Coating and drying device for lithium battery composite diaphragm

Abstract

The utility model provides a coating and drying device for a lithium battery composite diaphragm, and relates to the technical field of diaphragm production. The coating and drying device for the lithium battery composite diaphragm comprises a shell, a stepping motor is fixed to the middle of the shell, a first threaded rod is fixed to the driving end of the stepping motor, the outer surface of the first threaded rod is in threaded connection with a first sliding frame, and upper warm air blowers are arranged on the two sides of the first sliding frame correspondingly; a driving disc is fixed to the other end of the first threaded rod and connected with a driven disc through a synchronous belt, and a second threaded rod is fixed to the middle of the driven disc. According to the coating and drying device for the lithium battery composite diaphragm, a stepping motor drives a first threaded rod to rotate, the rapid drying effect is achieved, the effect of improving the working efficiency of the drying device is achieved, the stepping motor drives the first threaded rod to rotate, and the flexible slicking effect is achieved; the effect of improving the using effect of the drying device is achieved.

Description

Technical Field

[0001] The utility model relates to a coating and drying device for a lithium battery composite diaphragm, belonging to the technical field of diaphragm production. Background Art

[0002] In the structure of lithium batteries, the diaphragm is one of the key inner components. The performance of the diaphragm determines the interface structure and internal resistance of the battery, and directly affects the battery's capacity, cycle and safety performance. A diaphragm with excellent performance plays an important role in improving the overall performance of the battery. The main function of the diaphragm is to separate the positive and negative electrodes of the battery to prevent the two electrodes from contacting and short-circuiting. In addition, it also has the function of allowing electrolyte ions to pass through. The diaphragm material is non-conductive, and its physical and chemical properties have a great influence on the performance of the battery. Different types of batteries use different diaphragms. For lithium battery series, since the electrolyte is an organic solvent system, an organic solvent-resistant diaphragm material is required, generally a high-strength thin-film polyolefin porous membrane is used.

[0003] The comparative patent document publication number is: "CN206009162U, a coating machine drying device, comprising a box for a substrate to pass through, the coating machine drying device also comprises a plurality of air nozzles arranged above the substrate and with the blowing direction toward the substrate, and a plurality of guide rollers arranged at the bottom of the substrate for supporting and conveying the substrate, the air nozzles and guide rollers are arranged in sequence and spaced apart. The utility model provides a coating machine drying device with single-sided air supply, stable operation, good drying effect, simple structure and low operating cost."

[0004] The above patent still has the following problems in actual use: although the patent can perform daily drying operations on the diaphragm, in actual use, it is difficult for the air to form convection by relying solely on the single-sided air supply drying method, which makes the internal air circulation speed of the drying device slow, thereby making the drying speed of the drying device slow, and further making the working efficiency of the drying device low, and the transported diaphragm is transported smoothly, so that when the diaphragm coating device coats the diaphragm, due to the inability to adjust the coating amount, there is often excess coating liquid attached to the diaphragm. If it is simply scraped off by a scraper, it is easy to scrape off too much coating liquid due to the excessive tension formed between the diaphragm and the scraper, affecting the coating effect of the diaphragm, and thus making the use effect of the drying device not good enough. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] The purpose of the utility model is to provide a coating and drying device for a lithium battery composite diaphragm in order to solve the above problems, so as to solve the problems of low working efficiency and poor use effect of the drying device in the prior art.

[0007] (II) Technical solution

[0008] The utility model is implemented through the following technical scheme: a coating and drying device for a lithium battery composite diaphragm, comprising a shell, a stepper motor is fixed in the middle of the shell, a first threaded rod is fixed to the driving end of the stepper motor, the outer surface of the first threaded rod is threadedly connected to a first sliding frame, upper heaters are arranged on both sides of the first sliding frame, an active disk is fixed to the other end of the first threaded rod, the active disk is connected to the driven disk through a synchronous belt, a second threaded rod is fixed in the middle of the driven disk, the outer surface of the second threaded rod is threadedly connected to a second sliding frame, and lower heaters are arranged on both sides of the second sliding frame.

[0009] Preferably, a fixing frame is fixed to the other end of the second threaded rod, the other end of the fixing frame is rotatably connected to a connecting frame, the other end of the connecting frame is rotatably connected to a driving frame, and a sliding groove is provided in the middle of the shell.

[0010] Preferably, the outer surface of the driving frame is slidably connected to the inner wall of the slide groove, the middle portion of the driving frame is hollowed out, and the slide groove runs through one side of the shell.

[0011] Preferably, one end of the connecting frame is rotatably connected to one end of the driving frame, the other end of the connecting frame is rotatably connected to one end of the fixing frame, and the other end of the fixing frame is fixed to one end of the second threaded rod.

[0012] Preferably, the outer surface of the first threaded rod is rotatably connected to one side of the shell, the outer surface of the second threaded rod is rotatably connected to the other side of the shell, one end of the first threaded rod is fixed to the middle of the active disk, and one end of the second threaded rod is fixed to the middle of the driven disk.

[0013] Preferably, the outer surface of the first sliding frame is slidably connected to the inner wall on one side of the shell, and the outer surface of the second sliding frame is slidably connected to the inner wall on the other side of the shell, and the first sliding frame and the second sliding frame are arranged opposite to each other.

[0014] Preferably, two conveying rollers are provided at both ends of the shell, and legs are fixed at the four corners of the lower end of the shell. The four legs are arranged opposite to each other, and the vertical section of each leg is arranged in an inverted T shape.

[0015] The utility model provides a coating and drying device for a lithium battery composite diaphragm, which has the following beneficial effects:

[0016] 1. The coating and drying device for the lithium battery composite diaphragm drives the first threaded rod to rotate through a stepper motor, so that the first threaded rod, the second threaded rod, the first sliding frame, the second sliding frame, the active disk, the driven disk, the synchronous belt, the upper heater, and the lower heater work together to achieve a quick drying effect, effectively speeding up the drying speed of the diaphragm by the drying device, thereby achieving the effect of improving the working efficiency of the drying device.

[0017] 2. The coating and drying device for the lithium battery composite diaphragm drives the first threaded rod to rotate by a stepper motor, so that the first threaded rod, the second threaded rod, the active disk, the driven disk, the synchronous belt, the fixed frame, the connecting frame, the driving frame, and the slide groove cooperate with each other to achieve a flexible scraping effect. The scraping process can be adaptively performed based on the tension of the diaphragm to prevent affecting the coating effect of the diaphragm, thereby achieving the effect of improving the use effect of the drying device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the utility model;

[0019] Figure 2 It is a cross-sectional view of the shell of the utility model;

[0020] Figure 3 This is a schematic diagram of the first sliding frame structure of the utility model;

[0021] Figure 4 It is a schematic diagram of the driving frame structure of the utility model.

[0022]

Main component symbol description

[0023] 1. Housing; 2. Stepper motor; 3. First threaded rod; 4. First sliding frame; 5. Upper heater; 6. Active disk; 7. Synchronous belt; 8. Driven disk; 9. Second threaded rod; 10. Second sliding frame; 11. Lower heater; 12. Fixed frame; 13. Connecting frame; 14. Driving frame; 15. Slide; 16. Conveyor roller; 17. Support leg. DETAILED DESCRIPTION

[0024] The embodiment of the utility model provides a coating and drying device for a composite diaphragm of a lithium battery.

[0025] See also Figure 1 , Figure 2 , Figure 3 and Figure 4, including a shell 1, the shell 1 is the main body of the drying device, a stepper motor 2 is fixed in the middle of the shell 1, the stepper motor 2 is an electric motor that converts an electrical pulse signal into a corresponding angular displacement or linear displacement, each time a pulse signal is input, the rotor rotates an angle or moves forward, and its output angular displacement or linear displacement is proportional to the number of input pulses, and the rotation speed is proportional to the pulse frequency. A first threaded rod 3 is fixed to the driving end of the stepper motor 2, and the first threaded rod 3 can drive the first sliding frame 4 to slide. The first sliding frame 4 is threadedly connected to the outer surface of the first threaded rod 3. The first sliding frame 4 can drive two upper heaters 5 to perform mobile drying. Upper heaters 5 are provided on both sides of the first sliding frame 4. The upper heaters 5 can accelerate the rapid circulation of local air. An active disk 6 is fixed to the other end of the first threaded rod 3. The active disk 6 is connected to the driven disk 8 through a synchronous belt 7. A second threaded rod 9 is fixed to the middle of the driven disk 8. The second threaded rod 9 can drive the second sliding frame 10 to slide. The outer surface of the second threaded rod 9 A second sliding frame 10 is threadedly connected, and the second sliding frame 10 can drive two lower heaters 11 to perform mobile drying. The upper heater 5 and the lower heater 11 can effectively dry the upper and lower surfaces of the conveying diaphragm, and the first sliding frame 4 connected to the upper heater 5 has a built-in power supply, and the power supply is electrically connected to the upper heater 5, and the second sliding frame 10 connected to the lower heater 11 has a built-in power supply, and the power supply is electrically connected to the lower heater 11. Lower heaters 11 are arranged on both sides of the second sliding frame 10, and the lower heaters 11 perform the function of mobile drying. The outer surface of the first threaded rod 3 is rotatably connected to one side of the shell 1, and the outer surface of the second threaded rod 9 is rotatably connected to the other side of the shell 1. One end of the first threaded rod 3 is fixed to the middle of the active disk 6, and one end of the second threaded rod 9 is fixed to the middle of the driven disk 8. The outer surface of the first sliding frame 4 is slidably connected to the inner wall of one side of the shell 1, and the outer surface of the second sliding frame 10 is slidably connected to the inner wall of the other side of the shell 1. The first sliding frame 4 and the second sliding frame 10 are arranged opposite to each other.

[0026] Please refer again Figure 1 , Figure 2 , Figure 3 and Figure 4 It is worth specifically explaining that a fixing frame 12 is fixed to the other end of the second threaded rod 9, and a connecting frame 13 is rotatably connected to the other end of the fixing frame 12, and a driving frame 14 is rotatably connected to the other end of the connecting frame 13. The driving frame 14 can rely on the tension of the diaphragm to perform adaptive scraping processing to prevent affecting the coating effect of the diaphragm, thereby achieving the effect of improving the use effect of the drying device. A slide groove 15 is opened in the middle of the shell 1, and the outer surface of the driving frame 14 is slidably connected to the inner wall of the slide groove 15. The middle of the driving frame 14 is hollowed out, and the slide groove 15 runs through one side of the shell 1. One end of the connecting frame 13 is rotatably connected to one end of the driving frame 14, and the other end of the connecting frame 13 is rotatably connected to one end of the fixing frame 12, and the other end of the fixing frame 12 is fixed to one end of the second threaded rod 9.

[0027] When the utility model is in use: first, the stepping motor 2 drives the first threaded rod 3 to rotate, so that the first sliding frame 4 threadedly connected to the outer surface of the first threaded rod 3 slides under the limit stability of the shell 1, and at the same time, the active disk 6 fixedly connected to the first threaded rod 3 drives the driven disk 8 to rotate synchronously through the synchronous belt 7, so that the second threaded rod 9 fixedly connected to the driven disk 8 rotates synchronously under the stability of the shell 1, and then the second sliding frame 10 threadedly connected to the outer surface of the second threaded rod 9 slides synchronously under the limit stability of the shell 1, and the synchronously sliding first sliding frame 4 and the second sliding frame 10 drive the two upper heaters 5 and the two lower heaters 11 to move synchronously for blowing treatment, so that the diaphragm transported by the conveying roller 16 can be quickly dried by strong convection warm blowing, thereby achieving the effect of rapid drying, effectively accelerating the drying speed of the diaphragm by the drying device, and thus achieving the effect of improving the working efficiency of the drying device. The machine 5 and the lower heater 11 can effectively dry the upper and lower surfaces of the conveying diaphragm, and the first sliding frame 4 connected to the upper heater 5 has a built-in power supply, and the power supply is electrically connected to the upper heater 5, and the second sliding frame 10 connected to the lower heater 11 has a built-in power supply, and the power supply is electrically connected to the lower heater 11. At the same time, the first threaded rod 3 is driven by the stepping motor 2 to rotate, so that the first threaded rod 3 drives the driven disk 8 to rotate through the active disk 6 via the synchronous belt 7, so that the second threaded rod 9 fixedly connected to the driven disk 8 drives the fixed frame 12 to rotate, and then the connecting frame 13 rotatably connected to the fixed frame 12 can stably drive the frame 14 to slide back and forth on the inner wall of the slide groove 15, and can flexibly scrape and flatten the diaphragm conveyed by the conveying roller 16 to achieve the effect of flexible scraping and flattening, and can rely on the tension of the diaphragm to perform adaptive scraping and flattening to prevent affecting the coating effect of the diaphragm, thereby achieving the effect of improving the use effect of the drying device.

[0028] Working principle: The first threaded rod 3 is driven to rotate by the stepper motor 2, so that the first threaded rod 3 drives the first sliding frame 4 to slide, thereby achieving a quick drying effect, effectively accelerating the drying speed of the drying device for the diaphragm, thereby achieving the effect of improving the working efficiency of the drying device. At the same time, the first threaded rod 3 is driven to rotate by the stepper motor 2, so that the active disk 6 connected to the first threaded rod 3 stably drives the frame 14 to slide back and forth, thereby achieving a flexible scraping effect. The tension of the diaphragm can be relied on for adaptive scraping processing to prevent affecting the coating effect of the diaphragm, thereby achieving the effect of improving the use effect of the drying device.

[0029] Please refer again Figure 1It is worth mentioning that two conveying rollers 16 are provided at both ends of the shell 1, and legs 17 are fixed at the four corners of the lower end of the shell 1. The four legs 17 are arranged opposite to each other, and the vertical section of each leg 17 is an inverted T-shaped arrangement. The shell 1 can be supported by the arranged legs 17, thereby effectively improving the stability of the drying device. The diaphragm can be conveyed by the arranged conveying rollers 16, thereby achieving the effect of improving the practicality of the drying device.

[0030] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A coating and drying device for a lithium battery composite diaphragm, comprising a housing (1), characterized in that: A stepper motor (2) is fixed in the middle of the shell (1), a first threaded rod (3) is fixed to the driving end of the stepper motor (2), the outer surface of the first threaded rod (3) is threadedly connected to a first sliding frame (4), upper heaters (5) are arranged on both sides of the first sliding frame (4), a driving disk (6) is fixed to the other end of the first threaded rod (3), the driving disk (6) is connected to a driven disk (8) through a synchronous belt (7), a second threaded rod (9) is fixed in the middle of the driven disk (8), the outer surface of the second threaded rod (9) is threadedly connected to a second sliding frame (10), and lower heaters (11) are arranged on both sides of the second sliding frame (10).

2. The coating and drying device for a lithium battery composite diaphragm according to claim 1, characterized in that: The other end of the second threaded rod (9) is fixed with a fixing frame (12), the other end of the fixing frame (12) is rotatably connected to a connecting frame (13), the other end of the connecting frame (13) is rotatably connected to a driving frame (14), and a sliding groove (15) is provided in the middle of the shell (1).

3. A coating and drying device for a lithium battery composite diaphragm according to claim 2, characterized in that: The outer surface of the driving frame (14) is slidably connected to the inner wall of the sliding groove (15), the middle part of the driving frame (14) is hollowed out, and the sliding groove (15) passes through one side of the shell (1).

4. The coating and drying device for a lithium battery composite diaphragm according to claim 2, characterized in that: One end of the connecting frame (13) is rotatably connected to one end of the driving frame (14), and the other end of the connecting frame (13) is rotatably connected to one end of the fixing frame (12), and the other end of the fixing frame (12) is fixed to one end of the second threaded rod (9).

5. The coating and drying device for a lithium battery composite diaphragm according to claim 1, characterized in that: The outer surface of the first threaded rod (3) is rotatably connected to one side of the housing (1), and the outer surface of the second threaded rod (9) is rotatably connected to the other side of the housing (1); one end of the first threaded rod (3) is fixed to the middle of the active disk (6), and one end of the second threaded rod (9) is fixed to the middle of the driven disk (8).

6. The coating and drying device for a lithium battery composite diaphragm according to claim 1, characterized in that: The outer surface of the first sliding frame (4) is slidably connected to the inner wall of one side of the shell (1), and the outer surface of the second sliding frame (10) is slidably connected to the inner wall of the other side of the shell (1), and the first sliding frame (4) and the second sliding frame (10) are arranged opposite to each other.

7. The coating and drying device for a lithium battery composite diaphragm according to claim 1, characterized in that: Two conveying rollers (16) are arranged at both ends of the shell (1), and legs (17) are fixed at the four corners of the lower end of the shell (1). The four legs (17) are arranged opposite to each other, and the vertical section of each leg (17) is arranged in an inverted T shape.

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