Apparatus and method for making battery separators from wood-based elastomers

Abstract

The present application belongs to a kind of equipment and method for making battery diaphragm with wood-based elastomer, and the method comprises: preparing the equipment of battery diaphragm; taking the tangential section of wood as 1-2mm thick raw wood sheet; removing more than 80% of the matrix inside the radial structure of the raw wood sheet by alkali treatment; cutting the treated wood sheet into battery diaphragm size by slitting device; adding electrolyte dropwise to soak the elastic diaphragm, which can be directly used for assembling battery. The equipment includes material feeding device, alkali treatment device, washing device, reaction treatment device, reaction termination device, soaking device, hot pressing device and slitting device. The present application has the advantages of green environmental protection, long service life, superior performance, low cost, high degree of mechanization and simple operation.

Description

Technical Field

[0001] The invention relates to a device and a method for manufacturing a battery separator using a wood-based elastomer. Background Art

[0002] The battery separator is a layer of separator material located between the positive and negative electrodes of the battery. Its function is to isolate the positive and negative electrodes and prevent the electrons in the battery from passing through freely, while allowing the ions in the electrolyte to pass freely between the positive and negative electrodes. The battery separator is a key part of the battery and has a direct impact on the safety and cost of the battery. The battery separator is generally made of PE (polyethylene) and PP (polypropylene).

[0003] With the rapid development of the new energy and energy storage markets, the application scenarios of high-performance batteries are becoming increasingly diverse, and the demand for batteries with high safety, high energy density, and long cycle life is also increasing. As the "safety valve" of the battery, the separator is the key to battery safety. The performance of the battery separator determines key characteristics such as battery capacity, cycle performance, and charge and discharge current density. Battery separators are a high-tech industry that the country has given priority to developing. Therefore, how to improve battery safety and cycle life and develop highly heat-resistant, high-performance battery separators has always been a direction of electrochemical exploration.

[0004] Wood is an important component of the earth's renewable biomass materials, a core carrier of global biological carbon sequestration, and an important strategic resource for national green development. As a sustainable, renewable and biodegradable material, wood is considered a potential alternative to petroleum-based materials. Natural wood has a very small strain limit within the elastic range and has long been used as a civil engineering material. However, as a biological material that has evolved for millions of years, wood has formed a structural basis that responds to environmental stimuli during the evolutionary process. It is an "intelligent material" that is responsive and adaptable to the environment. If the structure of wood can be precisely controlled, it can be given excellent elastic properties, which is of great significance to broaden its application in other fields. Summary of the Invention

[0005] The purpose of the present invention is to design an apparatus and method for producing battery separators using wood-based elastomers, which has the advantages of being green and environmentally friendly, having a long service life, superior performance, low cost, high degree of mechanization, and being simple and easy to operate.

[0006] To this end, the present invention provides a method for producing a battery separator using a wood-based elastomer, comprising the following steps:

[0007] (1) Equipment for preparing battery separators;

[0008] (2) Take a log veneer with a 1-2 mm thick tangential section;

[0009] (3) Adopting alkali treatment to remove more than 80% of the internal matrix of the ray structure of the raw wood sheet; the step of alkali treatment to remove the internal matrix of the ray structure of the raw wood sheet is:

[0010] (a) mixing the raw wood sheet with 10 wt% of an alkaline solution at a mass ratio of 1:50, stirring for 5-10 h at 90°C, after the reaction, repeatedly washing with distilled water until the pH of the wood sheet is neutral, the alkaline solution being any one of potassium hydroxide, sodium hydroxide, lithium hydroxide;

[0011] (b) mixing the wood sheet with a pH of 2 wt% of sodium hypochlorite solution at a mass ratio of 1:50, adjusting the pH to 4.9 with glacial acetic acid, and then heating and stirring for 5-10 h at 80-85°C; after the reaction is completed, adding 5-8% of ethanol based on the mass of the reaction solution, stopping the reaction for 1-2 h, removing the reaction solution, and then soaking for 10-24 h after washing with ultrapure water;

[0012] (c) after controlling the water content of the soaked wood sheet to be 20%, hot pressing at 60-170°C and 1-25 MPa for 0.1-24 h to obtain a wood-based elastic diaphragm;

[0013] (4) cutting the treated wood sheet into the size of a battery diaphragm using a slitting device;

[0014] (5) dripping electrolyte to soak the elastic diaphragm, and then directly assembling the battery, the electrolyte including electrolytes used in lithium, sodium, potassium metal / ion batteries, various water-based batteries, or capacitors.

[0015] As a further description of the above technical solution: the wood can be any kind of wood, the wood is first cut into equal length sections, and then each equal length section is string cut into an equal width raw wood sheet strip with a thickness of 1-2 mm, the first and last ends of each equal width raw wood sheet strip are bonded to form a sheet roll, and each process of alkali treatment to remove more than 80% of the internal matrix of the ray structure of the raw wood sheet roll and cutting the treated wood sheet into the size of a battery diaphragm is completed in a battery diaphragm device.

[0016] As a further description of the above technical solution: the dripping electrolyte adopts a conventional dripping method, and the soaking time is not more than 5 min.

[0017] An equipment for manufacturing a battery diaphragm using a wood-based elastomer, the equipment being an equipment for realizing the method of the present application, comprising a material feeding device, an alkali treatment device, a washing device, a reaction treatment device, a reaction termination device, a soaking device, a hot pressing device, and a slitting device.

[0018] The material feeding device is located in front of the alkali treatment device, the rear end of the alkali treatment device is communicated with the front end of the washing device, the front end of the reaction treatment device is connected with the rear end of the washing device, and the rear end of the reaction treatment device is sequentially provided with the reaction termination device, the soaking device, the hot pressing device and the splitting device.

[0019] The plate material is guided out of the plate material by the material feeding device, enters the alkali treatment device to complete the alkali treatment of the plate material, is pressed out of the plate material by the pulling plate mechanism and is sent into the washing device to complete repeated washing of the plate material to remove the alkali solution, then enters the reaction treatment device to perform a reaction treatment process of removing the matrix in the radial structure of the wood veneer, is pressed out of the plate material by the pulling plate mechanism and is sent into the reaction termination device to perform a reaction termination treatment, is pressed out of the plate material by the pulling plate mechanism and is sent into the soaking device to complete repeated washing of the plate material to remove the reaction termination solution, is pressed out of the plate material by the pulling plate mechanism and is sent into the hot pressing device to form a wood-based elastomer battery diaphragm strip, and finally is cut in the longitudinal and transverse directions by the splitting device to form a block-shaped wood-based elastomer battery diaphragm.

[0020] The alkali treatment device is characterized in that the lower end surface of the strip-shaped liquid storage tank is provided with a plurality of water return ports at intervals in the middle part, a plurality of water spraying pipes are arranged at intervals between the upper parts of the longitudinal two side walls of the liquid storage tank, each water return port is communicated with the water inlet of the water pump through a water return pipe, the water pump is arranged on one side of the lower end of the liquid storage tank, the water outlet of the water pump is communicated with each water spraying pipe through a water outlet pipe, a heater is arranged on the outer wall of the lower end surface of the liquid storage tank, a plurality of guide plate rollers are arranged at intervals between the middle parts of the longitudinal two side walls of the liquid storage tank, the plate material passes in front of the lower end of each guide plate roller, each guide plate roller is arranged on the middle part of the guide plate shaft, the guide plate shafts on the two sides are connected with the corresponding side walls of the liquid storage tank through a sealed bearing pair, a roller chain wheel is fixed on the outer side of each guide plate shaft, a ring-shaped roller transmission chain is arranged on each roller chain wheel, a transmission pinion is fixed on the other side of one guide plate shaft at the rear end of the liquid storage tank, the transmission pinion is engaged with a transmission gear wheel arranged on the upper end of the transmission pinion, the transmission gear wheel is arranged on the transmission extrusion shaft on the outer side of the detection disc, and the pulling plate mechanism is arranged on the two side walls at the rear part of the liquid storage tank.

[0021] The pulling plate mechanism comprises a mounting plate, two support plates, a lower shaft fixing block, an upper shaft fixing block, an upper pressing plate, a transmission extrusion roller, a transmission extrusion shaft, an extrusion roller, an extrusion shaft, an upper transmission gear, a lower transmission gear, a transmission sprocket, a main sprocket, a servo motor and a tracking photoelectric eye. The mounting plate is arranged on the two side walls at the rear of the liquid storage tank, the lower shaft fixing block and the upper shaft fixing block are sequentially connected by shafts between the two support plates on the same side from bottom to top, the upper end of the upper shaft fixing block is provided with the upper pressing plate on the two support plates on the same side, the middle part of the upper pressing plate is provided with an adjusting screw rod, the lower end of the adjusting screw rod is connected with the middle part of the upper shaft fixing block by a shaft, the upper end of the adjusting screw rod is provided with an upper pressing plate adjusting hand wheel, the middle parts of the upper shaft fixing block and the lower shaft fixing block are respectively provided with bearing seat holes, the transmission extrusion roller is provided with the transmission extrusion shaft extending to both sides at the middle part of the two ends, the extrusion roller is provided with the extrusion shaft extending to both sides at the middle part of the two ends, the transmission extrusion shaft is connected with the bearing seat hole of the corresponding lower shaft fixing block by a shaft at the two sides, the extrusion shaft is connected with the bearing seat hole of the corresponding upper shaft fixing block by a shaft at the two sides, the transmission extrusion shaft and the extrusion shaft on one side of the upper shaft fixing block and the lower shaft fixing block are respectively provided with the upper transmission gear and the lower transmission gear, the transmission sprocket is arranged on the transmission extrusion shaft on the same side of the lower transmission gear, the detection disc is arranged on the transmission extrusion shaft on the other side of the lower shaft fixing block, the tracking photoelectric eye is arranged on the support plate at the upper end of the detection disc, the transmission gear is arranged on the transmission extrusion shaft outside the detection disc, the transmission gear drives the transmission pinion to rotate, the shaft rod is arranged on the machine body at the lower end of the lower transmission gear, the tensioning synchronous sprocket is arranged on the shaft rod through a bearing shaft, the servo motor drives the transmission sprocket to rotate through the main sprocket and the chain, and the plate material passes between the transmission extrusion roller and the extrusion roller.

[0022] As a further description of the above technical scheme, the plate material feeding device is that the plate material roll is arranged on the gas expansion shaft, the machine body is provided with grooves at the lower end of the left side for clamping the two ends of the gas expansion shaft, a pair of feeding rollers are arranged on the bottom of the grooves in parallel by shafts, a feeding motor drives one feeding roller to rotate, the two ends of the gas expansion shaft are arranged between the upper ends of the two feeding rollers, the machine body is connected with the two sides of the plate feeding driving roller by shafts at the upper end of the right side, the machine body is connected with the two sides of the plate feeding driven roller by shafts at the upper end of the right side, the plate feeding driving roller and the plate feeding driven roller are connected by gears at one side, a plate feeding motor is arranged on the machine body at the lower end of the other side of the plate feeding driving roller to drive the plate feeding driving roller to rotate, a plate tracking photoelectric eye is arranged on the machine body between the outer sides of the plate feeding driving roller and the plate feeding driven roller, and the plate material led out from the plate material roll is pulled out from between the plate feeding driving roller and the plate feeding driven roller and enters the alkalization treatment device.

[0023] As a further description of the above technical solution: the hot pressing device is that the lower part of the frame body is provided with a support column, the upper end of the support column is provided with a supporting plate, the upper end of the supporting plate is provided with a lower top plate, the upper end of the frame body is provided with a hydraulic cylinder mounting plate, the middle part of the two sides of the hydraulic cylinder mounting plate is provided with two sliding guide sleeves at a distance, and a guide column is axially arranged in each of the two sliding guide sleeves; the lower end of the two guide columns is provided with a cross plate, the middle part of the lower end of the cross plate is provided with a mounting plate, the lower end of the mounting plate is provided with a lower pressing plate, the middle part of the lower pressing plate and the lower top plate is provided with a heating pipe at a distance, the hydraulic cylinder mounting plate between the two sliding guide sleeves is provided with two hydraulic cylinders at a distance, the cross plate at the lower end of the two hydraulic cylinders is provided with an axle seat, the lower end of the telescopic rod of each hydraulic cylinder is connected with the corresponding axle seat through a connecting shaft, and the plate material passes through the lower top plate.

[0024] As a further description of the above technical solution: the slitting device is composed of a longitudinal cutting mechanism and a transverse cutting mechanism, the longitudinal cutting mechanism is located at the front part of the machine body, and the transverse cutting mechanism is located at the rear part of the machine body.

[0025] The longitudinal cutting mechanism is that: a mounting plate is arranged on the machine body, two support plates are arranged at the two sides of the upper end of the mounting plate, bearing seat holes are arranged in the middle parts of the support plates, respectively, the two ends of a cutter shaft are connected with the corresponding bearing seat holes, respectively, input sprockets and output transmission sprockets are arranged at the two ends of the cutter shaft located outside the support plates, respectively, a plurality of cutter seats are arranged on the cutter shaft located inside the support plates at a distance, a slitting cutter is arranged on the middle part of the outer peripheral wall of each cutter seat, a connecting plate is arranged on the upper end of the two support plates, an axle seat mounting plate is arranged on the connecting plate, two front and rear through adjusting slides are arranged on the axle seat mounting plate, a plurality of telescopic axle seats are arranged in the adjusting slides of the axle seat mounting plate at a distance through fastening bolts, the middle part of a telescopic axle is arranged in the telescopic axle seat, a rotating pressing wheel is arranged on the lower end of the telescopic axle, an extension shaft adjusting hand wheel that can drive the telescopic axle to move up and down is arranged on the upper end of the telescopic axle, and the extension shaft adjusting hand wheel is used for adjusting the biting force between each slitting cutter and the corresponding rotating pressing wheel; each slitting cutter is held on the surface of the corresponding rotating pressing wheel, and a slitting servo motor drives the input sprocket to rotate in sequence through a transmission slitting sprocket and a transmission chain.

[0026] The transverse cutting mechanism is that: the outlet end of the longitudinal cutting mechanism is connected with the inlet end of the transverse cutting mechanism through a sliding plate, a lower mounting plate is arranged on the machine body, guide columns are arranged at the two side ends of the lower mounting plate, a lower cutter is arranged on the upper end of the lower mounting plate between the guide columns, the upper ends of the guide columns are connected with the two ends of a cylinder seat plate in an integrated manner through fixing nuts, a cutter cylinder is arranged on the upper end of the middle part of the cylinder seat plate, a cylinder telescopic rod of the cutter cylinder is connected with the upper end of the middle part of an upper cutter through a connecting plate, upper cutter mounting plates are arranged on the two sides of the upper cutter, guide column sleeves are arranged on the two sides of the upper cutter mounting plates, the guide column sleeves are arranged on the guide columns in a sleeved mode, so that the upper cutter can move up and down on the guide columns through the guide column sleeves, and the cutter teeth of the upper cutter and the cutter teeth of the lower cutter are in a shearing biting mode.

[0027] The present application has the following beneficial effects:

[0028] 1. The application adopts simple chemical means to remove only the amorphous matrix in the wood ray, retains the lignin skeleton structure and part of the cell morphology, forms a multi-level structure with a large number of pores, and obtains elastic wood based on wood ray structure modification. The wood-based elastic battery separator prepared by the application has a cycle life more than 100 times higher than that of a commercial glass fiber battery separator, which is better than most reported battery separators; compared with the commercial glass fiber battery separator, the conductivity is increased by more than 4 times, and the performance is good.

[0029] 2. The wood-based elastic battery separator preparation device provided by the application has reasonable design, strong mechanical property, can completely prepare the plate into a wood-based elastic battery separator, has the advantages of assembly line mechanical operation, labor saving, less labor, and high production efficiency.

[0030] 3. The preparation method provided by the application is simple and easy to operate, the raw materials are easy to obtain, and is suitable for mass production. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 The overall structure distribution schematic diagram of the battery separator manufacturing equipment of the application;

[0032] Figure 2 The structure schematic diagram of the material feeding device in the equipment of the application;

[0033] Figure 3 The structure schematic diagram of the alkali treatment device in the equipment of the application;

[0034] Figure 4 The structure schematic diagram of the Figure 3 A-A sectional structure schematic diagram in the equipment of the application;

[0035] Figure 5 The structure schematic diagram of the pulling plate mechanism in the equipment of the application;

[0036] Figure 6 The structure schematic diagram of the hot pressing device in the equipment of the application;

[0037] Figure 7 The structure schematic diagram of the longitudinal cutting mechanism in the equipment of the application;

[0038] Figure 8 The structure schematic diagram of the telescopic shaft seat part in the longitudinal cutting mechanism of the application;

[0039] Figure 9 The structure schematic diagram of the transverse cutting mechanism in the equipment of the application;

[0040] Figure 10 The structure schematic diagram of the electric control box in the equipment of the application;

[0041] Figure 11Elastic stress-strain diagrams for different tree species;

[0042] Figure 12 Electrochemical performance diagrams of elastic membranes for different tree species as separators for aqueous zinc-ion batteries;

[0043] Figure 13 Cycle life diagrams of wood elastomer separators of the present application and conventional glass fiber separators;

[0044] Figure 14 Impedance comparison diagrams of wood elastomer separators of the present application and conventional glass fiber separators. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. In order to make the technical means, creative features, purposes and effects achieved by the present application easy to understand, the present application will be further described below in combination with specific embodiments. However, the following embodiments are only preferred embodiments of the present application, and are not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application. The construction methods in the following embodiments are conventional methods, and the materials, devices and equipment used in the following embodiments are commercially available, unless otherwise specified.

[0046] Embodiment 1: As shown in the following, a method for manufacturing a battery separator by using a wood-based elastomer, comprising the following steps: Figures 1 to 14

[0047] (1) a device for manufacturing a battery separator;

[0048] (2) taking a tangential section of wood as a 1-2mm thick wood veneer;

[0049] (3) removing more than 80% of the matrix inside the ray structure of the wood veneer by using alkali treatment;

[0050] (4) cutting the treated wood veneer into the size of a battery separator by using a slitting device;

[0051] (5) adding electrolyte dropwise to soak the elastic separator, and then directly used for assembling a battery.

[0052] The wood can be any kind of wood. First, the wood is cut into equal length sections, and then each equal length section is tangentially cut into a 1-2mm thick equal width wood veneer strip by using a tangential cutting machine. Each equal width wood veneer strip (i.e. the board 10) is spliced end to end, and then rolled into a roll to form a board roll 11. In the device for manufacturing a battery separator, the board 10 roll is subjected to alkali treatment to remove more than 80% of the matrix inside the ray structure of the wood board roll, and the treated wood veneer is cut into the size of a battery separator by using a slitting device.​

[0053] The steps of removing the internal matrix of the ray structure of the log veneer by alkali treatment are as follows:

[0054] (1) Mix the log veneer with 10 wt% alkaline solution at a mass ratio of 1:50, stir at 90°C for 5-10 h, and after reaction, repeatedly wash with distilled water until the pH of the log veneer is neutral;

[0055] (2) Mix a pH-neutral wood veneer with a 2 wt% sodium hypochlorite solution at a mass ratio of 1:50, adjust the pH to 4.9 with glacial acetic acid, and heat and stir at 80-85°C for 5-10 hours. After the reaction is complete, add 5-8% ethanol by weight of the reaction solution to stop the reaction for 1-2 hours, remove the reaction solution, rinse with ultrapure water, and soak for 10-24 hours.

[0056] (3) freezing the soaked wood chips at -70°C for 5 h, and then placing them in a freeze dryer for 36 to 72 h to obtain a wood-based elastic diaphragm;

[0057] Alternatively, the moisture content of the soaked wood chips is controlled at 20%, and then hot-pressed at 60-170° C. and 1-25 MPa for 0.1-24 hours to obtain a wood-based elastic diaphragm.

[0058] The alkaline solution is any one of potassium hydroxide, sodium hydroxide and lithium hydroxide.

[0059] The electrolyte includes electrolytes used in metal / ion batteries such as lithium, sodium, and potassium, various aqueous batteries, or capacitors. The electrolyte is added dropwise using a conventional dropping method, and the immersion time does not exceed 5 minutes.

[0060] like Figure 1 As shown, the battery separator equipment includes a material feeding device 1, an alkali treatment device 2, a flushing device 3, a reaction treatment device 4, a reaction termination device 5, a soaking device 6, a hot pressing device 7, and a slitting device 8. The material feeding device 1 is located at the front end of the alkali treatment device 2, the rear end of the alkali treatment device 2 is connected to the front end of the flushing device 3, the front end of the reaction treatment device 4 is connected to the rear end of the flushing device, and the rear end of the reaction treatment device is sequentially provided with a reaction termination device, a soaking device, a hot pressing device, and a slitting device.

[0061] The plate roll 11 is guided by the material feeding device to the plate 10 into the alkali treatment device 2 to complete the alkali treatment of the plate, and then the plate is squeezed to expel the alkali liquid in the plate and is fed into the washing device 3 to complete the repeated washing of the plate to remove the alkali liquid, and then the plate is fed into the reaction treatment device 4 to perform the reaction treatment process of removing the matrix in the radial structure of the original wood veneer, and then the plate is squeezed to expel the reaction liquid in the plate and is fed into the reaction termination device 5 to terminate the reaction treatment, and then the plate is squeezed to expel the reaction termination liquid in the plate and is fed into the soaking device, and then the plate is repeatedly washed to remove the reaction termination liquid, and then the plate is squeezed to expel the water in the plate and is fed into the hot pressing device 7 to form the wood-based elastomer battery separator strip, and then the wood-based elastomer battery separator is cut into blocks by the cutting device 8.

[0062] As shown in Figure 10 , the electric control box 9 is located in the middle or one end of the machine body. The electric control box 9 is provided with a PLC controller, related control components and various operation circuit modules, and the outer end panel is provided with a control panel, a temperature control and other indicating tables 13, a touch screen 12, control buttons 14 and other control input components for program control, transmission control and coordinated control of information transmission of various mechanisms. The transmission control is the control of the position, speed and adjustment of the transmission of each mechanism device, so that there is good information communication transmission between each mechanism device, such as the control of the rotating speed of the feeding motor, the plate feeding motor, the servo motor and the cutting motor to realize the synchronous operation of the plate. In addition, sensors, tracking electric eyes, various tracking photoelectric eyes and photoelectric eye detection discs have good information feedback to the PLC controller, and the PLC controller controls the performance of the related components according to the feedback information. The control circuit is a traditional circuit, so it will not be repeated here.

[0063] As shown in Figure 1 and Figure 2 , the material feeding device 1 is that the plate roll 11 is located on the gas expansion shaft 104, the left lower end of the machine body 101 is provided with a groove for clamping the two ends of the gas expansion shaft 104, and a pair of feeding rollers 103 is arranged in parallel on the bottom of the groove. A feeding motor 102 drives one of the feeding rollers to rotate, and the two ends of the gas expansion shaft are located between the upper ends of the two feeding rollers. The right upper end of the machine body 101 is respectively connected with the two sides of the plate feeding driving roller 106, the upper ends of the two sides of the plate feeding driving roller 106 are respectively connected with the two sides of the plate feeding driven roller 107, the plate feeding driving roller 106 and the plate feeding driven roller 107 are toothed with each other through a gear on one side, the machine body on the other side of the lower end of the plate feeding driving roller is provided with a plate feeding motor 105 for driving the plate feeding driving roller to rotate, and the machine body between the outer sides of the plate feeding driving roller and the plate feeding driven roller is provided with a plate tracking photoelectric eye 108. The plate 10 guided from the plate roll is pulled out between the plate feeding driving roller and the plate feeding driven roller and enters the alkali treatment device 2.

[0064] When working, the controlled system is instructed to start the feeding roll motor 102 to drive the feeding roll 103 to rotate, the gas expansion shaft 104 to guide the plate roll 11 stored on the gas expansion shaft to the plate 10, the plate feeding motor 105 to drive the plate feeding driving roll to rotate clockwise and the plate feeding driven roll to rotate counterclockwise, the plate 10 to pass between the plate feeding driving roll and the plate feeding driven roll, the plate feeding driving roll and the plate feeding driven roll to pull the plate 10 to go up, the photoelectric eye 108 to track the color mark point of the plate 10 to adjust, information feedback, and the plate to be fed into the alkalization treatment device 2 according to the control system instruction to ensure that the plate is fed into the alkalization treatment device 2 completely, orderly and slowly for alkalization treatment.

[0065] As shown in Figure 1 , Figures 3 to 5 , the alkalization treatment device 2 is: the lower end of the strip-shaped liquid storage tank 211 is provided with a plurality of supporting legs 212 at intervals, the strip-shaped liquid storage tank 211 is provided with an alkaline solution, and the liquid surface of the alkaline solution is located at the lower end of the water spraying pipe 201. The middle part of the lower end surface of the strip-shaped liquid storage tank 211 is provided with a plurality of water return ports 213 at intervals, a plurality of water spraying pipes 201 are provided between the upper parts of the longitudinal two side walls of the liquid storage tank 211 at intervals, each water return port is communicated with the water inlet of the water pump 209 through a water return pipe 214, the water pump is located at one side of the lower end of the liquid storage tank, and the water outlet 210 of the water pump is communicated with each water spraying pipe 201 through a water outlet pipe. The outer wall of the lower end surface of the liquid storage tank is provided with a heater 215, preferably an electromagnetic heater, for heating the alkalization liquid in the liquid storage tank. A plurality of guide plate rollers 202 are provided between the middle parts of the longitudinal two side walls of the liquid storage tank at intervals, the plate 10 passes in front of each guide plate roller 202 at the lower end, so that the plate can be completely immersed in the alkalization liquid in the liquid storage tank. Each guide plate roller is located on the middle part of the guide plate shaft 203, the two sides of the guide plate shaft are connected to the corresponding side walls of the liquid storage tank through a sealed bearing pair 227, and one roller chain wheel 205 is fixed on the same side of the guide plate shaft which is extended outward on the two sides of the sealed bearing pair 227, respectively. The annular roller transmission chain 204 is sleeved on each roller chain wheel 205, so that each roller chain wheel drives each guide plate roller to rotate counterclockwise synchronously, and drives the plate to move slowly; the other side of the guide plate shaft 203 located at the rear end of the liquid storage tank is fixed with a transmission pinion 230, the transmission pinion 230 is engaged with a transmission gear 229 located at the upper end thereof, the transmission gear is located on the transmission extrusion shaft 228 outside the detection disc, and the two side walls at the rear part of the liquid storage tank are provided with a plate pulling mechanism.

[0066] As shown in Figure 4 and Figure 5As shown, the pulling plate mechanism comprises a mounting plate 232, two support plates 208, a lower shaft fixing block 231, an upper shaft fixing block 226, an upper pressing plate 224, a transmission squeezing roller 222, a transmission squeezing shaft 228, a squeezing roller 223, a squeezing shaft 225, an upper transmission gear 206, a lower transmission gear 220, a transmission sprocket 207, a main sprocket 219, a servo motor 217, and a tracking photoelectric eye 233. The mounting plate 232 is located on the two side walls at the rear of the liquid storage tank 211. The lower shaft fixing block 231 and the upper shaft fixing block 226 are sequentially connected by shafts between the two support plates on the same side from bottom to top. The upper end of the upper shaft fixing block 226 is provided with the upper pressing plate 224 on the same side of the two support plates 208. The middle part of the upper pressing plate 224 is screwed with an adjusting screw, the lower end of the adjusting screw is connected with the middle part of the upper shaft fixing block by a shaft, and the upper end of the adjusting screw is provided with an upper pressing plate adjusting hand wheel 221. Rotating the upper pressing plate adjusting hand wheel 221 can drive the adjusting screw to rise or fall in the middle part of the upper pressing plate 224, so that the upper shaft fixing block also rises or falls along the two support plates, thereby adjusting the gap between the squeezing roller 223 and the transmission squeezing roller 222. The plate material passes through the gap between the squeezing roller 223 and the transmission squeezing roller 222 to complete the squeezing and pulling of the liquid in the plate material. The middle parts of the upper shaft fixing block and the lower shaft fixing block are respectively provided with bearing seat holes, the middle parts of the two ends of the transmission squeezing roller 222 are respectively provided with transmission squeezing shafts 228 extending to both sides, the middle parts of the two ends of the squeezing roller 223 are respectively provided with squeezing shafts 225 extending to both sides, the transmission squeezing shafts on both sides are respectively connected with the bearing seat holes of the corresponding lower shaft fixing block by shafts, and the squeezing shafts on both sides are respectively connected with the bearing seat holes of the corresponding upper shaft fixing block by shafts. The transmission squeezing shaft 228 and the squeezing shaft 225 on one side of the upper and lower shaft fixing blocks are respectively provided with the upper transmission gear 206 and the lower transmission gear 220. The transmission sprocket 207 is arranged on the transmission squeezing shaft on the same side of the lower transmission gear. The detection disc is arranged on the transmission squeezing shaft on the other side of the lower shaft fixing block. The other tracking photoelectric eye 233 is arranged on the support plate at the upper end of the detection disc. The transmission large gear 229 is arranged on the transmission squeezing shaft outside the detection disc to drive the transmission pinion 230 to rotate. The shaft rod is arranged on the body at the lower end of the lower transmission gear 220. The tensioning synchronous sprocket 216 is arranged on the shaft rod through the bearing shaft to adjust the tightness of the chain 218. The servo motor 217 drives the transmission sprocket 207 to rotate through the main sprocket 219 and the annular chain 218. The plate material passes through the gap between the transmission squeezing roller and the squeezing roller.

[0067] The pulling plate mechanism is arranged at the rear upper end of the alkali treatment device 2, the washing device 3, the reaction treatment device 4, the reaction termination device 5, the soaking device 6, the hot pressing device 7, and the rear end of the longitudinal cutting mechanism of the splitting device, serving as the power source for the plate material to move forward.

[0068] When working, the tracking photoelectric eye 233 controlled by the PLC controller reads the detection disc data to control the servo motor 217 to run synchronously with the feeding motor and the plate feeding motor. The servo motor 217 drives the transmission sprocket 207 through the main sprocket 219 and the annular chain 218, and then drives the lower transmission gear 220 and the transmission gear 229 through the transmission extrusion shaft 228, so that the transmission upper gear meshing with the lower transmission gear 220 rotates in the same direction, and then the transmission extrusion roller and the extrusion roller also rotate in the same direction. The plate 10 passes between the transmission extrusion roller and the extrusion roller, and the plate is pulled forward slowly in the liquid tank, and the plate separated from the liquid tank 211 extrudes the alkali solution back into the liquid tank 211 for reuse. At the same time, the transmission gear 229 drives the transmission pinion 230 meshing therewith to rotate counterclockwise, the transmission pinion 230 drives the guide plate shaft 203 and the guide plate roller 202 to rotate counterclockwise, and the other guide plate rollers 202 are synchronously driven to rotate counterclockwise through the roller sprocket 205 and the annular roller transmission chain 204 on the other side of the guide plate shaft. Since the plate 10 moves forward from the lower end of each guide plate roller 202, the plate can be completely immersed in the alkali solution in the liquid tank, and the guide plate mechanism drives the plate to move forward slowly in the liquid tank. At the same time, the water pump 209 starts to pump the alkali solution in the liquid tank out of each water return port through the water return pipe 214, and then press out through the water outlet pipe of the water pump and then spray out from each water spray pipe 201, forming a circulating water to speed up the alkali treatment of the plate in the liquid tank. The heater 215 on the outer wall of the lower end surface of the liquid tank completes the heating of the liquid tank. The temperature control sensor, analysis sensor and the like provided in the liquid tank have good information feedback to the PLC controller, and the PLC controller controls the performance of the related parts according to the feedback information and displays, and automatically controls the heating or prompts the operation. The control circuit is a traditional circuit.

[0069] The rotating upper pressing plate adjusting hand wheel 221 can drive the adjusting screw to rise or fall in the middle of the upper pressing plate 224, so that the upper shaft fixed block also rises or falls between the two support plates, thereby adjusting the gap between the extrusion roller 223 and the transmission extrusion roller 222. The plate passes between the extrusion roller 223 and the transmission extrusion roller 222, and the liquid in the plate is extruded and the plate is pulled forward.

[0070] As shown in Figure 1 , the flushing device 3 is located at the rear end of the alkali treatment device 2, and is used for repeatedly washing the plate after alkali treatment to neutralize the pH of the wood veneer. Therefore, the structure of the flushing device 3 is the same as that of the alkali treatment device 2, and will not be repeated here, but the liquid in the liquid tank is distilled water.

[0071] The reaction treatment device 4 is located at the rear end of the flushing device 3 and is used to perform reaction treatment on the pH-neutral plate. Therefore, the structure of the reaction treatment device 4 is the same as that of the alkali treatment device 2 and will not be repeated here. However, the liquid in the liquid storage tank is the reaction liquid (i.e., the pH-neutral plate is mixed with a 2 wt% sodium hypochlorite solution in a mass ratio of 1:50, the pH is adjusted to 4.9 with glacial acetic acid, and then heated and stirred at 80-85°C).

[0072] The termination reaction device 5 is located at the rear end of the reaction treatment device 4 and is used to terminate the reaction of the plate after the reaction treatment. Therefore, the structure of the termination reaction device is the same as that of the alkali treatment device 2, so it will not be repeated. However, the liquid in the liquid storage tank is the termination reaction liquid (ethanol accounting for 5 to 8% of the mass of the reaction liquid is added to stop the reaction process).

[0073] The soaking device 6 is located at the rear end of the termination reaction device 5 and is used to soak the plate after the reaction treatment to remove the internal matrix. Therefore, the structure of the flushing device 3 is the same as that of the alkali treatment device 2, so it will not be repeated. However, the liquid storage tank should be larger than the liquid storage tank of the alkali treatment device 2, and the liquid therein is ultrapure water, such as distilled water.

[0074] like Figure 6 As shown, the hot pressing device 7 is located at the rear of the soaking device 6. The pulling plate mechanism squeezes out the moisture in the board passing through the rear of the soaking device 6 and sends it into the hot pressing device 7 for hot pressing and drying to form a wood-based elastomer battery diaphragm strip material.

[0075] The hot pressing device 7 comprises: a support 714 is provided at the lower portion of a frame 709, a support plate 713 is provided at the upper end of the support plate, a lower top plate 712 is provided at the upper end of the support plate, a hydraulic cylinder mounting plate 705 is provided at the upper end of the frame 709, two sliding guide sleeves 702 are provided at a distance in the middle of both sides of the hydraulic cylinder mounting plate 705, and a guide pillar 703 is axially mounted in each of the two sliding guide sleeves 702. A cross plate 706 is provided at the lower end of the two guide pillars, a mounting plate 701 is provided at the middle of the lower end of the cross plate 706, a lower pressing plate 710 is provided at the lower end of the mounting plate 701, and a plurality of heating tubes 711 are provided at a distance in the middle of the lower pressing plate 710 and the lower top plate 712 for heating the lower pressing plate 710 and the lower top plate 712. The heating tubes can be electromagnetic heating tubes, and the heating temperature is automatically controlled by a PLC controller after reading the temperature control sensor on the lower pressing plate 710 or the lower top plate 712. Two hydraulic cylinders 704 are spaced apart on a hydraulic cylinder mounting plate 705 between the two sliding guide sleeves. These two hydraulic cylinders 704 are controlled by a PLC controller. Axle seats 708 are located on the crossbar 706 at the lower ends of the two hydraulic cylinders 704. The lower ends of the telescopic rods 707 of each hydraulic cylinder are axially connected to their corresponding axle seats via connecting shafts. A pull plate mechanism is located at the upper rear end of the hot press 7, serving as a power source for advancing the sheet metal. Sheet metal 10 passes over the lower top plate.

[0076] During operation, the pull plate mechanism pulls the sheet material 10 between the lower top plate and the upper pressure plate 710. Two hydraulic cylinders 704, via their telescopic rods 707 and connecting shafts, drive the cross plate 706 downward through the sliding guide sleeve 702 along the guide column 703, pressing the lower end surface of the upper pressure plate 710 against the upper end surface of the lower top plate, achieving heat pressing and drying of the sheet material, forming a wood-based elastomer battery separator strip. The connecting shaft then drives the cross plate 706 upward through the sliding guide sleeve 702 along the guide column 703, separating the lower end surface of the upper pressure plate 710 from the upper end surface of the lower top plate. The wood-based elastomer battery separator strip is guided by the pull plate mechanism, located at the upper rear end of the hot pressing device 7, to the front end of the slitting device. The two hydraulic cylinders, controlled by a PLC, achieve heat pressing and drying of the sheet material.

[0077] like Figures 7 to 9 As shown, the slitting device 8 is composed of a longitudinal cutting mechanism and a transverse cutting mechanism. The longitudinal cutting mechanism is located at the front of the machine body 811, and the transverse cutting mechanism is located at the rear of the machine body.

[0078] like Figure 7 and Figure 8As shown, the longitudinal cutting mechanism is that the body 811 is provided with a mounting plate 805, two support plates 818 are respectively located at the upper ends of the two sides of the mounting plate 805, the middle parts of the support plates 818 are respectively provided with bearing seat holes 819, and the two ends of the cutter shaft 803 are respectively shaft-connected in the corresponding bearing seat holes 819. The two ends of the cutter shaft located outside the support plate are respectively provided with an input sprocket 804 and an output transmission sprocket 820, the cutter shaft 803 located inside the support plate is provided with a plurality of cutter seats 801 at intervals, the outer peripheral wall of the cutter seat 801 is provided with a slitting cutter 802 at the middle part, the distance between the adjacent slitting cutters is the width of a wood-based elastomer battery separator. The upper ends of the two support plates are provided with a connecting plate 814, the connecting plate 814 is provided with a shaft seat mounting plate 813, the shaft seat mounting plate 813 is provided with two front and rear through adjustment slides 810, a plurality of expansion shaft seats 815 are arranged at intervals in the adjustment slides 810 of the shaft seat mounting plate through fastening bolts 809, so as to facilitate setting the number of expansion shaft seats 815 and the width of two adjacent expansion shaft seats 815 according to the width of the battery separator. The middle part of the expansion shaft 817 is arranged in the expansion shaft seat 815, the lower end of the expansion shaft 817 is provided with a rotating pressure roller 812, the upper end of the expansion shaft 817 is provided with an expansion shaft adjusting hand wheel 816 which can drive the expansion shaft to move up and down, for adjusting the biting force between each slitting cutter and the corresponding rotating pressure roller. Each slitting cutter is held on the surface of the corresponding rotating pressure roller 812, and the slitting servo motor 807 drives the input sprocket 804 to rotate clockwise through the transmission slitting sprocket 808 and the transmission chain 806. Another pulling plate mechanism is located on the body at the rear end of the cutter seat, the pulling plate mechanism drives the transmission large gear 229 on one side of the transmission extrusion shaft 228 of the transmission extrusion roller 222 to be replaced by an input transmission sprocket 820, the output transmission sprocket 820 drives the input transmission sprocket through another ring chain, and then drives the transmission extrusion roller 222 to rotate clockwise, the plate material passes between the transmission extrusion roller 222 and the extrusion roller 223, and the wood-based elastomer battery separator strip material after longitudinal cutting is pulled into the transverse cutting mechanism.

[0079] When working, the slitting servo motor 807 is controlled by the PLC controller, the slitting servo motor 807 drives the input chain wheel 804 to rotate clockwise through the transmission slitting chain wheel 808 and the transmission chain 806, the input chain wheel 804 drives the output transmission chain wheel 820, the knife shaft 803 and the several knife holders 801 arranged at intervals to rotate clockwise, each slitting knife 802 drives each rotating press wheel 812 engaged therewith to rotate counterclockwise. Since the slitting knife 802 and the rotating press wheel 812 are the longitudinal cutting mechanism for the wood-based elastomer battery separator strip material between them, that is, the longitudinal cutting mechanism for the wood-based elastomer battery separator strip material at the preset position between them, each slitting knife and the rotating press wheel and the wood-based elastomer battery separator strip material at the preset position between them are dragged by the slitting knife and the rotating press wheel and the pulling plate mechanism, enter between each slitting knife and the rotating press wheel, and each rotating press wheel cooperates with the slitting knife to complete the longitudinal cutting of the wood-based elastomer battery separator strip material into each one membrane width battery separator.

[0080] As shown in Figure 9 The cross-cutting mechanism is: the outlet end of the longitudinal cutting mechanism is connected to the inlet end of the cross-cutting mechanism through a sliding plate, and a pulling mechanism is arranged at the rear side of the outlet end of the longitudinal cutting mechanism, so that the wood-based elastomer battery separator strip material after longitudinal cutting can enter the inlet end of the cross-cuting mechanism. The lower mounting plate 826 is arranged on the machine body 811, the guide columns 822 are arranged at both sides of the lower mounting plate, the lower cutter 825 is arranged at the upper end of the lower mounting plate between the guide columns 822, the upper ends of the guide columns are connected to the both ends of the cylinder seat plate 828 through fixing nuts, the cutter cylinder 831 is arranged at the upper end of the middle part of the cylinder seat plate, the cutter cylinder 831 is controlled by the PLC controller, the cylinder telescopic rod 830 of the cutter cylinder 831 is connected to the upper end of the middle part of the upper cutter 823 through the connecting plate 829, the upper cutter mounting plate 824 is arranged at both sides of the upper cutter, the guide column shaft sleeve 821 is arranged at both sides of the upper cutter mounting plate, the guide column shaft sleeve 821 is arranged on the guide column 822, so that the upper cutter 823 can move up and down on the guide column through the guide column shaft sleeve, and the cutter teeth of the upper cutter and the cutter teeth of the lower cutter are in shearing engagement.

[0081] When working, the wood-based elastomer battery separator strip material after longitudinal cutting enters between the upper cutter 823 and the lower cutter 825, the cylinder telescopic rod 830 of the cutter cylinder 831 drives the upper cutter 823 to run up and down quickly along the guide column shaft sleeve 821 through the connecting plate and the guide column 822, and drives the cutter teeth of the upper cutter and the cutter teeth of the lower cutter to cut the entering battery separator strip material transversely at a length of one battery separator, to form several complete finished battery separators. The finished battery separators are soaked in electrolyte before use to soak the elastic separator.

[0082] The cutter cylinder is provided with a gas source by a gas supply machine controlled by the PLC controller or an electric cutter cylinder controlled by the PLC controller.

[0083] Example 2: Different from Example 1, balsa wood was used as the elastic diaphragm of the button zinc ion battery, including the following steps:

[0084] The balsa wood thin plate with a 1 mm thick tangential section was mixed with 5 wt% alkaline solution at a mass ratio of 1:50, and stirred at 90°C for 6 h. After the reaction, the wood pieces were repeatedly washed with distilled water until the pH of the wood pieces was neutral. The wood pieces with neutral pH were mixed with 2 wt% sodium hypochlorite solution at a mass ratio of 1:50, the pH was adjusted to 4.9 with glacial acetic acid, and then heated and stirred at 85°C for 10 h. After the reaction was completed, 10 mL of ethanol was added, the reaction was stopped for 1-2 h, the reaction liquid was removed, and then the wood pieces were soaked in ultrapure water for 24 h. The clean wood pieces were hot-pressed at 60-170°C and 1-25 MPa for 0.1-24 h to obtain a balsa wood-based elastic diaphragm. A button battery was assembled with a zinc sheet with a diameter of 14 mm as the negative electrode, V2O5 with a diameter of 14 mm as the positive electrode, and the balsa wood-based elastic diaphragm with a diameter of 19 mm as the diaphragm.

[0085] The rest of the equipment including the battery diaphragm used was the same as that of Example 1, and thus will not be repeated.

[0086] Example 3: Poplar was used as the aqueous zinc ion battery elastic diaphragm, including the following steps:

[0087] The poplar thin plate with a 2 mm thick tangential section was mixed with 10 wt% alkaline solution at a mass ratio of 1:50, and stirred at 90°C for 10 h. After the reaction, the wood pieces were repeatedly washed with distilled water until the pH of the wood pieces was neutral. The wood pieces with neutral pH were mixed with 3 wt% sodium hypochlorite solution at a mass ratio of 1:50, the pH was adjusted to 4.9 with glacial acetic acid, and then heated and stirred at 85°C for 24 h. After the reaction was completed, 10 mL of ethanol was added, the reaction was stopped for 1-2 h, the reaction liquid was removed, and then the wood pieces were soaked in ultrapure water for 24 h. The clean wood pieces were hot-pressed at 60-170°C and 1-25 MPa for 0.1-24 h to obtain a poplar-based elastic diaphragm. A button battery was assembled with a zinc sheet with a diameter of 14 mm as the negative electrode, V2O5 with a diameter of 14 mm as the positive electrode, and the poplar-based elastic diaphragm with a diameter of 19 mm as the diaphragm.

[0088] The rest of the equipment including the battery diaphragm used was the same as that of Example 1, and thus will not be repeated.

[0089] Example 4: Elm was used as the lithium ion battery elastic diaphragm, including the following steps:

[0090] The basswood thin plate with a chord section of 1 mm thick is cut, basswood pieces are mixed with 10 wt% alkaline solution at a mass ratio of 1:50, and stirred at 90°C for 10 h. After the reaction, the wood pieces are repeatedly washed with distilled water until the pH of the wood pieces is neutral, the wood pieces with a neutral pH are mixed with 3 wt% sodium hypochlorite solution at a mass ratio of 1:50, the pH is adjusted to 4.9 by using glacial acetic acid, and then heated and stirred at 85°C for 30 h. After the reaction is completed, 10 mL of ethanol is added, the reaction is stopped for 1-2 h, the reaction solution is discharged, and then soaked in ultrapure water for 24 h. The clean wood pieces are hot-pressed at 60-170°C, 1-25 MPa for 0.1-24 h to obtain basswood-based elastic diaphragm. A lithium sheet with a diameter of 14 mm is used as a positive electrode, graphite with a diameter of 14 mm is used as a negative electrode, and the basswood-based elastic body with a diameter of 17 mm is used as a diaphragm to assemble a button cell.

[0091] The rest of the equipment including the battery diaphragm used is the same as that of Example 1, and is not repeated.

[0092] Example 5: Almond as a sodium ion battery elastic diaphragm, including the following steps:

[0093] The basswood thin plate with a chord section of 1 mm thick is cut, basswood pieces are mixed with 10 wt% alkaline solution at a mass ratio of 1:50, and stirred at 90°C for 10 h. After the reaction, the wood pieces are repeatedly washed with distilled water until the pH of the wood pieces is neutral, the wood pieces with a neutral pH are mixed with 3 wt% sodium hypochlorite solution at a mass ratio of 1:50, the pH is adjusted to 4.9 by using glacial acetic acid, and then heated and stirred at 85°C for 24 h. After the reaction is completed, 10 mL of ethanol is added, the reaction is stopped for 1-2 h, the reaction solution is discharged, and then soaked in ultrapure water for 24 h. The clean wood pieces are hot-pressed at 60-170°C, 1-25 MPa for 0.1-24 h to obtain basswood-based elastic diaphragm. A lithium sheet with a diameter of 14 mm is used as a positive electrode, graphite with a diameter of 14 mm is used as a negative electrode, and the basswood-based elastic body with a diameter of 17 mm is used as a diaphragm to assemble a button cell.

[0094] Figure 11 The stress-strain diagram of the elastic body of different tree species of the embodiment of the application. Due to different ray structures, a series of wood-based elastic bodies with different elastic deformations are successfully prepared, among which basswood shows greater strain capacity under the same stress, followed by almond.

[0095] Figure 12 The electrochemical performance diagram of the elastic diaphragm of different tree species of the application as an aqueous zinc ion battery diaphragm. The electrochemical performance is directly related to the elastic capacity, and basswood shows the best electrochemical performance.

[0096] Figure 13For the cycle life comparison of the balsa elastomer separator in the embodiment 2 of the present application and the traditional glass fiber separator, the cycle life of the balsa elastomer separator can reach 1169 hours, far superior to the commercial glass fiber separator, with great application prospect, compared with 76 hours of the traditional glass fiber separator.

[0097] Figure 14 For the impedance comparison chart of the balsa elastomer separator in the embodiment 2 of the present application and the traditional glass fiber separator, the electrical conductivity of the balsa elastomer is far superior to the traditional glass fiber separator.

[0098] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art in the technical range disclosed by the present application, according to the technical scheme and the inventive concept of the present application, equivalent replacement or change, should be covered in the protection scope of the present application.

Claims

1. A method for making a battery separator using a wood-based elastomer, characterized in that: The steps include: (1) Equipment for preparing battery separators; (2) Take a log veneer with a 1-2 mm thick tangential section; (3) Using alkali treatment to remove more than 80% of the matrix inside the ray structure of the log veneer; the steps of removing the matrix inside the ray structure of the log veneer by alkali treatment are: (a) mixing a log veneer with a 10 wt% alkaline solution at a mass ratio of 1:50, stirring at 90°C for 5-10 hours, and repeatedly washing the veneer with distilled water until the pH of the veneer is neutral. The alkaline solution is any one of potassium hydroxide, sodium hydroxide, and lithium hydroxide. (b) Mixing a pH-neutral wood veneer with a 2 wt% sodium hypochlorite solution at a mass ratio of 1:50, adjusting the pH to 4.9 with glacial acetic acid, and heating and stirring at 80-85°C for 5-10 hours. After the reaction, adding 5-8% ethanol by weight of the reaction solution to stop the reaction for 1-2 hours, draining the reaction solution, rinsing with ultrapure water, and then soaking for 10-24 hours. (c) controlling the moisture content of the soaked wood chips to 20%, and hot pressing the wood chips at 60 to 170° C. and 1 to 25 MPa for 0.1 to 24 hours to obtain a wood-based elastic diaphragm; (4) cutting the treated wood veneer into battery separator sizes using a slitting device; (5) dripping an electrolyte to wet the elastic diaphragm, which is then directly used to assemble a battery. The electrolyte includes electrolytes used in lithium, sodium, potassium metal / ion batteries, various aqueous batteries, or capacitors.

2. The method for producing a battery separator using a wood-based elastomer according to claim 1, characterized in that: The wood can be any kind of wood. The wood is first cut into equal-length sections, and then a tangential cutting machine is used to tangentially cut each equal-length section into equal-width log veneers with a thickness of 1 to 2 mm. The equal-width log veneers are glued end to end to form a board roll. In the battery separator equipment, the board roll is subjected to an alkali treatment to remove more than 80% of the internal matrix of the log board roll's ray structure, and a slitting device is used to cut the treated wood veneer into the required battery separator size.

3. The method for producing a battery separator using a wood-based elastomer according to claim 1, wherein: The electrolyte is added dropwise using a conventional dropping method, and the soaking time does not exceed 5 minutes.

4. A device for producing battery separators using wood-based elastomers, characterized in that: The device is a device for implementing the method according to claim 1, comprising a material feeding device, an alkali treatment device, a washing device, a reaction treatment device, a reaction termination device, a soaking device, a hot pressing device, and a slitting device; The material feeding device is located at the front end of the alkali treatment device, the rear end of the alkali treatment device is connected to the front end of the washing device, the front end of the reaction treatment device is connected to the rear end of the washing device, and the rear end of the reaction treatment device is sequentially provided with a terminating reaction device, a soaking device, a hot pressing device, and a slitting device; The sheet roll is guided out of the sheet through the feeding device and enters the alkali treatment device to complete the alkali treatment of the sheet, and then the alkali in the sheet is hydraulically squeezed out through the pulling plate mechanism and sent to the washing device. After the sheet is repeatedly washed to remove the alkali solution, it enters the reaction treatment device to carry out the reaction treatment process of removing the internal matrix of the ray structure of the log thin plate, and the reaction liquid in the sheet is hydraulically squeezed out through the pulling plate mechanism and sent to the termination reaction device for termination reaction treatment, and the termination reaction liquid in the sheet is hydraulically squeezed out through the pulling plate mechanism and sent to the soaking device. After the sheet is repeatedly washed to remove the termination reaction liquid, the moisture in the sheet is squeezed out through the pulling plate mechanism and sent to the hot pressing device to form a wood-based elastomer battery diaphragm strip material, and finally cut longitudinally and transversely through the slitting device to form a block of wood-based elastomer battery diaphragm; The alkali treatment device is as follows: a plurality of return water ports are provided at intervals in the middle of the lower end face of the strip-shaped liquid storage tank, a plurality of spray pipes are provided at intervals between the upper parts of the longitudinal side walls of the liquid storage tank, each return water port is communicated with the water inlet of the water pump through the return water pipe, the water pump is located on one side of the lower end of the liquid storage tank, the water outlet of the water pump is communicated with each spray pipe through the outlet pipe, a heater is provided on the outer wall of the lower end face of the liquid storage tank, a plurality of guide rollers are provided at intervals between the middle parts of the longitudinal side walls of the liquid storage tank, and the plate is moved from each The lower end of the guide roller moves forward, and each guide roller is located on the middle part of the guide shaft. The two sides of the guide shaft are connected to the corresponding side walls of the liquid storage tank through a sealed bearing subshaft, and a roller sprocket is fixed on the guide shaft on one side of the extension. The annular roller transmission chain is sleeved on each roller sprocket. A transmission pinion is fixed on the other side of a guide shaft located at the rear end of the liquid storage tank. The transmission pinion is engaged with the transmission gear located at its upper end. The transmission gear is located on the transmission extrusion shaft outside the detection disk. A pulling plate mechanism is provided on both side walls of the rear of the liquid storage tank. The pulling plate mechanism includes a mounting plate, two support plates, a lower shaft fixing block, an upper shaft fixing block, an upper pressure plate, a transmission extrusion roller, a transmission extrusion shaft, an extrusion roller, an extrusion shaft, an upper transmission gear, a lower transmission gear, a transmission sprocket, a main sprocket, a servo motor, and a tracking photoelectric eye; the mounting plate is located on the two side walls at the rear of the liquid storage tank, and the lower shaft fixing block and the upper shaft fixing block are axially connected between the two support plates on the same side from bottom to top, and an upper pressure plate is respectively provided on the two support plates on the same side of the upper end of the upper shaft fixing block, and an adjusting screw is screwed in the middle of the upper pressure plate, and the lower end of the adjusting screw is axially connected to the middle of the upper shaft fixing block, and an upper pressure plate adjusting handwheel is provided at the upper end of the adjusting screw, and bearing seat holes are respectively provided in the middle of the upper shaft fixing block and the lower shaft fixing block, and transmission extrusion shafts extending to both sides are respectively provided in the middle of the two ends of the transmission extrusion roller, and There is an extrusion shaft extending to both sides, and the two sides of the transmission extrusion shaft are respectively connected to the bearing seat holes of the corresponding lower shaft fixing block, and the two sides of the extrusion shaft are respectively connected to the bearing seat holes of the corresponding upper shaft fixing block. The transmission extrusion shaft and the extrusion shaft on one side of the upper and lower shaft fixing blocks are respectively provided with an upper transmission gear and a lower transmission gear. The transmission extrusion shaft on the same side as the lower transmission gear is provided with a transmission sprocket, and the transmission extrusion shaft on the other side of the lower shaft fixing block is provided with a detection disk. The tracking photoelectric eye is located on the support plate at the upper end of the detection disk. The transmission extrusion shaft outside the detection disk is provided with a transmission large gear that drives the transmission small gear to rotate. A shaft rod is provided on the body at the lower end of the lower transmission gear, and a tensioning synchronous sprocket is provided on the shaft rod through the bearing shaft. The servo motor drives the transmission sprocket to rotate through the main sprocket and the chain, and the plate passes between the transmission extrusion roller and the extrusion roller.

5. The device according to claim 4, characterized in that The material feeding device is as follows: the plate roll is located on the air expansion shaft, and grooves for the two ends of the air expansion shaft are provided on both sides of the lower left end of the machine body, and a pair of feeding rollers are provided side by side at the bottom of the grooves. The feeding motor drives a feeding roller to rotate, and the two ends of the air expansion shaft are placed between the upper ends of the two feeding rollers. The two sides of the upper right end of the machine body are respectively connected to the two sides of the feeding plate active roller, and the two sides of the upper end of the feeding plate active roller are respectively connected to the two sides of the feeding plate driven roller on the machine body. The feeding plate active roller and the feeding plate driven roller are geared to each other on one side through gears, and a feeding motor that drives the feeding plate active roller to rotate is provided on the machine body located at the lower end of the other side of the feeding plate active roller, and a plate tracking photoelectric eye is provided on the machine body between the outer sides of the feeding plate active roller and the feeding plate driven roller. The plate led out from the plate roll is pulled out from between the feeding plate active roller and the feeding plate driven roller and enters the alkalization treatment device.

6. The device according to claim 4, characterized in that The hot pressing device is as follows: a support is provided at the lower part of the frame, a support plate is provided at the upper end of the support plate, a lower top plate is provided at the upper end of the support plate, a hydraulic cylinder mounting plate is provided at the upper end of the frame, two sliding guide sleeves are provided at a distance in the middle of both sides of the hydraulic cylinder mounting plate, and a guide column is axially arranged in each of the two sliding guide sleeves; a cross plate is provided at the lower end of the two guide columns, a mounting plate is provided at the middle of the lower end of the cross plate, a lower pressure plate is provided at the lower end of the mounting plate, a heating tube is provided at a distance in the middle of the lower pressure plate and the lower top plate, two hydraulic cylinders are provided at a distance on the hydraulic cylinder mounting plate between the two sliding guide sleeves, an axle seat is provided on the cross plate at the lower end of the two hydraulic cylinders, the lower end of the telescopic rod of each hydraulic cylinder is axially connected to the corresponding axle seat through a connecting shaft, and the plate passes through the lower top plate.

7. The device according to claim 4, characterized in that The slitting device is composed of a longitudinal cutting mechanism and a transverse cutting mechanism, the longitudinal cutting mechanism is located at the front of the machine body, and the transverse cutting mechanism is located at the rear of the machine body; The longitudinal cutting mechanism is as follows: a mounting plate is provided on the machine body, two support plates are respectively located on both sides of the upper end of the mounting plate, a bearing seat hole is respectively provided in the middle of the support plate, the two ends of the knife shaft are respectively connected to the corresponding bearing seat holes, the two ends of the knife shaft located on the outer side of the support plate are respectively provided with an input sprocket and an output transmission sprocket, a plurality of knife seats are provided on the knife shaft located on the inner side of the support plate at intervals, a slitting knife is provided on the middle part of the outer peripheral wall of the knife seat, a connecting plate is provided on the upper end of the two support plates, a shaft seat mounting plate is provided on the connecting plate, and two front The adjustment slide is passed through at the rear, and a number of telescopic shaft seats are provided in the adjustment slide of the shaft seat mounting plate at intervals through fastening bolts. The middle shaft of the telescopic shaft is provided in the telescopic shaft seat, and the lower end shaft of the telescopic shaft is provided with a rotating pressure wheel. The upper end shaft of the telescopic shaft is provided with a telescopic shaft adjustment handwheel that can drive the telescopic shaft to move up and down, which is used to adjust the bite force between each slitting knife and the corresponding rotating pressure wheel. Each slitting knife is held on the wheel surface of the corresponding rotating pressure wheel, and the slitting servo motor drives the input sprocket to rotate clockwise through the transmission slitting sprocket and the transmission chain; The cross-cutting mechanism is as follows: the outlet end of the longitudinal cutting mechanism is connected to the inlet end of the cross-cutting mechanism through a slide, a lower mounting plate is provided on the body, guide columns are provided on both side ends of the lower mounting plate, a lower cutter is provided on the upper end of the lower mounting plate between the guide columns, the upper end of the guide column is connected to the two ends of the cylinder base plate through a fixing nut, a cutter cylinder is provided in the middle of the upper end of the cylinder base plate, the cylinder telescopic rod of the cutter cylinder is connected to the middle of the upper end of the upper cutter through a connecting plate, an upper cutter mounting plate is provided on both sides of the upper cutter, guide column bushings are provided on both sides of the upper cutter mounting plate, the guide column bushing shaft is provided on the guide column, so that the upper cutter can be moved up and down on the guide column through the guide column bushing, and the teeth of the upper cutter and the teeth of the lower cutter are scissor-shaped.

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