A segmented drying device for lithium battery separator processing

Abstract

This invention discloses a segmented drying device for lithium battery separator processing, relating to the field of lithium battery separator processing technology. It includes a machine body, a heating chamber fixedly mounted on the machine body, a fan fixedly mounted on the heating chamber, multiple static pressure chambers sequentially and segmentally fixedly mounted inside the machine body, each static pressure chamber having a fixed air nozzle connected to it. The heating chamber is connected to the inside of the static pressure chamber via an air inlet pipe. An outer shell is assembled at one end of the machine body, with an outlet for material discharge on one side. An inner shell is fixedly mounted inside the inner shell. An antistatic agent spraying and drying mechanism is installed at one end inside the inner shell and at the other end on the side of the inner shell. By using multiple static pressure chambers and multiple heating chambers, this invention can create drying zones with different temperatures within the machine body to perform segmented drying of the horizontally transported lithium battery separator. This reduces the temperature difference between the lithium battery separator and the outside environment when it is discharged from one side of the machine body, thereby protecting the lithium battery separator.

Description

Technical Field

[0001] This invention relates to the field of lithium battery separator processing technology, and in particular to a segmented drying device for lithium battery separator processing. Background Technology

[0002] The lithium battery separator is a key inner component of lithium-ion batteries. It is made of polyolefin materials such as polypropylene and polyethylene through dry or wet processes. Its main function is to separate the positive and negative electrodes to prevent short circuits and to enable lithium-ion transport through a microporous structure. Its thickness uniformity, mechanical strength, air permeability and thermal stability directly affect the battery performance. Power batteries usually use composite membranes with thermal stability and automatic shutdown protection. The coating of the separator is improved by using composite ceramics or organic materials to enhance puncture resistance and heat resistance.

[0003] In the dry process, lithium battery separators need to be dried. However, in the existing technology, the drying temperature of lithium battery separators in the drying equipment is fixed. When the lithium battery separator is taken out of the drying equipment, the large temperature difference between the inside and outside will damage the lithium battery separator. Moreover, since the moisture content of the lithium battery separator is low at this time, static electricity is easily generated, which will affect the normal transportation and winding of the lithium battery separator. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the above and / or existing segmented drying apparatus for lithium battery separator processing, the present invention is proposed.

[0006] Therefore, the problem to be solved by the present invention is how to solve the problem that when lithium battery separators are taken out of the drying equipment, the large temperature difference between the inside and outside will damage the lithium battery separators, and the low moisture content of the lithium battery separators at this time will easily generate static electricity, affecting the normal transportation and winding of the lithium battery separators.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a segmented drying device for lithium battery separator processing, used for drying lithium battery separators, including a machine body, a heating chamber fixedly installed on the machine body, a fan fixedly installed on the heating chamber, multiple static pressure chambers sequentially and segmentally fixedly installed inside the machine body, air nozzles fixedly connected to the static pressure chambers, the heating chambers being connected to the inside of the static pressure chambers through air inlet pipes, an outer shell assembled at one end of the machine body, with an outlet for material discharge on one side, an inner shell fixedly installed inside the outer shell, and an antistatic agent spraying and... The drying mechanism is installed at one end inside the inner shell and at the other end on the side of the inner shell. The auxiliary drying mechanism is fixedly installed on the side of the inner shell and connected to the antistatic agent spraying and drying mechanism. The fan delivers hot air from inside the heating chamber to the static pressure chamber through the air inlet pipe and sprays it onto the lithium battery separator through the air nozzle for drying. After the lithium battery separator is dried inside the machine, it enters the inner shell and is sprayed with antistatic agent by the antistatic agent spraying and drying mechanism. After spraying, it is dried by the synergistic action of the antistatic agent spraying and drying mechanism and the auxiliary drying mechanism.

[0008] As a preferred embodiment of the segmented drying device for lithium battery separator processing described in this invention, the antistatic agent spraying and drying mechanism includes a storage box installed on the inner wall of the outer shell, a waste heat recovery pipe connecting the machine body and the storage box, a pump body fixedly installed on the inner shell, a third conveying pipe fixedly installed on the inner shell, multiple first nozzles fixedly connected to the third conveying pipe, a fourth conveying pipe fixedly installed on the inner wall of the inner shell, and multiple second nozzles fixedly connected to the fourth conveying pipe and evenly distributed on both sides of the lithium battery separator. The input end of the pump body is connected to the storage box through the first conveying pipe, and the output end is connected to the third conveying pipe through the second conveying pipe. The fourth conveying pipe is connected to the storage box.

[0009] As a preferred embodiment of the segmented drying device for lithium battery separator processing described in this invention, the top of the storage box is fixedly connected to a replenishment pipe, and a heat exchange coil is fixedly connected between the first conveying pipe and the waste heat recovery pipe, and the heat exchange coil is fixedly installed in the storage box.

[0010] As a preferred embodiment of the segmented drying device for lithium battery separator processing described in this invention, the auxiliary drying mechanism includes: a drive box fixedly connected to a second conveying pipe; an impeller rotatably connected inside the drive box; a rotating shaft coaxially fixedly connected to the impeller, with one end extending to the outside; a first swing arm, one end of which is fixedly connected to the rotating shaft; a connecting arm hinged to the other end of the first swing arm; a base, one end of which is hinged to one end of the connecting arm and vertically slidably connected to the inner shell; two drive rollers fixedly connected between the two bases; and the lithium battery separator located between the two drive rollers. Airflow passes through the drive box to drive the impeller to rotate, so that the impeller drives the first swing arm and the connecting arm to move through the rotating shaft, thereby realizing the vertical reciprocating motion of the base, which in turn causes the two drive rollers to drive the lithium battery separator to move vertically reciprocatingly.

[0011] As a preferred embodiment of the segmented drying device for lithium battery separator processing described in this invention, the heating box has a waste discharge pipe fixedly connected to its side and a make-up air pipe fixedly connected to its top surface.

[0012] As a preferred embodiment of the segmented drying device for lithium battery separator processing described in this invention, wherein: conveying rollers are rotatably connected to both sides of the machine body, the conveying rollers are used to convey the lithium battery separator, and one of the conveying rollers is installed inside the outer shell.

[0013] As a preferred embodiment of the segmented drying device for lithium battery separator processing described in this invention, it further includes a spreading mechanism, which includes a traction plate horizontally slidably connected inside the inner housing, a wiping roller located below the traction plate, a connecting shaft coaxially fixedly connected to one end of the wiping roller and rotatably connected to the traction plate, a splined shaft coaxially fixedly connected to one end of the connecting shaft, and a bushing with one end rotatably connected to the inner side wall of the inner housing and the other end keyed to the splined shaft. The traction plate drives the wiping roller to move horizontally through the connecting shaft, while the connecting shaft drives the splined shaft to move axially on the bushing.

[0014] As a preferred embodiment of the segmented drying device for lithium battery separator processing described in this invention, the wiping mechanism further includes a motor mounted on the inner housing via a frame, a first gear keyed to the output end of the motor, a second gear meshing with the first gear, a main shaft rotatably connected to the inner housing, a second gear fixedly connected to the main shaft, a slide groove formed on a traction plate, a second swing arm fixedly connected to the main shaft, and a slider fixedly connected to the other end of the second swing arm and slidably connected in the slide groove. The motor drives the first gear to rotate, and the first gear drives the main shaft to rotate via the second gear, so that the main shaft drives the slider to revolve via the second swing arm. The slider achieves horizontal reciprocating motion of the wiping roller through its cooperation with the slide groove.

[0015] As a preferred embodiment of the segmented drying device for lithium battery separator processing described in this invention, the device further includes a traction mechanism comprising a drive plate sleeved on the main shaft, a connecting part fixedly connected below the drive plate, a drive seat fixedly connected to the bushing, a traction groove formed on the drive seat, and a traction block fixedly connected to the connecting part and slidably connected in the traction groove. When the drive plate moves downward, it drives the traction block to move downward synchronously through the connecting part. Through the cooperation with the traction groove, the bushing is driven to rotate, thereby causing the bushing to drive the wiping roller to rotate through the spline shaft and the connecting shaft.

[0016] In a preferred embodiment of the segmented drying device for lithium battery separator processing described in this invention, a guide block is fixedly connected to the inner wall of the drive plate, a guide groove is formed on the surface of the main shaft, and the guide block is slidably connected in the guide groove.

[0017] The beneficial effects of this invention are:

[0018] 1. By setting up multiple static pressure chambers and multiple heating chambers, the present invention can set up drying zones with different temperatures in sections inside the machine body to dry the horizontally transported lithium battery separator in sections, thereby reducing the temperature difference between the lithium battery separator and the outside when it is discharged from one side of the machine body, thus protecting the lithium battery separator.

[0019] 2. This invention, through the setting of an antistatic agent spraying and drying mechanism and an auxiliary drying mechanism, can spray liquid antistatic agent onto the surface of the lithium battery separator inside the outer casing. The antistatic agent can be heated by the residual heat inside the machine to prevent damage to the lithium battery separator due to excessively low temperature. At the same time, the residual heat inside the machine can be directly sprayed onto the surface of the lithium battery separator after being cooled by the room temperature antistatic agent. This can dry the antistatic agent on the one hand, and further reduce the temperature difference between the lithium battery separator and the outside environment on the other hand, so as to further protect the lithium battery separator. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the main structure of a segmented drying device for lithium battery separator processing.

[0022] Figure 2 This is a schematic diagram of the internal structure of a segmented drying device for lithium battery separator processing.

[0023] Figure 3This is a cross-sectional structural diagram of the outer shell of a segmented drying device for lithium battery separator processing.

[0024] Figure 4 This is a schematic diagram of the main structure of the inner shell in a segmented drying device for lithium battery separator processing.

[0025] Figure 5 This is a schematic diagram of the main structure of the antistatic agent spraying and drying mechanism in a segmented drying device for lithium battery separator processing.

[0026] Figure 6 This is a schematic diagram of the main structure of the heat exchange coil in a segmented drying device for lithium battery separator processing.

[0027] Figure 7 This is a schematic diagram of the main structure of the auxiliary drying mechanism in a segmented drying device for lithium battery separator processing.

[0028] Figure 8 This is a schematic diagram of the internal structure of the drive box in a segmented drying device for lithium battery separator processing.

[0029] Figure 9 This is a schematic diagram of the main structure of the spreading mechanism in a segmented drying device for lithium battery separator processing.

[0030] Figure 10 A segmented drying device for lithium battery separator processing Figure 9 A magnified structural diagram of area A in the middle.

[0031] Figure 11 This is a schematic diagram of the main structure of the guide groove in a segmented drying device for lithium battery separator processing.

[0032] In the diagram: 1. Lithium battery separator; 2. Main body; 3. Heating chamber; 4. Fan; 5. Inlet pipe; 6. Waste discharge pipe; 7. Make-up air pipe; 8. Outer shell; 81. Outlet; 9. Static pressure chamber; 10. Nozzle; 11. Inner shell; 12. Antistatic agent spraying and drying mechanism; 121. Storage box; 1211. Make-up pipe; 122. Waste heat recovery pipe; 123. First conveying pipe; 1231. Heat exchange coil; 124. Pump body; 125. Second conveying pipe; 126. Third conveying pipe; 127. First nozzle; 128. Fourth conveying pipe; 129. Second nozzle; 13. Auxiliary drying mechanism; 131. Drive box; 13 2. Rotating shaft; 133. First swing arm; 134. Connecting arm; 135. Base; 136. Drive roller; 137. Impeller; 14. Spreading mechanism; 141. Motor; 142. First gear; 143. Second gear; 1431. Main shaft; 1432. Guide groove; 1433. Second swing arm; 1434. Slider; 144. Traction plate; 145. Slide groove; 146. Wiping roller; 147. Connecting shaft; 148. Splined shaft; 149. Bushing; 15. Traction mechanism; 151. Connecting part; 152. Drive seat; 153. Traction groove; 154. Traction block; 155. Drive plate; 16. Conveying roller. Detailed Implementation

[0033] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0035] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0036] Example 1, referring to Figure 1This is the first embodiment of the present invention, which provides a segmented drying device for processing lithium battery separators, used to dry lithium battery separators 1. It includes a body 2, a heating chamber 3 fixedly mounted on the body 2, a fan 4 fixedly mounted on the heating chamber 3, eight static pressure chambers 9 sequentially and segmentally fixedly mounted inside the body 2, air nozzles 10 fixedly connected to the static pressure chambers 9, the heating chamber 3 connected to the inside of the static pressure chambers 9 via air inlet pipes 5, an outer shell 8 assembled at one end of the body 2, with an outlet 81 for discharging material on one side, an inner shell 11 fixedly mounted inside the outer shell 8, and an antistatic agent spraying and drying mechanism 1. 2. One end is installed inside the inner shell 11, and the other end is installed on the side of the inner shell 11. The auxiliary drying mechanism 13 is fixedly installed on the side of the inner shell 11 and connected to the antistatic agent spraying and drying mechanism 12. The fan 4 delivers the hot air inside the heating box 3 to the static pressure box 9 through the air inlet pipe 5, and sprays it onto the lithium battery separator 1 through the air nozzle 10 for drying. After the lithium battery separator 1 is dried in the machine body 2, it enters the inner shell 11 and is sprayed with antistatic agent by the antistatic agent spraying and drying mechanism 12. After spraying, it is dried by the synergistic action of the antistatic agent spraying and drying mechanism 12 and the auxiliary drying mechanism 13.

[0037] Please see Figures 1 to 3 The lithium battery separator 1 is conveyed in the machine body 2 by conventional conveyor rollers. Both sides of the lithium battery separator 1 are dried when they pass through the air nozzles 10. Since the eight static pressure boxes 9 are set in sections, the temperature of each static pressure box 9 is different in the horizontal direction, so gradient drying of the lithium battery separator 1 can be achieved. When the lithium battery separator 1 enters the inner shell 11, the antistatic agent spraying and drying mechanism 12 can spray antistatic agent on both sides of the lithium battery separator 1 and dry the lithium battery separator 1 again. On the one hand, it is to dry the antistatic agent on the surface of the lithium battery separator 1, and on the other hand, it is to dry the lithium battery separator 1 again at low temperature to reduce the temperature difference between the lithium battery separator 1 and the outside. The auxiliary drying mechanism 13 can drive the lithium battery separator 1 to reciprocate in the vertical direction. When the lithium battery separator 1 moves, it can fully contact the low temperature gas from the antistatic agent spraying and drying mechanism 12, so as to achieve more thorough drying of the lithium battery separator 1.

[0038] It should be noted that the heating chamber 3 is equipped with an electric heating tube, and the temperature is regulated by a controller. The fan 4 delivers outside air to the heating chamber 3 for heating, and then discharges it to the static pressure chamber 9 through the air inlet pipe 5. Finally, it is sprayed onto the surface of the lithium battery separator 1 through the air nozzle 10 to dry it. The specific structure and working principle of the electric heating tube, the fan 4 and the static pressure chamber 9 are well known to those skilled in the art, and will not be described in detail here.

[0039] The antistatic agent spraying and drying mechanism 12 includes a storage box 121 installed on the inner wall of the outer shell 8, a waste heat recovery pipe 122 connecting the body 2 and the storage box 121, a pump body 124 fixedly installed on the inner shell 11, a third delivery pipe 126 fixedly installed on the inner shell 11, a first nozzle 127 fixedly connected to the third delivery pipe 126, a fourth delivery pipe 128 fixedly installed on the inner wall of the inner shell 11, and a second nozzle 129 fixedly connected to the fourth delivery pipe 128 and evenly distributed on both sides of the lithium battery separator 1. The input end of the pump body 124 is connected to the storage box 121 through the first delivery pipe 123, and the output end is connected to the third delivery pipe 126 through the second delivery pipe 125. The fourth delivery pipe 128 is connected to the storage box 121.

[0040] Please see Figures 4 to 6 The pump body 124 recovers waste heat from the machine body 2 through the first delivery pipe 123 and the waste heat recovery pipe 122. At this time, the gas with waste heat enters the storage box 121, and then is transported through the second delivery pipe 125 and the third delivery pipe 126 under the action of the pump body 124. Finally, it is discharged to the surface of the lithium battery separator 1 through the first nozzle 127. However, the temperature of the gas with waste heat is still high. Therefore, in this embodiment, a supplementary pipe 1211 is fixedly connected to the top of the storage box 121. A heat exchange coil 1231 is fixedly connected between the first delivery pipe 123 and the waste heat recovery pipe 122. The heat exchange coil 1231 is fixedly installed in the storage box 121.

[0041] Specifically, room-temperature liquid antistatic agent can be replenished to the storage box 121 through the replenishment pipe 1211. The gas with residual heat can enter the heat exchange coil 1231 through the waste heat recovery pipe 122. At this time, the gas with residual heat in the heat exchange coil 1231 can exchange heat with the room-temperature liquid antistatic agent. The cooled gas is sprayed on the surface of the lithium battery separator 1. At this time, the gas temperature is lower than the gas temperature at the end of the machine body 2, which further realizes the gradient drying of the lithium battery separator 1. Since the lithium battery separator 1 is covered with antistatic agent at this time, the drying of the antistatic agent can also be accelerated. The temperature of the antistatic agent after heat exchange is increased, which can prevent the lithium battery separator 1 from being damaged by excessively low temperature after being sprayed on the surface of the lithium battery separator 1.

[0042] It should be noted that since the antistatic agent will drip off under the action of gravity after contacting the bottom surface of the lithium battery separator 1, the bottom surface of the inner shell 11 is set as a detachable structure, such as bolt connection or buckle connection, so as to facilitate periodic opening of the inner shell 11 for cleaning.

[0043] It should be noted that the maximum drying temperature of the lithium battery separator 1 inside the body 2 is 100 degrees Celsius. After gradient cooling inside the body 2, the residual heat temperature that is finally recycled from the body 2 is between 30 and 40 degrees Celsius. This temperature will not cause solvent condensation or contamination of the antistatic agent.

[0044] The auxiliary drying mechanism 13 includes a drive box 131, which is fixedly connected to the second conveying pipe 125; an impeller 137, which is rotatably connected inside the drive box 131; a rotating shaft 132, which is coaxially fixedly connected to the impeller 137 and has one end extending to the outside; a first swing arm 133, one end of which is fixedly connected to the rotating shaft 132; a connecting arm 134, which is hinged to the other end of the first swing arm 133; a base 135, one end of which is hinged to one end of the connecting arm 134 and vertically slidably connected to the inner shell 11; two drive rollers 136, which are fixedly connected between the two bases 135; and a lithium battery separator 1, which is located between the two drive rollers 136. The airflow passes through the drive box 131 to drive the impeller 137 to rotate, so that the impeller 137 drives the first swing arm 133 and the connecting arm 134 to move through the rotating shaft 132, thereby realizing the vertical reciprocating motion of the base 135, which in turn causes the two drive rollers 136 to drive the lithium battery separator 1 to move vertically reciprocatingly.

[0045] Please see Figure 7 and Figure 8 The cooled gas is conveyed through the second conveying pipe 125 to the drive box 131. When the gas passes through the drive box 131, it drives the impeller 137 to rotate, which in turn drives the rotating shaft 132 to rotate synchronously. The rotating shaft 132 then drives the first swing arm 133 to rotate and make one end of it revolve. The revolving end of the first swing arm 133 drives the connecting arm 134 to rotate. When the two first swing arms 133 move simultaneously, they drive the base 135 to reciprocate vertically under the transmission of the connecting arm 134. This causes the base 135 to drive the lithium battery separator 1 to reciprocate vertically through the two drive rollers 136 distributed on both sides of the lithium battery separator 1. At this time, the lithium battery separator 1 is in motion, which accelerates the air flow near the lithium battery separator 1, thus greatly speeding up the drying speed of the lithium battery separator 1.

[0046] It should be noted that in this embodiment, the drive box 131 itself is a detachable structure. For example, one side of the drive box 131 is mounted on it with screws. Therefore, the drive box 131 can be disassembled periodically to clean the impeller 137 and the shaft 132 inside, so as to prevent the surface scale from causing dynamic balance failure.

[0047] The side of the heating box 3 is fixedly connected to the exhaust pipe 6, and the top surface of the heating box 3 is fixedly connected to the air supply pipe 7. Both sides of the machine body 2 are rotatably connected to the conveying rollers 16, which are used to convey the lithium battery separator 1. One of the conveying rollers 16 is installed inside the outer shell 8.

[0048] Please see Figure 1 and Figure 2 The exhaust pipe 6 is used to discharge the exhaust gas inside the heating box 3, the air supply pipe 7 is used to replenish the drying air into the machine body 2, and the conveying roller 16 is used to assist in conveying the lithium battery separator 1.

[0049] Example 2, please refer to Figures 9 to 11 This is the second embodiment of the present invention.

[0050] It also includes a wiping mechanism 14, which includes a traction plate 144, which is horizontally slidably connected inside the inner housing 11; a wiping roller 146, which is located below the traction plate 144; a connecting shaft 147, which is coaxially fixedly connected to one end of the wiping roller 146 and rotatably connected to the traction plate 144; a splined shaft 148, which is coaxially fixedly connected to one end of the connecting shaft 147; and a bushing 149, one end of which is rotatably connected to the inner side wall of the inner housing 11, and the other end of which is keyed to the splined shaft 148. The traction plate 144 drives the wiping roller 146 to move horizontally through the connecting shaft 147, while the connecting shaft 147 drives the splined shaft 148 to move axially on the bushing 149.

[0051] The wiping mechanism 14 also includes a motor 141, which is mounted on the inner housing 11 via a frame; a first gear 142, which is keyed to the output end of the motor 141; a second gear 143, which meshes with the first gear 142; a main shaft 1431, which is rotatably connected to the inner housing 11; a second gear 143, which is fixedly connected to the main shaft 1431; a slide groove 145, which is formed on the traction plate 144; a second swing arm 1433, which is fixedly connected to the main shaft 1431; and a slider 1434, which is fixedly connected to the other end of the second swing arm 1433 and slidably connected in the slide groove 145. The motor 141 drives the first gear 142 to rotate, and the first gear 142 drives the main shaft 1431 to rotate through the second gear 143, so that the main shaft 1431 drives the slider 1434 to revolve through the second swing arm 1433. The slider 1434 achieves the horizontal reciprocating motion of the wiping roller 146 through its cooperation with the slide groove 145.

[0052] Please see Figure 4 , Figure 9 and Figure 10The motor 141 drives the first gear 142 to rotate, and the first gear 142 drives the main shaft 1431 to rotate through the second gear 143. When the main shaft 1431 rotates, it can drive the second swing arm 1433 to rotate, which in turn causes the second swing arm 1433 to drive the slider 1434 to revolve. Since the slider 1434 is slidably connected in the slide groove 145, when the slider 1434 revolves in one direction, it can cooperate with the slide groove 145 to drive the traction plate 144 to perform horizontal reciprocating motion. At this time, the traction plate 144 can drive the wiping roller 146 to perform horizontal reciprocating motion through the connecting shaft 147. At this time, the wiping roller 146 reciprocates perpendicular to the conveying direction of the lithium battery separator 1 to achieve the even application of the antistatic agent on the surface of the lithium battery separator 1.

[0053] It should be noted that the spline shaft 148 and the bushing 149 are used to fix the wiping roller 146 horizontally. Therefore, when the wiping roller 146 moves horizontally back and forth, it can drive the spline shaft 148 to move axially back and forth in the bushing 149 through the connecting shaft 147.

[0054] It also includes a traction mechanism 15, which includes a drive plate 155 sleeved on the main shaft 1431, a connecting part 151 fixedly connected below the drive plate 155, a drive seat 152 fixedly connected to the bushing 149, a traction groove 153 formed on the drive seat 152, and a traction block 154 fixedly connected to the connecting part 151 and slidably connected in the traction groove 153. When the drive plate 155 moves down, it drives the traction block 154 to move down synchronously through the connecting part 151. Through the cooperation with the traction groove 153, it drives the bushing 149 to rotate, thereby causing the bushing 149 to drive the wiping roller 146 to rotate through the spline shaft 148 and the connecting shaft 147. A guide block is fixedly connected to the inner wall of the drive plate 155, and a guide groove 1432 is formed on the surface of the main shaft 1431. The guide block is slidably connected in the guide groove 1432.

[0055] Please see Figure 10 and Figure 11When the main shaft 1431 rotates, it drives the guide groove 1432 to rotate synchronously. The guide groove 1432 is formed by two identical spiral grooves symmetrically connected end to end on the main shaft 1431. The projection of each spiral groove on the horizontal plane is 180 degrees. The guide block is a spherical protrusion that can move unidirectionally along the guide groove 1432. After the main shaft 1431 rotates one revolution, the guide block rises and then falls, eventually returning to the original point. From the above, it can be seen that when the main shaft 1431 rotates... The guide groove 1432, in cooperation with the guide block, drives the drive plate 155 to reciprocate vertically. When the drive plate 155 moves downward, it drives the connecting part 151 to move downward synchronously. At this time, the connecting part 151 drives the traction block 154 to move downward synchronously. Since the traction block 154 is fixed in the horizontal direction, when the traction block 154 descends, it can cooperate with the traction groove 153 to drive the drive seat 152 to rotate, thereby causing the drive seat 152 to drive the bushing 14. 9. Rotation ultimately causes the bushing 149 to drive the wiping roller 146 to rotate via the splined shaft 148 and connecting shaft 147. In this embodiment, the cross-sectional projection of the wiping roller 146 is square, and the edges of the wiping roller 146 are rounded. Initially, the angle between the drive seat 152 and the horizontal plane is 45 degrees. When the connecting part 151 descends, the drive seat 152 is driven to rotate to a 0-degree angle with the horizontal plane under the cooperation of the traction groove 153 and the traction block 154. At this time, the wiping roller 146 rotates exactly 45 degrees. This causes the wiping roller 146 to switch from contacting the lithium battery separator 1 from its initial side to contacting the lithium battery separator 1 from its side edge. The four wiping rollers 146 are staggered on both sides of the lithium battery separator 1. This allows the lithium battery separator 1 to be tensioned when all four wiping rollers 146 rotate 45 degrees. Therefore, this embodiment can achieve periodic adjustment of the tension of the lithium battery separator 1 in order to release the stress inside the lithium battery separator 1, and at the same time, it can make the antistatic agent more evenly applied to the surface of the lithium battery separator 1.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A segmented drying apparatus for processing lithium battery separators, used for drying lithium battery separators (1), comprising a body (2), characterized in that, Also includes: The heating box (3) is fixedly installed on the machine body (2); The fan (4) is fixedly installed on the heating box (3). Multiple static pressure boxes (9) are installed sequentially and in sections inside the body (2). Air nozzles (10) are fixedly connected to the static pressure boxes (9). The heating box (3) is connected to the inside of the static pressure box (9) through the air inlet pipe (5). The outer shell (8) is assembled at one end of the machine body (2), and an outlet (81) for discharging material is provided on one side. The inner shell (11) is fixedly installed inside the outer shell (8); The antistatic agent spraying and drying mechanism (12) is installed at one end inside the inner shell (11) and at the other end on the side of the inner shell (11); An auxiliary drying mechanism (13) is fixedly installed on the side of the inner shell (11) and connected to the antistatic agent spraying and drying mechanism (12); The antistatic agent spraying and drying mechanism (12) includes: Storage box (121) is installed on the inner side wall of the outer casing (8); Waste heat recovery pipe (122) is connected between the body (2) and the storage box (121); The pump body (124) is fixedly installed on the inner casing (11); The third delivery pipe (126) is fixedly installed on the inner shell (11); Multiple first nozzles (127) are fixedly connected to the third delivery pipe (126); The fourth delivery pipe (128) is fixedly installed on the inner wall of the inner shell (11); Multiple second nozzles (129) are fixedly connected to the fourth delivery pipe (128) and evenly distributed on both sides of the lithium battery separator (1); The input end of the pump body (124) is connected to the storage box (121) through the first delivery pipe (123), and the output end is connected to the third delivery pipe (126) through the second delivery pipe (125). The fourth delivery pipe (128) is connected to the storage box (121). The fan (4) delivers the hot air inside the heating box (3) to the static pressure box (9) through the air inlet pipe (5), and sprays it onto the lithium battery separator (1) through the air nozzle (10) for drying. After the lithium battery separator (1) is dried in the body (2), it enters the inner shell (11) and is sprayed with antistatic agent by the antistatic agent spraying and drying mechanism (12). After spraying, it is dried by the synergistic action of the antistatic agent spraying and drying mechanism (12) and the auxiliary drying mechanism (13).

2. The segmented drying apparatus for lithium battery separator processing according to claim 1, characterized in that, The top of the storage box (121) is fixedly connected to a replenishment pipe (1211), and a heat exchange coil (1231) is fixedly connected between the first conveying pipe (123) and the waste heat recovery pipe (122). The heat exchange coil (1231) is fixedly installed in the storage box (121).

3. A segmented drying apparatus for lithium battery separator processing according to claim 1 or 2, characterized in that, The auxiliary drying mechanism (13) includes: The drive box (131) is fixedly connected to the second delivery pipe (125); The impeller (137) is rotatably connected inside the drive housing (131); A rotating shaft (132) is coaxially fixedly connected to the impeller (137), with one end extending to the outside. The first swing arm (133) has one end fixedly connected to the rotating shaft (132); The connecting arm (134) is hinged to the other end of the first swing arm (133); The base (135) is hinged at one end to one end of the connecting arm (134) and vertically slidably connected to the inner shell (11); Two drive rollers (136) are fixedly connected between two bases (135), and the lithium battery separator (1) is located between the two drive rollers (136); The airflow drives the impeller (137) to rotate through the drive box (131), so that the impeller (137) drives the first swing arm (133) and the connecting arm (134) to move through the rotating shaft (132), so as to realize the vertical reciprocating motion of the base (135), thereby causing the two drive rollers (136) to drive the lithium battery separator (1) to move vertically and reciprocatingly.

4. The segmented drying apparatus for lithium battery separator processing according to claim 1, characterized in that, The side of the heating box (3) is fixedly connected to a waste discharge pipe (6), and the top surface of the heating box (3) is fixedly connected to a make-up air pipe (7).

5. A segmented drying apparatus for lithium battery separator processing according to claim 1, characterized in that, Both sides of the body (2) are rotatably connected to conveying rollers (16), which are used to convey lithium battery separators (1), and one of the conveying rollers (16) is installed inside the outer shell (8).

6. A segmented drying apparatus for lithium battery separator processing according to claim 1 or 2, characterized in that, It also includes a smoothing mechanism (14), which includes: The traction plate (144) is horizontally slidably connected inside the inner housing (11); The wiping roller (146) is located below the traction plate (144); The connecting shaft (147) is coaxially fixedly connected to one end of the wiping roller (146) and rotatably connected to the traction plate (144); The spline shaft (148) is coaxially fixedly connected to one end of the connecting shaft (147); The bushing (149) is rotatably connected at one end to the inner wall of the inner housing (11), and at the other end is keyed to the spline shaft (148); The traction plate (144) drives the wiping roller (146) to move horizontally via the connecting shaft (147), while the connecting shaft (147) drives the spline shaft (148) to move axially on the bushing (149).

7. A segmented drying apparatus for lithium battery separator processing according to claim 6, characterized in that, The spreading mechanism (14) further includes: The motor (141) is mounted on the inner housing (11) via a frame; The first gear (142) is keyed to the output end of the motor (141); The second gear (143) meshes with the first gear (142); The main shaft (1431) is rotatably connected to the inner housing (11), and the second gear (143) is fixedly connected to the main shaft (1431); A chute (145) is formed on the traction plate (144); The second swing arm (1433) is fixedly connected to the main shaft (1431); The slider (1434) is fixedly connected to the other end of the second swing arm (1433) and slidably connected in the groove (145); The motor (141) drives the first gear (142) to rotate, and the first gear (142) drives the main shaft (1431) to rotate through the second gear (143), so that the main shaft (1431) drives the slider (1434) to revolve through the second swing arm (1433). The slider (1434) realizes the horizontal reciprocating motion of the wiping roller (146) through the cooperation with the slide groove (145).

8. A segmented drying apparatus for lithium battery separator processing according to claim 7, characterized in that, It also includes a traction mechanism (15), which comprises: The drive plate (155) is fitted onto the spindle (1431); The connecting part (151) is fixedly connected to the bottom of the drive board (155); Drive seat (152), drive seat (152) is fixedly connected to bushing (149); A traction groove (153) is provided on the drive seat (152); The traction block (154) is fixedly connected to the connecting part (151) and slidably connected in the traction groove (153); When the drive plate (155) moves down, it drives the traction block (154) to move down synchronously through the connecting part (151). Through the cooperation with the traction groove (153), it drives the bushing (149) to rotate, which in turn causes the bushing (149) to drive the wiping roller (146) to rotate through the spline shaft (148) and the connecting shaft (147).

9. A segmented drying apparatus for lithium battery separator processing according to claim 8, characterized in that, The inner wall of the drive plate (155) is fixedly connected to a guide block, and the surface of the main shaft (1431) is provided with a guide groove (1432), and the guide block is slidably connected in the guide groove (1432).

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