Auxiliary components adapted to the diaphragm drying equipment for redox flow batteries

Abstract

The present invention relates to the technical field of battery separator drying, specifically an auxiliary component adapted to a separator drying device for redox flow batteries, including a separator drying box. A vacuum pump and a nitrogen supply device are arranged at the rear inside of the separator drying box. The beneficial effects are as follows: The inside of the double-layer drying box is evacuated through the air extraction holes on the surface of the air extraction roller group, so that the internal pressure is reduced to a level lower than the atmospheric pressure, reducing the boiling point of the solvent on the membrane surface and enabling it to evaporate quickly to achieve the purpose of rapid drying. While the air extraction roller group drives and moves the membrane, air extraction is carried out to make the gas drive the evaporation of the solvent on the membrane surface. The nitrogen supply device inputs nitrogen into the inside of the conveying roller and enters the Type 7 gas conveying leaf tube, which is heated by the heating tube. Most of the heated nitrogen is discharged through the exhaust groove and the auxiliary exhaust groove, generating an oblique airflow with the rotation of the conveying roller to promote the transmission of the membrane. A small part of the heated nitrogen makes the membrane lifted through the exhaust slot, and the two sides of the membrane are evenly dried while moving.

Description

Technical Field

[0001] The invention belongs to the technical field of battery diaphragm drying, and in particular relates to an auxiliary component adapted to a diaphragm drying device for a redox flow battery. Background Art

[0002] The redox flow battery diaphragm is used in the redox flow battery to make the hydrogen ion permeability low. Since the sulfate ions are easy to permeate while inhibiting the metal ions in the electrolyte, the resistance of the redox flow battery can be reduced. In order to accurately test the characteristics of the ion exchange capacity of the redox flow battery diaphragm, the following method is used for measurement: first measure the weight of the redox flow battery diaphragm before soaking, then immerse the redox flow battery diaphragm in the ionic liquid for a period of time, take out the soaked redox flow battery diaphragm, rinse it with ion exchange water, put it into the drying equipment, dry it at a specific temperature for a period of time, and after drying, measure the dry weight of the redox flow battery diaphragm. The formula can be used to calculate the accurate value of the ion exchange capacity of the produced redox flow battery diaphragm. Therefore, the drying of the redox flow battery diaphragm is very important. The existing method for drying the diaphragm mainly adopts the hot air drying method. The diaphragm is dried by the hot air supplied during the traction of the diaphragm along the drying channel. However, the high velocity of the hot air flow causes the diaphragm to be stretched and deformed to a certain extent by the air flow.

[0003] The existing Chinese patent document with publication number CN116358273B proposes that a first flexible heat-conducting metal plate is provided at the upper end of the inner cavity of the drying box, a second flexible heat-conducting metal plate is provided at the lower end of the inner cavity of the drying box, guide rollers are provided inside the drying box, and the upper surfaces of the first flexible heat-conducting metal plate and the second flexible heat-conducting metal plate are provided with vacuum boxes to make the diaphragm close to the heat-conducting metal plate for drying. However, the temperature of the flexible heat-conducting metal plate may be unstable, resulting in uneven heating of the diaphragm. Secondly, at high temperature, the diaphragm may be thermally deformed when it is attached to the flexible metal plate, affecting the quality of the diaphragm.

[0004] Therefore, the present invention proposes an auxiliary component compatible with the diaphragm drying equipment for redox flow batteries, which solves the problem of uneven heating and thermal deformation of the diaphragm caused by close heating and drying of the diaphragm through a flexible heat-conducting plate in the prior art. A roller assembly with exhaust holes in a drying box is designed to drive and reel up the diaphragm. In conjunction with specific pipelines, the air in the drying box is extracted to form a low-pressure state to reduce the boiling point of the solvent on the membrane surface and accelerate the evaporation and drying of the membrane. At the same time, an inert gas is injected to take away the evaporated water or solvent vapor and reduce its re-condensation on the material surface. The gas is discharged through the pores to support the diaphragm, which not only avoids deformation of the membrane but also makes the diaphragm heated evenly. Summary of the invention

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide an auxiliary component adapted to the diaphragm drying equipment for redox flow batteries to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: an auxiliary component adapted to the diaphragm drying equipment for redox flow batteries, including a diaphragm drying box. A vacuum pump and a nitrogen supply device are arranged at the rear inside of the diaphragm drying box, and the nitrogen supply device is arranged below the vacuum pump. It is characterized in that: a double-layer drying box is arranged inside the diaphragm drying box, a winding and unwinding component is symmetrically arranged up and down on one side of the double-layer drying box, auxiliary air extraction components are distributed on both sides of the double-layer drying box, and pneumatic conveying roller components are evenly distributed in the middle of the auxiliary air extraction components.

[0007] Preferably, an air extraction pipeline is arranged inside the double-layer drying box, an air extraction pipe is fixedly installed at the top of the air extraction pipeline, one end of the air extraction pipe is fixedly connected to the air extraction input end of the vacuum pump, a middle fixing plate is fixedly installed in the middle of the double-layer drying box, a rear closing plate is fixedly installed at the rear end of the double-layer drying box through bolts, and a nitrogen delivery pipe is fixedly installed in the middle of the outer side of the rear closing plate.

[0008] Preferably, the auxiliary air extraction component includes an air extraction roller group rotatably installed on the inner wall of the middle fixing plate. The air extraction roller group is a hollow rotating roller, air extraction small holes are evenly distributed on the surface of the air extraction roller group, an air extraction insertion pipe 1 is fixedly installed at the front end of the air extraction roller group, one end of the air extraction insertion pipe 1 penetrates through the side wall of the air extraction pipeline, a porous absorption gasket is sleeved on the outer surface of the air extraction roller group, and a transmission component 1 for driving the air extraction roller group to rotate is arranged at the rear side of the middle fixing plate.

[0009] Preferably, the pneumatic conveying roller component includes a conveying roller rotatably installed on the inner wall of the middle fixing plate. 7-shaped air delivery leaf pipes are evenly distributed on the side wall of the conveying roller, one end of the 7-shaped air delivery leaf pipe penetrates through the inner wall of the conveying roller, and a transmission component 2 for driving the conveying roller to rotate is arranged at the rear side of the middle fixing plate.

[0010] Preferably, exhaust grooves and auxiliary exhaust grooves are formed on the inclined surface at the other end of the 7-shaped air delivery leaf pipe. The exhaust grooves are inclined upward at 45°, the auxiliary exhaust grooves are inclined upward at 60°, the auxiliary exhaust grooves are arranged below the exhaust grooves, and exhaust slits are evenly formed on the plane at the other end of the 7-shaped air delivery leaf pipe. The exhaust slits are in an inverted V shape.

[0011] Preferably, a fixed insertion tube is inserted and installed inside the conveying roller. A nitrogen inlet is provided in the middle of the fixed insertion tube. The inner surface of the nitrogen inlet is fixedly connected to one end of a branch pipe of the nitrogen delivery pipe. Nitrogen discharge grooves are symmetrically formed on the upper and lower sides of the inner side wall of the fixed insertion tube. Heating tubes are symmetrically and fixedly installed on the upper and lower sides of the side wall of the fixed insertion tube.

[0012] Preferably, inclined partition plates are symmetrically arranged on both sides of the nitrogen discharge groove. The outer surface of the inclined partition plate is attached to the inner surface of the conveying roller. The nitrogen discharge groove and the heating tube are vertically distributed.

[0013] Preferably, the winding and unwinding assembly includes winding rollers that are symmetrically and rotatably installed on one side of the middle fixing plate. A transmission assembly three for driving the rotation of the winding rollers is arranged at the rear of the middle fixing plate. The winding roller is a hollow tube. A second air extraction insertion tube is fixedly installed in the middle of one end of the winding roller. One end of the second air extraction insertion tube penetrates through the side wall of the air extraction pipeline.

[0014] Preferably, a hollow winding roller is snap-fitted on the outer surface of the winding roller. An installation groove adapted to the winding roller is formed at one end of the hollow winding roller.

[0015] Preferably, air extraction grooves are symmetrically formed on the side wall of the winding roller. Adsorption holes are evenly distributed on the side wall of the hollow winding roller.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] By designing a double-layer drying oven, the auxiliary air extraction assembly, the pneumatic conveying roller assembly, and the winding and unwinding assembly are circulated and distributed. The inside of the double-layer drying oven is evacuated through the air extraction holes on the surface of the air extraction roller group, so that the internal pressure is reduced to a level lower than the atmospheric pressure, the boiling point of the solvent on the film surface is reduced, and it is quickly evaporated to achieve the purpose of rapid drying. While the air extraction roller group drives the movement of the film, air extraction is carried out to make the gas drive the evaporation of the solvent on the film surface. The nitrogen supply device inputs nitrogen into the inside of the conveying roller. The nitrogen enters the 7-shaped air delivery leaf tube through the nitrogen discharge groove. When the conveying roller rotates and drives the 7-shaped air delivery leaf tube into the space between the nitrogen discharge grooves, most of the heated nitrogen is discharged through the exhaust grooves and auxiliary exhaust grooves on the 7-shaped air delivery leaf tube, and an oblique airflow is generated with the rotation of the conveying roller to promote the transmission of the film. A small part of the heated nitrogen makes the film lifted through the exhaust slits, achieving the purpose of promoting the movement of the film solely by the airflow, and drying the two sides of the film evenly while moving, solving the problems of uneven heating and thermal deformation of the separator caused by tightly heating and drying the separator through a flexible heat conduction plate in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall internal structure of the present invention.

[0019] Figure 2Schematic diagram of the overall external structure of the present invention.

[0020] Figure 3 Schematic diagram of one side structure inside the diaphragm drying oven of the present invention.

[0021] Figure 4 Schematic diagram of the other side structure inside the diaphragm drying oven of the present invention.

[0022] Figure 5 Schematic diagram of the rear side structure of the double-layer drying oven of the present invention.

[0023] Figure 6 Schematic diagram of the front side structure inside the double-layer drying oven of the present invention.

[0024] Figure 7 Schematic diagram of the pipeline layout structure on the rear side of the double-layer drying oven of the present invention.

[0025] Figure 8 Schematic diagram of the rear side structure inside the double-layer drying oven of the present invention.

[0026] Figure 9 Schematic diagram of the top view structure inside the double-layer drying oven of the present invention.

[0027] Figure 10 Schematic diagram of the main body structure inside the double-layer drying oven of the present invention.

[0028] Figure 11 Schematic diagram of the rear side structure of the middle fixing plate of the present invention.

[0029] Figure 12 Schematic diagram of the overall structure of the conveying roller of the present invention.

[0030] Figure 13 Schematic diagram of the disassembly structure of the fixed insertion tube of the present invention.

[0031] Figure 14 Schematic diagram of the internal structure of the conveying roller of the present invention.

[0032] Figure 15 Schematic diagram of the cross-sectional structure of the conveying roller of the present invention.

[0033] Figure 16 Schematic diagram of the overall structure of the auxiliary air extraction assembly of the present invention.

[0034] Figure 17 Schematic diagram of the overall structure of the winding and unwinding assembly of the present invention.

[0035] Figure 18 Schematic diagram of the disassembly structure of the hollow winding roller of the present invention.

[0036] Figure 19 Schematic diagram of the single structure of the air extraction roller group of the present invention.

[0037] Figure 20 This is a schematic cross-sectional structure diagram of a single unit of the air extraction roll group of the present invention.

[0038] Figure 21 This is a schematic cross-sectional structure diagram of the air extraction box of the present invention.

[0039] Figure 22 This is for the present invention Figure 15 Schematic enlarged structure diagram at position A.

[0040] Figure 23 This is for the present invention Figure 20 Schematic enlarged structure diagram at position B.

[0041] In the figure: 1. Diaphragm drying oven; 11. Vacuum air extraction pump; 12. Nitrogen supply equipment; 2. Double-layer drying oven; 21. Air extraction pipeline; 211. Air extraction pipe; 212. Air extraction box; 2121. Extraction inclined hole; 2122. Reset C-shaped gasket; 22. Rear closing plate; 221. Nitrogen delivery pipe; 23. Middle fixing plate; 3. Auxiliary air extraction component; 31. Air extraction roll group; 311. Elastic tube; 32. Air extraction insertion tube one; 33. Porous absorption gasket; 34. Transmission component one; 4. Pneumatic conveying roll component; 41. Conveying roll; 42. 7-shaped air delivery blade tube; 421. Exhaust groove; 422. Auxiliary exhaust groove; 423. Exhaust slot; 43. Fixed insertion tube; 431. Nitrogen inlet; 432. Heating tube; 433. Nitrogen discharge groove; 434. Inclined partition plate; 44. Transmission component two; 5. Rewinding and unwinding component; 51. Rewinding roll; 511. Air extraction groove; 52. Air extraction insertion tube two; 53. Hollow winding roll; 531. Adsorption hole; 532. Installation groove; 54. Transmission component three. Specific embodiments

[0042] In order to clearly and completely describe the purpose, technical solution of the present invention, and make the advantages more clear, the following further details the embodiments of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0043] Example 1, please refer to Figures 1 to 23, the present invention provides a technical solution: an auxiliary component adapted to a diaphragm drying device for a redox flow battery, including a diaphragm drying oven 1. A vacuum pump 11 and a nitrogen supply device 12 are arranged at the rear inside the diaphragm drying oven 1. The nitrogen supply device 12 is arranged below the vacuum pump 11. A double-layer drying oven 2 is arranged inside the diaphragm drying oven 1. A winding and unwinding component 5 is symmetrically arranged up and down on one side of the double-layer drying oven 2. Auxiliary air extraction components 3 are distributed on both sides of the double-layer drying oven 2. Pneumatic conveying roller components 4 are evenly distributed in the middle of the auxiliary air extraction components 3. An air extraction pipe 21 is arranged inside the double-layer drying oven 2. A suction pipe 211 is fixedly installed at the top of the air extraction pipe 21. One end of the suction pipe 211 is fixedly connected to the air extraction input end of the vacuum pump 11. A middle fixing plate 23 is fixedly installed in the middle of the double-layer drying oven 2. A rear closing plate 22 is fixedly installed at the rear end of the double-layer drying oven 2 by bolts. A nitrogen delivery pipe 221 is fixedly installed in the middle of the outer side of the rear closing plate 22. The auxiliary air extraction component 3 includes an air extraction roller group 31 rotatably installed on the inner wall of the middle fixing plate 23. The air extraction roller group 31 is a hollow rotating roller. Air extraction small holes are evenly distributed on the surface of the air extraction roller group 31. An air extraction insertion pipe 1 32 is fixedly installed at the front end of the air extraction roller group 31. One end of the air extraction insertion pipe 1 32 penetrates through the side wall of the air extraction pipe 21. A porous absorption gasket 33 is sleeved on the outer surface of the air extraction roller group 31. A transmission component 1 34 for driving the air extraction roller group 31 to rotate is arranged at the rear side of the middle fixing plate 23; in this embodiment, a sealing door adapted to the double-layer drying oven 2 is arranged at the front end of the diaphragm drying oven 1. The air extraction pipe 21 arranged outside the double-layer drying oven 2 forms a loop air extraction pipe. A temperature and pressure monitoring device is arranged above the double-layer drying oven 2. The air extraction roller group 31 communicates with the air extraction pipe 21 through the air extraction insertion pipe 1 32. The vacuum pump 11 can extract air from the air extraction pipe 21 through the suction pipe 211. The air inside the double-layer drying oven 2 is extracted through the air extraction small holes on the surface of the air extraction roller group 31, so that the internal pressure is reduced to a level lower than the atmospheric pressure. In this way, the boiling point of the solvent on the membrane surface can be reduced, and it can be quickly evaporated to achieve the purpose of quick drying. Through the design of the gear and gear ring meshing of the transmission component 1 34, the air extraction roller group 31 can drive the membrane to move. While helping to promote the movement of the membrane inside the double-layer drying oven 2, air is extracted to drive the evaporation of the solvent on the membrane surface. The porous absorption gasket 33 is sleeved on the outside of the air extraction roller group 31. The porous absorption gasket 33 is a porous support material that can provide sufficient support to prevent the membrane from directly adsorbing on the air extraction roller group 31. The porous material allows gas to pass through, which helps to evenly adsorb and remove the moisture on the membrane surface. It should be noted that the vacuum pump 11 can be set to have an intermittent air suction process. After sucking air for a period of time, it pauses for a few microseconds and then continues to suck air, cooperating with the rotation of the air extraction roller group 31 to achieve the purpose of transporting the membrane.

[0044] Example 2, please refer to Figures 1 to 23, on the basis of the first embodiment, in order to achieve the purpose of uniformly evacuating the inside of the double-layer drying box 2, the present embodiment further proposes that air extraction boxes 212 are symmetrically arranged up and down on the inner side of the double-layer drying box 2. One end of the air extraction box 212 penetrates the inner wall of the air extraction pipeline 21. Extraction inclined holes 2121 are evenly distributed on the surface of the air extraction box 212. The extraction inclined holes 2121 are inclined at 45° and arranged at equal intervals. A reset C-shaped pad 2122 is arranged between the extraction inclined holes 2121. The inclination directions of the upper and lower groups of extraction inclined holes 2121 are opposite. Elastic tubes 311 are evenly distributed on the outer surface of the air extraction roller group 31. The outer surface of the elastic tube 311 is in contact with the inner surface of the porous absorption gasket 33; in this embodiment, the air extraction boxes 212 are symmetrically designed up and down and communicate with the side wall of the air extraction pipeline 21, which can evacuate the surface of the film when the film passes through to accelerate the drying of its surface. By obliquely designing the extraction inclined holes 2121 and cooperating with the intermittent air extraction of the vacuum air extraction pump 11, there is an oblique attracting and pulling effect on the film during each air extraction, which can cooperate with the transmission of the film for winding and unwinding. A reset C-shaped pad 2122 is arranged between the extraction inclined holes 2121, which can rebound and separate the film from the surface of the air extraction box 212 during the intermittent period after the film is adsorbed. The elastic tubes 311 arranged on the outer side wall of the air extraction roller group 31 also have an expanding and supporting effect on the porous absorption gasket 33, so that the film can be promoted to be released during the intermittent period after being adsorbed, so as to achieve the purpose of smooth movement of the film.

[0045] Embodiment 3, please refer to Figures 1 to 23, on the basis of the second embodiment, in order to enable the film to be dried evenly during the transmission process, this embodiment further proposes that the pneumatic conveying roller assembly 4 includes a conveying roller 41 rotatably installed on the inner wall of the middle fixing plate 23. The side wall of the conveying roller 41 is evenly distributed with 7-shaped air conveying leaf tubes 42. One end of the 7-shaped air conveying leaf tube 42 penetrates the inner wall of the conveying roller 41. A second transmission assembly 44 for driving the conveying roller 41 to rotate is arranged at the rear side of the middle fixing plate 23. An exhaust groove 421 and an auxiliary exhaust groove 422 are formed on the inclined surface at the other end of the 7-shaped air conveying leaf tube 42. The exhaust groove 421 is inclined upward at 45°, and the auxiliary exhaust groove 422 is inclined upward at 60°. The auxiliary exhaust groove 422 is arranged below the exhaust groove 421. Exhaust slots 423 are evenly formed on the flat surface at the other end of the 7-shaped air conveying leaf tube 42. The exhaust slots 423 are in an inverted V shape. A fixed insertion tube 43 is inserted and installed inside the conveying roller 41. A nitrogen inlet 431 is arranged in the middle of the fixed insertion tube 43. The inner surface of the nitrogen inlet 431 is fixedly connected to one end of the branch pipe of the nitrogen delivery pipe 221. Nitrogen discharge grooves 433 are symmetrically formed on the upper and lower inner side walls of the fixed insertion tube 43. Heating tubes 432 are symmetrically fixedly installed on the upper and lower side walls of the fixed insertion tube 43. Oblique partition plates 434 are symmetrically arranged on both sides of the nitrogen discharge groove 433. The outer surface of the oblique partition plate 434 is attached to the inner surface of the conveying roller 41. The nitrogen discharge groove 433 and the heating tube 432 are vertically distributed; in this embodiment, the fixed insertion tube 43 is inserted into the conveying roller 41 through the nitrogen delivery pipe 221. The nitrogen supply device 12 inputs nitrogen into the conveying roller 41. Injecting nitrogen can help break the steam layer on the film surface, promote the evaporation of moisture or solvent, and can maintain the pressure in the double-layer drying box 2 at a relatively stable level, avoiding problems caused by too low pressure. By adjusting the flow rate of the nitrogen gas, the pressure in the air extraction pipe 21 can be more precisely controlled to ensure the stability and controllability of the film drying process. The conveying rollers 41 are evenly distributed between the air extraction roller groups 31. Three are arranged in a row and there are three rows distributed up and down. Through the design of the chain and the second transmission assembly 44, the rotation directions of adjacent two rows are opposite. Nitrogen enters the 7-shaped air conveying leaf tube 42 through the nitrogen discharge groove 433. The oblique partition plate 434 closes the nitrogen discharge area, which can extend the heating time of nitrogen by the heating tube 432. When the conveying roller 41 rotates to drive the 7-shaped air conveying leaf tube 42 into the space between the nitrogen discharge grooves 433, the heated nitrogen will enter the 7-shaped air conveying leaf tube 42. Most of the heated nitrogen is discharged through the exhaust groove 421 and the auxiliary exhaust groove 422, generating an oblique airflow with the rotation of the conveying roller 41 to promote the transmission of the film. Because the transmission directions of the upper and lower conveying rollers 41 are opposite, when the film enters between the conveying rollers 41, it is carried by the airflow and moves. The heated nitrogen can accelerate the drying of the moisture or solvent on the film surface. A small part of the heated nitrogen makes the film lifted through the exhaust slots 423, achieving the purpose of promoting the movement of the film simply by the airflow, and drying both sides of the film evenly while moving.

[0046] Embodiment 4, please refer toFigures 1 to 23 , on the basis of Embodiment III, in order to cooperate with the unwinding and rewinding during the film drying process, this embodiment further proposes that the unwinding and rewinding assembly 5 includes a winding roller 51 rotatably installed symmetrically up and down on one side of the middle fixing plate 23. A third transmission assembly 54 for driving the rotation of the winding roller 51 is arranged at the rear side of the middle fixing plate 23. The winding roller 51 is a hollow tube. A second air extraction insertion tube 52 is fixedly installed in the middle of one end of the winding roller 51. One end of the second air extraction insertion tube 52 penetrates through the side wall of the air extraction pipe 21. A hollow winding roll 53 is clamped and installed on the outer surface of the winding roller 51. An installation groove 532 adapted to the winding roller 51 is opened at one end of the hollow winding roll 53. Air extraction grooves 511 are symmetrically opened on the side wall of the winding roller 51. Adsorption holes 531 are evenly distributed on the side wall of the hollow winding roll 53; in this embodiment, align the installation groove 532 with the winding roller 51, sleeved the hollow winding roll 53 on the outside of the winding roller 51 and then rotate it by 90°, and use bolts to fix it to complete the fixation of the winding roller 51 and the hollow winding roll 53. After the hollow winding roll 53 and the winding roller 51 are installed, the air extraction groove 511 is aligned with the installation groove 532, and the winding roller 51 is communicated with the air extraction pipe 21 through the second air extraction insertion tube 52. As the vacuum pump 11 works, one end of the film can be adsorbed on the adsorption holes 531, and the third transmission assembly 54 works to drive the rotation of the winding roller 51, so that a roll of hollow winding roll 53 with the film already installed can be unwound, and the empty third transmission assembly 54 below winds up the dried film.

[0047] Embodiment V, please refer to Figures 1 to 23, on the basis of Embodiment 4, this embodiment also proposes a method for using an auxiliary component adapted to the diaphragm drying equipment for redox flow batteries, including the following steps: Step 1, open the sealing door of the diaphragm drying oven 1, install a roll of hollow roll 53 with the film installed on the upper winding roll 51, install an empty hollow roll 53 on the lower winding roll 51, sleeve the hollow roll 53 on the outside of the winding roll 51 and then rotate it 90°, and use bolts to fix it to complete the fixation of the winding roll 51 and the hollow roll 53; Step 2, start all the transmission components and the vacuum pump 11, pull one end of the unwound film so that it passes through the air extraction roll group 31 and the conveying roll 41 and winds around the surface of the empty hollow roll 53 below for adsorption winding, pause the transmission components, and close the sealing valve of the diaphragm drying oven 1; Step 3, after the vacuum pump 11 works for a period of time, start the nitrogen supply device 12 and the transmission components. The air extraction roll group 31 communicates with the air extraction pipeline 21 through the first air extraction insertion pipe 32. The vacuum pump 11 can extract air from the air extraction pipeline 21 through the air extraction pipe 211, and extract air from the inside of the double-layer drying oven 2 through the air extraction holes on the surface of the air extraction roll group 31. While the air extraction roll group 31 drives the film to move, it extracts air to make the gas drive the evaporation of the solvent on the film surface. The nitrogen supply device 12 inputs nitrogen into the inside of the conveying roll 41. The nitrogen passes through the nitrogen discharge groove 433 and enters the 7-shaped gas delivery leaf tube 42, and is heated by the heating tube 432. When the conveying roll 41 rotates and drives the 7-shaped gas delivery leaf tube 42 into the nitrogen discharge groove 433, the heated nitrogen will enter the 7-shaped gas delivery leaf tube 42. Most of the heated nitrogen is discharged through the exhaust groove 421 and the auxiliary exhaust groove 422 to generate an oblique airflow with the rotation of the conveying roll 41 to promote the transmission of the film. A small part of the heated nitrogen makes the film lifted through the exhaust slot 423, achieving the purpose of promoting the movement of the film simply by the airflow, and drying the two sides of the film evenly while moving; Step 4, the third transmission component 54 works to drive the winding roll 51 to rotate, so that a roll of hollow roll 53 with the film already installed can be unwound, and the empty third transmission component 54 below winds up the dried film.

[0048] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An auxiliary component adapted for a membrane drying device for a redox flow battery, comprising a membrane drying box (1), wherein a vacuum pump (11) and a nitrogen supply device (12) are arranged at the rear of the inner side of the membrane drying box (1), wherein the nitrogen supply device (12) is arranged below the vacuum pump (11), and characterized in that: The membrane drying box (1) is provided with a double-layer drying box (2) inside, and a winding and unwinding assembly (5) is symmetrically provided on one side of the double-layer drying box (2) from top to bottom, and auxiliary air extraction assemblies (3) are distributed on both sides of the double-layer drying box (2), and a pneumatic conveying roller assembly (4) is evenly distributed in the middle of the auxiliary air extraction assembly (3), and the pneumatic conveying roller assembly (4) includes a conveying roller (41) rotatably mounted on the inner wall of the middle fixed plate (23), and the side wall of the conveying roller (41) is evenly distributed with 7-type air delivery blade tubes (42), and the 7 One end of the 7-type air delivery blade tube (42) penetrates the inner wall of the conveying roller (41); an exhaust groove (421) and an auxiliary exhaust groove (422) are provided on the inclined surface of the other end of the 7-type air delivery blade tube (42); the exhaust groove (421) is inclined upward by 45 degrees; the auxiliary exhaust groove (422) is inclined upward by 60 degrees; the auxiliary exhaust groove (422) is arranged below the exhaust groove (421); and exhaust narrow grooves (423) are evenly provided on the plane of the other end of the 7-type air delivery blade tube (42); the exhaust narrow grooves (423) are in an inverted V shape.

2. The auxiliary component adapted for the membrane drying device for a redox flow battery according to claim 1, characterized in that: An exhaust pipe (21) is provided on the inner side of the double-layer drying box (2); an exhaust pipe (211) is fixedly mounted on the top of the exhaust pipe (21); one end of the exhaust pipe (211) is fixedly connected to an exhaust input end of a vacuum exhaust pump (11); a middle fixing plate (23) is fixedly mounted on the middle of the double-layer drying box (2); a rear closing plate (22) is fixedly mounted on the rear end of the double-layer drying box (2) by means of bolts; and a nitrogen delivery pipe (221) is fixedly mounted on the middle of the outer side of the rear closing plate (22).

3. The auxiliary component adapted for the membrane drying device for a redox flow battery according to claim 1, characterized in that: The auxiliary air extraction component (3) comprises an air extraction roller group (31) rotatably mounted on the inner wall of the middle fixed plate (23); the air extraction roller group (31) is a hollow rotating roller; the surface of the air extraction roller group (31) is evenly distributed with air extraction holes; an air extraction tube (32) is fixedly mounted at the front end of the air extraction roller group (31); one end of the air extraction tube (32) passes through the side wall of the air extraction pipe (21); a porous absorption gasket (33) is sleeved on the outer surface of the air extraction roller group (31); and a transmission component (34) for driving the air extraction roller group (31) to rotate is arranged at the rear side of the middle fixed plate (23).

4. The auxiliary component adapted for the membrane drying device for a redox flow battery according to claim 2, characterized in that: A transmission assembly 2 (44) for driving the conveying roller (41) to rotate is arranged on the rear side of the middle fixed plate (23).

5. The auxiliary component adapted for the membrane drying device for a redox flow battery according to claim 1, characterized in that: A fixed insert pipe (43) is inserted and installed inside the conveying roller (41); a nitrogen inlet (431) is provided in the middle of the fixed insert pipe (43); the inner surface of the nitrogen inlet (431) is fixedly connected to one end of a branch pipe of the nitrogen conveying pipe (221); nitrogen discharge grooves (433) are symmetrically provided on the inner side wall of the fixed insert pipe (43); and a heating pipe (432) is symmetrically fixedly installed on the side wall of the fixed insert pipe (43).

6. The auxiliary component adapted for the membrane drying device for a redox flow battery according to claim 5, characterized in that: Oblique partitions (434) are symmetrically arranged on both sides of the nitrogen discharge groove (433), the outer surface of the inclined partition (434) is in contact with the inner surface of the conveying roller (41), and the nitrogen discharge groove (433) and the heating tube (432) are vertically distributed.

7. The auxiliary component adapted for the membrane drying device for a redox flow battery according to claim 1, characterized in that: The reeling and unreeling assembly (5) comprises a reeling roller (51) symmetrically mounted on one side of a middle fixed plate (23) for rotation, and a transmission assembly (54) for driving the reeling roller (51) to rotate is arranged on the rear side of the middle fixed plate (23). The reeling roller (51) is a hollow tube, and a second air extraction tube (52) is fixedly mounted in the middle of one end of the reeling roller (51), and one end of the second air extraction tube (52) passes through the side wall of the air extraction pipe (21).

8. The auxiliary component adapted for the membrane drying device for a redox flow battery according to claim 7, characterized in that: A hollow winding roller (53) is clamped and mounted on the outer surface of the winding roller (51), and a mounting groove (532) matching the winding roller (51) is formed at one end of the hollow winding roller (53).

9. The auxiliary component adapted for the membrane drying device for a redox flow battery according to claim 8, characterized in that: The side wall of the winding roller (51) is symmetrically provided with air extraction grooves (511), and the side wall of the hollow winding roller (53) is evenly distributed with adsorption holes (531).

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