Battery diaphragm liquid removal equipment and battery diaphragm production system

Abstract

The utility model belongs to the technical field of battery diaphragm production equipment, and discloses battery diaphragm liquid removal equipment and a battery diaphragm production system. The battery diaphragm liquid removal equipment comprises a first liquid removal device, a second liquid removal device and at least one first traction roller. The first traction roller extrudes the first face of the diaphragm. The first liquid removing device is located at the rear ends of all the first traction rollers in the diaphragm moving direction and comprises a second traction roller and an air blowing mechanism, the second traction roller abuts against the second face of the diaphragm, and the air blowing mechanism is correspondingly arranged on one side of the second traction roller and used for blowing off liquid on the surface of the diaphragm. The second liquid removing device is located at the rear end of the first liquid removing device in the moving direction of the diaphragm, the second liquid removing device comprises two liquid absorbing rollers, the two liquid absorbing rollers are located on the two sides of the diaphragm respectively, and the liquid absorbing rollers can absorb liquid on the surface of the diaphragm. The battery diaphragm liquid removal equipment can reduce liquid residues on the surface of the diaphragm, realizes uniform liquid removal, and has a good liquid removal effect.

Description

Technical Field

[0001] The utility model relates to the technical field of battery diaphragm production equipment, in particular to battery diaphragm liquid removal equipment and a battery diaphragm production system. Background Art

[0002] The extraction and washing process is one of the common processes in the production process of battery diaphragms. For example, in the process of wet battery diaphragm extraction, the diaphragm needs to be immersed in a de-liquidation tank containing an extractant (dichloromethane liquid) to extract the pore-forming agent on the diaphragm. The de-liquidation tank contains a large amount of extractant. After the diaphragm is separated from the surface of the extractant, a large amount of extractant will remain on the surface. There is also a washing process in the production process of coated battery diaphragms, which also has the same problems as the above process.

[0003] At present, a scraper is mostly used to scrape the diaphragm, but the liquid removal effect is not ideal. There may still be a lot of liquid residue on the surface of the diaphragm after liquid removal, and the residual liquid on the surface of the film after liquid removal is often uneven in thickness. When the diaphragm is dried, the uneven residual liquid has different drying times, which often forms water stains on the film surface after drying, causing a great impact on the appearance of the diaphragm and resulting in quality waste.

[0004] Therefore, there is an urgent need for a battery diaphragm liquid removal device and a battery diaphragm production system to solve the above problems. Utility Model Content

[0005] One purpose of the utility model is to provide a battery diaphragm liquid removal device, which can reduce the liquid residue on the surface of the diaphragm, achieve uniform liquid removal, and have a good liquid removal effect.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Provided is a battery diaphragm liquid removal device, comprising:

[0008] at least one first pulling roller, the first pulling roller being pressed against the first side of the diaphragm;

[0009] a first liquid removal device, the first liquid removal device is located at the rear end of the first traction roller in the moving direction of the diaphragm, the first liquid removal device comprises a second traction roller and a blower mechanism, the second traction roller is used to abut against the second surface of the diaphragm, the air outlet of the blower mechanism is correspondingly arranged at one side of the second traction roller, and the blower mechanism is used to blow off the liquid on the surface of the diaphragm;

[0010] The second liquid removal device is located at the rear end of the first liquid removal device in the moving direction of the diaphragm, and the second liquid removal device includes two liquid suction rollers, which are respectively located on the two sides of the diaphragm, and the liquid suction rollers are used to absorb the liquid on the surface of the diaphragm.

[0011] As an optional solution for battery diaphragm dehydration equipment, the battery diaphragm dehydration equipment includes two first dehydration devices, each of the first dehydration devices includes a second traction roller and a blower mechanism, the two second traction rollers are used to respectively abut the first side and the second side of the diaphragm, the air outlets of the two blower mechanisms are respectively arranged on one side of the two second traction rollers, and the blower mechanism is used to blow off the liquid on the surface of the diaphragm.

[0012] As an optional solution for the battery diaphragm dehydration equipment, the angle between the film feeding direction and the film discharging direction of each of the first traction rollers is less than or equal to 90°.

[0013] As an optional solution for the battery diaphragm dehydration device, the angle between the blowing direction of the air blowing mechanism and the moving direction of the diaphragm is 20°-80°; and / or the air outlet size of the air blowing mechanism is adjustable.

[0014] As an optional solution for the battery diaphragm deliquidation equipment, the first deliquidation device also includes a first temperature control mechanism, which is used to control the air outlet temperature of the air blowing mechanism; and / or the second deliquidation device also includes a second temperature control mechanism, which is used to change the surface temperature of the suction roller.

[0015] As an optional solution of the battery diaphragm dehydration equipment, the second dehydration device includes a first displacement mechanism, and the first displacement mechanism can drive the suction roller to approach or move away from the diaphragm.

[0016] As an optional solution for the battery diaphragm deliquoring equipment, the second deliquoring device further comprises two pressing rollers, the two pressing rollers are respectively pressed against the two liquid absorbing rollers, and the pressing rollers are used to squeeze out the liquid absorbed by the liquid absorbing rollers.

[0017] As an optional solution of the battery diaphragm liquid removal equipment, the battery diaphragm liquid removal equipment also includes a liquid recovery unit, which can recover the liquid squeezed out by the first traction roller; and / or, the liquid recovery unit can recover the liquid blown off by the air blowing mechanism; and / or, the liquid recovery unit can recover the liquid squeezed out by the pressure roller on the liquid suction roller.

[0018] As an optional solution of the battery diaphragm dehydration equipment, the second dehydration device includes a second displacement mechanism, and the second displacement mechanism can drive the pressure roller to approach or move away from the suction roller.

[0019] Another object of the utility model is to provide a battery diaphragm production system, which can reduce the liquid residue after the diaphragm is deliquescent and has a good deliquescence effect.

[0020] To achieve this purpose, the utility model adopts the following technical solutions:

[0021] A battery diaphragm production system comprises a washing area, a drying area and the above-mentioned battery diaphragm dehydration equipment, wherein the battery diaphragm dehydration equipment is located between the washing area and the drying area.

[0022] Beneficial effects of the utility model:

[0023] The utility model provides a battery diaphragm deliquidation device, which first squeezes the first surface of the diaphragm through a first traction roller, so that part of the liquid on the surface of the first surface of the diaphragm is squeezed out, thereby realizing pre-deliquidation of the diaphragm. The second traction roller abuts against the second surface of the diaphragm, and can squeeze out part of the liquid on the surface of the second surface of the diaphragm, and the air outlet of the blower mechanism is correspondingly arranged on one side of the second traction roller. During the movement of the diaphragm, part of the diaphragm that moves to one side of the second traction roller can pass through the air outlet of the blower mechanism, so that the blower mechanism blows off the liquid on the surface of the diaphragm, thereby further realizing deliquidation of the diaphragm. After the diaphragm leaves the second traction roller, it passes through a liquid suction roller to further absorb the liquid on both sides of the diaphragm, thereby reducing the residual liquid on the surface of the diaphragm, and the liquid suction roller can evenly absorb the liquid on the surface of the diaphragm, thereby avoiding water stains on the surface of the diaphragm. The battery diaphragm deliquidation device can reduce the residual liquid on the surface of the diaphragm by deliquiding the diaphragm multiple times, thereby realizing even deliquidation, and has a good deliquidation effect.

[0024] The utility model also provides a battery diaphragm production system, in which the diaphragm passes through a battery diaphragm liquid removal device from a washing area into a drying area, which can reduce water stains on the diaphragm surface, ensure a good appearance of the diaphragm, and improve the quality of the diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the battery separator production system provided by the utility model;

[0026] Figure 2 It is a schematic diagram of the second traction roller and the second collecting tank of the battery diaphragm liquid removal equipment provided by the utility model.

[0027] In the figure:

[0028] 1. The first traction roller;

[0029] 2. first liquid removal device; 21. second traction roller; 22. blower mechanism; 221. blower; 222. blower pipe; 223. air nozzle; 23. first temperature control mechanism;

[0030] 3. Second liquid removal device; 31. Liquid suction roller; 32. First displacement mechanism; 33. Pressing roller; 34. Second displacement mechanism; 35. Second temperature control mechanism;

[0031] 4. Liquid recovery unit; 41. Second collection tank; 42. Third collection tank; 43. Collection pipeline; 44. Delivery pump; 45. Exhaust structure; 451. Baffle; 452. Exhaust hole;

[0032] 100, diaphragm; 200, washing area; 300, drying area. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0034] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0037] This embodiment is described by taking a wet-process battery diaphragm production system as an example. It can be understood that this solution can also be used for removing liquid before drying in the water washing process of the coated diaphragm, and is not limited to the description of this embodiment.

[0038] like Figure 1 As shown, the battery diaphragm deliquidation device includes a second deliquidation device 3, at least one first traction roller 1 and two first deliquidation devices 2. The first traction roller 1 is pressed against the first surface of the diaphragm 100. The first deliquidation device 2 is located at the rear end of all the first traction rollers 1 in the moving direction of the diaphragm 100. The first deliquidation device 2 includes a second traction roller 21 and a blower mechanism 22. The second traction roller 21 abuts against the second surface of the diaphragm 100. The air outlets of the blower mechanism 22 are respectively arranged on one side of the two second traction rollers 21. The blower mechanism 22 is used to blow off the liquid on the surface of the diaphragm 100. The second deliquidation device 3 is located at the rear end of the first deliquidation device 2 in the moving direction of the diaphragm 100. The second deliquidation device 3 includes two liquid suction rollers 31. The two liquid suction rollers 31 are respectively located on both sides of the diaphragm 100. The liquid suction rollers 31 can absorb the liquid on the surface of the diaphragm 100.

[0039] This embodiment provides a battery diaphragm deliquidation device, which squeezes the first surface of the diaphragm 100 by the first traction roller 1, so that part of the liquid on the surface of the first surface of the diaphragm 100 is squeezed out, thereby achieving pre-liquid removal of the diaphragm 100. The second traction roller 21 abuts against the second surface of the diaphragm 100, and can squeeze out part of the liquid on the surface of the second surface of the diaphragm 100, and the air outlet of the air blowing mechanism 22 is correspondingly arranged on one side of the second traction roller 21. During the movement of the diaphragm 100, the part of the diaphragm 100 that moves to the side of the second traction roller 21 can pass through the air outlet of the air blowing mechanism 22, so that the air blowing mechanism 22 blows off the liquid on the surface of the diaphragm 100, further achieving deliquidation of the diaphragm 100. After the diaphragm 100 leaves the second traction roller 21, it passes through the liquid suction roller 31 to further absorb the liquid on both sides of the diaphragm 100, reducing the liquid residue on the surface of the diaphragm 100, and the liquid suction roller 31 can evenly absorb the liquid on the surface of the diaphragm 100 to avoid water stains on the surface of the diaphragm 100. The battery diaphragm liquid removal device can reduce the liquid residue on the surface of the diaphragm 100 by performing liquid removal on the diaphragm 100 multiple times, achieve uniform liquid removal, and have a good liquid removal effect.

[0040] Reference Figure 1 After the diaphragm 100 is removed from the washing area 200, it first passes through the first traction roller 1. The first traction roller 1 squeezes the diaphragm 100 to remove part of the liquid on the surface of the diaphragm 100, thereby achieving pre-liquid removal of the diaphragm 100. In this embodiment, one first traction roller 1 is provided, and the first traction roller 1 and one of the second traction rollers 21 can squeeze the two sides of the diaphragm 100 respectively, thereby achieving pre-liquid removal of the two sides of the diaphragm 100. In some other embodiments, two first traction rollers 1 can also be provided, and the two first traction rollers 1 can squeeze the two sides of the diaphragm 100 respectively, thereby achieving pre-liquid removal of the two sides of the diaphragm 100. Of course, three, four, etc. first traction rollers 1 can also be provided, so that the surface of the diaphragm 100 is squeezed multiple times to achieve multiple pre-liquid removal and improve the liquid removal effect.

[0041] Preferably, the angle between the film feeding direction and the film outlet direction of each first traction roller 1 is less than or equal to 90°, and such a setting can ensure that the first traction roller 1 can have a sufficiently large contact area with the diaphragm 100, thereby improving the squeezing effect on the surface of the diaphragm 100. Optionally, the angle between the film feeding direction and the film outlet direction of the first traction roller 1 can be set to 30°, 45° or 60°, etc.

[0042] After the diaphragm 100 leaves the first traction roller 1, it enters the first liquid removal device 2. When the diaphragm 100 passes the second traction roller 21, air is blown into the air nozzle 223 by the fan 221 through the blowing pipe 222. The air is blown out by the air nozzle 223 to form an air knife. The air knife blows off the liquid on the side of the diaphragm 100 facing the air nozzle 223, and the two first liquid removal devices 2 can blow off the liquid on both sides of the diaphragm 100. The first liquid removal device 2 uses non-contact air knife liquid removal, which can meet the needs of continuous production of the diaphragm 100, and is particularly suitable for the working conditions of high-speed production lines. The non-contact liquid removal device can effectively reduce scratches caused by contact between the liquid removal device and the surface of the diaphragm 100. In addition, reducing the contact between the diaphragm 100 and the air blowing mechanism 22 can also reduce the maintenance of the air blowing mechanism 22, which can significantly reduce the downtime and cleaning time of the battery diaphragm liquid removal equipment and improve production efficiency.

[0043] Preferably, the battery diaphragm deliquidation equipment includes two first deliquidation devices 2, each of the first deliquidation devices 2 includes a second traction roller 21 and a blower mechanism 22, the two second traction rollers 21 are used to respectively abut the first side and the second side of the diaphragm 100, and the air outlets of the two blower mechanisms 22 are respectively arranged on one side of the two second traction rollers 21, and the blower mechanism 22 is used to blow off the liquid on the surface of the diaphragm 100. Such a setting can more comprehensively blow and deliquidate the first side and the second side of the diaphragm 100 to ensure the deliquidation effect.

[0044] Preferably, the angle between the blowing direction of the air blowing mechanism 22 and the diaphragm 100 is 20°-80°, and by adjusting the angle between the blowing direction and the diaphragm 100, the liquid removal effect is ensured while avoiding damage to the diaphragm 100 by the air knife. Optionally, the blowing direction of the air blowing mechanism 22 is adjusted by a worm gear mechanism, and the angle between the blowing direction and the diaphragm 100 can be set to 20°, 40°, 60° or 80°, etc.

[0045] Furthermore, the size of the air outlet of the blower mechanism 22 can be adjusted. Specifically, the fan 221 adopts a variable frequency fan, and the width of the air outlet of the air nozzle 223 can be adjusted between 0.5mm-5mm, which is convenient for adjusting the size of the air outlet of the air nozzle 223 to meet the dehydration requirements of different production speeds and different diaphragm thicknesses, and expand the applicability of the battery diaphragm dehydration equipment. Optionally, the air outlet width can be set to 0.5mm, 1mm, 2mm, 3mm, 4mm or 5mm, etc. In addition, the air nozzle 223 is made of 316 stainless steel, which has good corrosion resistance and ensures the service life of the air nozzle 223.

[0046] Furthermore, the first liquid removal device 2 further includes a first temperature control mechanism 23 , and the first temperature control mechanism 23 is used to control the air outlet temperature of the air blowing mechanism 22 to prevent the air knife from damaging the diaphragm 100 .

[0047] After passing through the two first liquid removal devices 2, the membrane 100 enters the second liquid removal device 3. In this embodiment, the second liquid removal device 3 includes two liquid suction rollers 31, which are symmetrically arranged on both sides of the membrane 100, and the liquid suction rollers 31 can absorb the residual liquid on the surface of the membrane 100.

[0048] Furthermore, the second liquid removal device 3 also includes two pressing rollers 33, which are respectively pressed on the two liquid absorption rollers 31, and the pressing rollers 33 are used to squeeze out the liquid absorbed by the liquid absorption rollers 31. After absorbing the liquid, the liquid absorption roller 31 is pressed with the pressing roller 33, so that the pressing roller 33 can squeeze out the liquid in the liquid absorption roller 31, ensuring that the roller surface of the liquid absorption roller 31 is dry and can absorb liquid again. At the same time, the pressing roller 33 has a self-cleaning function. The pressing roller 33 can clean and remove foreign matter attached to the surface of the liquid absorption roller 31 during the squeezing process to ensure the cleanliness of the surface of the liquid absorption roller 31.

[0049] Preferably, the liquid suction roller 31 is made of polyurethane foam material resistant to organic solvent corrosion. The polyurethane foam roller surface has the characteristics of strong liquid absorption and corrosion resistance, which can fully absorb the liquid on the surface of the diaphragm 100 to ensure the service life of the liquid suction roller 31. In addition, the pressure roller 33 is made of fluororubber material resistant to organic solvent corrosion to ensure the service life of the pressure roller 33.

[0050] Furthermore, the second liquid removal device 3 includes a first displacement mechanism 32, which can drive the liquid suction roller 31 to move closer to or away from the diaphragm 100. In this embodiment, the two liquid suction rollers 31 are arranged relatively to each other, and the relative movement of the two liquid suction rollers 31 is controlled by the first displacement mechanism 32. Optionally, the first displacement mechanism 32 is set as a first cylinder, and the air pressure of the first cylinder is controlled by a precision pressure regulating valve, and the pressure is precisely controlled to control the opening and closing degree between the two liquid suction rollers 31, and then the pressing degree of the two liquid suction rollers 31 is precisely controlled, so as to ensure the liquid suction effect while not over-squeezing the diaphragm 100 to prevent product defects.

[0051] Furthermore, the second liquid removal device 3 includes a second displacement mechanism 34, which can drive the pressure roller 33 to move closer to or farther from the liquid suction roller 31. In this embodiment, the second displacement mechanism 34 is configured as a second cylinder, and the pressure roller 33 controls the degree of pressing with the liquid suction roller 31 through the second cylinder, and squeezes out the dichloromethane liquid in the liquid suction roller 31 to ensure that the dry roller surface can absorb liquid again.

[0052] Optionally, the second liquid removal device 3 further includes a second temperature control mechanism 35, which is used to change the surface temperature of the suction roller 31. Specifically, the second temperature control mechanism 35 can pass hot water into the suction roller 31, and the second temperature control mechanism 35 is configured with a temperature control element, which can effectively control the surface temperature of the suction roller 31 and prevent the roller surface from icing due to the evaporation of a large amount of dichloromethane.

[0053] Further, refer to Figure 1 and Figure 2 , the battery diaphragm deliquidation device also includes a liquid recovery unit 4, which can be configured to recover the liquid squeezed out by the first traction roller 1, and / or, the liquid recovery unit 4 can recover the liquid blown off by the air blowing mechanism 22, and / or, the liquid recovery unit 4 is configured to recover the liquid squeezed out by the pressure roller 33 on the suction roller 31. In this embodiment, the liquid recovery unit 4 can recover all the above liquids. Specifically, the liquid recovery unit 4 includes a collecting tank assembly, which includes a first collecting tank (not shown in the figure), a second collecting tank 41, a third collecting tank 42, a collecting pipeline 43 and a delivery pump 44. The first collecting tank is located below the first traction roller 1, and is used to collect the liquid that flows out of the diaphragm 100 squeezed by the first traction roller 1. The second collecting tank 41 is located below the second traction roller 21, and is used to collect the liquid blown off by the air blowing mechanism 22. The third collecting tank 42 is located below the suction roller 31, and is used to collect the liquid squeezed out by the pressure roller 33 on the suction roller 31. The first collecting tank, the second collecting tank 41 and the third collecting tank 42 are all connected to the delivery pump 44 through the collection pipeline 43. The delivery pump 44 can deliver the liquid collected by the first collecting tank, the second collecting tank 41 and the third collecting tank 42 to the washing area 200 for reuse, saving costs. Preferably, the first collecting tank, the second collecting tank 41 and the third collecting tank 42 all adopt a structure of being wide at the top and narrow at the bottom to prevent liquid splashing.

[0054] Preferably, continue to refer to Figure 2 The liquid recovery unit 4 is also provided with a gas separation structure 45. Specifically, the exhaust structure 45 is arranged in the collecting tank assembly. The exhaust structure 45 includes a baffle 451 and an exhaust hole 452. The baffle 451 can prevent the liquid from entering the exhaust structure 45. The exhaust hole 452 is used to exhaust the gas. The gas is transported to the outside of the collecting tank assembly through the exhaust structure 45 to ensure the stability of the air pressure in the collecting tank assembly.

[0055] The present embodiment also provides a battery diaphragm production system, including a washing area 200, a drying area 300 and the above-mentioned battery diaphragm dehydration equipment, the battery diaphragm dehydration equipment is located between the washing area 200 and the drying area 300, the diaphragm 100 passes through the battery diaphragm dehydration equipment from the washing area 200 and enters the drying area 300, and completes the washing, dehydration and drying processes in sequence, which can reduce water stains on the surface of the diaphragm, ensure the good appearance of the diaphragm, and improve the quality of the diaphragm.

[0056] When using the battery diaphragm production system proposed in this embodiment, the diaphragm 100 moves out of the washing area 200 and enters the first traction roller 1. The first traction roller 1 pre-de-liquidates the diaphragm 100 and squeezes out part of the liquid from the surface of the diaphragm 100. The squeezed liquid is collected by the first collecting tank. After that, the diaphragm 100 enters the first de-liquidation device 2. When passing through the second traction roller 21, the air blowing mechanism 22 blows off the liquid on the surface of the diaphragm 100, further removing the liquid from the diaphragm 100. The blown-off liquid is collected by the second collecting tank 41. Then, the diaphragm 100 enters the second de-liquidation device 3. Two liquid suction rollers 31 are symmetrically arranged on both sides of the diaphragm 100 to absorb the residual liquid on the surface of the diaphragm 100. The two pressing rollers 33 are respectively squeezed on the two liquid suction rollers 31 to squeeze out the liquid absorbed by the liquid suction rollers 31. The squeezed liquid is collected by the third collecting tank 42. The membrane 100 removed from the second liquid removal device 3 enters the drying area 300 for drying treatment, and the delivery pump 44 can deliver the liquid collected in the first collection tank, the second collection tank 41 and the third collection tank 42 to the washing area 200 for reuse.

[0057] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Battery diaphragm deliquescence equipment, characterized in that: include: at least one first pulling roller (1), the first pulling roller (1) being used for squeezing a first side of the diaphragm (100); A first liquid removal device (2), the first liquid removal device (2) being located at the rear end of the first traction roller (1) in the moving direction of the diaphragm (100), the first liquid removal device (2) comprising a second traction roller (21) and a blower mechanism (22), the second traction roller (21) being used for abutting against the second surface of the diaphragm (100), the air outlet of the blower mechanism (22) being correspondingly arranged at one side of the second traction roller (21), and the blower mechanism (22) being used for blowing off the liquid on the surface of the diaphragm (100); A second liquid removal device (3), wherein the second liquid removal device (3) is located at the rear end of the first liquid removal device (2) in the moving direction of the diaphragm (100), and the second liquid removal device (3) comprises two liquid suction rollers (31), wherein the two liquid suction rollers (31) are respectively located on two sides of the diaphragm (100), and the liquid suction rollers (31) are used to absorb the liquid on the surface of the diaphragm (100).

2. The battery diaphragm liquid removal equipment according to claim 1, characterized in that: The battery diaphragm deliquidation equipment comprises two first deliquidation devices (2), each of the first deliquidation devices (2) comprises a second traction roller (21) and a blower mechanism (22), the two second traction rollers (21) are used to respectively abut against the first surface and the second surface of the diaphragm (100), the air outlets of the two blower mechanisms (22) are respectively arranged on one side of the two second traction rollers (21), and the blower mechanism (22) is used to blow off the liquid on the surface of the diaphragm (100).

3. The battery diaphragm liquid removal equipment according to claim 1, characterized in that: The included angle between the film feeding direction and the film discharging direction of each of the first traction rollers (1) is less than or equal to 90°.

4. The battery diaphragm liquid removal equipment according to claim 1, characterized in that: The included angle between the blowing direction of the blowing mechanism (22) and the moving direction of the diaphragm (100) is 20°-80°; And / or, the air outlet size of the hair dryer mechanism (22) can be adjusted.

5. The battery diaphragm liquid removal equipment according to claim 1, characterized in that: The first liquid removal device (2) further comprises a first temperature control mechanism (23), wherein the first temperature control mechanism (23) is used to control the air outlet temperature of the air blowing mechanism (22); And / or, the second liquid removal device (3) further comprises a second temperature control mechanism (35), and the second temperature control mechanism (35) is used to change the surface temperature of the liquid suction roller (31).

6. The battery diaphragm liquid removal equipment according to claim 1, characterized in that: The second liquid removal device (3) comprises a first displacement mechanism (32), and the first displacement mechanism (32) is capable of driving the liquid suction roller (31) to move closer to or away from the diaphragm (100).

7. The battery diaphragm liquid removal equipment according to claim 1, characterized in that: The second liquid removal device (3) further comprises two pressing rollers (33), wherein the two pressing rollers (33) are respectively pressed against the two liquid absorbing rollers (31), and the pressing rollers (33) are used to squeeze out the liquid absorbed by the liquid absorbing rollers (31).

8. The battery diaphragm liquid removal equipment according to claim 7, characterized in that: The battery diaphragm liquid removal device further comprises a liquid recovery unit (4), wherein the liquid recovery unit (4) is capable of recovering the liquid squeezed out by the first traction roller (1); And / or, the liquid recovery unit (4) is capable of recovering the liquid blown off by the air blowing mechanism (22); And / or, the liquid recovery unit (4) is capable of recovering the liquid squeezed out by the pressure roller (33) on the liquid suction roller (31).

9. The battery diaphragm liquid removal equipment according to claim 8, characterized in that: The second liquid removal device (3) comprises a second displacement mechanism (34), and the second displacement mechanism (34) is capable of driving the pressure roller (33) to move closer to or away from the liquid suction roller (31).

10. Battery separator production system, characterized in that: It comprises a washing area (200), a drying area (300) and the battery diaphragm liquid removal device according to any one of claims 1 to 9, wherein the battery diaphragm liquid removal device is located between the washing area (200) and the drying area (300).

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