Equipment device for preparing hydroxypropyl methyl cellulose coating diaphragm

Through the design of automatic coating device, using pressure pumps, nozzles and image collectors and other technologies, the automated production of hydroxypropyl methylcellulose-coated diaphragm is realized, solving the problem of lack of automatic production equipment in the market and improving production efficiency and safety, ensuring uniformity of coating and reducing waste.

CN222355362UActive Publication Date: 2025-01-14SOUTHWEST PETROLEUM UNIV
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Patent Information

Application Number
CN202420400479.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-02
Publication Date
2025-01-14
Estimated Expiration
2034-03-02

AI Technical Summary

Technical Problem

The market lacks equipment and devices to automatically produce hydroxypropyl methylcellulose-coated separators, which limits its large-scale application on the market, and the problems of spontaneous ignition and explosion of liquid electrolytes have not been effectively solved.

Method used

An automatic coating device was designed, and the combination of pressure pump, spray head, image collector, electric telescopic rod, conveyor belt and roller is realized to realize the automatic, uniform and precise coating of hydroxypropyl methyl cellulose liquid. Reduce waste and ensure uniformity and smoothness of the coating through scraper casting.

Benefits of technology

The automated production of hydroxypropyl methylcellulose-coated separator is realized, ensuring uniform and intermittent injection of the material liquid and uniform smoothness of the coating, reducing production waste, and improving safety and production efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses equipment for preparing a hydroxypropyl methyl cellulose coating diaphragm, and belongs to the technical field of preparation of lithium battery diaphragm coatings. A supporting structure is arranged on the upper surface of a supporting plate, the supporting structure is connected with a guiding device through a fixing structure, a lifting table is connected to the guiding device, a scraper is connected to the bottom of the lifting table, a supporting ring is arranged at the upper end of an electric telescopic rod, and a second motor is arranged on the outer side of the supporting ring; a connecting device is arranged on the inner side of the supporting device, a support is arranged on the upper surface of the supporting device, an image collector is arranged on the lower surface of the support, the supporting plate is provided with a liquid storage tank through a second supporting frame, the liquid storage tank is provided with a pressure pump, the pressure pump is connected with a guide pipe, and the guide pipe is connected with a spray head. By adopting the device disclosed by the utility model, the thickness of the coating can be effectively controlled, and the production efficiency of the hydroxypropyl methyl cellulose diaphragm is greatly improved.
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Description

Technical Field

[0001] The utility model belongs to the technical field of membrane coating, and relates to an automatic membrane coating device, in particular to an automatic membrane coating device for preparing a hydroxypropyl methylcellulose coating membrane. Background Art

[0002] Since the development of lithium-ion batteries, the charging and discharging performance has been well developed, which greatly meets the standby requirements of general digital products and power tools. In the past one or two years, the performance has also been improved to meet the long-range requirements of power vehicles. However, today's commercial lithium-ion battery products usually use liquid electrolytes, which are prone to spontaneous combustion and explosion, causing great losses to people's lives and property. Lithium-ion batteries with built-in quasi-solid electrolytes based on hydroxypropyl methylcellulose can greatly improve the safety of batteries. However, there is no equipment or device on the market that can automatically produce hydroxypropyl methylcellulose coated diaphragms, which limits its large-scale application in today's market. Therefore, there is an urgent need for an equipment or device that can automatically produce hydroxypropyl methylcellulose coated diaphragms to meet the needs of high-efficiency production. Utility Model Content

[0003] 1. Technical issues to be solved

[0004] In view of the gap in the prior art, the utility model provides an automatic coating device for preparing hydroxypropyl methylcellulose coated diaphragms. The device and operation of the utility model are simple. The design technology of the roller can make the coating more fully utilized and reduce waste, while ensuring the uniformity of coating, thereby solving the problems mentioned in the background technology.

[0005] (II) Technical solution

[0006] The utility model provides a device for preparing a hydroxypropyl methylcellulose coated diaphragm. Through the arrangement of a pressure pump, a nozzle, and an image collector, the device for preparing the hydroxypropyl methylcellulose coated diaphragm has the effect of improving automation capability. Through the coordinated arrangement of the image collector, the electric telescopic rod, the pressure pump, the faucet, the first motor, the conveyor belt, and the second motor, during use, the capacity and position of the hydroxypropyl methylcellulose liquid in the liquid tank can be detected by the image collector, thereby controlling the shutoff of the pressure pump and the faucet. The first motor drives the conveyor belt to rotate, and the second motor drives the roller to roll. The conveyor belt is cooperated to evenly and intermittently apply the liquid to the surface of the diaphragm, and the amount of hydroxypropyl methylcellulose liquid used for each application can be accurately controlled to ensure that no waste is generated. The lifting platform is controlled by the limit component and

[0007] The guide device is set up to move the 50-micron high scraper to the diaphragm position, and the coating is scraped using the scraper casting method to obtain a uniform and smooth wet coating film. Through the design of the pressure pump and the nozzle, pressure can be provided for the filling of the liquid to control the filling amount, so that the injection of the material tank can be fully automated, achieving the purpose of automated production capacity.

[0008] The utility model provides a device for preparing a hydroxypropyl methylcellulose coated diaphragm. The device has the effect of facilitating the control of the amount of injected liquid through the arrangement of a second motor, a drum wall, a drum inner core, a drum rod and a connecting device. The second motor, the drum rod and the drum inner core are arranged in coordination. During use, the second motor drives the drum rod to rotate, and the drum rod is connected to the drum inner core, thereby driving the rotation of the drum inner core to ensure that the liquid is evenly and intermittently injected into the liquid tank of the drum inner core. The outer wall of the drum and the connecting device are arranged so that the connecting device is connected to the outer wall of the drum. The wall is connected to each other, thereby fixing the outer wall of the drum so that it does not rotate. When the liquid groove of the inner core of the drum coincides with the liquid outlet on the upper side of the outer wall of the drum, liquid begins to be injected from the liquid storage tank into the liquid groove. When the liquid groove of the inner core of the drum does not coincide with the liquid outlet on the upper side of the outer wall of the drum, the injection is automatically terminated. When the liquid groove of the inner core of the drum coincides with the liquid outlet on the lower side of the outer wall of the drum, the liquid begins to flow from the liquid groove to the diaphragm on the conveyor belt. When the liquid groove of the inner core of the drum does not coincide with the liquid outlet on the lower side of the outer wall of the drum, the outflow of the liquid is automatically terminated, thereby achieving the purpose of facilitating the control of intermittent and uniform injection of the liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the structure of a preparation device for preparing a hydroxypropyl methylcellulose coated diaphragm of the utility model;

[0010] Figure 2 It is a schematic diagram of the structure of the outer wall and inner core of the drum;

[0011] Figure 3 It is a schematic diagram of the structure of the local components of the coating device;

[0012] Figure 4 is a schematic structural diagram of a coating device;

[0013] Figure 5 It is a structural schematic diagram of the scraper moving component;

[0014] Figure 6 It is a schematic diagram of the structure of the coating device from a top view.

[0015] In the figure: 1-first support frame; 2-diaphragm; 3-transmission device; 4-support plate; 5-electric telescopic rod; 6-first motor; 7-support structure; 8-limiting assembly; 9-fixed structure; 10-guide device; 11-fixed assembly; 12-lifting platform; 13-support rod; 14-shock absorbing device; 15-50 micron height scraper; 16-support device; 17-fixed device; 18-roller cover; 19-roller outer wall; 20 liquid inlet; 21-liquid outlet; 22-roller inner core; 23-liquid tank; 24-roller rod; 25-second motor; 26-bracket; 27-image collector; 28-second support frame; 29-liquid storage tank; 30-pressure pump; 31-catheter; 32-sprinkler. DETAILED DESCRIPTION

[0016] The principles and features of the present invention will be described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0017] Example 1

[0018] See also Figure 1 , Figure 5 The utility model provides a technical solution: an equipment device for preparing a hydroxypropyl methylcellulose coated diaphragm, comprising a first support frame 1, a commercial diaphragm Celgard2700 is arranged on the upper surface of the first support frame 1, a conveying device 3 is arranged on the upper surface of the first support frame 1, the conveying device 3 is connected to the output end of the first motor 6, support plates 4 are arranged on both sides of the conveying device 3, a support structure 7 is arranged on the support plate 4, the support structure 7 provides support and stability, the support structure 7 is connected to the fixed structure 9, the guide device 10 is connected to the fixed structure 9, and limited position components are arranged on both sides of the guide device 10 8. The guide device 10 includes a guide rail, which is cylindrical and installed on a fixing device. The limit assembly 8 is used to limit the movement range of the slider on the guide device 10. It includes a group of limit grooves symmetrically opened on both sides of the guide device. Each limit groove is provided with a slideway. The lifting platform 12 can perform linear motion in the limit groove by cooperating with the slideway. The lifting platform 12 is connected to the guide device 10, and fixing assemblies 11 are arranged on both sides. The fixing assemblies 11 are composed of fixing blocks. The bottom of the lifting platform 12 is connected to a 50-micron height scraper 15 through a support rod, and a shock absorbing device 14 is arranged on the support rod 13.

[0019] When in use, the diaphragm Celgard2700 is conveyed along with the conveying device 3. The drive of the first motor 6 ensures the stability of the conveying speed. Support structures 7 are provided on both sides of the support plate 4. The support structure 7 provides support and stability. The fixed structure 9 fixes the guide device 10 on the support structure 7 to ensure its stability. The lifting platform 12 slides up and down through the cylindrical guide rail to ensure that no deviation occurs. There are two limit grooves on both sides of the guide device 10. The limit grooves and the fixed assembly 11 are used to limit the sliding range of the slider and ensure the stability of the slider. The slider moves on the circular guide rail to drive the 50-micron height scraper to move up and down. When scraping, the 50-micron height scraper moves to the contact position with the diaphragm, and the fixed assembly 11 keeps it fixed. At the same time, the shock absorbing device 14 slows down the vibration of the 50-micron height scraper 15 to ensure the stability of the scraping process and ensure that the thickness of the coating is highly uniform.

[0020] Example 2

[0021] See also Figures 1 to 4 The utility model provides a technical solution: a device for preparing a hydroxypropyl methylcellulose coated diaphragm comprises two electric telescopic rods 5 perpendicular to a support plate, a support device 16 is arranged on the upper surface of the electric telescopic rod 5, the support device 16 comprises a support ring and a support cover, the support cover is connected to a fixing device 17, the fixing device 17 is connected to a drum outer wall 19, a liquid outlet 20 is arranged at the upper end of the drum outer wall 19, a liquid outlet 21 is arranged at the lower end of the drum outer wall 19, a drum cover 18 is arranged at both ends, and a drum inner core 22 is arranged in the drum. The inner core 22 of the drum is provided with five liquid tanks 23 of uniform size and evenly spaced intervals. The inner core 22 of the drum is connected to a drum rod 24. One end of the drum rod 24 is connected to the output end of a second motor 25. A bracket 26 is provided on the upper surface of the support ring. An image collector 27 is provided on the lower surface of the bracket 26. A liquid storage tank 29 is provided on the upper surface of the support plate 4 through a second support frame 28. A pressure pump 30 is provided on the outer surface of the liquid storage tank 29. The output end of the pressure pump 30 is connected to a conduit 31. The other end of the conduit 31 is connected to a nozzle 32.

[0022] When in use, the second motor 25, the drum wall 19, the drum core 22, the drum rod 24 and the fixing device 17 are arranged so that the device has the effect of facilitating the control of the amount of injected liquid. The second motor 25, the drum rod 24 and the drum core 22 are arranged in coordination. During use, the second motor 25 drives the drum rod 24 to rotate, and the drum rod 24 is connected to the drum core 22, thereby driving the rotation of the drum core 22 to ensure that the liquid is evenly and intermittently injected into the liquid tank 23 of the drum core 22. The fixing device 17 is connected to the drum outer wall 19 by the arrangement of the drum outer wall 19 and the fixing device 17, thereby fixing the drum. The outer wall 19 prevents it from rotating. When the liquid groove 23 of the inner core 22 of the drum coincides with the liquid outlet 20 of the outer wall 19 of the drum, liquid begins to be injected from the liquid storage tank 29 into the liquid groove 23. When the liquid groove 23 of the inner core 22 of the drum coincides with the liquid outlet 20 of the outer wall 19 of the drum, the injection is automatically terminated. When the liquid groove 23 of the inner core 22 of the drum coincides with the liquid outlet 21 of the outer wall 19 of the drum, the liquid begins to flow from the liquid groove 23 to the diaphragm 2 on the conveyor belt. When the liquid groove 23 of the inner core 22 of the drum coincides with the liquid outlet 21 of the outer wall 19 of the drum, the liquid automatically terminates the outflow of the liquid, thereby achieving the purpose of facilitating the control of intermittent and uniform injection of the liquid.

[0023] Example 3

[0024] See also Figures 1 to 6 The utility model provides a technical solution: a device for preparing a hydroxypropyl methylcellulose coated diaphragm includes a support plate 4, a liquid storage tank 29 is arranged on the upper surface of the support plate 4 through a second support frame 28, a pressure pump 30 is arranged on the outer surface of the liquid storage tank 29, the output end of the pressure pump 30 is connected to a conduit 31, and the other end of the conduit 31 is connected to a nozzle 32.

[0025] During use, the pressure pump 30, the nozzle 32, and the image collector 27 are arranged so that the equipment device for preparing the hydroxypropyl methylcellulose coated diaphragm has the effect of improving the automation capability. Through the coordinated arrangement of the image collector 27, the electric telescopic rod 5, the pressure pump 30, the nozzle 32, the first motor 6, the conveyor belt, and the second motor 25, the image collector 27 can be used to detect the capacity and position of the hydroxypropyl methylcellulose liquid in the liquid tank 23 during use, thereby controlling the shutoff of the pressure pump 30 and the nozzle 32, while the first motor 6 drives the conveyor belt to rotate, and the second motor 25 drives the roller 25 to rotate. The barrel rod 24 rolls and cooperates with the conveyor belt to evenly and intermittently apply the liquid to the surface of the diaphragm 2, and can accurately control the amount of hydroxypropyl methylcellulose liquid used for each application to ensure that no waste is generated. The lifting platform 12 moves the 50-micron height scraper 15 to the position of the diaphragm 1 through the setting of the limit component 8 and the guide device 10, and adopts the scraper casting method to scrape the coating to obtain a uniform and smooth wet coating film. Through the design of the pressure pump 30 and the nozzle 32, pressure can be provided for the filling of the liquid during use to control the filling amount, so that the injection of the material tank can be fully automated, achieving the purpose of automated production capacity.

[0026] Example 4

[0027] See also Figures 1 to 6 The utility model provides a technical solution: an equipment device for preparing a hydroxypropyl methylcellulose coated diaphragm, and its specific implementation scheme is that it includes the following steps:

[0028] (1) Weigh a certain amount of hydroxypropyl methylcellulose powder and a certain amount of deionized water, place them in a beaker, maintain the temperature at 65±2° C. and stir them magnetically for 9-10 hours to obtain a uniform suspension slurry with a mass concentration of 1.0 wt.%;

[0029] (2) pouring the hydroxypropyl methylcellulose liquid into a storage tank (29), and transporting the liquid to the liquid tank via a pressure pump (30) and a feed pipe (31);

[0030] (3) lowering the lifting platform (12) and moving the scraper (15) to a position just in contact with the diaphragm (2);

[0031] (4) Turn on the power supply, so that the first motor (6) drives the conveying device (3) to operate, and the second motor (25) drives the roller rod (24) to rotate;

[0032] (5) Turn off the power supply to obtain a uniform and smooth wet coating film, place the wet film at room temperature to dry for 2 days, and then transfer it to a vacuum oven to dry at 60°C for 24 hours to obtain a dry film with uniform coating thickness and smooth coating surface. The coated composite film is used as a hydroxypropyl methylcellulose coated diaphragm

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for preparing a hydroxypropyl methylcellulose coated diaphragm, characterized in that: Specifically, it comprises a first support frame (1), a conveying device (3) is arranged on the upper side of the first support frame (1), the output end of the first motor (6) is connected to the conveying device (3), a support plate (4) is arranged on the upper surface of the first support frame (1), a support structure (7) is arranged on the support plate (4), the support structure (7) is connected to a fixed structure (9), a guide device (10) is arranged on the fixed structure (9), limiting components (8) are arranged on both sides of the guide device, a lifting platform (12) is connected to the guide device, a fixing component (11) is installed at the bottom of the lifting platform (12), the fixing component (11) is connected to the limiting component (8), the bottom of the lifting platform (12) is connected to a 50 micron height scraper (15) through a supporting rod (13), a shock absorbing device (14) is arranged on the support rod (13), and the upper surface of the support plate (4) is provided with a support structure (7). The surface is provided with an electric telescopic rod (5), the upper end of the telescopic rod of the electric telescopic rod (5) is provided with a supporting device (16), the outer side of the supporting device (16) is provided with a second motor (25), the inner side is provided with a fixing device (17), the fixing device (17) is connected to the outer wall of the drum (19), the output end of the second motor (25) is provided with a drum rod (24), the drum rod (24) is connected to the inner core (22) of the drum, the upper surface of the supporting device (16) is provided with a bracket (26), the lower surface of the bracket (26) is provided with an image collector (27), the upper surface of the first supporting frame (1) is provided with a liquid storage tank (29) through the second supporting frame (28), a pressure pump (30) is provided on one side of the liquid storage tank (29), the pressure pump (30) is connected to a conduit (31), and the conduit (31) is connected to a nozzle (32).

2. The device for preparing a hydroxypropyl methylcellulose coated diaphragm according to claim 1, characterized in that: A first motor (6) is provided on the outer surface of the conveying device (3), and the conveying device (3) is connected to the output end of the first motor (6).

3. The device for preparing a hydroxypropyl methylcellulose coated diaphragm according to claim 1, characterized in that: Two electric telescopic rods (5) are provided and are respectively arranged on the left and right sides of the upper surface of the support plate (4).

4. The device for preparing a hydroxypropyl methylcellulose coated diaphragm according to claim 1, characterized in that: The roller inner core (22) is evenly provided with five liquid feed grooves (23), and the roller inner core (22) is connected to a roller rod (24).

5. The device for preparing a hydroxypropyl methylcellulose coated diaphragm according to claim 1, characterized in that: The outer wall (19) of the drum is provided with a liquid passage opening (20) on the upper side thereof for passing liquid, and a plurality of liquid passage holes (21) on the lower side thereof for passing liquid.

6. The device for preparing a hydroxypropyl methylcellulose coated diaphragm according to claim 1, characterized in that: The outer wall of the drum (19) is connected to the fixing device (17) and remains fixed, while the inner core of the drum is connected to the inner core of the drum (22), the drum rod (24) is connected to the output end of the second motor (25), and the inner core of the drum (22) rotates along with the drum rod (24).

7. The device for preparing a hydroxypropyl methylcellulose coated diaphragm according to claim 1, characterized in that: The following steps are involved: (1) Weigh a certain amount of hydroxypropyl methylcellulose powder and a certain amount of deionized water, place them in a beaker, maintain the temperature at 65±2° C. and stir them magnetically for 9-10 hours to obtain a uniform suspension slurry with a mass concentration of 1.0 wt.%; (2) pouring the hydroxypropyl methylcellulose liquid into a liquid storage tank (29), and transporting the liquid to a liquid tank (23) via a pressure pump (30) and a conduit (31); (3) lowering the lifting platform (12) and moving the scraper (15) to a position just in contact with the diaphragm (2); (4) Turn on the power supply, so that the first motor (6) drives the conveying device (3) to operate, and the second motor (25) drives the roller rod (24) to rotate; (5) Turn off the power supply to obtain a uniform and smooth wet coating film, place the wet film at room temperature to dry for 2 days, and then transfer it to a vacuum oven to dry at 60°C for 24 hours to obtain a dry film with uniform coating thickness and smooth coating surface.

8. The device for preparing a hydroxypropyl methylcellulose coated diaphragm according to claim 7, characterized in that The dry film is used as a hydroxypropyl methylcellulose coating membrane.