A semi-solid-state battery assembly system and method

Abstract

This invention discloses a semi-solid-state battery assembly system and method, relating to the field of semi-solid-state battery technology. It includes a sequentially arranged feeding mechanism comprising two sets of electrode feeding mechanisms, a separator feeding mechanism, and an electrode carrier feeding mechanism, with the electrode feeding mechanisms located on both sides of the separator feeding mechanism; a spraying mechanism, where the nozzles of the spraying mechanism spray an in-situ cured electrolyte towards the inner side of the electrode conveyed by the transmission roller and both sides of the separator conveyed by the separator feeding mechanism; an irradiation mechanism, which applies ultraviolet light to cure the in-situ cured electrolyte, with the ultraviolet light directed towards the position where the in-situ cured electrolyte has been sprayed; and a forming mechanism, including a heating device, a pressure roller, and upper and lower pressure plates, where the heating device and the pressure roller perform a second curing process of heating and pressurizing the electrode and separator. This invention improves the uniformity of electrolyte distribution and enhances the curing consistency and assembly efficiency of the semi-solid-state battery through orderly control of the assembly process.

Description

Technical Field

[0001] This invention relates to the field of semi-solid-state battery technology, and more specifically to a semi-solid-state battery assembly system and method. Background Technology

[0002] Semi-solid-state battery technology, currently serving as a transitional technology in the development from traditional liquid lithium-ion batteries to solid-state batteries, will play a crucial role until a fundamental breakthrough in solid-state batteries is achieved. In-situ solidification technology has gained widespread attention and application in semi-solid-state batteries due to its high compatibility with existing manufacturing processes and significant improvements in cell safety performance.

[0003] Current in-situ solidification technology involves adding the required polymer monomers and initiators to the electrolyte beforehand, and then injecting it into the battery cell during the electrolyte filling process. After thorough impregnation, the polymer monomers are in-situ cured inside the cell by applying certain temperature and pressure. However, the in-situ solidification electrolyte formation process is affected by the electrolyte formulation, viscosity, impregnation process, and the uniformity of temperature and pressure, resulting in poor curing consistency and ultimately affecting the overall performance and consistency of the battery. For example, after the in-situ solidified electrolyte is injected into the cell, the conditions for the curing reaction need to be precisely controlled; otherwise, partial curing or decreased fluidity may occur during impregnation, leading to uneven electrolyte distribution and dry areas, which seriously affects the cell performance. Furthermore, after impregnation, when curing begins, clamps are typically used to apply certain pressure and temperature to the cell. The uniformity of pressure applied to the cell surface and the uniformity of temperature distribution have a significant impact on the curing effect, placing very high demands on equipment and processes, making it difficult to control the actual curing effect.

[0004] For example, patent CN115548456B discloses a method for preparing an in-situ polymerized semi-solid battery, including the following steps: assembly: assembling a positive electrode, a separator, and a negative electrode into a casing to form a dry cell; primary electrolyte injection: injecting lithium battery liquid electrolyte; aging and formation; secondary electrolyte injection: injecting a mixture of polymer monomer, plasticizer, and initiator; the polymer monomer is a combination of vinylene carbonate and tripropynyl phosphate; aging: gelling through in-situ polymerization at 58-65℃ to obtain the low-impedance semi-solid battery.

[0005] Therefore, there is an urgent need to develop a new equipment system to achieve in-situ solid-state cell fabrication with high efficiency and high quality. Summary of the Invention

[0006] The technical problem that the invention aims to solve

[0007] To address the technical problems of existing in-situ solidification technology where partial solidification or decreased fluidity occurs during the immersion process, resulting in uneven electrolyte distribution and dry areas, which severely affects cell performance and leads to low production efficiency of traditional equipment, this invention provides a semi-solid-state battery assembly system. This system improves the uniformity of electrolyte distribution and enhances the solidification consistency and assembly efficiency of semi-solid-state batteries by systematically controlling the assembly process through equipment settings.

[0008] To address the problems of poor curing effect, uneven curing, poor wettability, poor cell consistency, and low production efficiency in existing in-situ solidification technologies, and to explore how to optimize these technologies, this invention provides a semi-solid-state battery assembly method. By integrating in-situ curing into the cell assembly process, this method effectively solves the problem of poor curing consistency caused by traditional curing processes, resulting in good curing effect and consistency. Furthermore, it reduces process steps, improves production efficiency, and lowers manufacturing costs.

[0009] Technical solution

[0010] To solve the above problems, the technical solution provided by the present invention is as follows:

[0011] A semi-solid-state battery assembly system includes a sequentially arranged feeding mechanism, comprising two sets of electrode feeding mechanisms, a set of separator feeding mechanisms, and an electrode carrier feeding mechanism for synchronous feeding, wherein the electrode feeding mechanisms are located on both sides of the separator feeding mechanism; a cutting mechanism, which cooperates with the feeding mechanisms to cut the electrodes; a spraying mechanism, which has two sets and multiple sets of drive rollers, wherein the nozzles of the spraying mechanism spray an in-situ curing electrolyte toward the inner side of the electrode conveyed by the drive rollers and the two sides of the separator conveyed by the separator feeding mechanism; and an irradiation mechanism, which applies ultraviolet light. External light is used to cure the in-situ cured electrolyte, with the ultraviolet light directed towards the area where the in-situ cured electrolyte has been sprayed. The forming mechanism includes a heating device, a pressure roller, and upper and lower pressure plates. The heating device and the pressure roller perform a second curing process of heating and pressurizing the electrode and the diaphragm. An additional spraying mechanism and an irradiation mechanism are provided in front of the upper and lower pressure plates. The spraying mechanism sprays the in-situ cured electrolyte towards the outside of the electrode, and the irradiation mechanism applies ultraviolet light to the outside of the electrode. The upper and lower pressure plates heat and press the cured electrode and diaphragm integrated unit together.

[0012] Improved electrolyte distribution uniformity: By setting up spraying mechanisms at different stages to directly spray in-situ cured electrolyte onto the inner side of the electrode and both sides of the separator, combined with a precisely controlled nozzle design, the electrolyte can be uniformly coated inside the battery, avoiding the unevenness problems that may be caused by the traditional immersion method, and improving the consistency and stability of battery performance.

[0013] Enhanced curing consistency: An ultraviolet (UV) irradiation system is used to cure the sprayed electrolyte in situ. This instant curing process quickly fixes the electrolyte's form, reducing inconsistencies in curing degree caused by time or location differences. In particular, an additional spraying and irradiation step is added before the heated and pressurized upper and lower plates, treating the outer surface of the electrode sheets, ensuring a uniform and thorough curing process for the entire battery, thus improving battery stability and safety.

[0014] Improving assembly efficiency: The system's feeding, cutting, spraying, irradiation, and molding mechanisms are sequentially arranged, achieving a high degree of automation and continuous operation. This reduces manual intervention, ensuring assembly accuracy while significantly improving production efficiency. Through the orderly control of the equipment, each step is closely linked, shortening the conversion time from battery materials to finished product.

[0015] Optimized process flow: This system integrates multiple key processes into one unit. The integrated design not only simplifies the manufacturing process of semi-solid-state batteries but also effectively reduces material waste and production costs. In particular, the use of heating devices and pressure rollers for a second curing process during the molding stage further enhances the integrity of the battery structure, ensuring the reliability of the battery in subsequent use.

[0016] Optionally, the drive roller can be brought closer to the heating device to reduce the distance between the two sets of electrode plates.

[0017] The electrode spacing is controlled by drive rollers to adjust its path. The tight interlayer arrangement helps form a more uniform and dense battery structure during final lamination and curing, reducing internal voids and improving the sealing and stability of the encapsulation. This is crucial for preventing electrolyte leakage and extending battery life. By precisely controlling the electrode spacing before heating and pressurization, subsequent heat treatment conditions, such as temperature and pressure settings, can be better matched, ensuring a more efficient and uniform curing process and further improving the consistency of battery performance. A reasonable electrode spacing also reduces the risk of excessive material deformation during pressurization, protecting the fragile separator from damage and maintaining the integrity of the battery structure. This is particularly important for the long-term stable operation of semi-solid-state batteries.

[0018] Alternatively, the drive rollers can be brought closer to the diaphragm from both sides toward the center.

[0019] The separator itself is located in the middle, which avoids the separator being touched or affected by the electrode or other drive rollers, reduces the risk of excessive material deformation during pressurization, protects the fragile separator from damage, and maintains the integrity of the battery structure.

[0020] Optionally, the feeding mechanism includes a first conveyor roll, a second conveyor roll, a diaphragm roll, and a carrier roll. The diaphragm roll is located at the center, and the first and second conveyor rolls are located on both sides of the diaphragm roll. The carrier roll has two sets and is attached to the electrode sheets of the first and second conveyor rolls respectively.

[0021] Centrally symmetrical layout: The diaphragm roll is placed in the center, while the first and second conveyor rolls (i.e., two sets of electrode feeding mechanisms) are arranged on both sides of the diaphragm roll. This design is conducive to achieving symmetry and balance in material conveying, ensuring that the electrode and diaphragm can be precisely aligned in subsequent processing, thereby improving the accuracy and efficiency of assembly.

[0022] Synchronization of bipolar electrode feeding: By having two sets of electrode feeding mechanisms work simultaneously, the feeding speed and position of the electrodes on both sides can be synchronized. This is crucial for semi-solid-state batteries that require high-precision stacked structures, reducing the risk of layer misalignment or uneven gaps caused by asynchronous feeding.

[0023] Dual configuration of carrier rolls: The carrier rolls are designed in two sets, which are attached to the electrode sheets of the first and second conveyor rolls respectively. This design can effectively support and guide the flatness and stability of the electrode sheets during the feeding process, reduce the generation of bending or wrinkles, and further improve the positioning accuracy of the electrode sheets during the assembly process and the overall quality of the battery.

[0024] Facilitates automated control: This symmetrical and integrated feeding mechanism layout is well-suited to the requirements of automated production lines. It is easy to achieve precise control through programming, including speed adjustment and position alignment, which improves the automation level and production efficiency of the production process, while also reducing the error rate of manual operation.

[0025] Optionally, the pressure roller is provided with a carrier roll for recycling the carrier.

[0026] Improved resource utilization: The carrier roll is recycled at the pressure roller, which means that after the electrode sheet is transferred and positioned, these carriers can be automatically collected and reused, reducing the use of consumables in the production process, lowering production costs, and also benefiting the environment.

[0027] Optimize the production process: By automatically recycling the carrier, the separation and recycling of the carrier can be carried out without manual intervention, reducing downtime between processes, making the production process more continuous and smooth, and improving the overall production efficiency.

[0028] Optionally, the carrier and electrode are attached via the drive roller, which is provided with a parallel roller group, and the carrier and electrode on the parallel roller group are perpendicular to the nozzle of the spraying mechanism and the ultraviolet irradiation direction of the irradiation mechanism.

[0029] Precise positioning and attachment: The carrier and electrode are attached via drive rollers, and the use of parallel roller sets ensures the flatness and stability of the electrode during transport, contributing to a firm and precise bond between the electrode and the carrier. This provides a good substrate for subsequent spraying and irradiation steps, guaranteeing processing accuracy.

[0030] Optimized spraying and illumination direction: The carrier and electrodes on the parallel roller assembly are designed perpendicular to the nozzles of the spraying mechanism and the UV light direction of the irradiation mechanism. This layout allows the in-situ cured electrolyte to more evenly cover the electrode and separator surfaces, avoiding uneven spraying or insufficient illumination caused by improper angles. The vertical orientation maximizes the spraying area and light contact surface, ensuring uniform electrolyte curing and improving the consistency of battery performance.

[0031] Improved production efficiency and quality: This design not only improves the efficiency of spraying and curing, as the vertical orientation facilitates faster and more uniform material processing, but also reduces material waste and increases the yield. Furthermore, it allows for precise control of the spraying amount and light intensity, further ensuring the reliability and stability of the battery.

[0032] Optionally, the upper and lower pressure plates are alternately stacked and cured into an integrated unit of electrode diaphragm, with the diaphragm in a continuous Z-shaped folded form.

[0033] The lamination unit has high production efficiency, good alignment control between electrodes, high lamination quality, and is less prone to defects such as diaphragm folding.

[0034] A method for assembling a semi-solid-state battery includes the following steps:

[0035] S1. Prepare the positive electrode, negative electrode, carrier, and separator;

[0036] Prepare the ingredients.

[0037] S2. Attach the cut positive electrode sheet and negative electrode sheet to the carrier to form an integrated positive electrode sheet and an integrated negative electrode sheet;

[0038] It primarily provides an attachment layer for the electrode, preventing direct contact with the electrode and thus avoiding interference with processes such as spraying. Protecting the electrode: By adding a carrier layer between the electrode and direct processing tools (such as spraying and rolling), it effectively prevents physical damage to the electrode during processing, such as scratches or bending, which is especially important for fragile electrode materials. This ensures the integrity and performance of the electrode even in high-intensity automated production environments.

[0039] Improving processing precision: The carrier provides a stable substrate, which keeps the electrode in place during subsequent processes such as spraying and rolling, avoiding processing errors caused by electrode movement or sliding, and improving processing precision and consistency, which is crucial for building high-performance battery structures.

[0040] Optimizing the process flow: Using a carrier simplifies operation steps. For example, when spraying electrolyte, the carrier helps control the distance between the electrode and the nozzle, ensuring uniform spraying. Simultaneously, during curing, the carrier facilitates the uniform transfer of heat and pressure, improving the curing effect. Furthermore, the design of the substrate can be easily adjusted as needed to accommodate different electrode sizes and shapes.

[0041] Facilitates automated processing: The presence of the carrier facilitates gripping and handling by robotic arms or other automated equipment, especially in high-speed production lines, which can significantly improve production efficiency, reduce manual intervention, and lower manufacturing costs.

[0042] S3. Spray in-situ curing electrolyte on both sides of the electrode side and the diaphragm of the integrated positive electrode carrier and the integrated negative electrode carrier. Then, irradiate the side with the in-situ curing electrolyte with ultraviolet light to cure it.

[0043] By integrating in-situ curing into the cell assembly process, the problem of poor curing consistency caused by traditional curing processes is effectively solved. Furthermore, the first curing of the electrode and separator is achieved through a spraying and irradiation mechanism, enabling the electrode and separator to bond together. This eliminates the need for adhesive coating design in the separator to achieve bonding, thus reducing costs.

[0044] S4. Heat and press the integrated positive electrode carrier, separator and negative electrode carrier in the order of separator in order to press them into a pre-electrode separator integrated unit, and separate and recycle the carrier.

[0045] Secondary curing is achieved through heating and pressurization. Environmental protection and cost savings: If the selected carrier material is recyclable or reusable, waste generation during production can be reduced, aligning with green production principles and lowering long-term production costs. Furthermore, the heating and pressurization process simultaneously assembles the electrodes and separator, achieving two goals at once: improving production efficiency and reducing manufacturing costs.

[0046] S5. Spray the pre-electrode diaphragm integrated unit with in-situ cured electrolyte on both sides and irradiate with ultraviolet light.

[0047] Before molding, both sides of the pre-electrode separator integrated unit are cured to facilitate the subsequent formation of the molded cell and to serve as an adhesive.

[0048] S6. Multiple pre-electrode membrane units that have been cured are heated and pressed together to form a molded battery cell.

[0049] The lamination unit has high production efficiency, good alignment control between electrodes, high lamination quality, and is less prone to defects such as diaphragm folding, thus forming a shaped battery cell.

[0050] Optionally, the in-situ curing electrolytes sprayed on the integrated positive electrode carrier and the integrated negative electrode carrier are different. The in-situ curing electrolyte sprayed on the integrated positive electrode carrier is suitable for the positive electrode, and the in-situ curing electrolyte sprayed on the integrated negative electrode carrier is suitable for the negative electrode.

[0051] Chemical compatibility: Positive and negative electrode materials differ in chemical properties. For example, positive electrodes typically use materials such as lithium cobalt oxide and lithium nickel cobalt manganese oxide, while negative electrodes often use graphite and silicon-based materials. Therefore, their reactivity and stability requirements with electrolytes differ. Using electrolytes specifically optimized for either the positive or negative electrode can better match material characteristics, promote electrochemical reactions, and improve battery energy density and cycle stability.

[0052] Optimize electrochemical performance: Specifically designed electrolytes can improve interfacial compatibility and reduce side reactions, such as reducing metal ion dissolution on the positive electrode side and reducing lithium dendrite formation on the negative electrode side, thereby reducing internal resistance and improving battery safety and cycle life.

[0053] Improving battery efficiency: Customized electrolyte formulations can optimize ion conductivity and electron conduction pathways. The composition of the electrolyte, such as the selection and concentration of additives, can be adjusted according to the needs of different electrodes to achieve the best conductivity and electrochemical window, thereby improving the battery's charge and discharge efficiency and power density.

[0054] Enhanced safety: The electrolyte design, tailored to the characteristics of the positive and negative electrode materials, can suppress side reactions under harsh conditions such as overcharging and high temperatures to a certain extent, reduce the risk of gas evolution and thermal runaway, and improve the overall safety performance of the battery.

[0055] Alternatively, the carrier may be a PET sheet.

[0056] Good mechanical strength and flexibility: PET material has high mechanical strength and good flexibility, which makes it a stable substrate to support active materials, while allowing the battery to bend or fold without damaging the internal structure.

[0057] Chemical stability: PET is a polymer with high chemical stability. It is not prone to adverse chemical reactions with other battery components, reducing side reactions and helping to improve the safety of battery assembly.

[0058] Excellent insulation properties: As a non-conductive material, PET can effectively isolate and protect the battery electrodes.

[0059] Transparency and Processability: PET material has high transparency, facilitating optical inspection and monitoring of the battery's internal state. Furthermore, PET is easily processed into various shapes and sizes to meet diverse design requirements, and surface treatments facilitate the coating and adhesion of active materials.

[0060] Environmental friendliness: Compared to some other plastics, PET has certain advantages in recycling, which is in line with the trend of sustainable development. Attached Figure Description

[0061] Figure 1 This is a schematic diagram of a semi-solid-state battery assembly system proposed in an embodiment of the present invention;

[0062] 1. First conveyor roll; 2. Second conveyor roll; 3. Diaphragm roll; 4. PET roll; 5. Cutting mechanism; 6. Conveyor roller; 7. Liquid storage tank one; 8. Liquid storage tank two; 9. Liquid storage tank three; 10. Nozzle; 11. Irradiation mechanism; 12. First electrode; 13. Second electrode; 14. Heating device; 15. Pressure roller; 16. Cell assembly unit; 17. Molded cell; 18. Upper and lower pressure plates. Detailed Implementation

[0063] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings and embodiments.

[0064] Example

[0065] Combined with appendix Figure 1 A semi-solid-state battery assembly system includes a controller (not shown in the figure), a feeding mechanism, a cutting mechanism 5, a spraying mechanism, an irradiation mechanism 11, a forming mechanism, and a traction mechanism. The traction mechanism is a conveyor roller 6, which is connected to a servo motor.

[0066] The feeding mechanism, cutting mechanism 5, spraying mechanism, and irradiation mechanism 11 are arranged sequentially, and the feeding mechanism, cutting mechanism 5, spraying mechanism, irradiation mechanism 11, and forming mechanism are arranged in the first horizontal direction ( Figure 1 Arranged sequentially in the left direction.

[0067] The feeding mechanism includes two sets of electrode feeding mechanisms for synchronous feeding, one set of diaphragm feeding mechanism, and one electrode carrier feeding mechanism. The electrode feeding mechanisms are located on both sides of the diaphragm feeding mechanism. The carrier is a PET sheet. The feeding mechanism includes a first conveyor roll 1, a second conveyor roll 2, a diaphragm roll 3, and a PET roll 4. The PET roll 4 includes two PET feeding rolls, located on the upper and lower sides of the first conveyor roll 1 and the second conveyor roll 2, respectively, to complete the feeding process of the cut first electrode 12 and second electrode 13.

[0068] The cutting mechanism 5 works in conjunction with the feeding mechanisms 1 and 2 to cut the electrode sheets.

[0069] The spraying mechanism comprises two sets of transmission rollers 6, which work in conjunction with multiple sets of transmission rollers 6. The nozzles of the spraying mechanism spray in-situ cured electrolyte towards the inner side of the electrode sheet conveyed by the transmission rollers 6 and both sides of the diaphragm conveyed by the diaphragm feeding mechanism. The spraying mechanism includes a storage tank 7 matching the first conveyor roll 1, a storage tank 8 matching the second conveyor roll 2, a storage tank 9 matching the diaphragm roll, and nozzles 10. The in-situ cured electrolytes sprayed on the integrated positive electrode carrier and the integrated negative electrode carrier are different; the in-situ cured electrolyte sprayed on the integrated positive electrode carrier is adapted to the positive electrode sheet, and the in-situ cured electrolyte sprayed on the integrated negative electrode carrier is adapted to the negative electrode sheet. The storage tanks can store in-situ solidified electrolytes with different formulations according to the polarity of the corresponding electrode sheet and the diaphragm. The nozzles 10 can move along the length and width directions of the electrode sheet and the diaphragm to achieve uniform surface coverage. The spraying mechanism contains in-situ curing electrolytes with different formulations depending on the polarity of the matched electrode rolls (e.g., positive or negative). If the first feed roll 1 is the positive electrode, the first storage tank 7 contains an in-situ curing electrolyte with oxidation-resistant properties; if the second feed roll 2 is the negative electrode, the second storage tank 8 contains an in-situ curing electrolyte with reduction-resistant properties. This allows for matching the appropriate electrolyte according to the electrode roll polarity, ensuring optimal cell performance. The third storage tank 9 contains a mixture of the solutions from the first and second storage tanks 7 and is sprayed onto the diaphragm.

[0070] The irradiation mechanism 11 applies ultraviolet light to cure the in-situ curing electrolyte, with the ultraviolet light directed towards the area where the in-situ curing electrolyte has been sprayed. The irradiation mechanism 11 includes an ultraviolet light generator, the wavelength range of which can be adjusted according to process requirements. The wavelength range of the ultraviolet light is 190-400 nm, specifically 190 nm, 300 nm, or 400 nm.

[0071] The forming mechanism includes a heating device 14, a pressure roller 15, and upper and lower pressure plates 18. The heating device 14 and the pressure roller 15 perform a second curing process of heating and pressurizing the electrode and the separator. An additional spraying mechanism 7, 8 and an irradiation mechanism 11 are provided in front of the upper and lower pressure plates 18. The spraying mechanism 7, 8 sprays in-situ curing electrolyte towards the outside of the electrode. The irradiation mechanism 11 applies ultraviolet light to the outside of the electrode. The upper and lower pressure plates 18 heat and press the cured electrode and separator integrated unit together.

[0072] The transmission roller 6 moves closer to the heating device 14, bringing the two sets of electrode plates closer together.

[0073] The drive rollers 6 move from both sides toward the diaphragm in the center.

[0074] The feeding mechanism includes a first conveyor roll 1, a second conveyor roll 2, a diaphragm roll 3, and a carrier roll 4. The diaphragm roll 3 is located at the center, and the first conveyor roll 1 and the second conveyor roll 2 are located on both sides of the diaphragm roll 3. The carrier roll 4 is provided with two sets and is attached to the electrode sheets of the first conveyor roll 1 and the second conveyor roll 2 respectively.

[0075] The pressure roller 15 is provided with a carrier roll 4 for recycling the carrier.

[0076] The carrier and electrode are attached by the drive roller 6, which is provided with a parallel roller group. The carrier and electrode on the parallel roller group are perpendicular to the nozzle of the spraying mechanism and the ultraviolet irradiation direction of the irradiation mechanism 11.

[0077] The upper and lower pressure plates 18 are used to alternately press and solidify the electrode diaphragm integrated unit, and the diaphragm is in the form of a continuous Z-shaped fold.

[0078] The feeding mechanism, cutting mechanism 5, spraying mechanism, irradiation mechanism 11, and forming mechanism are arranged sequentially in a first horizontal direction. The feeding mechanism is used to convey the first conveyor roll 1, the second conveyor roll 2, the diaphragm roll 3, and the PET roll 4 along the first horizontal direction. The cutting mechanism 5 is used to cut the first conveyor roll 1 and the second conveyor roll 2 to form the first electrode 12 and the second electrode 13. The spraying mechanism is used to spray an electrolyte solution containing polymer monomers and initiators onto the cut first electrode 12, second electrode 13, and diaphragm tape. The irradiation mechanism 11 is used to apply ultraviolet light to the sprayed first electrode 12, second electrode 13, and diaphragm tape to complete the first curing of the polymer. The forming mechanism is used to apply heat and pressure to the first cured first electrode 12, second electrode 13, and diaphragm tape to assemble the first electrode 12, second electrode 13, and diaphragm tape to form an assembly unit and to perform a second curing. In addition, the forming mechanism is also used to apply heat and pressure to the finally formed battery cell. The traction mechanism is used to clamp and pull the first electrode 12, second electrode 13, diaphragm belt, PET belt, and assembly unit output by the feeding mechanism along the first horizontal direction. The controller is used to control the cutting mechanism 5 to cut the first conveyor roll 1 and the second conveyor roll 2 when the traction mechanism pulls the first conveyor roll 1 and the second conveyor roll 2 a preset distance. Furthermore, the controller is also used to control the spraying mechanism to complete the spraying of the first electrode 12, second electrode 13, and diaphragm belt according to a preset when the first electrode 12, second electrode 13, and diaphragm belt are conveyed to the spraying mechanism. The controller is also used to control the irradiation mechanism 11 to complete the ultraviolet irradiation of the first electrode 12, second electrode 13, and diaphragm belt according to a preset when the first electrode 12, second electrode 13, and diaphragm belt are conveyed to the irradiation mechanism 11.

[0079] A method for assembling a semi-solid-state battery includes the following steps:

[0080] S1. Prepare the positive electrode, negative electrode, carrier, and separator;

[0081] S2. Attach the cut positive electrode sheet and negative electrode sheet to the carrier to form an integrated positive electrode sheet and an integrated negative electrode sheet;

[0082] S3. Spray in-situ curing electrolyte on both sides of the electrode side and the diaphragm of the integrated positive electrode carrier and the integrated negative electrode carrier. Then, irradiate the side with the in-situ curing electrolyte with ultraviolet light to cure it.

[0083] S4. Heat and press the integrated positive electrode carrier, separator and negative electrode carrier in the order of separator in order to press them into a pre-electrode separator integrated unit, and separate and recycle the carrier.

[0084] S5. Spray the pre-electrode diaphragm integrated unit with in-situ cured electrolyte on both sides and irradiate with ultraviolet light.

[0085] S6. Multiple pre-electrode separator units, after being heated and pressurized, are stacked together to form a molded battery cell. This stacking method has been disclosed in patent CN114551960B – a lithium-ion battery stacking unit and its preparation method, and a lithium-ion battery containing the same. The specification states: "In the preparation of the stacking unit, the positive and negative electrode sheets are respectively bonded to corresponding positions on both sides of a continuous separator to form several sets of electrode pairs. This makes it easy to control the relative positions between two adjacent positive and negative electrode sheets. Furthermore, bonding the positive and negative electrode sheets to the continuous separator prevents the positions of the positive and negative electrode sheets from shifting during subsequent stacking, which is beneficial to improving the stacking accuracy. Then, the continuous separator is folded in a Z-shape between each electrode pair to obtain the stacking unit. The distance between each electrode pair can be adjusted and controlled according to the stacking requirements. The stacking unit has high production efficiency, good alignment control between electrodes, high stacking quality, and is less prone to defects such as separator folding."

[0086] When the system starts working, the first conveyor roll 1, the second conveyor roll 2, and the diaphragm roll 3 are fed into the system by the feeding mechanism. The cutting mechanism 5, under the control of the controller, cuts the first conveyor roll 1 and the second conveyor roll 2 to obtain the first electrode 12 and the second electrode 13. At this time, the PET roll 4 is fed into the system by the feeding mechanism, and the obtained first electrode 12 and second electrode 13 continue to work to the right under the support of the PET roll 4. When the first electrode 12 and the second electrode 13 are conveyed to the spraying mechanism station, the liquid storage tank 1 7, under the control of the controller, sprays the in-situ curing electrolyte onto the lower surface of the first electrode 12 through the nozzle 10. The liquid storage tank 2 8, under the control of the controller, sprays the in-situ curing electrolyte onto the upper surface of the second electrode 13 through the nozzle 10. The liquid storage tank 3 9, under the control of the controller, sprays the in-situ curing electrolyte onto the upper and lower surfaces of the diaphragm roll 3 through the nozzle 10. When the first electrode 12, the second electrode 13, and the diaphragm roll 3, after being sprayed, are conveyed to the irradiation mechanism 11, the irradiation mechanism 11, under the action of the controller, applies ultraviolet light to the lower surface of the first electrode 12, the upper surface of the second electrode 13, and the upper and lower surfaces of the diaphragm roll 3, causing the in-situ curing electrolyte after spraying to undergo a polymerization and curing reaction, completing the first curing of the lower surface of the first electrode 12, the upper surface of the second electrode 13, and the upper and lower surfaces of the diaphragm roll 3. The system continues to convey to the right, and when it reaches the heating device 14, a certain temperature is applied to the first electrode 12, the second electrode 13, and the diaphragm roll 3. Then, when it reaches the pressure roller 15, a certain pressure is applied to the first electrode 12, the second electrode 13, and the diaphragm roll 3, resulting in the cell assembly unit 16 and completing the second curing of the lower surface of the first electrode 12, the upper surface of the second electrode 13, and the upper and lower surfaces of the diaphragm roll 3. The system continues to move to the right, arriving at the spraying mechanism station. Under the control of the controller, reservoir 7 sprays in-situ curing electrolyte onto the upper surface of the first electrode 12 through nozzle 10. Reservoir 8, under the control of the controller, sprays in-situ curing electrolyte onto the lower surface of the second electrode 13 through nozzle 10. Then, under the control of the controller, irradiation mechanism 11 applies ultraviolet light to the upper surface of the first electrode 12 and the lower surface of the second electrode 13, causing the sprayed in-situ curing electrolyte to undergo a polymerization and curing reaction, completing the first curing of the upper surface of the first electrode 12 and the lower surface of the second electrode 13. The system continues to operate, assembling the cell assembly unit 16 into the final shaped cell 17. The final shaped cell 17, under the heating and pressurizing action of the upper and lower pressure plates 18, completes the second curing of the upper surface of the first electrode 12 and the lower surface of the second electrode 13, and the final assembly of the cell.

[0087] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A semi-solid-state battery assembly system, characterized in that, Including sequential settings The feeding mechanism (1, 2, 3, 4) includes two sets of electrode feeding mechanisms, one set of diaphragm feeding mechanism and electrode carrier feeding mechanism that feed synchronously, with the electrode feeding mechanism located on both sides of the diaphragm feeding mechanism; The cutting mechanism (5) cooperates with the feeding mechanism (1, 2) to cut the electrode sheet; The spraying mechanism (7, 8, 9, 10) is provided with two sets and multiple sets of transmission rollers (6) in cooperation. The nozzles of the spraying mechanism (7, 8, 9, 10) spray in-situ cured electrolyte towards the inner side of the electrode conveyed by the transmission rollers (6) and both sides of the diaphragm conveyed by the diaphragm feeding mechanism. Irradiation mechanism (11) applies ultraviolet light to cure the in-situ curing electrolyte, with the ultraviolet light directed toward the position where the in-situ curing electrolyte has been sprayed; The forming mechanism (14, 15, 18) includes a heating device (14), a pressure roller (15), and upper and lower pressure plates (18). The heating device (14) and the pressure roller (15) perform a second curing of the electrode and the diaphragm by heating and pressurizing. An additional spraying mechanism (7, 8) and an irradiation mechanism (11) are provided in front of the upper and lower pressure plates (18). The spraying mechanism (7, 8) sprays in-situ curing electrolyte towards the outside of the electrode. The irradiation mechanism (11) applies ultraviolet light to the outside of the electrode. The upper and lower pressure plates (18) heat and press the cured electrode and diaphragm integrated unit. The transmission roller (6) moves closer to the heating device (14) to reduce the distance between the two sets of electrode plates; The drive roller (6) approaches the diaphragm from both sides toward the center; the pressure roller (15) is provided with a carrier roll (4) for recycling the carrier.

2. The semi-solid-state battery assembly system according to claim 1, characterized in that, The feeding mechanism (1, 2, 3, 4) includes a first conveyor roll (1), a second conveyor roll (2), a diaphragm roll (3) and a carrier roll (4). The diaphragm roll (3) is located in the center, and the first conveyor roll (1) and the second conveyor roll (2) are located on both sides of the diaphragm roll (3). The carrier roll (4) is provided with two sets and is attached to the electrode sheets of the first conveyor roll (1) and the second conveyor roll (2) respectively.

3. The semi-solid-state battery assembly system according to claim 2, characterized in that, The carrier and electrode are attached by the drive roller (6), which is provided with a parallel roller group. The carrier and electrode on the parallel roller group are perpendicular to the nozzle of the spraying mechanism (7, 8, 9, 10) and the ultraviolet irradiation direction of the irradiation mechanism (11).

4. The semi-solid-state battery assembly system according to claim 1, characterized in that, The upper and lower pressure plates (18) are stacked alternately to form an integrated unit of electrode diaphragm after curing, and the diaphragm is in the form of a continuous Z-shaped fold.

5. A method for assembling a semi-solid-state battery, characterized in that, A semi-solid-state battery assembly system according to any one of claims 1 to 4 includes the following steps: S1. Prepare the positive electrode, negative electrode, carrier, and separator; S2. Attach the cut positive and negative electrode sheets to the carrier to form an integrated positive electrode sheet and an integrated negative electrode sheet; S3. Spray in-situ curing electrolyte on both sides of the electrode side and the diaphragm of the integrated positive electrode carrier and the integrated negative electrode carrier. Then, irradiate the side with the in-situ curing electrolyte with ultraviolet light to cure it. S4. Heat and press the integrated positive electrode carrier, separator and negative electrode carrier in the order of separator in order to press them into a pre-electrode separator integrated unit, and separate and recycle the carrier. S5. Spray the pre-electrode diaphragm integrated unit with in-situ cured electrolyte on both sides and irradiate with ultraviolet light. S6. Multiple pre-electrode membrane units that have been cured are heated and pressed together to form a molded battery cell.

6. A semi-solid-state battery assembly method according to claim 5, characterized in that, The in-situ curing electrolytes sprayed on the integrated positive electrode carrier and the integrated negative electrode carrier are different. The in-situ curing electrolyte sprayed on the integrated positive electrode carrier is suitable for the positive electrode, while the in-situ curing electrolyte sprayed on the integrated negative electrode carrier is suitable for the negative electrode.

7. A semi-solid-state battery assembly method according to claim 5, characterized in that, The carrier is a PET sheet.

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