Composite solid electrolyte membrane preparation device and preparation method

Abstract

The present invention relates to the field of battery processing, and specifically to a composite solid electrolyte membrane preparation device and preparation method. It includes a main frame, and the upper and lower sides of the main frame are respectively provided with a main unwinding mechanism and a secondary unwinding mechanism. The pressing mechanism beside the main frame is used to press the support film and the silicone oil paper; the main coating mechanism sprays the slurry onto the silicone oil paper; the main oven at the lower end of the main unwinding mechanism heats the pressed material; the secondary coating mechanism next to the main oven sprays the material again; the secondary coating mechanism is provided next to the secondary coating mechanism for reheating the material; the preheating mechanism at the upper end of the main coating mechanism preheats the support film; the cleaning mechanism connected thereto includes a number of main rollers, a number of adhesive rollers and a number of rotation mechanisms, and each main roller has a number of adhesive rollers in a circumferential array on the side, and a rotation mechanism is provided at both ends of each main roller. This device can efficiently complete the processes of pressing, coating, heating and the like of the material, improve production efficiency and product quality, and can clean the impurities on the support film and preheat the support film.

Description

Technical Field

[0001] The present invention relates to the field of battery processing, and in particular to a composite solid electrolyte membrane preparation device and preparation method. Background Art

[0002] Traditional composite solid electrolyte membrane preparation devices have many defects. In terms of material pretreatment, the cleaning treatment of basic materials such as support membranes and silicone oil paper is not fine enough, and it is often impossible to effectively remove tiny impurity particles on the surface of the support membrane. These impurities will be mixed inside the electrolyte membrane during the subsequent composite process, forming defect sites, which not only affects the flatness and density of the composite solid electrolyte membrane, but may also cause local uneven conductivity, reducing the battery's charge and discharge performance and overall performance stability.

[0003] In terms of coating technology, most existing devices use a single coating method, which makes it difficult to ensure the uniform distribution of the composite electrolyte slurry on the surface of the support membrane and silicone oil paper. This will cause the thickness of the composite solid electrolyte membrane to be inconsistent, and some areas may agglomerate due to excessive slurry, affecting the smoothness of the ion transmission channel; while too little slurry in some areas will damage the integrity of the composite solid electrolyte membrane and reduce the mechanical strength and barrier properties of the composite solid electrolyte membrane.

[0004] In addition, the traditional preparation equipment lacks an effective preheating and drying system. After coating the slurry, if the composite solid electrolyte membrane is not properly preheated and dried in time, the solvent will not evaporate completely, and the residual solvent may generate bubbles in the subsequent processing, destroying the structural integrity of the composite solid electrolyte membrane. It will also affect the interface compatibility between the composite solid electrolyte membrane and the electrode material, increase the internal resistance of the battery, and reduce the battery's charge and discharge efficiency and cycle life.

[0005] Moreover, the coordination between the various processes of the existing preparation device is poor, the linkage of the various mechanisms is not accurate and efficient enough, and it is easy to have inconsistent production rhythms, resulting in low production efficiency and difficulty in ensuring the consistency of product quality, which cannot meet the needs of large-scale industrial production for high-quality composite solid electrolyte membranes. Therefore, a new type of composite solid electrolyte membrane preparation device is urgently needed to overcome these defects, improve the preparation quality and production efficiency of composite solid electrolyte membranes, and promote the development of the new energy industry. Summary of the invention

[0006] Based on this, it is necessary to provide a composite solid electrolyte membrane preparation device and preparation method to address the existing technical problems.

[0007] In order to solve the problems of the prior art, the technical solution adopted by the present invention is:

[0008] A composite solid electrolyte membrane preparation device comprises a main frame, wherein the upper and lower sides of the main frame are respectively provided with a main unwinding mechanism for carrying a support film and a secondary unwinding mechanism for carrying silicone oil paper, and the device is characterized in that it also comprises:

[0009] A pressing mechanism is arranged beside the main frame and presses the support film and the silicone oil paper;

[0010] The main coating mechanism is arranged beside the main frame and sprays the composite electrolyte slurry onto the silicone oil paper;

[0011] The main oven is arranged at the lower end of the main unwinding mechanism and heats the pressed materials;

[0012] The secondary coating mechanism is arranged beside the main oven and sprays the composite electrolyte slurry onto the heated material;

[0013] Auxiliary oven, which is arranged beside the auxiliary coating mechanism and reheats the materials;

[0014] A preheating mechanism, which is arranged at the upper end of the main coating mechanism and preheats the supporting film before lamination;

[0015] The cleaning mechanism is connected to the preheating mechanism, and includes a plurality of rotation mechanisms and a plurality of impurity removal mechanisms. The impurity removal mechanism includes a main roller and a plurality of adhesive rollers. The plurality of main rollers are rotatably arranged beside the preheating mechanism, and the plurality of adhesive rollers are rotatably arranged in an array at equal angles along the circumferential direction of the main roller. A group of rotation mechanisms are respectively arranged at both ends of each main roller.

[0016] Furthermore, the cleaning mechanism also includes a main motor, a supporting roller, an auxiliary motor, a main magnetic disk, two main gear rings, two center disks and two positioning frames. Each rotation mechanism includes an auxiliary magnetic disk and a main gear. The two positioning frames are respectively fixedly connected to the support seat of the preheating mechanism. The supporting roller is rotatably arranged on the side close to the two positioning frames. The two center disks are respectively fixedly connected to the two ends of the supporting roller. The two main gear rings are respectively rotatably connected to the two center disks. The main motor is fixedly connected to one positioning frame, and the auxiliary motor is fixedly connected to the other positioning frame. The output end of the main motor is coaxially connected to one end of the supporting roller, the output end of the auxiliary motor is coaxially connected to the main magnetic disk, the auxiliary magnetic disk is rotatably connected to the corresponding center disk, and the auxiliary magnetic disk is connected to the main magnetic disk through magnetic transmission when coaxially arranged with the main magnetic disk. The main gear is coaxially connected to the auxiliary magnetic disk and meshes with the main gear ring. The two main gears coaxially arranged at the two ends of the supporting roller are coaxially connected, and the main gear is the input end of the rotation mechanism.

[0017] Furthermore, the rotation mechanism also includes a clamping frame, a clamping contact, a bonding frame, two limit pins and two clamping springs, one end of the clamping frame is fixedly connected to the center disk, the clamping contact is arranged at the end of the clamping frame away from the center disk, one end of the two limit pins is respectively fixedly connected to the clamping contact, and the other end is respectively slidably connected to the clamping frame, the two clamping springs are respectively sleeved on the outside of the two limit pins, one end of the clamping spring is fixedly connected to the clamping frame, and the other end is fixedly connected to the clamping contact, the two ends of the main roller are respectively rotatably connected to the two clamping contacts, the bonding frame is rotatably connected to the side of the clamping contact close to the bonding roller, the bonding frame is fixedly connected to the end of the main roller, and a plurality of bonding rollers are rotatably arranged in an array at equal angles along the circumferential direction of the bonding frame, and the bonding frame is the output end of the rotation mechanism.

[0018] Furthermore, the rotation mechanism also includes a main pulley, a belt, a secondary pulley and a tensioner. The main pulley is coaxially fixed to the input end of the rotation mechanism, the secondary pulley is coaxially fixed to the output end of the rotation mechanism, the main pulley and the secondary pulley are connected by a belt drive, and the tensioner is arranged on the side of the main pulley close to the secondary pulley and the output end is against the belt.

[0019] Furthermore, the impurity removal mechanism also includes a plurality of pressing frames, each main roller is fixedly connected with a plurality of pressing frames at equal angles along the circumferential direction, one end of the pressing frame is against the sticking roller, the main roller is formed with a plurality of grooves in an array at equal angles along the circumferential direction, one end of the plurality of grooves is respectively against the lower ends of the plurality of pressing frames, and the grooves are used to accommodate impurities scraped off the sticking roller by the pressing frames.

[0020] Furthermore, the preheating mechanism includes a steam cleaner, a guide plate, a liquid collecting tank and a dryer. The steam cleaner is fixedly arranged above the main coating mechanism and the output end is arranged downward. The guide plate is fixedly connected to the output end of the steam cleaner. The lower end of the guide plate is arc-shaped. The liquid collecting tank is arranged below the guide plate and collects water droplets formed by high-temperature steam. The dryer is arranged on the side of the steam cleaner close to the liquid collecting tank. The output end of the dryer is arranged in a horizontal state and dries the cleaned adhesive roller.

[0021] Furthermore, the preheating mechanism also includes an arc filter, which is arranged on the side of the liquid collecting tank away from the dryer and one end of which is fixed to the liquid collecting tank. The arc filter is against the sticking roller during the movement of the sticking roller, and the arc filter intercepts some impurities entrained by the hot air.

[0022] A method for preparing a composite solid electrolyte membrane also includes the following preparation steps:

[0023] S1: The support film is unwound by the main unwinding mechanism, and the silicone oil paper is unwound synchronously by the auxiliary unwinding mechanism; then, when the silicone oil paper passes through the main coating mechanism, the main coating mechanism uses an extrusion coating method to evenly spray the composite electrolyte slurry onto the silicone oil paper;

[0024] S2: Then the main roller and several adhesive rollers in the cleaning mechanism work together to effectively clean the impurities on the support film. The cleaned support film enters the preheating mechanism. Before the support film is pressed with the silicone oil paper, the preheating mechanism heats the support film to a predetermined first temperature range;

[0025] S3: The pressing mechanism presses the silicone oil paper and the support film after the above treatment tightly together; the pressed materials enter the main oven and are heated to a predetermined second temperature range in the main oven to preliminarily solidify the composite electrolyte slurry;

[0026] S4: the material coming out of the main oven passes through the secondary coating mechanism, and the secondary coating mechanism again coats the composite electrolyte slurry on the side of the support membrane away from the silicone oil paper by extrusion coating. Finally, the coated material enters the secondary oven and is reheated to a predetermined third temperature range in the secondary oven to completely solidify the composite electrolyte slurry;

[0027] S5: After the solidification, the composite solid electrolyte membrane is rolled up by an external rolling mechanism to obtain a finished composite solid electrolyte membrane.

[0028] Furthermore, the first temperature range is 40°C - 60°C, the second temperature range is 80°C - 100°C, and the third temperature range is 120°C - 150°C.

[0029] Furthermore, the extrusion coating controls the extrusion pressure of the composite electrolyte slurry to be between 0.5 MPa and 1.5 MPa, the coating thickness to be between 0.1 mm and 0.3 mm, and the wind speed of the hot air circulation in the main oven and the auxiliary oven to be between 1 m / s and 3 m / s.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] Firstly, the device can efficiently clean the support film through the main roller and several adhesive rollers, effectively remove impurities on the support film, and prevent impurities from forming defect sites in the composite electrolyte membrane, thereby ensuring the flatness and density of the composite solid electrolyte membrane and the smoothness of the ion transmission channel, thereby improving the conductivity uniformity and mechanical strength of the composite solid electrolyte membrane, improving the overall quality of the composite solid electrolyte membrane, and helping to improve the key indicators of the battery such as charge and discharge performance, cycle life and safety;

[0032] Second: This device can effectively clean and dry the adhesive roller by using a steam cleaner and a dryer, ensuring that the adhesive roller can still maintain good impurity adsorption capacity after repeated use, further ensuring the cleanliness of the support membrane, and providing a stable basic condition for the preparation of high-quality composite solid electrolyte membranes;

[0033] Third: The main coating mechanism and the auxiliary coating mechanism in this device adopt extrusion coating method, which can more accurately control the coating amount and distribution uniformity of the composite electrolyte slurry on the silicone oil paper and the support membrane, avoid the agglomeration and thickness inconsistency problems of the slurry, ensure the integrity and performance stability of the membrane, and effectively improve the quality of the composite solid electrolyte membrane. At the same time, it also improves the utilization rate of materials and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a front view of an embodiment;

[0035] Figure 2 yes Figure 1 A magnified view of the structure at center;

[0036] Figure 3 is a schematic diagram of the three-dimensional structure of an embodiment;

[0037] Figure 4 is a three-dimensional structural schematic diagram of the embodiment from another angle;

[0038] Figure 5 Schematic diagram of the three-dimensional structure of the preheating mechanism and the cleaning mechanism in the embodiment;

[0039] Figure 6 is a schematic diagram of the three-dimensional structure of the cleaning mechanism of the preheating mechanism in the embodiment from another angle;

[0040] Figure 7 Schematic diagram of the three-dimensional structure of the rotating mechanism and the impurity removing mechanism in the embodiment;

[0041] Figure 8 is a schematic diagram of the three-dimensional structure decomposition of the rotation mechanism in the embodiment;

[0042] Fig. 9 It is a half-section view of the main roller and several adhesive rollers in the embodiment.

[0043] The numbers in the figure are:

[0044] 1. Main frame; 2. Main unwinding mechanism; 3. Auxiliary unwinding mechanism; 4. Support film; 5. Silicone oil paper; 6. Laminating mechanism; 7. Main coating mechanism; 8. Adhesive rack; 9. Main oven; 10. Auxiliary coating mechanism; 11. Auxiliary oven; 12. Preheating mechanism; 14. Steam cleaner; 15. Guide plate; 16. Liquid collecting tank; 17. Dryer; 18. Curved filter; 19. Cleaning mechanism; 20. Main motor; 21. Carrying roller; 22. Center disk; 23, positioning frame; 24, auxiliary motor; 25, main magnetic disk; 26, main gear ring; 27, rotation mechanism; 28, auxiliary magnetic disk; 29, main gear; 30, main pulley; 31, belt; 32, auxiliary pulley; 33, tensioner; 34, limit pin; 35, clamping spring; 36, clamping contact; 37, clamping frame; 38, impurity removal mechanism; 39, main roller; 40, groove; 41, pressing frame; 42, adhesive roller. DETAILED DESCRIPTION

[0045] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0046] refer to Figures 1 to 9 A composite solid electrolyte membrane preparation device comprises a main frame 1, wherein the main frame 1 has a main unwinding mechanism 2 for carrying a support film 4 and a secondary unwinding mechanism 3 for carrying a silicone oil paper 5 respectively disposed on the upper and lower sides thereof, and further comprising:

[0047] A pressing mechanism 6 is arranged beside the main frame 1 and presses the support film 4 and the silicone oil paper 5;

[0048] The main coating mechanism 7 is arranged beside the main frame 1 and sprays the composite electrolyte slurry onto the silicone oil paper 5;

[0049] A main oven 9 is provided at the lower end of the main unwinding mechanism 2 and heats the pressed material;

[0050] The secondary coating mechanism 10 is arranged beside the main oven 9 and sprays the composite electrolyte slurry onto the heated material;

[0051] A secondary oven 11 is arranged beside the secondary coating mechanism 10 and is used to reheat the material;

[0052] A preheating mechanism 12 is disposed at the upper end of the main coating mechanism 7 and preheats the support film 4 before lamination;

[0053] The cleaning mechanism 19 is connected to the preheating mechanism 12, and includes a plurality of rotating mechanisms 27 and a plurality of impurity removal mechanisms 38. The impurity removal mechanism 38 includes a main roller 39 and a plurality of adhesive rollers 42. The plurality of main rollers 39 (such as Fig. 9As shown in the figure, the main roller 39 is rotatably arranged beside the preheating mechanism 12, and a plurality of adhesive rollers 42 are rotatably arranged in an array with equal angles along the circumferential direction of the main roller 39. A group of rotation mechanisms 27 are respectively arranged at both ends of each main roller 39.

[0054] When the device is in operation, the support film 4 is unwound by the main unwinding mechanism 2, and the silicone oil paper 5 is unwound by the auxiliary unwinding mechanism 3. When the silicone oil paper 5 passes through the main coating mechanism 7, the main coating mechanism 7 sprays the composite electrolyte slurry onto the silicone oil paper 5 by extrusion coating. After the cleaning mechanism 19 cleans the impurities on the support film 4 through the main roller 39 and a plurality of adhesive rollers 42, the preheating mechanism 12 preheats the support film 4 before the support film 4 is pressed. Then the pressing mechanism 6 presses the silicone oil paper 5 and the support film 4, and the pressed material (i.e., the pressed silicone oil paper 5 and the support film 4) is heated by the main oven 9. When the heated material passes through the auxiliary coating mechanism 10, the auxiliary coating mechanism 10 sprays the composite electrolyte slurry onto the side of the support film 4 away from the silicone oil paper 5 by extrusion coating. Then the material continues to be reheated and baked in the auxiliary oven 11 and is finally rolled up by the external winding mechanism.

[0055] In order to drive the several rotation mechanisms 27 to start, the following features are also specifically provided:

[0056] The cleaning mechanism 19 also includes a main motor 20, a bearing roller 21, an auxiliary motor 24, a main magnetic disk 25, two main gear rings 26, two center disks 22 and two positioning frames 23. Each rotation mechanism 27 includes an auxiliary magnetic disk 28 and a main gear 29. The two positioning frames 23 are respectively connected to the support seat of the preheating mechanism 12. The bearing roller 21 (such as Figure 7 The two center disks 22 are respectively fixedly connected to the two ends of the bearing roller 21, and the two main gear rings 26 are respectively connected to the two center disks 22. The main motor 20 is fixedly connected to one positioning frame 23, and the auxiliary motor 24 is fixedly connected to the other positioning frame 23. The output end of the main motor 20 is coaxially connected to one end of the bearing roller 21, and the output end of the auxiliary motor 24 is coaxially connected to the main magnetic disk 25 (refer to Figure 6), the auxiliary magnetic disk 28 is connected to the corresponding center disk 22 for rotation. When the auxiliary magnetic disk 28 is coaxially arranged with the main magnetic disk 25, it is connected to the main magnetic disk 25 through magnetic force. The main gear 29 is coaxially fixedly connected with the auxiliary magnetic disk 28 and meshed with the main gear ring 26. The two main gears 29 coaxially arranged at both ends of the bearing roller 21 are coaxially fixedly connected. The main gear 29 is the input end of the rotation mechanism 27. When driving a plurality of rotation mechanisms 27 to start, the auxiliary motor 24 starts and drives the auxiliary magnetic disk 28 to rotate through the main magnetic disk 25. After the auxiliary magnetic disk 28 rotates, it will drive the main gear 29 fixedly connected thereto to rotate. Since the main gears 29 coaxially fixedly arranged at both ends of the bearing roller 21, the two main gears 29 will rotate synchronously, and the main gear ring 26 meshed with the main gear 29 will also rotate. Since the main gears 29 in a plurality of rotation mechanisms 27 are meshed with the corresponding main gear ring 26, the main gears 29 in the remaining rotation mechanisms 27 will also rotate at this time.

[0057] When cleaning the adhesive roller 42, the main motor 20 is started and rotated through the bearing roller 21. When the bearing roller 21 rotates, it drives a number of rotation mechanisms 27 to switch. After the corresponding rotation mechanisms 27 drive a number of adhesive rollers 42 to leave the support film 4, the number of adhesive rollers 42 will be cleaned under the action of the preheating mechanism 12, thereby maintaining the cleanliness of the adhesive roller 42. In this process, when the center disk 22 rotates with the bearing roller 21, the main magnetic disk 25 and the corresponding auxiliary magnetic disk 28 will first interrupt the transmission until the next auxiliary magnetic disk 28 rotates to a state of being coaxially arranged with the main magnetic disk 25, and then the auxiliary magnetic disk 28 and the main magnetic disk 25 are connected through magnetic transmission.

[0058] In order to realize that the corresponding main roller 39 drives the plurality of adhesive rollers 42 to press against the support film 4, so as to clean the impurities attached to the support film 4, the following features are also specifically provided:

[0059] The rotating mechanism 27 also includes a clamping frame 37, a clamping contact 36, a bonding frame 8, two limit pins 34 and two clamping springs 35. One end of the clamping frame 37 is fixedly connected to the center disk 22 (refer to Figure 7 ), the abutting contact 36 is arranged at one end of the abutting frame 37 away from the center disk 22, and one end of the two limit pins 34 is respectively fixedly connected to the abutting contact 36 (refer to Figure 8), and the other end is respectively connected to the abutting frame 37 for sliding, two abutting springs 35 are respectively sleeved on the outside of the two limit pins 34, one end of the abutting spring 35 is fixedly connected to the abutting frame 37, and the other end is fixedly connected to the abutting contact 36, the two ends of the main roller 39 are respectively connected to the two abutting contacts 36 for rotation, the adhesive frame 8 is connected to the side of the abutting contact 36 close to the adhesive roller 42 for rotation, the adhesive frame 8 is fixedly connected to the end of the main roller 39, and a plurality of adhesive rollers 42 are arranged in an array with equal angles for rotation along the circumferential direction of the adhesive frame 8, and the adhesive frame 8 is the output end of the rotating mechanism 27. When the main roller 39 drives the adhesive roller 42 to abut against the support film 4 to clean impurities, the abutting spring 35 plays an important role in buffering and regulating. When the surface of the support film 4 is uneven or the thickness is slightly different, the pressing spring 35 can automatically adjust the pressure of the pressing contact 36 on the main roller 39 according to the actual situation, so that the adhesive roller 42 can always be in close and uniform contact with the support film 4, ensuring the effect of cleaning impurities. The two limit pins 34 limit the movement of the pressing contact 36.

[0060] In order to achieve the purpose that the rotation direction of the main roller 39 is opposite to the moving direction of the support film 4, and the plurality of adhesive rollers 42 can clean the impurities attached to the support film 4 while moving in a circle with the main roller 39, the following features are also specifically set:

[0061] The rotation mechanism 27 also includes a main pulley 30, a belt 31, a secondary pulley 32 and a tensioner 33. The main pulley 30 is coaxially fixedly connected to the main gear 29, the secondary pulley 32 is coaxially fixedly connected to the adhesive frame 8, the main pulley 30 and the secondary pulley 32 are connected by the belt 31, and the tensioner 33 is arranged on the side of the main pulley 30 close to the secondary pulley 32, and the output end is against the belt 31. After the main gear 29 rotates, the main gear 29 will drive the main pulley 30 to rotate, and the main pulley 30 will drive the secondary pulley 32 to rotate through the belt 31. After the secondary pulley 32 rotates, it will drive the adhesive frame 8 fixedly connected to it to rotate, and after the adhesive frame 8 rotates, it will drive the main roller 39 fixedly connected to it to rotate. In this process, the tensioner 33 ensures that the belt 31 remains taut.

[0062] At the same time, referring to the foregoing, it can be known that at this time, the rotation direction of the main roller 39 is opposite to the moving direction of the support film 4, that is, the relative movement speed between the adhesive roller 42 and the support film 4 increases, and the friction force also increases accordingly, which helps to better peel and adsorb stubborn impurities on the support film 4, that is, for some impurities with strong bonding force with the surface of the support film 4, such as sticky stains, tiny particles, etc., they can be removed more effectively. However, since the adhesive roller 42 is in contact with the support film 4, compared with directly using a large roller to rub against the support film 4 in the opposite direction, the pressure and friction force of a single small adhesive roller 42 on the support film 4 are relatively small, which can reduce the risk of scratching, abrasion or tensile deformation of the surface of the support film 4 during the cleaning process.

[0063] In order to ensure that the impurities on the adhesive rollers 42 can be collected after the adhesive rollers 42 abut against the support film 4, the following features are also specifically provided:

[0064] The impurity removal mechanism 38 also includes a plurality of pressing frames 41, each main roller 39 is fixedly connected with a plurality of pressing frames 41 at equal angles along the circumferential direction, one end of the pressing frame 41 is against the sticking roller 42, and the main roller 39 is formed with a plurality of grooves 40 in an array at equal angles along the circumferential direction, one end of the plurality of grooves 40 is respectively against the lower ends of the plurality of pressing frames 41, and the grooves 40 are used to accommodate impurities scraped off the sticking roller 42 by the pressing frames 41. After the sticky roller 42 absorbs the impurities, as the sticky roller 42 rotates, the pressing frame 41 can effectively intercept and collect the impurities, and the groove 40 allows the impurities to be more concentrated in a specific position (it should be noted that the impurities on the support film 4 are all lightweight foreign matter such as dust or debris, so the sticky roller 42 can stick them down by contacting them, and then when the pressing frame 41 scrapes these impurities, these impurities will stick to each other in the groove 40 to form a relatively stable whole, avoiding the impurities from being thrown out when the main roller 39 rotates. And the sticky impurities will also produce greater friction with the groove 40, and this friction will prevent the impurities from falling, ensuring that the impurities can be concentrated in the groove 40). When it is necessary to clean the impurities, it is convenient to deal with these concentrated areas later. This collection method does not need to rely on the falling of the impurities themselves or other passive methods, which improves the efficiency and reliability of impurity collection.

[0065] In order to supplement the specific structure of the preheating mechanism 12, the preheating mechanism 12 can clean the adhesive roller 42 by high-temperature steam, so that the adhesive roller 42 remains clean when it contacts the support film 4 next time. Specifically, the following features are also provided:

[0066] The preheating mechanism 12 includes a steam cleaner 14, a guide plate 15, a liquid collecting tank 16 and a dryer 17. The steam cleaner 14 is fixedly arranged above the main coating mechanism 7 and the output end is arranged downward. The guide plate 15 is fixedly connected to the output end of the steam cleaner 14. The lower end of the guide plate 15 is arc-shaped. The liquid collecting tank 16 is arranged below the guide plate 15 and collects water droplets formed by high-temperature steam. The dryer 17 is arranged on the side of the steam cleaner 14 close to the liquid collecting tank 16. The output end of the dryer 17 is arranged in a horizontal state and dries the cleaned adhesive roller 42. When the preheating mechanism 12 cleans the adhesive roller 42, the high-temperature steam generated by the steam cleaner 14 is evenly sprayed on the adhesive roller 42 through the guide plate 15. The high-temperature steam can soften and dissolve the impurities on the adhesive roller 42, making it easier to remove. The arc-shaped guide plate 15 design helps the steam to cover the surface of the adhesive roller 42 more concentratedly, thereby improving the cleaning effect. The liquid collecting tank 16 effectively collects the water droplets condensed from the steam to prevent the water droplets from falling on other equipment parts to cause damage or affect the production environment. The dryer 17 dries the adhesive roller 42 after steam cleaning to ensure that the adhesive roller 42 can quickly return to a dry state so that it can normally play the role of adsorbing impurities when it contacts the support film 4 next time.

[0067] In order to prevent the hot air from entraining some impurities and attaching them again to the supporting film 4 on the opposite side of the adhesive roller 42 and the dryer 17 when the dryer 17 dries the adhesive roller 42, the following features are also specifically provided:

[0068] The preheating mechanism 12 also includes an arc filter 18, which is arranged on the side of the liquid collecting tank 16 away from the dryer 17 and one end is fixedly connected to the liquid collecting tank 16. The arc filter 18 abuts against the sticky roller 42 during the movement of the sticky roller 42, and the arc filter 18 intercepts some impurities carried by the hot air. In the process of the dryer 17 drying the sticky roller 42, the flow of hot air will carry some impurities that have fallen off the sticky roller 42 but have not been completely removed. If these impurities drift to other places with the hot air, they will adhere to the sticky roller 42 again or contaminate the support film 4 on the opposite side of the dryer 17, affecting the product quality and the stability of the equipment operation. The setting of the arc filter 18 effectively solves this problem. When the sticky roller 42 contacts the arc filter 18 during the rotation process, the arc filter 18 can intercept the impurities carried by the hot air and keep them near the liquid collecting tank 16, which is convenient for subsequent unified cleaning.

[0069] However, in this process, the arc filter 18 is located on the side of the liquid collecting tank 16 away from the dryer 17 and one end is fixedly connected to the liquid collecting tank 16. This position design makes the impurities more inclined to fall toward the liquid collecting tank 16 under the action of gravity after being intercepted. Because the arc filter 18 is connected to the liquid collecting tank 16, the impurities can slide along the arc filter 18 into the liquid collecting tank 16, reducing the possibility of accumulation on the arc filter 18 and rebounding onto the adhesive roller 42.

[0070] A method for preparing a composite solid electrolyte membrane also includes the following preparation steps:

[0071] S1: The support film 4 is unwound by the main unwinding mechanism 2, and the silicone oil paper 5 is unwound synchronously by the auxiliary unwinding mechanism 3; then, when the silicone oil paper 5 passes through the main coating mechanism 7, the main coating mechanism 7 uses an extrusion coating method to evenly spray the composite electrolyte slurry onto the silicone oil paper 5;

[0072] S2: Then the main roller 39 and the plurality of adhesive rollers 42 in the cleaning mechanism 19 work together to effectively clean the impurities on the support film 4. The cleaned support film 4 enters the preheating mechanism 12. Before the support film 4 is pressed with the silicone oil paper 5, the preheating mechanism 12 heats the support film 4 to a predetermined first temperature range.

[0073] S3: The pressing mechanism 6 presses the silicone oil paper 5 and the support film 4 after the above treatment tightly together; the pressed materials enter the main oven 9, and are heated to a predetermined second temperature range in the main oven 9 to preliminarily solidify the composite electrolyte slurry;

[0074] S4: the material coming out of the main oven 9 passes through the secondary coating mechanism 10, and the secondary coating mechanism 10 again coats the composite electrolyte slurry on the side of the support membrane 4 away from the silicone oil paper 5 by extrusion coating. Finally, the coated material enters the secondary oven 11, and is reheated to a predetermined third temperature range in the secondary oven 11 to completely solidify the composite electrolyte slurry;

[0075] S5: After the solidification, the composite solid electrolyte membrane is rolled up by an external rolling mechanism to obtain a finished composite solid electrolyte membrane.

[0076] The first temperature range is 40°C - 60°C, the second temperature range is 80°C - 100°C, and the third temperature range is 120°C - 150°C.

[0077] The extrusion coating controls the extrusion pressure of the composite electrolyte slurry to be 0.5MPa-1.5MPa, the coating thickness to be 0.1mm-0.3mm, and the wind speed of the hot air circulation in the main oven 9 and the auxiliary oven 11 to be controlled to be 1m / s-3m / s.

[0078] The working principle of the device is that the support film 4 is unwound by the main unwinding mechanism 2, and the silicone oil paper 5 is unwound by the auxiliary unwinding mechanism 3. When the silicone oil paper 5 passes through the main coating mechanism 7, the main coating mechanism 7 sprays the composite electrolyte slurry onto the silicone oil paper 5 by extrusion coating. At the same time, the auxiliary motor 24 in the cleaning mechanism 19 is started, and the auxiliary magnetic disk 28 is driven to rotate through the main magnetic disk 25, and the auxiliary magnetic disk 28 drives the corresponding main gear ring 26 to rotate through the main gear 29, and finally realizes the synchronous response of multiple rotation mechanisms 27, thereby driving the main roller 39 to rotate. The rotation direction of the main roller 39 is opposite to the movement direction of the support film 4. The several adhesive rollers 42 on its circumference are tightly pressed against the support film 4 under the action of the pressing spring 35 and the pressing contact 36. As the main roller 39 moves circumferentially, the impurities on the support film 4 are cleaned, and the cleaned impurities are scraped off by the buckling frame 41 on the main roller 39 and collected in the groove 40 of the main roller 39.

[0079] Next, the steam cleaner 14 in the preheating mechanism 12 generates high-temperature steam, which is evenly sprayed on the adhesive roller 42 through the guide plate 15 to soften and dissolve impurities. The condensed water droplets are collected by the sump 16. Then the dryer 17 dries the adhesive roller 42. During the drying process, the arc filter 18 intercepts the impurities entrained by the hot air to ensure that the adhesive roller 42 is clean and dry.

[0080] After cleaning and preheating, the pressing mechanism 6 presses the silicone oil paper 5 and the support film 4. The pressed materials are heated by the main oven 9, and then when passing through the secondary coating mechanism 10, the secondary coating mechanism 10 sprays the composite electrolyte slurry to the side of the support film 4 away from the silicone oil paper 5 again. After that, the materials continue to be reheated and baked in the secondary oven 11, and finally rolled up by the external winding mechanism, thereby completing the preparation process of the composite solid electrolyte membrane. The various mechanisms of the entire device work together to ensure the high-quality preparation of the composite solid electrolyte membrane through a series of operations such as cleaning and preheating the support film 4 and coating, pressing, and heating the silicone oil paper 5 and the support film 4.

[0081] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A composite solid electrolyte membrane preparation device, comprising a main frame (1), wherein the main frame (1) is provided with a main unwinding mechanism (2) for carrying a support film (4) and a secondary unwinding mechanism (3) for carrying silicone oil paper (5) on the upper and lower sides thereof, respectively, wherein: Also includes: A pressing mechanism (6) is arranged beside the main frame (1) and presses the support film (4) and the silicone oil paper (5); A main coating mechanism (7) is arranged beside the main frame (1) and sprays the composite electrolyte slurry onto the silicone oil paper (5); A main oven (9) is arranged at the lower end of the main unwinding mechanism (2) and is used to heat the pressed material; A secondary coating mechanism (10) is arranged beside the main oven (9) and sprays the composite electrolyte slurry onto the heated material; A secondary oven (11), which is arranged beside the secondary coating mechanism (10) and is used to reheat the material; A preheating mechanism (12) is arranged at the upper end of the main coating mechanism (7) and is used to preheat the support film (4) before lamination; The cleaning mechanism (19) is connected to the preheating mechanism (12), and comprises a plurality of rotation mechanisms (27) and a plurality of impurity removal mechanisms (38). The impurity removal mechanism (38) comprises a main roller (39) and a plurality of adhesive rollers (42). The plurality of main rollers (39) are rotatably arranged beside the preheating mechanism (12), and the plurality of adhesive rollers (42) are rotatably arranged in an array at equal angles along the circumferential direction of the main roller (39). A set of rotation mechanisms (27) is respectively arranged at both ends of each main roller (39); The cleaning mechanism (19) further comprises a main motor (20), a bearing roller (21), an auxiliary motor (24), a main magnetic disk (25), two main gear rings (26), two center disks (22) and two positioning frames (23), each rotation mechanism (27) comprises an auxiliary magnetic disk (28) and a main gear (29), the two positioning frames (23) are respectively fixedly connected to the support seat of the preheating mechanism (12), the bearing roller (21) is rotatably arranged on a side close to the two positioning frames (23), the two center disks (22) are respectively fixedly connected to the two ends of the bearing roller (21), the two main gear rings (26) are respectively rotatably connected to the two center disks (22), the main motor (20) is connected to a positioning frame (23) ), the auxiliary motor (24) is fixedly connected to another positioning frame (23), the output end of the main motor (20) is coaxially fixedly connected to one end of the bearing roller (21), the output end of the auxiliary motor (24) is coaxially fixedly connected to the main magnetic disk (25), the auxiliary magnetic disk (28) is rotationally connected to the corresponding center disk (22), the auxiliary magnetic disk (28) is coaxially arranged with the main magnetic disk (25) and is connected to the main magnetic disk (25) through magnetic force, the main gear (29) is coaxially fixedly connected to the auxiliary magnetic disk (28) and meshes with the main gear ring (26), the two main gears (29) arranged at both ends of the bearing roller (21) and coaxially arranged are coaxially fixedly connected, and the main gear (29) is the input end of the rotation mechanism (27); The rotating mechanism (27) further comprises a clamping frame (37), a clamping contact (36), a material adhesive frame (8), two limit pins (34) and two clamping springs (35), one end of the clamping frame (37) is fixedly connected to the central disk (22), the clamping contact (36) is arranged at an end of the clamping frame (37) away from the central disk (22), one end of the two limit pins (34) is respectively fixedly connected to the clamping contact (36), and the other end is respectively slidably connected to the clamping frame (37), and the two clamping springs (35) are respectively sleeved on the two limit pins (34). Outside the pin (34), one end of the clamping spring (35) is fixedly connected to the clamping frame (37), and the other end is fixedly connected to the clamping contact (36). The two ends of the main roller (39) are respectively rotatably connected to the two clamping contacts (36). The adhesive frame (8) is rotatably connected to a side of the clamping contact (36) close to the adhesive roller (42). The adhesive frame (8) is fixedly connected to the end of the main roller (39). A plurality of adhesive rollers (42) are rotatably arranged in an array at equal angles along the circumferential direction of the adhesive frame (8). The adhesive frame (8) is the output end of the rotation mechanism (27).

2. A composite solid electrolyte membrane preparation device according to claim 1, characterized in that: The rotation mechanism (27) further comprises a main pulley (30), a belt (31), a secondary pulley (32) and a tensioner (33); the main pulley (30) is coaxially fixedly connected to the input end of the rotation mechanism (27); the secondary pulley (32) is coaxially fixedly connected to the output end of the rotation mechanism (27); the main pulley (30) and the secondary pulley (32) are connected by a belt (31); and the tensioner (33) is arranged on a side of the main pulley (30) close to the secondary pulley (32) and the output end thereof abuts against the belt (31).

3. A composite solid electrolyte membrane preparation device according to claim 1, characterized in that: The impurity removal mechanism (38) further comprises a plurality of pressing frames (41), each main roller (39) being fixedly connected to the plurality of pressing frames (41) at equal angles along the circumferential direction, one end of the pressing frame (41) being in contact with the sticking roller (42), the main roller (39) being formed with a plurality of grooves (40) in an array at equal angles along the circumferential direction, one end of the plurality of grooves (40) being respectively in contact with the lower ends of the plurality of pressing frames (41), and the grooves (40) being used to accommodate impurities scraped off the sticking roller (42) by the pressing frame (41).

4. A composite solid electrolyte membrane preparation device according to claim 1, characterized in that: The preheating mechanism (12) comprises a steam cleaner (14), a guide plate (15), a liquid collecting tank (16) and a drying machine (17). The steam cleaner (14) is fixedly arranged above the main coating mechanism (7) and its output end is arranged downward. The guide plate (15) is fixedly connected to the output end of the steam cleaner (14). The lower end of the guide plate (15) is arc-shaped. The liquid collecting tank (16) is arranged below the guide plate (15) and collects water droplets formed by high-temperature steam. The drying machine (17) is arranged on a side of the steam cleaner (14) close to the liquid collecting tank (16). The output end of the drying machine (17) is arranged in a horizontal state and dries the cleaned adhesive roller (42).

5. A composite solid electrolyte membrane preparation device according to claim 4, characterized in that: The preheating mechanism (12) further comprises an arc-shaped filter screen (18), which is arranged on a side of the liquid collecting tank (16) away from the drying machine (17) and has one end fixedly connected to the liquid collecting tank (16). The arc-shaped filter screen (18) abuts against the sticking roller (42) during the movement of the sticking roller (42), and the arc-shaped filter screen (18) intercepts some impurities entrained by the hot air.

6. A method for preparing a composite solid electrolyte membrane, comprising the apparatus for preparing a composite solid electrolyte membrane according to claim 1, characterized in that: The following preparation steps are also included: S1: The support film (4) is unwound by the main unwinding mechanism (2), and the silicone oil paper (5) is unwound synchronously by the auxiliary unwinding mechanism (3); then, when the silicone oil paper (5) passes through the main coating mechanism (7), the main coating mechanism (7) uses an extrusion coating method to evenly spray the composite electrolyte slurry onto the silicone oil paper (5); S2: Subsequently, the main roller (39) and the plurality of adhesive rollers (42) in the cleaning mechanism (19) work together to effectively clean the impurities on the support film (4). The cleaned support film (4) enters the preheating mechanism (12). Before the support film (4) is pressed onto the silicone oil paper (5), the preheating mechanism (12) heats the support film (4) to a predetermined first temperature range. S3: The pressing mechanism (6) presses the silicone oil paper (5) and the support film (4) which have undergone the above-mentioned treatment tightly together; the pressed materials enter the main oven (9) and are heated in the main oven (9) to a predetermined second temperature range, so that the composite electrolyte slurry is initially solidified; S4: the material coming out of the main oven (9) passes through the secondary coating mechanism (10), and the secondary coating mechanism (10) again coats the composite electrolyte slurry on the side of the support membrane (4) away from the silicone oil paper (5) by extrusion coating. Finally, the coated material enters the secondary oven (11), and is reheated in the secondary oven (11) to a predetermined third temperature range, so that the composite electrolyte slurry is completely cured; S5: After the solidification, the composite solid electrolyte membrane is rolled up by an external rolling mechanism to obtain a finished composite solid electrolyte membrane.

7. The method for preparing a composite solid electrolyte membrane according to claim 6, characterized in that: The first temperature range is 40°C-60°C, the second temperature range is 80°C-100°C, and the third temperature range is 120°C-150°C.

8. The method for preparing a composite solid electrolyte membrane according to claim 6, characterized in that: The extrusion coating controls the extrusion pressure of the composite electrolyte slurry to be between 0.5 MPa and 1.5 MPa, the coating thickness to be between 0.1 mm and 0.3 mm, and the wind speed of the hot air circulation in the main oven (9) and the auxiliary oven (11) to be controlled to be between 1 m / s and 3 m / s.

Images