Lithium battery separator extraction and drying apparatus and method of use

Abstract

The application discloses a lithium battery diaphragm extraction drying device and a use method, relates to the technical field of lithium battery diaphragm production, and comprises a machine shell, a rotating roller group for conveying diaphragms is arranged in the machine shell, a bubble removing assembly is arranged on the conveying path of the battery diaphragm, the bubble removing assembly comprises a vibrating cylinder, a vibrating piece is slidably arranged on the inner wall of the vibrating cylinder, a pressing piece for pressing the diaphragm is arranged on one side of the vibrating cylinder, and a driving assembly for driving the vibrating piece and the pressing piece to move synchronously is arranged at one end of the vibrating cylinder; the bubble removing assembly of the application is close to the diaphragm through the vibrating cylinder, the separation of the bubble and the diaphragm is assisted by vibration, and the bubble removing efficiency is effectively improved; the vibrating piece is slidably arranged, the vibrating position can be flexibly adjusted, direct vibration operation can be conveniently performed on the bubble position, and then the bubble can be conveniently dispersed and separated.

Description

Technical Field

[0001] This invention relates to the field of lithium battery separator production technology, specifically a lithium battery separator extraction and drying apparatus and its usage method. Background Technology

[0002] In the wet production process of lithium battery separators, after extraction, some micropores of the separator still contain extract. The presence of extract causes uneven drying of the separator. After drying, some areas retain extract or have accumulated air bubbles, which reduces the quality of the separator and affects its use.

[0003] Existing drying equipment typically uses a defoaming assembly to roll and press the material to remove excess extract and air bubbles, followed by drying through circulating air. However, the defoaming assembly using this rolling method is ineffective at removing air bubbles adhering to the microporous structure of the diaphragm, thus necessitating an improvement. Summary of the Invention

[0004] The purpose of this invention is to provide a lithium battery separator extraction and drying apparatus and a method for using it, so as to solve the problem of poor removal effect of air bubbles in the separator mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A lithium battery separator extraction and drying device includes a housing, inside which is a set of rotating rollers for conveying the separator. A defoaming assembly is provided on the conveying path of the battery separator. The defoaming assembly includes a vibrating cylinder. A vibrating element is slidably mounted on the inner wall of the vibrating cylinder. A pressing element for pressing the separator is provided on one side of the vibrating cylinder. A driving assembly for driving the vibrating element and the pressing element to move synchronously is provided at one end of the vibrating cylinder.

[0006] As a further aspect of the present invention: the vibrating component includes a sliding ring, the outer wall of the sliding ring is fixedly connected with a plurality of limiting blocks, the inner wall of the vibrating cylinder is provided with a plurality of limiting grooves, the plurality of limiting blocks are slidably connected to the plurality of limiting grooves, and a plurality of vibrators are fixedly installed on the inner wall of the sliding ring.

[0007] As a further aspect of the present invention: the pressing component includes a mounting base, a pressing frame is slidably disposed on one side of the mounting base, a contact pad is fixedly connected to one side of the pressing frame, and an electric heating wire is embedded inside the contact pad.

[0008] As a further aspect of the present invention: the driving assembly includes a driving frame, a driving motor is fixedly installed inside the driving frame, a driving gear is fixedly connected to the output end of the driving motor, two transmission gears are respectively meshed on both sides of the driving gear, a main transmission screw and a secondary transmission screw are respectively fixedly connected to the middle part of the two transmission gears; the middle part of the main transmission screw is threadedly connected to the middle part of the sliding ring, a limit rod is fixedly connected to one side of the driving frame, the top of the mounting base is slidably connected to the limit rod, and the middle part of the mounting base is threadedly connected to the secondary transmission screw.

[0009] As a further aspect of the present invention: a detection component for detecting the diaphragm is provided above the defoaming component. The detection component includes a detection frame, and a through groove for the diaphragm to pass through is opened in the middle of the detection frame. Two contact plates are symmetrically installed on the inner wall of the detection frame. A detection lamp is fixedly installed at the bottom of one contact plate, and a detection camera is fixedly installed at the bottom of the other contact plate.

[0010] As a further embodiment of the present invention: a partition plate is fixedly connected to one side of each of the two contact plates, a flow guiding cavity is provided between the partition plate and the inner wall of the detection frame, the top two sides of the detection frame are both set as inclined surfaces, a flow guiding port is opened in the middle of each of the two inclined surfaces, the flow guiding port is connected to the flow guiding cavity, and a flow guiding pipe is fixedly connected to the bottom of one side of the flow guiding cavity.

[0011] As a further aspect of the present invention: a negative pressure cavity is provided between the partition plate and the contact plate, and a plurality of extraction holes are provided on the contact plate at the position corresponding to the negative pressure cavity. A negative pressure pipe is fixedly connected to the bottom of one side of the negative pressure cavity, and one end of the negative pressure pipe is fixedly connected to an external negative pressure pump.

[0012] As a further aspect of the present invention: an air supply drying mechanism is fixedly installed inside the housing at one end away from the roller assembly. The air supply drying mechanism includes an air supply platform, an air supply mesh is provided at the top of the air supply platform, an upper air supply component is provided above the air supply platform, and a lower air supply component is provided below the air supply platform.

[0013] As a further aspect of the present invention: the upper air supply component includes several upper air supply frames, the top of the upper air supply frame is fixedly connected to a mounting frame, the middle of the inner wall of the mounting frame is fixedly installed with an air supply fan, the bottom of the inner wall of the mounting frame is fixedly connected to an upper heater, and the bottom of the upper air supply frame is provided with an upper air supply groove, which is inclined toward the direction of the diaphragm's delivery.

[0014] As a further aspect of the present invention: the lower air supply component includes a linear guide rail, and a directional air supply unit is slidably mounted on the top of the linear guide rail. The directional air supply unit includes a movable seat, and a directional motor is fixedly mounted on the top of the movable seat. A lower air supply frame is fixedly mounted on the output end of the directional motor. A lower air supply slot is opened on the top of the lower air supply frame, and an air supply pipe is fixedly connected to the bottom of the lower air supply frame. One end of the air supply pipe is fixedly connected to the output end of an external air supply pump, and a lower heater is fixedly mounted on one side of the inner wall of the lower air supply frame.

[0015] As a further embodiment of the present invention: an adjusting guide rail is fixedly installed on one side of the lower air supply frame, a sealing plate is slidably installed on the inner wall of the adjusting guide rail, and an air collection port is opened in the middle of the sealing plate.

[0016] A method of using a lithium battery separator extraction and drying apparatus includes the following steps: Step 1: Guide and convey the diaphragm using a set of rotating rollers; Step 2: Remove the extract from the diaphragm using a detection device and detect the location of air bubbles on the diaphragm; Step 3: Use the defoaming component to vibrate and remove bubbles at their corresponding locations; Step 4: The air supply drying mechanism supplies air to the diaphragm from both the top and bottom sides, and the position of the air supply from below is changed by adjusting the air supply unit to achieve uniform drying of the diaphragm.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: The defoaming component of the present invention, by setting a vibrating cylinder that is in close contact with the diaphragm, uses vibration to assist the separation of bubbles from the diaphragm, which effectively improves the defoaming efficiency; The present invention slides the vibrating element, which can flexibly adjust the vibration position and facilitate direct vibration operation on the bubble position. Compared with the method of vibrating the entire vibrating cylinder uniformly, the present invention vibrates the specific position where the bubble is located, so that the diaphragm at the vibration position has a larger relative motion amplitude compared with other positions, thereby facilitating the escape and detachment of the bubble; This invention uses a pressing component to press the diaphragm, ensuring stable contact between it and the vibrating cylinder. A single drive motor serves as the driving source, causing the pressing component and the vibrating component to move synchronously, ensuring that their positions always correspond. This allows for targeted pressing and debubbling of air bubbles. Furthermore, the internal heating wire of the contact pad heats the location of the air bubbles, aiding in their separation. This invention uses a detection component to detect the positions of bubbles and residual liquid on the diaphragm. By using the illumination of the detection lamp and the changes in light transmittance at the positions of bubbles and residual liquid, in conjunction with a detection camera, the positions of bubbles and residual liquid can be detected and identified, so as to facilitate targeted processing by the subsequent defoaming unit and the air drying mechanism. The detection assembly of the present invention provides a slope and a guide port on the top surface of the detection frame to guide the scraped extract into the guide cavity and send it out through the guide tube; negative pressure is generated by the suction action of the negative pressure tube, and multiple extraction holes are used to extract simultaneously, thereby further realizing the effective separation of the extract remaining on the diaphragm. The air-supplying drying assembly of the present invention, through the cooperation of the upper air supply component and the lower air supply component, delivers air synchronously from both the upper and lower sides to achieve full drying of the diaphragm; the directional air supply unit is driven to move horizontally by a linear guide rail, and the lower air supply frame is driven to rotate by a directional motor and other structures to adjust the direction of the airflow delivered from below, so as to provide targeted air supply to the residual liquid position and improve the drying uniformity of the diaphragm. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the extraction and drying apparatus of the present invention; Figure 2 This is a perspective view of the internal structure of the casing of the present invention; Figure 3 This is a side cross-sectional view of the defoaming component of the present invention; Figure 4 This is a front cross-sectional view of the defoaming component of the present invention; Figure 5 This is a cross-sectional view of the driving component of the present invention; Figure 6 This is a perspective view of the detection component of the present invention; Figure 7 This is a cross-sectional view of the detection component of the present invention; Figure 8 This is a perspective view of the directional air supply unit of the present invention; Figure 9 This is a cross-sectional view of the directional air supply unit of the present invention.

[0019] Explanation of reference numerals in the attached figures: In the diagram: 101, housing; 102, pressing roller; 103, guide roller; 104, diaphragm; 2, defoaming assembly; 201, vibrating cylinder; 202, vibrating component; 2021, sliding ring; 2022, limiting block; 2023, vibrator; 203, pressing component; 2031, mounting base; 2032, pressing frame; 2033, contact pad; 2034, heating wire; 2035, limiting rod; 204, main drive screw; 205, auxiliary drive screw; 210, drive assembly; 2101, drive frame; 2102, drive gear; 2103, transmission gear; 3, detection assembly; 301, detection frame; 302, through slot; 303. 304. Air guide port; 305. Contact plate; 306. Extraction hole; 307. Divider plate; 308. Negative pressure pipe; 309. Detection light; 310. Detection camera; 4. Air supply drying mechanism; 401. Air supply table; 402. Air supply mesh; 403. Directional air supply unit; 4031. Movable seat; 4032. Directional motor; 4033. Lower air supply frame; 4034. Adjustable guide rail; 4035. Sealing plate; 4036. Lower air supply slot; 4037. Lower heater; 4038. Air supply duct; 404. Linear guide rail; 405. Upper air supply component; 4051. Upper air supply frame; 4052. Air supply fan; 4053. Upper heater. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figure 1 and Figure 2 In this embodiment of the invention, a lithium battery separator extraction and drying device includes a housing 101. Inside the housing 101, there is a set of rotating rollers for conveying a separator 104. The set of rotating rollers includes two sets of pressing rotating rollers 102 on both sides and a plurality of vertically arranged guide rotating rollers 103 between the two sets of pressing rotating rollers 102, thereby extending the conveying path of the separator 104 and facilitating the thorough drying of the separator 104. A defoaming assembly 2 is provided on the conveying path of the battery separator 104. The defoaming assembly 2 includes a vibrating cylinder 201. Please refer to [link / reference]. Figure 3 and Figure 4A vibrating element 202 is slidably mounted on the inner wall of the vibrating cylinder 201. The vibrating element 202 includes a sliding ring 2021. Several limiting blocks 2022 are fixedly connected to the outer wall of the sliding ring 2021. Several limiting grooves are opened on the inner wall of the vibrating cylinder 201. The several limiting blocks 2022 are slidably connected to the several limiting grooves. Several vibrators 2023 are fixedly mounted on the inner wall of the sliding ring 2021. The vibrators 2023 are used to generate high-frequency vibration, and their specific structure is implemented with reference to existing technical means. Compared with the existing method of simply squeezing out bubbles and excess extract by rotating rollers, this method is more efficient. This application improves defoaming efficiency by setting a vibrating cylinder 201 that is in close contact with the diaphragm 104 and using vibration to assist in the separation of bubbles from the diaphragm 104. Furthermore, by sliding the vibrating element 202, the vibration position can be flexibly adjusted, facilitating direct vibration operation at the bubble location. Compared to the method of uniform vibration throughout the vibrating cylinder 201, the vibration of the specific location of the bubble in this application results in a larger relative motion amplitude of the diaphragm 104 at the vibration location compared to other locations, thereby facilitating the escape of the bubble.

[0022] To improve the contact stability between the bubble location and the vibrating cylinder 201, a pressing member 203 for pressing the diaphragm 104 is provided on one side of the vibrating cylinder 201. The pressing member 203 includes a mounting base 2031, with a mounting hole on one side. A connecting post is slidably connected to the inner wall of the mounting hole. A return spring is fixedly connected between one end of the connecting post and the inner wall of the mounting hole, and a pressing frame 2032 is fixedly connected to the other end of the connecting post. Through the connection between the connecting post and the return spring, the pressing frame 2032 and the mounting base 2031 slide relative to each other, ensuring stable pressing contact of the pressing member 203 on the diaphragm 104. A contact pad 2033 is fixedly connected to one side of the pressing frame 2032. An electric heating wire 2034 is embedded inside the contact pad 2033, which can be activated when needed to heat the location of the bubble and assist in the separation of the bubble.

[0023] One end of the vibrating cylinder 201 is provided with a drive assembly 210 for driving the vibrating element 202 and the pressing element 203 to move synchronously. Please refer to [link / reference]. Figure 5The drive assembly 210 includes a drive frame 2101, inside which a drive motor is fixedly installed. A drive gear 2102 is fixedly connected to the output end of the drive motor. Two transmission gears 2103 are meshed on both sides of the drive gear 2102. A main transmission screw 204 and a secondary transmission screw 205 are fixedly connected to the middle of the two transmission gears 2103, respectively. The middle of the main transmission screw is threadedly connected to the middle of the sliding ring 2021. A limit rod 2035 is fixedly connected to one side of the drive frame 2101. The top of the mounting base 2031 is slidably connected to the limit rod 2035 to limit the mounting base 2031 and prevent it from rotating with the screw. The middle of the mounting base 2031 is threadedly connected to the secondary transmission screw 205. Using the same drive motor as the drive source, the pressing component 203 and the vibrating component 202 move synchronously, ensuring that the positions of the vibrating component 202 and the pressing component 203 are always corresponding, thereby realizing the pressing and debubbling of the bubble position.

[0024] Please see Figure 1 To determine the location of air bubbles, a detection component 3 is installed above the debubbling assembly 2 for detecting the diaphragm 104. Please refer to [link to relevant documentation]. Figure 6 and Figure 7 The detection component 3 includes a detection frame 301. A through groove 302 for the diaphragm 104 to pass through is provided in the middle of the detection frame 301. Two contact plates 304 are symmetrically installed on the inner wall of the detection frame 301. A detection lamp 308 is fixedly installed at the bottom of one contact plate 304, and a detection camera 309 is fixedly installed at the bottom of the other contact plate 304. By using the illumination of the detection lamp 308 and the changes in light transmittance of the bubble position and the position of excessive residual liquid in the extract, in conjunction with the detection of the detection camera 309, the bubble position and residual liquid position can be detected and identified.

[0025] A partition plate 306 is fixedly connected to one side of each of the two contact plates 304. A flow guide cavity is provided between the partition plate 306 and the inner wall of the detection frame 301. Both sides of the top of the detection frame 301 are set as inclined surfaces. A flow guide port 303 is opened in the middle of each of the two inclined surfaces. The flow guide port 303 is connected to the flow guide cavity. A flow guide pipe 310 is fixedly connected to the bottom of one side of the flow guide cavity. When the diaphragm 104 enters the detection frame 301, the extract adhering to the diaphragm 104 is separated by the scraping action of the edge of the through groove 302. By setting the inclined surface and the flow guide port 303 on the top surface of the detection frame 301, the scraped extract is guided and collected into the flow guide cavity and sent out through the flow guide pipe 310.

[0026] This application provides a negative pressure chamber between the separator plate 306 and the contact plate 304. Several extraction holes 305 are provided on the contact plate 304 at the positions corresponding to the negative pressure chamber. A negative pressure pipe 307 is fixedly connected to the bottom of one side of the negative pressure chamber. One end of the negative pressure pipe 307 is fixedly connected to an external negative pressure pump. Negative pressure is generated by the suction action of the negative pressure pipe 307, and extraction is carried out simultaneously through several extraction holes 305 to further separate the residual extract on the diaphragm 104.

[0027] Please see Figure 1 and Figure 2 An air-supplying drying mechanism 4 is fixedly installed inside the housing 101 at the end away from the roller assembly. The air-supplying drying mechanism 4 includes an air supply platform 401. An air supply mesh 402 is opened on the top of the air supply platform 401. An upper air supply component 405 is arranged above the air supply platform 401, and a lower air supply component is arranged below the air supply platform 401. Through the cooperation of the upper air supply component 405 and the lower air supply component, air is supplied simultaneously from both the upper and lower sides to achieve full drying of the diaphragm 104.

[0028] The upper air supply component 405 includes several upper air supply frames 4051. A mounting frame is fixedly connected to the top of the upper air supply frame 4051. A fan 4052 is fixedly installed in the middle of the inner wall of the mounting frame. An upper heater 4053 is fixedly connected to the bottom of the inner wall of the mounting frame. An upper air supply groove is opened at the bottom of the upper air supply frame 4051. The upper air supply groove is inclined towards the discharge direction of the diaphragm 104.

[0029] Please see Figure 1 and Figure 8 The lower air supply component includes a linear guide rail 404, and a directional air supply unit 403 is slidably mounted on the top of the linear guide rail 404. Please refer to [link / reference]. Figure 9 The directional air supply unit 403 includes a movable base 4031. A directional motor 4032 is fixedly installed on the top of the movable base 4031. A lower air supply frame 4033 is fixedly installed at the output end of the directional motor 4032. A lower air supply slot 4036 is opened on the top of the lower air supply frame 4033. An air supply pipe 4038 is fixedly connected to the bottom of the lower air supply frame 4033. One end of the air supply pipe 4038 is fixedly connected to the output end of an external air supply pump. A lower heater 4037 is fixedly installed on one side of the inner wall of the lower air supply frame 4033. The directional air supply unit 403 is driven to translate by the linear guide rail 404, and the lower air supply frame 4033 is driven to rotate by the directional motor 4032 and other structures, so as to adjust the direction of the airflow delivered from below, so as to provide targeted air supply to the residual liquid position and improve the drying uniformity of the diaphragm 104.

[0030] To improve the air delivery speed to a localized area, an adjusting guide rail 4034 is fixedly installed on one side of the lower air delivery frame 4033. A sealing plate 4035 is slidably installed on the inner wall of the adjusting guide rail 4034. An air collection port is opened in the middle of the sealing plate 4035. The sealing plate 4035 blocks part of the lower air delivery duct 4036, so that the airflow delivered by the air delivery pipe 4038 is collected and discharged through the air collection port, thereby accelerating the airflow and facilitating centralized air delivery and drying of residual liquid.

[0031] In use, the diaphragm 104 is guided and conveyed by a set of rollers. The diaphragm 104 is fed in through the feed port on one side of the housing 101, rolled by a set of pressing rollers 102, and then passes through the guide rollers 103, the detection component 3, the defoaming component 2 and another set of pressing rollers 102. After passing through the air drying mechanism 4, it is discharged from the discharge port on the other side of the housing 101. When the diaphragm 104 passes through the detection element, the extract adhering to the diaphragm 104 is separated due to the scraping action of the edge of the through groove 302. The scraped extract is guided and collected into the guide cavity by the inclined surface and guide port 303 set on the top surface of the detection frame 301, and then sent out through the guide pipe 310. When the diaphragm 104 passes the position of the detection lamp 308, the position of the bubble and the position of the residual liquid with excessive accumulation of extract are detected and identified by the illumination of the detection lamp 308 and the changes in light transmittance of the bubble position and the position of the residual liquid with excessive accumulation of extract. When the diaphragm 104 passes the position of the vibrating cylinder 201, it is started by the drive motor, which drives the transmission gear 2103, the main transmission screw 204 and the auxiliary transmission screw 205 to rotate, thereby driving the vibrating element 202 and the pressing element 203 to move to the bubble position, and the vibrator 2023 vibrates to remove bubbles from the bubble position accordingly. When the diaphragm 104 passes the position of the air-drying mechanism 4, the air-blowing fan 4052 and the external air pump are started. Air is supplied to the diaphragm 104 from the upper and lower sides through the upper air-blowing slot and the lower air-blowing pipe 4038 slot, respectively. The directional air-blowing unit 403 is moved by the linear guide rail 404, and the lower air-blowing frame 4033 is rotated by the directional motor 4032 to change the position of the lower air supply, so that the air supply position is aligned with the position of the residual liquid. In conjunction with the operation of the upper heater 4053 and the lower heater 4037, the temperature of the supplied airflow is adjusted to achieve uniform drying of the diaphragm 104.

[0032] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A lithium battery separator extraction and drying apparatus, characterized in that, The device includes a housing (101), inside which is a roller assembly for conveying a separator (104). A defoaming assembly (2) is provided on the conveying path of the battery separator (104). The defoaming assembly (2) includes a vibrating cylinder (201). A vibrating element (202) is slidably installed on the inner wall of the vibrating cylinder (201). A pressing element (203) for pressing the separator (104) is provided on one side of the vibrating cylinder (201). A driving assembly (210) for driving the vibrating element (202) and the pressing element (203) to move synchronously is provided at one end of the vibrating cylinder (201).

2. The lithium battery separator extraction and drying apparatus according to claim 1, characterized in that, The vibrating component (202) includes a sliding ring (2021), and a number of limiting blocks (2022) are fixedly connected to the outer wall of the sliding ring (2021). A number of limiting grooves are opened on the inner wall of the vibrating cylinder (201). The number of limiting blocks (2022) are slidably connected to the number of limiting grooves. A number of vibrators (2023) are fixedly installed on the inner wall of the sliding ring (2021).

3. The lithium battery separator extraction and drying apparatus according to claim 1, characterized in that, The pressing component (203) includes a mounting base (2031), a pressing frame (2032) is slidably disposed on one side of the mounting base (2031), a contact pad (2033) is fixedly connected to one side of the pressing frame (2032), and an electric heating wire (2034) is embedded inside the contact pad (2033).

4. A lithium battery separator extraction and drying apparatus according to claim 2 or 3, characterized in that, The drive assembly (210) includes a drive frame (2101), a drive motor is fixedly installed inside the drive frame (2101), a drive gear (2102) is fixedly connected to the output end of the drive motor, two transmission gears (2103) are meshed on both sides of the drive gear (2102), a main transmission screw (204) and a secondary transmission screw (205) are fixedly connected to the middle of the two transmission gears (2103), respectively; the middle of the main transmission screw is threadedly connected to the middle of the sliding ring (2021), a limit rod (2035) is fixedly connected to one side of the drive frame (2101), the top of the mounting base (2031) is slidably connected to the limit rod (2035), and the middle of the mounting base (2031) is threadedly connected to the secondary transmission screw (205).

5. The lithium battery separator extraction and drying apparatus according to claim 1, characterized in that, Above the defoaming assembly (2) is a detection assembly (3) for detecting the diaphragm (104). The detection assembly (3) includes a detection frame (301). The middle of the detection frame (301) has a through groove (302) for the diaphragm (104) to pass through. Two contact plates (304) are symmetrically installed on the inner wall of the detection frame (301). A detection lamp (308) is fixedly installed at the bottom of one of the contact plates (304), and a detection camera (309) is fixedly installed at the bottom of the other contact plate (304).

6. The lithium battery separator extraction and drying apparatus according to claim 5, characterized in that, A partition plate (306) is fixedly connected to one side of each of the two contact plates (304). A flow guide cavity is provided between the partition plate (306) and the inner wall of the detection frame (301). Both sides of the top of the detection frame (301) are set as inclined surfaces. A flow guide port (303) is opened in the middle of each of the two inclined surfaces. The flow guide port (303) is connected to the flow guide cavity. A flow guide pipe (310) is fixedly connected to the bottom of one side of the flow guide cavity.

7. The lithium battery separator extraction and drying apparatus according to claim 5, characterized in that, A negative pressure cavity is provided between the partition plate (306) and the contact plate (304). Several extraction holes (305) are opened on the contact plate (304) corresponding to the position of the negative pressure cavity. A negative pressure pipe (307) is fixedly connected to the bottom of one side of the negative pressure cavity.

8. The lithium battery separator extraction and drying apparatus according to claim 1, characterized in that, An air supply drying mechanism (4) is fixedly installed inside the housing (101) at one end away from the roller assembly. The air supply drying mechanism (4) includes an air supply platform (401), an air supply mesh (402) is opened on the top of the air supply platform (401), an upper air supply component (405) is provided above the air supply platform (401), and a lower air supply component is provided below the air supply platform (401).

9. The lithium battery separator extraction and drying apparatus according to claim 8, characterized in that, The lower air supply component includes a linear guide rail (404), and a directional air supply unit (403) is slidably installed on the top of the linear guide rail (404). The directional air supply unit (403) includes a movable seat (4031), and a directional motor (4032) is fixedly installed on the top of the movable seat (4031). A lower air supply frame (4033) is fixedly installed at the output end of the directional motor (4032). A lower air supply slot (4036) is opened on the top of the lower air supply frame (4033). An air supply pipe (4038) is fixedly connected to the bottom of the lower air supply frame (4033). A lower heater (4037) is fixedly installed on one side of the inner wall of the lower air supply frame (4033).

10. A method of using a lithium battery separator extraction and drying apparatus according to any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Guide and convey the diaphragm (104) using a set of rotating rollers; Step 2: Remove the extract from the diaphragm (104) using a detection device and detect the position of the air bubbles on the diaphragm (104); Step 3: De-bubbling is performed at the bubble positions using the de-bubbling component (2); Step 4: The air supply drying mechanism (4) supplies air to the diaphragm (104) from both the upper and lower sides, and the air supply position below is changed by the air supply unit (403) to achieve uniform drying of the diaphragm (104).

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