Equipment and method for manufacturing battery diaphragm by using wood-based elastomer

Abstract

The invention belongs to equipment and a method for manufacturing a battery diaphragm by using a wood-based elastomer. The method comprises the following steps: preparing the equipment of the battery diaphragm; a log thin plate with the tangential section of wood being 1-2 mm thick is taken; 80% or above of matrixes in the ray structure of the log thin plate are removed through alkali treatment; cutting the processed wood sheet into the size of the battery diaphragm by using a cutting device; the electrolyte is dropwise added to infiltrate the elastic diaphragm, and the diaphragm can be directly used for assembling a battery. The equipment comprises a material feeding device, an alkali treatment device, a flushing device, a reaction treatment device, a reaction termination device, a soaking device, a hot pressing device and a slitting device. The invention has the advantages of green environmental protection, long service life, excellent performance, low cost, high mechanization degree, simplicity and feasibility.

Description

Technical Field

[0001] The invention relates to a device and a method for manufacturing a battery separator by 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 freely, but allow 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 diversified, so the demand for batteries with high safety, high energy density and long cycle life is also rising. As the "safety valve" of the battery, the diaphragm is the key to determining the safety of the battery. The performance of the battery diaphragm determines the key characteristics of the battery, such as capacity, cycle performance, and charge and discharge current density. The battery diaphragm belongs to the high-tech industry that the country prioritizes for development. Therefore, how to improve the safety and cycle life of the battery and develop a highly heat-resistant and high-performance battery diaphragm has always been the direction of electrochemical exploration.

[0004] Wood is an important component of the earth's renewable biomass materials, a core carrier of global biocarbon fixation, and an important strategic resource for the country's green development. As a sustainable, renewable and biodegradable material, wood is considered a potential substitute for 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 for responding to environmental stimuli during the evolution process. It is a "smart material" that is responsive and adaptable to the environment. If the structure of wood can be precisely controlled, it can give wood 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 a device and method for making battery separators using wood-based elastomers, which has the advantages of being green and environmentally friendly, having a long service life, having superior performance, having a low cost, having a high degree of mechanization, and being simple and easy to operate.

[0006] To this end, a method for making a battery separator using a wood-based elastomer of the present invention comprises the following steps: (1) Equipment for preparing battery separators; (2) Take a log sheet with a 1-2 mm thick tangential section; (3) Alkali treatment is used to remove more than 80% of the matrix inside the ray structure of the log veneer; (4) cutting the treated wood veneer into battery separator sizes using a slitting device; (5) Add electrolyte to wet the elastic diaphragm, which can be directly used to assemble the battery.

[0007] 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 cut into equal-width log veneers with a thickness of 1 to 2 mm by a chord cutting machine, and each equal-width log veneer strip is glued end to end to form a board roll, and the board roll is subjected to alkali treatment in the battery diaphragm equipment to remove more than 80% of the internal matrix of the log board roll ray structure, and the slitting device cuts the treated wood veneer into the required battery diaphragm size.

[0008] As a further description of the above technical solution: the steps of removing the internal matrix of the ray structure of the log veneer by alkali treatment are: (1) The log veneer is mixed with 10wt% alkaline solution in a mass ratio of 1:50, stirred at 90°C for 5 to 10 hours, and after the reaction, repeatedly washed with distilled water until the pH of the log veneer is neutral; (2) Mix the pH-neutral wood veneer with 2 wt% sodium hypochlorite solution at a mass ratio of 1:50, adjust the pH to 4.9 with glacial acetic acid, and then heat and stir at 80-85°C for 5-10 hours. After the reaction is completed, add 5-8% ethanol by mass of the reaction liquid, stop the reaction for 1-2 hours, remove the reaction liquid, rinse with ultrapure water, and soak for 10-24 hours; (3) freezing the soaked wood chips at -70°C for 5 hours, and then placing them in a freeze dryer for 36 to 72 hours to obtain a wood-based elastic diaphragm; Or after the moisture content of the soaked wood chips is controlled at 20%, hot pressing is performed at 60-170°C and 1-25MPa for 0.1-24h to obtain a wood-based elastic diaphragm.

[0009] As a further description of the above technical solution: the alkaline solution is any one of potassium hydroxide, sodium hydroxide and lithium hydroxide.

[0010] As a further description of the above technical solution: the electrolyte includes electrolytes used in metal / ion batteries such as lithium, sodium, potassium, various aqueous batteries and capacitors, and the electrolyte is added dropwise using a conventional dropping method, and the immersion time does not exceed 5 minutes.

[0011] A device for making a battery diaphragm using a wood-based elastomer, the battery diaphragm device comprising a material feeding device, an alkali treatment device, a flushing 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 provided with a terminating reaction device, a soaking device, a hot pressing device, and a slitting device in sequence; The sheet roll is guided out by the material feeding device and enters the alkali treatment device to complete the alkalization 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 board, 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 water 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 it is cut longitudinally and transversely through the slitting device to form a block of wood-based elastomer battery diaphragm.

[0012] As a further description of the above technical scheme: the material feeding device is: the plate roll is located on the air expansion shaft, and grooves for the two ends of the air expansion shaft to be inserted are provided on both sides of the lower left end of the machine body, and a pair of feeding rollers are arranged side by side at the bottom of the grooves, and a feeding motor drives a feeding roller to rotate, and both ends of the air expansion shaft are placed between the upper ends of the two feeding rollers, and 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, and 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 for driving 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, and the plate exported from the plate roll is pulled out from between the feeding plate active roller and the feeding plate driven roller and enters the alkali treatment device.

[0013] As a further description of the above technical solution: the alkali treatment device is: a plurality of return ports are provided at intervals in the middle of the lower end surface 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 port is communicated with the water inlet of the water pump through the return 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 surface of the liquid storage tank, and a plurality of guide plates are provided at intervals between the middle parts of the longitudinal side walls of the liquid storage tank Rollers, the plate moves forward from the lower end of each guide roller, each guide roller is respectively located on the middle of the guide shaft, and roller sprockets are fixed on the same side of the guide shaft that is connected to the corresponding side wall of the liquid storage tank through a sealed bearing countershaft on both sides of the guide shaft, and an annular roller transmission chain is sleeved on each roller sprocket, and a transmission pinion is fixed on the other side of a guide shaft located at the rear end of the liquid storage tank, and the transmission pinion is meshed with the transmission large gear located at its upper end, and the transmission large gear is located on the transmission extrusion shaft outside the detection disk, and a pulling plate mechanism is provided on both side walls of the rear part of the liquid storage tank; The pulling plate mechanism comprises 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, the lower shaft fixing block and the upper shaft fixing block are axially connected from bottom to top between the two support plates on the same side, an upper pressure plate is respectively arranged on the two support plates on the same side of the upper end of the upper shaft fixing block, an adjusting screw is screwed in the middle of the upper pressure plate, the lower end of the adjusting screw is axially connected to the middle of the upper shaft fixing block, an upper pressure plate adjusting hand wheel is arranged on the upper end of the adjusting screw, bearing seat holes are respectively arranged in the middle of the upper shaft fixing block and the lower shaft fixing block, transmission extrusion shafts extending to both sides are respectively arranged in the middle of both ends of the transmission extrusion roller, and transmission extrusion shafts extending to both sides are respectively arranged in the middle of both ends of the extrusion roller. There are extrusion shafts extending to both sides, and the two sides of the transmission extrusion shaft are respectively axially connected to the bearing seat holes of the corresponding lower shaft fixing block, and the two sides of the extrusion shaft are respectively axially connected to the bearing seat holes of the corresponding upper shaft fixing block. The transmission extrusion shaft and the extrusion shaft located on one side of the upper and lower shaft fixing blocks are respectively provided with an upper transmission gear and a lower transmission gear, and 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, and 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, and 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 a 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.

[0014] As a further description of the above technical solution: the hot pressing device is: a support is provided at the lower part of the frame, a support plate is provided at the upper end of the support, a lower top plate is provided at the upper end of the support, 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 pipe 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.

[0015] 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 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, bearing seat holes are respectively provided in the middle of the support plate, the two ends of the knife shaft are respectively axially connected in 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 ends of the two support plates, a shaft seat mounting plate is provided on the connecting plate, and two front The adjusting slideway is connected to the rear, and a plurality of telescopic shaft seats are arranged in the adjusting slideway of the shaft seat mounting plate at intervals through fastening bolts. The middle shaft of the telescopic shaft is arranged in the telescopic shaft seat, and the lower end shaft of the telescopic shaft is provided with a rotating pressure wheel, and the upper end shaft of the telescopic shaft is provided with a telescopic shaft adjustment hand wheel which can drive the telescopic shaft to move up and down, and 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 plate, a lower mounting plate is provided on the machine 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 both ends of the cylinder seat plate through a fixing nut, a cutter cylinder is provided in the middle of the upper end of the cylinder seat 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, upper cutter mounting plates are provided on both sides of the upper cutter, guide column shaft sleeves are provided on both sides of the upper cutter mounting plate, and the guide column shaft sleeve is arranged on the guide column, so that the upper cutter can move up and down on the guide column through the guide column shaft sleeve, and the teeth of the upper cutter and the teeth of the lower cutter are in a scissor-shaped bite.

[0016] The present invention has the following beneficial effects: 1. The present invention adopts simple chemical means to remove only the amorphous matrix in the wood ray, retains the xylem 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 the modification of the wood ray structure. The wood-based elastic battery separator prepared by the present invention has a cycle life increased by more than 100 times compared with commercial glass fiber battery separators, which is better than most of the reported battery separators; compared with commercial glass fiber battery separators, the conductivity is increased by more than 4 times, and has good performance.

[0017] 2. The wood-based elastic battery separator preparation device provided by the present invention has a reasonable design and strong mechanical properties. It can completely prepare the plate into a wood-based elastic battery separator. It has the advantages of assembly line mechanical operation, labor saving, less manpower, and high production efficiency.

[0018] 3. The preparation method provided by the present invention is simple and easy to implement, the raw materials are easy to obtain, and it is suitable for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the overall structural distribution of the equipment for making a battery separator according to the present invention; Figure 2 It is a structural schematic diagram of a material feeding device in the equipment of the present invention; Figure 3 It is a schematic structural diagram of the alkali treatment device in the equipment of the present invention; Figure 4 for Figure 3 Schematic diagram of the AA section structure; Figure 5 It is a structural schematic diagram of the pulling plate mechanism in the device of the present invention; Figure 6 It is a structural schematic diagram of a hot pressing device in the equipment of the present invention; Figure 7 It is a structural schematic diagram of the longitudinal cutting mechanism in the device of the present invention; Figure 8 It is a structural schematic diagram of the telescopic shaft seat portion in the longitudinal cutting mechanism of the present invention; Fig. 9 A schematic diagram of the structure of the cross-cutting mechanism in the device of the present invention is a schematic diagram of the cross-cutting mechanism in the device of the present invention; Fig.10 It is a structural schematic diagram of an electric control box in the device of the present invention; Fig.11 Elastic stress-strain diagram for different tree species; Fig.12 Electrochemical performance diagram of different tree species elastic diaphragms used as aqueous zinc ion battery diaphragms; Fig.13 The figure is a cycle life diagram of the wood elastomer diaphragm of the present invention and the traditional glass fiber diaphragm; Fig.14 The impedance comparison diagram of the wood elastomer diaphragm of the present invention and the traditional glass fiber diaphragm is shown in FIG. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described in conjunction with specific embodiments below, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present invention. The construction methods in the following embodiments, unless otherwise specified, are all conventional methods. The materials, devices, equipment, etc. used in the following embodiments, unless otherwise specified, can all be obtained from commercial channels.

[0021] Example 1: Figures 1 to 14 As shown, a method for making a battery separator using a wood-based elastomer comprises the following steps: (1) Equipment for preparing battery separators; (2) Take a log sheet with a 1-2 mm thick tangential section; (3) Alkali treatment is used to remove more than 80% of the matrix inside the ray structure of the log veneer; (4) cutting the treated wood veneer into battery separator sizes using a slitting device; (5) Add electrolyte to wet the elastic diaphragm, which can be directly used to assemble the battery.

[0022] The wood can be any kind of wood. The wood is first cut into equal-length sections, and then each equal-length section is cut into equal-width log veneer strips with a thickness of 1 to 2 mm by a chord cutting machine. The equal-width log veneer strips (i.e., board 10) are glued end to end and then rolled into a board roll 11. In the battery separator equipment, the board roll 10 is subjected to an alkali treatment to remove more than 80% of the internal matrix of the log board roll ray structure, and the slitting device is used to cut the treated wood veneer into the required battery separator size.

[0023] The steps of removing the internal matrix of the ray structure of the log veneer by alkali treatment are as follows: (1) The log veneer is mixed with 10wt% alkaline solution in a mass ratio of 1:50, stirred at 90°C for 5 to 10 hours, and after the reaction, repeatedly washed with distilled water until the pH of the log veneer is neutral; (2) Mix the pH-neutral wood veneer with 2 wt% sodium hypochlorite solution at a mass ratio of 1:50, adjust the pH to 4.9 with glacial acetic acid, and then heat and stir at 80-85°C for 5-10 hours. After the reaction is completed, add 5-8% ethanol by mass of the reaction liquid, stop the reaction for 1-2 hours, remove the reaction liquid, rinse with ultrapure water, and soak for 10-24 hours; (3) freezing the soaked wood chips at -70°C for 5 hours, and then placing them in a freeze dryer for 36 to 72 hours to obtain a wood-based elastic diaphragm; Or after the moisture content of the soaked wood chips is controlled at 20%, hot pressing is performed at 60-170°C and 1-25MPa for 0.1-24h to obtain a wood-based elastic diaphragm.

[0024] The alkaline solution is any one of potassium hydroxide, sodium hydroxide and lithium hydroxide.

[0025] The electrolyte includes electrolytes used in metal / ion batteries such as lithium, sodium, potassium, various aqueous batteries, and capacitors. The electrolyte is added dropwise using a conventional dropping method, and the immersion time does not exceed 5 minutes.

[0026] 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 provided with a reaction termination device, a soaking device, a hot pressing device, and a slitting device in sequence.

[0027] The sheet roll 11 is guided out of the sheet 10 through the material feeding device and enters the alkali treatment device 2 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 3. After the sheet is repeatedly washed to remove the alkali solution, it enters the reaction treatment device 4 to carry out the reaction treatment process of removing the internal matrix of the ray structure of the log thin board, and the reaction liquid in the sheet is hydraulically squeezed out through the pulling plate mechanism and sent to the termination reaction device 5 to terminate the 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 10 is repeatedly washed to remove the termination reaction liquid, the water in the sheet is squeezed out through the pulling plate mechanism, and sent to the hot pressing device 7 to form a wood-based elastomer battery diaphragm strip material, and finally it is cut longitudinally and transversely through the slitting device 8 to form a block of wood-based elastomer battery diaphragm.

[0028] like Fig.10As shown, the electric control box 9 is located in the middle or one end of the machine body. The electric control box 9 is equipped with a PLC controller, related control components and various operating circuit modules. The outer end panel is equipped with a control panel, temperature control and other indicator meters 13, a touch screen 12, a control button 14 and other control input components, which are used to coordinate the program control, transmission control and information transmission of various mechanisms. 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 the various mechanisms, such as controlling the speed of the coil feeding motor, the plate feeding motor, the servo motor, and the slitting motor to achieve the synchronous operation of the coordinated plate. In addition, sensors, tracking electric eyes, various tracking photoelectric eyes, and various photoelectric eye detection disks are used to have good information feedback to the PLC controller and the PLC controller controls the relevant components according to the feedback information. The control circuit is a traditional circuit, so it will not be repeated.

[0029] like Figure 1 and Figure 2 As shown, the material feeding device 1 is: the plate roll 11 is located on the air expansion shaft 104, and grooves for the two ends of the air expansion shaft 104 to be inserted are provided on both sides of the lower left end of the body 101, and a pair of feeding rollers 103 are arranged side by side at the bottom of the grooves. The feeding motor 102 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 side of the machine body 101 are respectively axially connected to the two sides of the feeding plate active roller 106, and the two sides of the upper end of the feeding plate active roller 106 are respectively axially connected to the two sides of the feeding plate driven roller 107. The feeding plate active roller 106 and the feeding plate driven roller 107 are gear-connected to each other on one side through gears, and a feeding plate motor 105 for driving the feeding plate active roller to rotate is provided on the machine body at the lower end of the other side of the feeding plate active roller, and a plate tracking photoelectric eye 108 is provided on the machine body between the outer sides of the feeding plate active roller and the feeding plate driven roller. The plate 10 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 2.

[0030] During operation, under the instruction of the control system, the coil feeding motor 102 is started to drive a coil feeding roller 103 to rotate, and the air expansion shaft 104 is driven to guide the sheet 10 out of the sheet roll 11 stored on the air expansion shaft, and the sheet feeding motor 105 is started to drive the sheet feeding active roller clockwise and the sheet feeding driven roller counterclockwise to rotate, and the sheet 10 passes between the sheet feeding active roller and the sheet feeding driven roller, and the sheet feeding active roller and the sheet feeding driven roller pull and support the sheet 10 to move upward, and the tracking photoelectric eye 108 tracks and adjusts from the color mark point of the sheet 1, and feeds back information, and according to the instruction of the control system, ensures that the sheet is complete, orderly and slowly fed into the alkalization treatment device 2 for alkalization treatment of the sheet.

[0031] like Figure 1 , Figures 3 to 5As shown, the alkali treatment device 2 is: a plurality of legs 212 are provided at intervals at the lower end of a strip-shaped liquid storage tank 211, an alkaline solution is provided in the strip-shaped liquid storage tank 211, and the liquid level of the alkaline solution is located at the lower end of a water spray pipe 201. A plurality of return ports 213 are provided at intervals in the middle of the lower end surface of the strip-shaped liquid storage tank 211, and a plurality of water spray pipes 201 are provided at intervals between the upper parts of the longitudinal side walls of the liquid storage tank 211, and each return port is communicated with the water inlet of a water pump 209 through a 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 respectively communicated with each water spray pipe 201 through a water outlet pipe. A heater 215 is provided on the outer wall of the lower end surface of the liquid storage tank, and the heater is preferably an electromagnetic heater, which is used to heat the alkalized liquid in the liquid storage tank. A plurality of guide rollers 202 are provided at intervals between the middle of the longitudinal two side walls of the liquid storage tank, and the plate 10 moves forward from the lower end of each guide roller 202, so that the plate can be completely immersed in the alkaline liquid in the liquid storage tank. Each guide roller is located in the middle of the guide shaft 203, and a roller sprocket 205 is fixed on the same side of the guide shaft after the two sides of the guide shaft are connected to the corresponding side wall of the liquid storage tank through the sealed bearing pair 227, and the annular roller transmission chain 204 is sleeved on each roller sprocket 205, so that each roller sprocket belt rotates counterclockwise synchronously with each guide roller, and the plate is guided to move forward slowly; a transmission pinion 230 is fixed on the other side of a guide shaft 203 located at the rear end of the liquid storage tank, and the transmission pinion 230 is engaged with the transmission large gear 229 located at its upper end, and the transmission large gear is located on the transmission extrusion shaft 228 outside the detection disk, and a pulling plate mechanism is provided on the two side walls of the rear part of the liquid storage tank.

[0032] like Figure 4 and Figure 5As shown, the pulling plate mechanism includes a mounting plate 232, two support plates 208, a lower shaft fixing block 231, an upper shaft fixing block 226, an upper pressure plate 224, a transmission extrusion roller 222, a transmission extrusion shaft 228, an extrusion roller 223, an extrusion 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 of the rear part of the liquid storage tank 211, and the lower shaft fixing block 231 and the upper shaft fixing block 226 are axially connected between the two support plates on the same side from bottom to top. The two support plates 208 on the same side of the upper end of the upper shaft fixing block 226 are respectively provided with an upper pressure plate 224, and an adjusting screw is screwed in the middle of the upper pressure plate 224, 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 hand wheel 221 is provided at the upper end of the adjusting screw. Rotating the upper pressure plate adjusting hand wheel 221 can drive the adjusting screw to rise or fall in the middle of the upper pressure plate 224, so that the upper shaft fixing block also rises or falls between the two support plates, thereby adjusting the gap between the squeezing roller 223 and the transmission squeezing roller 222, and the plate passes through the gap between the squeezing roller 223 and the transmission squeezing roller 222, completing the extrusion of the liquid in the plate and pulling the plate forward. 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 228 extending to both sides are respectively provided in the middle of both ends of the transmission extrusion roller 222, and extrusion shafts 225 extending to both sides are respectively provided in the middle of both ends of the extrusion roller 223, and the two sides of the transmission extrusion shaft are respectively connected to the corresponding bearing seat holes of the lower shaft fixing block, and the two sides of the extrusion shaft are respectively connected to the corresponding bearing seat holes of the upper shaft fixing block. The transmission extrusion shaft 228 and the extrusion shaft 225 located on one side of the upper and lower shaft fixing blocks are respectively provided with an upper transmission gear 206 and a lower transmission gear 220, and the transmission extrusion shaft on the same side as the lower transmission gear is provided with a transmission sprocket 207, and the transmission extrusion shaft 228 on the other side of the lower shaft fixing block is provided with a detection disk, and another tracking photoelectric eye 233 is located on the support plate at the upper end of the detection disk, and the transmission extrusion shaft outside the detection disk is provided with a transmission large gear 229 that drives the transmission small gear 230 to rotate, and the body at the lower end of the lower transmission gear 220 is provided with a shaft rod, and the shaft rod is provided with a tensioning synchronous sprocket 216 through a bearing shaft, which is used 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, and the plate passes between the transmission extrusion roller and the extrusion roller.

[0033] There are several pulling plate mechanisms, which are respectively located at the upper rear end of the alkali treatment device 2, the flushing device 3, the reaction treatment device 4, the termination reaction device 5, the soaking device 6, the hot pressing device 7, and the rear end of the longitudinal cutting mechanism in the slitting device, serving as the power source for the forward movement of the plate.

[0034] During operation, the tracking photoelectric eye 233 controlled by the PLC controller reads the detection disk data to control the servo motor 217 to run synchronously with the coil 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 large gear 229 to rotate through the transmission extrusion shaft 228, so that the transmission upper gear engaged with the transmission lower gear 220 rotates in the opposite direction, and then the transmission extrusion roller and the extrusion roller also rotate in the opposite direction, and the plate 10 passes between the transmission extrusion roller and the extrusion roller, pulling the plate to move slowly forward in the liquid storage tank and squeeze the plate out of the liquid storage tank 211 to make the alkali solution flow back to the liquid storage tank 211 for reuse; at the same time, the transmission large gear 229 drives the transmission small gear 230 engaged with it to rotate counterclockwise, and the small gear 230 drives its guide plate shaft 203 and the guide plate roller 202 to rotate counterclockwise, and passes The roller sprocket 205 and the annular roller transmission chain 204 on the other side of the guide plate shaft drive the other guide plate rollers 202 to rotate synchronously counterclockwise. As the plate 10 moves forward from the lower end of each guide plate roller 202, the plate can be completely immersed in the alkalized liquid in the liquid storage tank and the pulling plate mechanism guides the plate to move slowly forward in the liquid storage tank. At the same time, the water pump 209 is started to extract the alkalized liquid in the liquid storage tank from each return water port through the return water pipe 214, and then press it out through the water outlet pipe of the water pump and spray it out from each water spray pipe 201 respectively, forming circulating water to accelerate the alkalization treatment of the plate in the liquid storage tank. The heater 215 on the outer wall of the lower end surface of the liquid storage tank completes the heating of the liquid storage tank, that is, the temperature control sensor, analysis sensor, etc. provided in the liquid storage tank will have good information feedback to the PLC controller and the PLC controller will control the performance of the relevant components according to each feedback information and display, self-control heating or prompt operation. The control circuit is a traditional circuit.

[0035] Turning the upper pressure plate adjusting hand wheel 221 can drive the adjusting screw to rise or fall in the middle of the upper pressure plate 224, so that the upper shaft fixing block also rises or falls between the two support plates, thereby adjusting the gap between the squeezing roller 223 and the transmission squeezing roller 222, and the plate passes through the gap between the squeezing roller 223 and the transmission squeezing roller 222, completing the extrusion of the liquid in the plate and pulling the plate forward.

[0036] like Figure 1 As shown, the flushing device 3 is located at the rear end of the alkali treatment device 2, and is used to repeatedly wash the alkali-treated board until the pH of the wood veneer is neutral. 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, but the liquid in the liquid storage tank is distilled water.

[0037] The reaction treatment device 4 is located at the rear end of the flushing device 3, and is used for reaction treatment of the plate with neutral pH. Therefore, the structure of the reaction treatment device 4 is the same as that of the alkali treatment device 2, so it is not repeated, but the liquid in the liquid storage tank is the reaction liquid (that is, the plate with neutral pH is mixed with 2 wt% sodium hypochlorite solution in a mass ratio of 1:50, and the pH is adjusted to 4.9 with glacial acetic acid, and then heated and stirred at 80-85°C).

[0038] 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 treatment process).

[0039] The immersion 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.

[0040] 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.

[0041] The hot pressing device 7 is as follows: a support 714 is provided at the lower part of the 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 intervals in the middle of both sides of the hydraulic cylinder mounting plate 705, and a guide column 703 is axially arranged 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 intervals in the middle of the lower pressing plate 710 and the lower top plate 712, which are used to heat the lower pressing plate 710 and the lower top plate 712, and the heating tube can be an electromagnetic heating tube, which is controlled by a PLC controller to read the temperature control sensor on the lower pressing plate 710 or the lower top plate 712 and automatically control the heating temperature. Two hydraulic cylinders 704 are arranged at a distance on the hydraulic cylinder mounting plate 705 between the two sliding guide sleeves, and the two hydraulic cylinders 704 are controlled by a PLC controller. A shaft seat 708 is arranged on the cross plate 706 at the lower end of the two hydraulic cylinders 704, and the lower end of the telescopic rod 707 of each hydraulic cylinder is connected to the corresponding shaft seat through a connecting shaft. A pulling plate mechanism is arranged at the upper end of the rear part of the hot pressing device 7 as a power source for the plate to move forward, and the plate 10 passes through the lower top plate.

[0042] During operation, the pulling plate mechanism pulls the plate 10 between the lower top plate and the upper pressing plate 710, and the two hydraulic cylinders 704 drive the cross plate 706 to move downward along the guide column 703 through the telescopic rod 707 and the connecting shaft of the hydraulic cylinder, and drive the lower end surface of the upper pressing plate 710 to press the upper end surface of the lower top plate, so as to realize hot pressing and drying of the plate, and form a wood-based elastomer battery diaphragm strip material; then the connecting shaft drives the cross plate 706 to move upward along the guide column 703 through the sliding guide sleeve 702, and drives the lower end surface of the upper pressing plate 710 to separate from the upper end surface of the lower top plate, and the wood-based elastomer battery diaphragm strip material is introduced into the front end of the slitting device by the pulling plate mechanism provided at the rear upper end of the hot pressing device 7. The two hydraulic cylinders are controlled by a PLC to realize heating, pressing and drying of the plate.

[0043] 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; like Figure 7 and Figure 8As shown, the longitudinal cutting mechanism is as follows: a mounting plate 805 is provided on the machine body 811, two support plates 818 are respectively located on both sides of the upper end of the mounting plate 805, and bearing seat holes 819 are respectively provided in the middle of the support plate 818, and the two ends of the knife shaft 803 are respectively axially connected in the corresponding bearing seat holes 819. An input sprocket 804 and an output transmission sprocket 820 are respectively provided at the two ends of the knife shaft located on the outer side of the support plate, and a plurality of knife seats 801 are provided at intervals on the knife shaft 803 located on the inner side of the support plate, and a slitting knife 802 is provided on the middle part of the outer peripheral wall of the knife seat 801, and the distance between adjacent slitting knives is the width of a wood-based elastomer battery diaphragm. The upper ends of the two support plates are provided with a connecting plate 814, on which a shaft seat mounting plate 813 is provided, and on which two adjustment slideways 810 are provided that are connected front and back. A plurality of telescopic shaft seats 815 are provided in the adjustment slideway 810 of the shaft seat mounting plate at intervals through fastening bolts 809, so as to facilitate setting the corresponding number of telescopic shaft seats 815 and the width of two adjacent telescopic shaft seats 815 according to the width of the battery diaphragm. The middle shaft of the telescopic shaft 817 is provided in the telescopic shaft seat 815, and the lower end shaft of the telescopic shaft 817 is provided with a rotating pressure wheel 812, and the upper end shaft of the telescopic shaft 817 is provided with a telescopic shaft adjustment hand wheel 816 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 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 machine body at the rear end of the knife 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 passes between the transmission extrusion roller 222 and the extrusion roller 223, completing the traction of the longitudinally cut wood-based elastomer battery diaphragm strip material and entering the cross-cutting mechanism.

[0044] During operation, the slitting servo motor 807 is controlled by a PLC controller. The slitting servo motor 807 drives the input sprocket 804 to rotate clockwise through the transmission slitting sprocket 808 and the transmission chain 806. The input sprocket 804 drives the output transmission sprocket 820, the knife shaft 803 and several knife seats 801 arranged at intervals thereon to rotate clockwise. Each slitting knife 802 drives each rotating pressure wheel 812 engaged therewith to rotate counterclockwise. Since the longitudinal cutting of the wood-based elastomer battery diaphragm strip material is completed between the slitting knife 802 and the rotating pressure wheel 812, that is, the wood-based elastomer battery diaphragm strip material is located at the inlet end of the longitudinal cutting mechanism at the preset position between the two, each slitting knife and the rotating pressure wheel and the wood-based elastomer battery diaphragm strip material located at the preset position between the two are pulled by each slitting knife and the rotating pressure wheel and the pulling plate mechanism, and enter between each slitting knife and the rotating pressure wheel. Each rotating pressure wheel cooperates with the slitting knife to complete the longitudinal cutting of the wood-based elastomer battery diaphragm strip material into battery diaphragms of a film width.

[0045] like Fig. 9 As shown, 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 slide plate, and a pulling mechanism is arranged at the rear side of the outlet end of the longitudinal cutting mechanism, so as to facilitate the longitudinally cut wood-based elastomer battery diaphragm strip material to enter the inlet end of the cross-cutting mechanism. A lower mounting plate 826 is provided on the machine body 811, and guide columns 822 are provided on both side ends of the lower mounting plate. A lower cutter 825 is provided on the upper end of the lower mounting plate between the guide columns 822. The upper end of the guide column is connected to both ends of the cylinder seat plate 828 through a fixing nut. A cutter cylinder 831 is provided in the middle of the upper end of the cylinder seat plate. The cutter cylinder 831 is controlled by a PLC controller. The cylinder telescopic rod 830 of the cutter cylinder 831 is connected to the middle of the upper end of the upper cutter 823 through a connecting plate 829. Upper cutter mounting plates 824 are provided on both sides of the upper cutter. Guide column shaft sleeves 821 are provided on both sides of the upper cutter mounting plate. The guide column shaft sleeve 821 is axially 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 teeth of the upper cutter and the teeth of the lower cutter are in a scissor-shaped bite.

[0046] During operation, the longitudinally cut wood-based elastic battery separator strip material enters between the upper cutter 823 and the lower cutter 825, and the cylinder telescopic rod 830 of the cutter cylinder 831 drives the upper cutter 823 through the connecting plate through the guide column 822 and the guide column shaft sleeve 821 to move up and down quickly, driving the upper cutter teeth and the lower cutter teeth to quickly cut the entering battery separator strip material according to the long horizontal direction of a battery separator, forming a complete number of finished battery separators. Before using the finished battery separator, the electrolyte is dripped to infiltrate the elastic separator.

[0047] The cutter cylinder is provided with air source by an air supply machine controlled by a PLC controller or an electric cutter cylinder controlled by a PLC controller.

[0048] Embodiment 2: Different from Embodiment 1, balsa wood is used as elastic diaphragm of button zinc ion battery, comprising the following steps: Cut a balsa wood sheet with a 1mm thick tangential section, mix the balsa wood chips with 5wt% alkaline solution at a mass ratio of 1:50, and stir at 90℃ for 6h. After the reaction, wash the wood chips repeatedly with distilled water until the pH of the wood chips is neutral, mix the wood chips with neutral pH with 2 wt% sodium hypochlorite solution at a mass ratio of 1:50, adjust the pH to 4.9 with glacial acetic acid, and then heat and stir at 85℃ for 10h. After the reaction is completed, add 10mL of ethanol, stop the reaction for 1-2h, remove the reaction liquid, rinse with ultrapure water and soak for 24h. Hot press the clean wood chips at 60-170℃ and 1-25MPa for 0.1-24h to obtain a balsa wood-based elastic diaphragm. Use a zinc sheet with a diameter of 14mm as the negative electrode and a V2O5 with a diameter of 14mm as the positive electrode, cut a balsa wood-based elastomer with a diameter of 19mm as the diaphragm, and assemble a button battery.

[0049] The rest of the equipment including the battery separator used is the same as that in Example 1, so it will not be described again.

[0050] Embodiment 3: Poplar wood is used as an elastic diaphragm for aqueous zinc ion batteries, comprising the following steps: Cut a poplar wood sheet with a 2mm thick tangential section, mix the poplar wood chips with 10wt% alkaline solution at a mass ratio of 1:50, and stir at 90℃ for 10h. After the reaction, wash the wood chips repeatedly with distilled water until the pH of the wood chips is neutral, mix the wood chips with neutral pH with 3 wt% sodium hypochlorite solution at a mass ratio of 1:50, adjust the pH to 4.9 with glacial acetic acid, and then heat and stir at 85℃ for 24h. After the reaction is completed, add 10mL of ethanol, stop the reaction for 1-2h, remove the reaction liquid, rinse with ultrapure water and soak for 24h. Hot press the clean wood chips at 60-170℃ and 1-25MPa for 0.1-24h to obtain a poplar-based elastic diaphragm. Assemble a button battery with a zinc sheet with a diameter of 14mm as the negative electrode, a V2O5 with a diameter of 14mm as the positive electrode, and a poplar-based elastomer with a diameter of 19mm as the diaphragm.

[0051] The rest of the equipment including the battery separator used is the same as that in Example 1, so it will not be described again.

[0052] Embodiment 4: Basswood is used as an elastic diaphragm for a lithium-ion battery, comprising the following steps: Cut a 1mm thick basswood sheet, mix the basswood slices with 10wt% alkaline solution at a mass ratio of 1:50, and stir at 90℃ for 10h. After the reaction, wash the wood chips repeatedly with distilled water until the pH of the wood chips is neutral, mix the neutral pH wood chips with 3 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 85℃ for 30h. After the reaction is completed, add 10mL of ethanol, stop the reaction for 1-2h, remove the reaction liquid, rinse with ultrapure water and soak for 24h. Hot press the clean wood chips at 60-170℃ and 1-25MPa for 0.1-24h to obtain a basswood-based elastic diaphragm. Assemble button batteries with a lithium sheet with a diameter of 14mm as the positive electrode, a graphite with a diameter of 14mm as the negative electrode, and a basswood-based elastomer with a diameter of 17mm as the diaphragm.

[0053] The rest of the equipment including the battery separator used is the same as that in Example 1, so it will not be described again.

[0054] Example 5: Alder as elastic diaphragm for sodium ion battery, comprising the following steps: Cut an alder sheet with a 1mm thick tangential section, mix the alder slices with 10wt% alkaline solution at a mass ratio of 1:50, and stir at 90℃ for 10h. After the reaction, wash the wood chips repeatedly with distilled water until the pH of the wood chips is neutral, mix the wood chips with neutral pH with 3 wt% sodium hypochlorite solution at a mass ratio of 1:50, adjust the pH to 4.9 with glacial acetic acid, and then heat and stir at 85℃ for 24h. After the reaction is completed, add 10mL of ethanol to stop the reaction for 1-2h, remove the reaction liquid, rinse with ultrapure water and soak for 24h. Freeze the clean wood chips at -70℃ for 5h, then place them in a freeze dryer and dry them for 72h to obtain an alder-based elastic diaphragm. Assemble a button battery with a sodium sheet with a diameter of 14mm as the negative electrode, a sodium iron phosphate with a diameter of 14mm as the negative electrode, and an alder-based elastomer with a diameter of 17mm as the diaphragm.

[0055] Fig.11 The stress-strain diagram of elasticity of different tree species in the embodiment of the present invention. Due to different ray structures, a series of wood-based elastomers with different elastic deformations were successfully prepared. Under the same stress, basswood showed a greater strain capacity, followed by alder.

[0056] Fig.12 The electrochemical performance diagram of the aqueous zinc ion battery diaphragm made of different tree species is shown in the present invention. The electrochemical performance is directly related to the elastic capacity, and basswood exhibits the best electrochemical performance.

[0057] Fig.13The cycle life of the balsa wood elastomer diaphragm and the traditional glass fiber diaphragm in Example 2 of the present invention is compared. Compared with 76 hours of the traditional glass fiber diaphragm, the cycle life of the balsa wood elastomer diaphragm can reach 1169 hours, which is much better than the commercial glass fiber diaphragm and has great application prospects.

[0058] Fig.14 This is an impedance comparison diagram of the balsa elastomer diaphragm and the traditional glass fiber diaphragm in Example 2 of the present invention. The electrical conductivity of the balsa elastomer is much better than that of the traditional glass fiber diaphragm.

[0059] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

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 sheet with a 1-2 mm thick tangential section; (3) Alkali treatment is used to remove more than 80% of the matrix inside the ray structure of the log veneer; (4) cutting the treated wood veneer into battery separator sizes using a slitting device; (5) Add electrolyte to wet the elastic diaphragm, which can be directly used to assemble the battery.

2. The method for making 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 each equal-length section is cut into equal-width log veneers with a thickness of 1 to 2 mm by a chord cutting machine. The equal-width log veneers are bonded 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 ray structure, and a slitting device is used to cut the treated wood veneer into the required battery separator size.

3. The method for making a battery separator using a wood-based elastomer according to claim 1, characterized in that: The steps of removing the internal matrix of the ray structure of the log veneer by alkali treatment are as follows: (1) The log veneer is mixed with 10wt% alkaline solution in a mass ratio of 1:50, stirred at 90°C for 5 to 10 hours, and after the reaction, repeatedly washed with distilled water until the pH of the log veneer is neutral; (2) Mix the pH-neutral wood veneer with 2 wt% sodium hypochlorite solution at a mass ratio of 1:50, adjust the pH to 4.9 with glacial acetic acid, and then heat and stir at 80-85°C for 5-10 hours. After the reaction is completed, add 5-8% ethanol by mass of the reaction liquid, stop the reaction for 1-2 hours, remove the reaction liquid, rinse with ultrapure water, and soak for 10-24 hours; (3) freezing the soaked wood chips at -70°C for 5 hours, and then placing them in a freeze dryer for 36 to 72 hours to obtain a wood-based elastic diaphragm; Or after the moisture content of the soaked wood chips is controlled at 20%, hot pressing is performed at 60-170°C and 1-25MPa for 0.1-24h to obtain a wood-based elastic diaphragm.

4. The method for making a battery separator using a wood-based elastomer according to claim 3, characterized in that: The alkaline solution is any one of potassium hydroxide, sodium hydroxide and lithium hydroxide.

5. The method for making a battery separator using a wood-based elastomer according to claim 1, characterized in that: The electrolyte includes electrolytes used in metal / ion batteries such as lithium, sodium, potassium, various aqueous batteries, and capacitors. The electrolyte is added dropwise using a conventional dropping method, and the immersion time does not exceed 5 minutes.

6. The device for making battery separators using wood-based elastomers according to claim 1, characterized in that: The battery separator equipment includes 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 provided with a terminating reaction device, a soaking device, a hot pressing device, and a slitting device in sequence; The sheet roll is guided out by the material feeding device and enters the alkali treatment device to complete the alkalization 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 board, 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 water 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 it is cut longitudinally and transversely through the slitting device to form a block of wood-based elastomer battery diaphragm.

7. The device according to claim 6, 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 to be inserted are provided on both sides of the lower left end of the machine body, and a pair of feeding rollers are arranged side by side at the bottom of the grooves, and a feeding motor drives a feeding roller to rotate, and both ends of the air expansion shaft are placed between the upper ends of the two feeding rollers, and 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, and the feeding plate active roller and the feeding plate driven roller are gear-connected to each other on one side through gears, and a feeding motor for driving 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, and the plate derived from the plate roll is pulled out from between the feeding plate active roller and the feeding plate driven roller and enters the alkali treatment device.

8. The device according to claim 6, characterized in that The alkali treatment device is as follows: a plurality of water return ports are arranged at intervals in the middle of the lower end surface of the strip-shaped liquid storage tank, a plurality of water spray pipes are arranged at intervals between the upper parts of the longitudinal side walls of the liquid storage tank, each water return port is communicated with the water inlet of the water pump through the water return pipe, the water pump is located at one side of the lower end of the liquid storage tank, the water outlet of the water pump is respectively communicated with each water spray pipe through the outlet pipe, a heater is arranged on the outer wall of the lower end surface of the liquid storage tank, a plurality of guide rollers are arranged at intervals between the middle parts of the longitudinal side walls of the liquid storage tank, and the plate is moved from each guide roller to the guide roller. The lower end of the guide plate roller moves forward, and each guide plate roller is respectively located on the middle part of the guide plate shaft. The two sides of the guide plate shaft are connected to the corresponding side walls of the liquid storage tank through the sealed bearing countershaft, and a roller sprocket is fixed on the guide plate 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 plate shaft located at the rear end of the liquid storage tank. The transmission pinion is engaged with the transmission large gear located at the upper end thereof. The transmission large gear is located on the transmission extrusion shaft outside the detection disk. A pulling plate mechanism is provided on the two side walls of the rear part of the liquid storage tank. The pulling plate mechanism comprises 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, the lower shaft fixing block and the upper shaft fixing block are axially connected from bottom to top between the two support plates on the same side, an upper pressure plate is respectively arranged on the two support plates on the same side of the upper end of the upper shaft fixing block, an adjusting screw is screwed in the middle of the upper pressure plate, the lower end of the adjusting screw is axially connected to the middle of the upper shaft fixing block, an upper pressure plate adjusting hand wheel is arranged on the upper end of the adjusting screw, bearing seat holes are respectively arranged in the middle of the upper shaft fixing block and the lower shaft fixing block, transmission extrusion shafts extending to both sides are respectively arranged in the middle of both ends of the transmission extrusion roller, and transmission extrusion shafts extending to both sides are respectively arranged in the middle of both ends of the extrusion roller. There are extrusion shafts extending to both sides, and the two sides of the transmission extrusion shaft are respectively axially connected to the bearing seat holes of the corresponding lower shaft fixing block, and the two sides of the extrusion shaft are respectively axially connected to the bearing seat holes of the corresponding upper shaft fixing block. The transmission extrusion shaft and the extrusion shaft located on one side of the upper and lower shaft fixing blocks are respectively provided with an upper transmission gear and a lower transmission gear, and 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, and 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, and 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 a 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.

9. The device according to claim 6, 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 pillars, 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 pipe 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.

10. The device according to claim 6, characterized in that The slitting device is composed of a longitudinal cutting mechanism and a transverse cutting mechanism, wherein 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, bearing seat holes are respectively provided in the middle of the support plate, the two ends of the knife shaft are respectively axially connected in 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 ends of the two support plates, a shaft seat mounting plate is provided on the connecting plate, and two front The adjusting slideway is connected to the rear, and a plurality of telescopic shaft seats are arranged in the adjusting slideway of the shaft seat mounting plate at intervals through fastening bolts. The middle shaft of the telescopic shaft is arranged in the telescopic shaft seat, and the lower end shaft of the telescopic shaft is provided with a rotating pressure wheel, and the upper end shaft of the telescopic shaft is provided with a telescopic shaft adjustment hand wheel which can drive the telescopic shaft to move up and down, and 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 plate, a lower mounting plate is provided on the machine 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 both ends of the cylinder seat plate through a fixing nut, a cutter cylinder is provided in the middle of the upper end of the cylinder seat 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, upper cutter mounting plates are provided on both sides of the upper cutter, guide column shaft sleeves are provided on both sides of the upper cutter mounting plate, and the guide column shaft sleeve is arranged on the guide column, so that the upper cutter can move up and down on the guide column through the guide column shaft sleeve, and the teeth of the upper cutter and the teeth of the lower cutter are in a scissor-shaped bite.

Images