Lithium-ion battery diaphragm coating device with drying function and use method

Abstract

The present invention relates to the technical field of diaphragm spraying, and discloses a diaphragm coating device for lithium-ion batteries with a drying function and a method for using the device. The device comprises a main body structure, a retaining structure and a drying structure; the retaining structure is movably arranged on the main body structure, and the drying structure is fixedly arranged on the main body structure and movably inserted into the retaining structure. The retaining structure can realize the fixation of diaphragms of different lengths, and the wall surface can be rotated during the spraying process and the drying process, so as to realize double-sided spraying, heating and cooling, and promote rapid drying of the sprayed object; the drying structure cooperates with the main body structure and the retaining structure to promote the reverse heating and reverse wall heat dissipation after spraying, realize deep penetration of the heated heat energy into the sprayed object, and form a temperature difference after uniform heating to promote volatilization and drying; single blowing drying or rotating drying can also be realized with the help of the rotation of the main structure, and the overall footprint is small.

Description

Technical Field

[0001] The present invention relates to the technical field of diaphragm spraying, in particular to a diaphragm coating device for lithium ion batteries with a drying function and a use method thereof. Background Art

[0002] In the structure of lithium batteries, the diaphragm is one of the key internal components; the main function of the diaphragm is to separate the positive and negative poles of the battery to prevent the two poles 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; before the diaphragm is used to form a battery, the diaphragm needs to be sprayed with a medium, and the medium liquid sprayed on different batteries is not the same; and most existing spraying equipment is only a single spraying, and then dried with the help of other equipment, forming a long production line that occupies more space. Therefore, a diaphragm coating device for lithium-ion batteries with a drying function and a method of use are designed. Summary of the Invention

[0003] The purpose of the present invention is to provide a lithium-ion battery diaphragm coating device with a drying function and a method of use, so as to solve the problems of spraying different sizes and rapid and uniform drying.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a diaphragm coating device for lithium-ion batteries with a drying function, comprising a main structure, a retaining structure and a drying structure; the retaining structure is movably arranged on the main structure, and the drying structure is fixedly arranged on the main structure and movably inserted into the retaining structure.

[0005] The main structure includes a base, a first mounting bracket, a second mounting bracket, a motor, a first pulley, a transmission belt, a liquid pump and a spraying assembly; the base is a rectangular structure, the first mounting bracket is a concave structure, the first mounting bracket is fixedly arranged on the upper wall of the left end of the base and is located on the center line, a first bearing is provided in the right end of the first mounting bracket, the second mounting bracket is a T-shaped structure, and it has three ends, one end of the second mounting bracket is fixedly arranged on the upper wall of the right end of the base and is located in the middle, a first slide groove is provided in the middle of the left end of the second mounting bracket, the motor is fixedly arranged on the upper wall of the right end of the base and is located between the first mounting bracket and the second mounting bracket, the first pulley is fixedly sleeved on the motor driving end, one end of the transmission belt is movably sleeved on the first pulley, the liquid pump is fixedly arranged on the upper wall of the left end of the second mounting bracket, the spraying assembly is fixedly arranged on the second mounting bracket and is connected to the liquid outlet end of the liquid pump through a pipeline.

[0006] Preferably, the spraying assembly includes an electric push rod, a slide, a solenoid valve and a pair of nozzles; the electric push rod is fixedly arranged on the upper wall of the right end of the second mounting frame, one end of the slide is movably embedded in the first slide groove of the second mounting frame, and the other end is located on the rear side of the second mounting frame, one end of the slide is fixedly connected to the telescopic end of the electric push rod, and the other end of the slide is located below the left end of the second mounting frame, the solenoid valve is fixedly arranged on the rear side wall of the other end of the slide, one of the nozzles is fixedly arranged under one end of the slide, and the other nozzle is fixedly arranged on the other end of the slide and is connected to one end of the solenoid valve, the spraying directions of the pair of nozzles are relatively vertical, and the other end of the solenoid valve and one of the nozzles are respectively connected to the liquid outlet end of the liquid pump through a pipe.

[0007] Preferably, the retaining structure includes a flip frame, a second pulley, a sun gear and two pairs of retaining components; the flip frame is a cylindrical structure, and two pairs of switching grooves are equidistantly provided on the side wall at one end, and a second bearing is provided in the middle of the inner wall of one end of the switching groove, and a first shaft rod is provided in the middle of the other end of the flip frame, and the flip frame is fixed to the first bearing at the right end of the first mounting frame through the first shaft rod, and the second pulley is fixedly mounted on the other end of the first shaft rod and fits with the other end of the transmission belt, and the sun gear is fixedly set on the left wall at the right end of the first mounting frame and movably mounted on the first shaft rod, and the two pairs of retaining components are movably set in the switching groove of the flip frame.

[0008] Preferably, the retaining assembly includes a spray frame, a second shaft, a planetary gear, an adjustment frame, a pair of adjustment bolts and two pairs of clamping units; the spray frame is a rectangular frame structure, the spray frame is movably embedded in one of the rotation slots, and the front side wall of the left end of the spray frame is provided with a first torsion slot near the upper and lower ends, the upper and lower side walls inside the spray frame are provided with a second slide slot near the front end, one end of the second shaft is fixedly connected to the middle of the right side wall of the spray frame, and the other end is fixed and passes through the second bearing, the planetary gear is fixedly sleeved on the other end of the second shaft On one end, and meshed with the sun gear, both ends of the adjustment frame are concave structures, and each has two ends, the two ends of the adjustment frame are movably embedded in the second slide groove, and the other two ends are located on the front side of the spray frame, and the front side walls of the other two ends of the adjustment frame are provided with a second torsion groove that is the same as the first torsion groove. A pair of adjusting bolts are movably screwed into the two ends of the adjustment frame, and are respectively fitted on the inner side wall of the spray frame. The two pairs of clamping units are movably set at the first torsion groove and the second torsion groove, and are symmetrical to each other.

[0009] Preferably, the clamping unit consists of a clamping jaw and a torsion spring; the clamping jaw is a V-shaped structure, and a force-applying groove is provided in the middle part; the middle part of the clamping jaw is movably provided in the middle part of the first torsion groove through a pin shaft, and the pin shaft movably passes through the force-applying groove; the clamping jaw can be folded to a certain angle with the help of the pin shaft, the torsion spring movably sleeved on the pin shaft, and is located in the force-applying groove, one end of the torsion spring is fixedly connected to one end of the clamping jaw, and the other end of the torsion spring is fixedly connected to the inner wall of the first torsion groove.

[0010] Preferably, the drying structure includes a drying rack, a fixed rod, a plurality of first fans, a plurality of second fans and a plurality of electric heating rods; the drying rack is an octagonal structure, and the upper and lower side walls and the front and rear side walls are all horizontal wall surfaces, and the other four side walls of the drying rack are all inclined wall surfaces, the upper and lower side walls of the drying rack are each provided with a first air duct in the middle, and the left and right side walls are each provided with a first air inlet connected to the first air duct, the front and rear side walls of the drying rack are each provided with a second air duct in the middle, and the left and right side walls of the drying rack are each provided with a second air inlet connected to the second air duct, a third slide groove is provided in the second air duct near the front end and the upper and lower side walls, and the second air duct is provided near the upper and lower sides of the left end The sides are provided with a feeding port connected to the third slide, one end of the drying rack is fixedly set on the left end of the first mounting bracket, and the other end is movably inserted in the flip rack, one end of the fixing rod is fixedly welded to the middle of the side wall of one end of the drying rack, and the other end is fixed and passes through the left end of the first mounting bracket, and sliders are provided on the upper and lower side walls of several first fans, and several first fans are movably inserted into the third slide through the sliders to be embedded in the second air duct, and several second fans are equidistantly arranged on the front and rear side walls of the first air duct, and are located above the first air inlet, and the two ends of several electric heating rods are fixedly set on the left and right side walls of the first air duct, and are located above the second fans.

[0011] Preferably, the retaining components on the upper and lower sides of the turning frame are oriented in opposite directions to the retaining components on the left and right sides, that is, the clamping units are alternately arranged on the outside and inside of the turning frame.

[0012] Preferably, the spray heads correspond to the spray racks above and behind the flip rack respectively.

[0013] A method for using a diaphragm coating device for lithium-ion batteries with a drying function comprises the following steps: step (1), the cut diaphragm can be fixed on a spray frame with the help of a clamping unit through a retaining structure; step (2), then the turning frame is driven by a driving motor to rotate so that the diaphragm and the spray assembly are opposite to each other, thereby achieving spraying; step (3), after spraying, as the turning frame rotates, the spray wall surface will rotate 180 degrees to correspond to the electric heating rod in the drying structure for heating, and then rotate 180 degrees again to correspond to the first fan for heat dissipation, thereby achieving temperature difference to promote drying and dehumidification; step (4), it can also be used for drying by means of the first fan through a single drive or by quickly rotating the turning frame.

[0014] The present invention provides a lithium-ion battery diaphragm coating device with a drying function and a method of use, which have the following beneficial effects:

[0015] 1. The present invention can fix diaphragms of different lengths through the retaining structure, and can rotate the wall surface during the spraying and drying processes, so as to achieve double-sided spraying, heating and cooling, and promote rapid drying of the sprayed material;

[0016] 2. The present invention promotes the reverse heating and wall heat dissipation after spraying by cooperating with the drying structure, the main structure and the retaining structure, so as to achieve deep penetration of the heated heat energy into the sprayed object, and form a temperature difference after uniform heating to promote volatilization and drying;

[0017] 3. The overall operation of the present invention is simple and convenient, the drying speed is fast, and single blow drying or rotary drying can be achieved by means of the rotation of the main structure, and the overall footprint is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the assembly structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the split structure of the main structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the split structure of the retention structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the split structure of the drying structure of the present invention;

[0022] Figure 5 For the present invention Figure 3 A local enlarged view of point A in FIG;

[0023] Figure 6 For the present invention Figure 3 A local enlarged view of point B in FIG;

[0024] Figure 7 For the present invention Figure 4A local enlarged view of point C in FIG;

[0025] Figure 8 For the present invention Figure 4 A local enlarged view of point D in FIG;

[0026] Figure 9 For the present invention Figure 1 A local enlarged view of point E in FIG;

[0027] Figure 10 For the present invention Figure 1 A partial enlarged view of point F in FIG.

[0028] In the figure: 1. Main structure; 11. Base; 12. First mounting frame; 13. Second mounting frame; 14. Motor; 15. First pulley; 16. Transmission belt; 17. Liquid pump; 18. Spraying assembly; 181. Electric push rod; 182. Slide; 183. Solenoid valve; 184. Spray head; 2. Retaining structure; 21. Flip frame; 22. Second pulley; 23. Sun gear; 24. Retaining assembly; 241. Spraying frame; 242. Second shaft; 243. Planetary gear; 244. Adjusting frame; 245. Adjusting bolt; 246. Clamping unit; 461. Clamping claw; 462. Torsion spring; 3. Drying structure; 31. Drying frame; 32. Fixing rod; 33. First fan; 34. Second fan; 35. Electric heating rod; 4. First shaft. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figures 1-10 The present invention provides a technical solution: a diaphragm coating device for lithium-ion batteries with a drying function, comprising a main structure 1, a retaining structure 2 and a drying structure 3; the retaining structure 2 is movably arranged on the main structure 1, and the drying structure 3 is fixedly arranged on the main structure 1 and movably inserted into the retaining structure 2.

[0031] As a preferred solution, further, the main structure 1 includes a base 11, a first mounting frame 12, a second mounting frame 13, a motor 14, a first pulley 15, a transmission belt 16, a liquid pump 17 and a spray assembly 18; the base 11 is a rectangular structure, the first mounting frame 12 is a concave structure, the first mounting frame 12 is fixedly arranged on the upper wall of the left end of the base 11, and is located on the center line, the first mounting frame 12 is provided with a first bearing in the right end, the second mounting frame 13 is a T-shaped structure, and it has three ends, one end of the second mounting frame 13 is fixed It is placed on the upper wall of the right end of the base 11 and is located in the middle. A first slide is provided in the middle of the left end of the second mounting frame 13. The motor 14 is fixedly arranged on the upper wall of the right end of the base 11 and is located between the first mounting frame 12 and the second mounting frame 13. The first pulley 15 is fixedly sleeved on the driving end of the motor 14. One end of the transmission belt 16 is movably sleeved on the first pulley 15. The liquid pump 17 is fixedly arranged on the upper wall of the left end of the second mounting frame 13. The spraying assembly 18 is fixedly arranged on the second mounting frame 13 and is connected to the liquid outlet end of the liquid pump 17 through a pipeline.

[0032] As a preferred embodiment, further, the spraying assembly 18 includes an electric push rod 181, a slide 182, a solenoid valve 183 and a pair of nozzles 184; the electric push rod 181 is fixedly arranged on the upper wall of the right end of the second mounting frame 13, one end of the slide 182 is movably embedded in the first slide groove of the second mounting frame 13, and the other end is located at the rear side of the second mounting frame 13, one end of the slide 182 is fixedly connected to the telescopic end of the electric push rod 181, and the other end of the slide 182 is located at the lower left end of the second mounting frame 13, the solenoid valve 183 is fixedly arranged on the rear side wall of the other end of the slide 182, one of the nozzles 184 is fixedly arranged under one end of the slide 182, wherein the other nozzle 184 is fixedly arranged on the other end of the slide 182 and is connected to one end of the solenoid valve 183, the spraying directions of the pair of nozzles 184 are relatively vertical, and the other end of the solenoid valve 183 and one of the nozzles 184 are respectively connected to the liquid outlet end of the liquid pump 17 through a pipeline.

[0033] As a preferred solution, further, the retaining structure 2 includes a flip frame 21, a second pulley 22, a sun gear 23 and two pairs of retaining components 24; the flip frame 21 is a cylindrical structure, and two pairs of switching grooves are equidistantly provided on the side wall at one end, and a second bearing is provided in the middle of the inner wall of one end of the switching groove, and a first shaft rod 4 is provided in the middle of the other end of the flip frame 21. The flip frame 21 is fixed to the first bearing at the right end of the first mounting frame 12 through the first shaft rod 4, and the second pulley 22 is fixedly mounted on the other end of the first shaft rod 4 and fits with the other end of the transmission belt 16. The sun gear 23 is fixedly set on the left side wall of the right end of the first mounting frame 12 and movably mounted on the first shaft rod 4. The two pairs of retaining components 24 are respectively movably set in the switching groove of the flip frame 21.

[0034] As a preferred solution, further, the retaining assembly 24 includes a spray frame 241, a second shaft 242, a planetary gear 243, an adjustment frame 244, a pair of adjustment bolts 245 and two pairs of clamping units 246; the spray frame 241 is a rectangular frame structure, the spray frame 241 is movably embedded in one of the rotation slots, and the front side wall of the left end of the spray frame 241 is provided with a first torsion slot near the upper and lower ends, and the upper and lower side walls of the spray frame 241 are provided with a second slide slot near the front end, one end of the second shaft 242 is fixedly connected to the middle of the right side wall of the spray frame 241, and the other end is fixed through the second bearing, and the planetary gear 24 3 is fixedly sleeved on the other end of the second shaft 242 and meshed with the sun gear 23. Both ends of the adjustment frame 244 are concave structures and have two ends respectively. The two ends of the adjustment frame 244 are movably embedded in the second slide groove, and the other two ends are respectively located on the front side of the spraying frame 241. The front side walls of the other two ends of the adjustment frame 244 are provided with second torsion grooves that are the same as the first torsion grooves. A pair of adjusting bolts 245 are respectively movably screwed into the two ends of the adjustment frame and are respectively fitted on the inner wall of the spraying frame 241. Two pairs of clamping units 246 are respectively movably provided at the first torsion groove and the second torsion groove, and are symmetrical to each other.

[0035] As a preferred embodiment, further, the clamping unit 246 is composed of a clamping jaw 461 and a torsion spring 462; the clamping jaw 461 is a V-shaped structure, and a force groove is provided in the middle part, the middle part of the clamping jaw 461 is movably provided in the middle part of the first torsion groove through a pin shaft, and the pin shaft movably passes through the force groove, and the clamping jaw 461 can be folded to a certain angle with the help of the pin shaft, and the torsion spring 462 is movably mounted on the pin shaft and is located in the force groove, one end of the torsion spring 462 is fixedly connected to one end of the clamping jaw 461, and the other end of the torsion spring 462 is fixedly connected to the inner wall of the first torsion groove.

[0036] As a preferred embodiment, further, the drying structure 3 includes a drying rack 31, a fixed rod 32, a plurality of first fans 33, a plurality of second fans 34 and a plurality of electric heating rods 35; the drying rack 31 is an octagonal structure, and the upper and lower side walls and the front and rear side walls are all horizontal walls, and the other four side walls of the drying rack 31 are all inclined walls, the upper and lower side walls of the drying rack 31 are each provided with a first air trough in the middle, and the left and right side walls are each provided with a first air inlet connected to the first air trough, the front and rear side walls of the drying rack 31 are each provided with a second air trough in the middle, and the left and right side walls of the drying rack 31 are each provided with a second air inlet connected to the second air trough, a third slide groove is provided in the upper and lower side walls near the front end of the second air trough, and the second air trough is provided near the left end Both the upper and lower sides are provided with a feeding port connected to the third slide. One end of the drying rack 31 is fixedly set on the left end of the first mounting frame 12, and the other end is movably inserted in the flip frame 21. One end of the fixing rod 32 is fixedly welded to the middle part of the side wall of one end of the drying rack 31, and the other end is fixed through the left end of the first mounting frame 12. Sliders are provided on the upper and lower side walls of several first fans 33. Several first fans 33 are respectively movably inserted into the third slide through the sliders to be embedded in the second air duct. Several second fans 34 are respectively equidistantly arranged on the front and rear side walls of the first air duct, and are located above the first air inlet. The two ends of several electric heating rods 35 are respectively fixedly set on the left and right side walls of the first air duct, and are located above the second fans 34.

[0037] As a preferred solution, further, the retaining components 24 on the upper and lower sides of the flip frame 21 and the retaining components 24 on the left and right sides are respectively oriented in opposite directions, that is, the clamping units 246 are alternately arranged on the outside and inside of the flip frame 21 to meet the design rotation requirements.

[0038] As a preferred solution, further, when the flip frame 21 rotates 90 degrees, the retaining assembly 24 rotates 180 degrees, which is used to meet the requirements of flip spraying, heating, drying and cooling.

[0039] As a preferred solution, further, the spray heads 184 correspond to the spray racks 241 above and at the rear of the flip rack 21 respectively, for double-sided spraying.

[0040] Example: According to the specification Figure 1-10 It can be seen that a method for using a lithium-ion battery diaphragm coating device with a drying function includes the following steps:

[0041] Step 1: First, place the equipment horizontally by placing the base 11 in the main structure 1 on the ground, connect the liquid inlet end of the liquid pump 17 to the feeding equipment, and then turn on the power;

[0042] Step 2: Press the clamping claws 461 in the clamping unit 246 at the four corners of the two ends of the diaphragm to be sprayed. After the clamping claws 461 are folded by the force of the torsion spring 462, they can be clamped to fix the two ends of the diaphragm on the spraying frame 241 and the adjustment frame 244 in the retaining assembly 24.

[0043] Step 3: While fixing, the position of the adjustment frame 244 in the spray frame 241 can be adjusted according to the length of the diaphragm, and then fastened with the adjustment bolt 245;

[0044] Step 4: The same operation as in step 2 is performed to simultaneously install the four diaphragms on the flip frame 21 in the retaining structure 2. Then, the motor 14 is controlled to drive the transmission belt 16 which is mounted on the first pulley 15 and the second pulley 22, thereby driving the flipping mechanism to rotate on the first mounting frame 12 via the first shaft 4.

[0045] Step 5: As the flip frame 21 rotates, the planetary gears 243 on the four second shafts 242 rotate around the sun gear 23, and through meshing transmission, the second shafts 242 are driven to rotate on the flip frame 21. When the flip frame 21 rotates 90 degrees, the positions of two adjacent diaphragms are swapped, and when the diaphragms rotate 180 degrees, the orientation of the side walls is changed.

[0046] Step 6: Then, the electric push rod 181 in the spray assembly 18 of the main structure 1 is controlled to be telescopically driven, driving the slide 182 to move on the second mounting frame 13, so that the spray head 184 located at one end of the diaphragm moves to the other end, and then the paint is drawn by the liquid pump 17 and sprayed on the diaphragm through the spray head 184 directly above the flip frame 21;

[0047] Step 7: As the rotation progresses, the solenoid valve 183 can be opened, and spraying can be performed with the help of the nozzle 184 on the rear side of the flip frame 21, thereby realizing double-station spraying and achieving spraying with different diaphragms, thereby achieving double-sided spraying, or staggered spraying by two nozzles 184 to achieve spraying on the same side wall;

[0048] Step 8. After spraying, the liquid pump 17 can be turned off, and then with the rotation of the turning frame 21, the diaphragm on the spraying frame 241 is driven to rotate continuously; it can be rotated slowly, and the sprayed wall surface is opposite to the electric heating rod 35 and the unsprayed wall surface of the sprayed single side is opposite to the first fan 33, so that it can be heated by the heating of the electric heating rod 35 and the hot air blown out by the second fan 34 to accelerate the drying; and after the sprayed surface is heated, it is cooled by a single blowing to make the surface temperature of the sprayed object penetrate into the inside to the back surface, so as to achieve rapid and uniform heating and drying and heat dissipation to blow away evaporated water molecules;

[0049] Step 9. After all four diaphragms are evenly sprayed on one side or both sides, and are relatively heated by the electric heating rod 35, the electric heating rod 35 can be turned off, and only the first fan 33 and the second fan 34 can be driven to blow and dry both sides; the motor 14 can also be driven alone to drive the turning frame 21 to rotate, and the entire diaphragm rotates to contact the air for drying and volatilization.

[0050] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A lithium-ion battery diaphragm coating device with a drying function, characterized in that: The invention comprises a main structure (1), a retaining structure (2) and a drying structure (3); the retaining structure (2) is movably arranged on the main structure (1), the drying structure (3) is fixedly arranged on the main structure (1) and movably inserted into the retaining structure (2); the main structure (1) is used for mobile spraying, the retaining structure (2) is used for fixing and turning over the diaphragm, and the drying structure (3) is used for heating and cooling the diaphragm during the turning process; The main structure (1) includes a base (11), a first mounting frame (12), a second mounting frame (13), a motor (14), a first pulley (15), a transmission belt (16), a liquid pump (17), and a spray assembly (18); The base (11) is a rectangular structure, the first mounting frame (12) is a concave structure, the first mounting frame (12) is fixedly arranged on the upper wall of the left end of the base (11), and a first bearing is arranged in the right end of the first mounting frame (12). The second mounting frame (13) is a T-shaped structure, one end of the second mounting frame (13) is fixedly arranged on the upper wall of the right end of the base (11), and a first slide groove is arranged in the middle of the left end of the second mounting frame (13). The motor (14) is fixedly arranged on the upper wall of the right end of the base (11) and is located between the first mounting frame (12) and the second mounting frame (13). The first pulley (15) is fixedly sleeved on the driving end of the motor (14), and one end of the transmission belt (16) is movably sleeved on the first pulley (15). The liquid pump (17) is fixedly arranged on the upper wall of the left end of the second mounting frame (13). The spraying assembly (18) is fixedly arranged on the second mounting frame (13) and is connected to the liquid outlet end of the liquid pump (17) through a pipeline. The retaining structure (2) includes a turning frame (21) and two pairs of retaining components (24); the turning frame (21) is a cylindrical structure, and two pairs of switching grooves are equidistantly opened on the side wall of one end, and the two pairs of retaining components (24) are movably arranged in the switching grooves of the turning frame (21); The retaining assembly (24) includes a spraying frame (241) and two pairs of clamping units (246); the spraying frame (241) is a rectangular frame structure, the spraying frame (241) is movably embedded in one of the rotation slots, and the two pairs of clamping units (246) are movably arranged on the spraying frame (241); The drying structure (3) comprises a drying rack (31), a fixing rod (32), a plurality of first fans (33), a plurality of second fans (34), and a plurality of electric heating rods (35); The drying rack (31) is an octagonal structure, and the upper and lower side walls and the front and rear side walls are all horizontal wall surfaces, and the other four side walls of the drying rack (31) are all inclined wall surfaces, the middle of the upper and lower side walls of the drying rack (31) are each provided with a first air trough, and the left and right side walls are each provided with a first air inlet connected to the first air trough, the middle of the front and rear side walls of the drying rack (31) are each provided with a second air trough, and the left and right side walls of the drying rack (31) are each provided with a second air inlet connected to the second air trough, a third chute is provided in the upper and lower side walls near the front end of the second air trough, and a delivery port connected to the third chute is provided on the upper and lower sides near the left end of the second air trough, and one end of the drying rack (31) is fixedly arranged on the first mounting bracket. The first fan (33) is mounted on the left end of the drying rack (12), and the other end is movably inserted into the turning rack (21) of the retaining structure (2). One end of the fixing rod (32) is fixedly welded to the middle of the side wall of one end of the drying rack (31), and the other end is fixedly passed through the left end of the first mounting rack (12). Sliders are provided on the upper and lower side walls of the plurality of first fans (33). The plurality of first fans (33) are respectively movably inserted into the third slide groove through the sliders to be embedded in the second air duct. The plurality of second fans (34) are respectively equidistantly arranged on the front and rear side walls of the first air duct and are located above the first air inlet. The two ends of the plurality of electric heating rods (35) are respectively fixedly arranged on the left and right side walls of the first air duct and are located above the second fans (34).

2. The lithium-ion battery separator coating device with a drying function according to claim 1, characterized in that: The spraying assembly (18) includes an electric push rod (181), a slide (182), a solenoid valve (183), and a pair of spray heads (184); The electric push rod (181) is fixedly arranged on the upper wall of the right end of the second mounting frame (13), one end of the slide (182) is movably embedded in the first slide groove of the second mounting frame (13), and the other end is located at the rear side of the second mounting frame (13), one end of the slide (182) is fixedly connected to the telescopic end of the electric push rod (181), and the other end of the slide (182) is located below the left end of the second mounting frame (13), the solenoid valve (183) is fixedly arranged on the rear side wall of the other end of the slide (182), one of the nozzles (184) is fixedly arranged under one end of the slide (182), and the other nozzle (184) is fixedly arranged on the other end of the slide (182) and connected to one end of the solenoid valve (183), the spraying directions of the pair of nozzles (184) are relatively vertical, and the other end of the solenoid valve (183) and one of the nozzles (184) are respectively connected to the liquid outlet end of the liquid pump (17) through a pipeline.

3. The lithium-ion battery separator coating device with a drying function according to claim 2, characterized in that: The retaining structure (2) further includes a second pulley (22) and a sun gear (23); A second bearing is provided at the middle of the inner side wall at one end of the switching groove, a first shaft (4) is provided at the middle of the other end of the flip frame (21), the flip frame (21) is fixed to the first bearing at the right end of the first mounting frame (12) through the first shaft (4), the second pulley (22) is fixedly mounted on the other end of the first shaft (4) and is fitted with the other end of the transmission belt (16), the sun gear (23) is fixedly mounted on the left side wall at the right end of the first mounting frame (12) and is movably mounted on the first shaft (4).

4. The lithium-ion battery separator coating device with a drying function according to claim 3, characterized in that: The retaining assembly (24) further includes a second shaft (242), a planetary gear (243), an adjustment frame (244), and a pair of adjustment bolts (245); The left front side wall of the spray frame (241) is provided with a first torsion groove near the upper and lower ends, and the upper and lower side walls inside the spray frame (241) are provided with a second slide groove near the front end. One end of the second shaft (242) is fixedly connected to the middle of the right side wall of the spray frame (241), and the other end is fixedly passed through the second bearing. The planetary gear (243) is fixedly sleeved on the other end of the second shaft (242) and meshed with the sun gear (23). Both ends of the adjustment frame (244) are concave structures. The two ends of the adjustment frame (244) are movably embedded in the second sliding groove, and the other two ends are respectively located on the front side of the spray frame (241). The front side walls of the other two ends of the adjustment frame (244) are both provided with second torsion grooves that are the same as and corresponding to the first torsion grooves. A pair of adjustment bolts (245) are respectively movably screwed into the two ends of the adjustment frame and respectively fit on the inner side walls of the spray frame (241). Two pairs of clamping units (246) are respectively movably set at the first torsion groove and the second torsion groove.

5. The lithium-ion battery separator coating device with a drying function according to claim 4, characterized in that: The clamping unit (246) is composed of a clamping claw (461) and a torsion spring (462); The clamping jaw (461) is a V-shaped structure, and a force-applying groove is provided in the middle. The middle of the clamping jaw (461) is movably provided in the middle of the first torsion groove through a pin shaft, and the pin shaft movably passes through the force-applying groove. The clamping jaw (461) can be folded by means of the pin shaft. The torsion spring (462) is movably mounted on the pin shaft and is located in the force-applying groove. One end of the torsion spring (462) is fixedly connected to one end of the clamping jaw (461), and the other end of the torsion spring (462) is fixedly connected to the inner wall of the first torsion groove.

6. The lithium-ion battery separator coating device with a drying function according to claim 5, characterized in that: The retaining assemblies (24) on the upper and lower sides of the turning frame (21) and the retaining assemblies (24) on the left and right sides face in opposite directions, that is, the clamping units (246) are alternately arranged on the outside and inside of the turning frame (21).

7. The lithium-ion battery separator coating device with a drying function according to claim 6, characterized in that: The spray heads (184) correspond to the spraying racks (241) above and at the rear of the turning rack (21), respectively.

8. The method for using the lithium-ion battery separator coating device with a drying function according to claim 7, characterized in that: The following steps are involved: Step (1), the cut diaphragm can be fixed on the spraying frame (241) by means of the retaining structure (2) with the help of the clamping unit (246); Step (2), then the turning frame (21) is driven to rotate by the driving motor (14), so that the diaphragm and the spraying assembly (18) are opposite to each other, and spraying can be achieved; Step (3), after spraying, as the turning frame (21) rotates, the spraying wall surface will rotate 180 degrees to be heated in correspondence with the electric heating rod (35) in the drying structure (3), and then rotate 180 degrees again to dissipate heat in correspondence with the first fan (33), thereby achieving a temperature difference to promote drying and dehumidification; Step (4) can also be dried by a single drive with the aid of the first fan (33) or by rapidly rotating the flip rack (21) for drying.

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