheets for solid-state batteries and lithium-ion batteries.

[0147] Example 5: This application also discloses a solid-state battery cell vibration field pressing production line.

[0148] Reference Figure 7 and Figure 8 A solid-state battery cell vibration field pressing production line includes an electrode sheet unwinding roller group 13, a third unwinding roller group 14, a vibration field hot pressing roller group 08, and a third take-up roller group 15. The electrode sheet unwinding roller group 13 provides the electrode sheet 11, the third unwinding roller group 14 provides the solid electrolyte membrane 06, the vibration field hot pressing roller group 08 presses the electrode sheet 11 and the solid electrolyte membrane 06 together, and the third take-up roller group 15 winds up the pressed battery cell 16. This combination improves the bonding force between the layers of the battery cell 16, ensuring the performance and stability of the battery cell 16. In this embodiment, the battery cell 16 is a solid-state battery cell.

[0149] Specifically, there are two electrode unwinding roller groups 13, each mounted on the frame 04. One electrode unwinding roller group 13 has a dry-process negative electrode wound on it, and the other has a dry-process positive electrode wound on it. The structure and working principle of these two electrode unwinding roller groups 13 are similar to those of the first unwinding roller 011. The third unwinding roller group 14 is located between the two electrode unwinding roller groups 13. The structure and working principle of the third unwinding roller group 14 are similar to those of the second unwinding roller group 07, and it is also driven by a motor to rotate and achieve unwinding.

[0150] In this embodiment, the structure and working principle of the vibrating field hot pressing roller group 08 are similar to those in embodiment 3, and will not be described in detail here. The third winding roller group 15 is located at the end of the vibrating field hot pressing roller group 08 and is used to wind up the pressed battery cell 16.

[0151] The implementation principle of a solid-state battery cell vibration field bonding production line according to an embodiment of this application is as follows: The required materials are provided by the electrode sheet unwinding roller group 13 and the third unwinding roller group 14. The vibration field hot pressing roller group 08 utilizes preheating and vibration to better bond the solid electrolyte separator 06, the dry-process positive electrode sheet, and the dry-process negative electrode sheet. Finally, the third winding roller group 15 winds them up. This method improves the quality and performance of the battery cell 16, avoids the problem of loose bonding between layers, and is conducive to the industrialization of solid-state batteries.

[0152] Example 6: Refer to Figure 8 This application also discloses a solid-state battery cell, which is manufactured by the solid-state battery cell vibration field pressing production line in Example 5.

[0153] The battery cell 16 is assembled from high-quality dry-process electrode sheets and solid electrolyte membrane 06 produced by the preceding processes of this application. Before the battery cell 16 is pressed together, its core components already have the following advantages: the electrode sheets 11 and the solid electrolyte membrane 06 have superior performance. As analyzed above, these electrode sheets 11 and solid electrolyte membrane 06 are made by the "skeleton support + vibration powder embedding" process, and they themselves have the characteristics of uniform distribution of active materials and high mechanical strength.

[0154] Secondly, an advanced lamination process of "preheating + vibration hot pressing" is adopted to ensure that the high-quality "positive electrode sheet-separator-negative electrode sheet" are finely composited into a whole, avoiding the problem of loose bonding between layers common in traditional processes. Before entering the hot pressing roller 083, the separator, positive electrode sheet, and negative electrode sheet are preheated by passing through the first preheating plate group 081 and the second preheating plate group 082, respectively. Preheating can improve the flexibility and plasticity of the electrode sheet 11, reducing the possibility of cracking or damage during the pressing process.

[0155] Example 7: This application also discloses a composite battery cell vibration field pressing production line.

[0156] Reference Figure 8 and Figure 9 The structure of a composite battery cell vibration field pressing production line is the same as that of the solid battery cell vibration field pressing production line in Example 5. The difference is that the electrode sheet unwinding roller group 13 is replaced with the battery cell unwinding roller group 17. The battery cell 16 produced in Example 5 is wound on the battery cell unwinding roller group 17. The third unwinding roller group 14 is replaced with the fourth unwinding roller group 18 and the third winding roller group 15 is replaced with the fourth winding roller group 19. The solid electrolyte diaphragm 06 is wound on the fourth unwinding roller group 18 and the fourth winding roller group 19 is used to wind up the pressed composite battery cell 20.

[0157] The implementation principle of a composite solar cell vibration field pressing production line according to an embodiment of this application is as follows: The required materials are provided by the solar cell unwinding roller group 17 and the fourth unwinding roller group 18. The vibration field hot pressing roller group 08 utilizes preheating and vibration to achieve the composite bonding of multiple solar cells 16, which are finally wound up by the fourth winding roller group 19. This method improves the quality and performance of the composite solar cell 20, meets higher usage requirements, avoids the problem of loose bonding between layers, and is conducive to the industrialization of solid-state batteries.

[0158] Example 8: Refer to Figure 9 This application also discloses a composite battery cell 20, which is manufactured by the composite battery cell vibration field pressing production line in Example 7.

[0159] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A solid-state electrolyte separator vibration field press production line, characterized by, The application relates to a solid-state electrolyte diaphragm production device. The device comprises a film material unwinding roller set (01), a powder scattering mechanism (02) and a vibration field pressing mechanism (03). The film material unwinding roller set (01) comprises two first unwinding rollers (011) arranged at intervals, each of which is wound with a porous framework film (013), and a gap formed by the two first unwinding rollers (011) is defined as a feeding area, and the porous framework film (013) is conveyed from top to bottom under the action of gravity. The powder scattering mechanism (02) is arranged in the feeding area and is used for scattering solid-state electrolyte raw materials into a downward moving gap formed by the two porous framework films (013) gradually unwound. The vibration field pressing mechanism (03) comprises a pre-pressing roller set (031) and a thinning roller set (032) arranged opposite to each other in the height direction and located below the powder scattering mechanism (02), the pre-pressing roller set (031) and the thinning roller set (032) each comprise two pressing rollers (0321) arranged in pairs, and the two pressing rollers (0321) are respectively located at opposite sides of the two porous framework films (013).

2. The solid-state electrolyte separator oscillation field lamination production line of claim 1, wherein: When the powder scattering mechanism (02) scatters the solid-state electrolyte raw materials between the two porous framework films (013), the multiple pressing rollers (0321) are used for gradually pressing the two porous framework films (013) to embed the solid-state electrolyte raw materials into the pores of the porous framework films (013) to form a solid-state electrolyte diaphragm (06).

3. The solid-state electrolyte separator oscillation field lamination production line of claim 1, wherein: One of the two pressing rollers (0321) arranged in pairs is provided with a vibration piece (042), the vibration piece (042) is used for vibrating the pressing roller (0321), the vibration parameters of the vibration piece (042) are adjustable, and the amplitudes of multiple vibration pieces (042) gradually decrease along the conveying direction of the porous framework film (013). The thinning roller set (032) is arranged in multiple groups, and the multiple groups of the thinning roller set (032) are arranged in the horizontal direction to gradually compact and thin the initially formed solid-state electrolyte diaphragm (06). The device comprises a rack (04) and a first winding roller set (05), the film material unwinding roller set (01), the pre-pressing roller set (031), the thinning roller set (032), the powder scattering mechanism (02) and the first winding roller set (05) are arranged on the rack (04), a film thickness detection assembly (044) is arranged between the first winding roller set (05) and the thinning roller set (032), the first winding roller set (05) is used for winding the porous framework film (013) passing through the thinning roller set (032), and the film thickness detection assembly (044) is used for detecting the film thickness of the solid-state electrolyte diaphragm (06).

4. The solid-state electrolyte separator oscillation field lamination production line of claim 3, wherein: The powder scattering mechanism (02) comprises a powder bin (021), a powder scattering roller set (022), and a powder scattering driving assembly (023). The powder bin (021) and the powder scattering driving assembly (023) are respectively arranged on the rack (04). The bottom of the powder bin (021) is provided with a discharging port (0211). The powder scattering roller set (022) is arranged on the powder scattering driving assembly (023) and close to the discharging port (0211). The powder scattering driving assembly (023) can drive the powder scattering roller set (022) to rotate, so as to scatter the solid-state electrolyte raw material stored in the powder bin (021) between the two porous framework membranes (013).

5. The solid-state electrolyte separator oscillation field lamination production line of claim 4, wherein: The powder scattering roller set (022) comprises a groove roller (0221) and a brush roller (0222). The groove roller (0221) and the brush roller (0222) are parallel to each other and are respectively arranged on the powder scattering driving assembly (023). The groove roller (0221) is arranged close to the discharging port (0211). The circumferential side wall of the groove roller (0221) is provided with a groove. The brush roller (0222) is located below the groove roller (0221) and is in contact with the circumferential side wall of the groove roller (0221). The powder bin (021) is provided with a powder amount position sensor (0212).

6. The solid-state electrolyte separator oscillation field lamination production line of claim 4, wherein: The powder scattering driving assembly (023) comprises a mounting seat (0231), a driving piece (0232), and a lifting piece (0233). The mounting seat (0231) is slidingly arranged on the rack (04). The powder scattering roller set (022) is rotatably arranged on the mounting seat (0231). The driving piece (0232) is arranged on the mounting seat (0231) and connected with the powder scattering roller set (022). The lifting piece (0233) is arranged on the rack (04) and connected with the mounting seat (0231).

7. The solid-state electrolyte separator oscillation field lamination production line of claim 4, wherein: The bottom of the powder bin (021) is provided with a baffle (0213) on both sides. The baffle (0213) is arranged along the length direction of the powder scattering roller set (022) and close to the discharging port (0211). A flexible plate (0214) is arranged beside the discharging port (0211). The flexible plate (0214) is tangentially arranged with the powder scattering roller set (022).

8. A solid state electrolyte separator, characterized by, The solid-state electrolyte diaphragm vibration field pressing production line is manufactured according to any one of claims 1-7.

9. A dry electrode sheet vibration field press production line characterized by, It comprises: at least one solid-state electrolyte diaphragm vibration field pressing production line according to any one of claims 1-7, which is used for producing an electrode membrane (10); a second unwinding roller set (07) on which a current collector membrane material (071) is wound; a vibration field hot pressing roller set (08) arranged below the second unwinding roller set (07); a second winding roller set (09) arranged at the end of the vibration field hot pressing roller set (08); The current collector film material (071) and the electrode film (10) pass through the vibration field hot pressing roller group (08) and are pressed to form an electrode sheet (11) and then are wound on the second winding roller group (09).

10. The dry electrode sheet vibration field press production line according to claim 9, characterized in that: The number of the solid-state electrolyte diaphragm vibration field pressing production lines is two, the two solid-state electrolyte diaphragm vibration field pressing production lines are arranged at intervals, one solid-state electrolyte diaphragm vibration field pressing production line is used to provide a positive electrode material film to one side of the current collector film material (071), and the other solid-state electrolyte diaphragm vibration field pressing production line is used to provide a negative electrode material film to the other side of the current collector film material (071).

11. The dry electrode sheet vibration field press production line according to claim 9, characterized in that: The vibration field hot pressing roller group (08) comprises a first preheating plate group (081), a second preheating plate group (082) and a plurality of hot pressing rollers (083), the first preheating plate group (081) is arranged close to the second unwinding roller group (07), the current collector film material (071) passes through the first preheating plate group (081), the second preheating plate group (082) is arranged corresponding to the electrode film (10) and is located on the side of the first preheating plate group (081), and the electrode film (10) passes through the second preheating plate group (082); The plurality of hot pressing rollers (083) are arranged in pairs, a plurality of groups of the hot pressing rollers (083) are distributed in the vertical direction below the second preheating plate group (082), the two hot pressing rollers (083) in the same group are arranged oppositely, and the current collector film material (071) and the electrode film (10) pass through between the opposite two hot pressing rollers (083).

12. The dry electrode sheet vibration field press production line according to claim 11, characterized by: One of the two hot pressing rollers (083) in the same group is provided with a vibration piece (042), and the vibration piece (042) is used to vibrate the hot pressing roller (083).

13. The dry electrode sheet vibration field press production line according to claim 12, characterized in that: The vibration parameters of the vibration piece (042) are adjustable, and the amplitudes of a plurality of vibration pieces (042) gradually decrease from top to bottom.

14. A dry electrode sheet, characterized by The dry-method electrode sheet vibration field pressing production line is manufactured by the dry-method electrode sheet vibration field pressing production line of claim 11, and the dry-method electrode sheet is a dry-method positive electrode sheet or a dry-method negative electrode sheet.

15. A solid state cell sheet vibro-press production line, characterized by, It comprises: The electrode sheet unwinding roller group (13) is provided with two, one of the electrode sheet unwinding roller groups (13) is wound with the dry-method negative electrode sheet manufactured by the dry-method electrode sheet vibration field pressing production line of claim 11, and the other electrode sheet unwinding roller group (13) is wound with the dry-method positive electrode sheet manufactured by the dry-method electrode sheet vibration field pressing production line of claim 11; The third unwinding roller group (14) is arranged between the two electrode sheet unwinding roller groups (13), and the third unwinding roller group (14) is wound with a solid-state electrolyte diaphragm (06); The vibration field hot pressing roller group (08) is arranged below the third unwinding roller group (14); The third winding roller group (15) is arranged at the end of the vibration field hot pressing roller group (08); The solid-state electrolyte separator (06) is located between the dry method positive electrode sheet and the dry method negative electrode sheet, and the solid-state electrolyte separator (06), the dry method positive electrode sheet and the dry method negative electrode sheet pass through the vibration field hot pressing roller group (08) respectively and are pressed after passing through the vibration field hot pressing roller group (08) to form a battery sheet (16) and are wound on the third winding roller group (15).

16. The solid state battery sheet vibro-impact field lamination production line of claim 15, wherein: The vibration field hot pressing roller group (08) comprises a first preheating plate group (081), two second preheating plate groups (082) and a plurality of hot pressing rollers (083), the first preheating plate group (081) is arranged close to the third unwinding roller group (14), and the two second preheating plate groups (082) are arranged on the two sides of the first preheating plate group (081); the dry method positive electrode sheet and the dry method negative electrode sheet are arranged one by one and pass through the two second preheating plate groups (082); A plurality of hot pressing rollers (083) are arranged in pairs, a plurality of groups of hot pressing rollers (083) are vertically distributed below the second preheating plate group (082), two hot pressing rollers (083) in the same group are arranged oppositely, the solid-state electrolyte separator (06) passes through the first preheating plate group (081), and the solid-state electrolyte separator (06), the dry method positive electrode sheet and the dry method negative electrode sheet pass through between the two opposite hot pressing rollers (083).

17. The solid state battery sheet vibro-impact field lamination production line of claim 16, wherein: One of the two hot pressing rollers (083) in the same group is connected with a vibration piece (042), the vibration parameters of the vibration piece (042) are adjustable, and the amplitudes of a plurality of vibration pieces (042) gradually decrease from top to bottom.

18. A solid state battery cell, characterized by Formed by the solid-state battery sheet vibration field pressing production line of claim 17.

19. A composite cell sheet vibration field pressing production line, characterized in that, Comprise: A battery sheet unwinding roller group (17) is arranged, two battery sheet unwinding roller groups (17) are arranged, and the battery sheet (16) produced and manufactured by the solid-state battery sheet vibration field pressing production line of claim 17 is wound on the two battery sheet unwinding roller groups (17) respectively; A fourth unwinding roller group (18) is arranged between the two battery sheet unwinding roller groups (17), and the solid-state electrolyte separator (06) is wound on the fourth unwinding roller group (18); A vibration field hot pressing roller group (08) is arranged below the fourth unwinding roller group (18); A fourth winding roller group (19) is arranged at the end of the vibration field hot pressing roller group (08); The solid-state electrolyte separator (06) is located between the two battery sheets (16), and the solid-state electrolyte separator (06) and the battery sheet (16) pass through the vibration field hot pressing roller group (08) respectively and are pressed after passing through the vibration field hot pressing roller group (08) to form a composite battery sheet (20) and are wound on the fourth winding roller group (19).

20. A composite cell, characterized in that, Formed by the composite battery sheet vibration field pressing production line of claim 19.

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