Battery diaphragm coating equipment

Abstract

The invention relates to the technical field of diaphragm coating, in particular to battery diaphragm coating equipment, and solves the technical problems of tedious replacement, low efficiency and poor coating precision caused by non-adjustable or inconvenient adjustment of the width of a coating opening of the existing battery diaphragm coating equipment. The material storage box is provided with a conveying pipe communicated with the inner cavity, the conveying pipe is used for conveying coating slurry into the inner cavity, one end of the inner cavity is provided with a coating opening communicated with the inner cavity, the coating opening is used for discharging the coating slurry, and the two sides of the interior of the inner cavity are provided with baffles matched with the inner cavity; the baffle is in sliding fit with the inner cavity, and the position of the baffle is adjusted by driving the baffle to slide along the inner cavity. And a lead screw is installed on the material storage box and connected with the baffles, and the distance between the baffles on the two sides in the inner cavity is adjusted by rotating the lead screw, so that the width of the coating slurry discharged from the coating opening is adjusted.

Description

Technical Field

[0001] This invention relates to the field of separator coating technology, specifically to a battery separator coating device. Background Technology

[0002] The battery separator is one of the core components of a lithium-ion battery, and its performance directly determines the battery's safety, cycle stability, and energy density. During battery operation, the separator must effectively prevent direct contact between the positive and negative electrodes to avoid internal short circuits, while providing a pathway for lithium-ion migration. To further improve the separator's high-temperature resistance, puncture resistance, electrolyte wettability, and thermal stability, and to prevent safety issues such as thermal runaway caused by separator shrinkage, damage, or lithium dendrite puncture during charging and discharging, the industry commonly uses coating processes to coat the separator surface with functional slurries such as ceramic coatings and polymer coatings. By forming a uniform functional layer through coating, it achieves enhanced insulation protection, improved structural strength, and optimized interface compatibility, thereby improving the overall battery performance and lifespan.

[0003] In existing battery separator coating equipment, the mainstream coating methods mainly include slit coating and nozzle coating. Slit coating equipment has a fixed coating port structure; its width is fixed after the equipment leaves the factory and cannot be adjusted. In actual production, when coating separators of different widths is required, or when adjusting the coating area width of the separator surface according to product process requirements, because the coating port width is unchangeable, the original coating device must be disassembled and replaced with a coating port component that matches the corresponding coating width. Then, it must be reinstalled, debugged, and calibrated. This replacement process is complex, requiring significant manpower and time, causing production line interruptions, reducing overall production efficiency, and increasing the risk of equipment wear and failure due to frequent component replacements.

[0004] For equipment using nozzle-based coating, although theoretically the coating width can be changed by adjusting the nozzle arrangement or the slurry output range of a single nozzle, existing nozzle adjustment mechanisms are mostly manual or simple mechanical adjustments. The adjustment process is cumbersome, and the precision is difficult to control accurately, easily leading to problems such as coating width deviation, uneven edge coating, slurry accumulation, or missed coating. At the same time, the coordinated adjustment of nozzle spacing and slurry output is difficult, making it impossible to quickly adapt to the coating requirements of different specifications. Moreover, multiple trial coatings and calibrations are required after adjustment, affecting production continuity and product quality stability, making it difficult to meet the diverse, high-precision, and high-efficiency production requirements of the lithium battery industry for separator coating. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a battery separator coating device that solves the technical problems of existing battery separator coating devices, which suffer from cumbersome replacement, low efficiency, and poor coating accuracy due to the inability or inconvenience of adjusting the coating port width.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a battery separator coating device, comprising a storage box, wherein the storage box has an inner cavity, and a conveying pipe connected to the inner cavity is installed on the storage box for conveying coating slurry into the inner cavity. One end of the inner cavity has a coating port connected to the inner cavity for discharging the coating slurry. Two baffles matching the inner cavity are installed on both sides of the inner cavity, and the baffles slide within the inner cavity. The position of the baffles is adjusted by driving them to slide along the inner cavity. A lead screw is installed on the storage box, and the lead screw is connected to the baffles. By rotating the lead screw, the distance between the two baffles inside the inner cavity is adjusted, thereby adjusting the width of the coating slurry discharged from the coating port.

[0007] Furthermore, the inner cavity includes a storage cavity and a flow cavity that are interconnected, with the bottom of the storage cavity being lower than the bottom of the flow cavity; the coating slurry first enters the storage cavity of the inner cavity through the conveying pipe, then flows through the flow cavity, and finally exits from the coating port.

[0008] Furthermore, the baffle includes a first blocking part that matches the storage cavity and a second blocking part that matches the flow cavity.

[0009] Furthermore, there are two lead screws, which are respectively installed on both sides of the storage box; mounting parts are installed on both sides of the storage box, the lead screws are threadedly connected to the mounting parts, and the lead screws are rotatably connected to the baffle.

[0010] Furthermore, it also includes a support roller disposed opposite to the coating port, the support roller being used to support the diaphragm passing through the coating port; the distance between the support roller and the coating port is adjustable to accommodate diaphragms of different thicknesses for coating operations.

[0011] Furthermore, it also includes several guide rollers, through which the diaphragm passes, and the guide rollers guide the conveying direction of the diaphragm.

[0012] Furthermore, it also includes brackets for mounting storage boxes, support rollers, and guide rollers.

[0013] Furthermore, the support roller is slidably connected to the bracket, and the distance between the support roller and the coating port is adjusted by sliding the support roller; a mounting frame is installed on the support roller, and the support roller is rotatably connected to the mounting frame; a slide rail is installed on the bracket, and the mounting frame is slidably connected to the slide rail to realize the sliding connection between the support roller and the bracket; a mounting plate is fixedly installed on the bracket, and a threaded rod is threadedly connected to the mounting plate, the end of the threaded rod is rotatably connected to the mounting frame, and the distance between the support roller and the coating port is adjusted by rotating the threaded rod.

[0014] Furthermore, the storage box is equipped with a top shaft and a spring that provides elastic force for the top shaft to move toward the support roller. The elastic force of the spring causes the top shaft to move toward the support roller, and the top shaft abuts against the support roller to press the diaphragm passing over the support roller.

[0015] Furthermore, a connecting frame is installed on the storage box, and a support rod is installed on the connecting frame. The support rod is slidably connected to the connecting frame, and the top shaft is rotatably mounted on the support rod. A fixing block is fixedly installed on the outer wall of the support rod, and a fixing plate is fixedly connected to the bottom of the connecting frame. The support rod is slidably connected to the fixing plate, and a spring is installed between the fixing plate and the fixing block. The spring force acts between the fixing plate and the fixing block, causing the top shaft to move towards the support roller. The support rod passes through the fixing plate, and a handle is provided at the tail of the support rod. A second slide is fixedly installed on the storage box, and the connecting frame is slidably engaged with the second slide. The position of the connecting frame can be adjusted by sliding the connecting frame along the second slide. A set screw is threadedly connected to the connecting frame, and the screwed-in end of the set screw can abut against the second slide to fix the position of the connecting frame.

[0016] Compared with the prior art, the present invention provides a battery separator coating device, which has the following beneficial effects: This battery separator coating equipment features baffles on both sides of the inner cavity that slide smoothly along the inner wall, creating an adjustable slurry flow channel. The width of the slurry discharged from the coating port is adjusted by changing the baffle position. Simultaneously, a lead screw is installed on the storage box, connecting to the baffles. The screw's threaded transmission characteristic drives the baffle movement, achieving precise adjustment of the distance between the two baffles. Compared to existing technologies, this structure eliminates the need to replace storage boxes or coating devices with different coating port sizes. The coating width can be adjusted simply by rotating the lead screw, making operation simple and quick, significantly reducing equipment changeover time and improving production efficiency. Furthermore, the lead screw threaded transmission offers advantages such as smooth transmission and high precision, accurately controlling the baffle position, effectively avoiding coating deviations, improving separator coating quality, and eliminating the need to replace the coating device, thus increasing efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the first three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the first three-dimensional structure of the present invention; Figure 3 This is a side view of the structure of the present invention; Figure 4 This is a three-dimensional structural diagram of the storage box of the present invention; Figure 5 This is a three-dimensional structural diagram of the storage box of the present invention, wherein the baffle is detached from the interior of the cavity; Figure 6 This is a top sectional view of the storage box of the present invention; Figure 7 This is a side sectional view of the storage box of the present invention; Figure 8 This is a side sectional view of the storage box of the present invention, wherein a support roller is installed opposite to the coating port; Figure 9 This is a schematic diagram of the structure of the baffle of the present invention; Figure 10 This is a side sectional view of the connecting frame of the present invention; Figure 11 This is a three-dimensional structural diagram of the storage box of the present invention with a top cover, wherein the top cover is in a closed state; Figure 12 This is a three-dimensional structural diagram of the storage box of the present invention having a top cover, wherein the top cover is in an open state; Figure 13 This is a three-dimensional structural diagram of the mounting frame and support roller of the present invention; Figure 14 This is a top view of the mounting frame and support rollers of the present invention. Figure 15 For the present invention Figure 3 A partially enlarged structural diagram of point A shown in the image; Figure 16 For the present invention Figure 5 A partially enlarged structural diagram of point B shown in the image; Figure 17 For the present invention Figure 8 A partially enlarged structural diagram of point C shown in the image; Figure 18 For the present invention Figure 11 The diagram shows a partially enlarged structural schematic at point D.

[0018] In the diagram: 1. Storage box; 2. Inner cavity; 3. Coating port; 4. Baffle; 5. Lead screw; 6. Conveying pipe; 7. Mounting component; 8. Diaphragm; 9. Support roller; 10. Guide roller; 11. Bracket; 12. Mounting frame; 13. Slide rail one; 14. Mounting plate; 15. Threaded rod; 16. Top shaft; 17. Spring; 18. Connecting frame; 19. Support rod; 20. Fixing block; 21. Fixing plate; 22. Handle; 23. Slide rail two; 24. Top screw; 25. Conveying pump; 26. Scale; 27. Top cover; 28. Bolt; 29. ​​Sealing gasket; 201. Storage cavity; 202. Flow cavity; 401. Blocking part one; 402. Blocking part two. Detailed Implementation

[0019] 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.

[0020] Please see Figure 3-9 This invention discloses a battery separator coating apparatus, comprising a storage box 1, with an inner cavity 2 for containing and guiding coating slurry. A delivery pipe 6, communicating with the inner cavity 2, is disposed through the side wall of the storage box 1. One end of the delivery pipe 6 extends to the outside of the storage box 1 and is connected to a delivery pump 25. The delivery pump, as the power source for slurry delivery, draws coating slurry from an external container used for storing coating slurry during operation and continuously and stably delivers it to the inner cavity 2 of the storage box 1 through the delivery pipe 6, providing a sufficient and continuous supply of slurry for subsequent coating operations.

[0021] A coating port 3 is provided on one side of the inner cavity 2, which is connected to the inner cavity 2. The coating port 3 forms a channel for the slurry to flow out, and its discharge direction corresponds to the battery separator 8 to be coated. It is used to uniformly discharge the coating slurry in the inner cavity 2 so as to coat the surface of the battery separator 8 and form the required coating layer on the surface of the separator 8.

[0022] Baffles 4, matching the inner cavity 2, are installed on both sides of the inner cavity 2. The baffles 4 are integrally matched with the cross-section of the inner cavity 2, allowing them to be placed inside the inner cavity 2 and forming a sliding fit with the inner wall of the inner cavity 2. To improve the sealing effect of the baffles 4, sealing gaskets, sealing elements, or sealing strips can be installed on the outer wall of the baffles 4. This sealing structure fits tightly against the inner wall of the inner cavity 2, effectively sealing the gap between the baffles 4 and the wall of the inner cavity 2, preventing the coating slurry from leaking from the connection between the baffles 4 and the inner cavity 2 to the outside of the storage box 1, thus ensuring the airtightness between the inner cavity 2 and the baffles 4.

[0023] The baffle 4 can slide along the length of the inner cavity 2 inside the cavity 2. By adjusting the lateral position of the baffle 4 within the inner cavity 2, the relative distance between the two baffles 4 can be changed. This change in distance directly adjusts the effective discharge width of the coating port 3, thereby adjusting the width of the slurry discharged from the coating port 3. In this way, the coating area can be flexibly adjusted according to the width requirements of different specifications of battery separators 8, and it can adapt to the coating operations of various models of separators 8.

[0024] The storage box 1 is equipped with a lead screw 5 for adjusting the position of the baffle 4. The lead screw 5 is connected to the baffle 4. By rotating the lead screw 5, the baffle 4 can be moved, thereby adjusting the distance between the two baffles 4. Due to the thread transmission characteristics of the lead screw 5, the width of the coating slurry discharged from the coating port 3 can be precisely adjusted.

[0025] In this patent application, the lead screw 5 is configured in two preferred ways. In the first method, as shown... Figure 4-6 As shown, two lead screws 5 are configured and installed on both sides of the storage box 1. Mounting parts 7 are fixedly installed on the outer walls of both sides of the storage box 1. The lead screws 5 are connected to the mounting parts 7 via a threaded connection. One end of the lead screw 5 extends into the inner cavity 2 and forms a rotatable connection with the corresponding side baffle 4. By rotating the lead screws 5 on both sides respectively, the position of the corresponding baffle 4 in the inner cavity 2 can be adjusted independently, thereby precisely adjusting the distance between the two side baffles 4 and completing the precise adjustment of the discharge width of the coating port 3.

[0026] In the second scheme, a single lead screw 5 is used, which is rotatably connected to the mounting part 7 on the storage box 1. The lead screw 5 passes through the baffles 4 on both sides and is threadedly connected. The lead screw 5 is a bidirectional lead screw 5, with the threads on both sides rotating in opposite directions. When rotating a single lead screw 5, because the threads on both sides rotate in opposite directions, the baffles 4 on both sides can be driven to move in opposite directions or away from each other along the axis of the lead screw 5, thereby quickly adjusting the distance between the baffles 4 on both sides and achieving precise adjustment of the discharge width of the coating port 3.

[0027] like Figure 7-9 As shown, the inner cavity 2 includes a storage cavity 201 and a flow cavity 202 that are interconnected, and the bottom end of the storage cavity 201 is lower than the bottom end of the flow cavity 202. The coating slurry first enters the storage cavity of the inner cavity 2 through the delivery pipe 6. Under the action of gravity, the coating slurry in the storage cavity 201 is first filled. When the slurry level in the storage cavity 201 gradually rises to be level with the flow cavity 202, it then flows naturally and smoothly into the flow cavity 202, and is finally discharged evenly through the coating port 3 connected to one end of the flow cavity 202.

[0028] The bottom of the storage chamber 201 is set lower than the bottom of the flow chamber 202 to achieve uniform slurry flow using gravity. If one or more delivery pipes 6 are directly connected to a single inner cavity 2, the slurry will be concentrated at the outlet of the delivery pipe 6. Due to deviations in slurry flow rate, pressure, and position, the slurry concentration and liquid level in the area near the delivery pipe 6 may be too high, while the slurry supply in the area far from the delivery pipe 6 may be insufficient. This will result in uneven slurry distribution in subsequent coating processes, affecting the coating quality.

[0029] This invention adds a storage chamber 201 as a slurry buffer and homogenization area, allowing the slurry injected through the delivery pipe 6 to spread evenly horizontally within the storage chamber 201. As the slurry is continuously injected, the liquid level in the storage chamber 201 rises steadily under gravity until the coating slurry flows evenly into the flow chamber 202. The storage chamber 201 effectively eliminates localized concentration and flow rate differences caused by the injection through the delivery pipe 6, resulting in a uniform overall distribution and consistent liquid level of the slurry flowing into the flow chamber 201. The flow chamber 201, as a narrow channel directly adapted to the coating port 3, further guides the slurry flow, ensuring a uniform distribution and stable flow rate of the final coating slurry discharged from the coating port 3, significantly improving the uniformity of the coating layer on the surface of the battery separator 8.

[0030] like Figure 9 As shown, the baffle 4 specifically includes a first blocking part 401 that matches the cross-section of the storage cavity 201, and a second blocking part 402 that matches the cross-section of the flow cavity 202. The cross-sectional shape of the first blocking part 401 is adapted to the internal contour of the storage cavity 201, so that it can be stably placed inside the storage cavity 201 and form a sliding fit with the inner wall of the storage cavity 201; similarly, the cross-sectional shape of the second blocking part 402 is adapted to the internal contour of the flow cavity 202, so that it can be stably located inside the flow cavity 202 and form a sliding fit with the inner wall of the flow cavity 202.

[0031] Through the above structural design, the baffle 4 can effectively block both sides of the storage chamber 201 and the flow chamber 202 simultaneously. When the baffle 4 slides along the inner cavity 2 to adjust its position, the first blocking part 401 cooperates with the storage chamber 201, and the second blocking part 402 cooperates with the flow chamber 202. This can simultaneously block and guide the channels on both sides of the two chambers, thereby precisely controlling the effective width of the slurry flowing from the storage chamber 201 to the flow chamber 201, and ultimately achieving the adjustment of the width of the slurry discharged from the coating port 3.

[0032] like Figure 1-3 As shown in Figures 13-15, the present invention also includes a support roller 9 disposed opposite to the coating port 3. The support roller 9 supports the diaphragm 8 passing through the coating port 3, ensuring that the diaphragm 8 is stably conveyed while adhering tightly to the support roller 9. The distance between the support roller 9 and the coating port 3 is adjustable to accommodate coating operations of diaphragms 8 of different thicknesses. The main function of the support roller 9 is to maintain a certain distance between the diaphragm 8 and the coating port 3, or to ensure that the diaphragm 8 is tightly adhering to the coating port 3, thus ensuring the stability of the diaphragm 8 during the coating process. For diaphragms 8 of different thicknesses, by adjusting the distance between the support roller 9 and the coating port 3, it can be ensured that the coating slurry is uniformly adhered to the surface of diaphragms 8 of different thicknesses.

[0033] like Figure 1-3As shown, the present invention also includes several guide rollers 10, which are capable of free rotation. The diaphragm 8 passes through the guide rollers 10 during transport. The guide rollers 10 rotate along with the transport of the diaphragm 8, providing stable guidance for the transport direction of the diaphragm 8, ensuring smooth transport along a preset path and preventing problems such as offset or wrinkles during transport. The equipment also includes a take-up shaft and an unwind shaft. The unwind shaft releases the diaphragm 8 to be coated, and the take-up shaft winds up the diaphragm 8 after coating. Through the coordinated rotation of the unwind and take-up shafts, continuous unwinding, transport, and winding of the diaphragm 8 are achieved.

[0034] like Figure 1-3 As shown, the present invention also includes a bracket 11, which is used to install components such as the storage box 1, support roller 9, guide roller 10, take-up shaft, and unwind shaft, providing a stable installation foundation and support for each component. The bracket 11 can be an integrated structure or can be set separately according to installation requirements. Through the integrated or split structural design, reliable fixing and positioning of components such as the storage box 1, support roller 9, and guide roller 10 can be achieved, ensuring the stability of each component's position during equipment operation.

[0035] like Figure 13-15 As shown, the support roller 9 is slidably connected to the bracket 11, and the distance between the support roller 9 and the coating port 3 can be adjusted by sliding the support roller 9. A mounting frame 12 is installed on the support roller 9, and the support roller 9 is rotatably connected to the mounting frame 12, so that the support roller 9 can rotate freely and rotate synchronously with the diaphragm 8 during the diaphragm 8 conveying process, reducing the friction between the diaphragm 8 and the support roller 9 and ensuring smooth conveying of the diaphragm 8.

[0036] A slide rail 13 is mounted on the bracket 11, and the mounting frame 12 is slidably connected to the slide rail 13, thereby achieving a sliding fit between the support roller 9 and the bracket 11. A mounting plate 14 is also fixedly mounted on the bracket 11, and a threaded rod 15 is threadedly connected to the mounting plate 14. The end of the threaded rod 15 is rotatably connected to the mounting frame 12. By rotating the threaded rod 15, the mounting frame 12 is moved along the slide rail 13 via threaded transmission, which in turn drives the support roller 9 to move synchronously, achieving precise adjustment of the distance between the support roller 9 and the coating port 3. The threaded transmission structure of the threaded rod 15 is stable and has high adjustment accuracy, allowing for precise control of the distance between the support roller 9 and the coating port 3 based on the thickness of the diaphragm 8 and coating process requirements.

[0037] like Figure 5 , 7As shown in -8, 10 and 16-17, a top shaft 16 and a spring 17 are installed on the storage box 1 to provide elastic force to the top shaft 16 toward the support roller 9. The spring 17 can be a compression spring or a tension spring. The spring 17 moves the top shaft 16 toward the support roller 9 by its own elastic force. The top shaft 16 abuts against the support roller 9 to press the diaphragm 8 passing on the support roller 9, so that the diaphragm 8 is further flattened and laid flat, and fits more closely to the surface of the support roller 9, thereby improving the flatness and stability of the diaphragm 8 during the coating process.

[0038] The specific installation method is as follows: a connecting frame 18 is installed on the storage box 1, and a support rod 19 is installed on the connecting frame 18. The support rod 19 is slidably connected to the connecting frame 18. The sliding connection can be achieved by the support rod 19 directly passing through the connecting frame 18, allowing the support rod 19 to slide stably along its own axis. The top shaft 16 is rotatably installed on the support rod 19, and the axis of the top shaft 16 is parallel to the axis of the support roller 9, ensuring that the top shaft 16 can act evenly on the surface of the diaphragm 8.

[0039] A fixing block 20 is fixedly installed on the outer wall of the support rod 19, and a fixing plate 21 is fixedly connected to the bottom of the connecting frame 18. The support rod 19 is slidably connected to the fixing plate 21, and the support rod 19 can slide through the fixing plate 21 to ensure the stability of the sliding of the support rod 19. A spring 17 is installed between the fixing block 20 and the fixing plate 21. When a compression spring is used, the compression spring is in a compressed state, and its outward elastic force acts between the fixing plate 21 and the fixing block 20. When a tension spring is used, the two ends of the tension spring are fixedly connected to the connecting frame 18 and the fixing block 20 respectively, and the tension of the tension spring acts between the fixing block 20 and the connecting frame 18. Both forms can make the top shaft 16 move towards the support roller 9. The support rod 19 passes through the fixing plate 21, and a handle 22 is provided at the tail of the support rod 19 for easy manual operation of the support rod 19 to move the top shaft 16 away from the support roller 9.

[0040] A second slide rail 23 is fixedly installed on the storage box 1. The connecting frame 18 is slidably engaged with the second slide rail 23. By sliding the connecting frame 18 along the second slide rail 23, the overall position of the connecting frame 18 can be adjusted, thereby adjusting the position of the top shaft 16. A set screw 24 is threadedly connected to the connecting frame 18. The screw-in end of the set screw 24 can abut against the second slide rail 23. Tightening the set screw 24 can fix the position of the connecting frame 18, ensuring the stability of the position of the top shaft 16 after adjustment.

[0041] The storage box 1 can be a one-piece molded structure, which has high structural strength and good sealing performance, effectively preventing leakage of the coating slurry. Other configurations of the storage box 1 include... Figure 11-12As shown in Figure 18, the storage box 11 can be configured with a top cover 27, which is hinged to the storage box 1. The top cover 27 can be hinged to the storage box 1 via hinges, pivots, or other devices, allowing the top cover 27 to be folded open and closed. The top cover 27 is connected and fixed to the storage box 1 by bolts 28. When it is necessary to clean the inner cavity 2, the bolts 28 can be loosened to open the top cover 27, fully exposing the inner cavity 2. This facilitates the cleaning and maintenance of components such as the storage cavity 201, the flow cavity 202, and the baffle 4 by the operator, removing residual coating slurry or impurities. After cleaning, the top cover 27 is reset and the bolts 28 are tightened to restore the original structure of the inner cavity 2 of the storage box 1, ensuring the airtightness of the inner cavity 2.

[0042] Based on the top cover 27 of the aforementioned storage box 1, a sealing gasket 29 is installed at the contact position between the storage box 1 and the top cover 27 to further improve the sealing performance of the storage box 1. The sealing gasket 29 is tightly fitted to the end face of the top of the storage box 1. When the top cover 27 is reset and tightened by bolts 28, the top cover 27 will press the sealing gasket 29, causing the sealing gasket 29 to undergo elastic deformation, thereby filling the gap between the storage box 1 and the top cover 27, effectively preventing the coating slurry from leaking from the gap and ensuring the sealing performance of the inner cavity 2.

[0043] To facilitate precise adjustments by staff, it should be further explained that, for example... Figure 5 As shown, the material storage box 1 has a scale 26 at the position of the coating port 3 along the length of the coating port 3. At the same time, the bracket 11 also has a scale 26 on the side of the slide 13.

[0044] The setting of the above-mentioned scale 26 provides an intuitive reference for adjustment operations. When the operator drives the baffle 4 to move by the lead screw 5 to adjust the distance between the two baffles 4 and thus determine the effective discharge width of the coating port 3, they can directly refer to the scale 26 on the storage box 1 to achieve precise setting of the coating width.

[0045] Similarly, when the mounting bracket 12 is driven to slide along the slide rail 13 by the threaded rod 15 to adjust the distance between the support roller 9 and the coating port 3, the scale 26 near the slide rail 13 on the support bracket can be referenced to precisely control the displacement distance of the support roller 9.

[0046] In summary, during operation, the battery separator coating equipment first passes the separator 8 on the unwinding shaft through the support roller 9 and guide roller 10. Then, the separator 8 is connected to the take-up shaft, and the unwinding shaft releases the separator 8 film to be coated. The separator 8 film is continuously conveyed along the path of the support roller 9 and guide roller 10. During the conveying process, the support roller 9 and guide roller 10 provide support and guidance for the separator 8 film.

[0047] After the diaphragm 8 is installed, according to the thickness specifications of the diaphragm 8 to be coated, the operator rotates the threaded rod 15 to drive the mounting frame 12 to slide along the slide rail 13, thereby moving the support roller 9 closer to or away from the coating port 3. By observing the scale 26 on the side of the slide rail 13, the distance between the support roller 9 and the coating port 3 is precisely adjusted so that the diaphragm 8 film can be tightly attached to the surface of the coating port 3, or maintain a certain distance from the coating port 3.

[0048] When installing the diaphragm 8, the operator can hold the handle 22 at the end of the support rod 19 and drive the support rod 19 to move along its axis. This causes the support rod 19 to move the top shaft 16 away from the support roller 9, increasing the distance between the top shaft 16 and the support roller 9, providing sufficient operating space for the diaphragm 8 to be threaded through. After the diaphragm 8 is successfully installed and supported on the surface of the support roller 9, the handle 22 is released. Under the elastic force of the spring 17, the fixing block 20 drives the support rod 19 to move closer to the support roller 9, causing the top shaft 16 to abut against the diaphragm 8 on the support roller 9. This effectively presses the diaphragm 8, making it further flat and adhered to the surface of the support roller 9, ensuring the tension and flatness of the film during transport.

[0049] After the position of the diaphragm 8 and the spacing between the support roller 9 are adjusted, the lead screws 5 on both sides of the storage box 1 are rotated according to the required coating width, driving the baffle 4 to slide along the inner cavity 2, thus changing the spacing between the two baffles 4. By observing the scale 26 at the coating port 3 of the storage box 1, the effective discharge width of the coating port 3 can be precisely adjusted.

[0050] After the coating width is adjusted, the delivery pump 25 and the take-up shaft are started. The delivery pump 25 draws the coating slurry from the external slurry container and delivers it to the inner cavity 2 of the storage box 1 through the delivery pipe 6. The coating slurry first enters the storage cavity 201 of the inner cavity 2 and spreads evenly in the horizontal direction under the action of gravity, and the liquid level gradually rises. When the slurry level in the storage cavity 201 rises to be level with the flow cavity 202, the slurry flows naturally and smoothly into the flow cavity 202, and then the slurry is evenly discharged from the coating port 3 through the flow cavity 202.

[0051] As the separator 8 is continuously conveyed under the winding drive of the winding shaft, the coating slurry discharged from the coating port 3 is evenly coated on the surface of the separator 8 film after passing through the support roller 9, completing the coating process of the battery separator 8. Throughout the coating process, the synergistic action of the support roller 9 and the top shaft 16 ensures that the separator 8 film remains in a flat and stable state.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A battery separator coating apparatus, comprising a storage box (1), wherein the storage box (1) has an inner cavity (2) therein, and a conveying pipe (6) connected to the inner cavity (2) is installed on the storage box (1), the conveying pipe (6) being used to convey coating slurry into the inner cavity (2), characterized in that: One end of the inner cavity (2) is provided with a coating port (3) that communicates with the inner cavity (2). The coating port (3) is used to discharge the coating slurry. The two sides inside the inner cavity (2) are equipped with baffles (4) that match the inner cavity (2). The baffles (4) slide with the inner cavity (2). The position is adjusted by driving the baffles (4) to slide along the inner cavity (2). A screw (5) is installed on the storage box (1). The screw (5) is connected to the baffles (4). By rotating the screw (5), the distance between the baffles (4) on both sides inside the inner cavity (2) is adjusted, thereby adjusting the width of the coating slurry discharged from the coating port (3).

2. The battery separator coating equipment according to claim 1, characterized in that: The inner cavity (2) includes a storage cavity (201) and a flow cavity (202) that are connected to each other. The bottom end of the storage cavity (201) is lower than the bottom end of the flow cavity (202). The coating slurry first enters the storage cavity (201) of the inner cavity (2) through the conveying pipe (6), then flows through the flow cavity (202), and finally is discharged from the coating port (3).

3. The battery separator coating equipment according to claim 2, characterized in that: The baffle (4) includes a first blocking part (401) that matches the storage cavity (201) and a second blocking part (402) that matches the flow cavity (202).

4. The battery separator coating apparatus according to any one of claims 1-3, characterized in that: Two lead screws (5) are provided and installed on both sides of the storage box (1); mounting parts (7) are installed on both sides of the storage box (1), the lead screw (5) is threadedly connected to the mounting parts (7), and the lead screw (5) is rotatably connected to the baffle (4).

5. The battery separator coating equipment according to claim 1, characterized in that: It also includes a support roller (9) disposed opposite to the coating port (3), the support roller (9) being used to support the diaphragm (8) passing through the coating port (3); the distance between the support roller (9) and the coating port (3) is adjustable to accommodate diaphragms (8) of different thicknesses for coating operations.

6. The battery separator coating equipment according to claim 5, characterized in that: It also includes several guide rollers (10), through which the diaphragm (8) passes, and the guide rollers (10) guide the conveying direction of the diaphragm (8).

7. The battery separator coating equipment according to claim 6, characterized in that: It also includes a bracket (11) for mounting the storage box (1), support roller (9) and guide roller (10).

8. The battery separator coating equipment according to claim 7, characterized in that: The support roller (9) is slidably connected to the bracket (11), and the distance between the support roller (9) and the coating port (3) is adjusted by sliding the support roller (9); a mounting frame (12) is installed on the support roller (9), and the support roller (9) is rotatably connected to the mounting frame (12); a slide rail (13) is installed on the bracket (11), and the mounting frame (12) is slidably connected to the slide rail (13) to realize the sliding connection between the support roller (9) and the bracket (11); a mounting plate (14) is fixedly installed on the bracket (11), and a threaded rod (15) is threadedly connected to the mounting plate (14), and the end of the threaded rod (15) is rotatably connected to the mounting frame (12), and the distance between the support roller (9) and the coating port (3) is adjusted by rotating the threaded rod (15).

9. The battery separator coating apparatus according to any one of claims 5-8, characterized in that: The storage box (1) is equipped with a top shaft (16) and a spring (17) that provides elastic force for the top shaft (16) to move toward the support roller (9). The elastic force of the spring (17) causes the top shaft (16) to move toward the support roller (9). The top shaft (16) abuts against the support roller (9) to press the diaphragm (8) passing over the support roller (9).

10. The battery separator coating equipment according to claim 9, characterized in that: A connecting frame (18) is installed on the storage box (1), and a support rod (19) is installed on the connecting frame (18). The support rod (19) is slidably connected to the connecting frame (18), and the top shaft (16) is rotatably installed on the support rod (19). A fixing block (20) is fixedly installed on the outer wall of the support rod (19), and a fixing plate (21) is fixedly connected to the bottom of the connecting frame (18). The support rod (19) is slidably connected to the fixing plate (21), and a spring (17) is installed between the fixing plate (21) and the fixing block (20). The elastic force of the spring (17) acts on the fixing plate (21) and the fixing block. Between (20), the top shaft (16) moves toward the support roller (9); the support rod (19) passes through the fixed plate (21), and the tail of the support rod (19) is provided with a handle (22); a slide rail (23) is fixedly provided on the storage box (1), the connecting frame (18) slides with the slide rail (23), the position of the connecting frame (18) is adjusted by sliding the connecting frame (18) along the slide rail (23), the connecting frame (18) is connected to the top screw (24) by thread, the screw end of the top screw (24) can abut against the slide rail (23) to fix the position of the connecting frame (18).

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