CN103545473A - Device and method for preparing integrated lithium battery polar plate diaphragm - Google Patents
Device and method for preparing integrated lithium battery polar plate diaphragm Download PDFInfo
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- CN103545473A CN103545473A CN201310488464.7A CN201310488464A CN103545473A CN 103545473 A CN103545473 A CN 103545473A CN 201310488464 A CN201310488464 A CN 201310488464A CN 103545473 A CN103545473 A CN 103545473A
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000005096 rolling process Methods 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 28
- 229910001416 lithium ion Inorganic materials 0.000 claims abstract description 23
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000010041 electrostatic spinning Methods 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 229920000642 polymer Polymers 0.000 claims abstract description 10
- 239000002121 nanofiber Substances 0.000 claims abstract description 9
- 230000004888 barrier function Effects 0.000 claims description 33
- 239000002002 slurry Substances 0.000 claims description 15
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical group CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- 229910052799 carbon Inorganic materials 0.000 claims description 11
- 229910052802 copper Inorganic materials 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 10
- 239000002904 solvent Substances 0.000 claims description 10
- 238000012546 transfer Methods 0.000 claims description 10
- 238000001125 extrusion Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000004411 aluminium Substances 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 239000005030 aluminium foil Substances 0.000 claims description 7
- 239000011889 copper foil Substances 0.000 claims description 7
- 239000004744 fabric Substances 0.000 claims description 7
- 238000007747 plating Methods 0.000 claims description 7
- -1 polytetrafluoroethylene Polymers 0.000 claims description 7
- 238000001802 infusion Methods 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 6
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 5
- CUTSCJHLMGPBEJ-UHFFFAOYSA-N [N].CN(C)C=O Chemical compound [N].CN(C)C=O CUTSCJHLMGPBEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 238000009987 spinning Methods 0.000 claims description 4
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 3
- 239000003575 carbonaceous material Substances 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- AHADSRNLHOHMQK-UHFFFAOYSA-N methylidenecopper Chemical compound [Cu].[C] AHADSRNLHOHMQK-UHFFFAOYSA-N 0.000 claims description 3
- 239000003960 organic solvent Substances 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 abstract description 2
- 238000003860 storage Methods 0.000 abstract 1
- 238000009941 weaving Methods 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001523 electrospinning Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 229910018095 Ni-MH Inorganic materials 0.000 description 1
- 229910018477 Ni—MH Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Cell Electrode Carriers And Collectors (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention relates to a device and a method for preparing an integrated lithium battery polar plate diaphragm. The device is characterized in that a multi-pin nozzle is connected with a liquid storage device through a nozzle seat and a conveying pipe; a rolling device, an unreeling device and a double-roller rolling device are fixed on a shell; the double-roller rolling device is close to one side of the rolling device and is less than 1m away from the unreeling device; a plane formed by the rolling device and the unreeling device forms an angle of 5DEG to 45DEG with the horizontal plane. A polymer nano-fiber diaphragm is arranged on the surface of a positive polar plate in a weaving manner by utilizing an electrostatic spinning technology, the diaphragm is thermally pressed after being dried, so that a positive diaphragm on the positive polar plate is tightly bonded with the polymer nano-fiber diaphragm, and the preparation of the lithium ion battery diaphragm can be completed in the same process of the diaphragm assembling process and the polar plate assembling process. The diaphragm can be thermally pressed together with the positive material, so that firmness in combination can be realized, the assembling process of the battery can be greatly simplified, and the production efficiency and safety of the battery can be improved.
Description
Technical field
The present invention relates to a kind of device and method of preparing integrated lithium battery pole plate barrier film, belong to lithium ion battery field.
Background technology
Lithium ion battery is the nearly twenties years secondary cells that just grow up, and within 990 years, Japanese SONY company takes the lead in succeeding in developing reason ion battery.Compare with secondary cells such as conventional lead-acid battery, ickel-cadmium cell, Ni-MH batteries, lithium ion battery has the advantages such as open circuit voltage is high, volume is little, quality is light, energy density is large, memory-less effect, pollution-free, self-discharge rate is little, the life-span is long, become the best battery system of current combination property, and obtained develop rapidly.Continuous increase, the continuous reduction of cost and improving constantly of performance along with lithium ion battery output, its application percentage in the mobile phone such as notebook and miniaturization day by day constantly increases, application also constantly expands, and its application at present has been penetrated into numerous civilian and military domain such as comprising mobile phone, notebook computer, video camera, digital camera and Portable Measurement Instrument.Also be the first-selected power supply of the light high-energy electrokinetic cells such as following electric automobile, space flight, satellite, airship, submarine, underwater robot.This just makes the range of application of lithium ion battery from information industry to energy traffic, from space to constantly being expanded under water.
Lithium ion battery is mainly comprised of plus plate current-collecting body, positive electrode, barrier film, negative material, negative current collector, electrolyte and external packing.Generally positive electrode is passed through to scraper the tape casting blade coating on plus plate current-collecting body, form anode plate; Same method negative material and negative current collector form negative plates.Lithium ion battery separator is a kind of film of porous, intercepts positive/negative plate, prevents internal short-circuit of battery, allows lithium ion to pass through fast simultaneously.Thereby complete the fast transport of lithium ion between positive/negative plate in charge discharge process.Conventionally the preparation technology of barrier film is divided into two kinds of dry and wet ways, mostly is polyethylene or polypropylene film.
In traditional lithium ion battery assembling process, be that composite diaphragm is pasted and to be clipped between positive/negative plate, complex process, waste of material are larger, higher to equipment requirement; And because diaphragm material is lighter, in battery, easy play, is very easy to cause internal short-circuit of battery, forms potential safety hazard.
Once there is domestic a slice patent (CN10119268) that a kind of electrospinning process that meets nano fiber diaphragm is provided, and directly by electrospinning process, superfine fibre membrane for polymer was spun on battery pole plates, and can reach quantity-produced object.But the method in patent is not done further processing by barrier film spinning to pole plate, therefore still there is some problems in the adhesion between barrier film and pole plate, and the barrier film of electrostatic spinning is thicker, and density is less, take a large amount of volumes, affect the volumetric specific energy of battery.
Summary of the invention
The object of the present invention is to provide a kind of device and method of preparing integrated lithium battery pole plate barrier film, it directly will add pair roller system after polar board surface composite diaphragm, barrier film and pole plate are pressed together closely, form the firmly integrated production of pole plate barrier film, solved single electrostatic spinning technique generation barrier film and contacted tight and the thicker shortcoming of thickness with pole plate.
Technical scheme of the present invention is achieved in that a kind of device of preparing integrated lithium battery pole plate barrier film, by device for storing liquid, and electrostatic spinning slurry, metering infusion pump, spininess shower nozzle, high-voltage DC power supply, with the rolling roller bearing of heating system, the roller bearing that unreels with heating system, with the pair roller rcc system of heating system, battery pole plates, solvent recovery, temperature control equipment, mechanical controlling composition; It is characterized in that: spininess shower nozzle links together by nozzle boss and woven hose and device for storing liquid; Wrap-up, unwinding device and be fixed on housing rolling rolling device; To rolling rolling device near wrap-up one side, apart from unwinding device distance, be not less than 1m; The plane that wrap-up and unwinding device form becomes 5 ~ 45 ° of angles with horizontal plane.
Concrete job step is: first configure spinning solution, join in device for storing liquid, use high-voltage DC power supply at spininess shower nozzle and rolling roller bearing, unreel and between roller bearing, form positive high voltage or negative high voltage, and by rolling roller bearing and unreel roller bearing ground connection; Metering infusion pump is transported to spininess shower nozzle by electrostatic spinning slurry from device for storing liquid, and electrostatic spinning slurry sprays under action of high voltage by needle point, forms filamentary fibers and is sprayed on battery pole plates; Rolling roller bearing with unreel at the temperature of roller bearing, the organic solvent in slurry volatilizees gradually, forms nano fiber diaphragm; Afterwards the septate pole plate of coating is transported to and under pair roller rcc system, carries out roll extrusion, roll extrusion temperature is 25 ~ 60 ℃, to increase the adhesion between nano fiber diaphragm and pole plate, make barrier film pole plate strong bonded together, form barrier film/electrode plate integrated battery pole plates.
Described spininess shower nozzle is that between needle point and needle point, distance is at 10 ~ 100mm by single spininess shower nozzle or collection battle array spininess shower nozzle; The aperture of syringe needle is at 0.8 ~ 1.5mm, and the length of pin is at 20 ~ 50mm.
Distance between spray silk syringe needle and electrode slice is 10 ~ 25cm, and voltage range is at 12 ~ 25kV,
Solution delivery rate is, every pin 5 ~ 15ml/h; Rolling roller bearing is with the Temperature Setting that unreels roller bearing at 25 ~ 60 ℃, and battery lead plate transfer rate is 50 ~ 300cm/min; Roll extrusion rotating speed and the pole plate transfer rate of pair roller rolling apparatus match, and between roller bearing, the difference of spacing and electrode thickness is 0.1 ~ 1.5mm; Angle 5≤α≤45 ° that pole plate and horizontal plane form
Described battery pole plates is lithium ion cell positive plate and lithium ion battery negative plate;
Described lithium ion cell positive plate is to be coated with cobalt acid lithium, LiMn2O4, ternary material, rich lithium material or high voltage material on aluminium base, carbon cloth are aluminized base material, plating carbon aluminium foil, aluminium net, micropore aluminium foil;
Described lithium ion battery negative plate is to be coated with lithium titanate, native graphite, Delanium or silicon carbon material on copper base material, carbon cloth copper facing base material, plating carbon Copper Foil, copper mesh, micropore Copper Foil.
In described electrostatic spinning slurry, solvent is acetone, ethanol or nitrogen dimethylformamide; Dissolving in polymer is Kynoar, polyacrylonitrile or polytetrafluoroethylene, and weight content is 7% ~ 15%, and viscosity is at 500 ~ 800mPaS.
Good effect of the present invention is by barrier film together with positive electrode hot pressing, in conjunction with firmly, greatly to have simplified the technique of battery assembling, the make efficiency and the fail safe that have improved battery.
Accompanying drawing explanation
Fig. 1 is the standby electrostatic spinning apparatus schematic diagram of battery pole plates barrier film integration system of the present invention.
Fig. 2 is single multi-stylus shower nozzle schematic diagram in the standby electrostatic spinning apparatus of battery pole plates barrier film integration system of the present invention.
Fig. 3 is collection battle array multi-stylus shower nozzle schematic diagram of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in detail: as shown in Figure 1, 2, 3, a kind of device of preparing integrated lithium battery pole plate barrier film, by device for storing liquid 1, electrostatic spinning slurry 2, metering infusion pump 3, spininess shower nozzle 4, high-voltage DC power supply 5, rolling roller bearing 6, unreels roller bearing 7, pair roller rcc system 8, battery pole plates 9, solvent recovery 10, temperature control equipment 11, machinery is controlled 12 and is formed; It is characterized in that: spininess shower nozzle 4 links together by nozzle boss and woven hose and device for storing liquid 1; With the rolling roller bearing 6 of heating system, with heating system unreel roller bearing 7 and pair roller rcc system 8 is fixed on housing; Pair roller rcc system 8 is near rolling roller bearing 6 one sides, and distance unreels roller bearing 7 distances and is not less than 1m; Rolling roller bearing 6 and unreel the plane that roller bearing 7 forms and become 5 ~ 45 ° of angles with horizontal plane.
Concrete job step is: first configure spinning solution, join in device for storing liquid 1, use high-voltage DC power supply 5 at spininess shower nozzle 4 and rolling roller bearing 6, unreel and between roller bearing 7, form positive high voltage or negative high voltage, and by rolling roller bearing 6 and unreel roller bearing 7 ground connection; Metering infusion pump 3 is transported to electrostatic spinning slurry 2 spininess shower nozzle 4 from device for storing liquid 1, and electrostatic spinning slurry 2 sprays under action of high voltage by needle point, forms filamentary fibers and is sprayed on battery pole plates 9; Rolling roller bearing 6 with unreel at the temperature of roller bearing 7, the organic solvent in slurry volatilizees gradually, forms nano fiber diaphragm; Afterwards the septate pole plate of coating is transported to roller rcc system and carries out roll extrusion 8 times, roll extrusion temperature is 25 ~ 60 ℃, to increase the adhesion between nano fiber diaphragm and pole plate, makes barrier film pole plate strong bonded together, forms barrier film/electrode plate integrated battery pole plates.
Described spininess shower nozzle is that between needle point and needle point, distance is at 10 ~ 100mm by single spininess shower nozzle or collection battle array spininess shower nozzle; The aperture of syringe needle is at 0.8 ~ 1.5mm, and the length of pin is at 20 ~ 50mm.
Distance between spray silk syringe needle and electrode slice is 10 ~ 25cm, and voltage range is at 12 ~ 25kV,
Solution delivery rate is, every pin 5 ~ 15ml/h; Rolling roller bearing is with the Temperature Setting that unreels roller bearing at 25 ~ 60 ℃, and battery lead plate transfer rate is 50 ~ 300cm/min; Roll extrusion rotating speed and the pole plate transfer rate of pair roller rolling apparatus match, and between roller bearing, the difference of spacing and electrode thickness is 0.1 ~ 1.5mm; Angle 5≤α≤45 ° that pole plate and horizontal plane form
Described battery pole plates is lithium ion cell positive plate and lithium ion battery negative plate;
Described lithium ion cell positive plate is to be coated with cobalt acid lithium, LiMn2O4, ternary material, rich lithium material or high voltage material on aluminium base, carbon cloth are aluminized base material, plating carbon aluminium foil, aluminium net, micropore aluminium foil;
Described lithium ion battery negative plate is to be coated with lithium titanate, native graphite, Delanium or silicon carbon material on copper base material, carbon cloth copper facing base material, plating carbon Copper Foil, copper mesh, micropore Copper Foil.
In described electrostatic spinning slurry, solvent is acetone, ethanol or nitrogen dimethylformamide; Dissolving in polymer is Kynoar, polyacrylonitrile or polytetrafluoroethylene, and weight content is 7% ~ 15%, and viscosity is at 500 ~ 800mPaS.
embodiment 1
Use ethanol as solvent, polymer is selected LITHIUM BATTERY polytetrafluoroethylene, and polytetrafluoroethylene quality, with respect to 15% of ethanol quality, is mixed, and forms solution, and viscosity is at 800mPaS.After aluminium base is applied to ternary material, pack in conveying roller, regulating pole plate and horizontal plane angulation α is 45 °, adopts single spininess sprinkler design, and between needle point, distance is 10mm, and pin length is 20mm, and pinhole diameter is 0.8mm.Conveying roller temperature setting is set to 25 ℃, and battery lead plate transfer rate is set to 50cm/min, and delivery rate is set to every pin 5ml/h.Pair roller roller bearing temperature setting is set to 25 ℃, and roller bearing spacing is 0.1mm.Voltage is set to 12kV, and pole plate is 10cm apart from distance between needle point.Gained compound polar plate is smooth, and between barrier film and pole plate, adhesion is strong, difficult drop-off.
embodiment 2
Use nitrogen dimethylformamide as solvent, polymer is selected LITHIUM BATTERY polyacrylonitrile, and polyacrylonitrile quality, with respect to 7% of ethanol quality, is mixed, and forms solution, and viscosity is at 500mPaS.After carbon cloth copper facing base material is applied to Delanium, pack in conveying roller, regulating pole plate and horizontal plane angulation α is 5 °, adopts collection battle array spininess sprinkler design, and between needle point, distance is 100mm, and pin length is 50mm, and pinhole diameter is 1.5mm.Conveying roller temperature setting is set to 60 ℃, and battery lead plate transfer rate is set to 300cm/min, and delivery rate is set to every pin 15ml/h.Pair roller roller bearing temperature setting is set to 60 ℃, and roller bearing spacing is 1.5mm.Voltage is set to 25kV, and pole plate is 25cm apart from distance between needle point.Gained compound polar plate is smooth, and between barrier film and pole plate, adhesion is strong, difficult drop-off.
embodiment 3
Use acetone as solvent, polymer is selected LITHIUM BATTERY Kynoar, and Kynoar quality, with respect to 12% of acetone quality, is mixed, and forms solution, and viscosity is at 450mPaS.After plating carbon aluminium foil base material is applied to rich lithium material, pack in conveying roller, regulating pole plate and horizontal plane angulation α is 20 °, adopts collection battle array spininess sprinkler design, and between needle point, distance is 50mm, and pin length is 30mm, and pinhole diameter is 1.0mm.Conveying roller temperature setting is set to 30 ℃, and battery lead plate transfer rate is set to 200cm/min, and delivery rate is set to every pin 150ml/h.Pair roller roller bearing temperature setting is set to 30 ℃, and roller bearing spacing is 0.8mm.Voltage is set to 15kV, and pole plate is 18cm apart from distance between needle point.Gained compound polar plate is smooth, and between barrier film and pole plate, adhesion is strong, difficult drop-off.
Use acetone as solvent, polymer is selected LITHIUM BATTERY Kynoar, and Kynoar quality, with respect to 11% of acetone quality, is mixed, and forms solution, and viscosity is at 430mPaS.To after micropore copper foil base material coated natural graphite, pack in conveying roller, regulating pole plate and horizontal plane angulation α is 40 °, adopts single spininess sprinkler design, and between needle point, distance is 20mm, and pin length is 25mm, and pinhole diameter is 1.2mm.Conveying roller temperature setting is set to 35 ℃, and battery lead plate transfer rate is set to 250cm/min, and delivery rate is set to every pin 200ml/h.Pair roller roller bearing temperature setting is set to 35 ℃, and roller bearing spacing is 1.1 mm.Voltage is set to 20kV, and pole plate is 15cm apart from distance between needle point.Gained compound polar plate is smooth, and between barrier film and pole plate, adhesion is strong, difficult drop-off.
Claims (7)
1. a device of preparing integrated lithium battery pole plate barrier film, by device for storing liquid, electrostatic spinning slurry, metering infusion pump, spininess shower nozzle, high-voltage DC power supply, with the rolling roller bearing of heating system, the roller bearing that unreels with heating system, with the pair roller rcc system of heating system, battery pole plates, solvent recovery, temperature control equipment, mechanical controlling composition; It is characterized in that: spininess shower nozzle links together by nozzle boss and woven hose and device for storing liquid; Wrap-up, unwinding device and be fixed on housing rolling rolling device; To rolling rolling device near wrap-up one side, apart from unwinding device distance, be not less than 1m; The plane that wrap-up and unwinding device form becomes 5 ~ 45 ° of angles with horizontal plane.
2. a method of preparing integrated lithium battery pole plate barrier film, it is characterized in that concrete step is: first configure spinning solution, join in device for storing liquid, use high-voltage DC power supply at spininess shower nozzle and rolling roller bearing, unreel and between roller bearing, form positive high voltage or negative high voltage, and by rolling roller bearing and unreel roller bearing ground connection; Metering infusion pump is transported to spininess shower nozzle by electrostatic spinning slurry from device for storing liquid, and electrostatic spinning slurry sprays under action of high voltage by needle point, forms filamentary fibers and is sprayed on battery pole plates; Rolling roller bearing with unreel at the temperature of roller bearing, the organic solvent in slurry volatilizees gradually, forms nano fiber diaphragm; Afterwards the septate pole plate of coating is transported to and under pair roller rcc system, carries out roll extrusion, roll extrusion temperature is 25 ~ 60 ℃, to increase the adhesion between nano fiber diaphragm and pole plate, make barrier film pole plate strong bonded together, form barrier film/electrode plate integrated battery pole plates.
3. a kind of method of preparing integrated lithium battery pole plate barrier film according to claim 2, is characterized in that described spininess shower nozzle is that between needle point and needle point, distance is at 10 ~ 100mm by single spininess shower nozzle or collection battle array spininess shower nozzle; The aperture of syringe needle is at 0.8 ~ 1.5mm, and the length of pin is at 20 ~ 50mm.
4. a kind of method of preparing integrated lithium battery pole plate barrier film according to claim 2, is characterized in that described spray silk syringe needle and the distance between electrode slice are 10 ~ 25cm, and voltage range is at 12 ~ 25kV, and solution delivery rate is, every pin 5 ~ 15ml/h.
5. a kind of method of preparing integrated lithium battery pole plate barrier film according to claim 2, it is characterized in that described rolling roller bearing with the Temperature Setting that unreels roller bearing at 25 ~ 60 ℃, battery lead plate transfer rate is 50 ~ 300cm/min; Roll extrusion rotating speed and the pole plate transfer rate of pair roller rolling apparatus match, and between roller bearing, the difference of spacing and electrode thickness is 0.1 ~ 1.5mm; Angle 5≤α≤45 ° that pole plate and horizontal plane form.
6. a kind of method of preparing integrated lithium battery pole plate barrier film according to claim 2, is characterized in that described battery pole plates is lithium ion cell positive plate and lithium ion battery negative plate; Wherein lithium ion cell positive plate is to be coated with cobalt acid lithium, LiMn2O4, ternary material, rich lithium material or high voltage material on aluminium base, carbon cloth are aluminized base material, plating carbon aluminium foil, aluminium net, micropore aluminium foil; Described lithium ion battery negative plate is to be coated with lithium titanate, native graphite, Delanium or silicon carbon material on copper base material, carbon cloth copper facing base material, plating carbon Copper Foil, copper mesh, micropore Copper Foil.
7. a kind of method of preparing integrated lithium battery pole plate barrier film according to claim 2, is characterized in that in described electrostatic spinning slurry, solvent is acetone, ethanol or nitrogen dimethylformamide; Dissolving in polymer is Kynoar, polyacrylonitrile or polytetrafluoroethylene, and weight content is 7% ~ 15%, and viscosity is at 500 ~ 800mPaS.
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| CN201310488464.7A CN103545473A (en) | 2013-10-18 | 2013-10-18 | Device and method for preparing integrated lithium battery polar plate diaphragm |
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| CN201310488464.7A CN103545473A (en) | 2013-10-18 | 2013-10-18 | Device and method for preparing integrated lithium battery polar plate diaphragm |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953146A (en) * | 2015-06-12 | 2015-09-30 | 陈曦 | Preparation method of module used for all-vanadium redox flow battery |
| CN105703016A (en) * | 2016-04-14 | 2016-06-22 | 合肥国轩高科动力能源有限公司 | Thermal compounding equipment for bonding battery pole piece and diaphragm |
| CN106702504A (en) * | 2016-12-02 | 2017-05-24 | 武汉丽华楚材科技有限公司 | Lithium battery isolation membrane coating system and coating method |
| CN107516724A (en) * | 2016-06-16 | 2017-12-26 | 宁德新能源科技有限公司 | Battery core and energy storage device |
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| CN104953146A (en) * | 2015-06-12 | 2015-09-30 | 陈曦 | Preparation method of module used for all-vanadium redox flow battery |
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| CN110635093A (en) * | 2019-08-30 | 2019-12-31 | 电子科技大学 | A lithium-sulfur battery cathode and separator integrated structure and preparation method thereof |
| CN111446422A (en) * | 2020-03-10 | 2020-07-24 | 深圳先进技术研究院 | Diaphragm anode material with integrated structure, preparation method thereof and secondary battery |
| WO2021179740A1 (en) * | 2020-03-10 | 2021-09-16 | 深圳先进技术研究院 | Diaphragm-negative electrode material of integrated structure and preparation method therefor, and secondary battery |
| CN112877913A (en) * | 2021-01-28 | 2021-06-01 | 河南曼博睿新材料科技有限公司 | Production equipment of electrostatic 3D printing method nanofiber membrane |
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