CN207009527U - Lithium ion battery separator - Google Patents
Lithium ion battery separator Download PDFInfo
- Publication number
- CN207009527U CN207009527U CN201720292192.7U CN201720292192U CN207009527U CN 207009527 U CN207009527 U CN 207009527U CN 201720292192 U CN201720292192 U CN 201720292192U CN 207009527 U CN207009527 U CN 207009527U
- Authority
- CN
- China
- Prior art keywords
- lithium ion
- ion battery
- particle layer
- battery separator
- inorganic particle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 99
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 99
- 239000000463 material Substances 0.000 claims abstract description 132
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 128
- 239000010954 inorganic particle Substances 0.000 claims abstract description 118
- 239000008151 electrolyte solution Substances 0.000 claims abstract description 3
- 239000000835 fiber Substances 0.000 claims description 157
- 206010061592 cardiac fibrillation Diseases 0.000 claims description 50
- 230000002600 fibrillogenic effect Effects 0.000 claims description 50
- 150000002681 magnesium compounds Chemical class 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 12
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 10
- 239000000347 magnesium hydroxide Substances 0.000 claims description 10
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 10
- 239000004760 aramid Substances 0.000 claims description 9
- 229920003235 aromatic polyamide Polymers 0.000 claims description 9
- 150000001399 aluminium compounds Chemical class 0.000 claims description 5
- 238000002347 injection Methods 0.000 abstract description 68
- 239000007924 injection Substances 0.000 abstract description 68
- 239000012530 fluid Substances 0.000 abstract description 63
- 239000003792 electrolyte Substances 0.000 abstract description 32
- 238000000034 method Methods 0.000 abstract description 29
- 230000000694 effects Effects 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000011248 coating agent Substances 0.000 description 161
- 238000000576 coating method Methods 0.000 description 161
- 239000007788 liquid Substances 0.000 description 85
- 238000001035 drying Methods 0.000 description 43
- 229920000139 polyethylene terephthalate Polymers 0.000 description 19
- 239000005020 polyethylene terephthalate Substances 0.000 description 19
- -1 polypropylene Polymers 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 13
- 239000000057 synthetic resin Substances 0.000 description 13
- 229920003002 synthetic resin Polymers 0.000 description 13
- 239000000853 adhesive Substances 0.000 description 8
- 230000001070 adhesive effect Effects 0.000 description 8
- 238000007713 directional crystallization Methods 0.000 description 8
- 239000004744 fabric Substances 0.000 description 8
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 6
- 239000000523 sample Substances 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 150000002148 esters Chemical class 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 229920001131 Pulp (paper) Polymers 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 229910001593 boehmite Inorganic materials 0.000 description 4
- 229920002678 cellulose Polymers 0.000 description 4
- 239000001913 cellulose Substances 0.000 description 4
- 238000011049 filling Methods 0.000 description 4
- 238000007756 gravure coating Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000007731 hot pressing Methods 0.000 description 4
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 239000007773 negative electrode material Substances 0.000 description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 239000002202 Polyethylene glycol Substances 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 239000004840 adhesive resin Substances 0.000 description 3
- 229920006223 adhesive resin Polymers 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 239000000395 magnesium oxide Substances 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 239000011164 primary particle Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 2
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- FKRCODPIKNYEAC-UHFFFAOYSA-N ethyl propionate Chemical compound CCOC(=O)CC FKRCODPIKNYEAC-UHFFFAOYSA-N 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910003002 lithium salt Inorganic materials 0.000 description 2
- 159000000002 lithium salts Chemical class 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002905 metal composite material Substances 0.000 description 2
- 239000012046 mixed solvent Substances 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229920001223 polyethylene glycol Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 2
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- FSSPGSAQUIYDCN-UHFFFAOYSA-N 1,3-Propane sultone Chemical compound O=S1(=O)CCCO1 FSSPGSAQUIYDCN-UHFFFAOYSA-N 0.000 description 1
- VAYTZRYEBVHVLE-UHFFFAOYSA-N 1,3-dioxol-2-one Chemical compound O=C1OC=CO1 VAYTZRYEBVHVLE-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- PEPBFCOIJRULGJ-UHFFFAOYSA-N 3h-1,2,3-benzodioxazole Chemical compound C1=CC=C2NOOC2=C1 PEPBFCOIJRULGJ-UHFFFAOYSA-N 0.000 description 1
- RWRXDIMAXLSQMK-UHFFFAOYSA-N 3h-1,2,3-benzodithiazole Chemical compound C1=CC=C2NSSC2=C1 RWRXDIMAXLSQMK-UHFFFAOYSA-N 0.000 description 1
- QGHDLJAZIIFENW-UHFFFAOYSA-N 4-[1,1,1,3,3,3-hexafluoro-2-(4-hydroxy-3-prop-2-enylphenyl)propan-2-yl]-2-prop-2-enylphenol Chemical group C1=C(CC=C)C(O)=CC=C1C(C(F)(F)F)(C(F)(F)F)C1=CC=C(O)C(CC=C)=C1 QGHDLJAZIIFENW-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 241001614291 Anoplistes Species 0.000 description 1
- 229920002955 Art silk Polymers 0.000 description 1
- 229910000873 Beta-alumina solid electrolyte Inorganic materials 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 240000000491 Corchorus aestuans Species 0.000 description 1
- 235000011777 Corchorus aestuans Nutrition 0.000 description 1
- 235000010862 Corchorus capsularis Nutrition 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 229910012820 LiCoO Inorganic materials 0.000 description 1
- 229910001305 LiMPO4 Inorganic materials 0.000 description 1
- 229910003005 LiNiO2 Inorganic materials 0.000 description 1
- 229910013467 LiNixCoyMnzO2 Inorganic materials 0.000 description 1
- 229910013872 LiPF Inorganic materials 0.000 description 1
- 229910001290 LiPF6 Inorganic materials 0.000 description 1
- 101150058243 Lipf gene Proteins 0.000 description 1
- 229920000433 Lyocell Polymers 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 229910003481 amorphous carbon Inorganic materials 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000002050 diffraction method Methods 0.000 description 1
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000001523 electrospinning Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910021385 hard carbon Inorganic materials 0.000 description 1
- 229920006015 heat resistant resin Polymers 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- QQVIHTHCMHWDBS-UHFFFAOYSA-L isophthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC(C([O-])=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-L 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- DMEJJWCBIYKVSB-UHFFFAOYSA-N lithium vanadium Chemical compound [Li].[V] DMEJJWCBIYKVSB-UHFFFAOYSA-N 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- YKYONYBAUNKHLG-UHFFFAOYSA-N n-Propyl acetate Natural products CCCOC(C)=O YKYONYBAUNKHLG-UHFFFAOYSA-N 0.000 description 1
- 239000002071 nanotube Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920002480 polybenzimidazole Polymers 0.000 description 1
- 150000004291 polyenes Chemical class 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 229940090181 propyl acetate Drugs 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 239000012488 sample solution Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
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
- H01M50/463—Separators, membranes or diaphragms characterised by their shape
-
- 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
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/431—Inorganic material
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Cell Separators (AREA)
- Secondary Cells (AREA)
- Filling, Topping-Up Batteries (AREA)
Abstract
The utility model provides a kind of lithium ion battery separator, and dividing plate includes non-woven fabrics base material and assigns the inorganic particle layer in the non-woven fabrics base material, has groove on the surface of the inorganic particle layer.The dividing plate is preferably that defined injecting electrolytic solution direction and the groove angulation of the lithium ion battery comprising the lithium ion battery separator are 70 °~+70 °.Accordingly, there is provided it is a kind of just can be manufactured without using numerous and diverse process, the absorbency of electrolyte is excellent and then the dividing plate of efficient activity that fluid injection can be realized when using the dividing plate to manufacture battery.
Description
Technical field
It the utility model is related to lithium ion battery separator.
Background technology
In lithium ion battery (situation for existing below referred to as " battery "), in order to prevent the contact between pole plate, use
Lithium ion battery separator (situation for existing below referred to as " dividing plate ").
Lithium ion battery is manufactured by procedure below.First, will be obtained by the overlapping winding of positive pole and negative pole and dividing plate
To coiling body or as obtained from positive pole and the stacking of negative pole and dividing plate the assembly of layered product etc. is inserted into outer wrapper
In.Then, after the opening portion of outer wrapper is closed, from liquid injection port filling electrolyte.Finally, liquid injection port is sealed.
For the fluid injection of electrolyte, it is necessary to make electrolyte be impregnated into be made up of positive pole and negative pole and dividing plate it is whole
Assembly.But the gap between positive pole and negative pole and dividing plate is very narrow.Therefore, in order that electrolyte is thoroughly impregnated to whole
Individual assembly, spends the time very much.
For the problem, as the fill method of electrolyte, in addition to using the electrolyte filling method fallen naturally, also exist
Shorten the electrolyte filling method of fluid injection time using centrifugal force, decompression or vacuum.But seeking further fluid injection
Efficient activity.
In patent document 1, by being roughened baffle surface, so as to improve the impregnability of electrolyte.But dividing plate table
The roughening in face is carried out by friction treatment, therefore process is present and become numerous and diverse such problem.
Citation
Patent document
Patent document 1：JP Laid-Open 6-333550 publications
Utility model content
Problem of the present utility model is, there is provided it is a kind of can just be manufactured without using numerous and diverse process, the imbibition of electrolyte
Property it is excellent and when using the diaphragm manufacture battery, the dividing plate of the efficient activity of fluid injection can be realized.
Above-mentioned problem is resolved by following means.
(1) a kind of lithium ion battery separator, comprising non-woven fabrics base material and the inorganic particulate in the non-woven fabrics base material is assigned
Layer, has groove on the surface of the inorganic particle layer.
(2) lithium ion battery separator according to above-mentioned (1), the lithium ion battery of the lithium ion battery separator is included
Defined injecting electrolytic solution direction and the groove angulation be -70 °~+70 °.
(3) lithium ion battery separator according to above-mentioned (1) or (2), the inorganic particle layer are only endowed described
The one side of non-woven fabrics base material.
(4) lithium ion battery separator according to above-mentioned (1) or (2), the inorganic particle layer are endowed in the nothing
Spin the two sides of cloth base material.
(5) lithium ion battery separator according to any one of above-mentioned (1)~(4), the inorganic particle layer include flat
The inorganic particulate that equal particle diameter is more than 0.5 μm and less than 4.0 μm.
(6) lithium ion battery separator according to any one of above-mentioned (1)~(4), the inorganic particle layer include flat
Equal particle diameter is 0.5 μm less than 3.0 μm of inorganic particulate.
(7) lithium ion battery separator according to any one of above-mentioned (1)~(4), the inorganic particle layer have bag
Inorganic particle layer A containing the inorganic particulate that average grain diameter is more than 2.0 μm and less than 4.0 μm and be 0.5 μm comprising average grain diameter
Less than the inorganic particle layer B of 2.0 μm of inorganic particulates.
(8) lithium ion battery separator according to above-mentioned (7), there is the one side in the non-woven fabrics base material to stack gradually
The inorganic particle layer A and inorganic particle layer B composition.
(9) lithium ion battery separator according to above-mentioned (7), there is the institute assigned in the one side of the non-woven fabrics base material
State inorganic particle layer A and assign the inorganic particle layer B on the another side of the non-woven fabrics base material.
(10) lithium ion battery separator according to any one of above-mentioned (1)~(9), the inorganic particle layer include from
More than one the inorganic particulate selected in the group being made up of aluminium compound and magnesium compound.
(11) lithium ion battery separator according to any one of above-mentioned (1)~(9), the inorganic particle layer include magnesium
Compound.
(12) lithium ion battery separator according to above-mentioned (10) or (11), the magnesium compound are magnesium hydroxide.
(13) lithium ion battery separator according to any one of above-mentioned (1)~(12), the non-woven fabrics base material include
Fibrillation heat resistant fibre.
(14) lithium ion battery separator according to above-mentioned (13), the political reform freedom of the fibrillation heat resistant fibre
For below 300ml.
Political reform freedom：Except using line footpath 0.14mm, aperture 0.18mm 80 mesh wire nettings as sieve plate and will try
Sample concentration is set as outside 0.1%, it then follows the value that JIS P8121-2 are measured.
(15) lithium ion battery separator according to above-mentioned (13) or (14), the fibrillation heat resistant fibre are fibril
Change fully aromatic polyamide fiber.
Utility model effect
According to the utility model, can obtain without using numerous and diverse process can obtain electrolyte absorbency it is excellent every
The effect of plate and can be realized when using the dividing plate to manufacture battery fluid injection efficient activity effect.
Brief description of the drawings
Fig. 1 is the schematic diagram for illustrating the fluid injection direction on dividing plate and groove angulation.
Fig. 2 is the general profile chart of one for showing to have slotted dividing plate on the surface of inorganic particle layer.
1 lithium ion battery separator
The overhead of 2 grooves
3 fluid injection directions
4 fluid injection directions and the angle (acute angle) of groove
5 fluid injection directions and the angle (obtuse angle) of groove
11 grooves
12 inorganic particle layers
13 non-woven fabrics base materials
The height of 14 grooves
The height of 15 inorganic particle layers
Embodiment
Dividing plate of the present utility model is characterised by, comprising non-woven fabrics base material and assigns the inorganic particulate in non-woven fabrics base material
Layer, also, there is groove on the surface of inorganic particle layer.
The inorganic particle layer in non-woven fabrics base material is assigned, by including inorganic particulate in the surface of non-woven fabrics base material, imparting
Liquid (existing below the situation for being designated as " coating liquid ") and be dried and obtain.Inorganic particle layer both can be assigned only in nothing
The one side of cloth base material is spun, can also be assigned on the two sides of non-woven fabrics base material.In addition, inorganic particle layer both can be individual layer, also may be used
To be multilayer.In the case of multiple layers, the inorganic particulate that each layer is included can be with identical.But the inorganic grain that each layer is included
Species, average grain diameter, the shape etc. of son can also be different from each other.
As inorganic particulate, silica can be used；The aluminum oxide of Alpha-alumina, beta-alumina, gama-alumina etc.；
The aluminum oxide water and thing of boehmite etc.；Aluminium hydroxide；The magnesium compound of magnesium hydroxide, magnesia etc.；Calcium oxide etc..These are worked as
In, in the high this respect of stability relative to the electrolyte for lithium ion battery, preferably from by aluminum oxide, aluminum oxide water and
More than a kind of the inorganic particulate selected in the group that the aluminium compound and magnesium compound of thing, aluminium hydroxide etc. are formed.In addition,
Suppress and the reaction this respect of electrolyte and absorbency also efficient activity this respect, more preferably magnesium compound, further preferred hydrogen
Magnesia.
In order to obtain the effect that can make the absorbency efficient activity of electrolyte by capillarity, inorganic particle layer is excellent
Choosing includes the inorganic particulate that average grain diameter is more than 0.5 μm and less than 4.0 μm.Average grain diameter by inorganic particulate is 0.5 μm
Above and less than 4.0 μm, so as to which absorbency becomes easy efficient activity.The average grain diameter of inorganic particulate is more preferably less than 3.7 μm,
More preferably less than 3.5 μm, particularly preferably less than 3.0 μm.
In addition, more preferably, inorganic particle layer has：It is more than 2.0 μm and less than 4.0 μm inorganic comprising average grain diameter
The inorganic particle layer A of particle and be 0.5 μm of inorganic particle layer less than 2.0 μm of inorganic particulate comprising average grain diameter
B.As the example of the dividing plate with inorganic particle layer A and inorganic particle layer B, can enumerate with the one side in non-woven fabrics base material
Be sequentially laminated with inorganic particle layer A and inorganic particle layer B composition dividing plate (8), have non-woven fabrics base material one side successively
It is laminated with the dividing plate of inorganic particle layer B and inorganic particle layer A composition and is formed with the one side assigned in non-woven fabrics base material
Inorganic particle layer A and assign the inorganic particle layer B dividing plate (9) formed on another side.Wherein, further preferred dividing plate
And (9) (8).
In order to obtain the effect that can make the absorbency efficient activity of electrolyte by capillarity, inorganic particle layer A
In the average grain diameter of inorganic particulate be more preferably more than 2.2 μm and less than 3.7 μm, more preferably more than 2.5 μm and 3.5
Below μm.In addition, the average grain diameter of the inorganic particulate in inorganic particle layer B is more preferably more than 0.5 μm and less than 1.5 μm, enter
One step is preferably more than 0.5 μm and less than 1.3 μm, particularly preferably more than 0.5 μm and less than 1.0 μm.
Inorganic particle layer and coating liquid are in addition to comprising inorganic particulate, additionally it is possible to include adhesive resin.As energy
The example of the adhesive resin enough used, styrene-butadiene resins, acrylate, methacrylate can be enumerated
Fluororesin of resin, polyvinylidene fluoride etc. etc., various synthetic resin.
Average grain diameter in the utility model, refer to according to the body asked for based on the particle size distribution measurement of laser diffractometry
Product benchmark median particle diameter (D50).
In addition, as in inorganic particle layer and coating liquid, in addition to inorganic particulate and adhesive resin, according to
The example of additive that can also be mixed is needed, can also enumerate the dispersant of polyacrylic acid, sodium carboxymethylcellulose etc.；Hydroxyl second
The tackifier of base cellulose, sodium carboxymethylcellulose, PEO etc.；Wetting agent；Preservative；Defoamer etc..
In the utility model, the adiabatic drying coating amount of inorganic particle layer is preferably 5g/m2Above and 30g/m2Hereinafter,
More preferably 10g/m2Above and 20g/m2Below.It is 5g/m by adiabatic drying coating amount2More than, so as to nonwoven fabric base
Material surface is easily fully coated by inorganic particle layer, thus easily prevents internal short-circuit.In addition, it is by adiabatic drying coating amount
30g/m2Hereinafter, so as to suppressing the rising of internal resistance.
The adiabatic drying coating amount of inorganic particle layer A in dividing plate with inorganic particle layer A and inorganic particle layer B is preferred
For 2.0g/m2Above and 10.0g/m2Hereinafter, more preferably 2.5g/m2Above and 8.0g/m2Hereinafter, more preferably 3.0g/
m2Above and 6.0g/m2Below.The absolute of inorganic particle layer B in dividing plate with inorganic particle layer A and inorganic particle layer B is done
Dry coating amount is preferably 2.5g/m2Above and 10.0g/m2Hereinafter, more preferably 3.0g/m2Above and 8.5g/m2Hereinafter, one is entered
Step is preferably 3.5g/m2Above and 7.0g/m2Below.Adiabatic drying coating amount by inorganic particle layer A is 2.0g/m2More than,
And inorganic particle layer B adiabatic drying coating amount is 2.5g/m2More than, so as to which non-woven fabrics base material surface is easily by inorganic particulate
Layer fully cladding, easily prevents internal short-circuit.In addition, applied by inorganic particle layer A and inorganic particle layer B adiabatic drying
Measure as 10.0g/m2Hereinafter, so as to suppressing the rising of internal resistance.
Coating amount of the inorganic particle layer A coating amount compared to inorganic particle layer B is preferably identical or less.Inorganic
In the case of coating amount of the particle layer A coating amount more than inorganic particle layer B, the bigger inorganic particulate of average grain diameter contains
Amount increases.Thus, the thickness of dividing plate is sometimes thickening.
The ratio (=inorganic particle layer A coating amount/inorganic grain of inorganic particle layer A and inorganic particle layer B coating amount
Sublayer B coating amount), preferably more than 0.23 and less than 1.00, more preferably 0.33 less than 0.95, further preferably
For 0.43 less than 0.90.By the ratio of inorganic particle layer A and inorganic particle layer B coating amount be more than 0.23 and
Less than 1.00, so as to which dividing plate will not become blocked up, and it is not likely to produce pin hole.
In the utility model, as the fiber for forming non-woven fabrics base material, it can illustrate by the polyene of polypropylene, polyethylene etc.
Hydrocarbon；The polyester of polyethylene terephthalate, polyethylene glycol isophthalate and PEN etc.；
The acrylic acid of polyacrylonitrile etc.；More than a kind of synthetic resin among polyamide of 6,6 nylon, 6 nylon etc. etc. is formed, and
The synthetic resin chopped fiber not being readily fibrillated.Among these, for reasons such as heat resistance, agent of low hygroscopicity, preferably using polyester
Fiber or polypropylene fibre.In addition, in addition to the synthetic resin chopped fiber, it is preferably also fine comprising fibrillation heat resistance
Dimension.By comprising fibrillation heat resistant fibre, being impregnated with so as to suppress coating liquid to the excessive of non-woven fabrics base material.Therefore,
The formation of groove becomes easy.Moreover, by fibrillation heat resistant fibre, it can assign dividing plate higher heat resistance.In addition, nonwoven
Cloth base material can also include the various cellulose pulps of wood pulp, jute pulp, cotton pulp etc.；The cellulose base of artificial silk, lyocell etc. is again
Raw fiber etc..
In the utility model, the fibre diameter of synthetic resin chopped fiber is preferably in the model of more than 1 μm and less than 8 μm
Enclose.By for more than 1 μm, so as to easily suppress the rising of internal resistance.In addition, by for less than 8 μm, so as to the painting assigned
Deposited liquid is difficult to come off from non-woven fabrics base material.
Synthetic resin chopped fiber both can be the fiber (single fiber) that is made up of single resin or by two kinds with
On resin form composite fibre.In addition, non-woven fabrics base material of the present utility model can both include a kind of short fibre of synthetic resin
Dimension, can also include the combination of two or more synthetic resin chopped fibers.As the example of composite fibre, core sheath can be enumerated
Type, core shift type, parallel type, fabric of island-in-sea type, orange type and bimetal composite.
The fibre length of synthetic resin chopped fiber is preferably more than 1mm and below 10mm, more preferably more than 1mm and 5mm
Below.In the case where fibre length is more than 10mm, it sometimes appear that quality is bad.On the other hand, it is less than 1mm in fibre length
In the case of, the mechanical strength of non-woven fabrics base material reduces, and non-woven fabrics base material breakage when forming inorganic particle layer be present.
As the example of the fibrillation heat resistant fibre used in the utility model, can enumerate by all aromatic polyamides
Amine, Wholly aromatic polyester, polyimides, polyamidoimide, polyether-ether-ketone, polyphenylene sulfide, polybenzimidazoles, poly- p- Asias benzene
The fibrillating fibre that the heat-resistant resin of base benzo dithiazole, poly- p- phenylenes benzo dioxazole, polytetrafluoroethylene (PTFE) etc. is formed.
Among these, due to the compatibility of electrolyte is higher, easy fibrillation, thus preferred fully aromatic polyamide.
The political reform freedom of fibrillation heat resistant fibre in the utility model is 0~300ml, preferably 0~200ml,
More preferably 0~100ml.If political reform freedom is wide more than 300ml, the fiber of the dry fibers of fibrillation heat resistant fibre
Degree is thicker, there is a situation where to be difficult to the thickness that non-woven fabrics base material is thinned.And then due to viscous with other fibers such as adhesive fiber
Contact is reduced, therefore the intensity that non-woven fabrics base material be present declines situation and is difficult to suppress mistake of the coating liquid to non-woven fabrics base material
Spend situation about being impregnated with.
In the utility model, so-called political reform freedom, refer to except 80 mesh using line footpath 0.14mm, aperture 0.18mm
Wire netting is set as outside 0.1 mass % that other follow JIS P8121-2 to be surveyed as sieve plate and by sample solution concentration
Value obtained from amount.
The mass-weighted average fibre length of fibrillation heat resistant fibre is preferably more than 0.02mm and below 1.00mm.This
Outside, the length weighted average fiber length of fibrillation heat resistant fibre is preferably more than 0.02mm and below 0.50mm.Average
In the case that fibre length is shorter than preferred scope, that fibrillation heat resistant fibre comes off from non-woven fabrics base material be present.Flat
In the case that equal fibre length is longer than preferable scope, there is a situation where to be difficult to the thickness that non-woven fabrics base material is thinned.
There is above-mentioned mass-weighted average fibre length and length weighted average fiber length in fibrillation heat resistant fibre
In the case of degree, in the case that the containing ratio for the fibrillation heat resistant fibre that non-woven fabrics base material is included is less, in original
Between fibrillation heat resistant fibre or between fibrillation heat resistant fibre and synthetic resin chopped fiber, it can also be formed based on fiber
Fine and close network structure.Therefore, be readily obtained can improve intensity, can thickness thinning, can easily suppress coating liquid pair
The non-woven fabrics base material being excessively impregnated with of non-woven fabrics base material.
In the utility model, the mass-weighted average fibre length and length weight of fibrillation heat resistant fibre are averaged
Fibre length, it is in projected fiber length by using KajaaniFiberLabV3.5 (Metso Automation societies system)
(Proj) be measured under pattern, mass-weighted average fibre length (L (w)) and length weighted average fiber length
Spend (L (1)).
The average fiber width of fibrillation heat resistant fibre is preferably more than 0.5 μm and less than 20.0 μm, more preferably 3.0
More than μm and less than 16.0 μm, more preferably more than 5.0 μm and less than 15.0 μm.In average fiber width more than 20.0 μm
In the case of, there is a situation where to be difficult to the thickness that non-woven fabrics base material is thinned.In addition, it is less than 0.5 μm of feelings in average fiber width
Under condition, there is a situation where to come off from non-woven fabrics base material.
In the utility model, the average fiber width of fibrillation heat resistant fibre, be by using
Fiber width (the Fiber that KajaaniFiberLabV3.5 (Metso Automation societies system) is measured
Width)。
Fibrillation heat resistant fibre can be by using fiberizer, beater, pulverizer, grinding mechanism, the rotation by high speed
Rotor sword come provide the rotary type homogenizer of shearing force, high speed rotation the interior blade of cylinder and the outer blade of fixation between producing
The high-speed homogenizer of double drum type brakes of raw shearing force, pass through impacting to carry out the ultrasonic disruption of miniaturization based on ultrasonic wave
Machine or by fiber suspension apply at least 20MPa pressure differential come be passed to the throttle orifice of path and as at a high speed,
Collide it and suddenly slow down, so as to apply high-pressure homogenizer of shearing force and cut-out power etc. to fiber, heat resistance fiber is carried out
Handle and obtain.
In the case where non-woven fabrics base material includes fibrillation heat resistant fibre, the whole that is included relative to non-woven fabrics base material
Fibre composition, the containing ratio of fibrillation heat resistant fibre are preferably 1.0 mass % less than 5.0 mass %, more preferably
More than 2.0 mass %, more preferably more than 3.0 mass %.In addition, the containing ratio of fibrillation heat resistant fibre is preferably small
In 4.5 mass %.In the case where the containing ratio of fibrillation heat resistant fibre is more than 5.0 mass %, exist in order to which nothing is thinned
Spin the thickness of cloth base material and roll the situation that non-woven fabrics base material becomes difficult, or tensile strength deterioration be present.It is another
Aspect, in the case where the containing ratio of fibrillation heat resistant fibre is less than 1.0 mass %, and not comprising fibrillation heat resistant fibre
Non-woven fabrics base material compare, the formation easness of groove is simultaneously unchanged.
In the case where non-woven fabrics base material includes fibrillation heat resistant fibre, the whole that is included relative to non-woven fabrics base material
Fibre composition, the containing ratio of synthetic resin chopped fiber is preferably more than 90.0 mass %, more preferably more than 92.0 mass %, is entered
One step is preferably more than 94.0 mass %, particularly preferably more than 95.0 mass %.In addition, the containing ratio of synthetic resin chopped fiber
Preferably below 99.0 mass %, more preferably below 98.0 mass %, more preferably below 96.0 mass %.Synthesizing
In the case that resin chopped fiber is more than 99.0 mass %, compared with the non-woven fabrics base material not comprising fibrillation heat resistant fibre,
The formation easness of groove is simultaneously unchanged.On the other hand, in the case where synthetic resin chopped fiber is less than 90.0 mass %, reducing
In the case of the base weight of non-woven fabrics base material, because mechanical strength reduces, therefore the nonwoven fabric base when forming inorganic particle layer sometimes
Material can be damaged.
In the utility model, the base of non-woven fabrics base material is preferably 5~30g/m again2, more preferably 6~20g/m2.Pass through
Base weight is 5g/m2More than, so as to be readily obtained the uniformity of non-woven fabrics base material.In addition, it is 30g/m by base weight2Hereinafter, so as to
It is readily obtained the thickness suitable for lithium ion battery separator.In addition, the thickness of non-woven fabrics base material is preferably 7~45 μm.If non-woven fabrics
The thickness of base material is then readily obtained the thickness suitable for lithium ion battery separator in the scope after coating.
As the method for manufacture non-woven fabrics base material, it is each that spun-bond process, meltblown, electrospinning process, damp process etc. can be illustrated
Kind manufacture method.In these methods, due to thin and dense structure, therefore preferred damp process can be obtained.As to fiber
Between the method that is engaged, can be in various methods such as Exemplary chemical Method for bonding, hot melt connections.In these methods, because can
The non-woven fabrics base material of smooth surface is obtained, it is advantageous to heat connection.
In the utility model, as the method for forming groove on the surface of inorganic particle layer, gravure coating can be illustrated.It is logical
Gravure coating is crossed, compared with friction treatment etc., groove can be simply formed.Specifically, the gravure roll for gravure coating
As long as shape can inorganic particle layer formed groove, then be not particularly limited.However, it is preferred to the intaglio plate of the groove with oblique line shape
Roller.Thus, have slotted overlay and be imparted into non-woven fabrics base material, and dried.Thus, formed on the surface of inorganic particle layer
Groove.The material of gravure roll is not particularly limited.In order to improve the resistance to abrasion of gravure roll, gravure roller surface preferably passes through hard chrome plating
Or the metal oxide such as chromium oxide thermal spraying is surface-treated.
In order to form groove on the surface of inorganic particle layer, the Type B viscosity of coating liquid is preferably more than 500mPas.Pass through B
Type viscosity is more than 500mPas, so as to be readily derived dividing plate of the present utility model.If the Type B viscosity of coating liquid is low
Groove is lost in 500mPas, then in during being imparted into non-woven fabrics base material to drying from coating liquid, groove levelling, so
Effect of the present utility model can not be obtained.In addition, Type B viscosity is under 25 DEG C, Spindle No.2,12rpm, glued using Type B
Degree meter (East capital gauge system, pattern BL), based on JIS K 7117；1999 values being measured.The Type B viscosity of coating liquid
Preferably more than 600mPas, more preferably more than 700mPas.If the Type B viscosity of coating liquid is in the scope,
The levelling of coating liquid can further be suppressed, the formation of groove can become easy.If the Type B viscosity of coating liquid is more than 3000mPa
S, then apply inherently highly difficult.
Defined fluid injection when injecting from electrolyte to the lithium ion battery with lithium ion battery separator of the present utility model
Direction is preferably -70 °~+70 ° with groove angulation.As long as in the scope, fluid injection will be more easily achieved in fluid injection angle
The effect that efficiency improves.Fig. 1 is for illustrating the fluid injection direction in dividing plate 1 and the interval between groove angulation and overhead
Schematic diagram.Fluid injection direction is with groove angulation 4 and angle 5 by measuring the continuous lines in fluid injection direction 3 and the crown of groove
The continuous lines angulation in portion 2 is asked for.In fluid injection direction and groove angulation, (the acute angle of symbol 4 be present：± 90 °~
0 °) and (obtuse angle of symbol 5：± 90 °~180 °).But the fluid injection direction in the utility model and groove angulation are symbols 4
(acute angle).That is, the fluid injection direction in the utility model is in ± 90 °~0 ° of scope with groove angulation.It is in addition, so-called
"-", it is meant that the angle is located at right side, so-called "+" relative to fluid injection direction, it is meant that the angle is located at relative to fluid injection direction
Left side.Such as Fig. 1 angle 4 is "+".Fig. 2 is one of the dividing plate for showing to have groove 11 on the surface of inorganic particle layer 12
General profile chart.
The height 14 of groove relative to the height of inorganic particle layer ratio, preferably 15 more than 0.1% and 99.0% with
Under.When the ratio is more than 0.1%, compared with the dividing plate of no groove 11, the absorbency of electrolyte improves.It is big in the ratio
In the case of 99.0%, in the bottom of groove 11, that non-woven fabrics base material 13 is not coated fully by inorganic particle layer 12 be present.
In addition, in the case of forming inorganic particle layer 12 in the coating liquid by being imparted to non-woven fabrics base material 13, inorganic particle layer 12
A part can be impregnated into non-woven fabrics base material 13.Here, so-called " height of inorganic particle layer ", refer to not include and be impregnated into nonwoven
The height of the inorganic particle layer 12 of part in cloth base material 13.The interval of groove and the quantity of groove are all not particularly limited.In addition,
Fluid injection direction and groove angulation, the height of groove, the interval of groove, groove quantity etc. can by change gravure roll shape,
Coating speed, the rotary speed of gravure roll, Type B viscosity of coating liquid etc. are adjusted.
In addition, lithium ion battery manufactures in the following way：The electrode group that will be made up of positive pole, dividing plate and negative pole
It is attached in battery unit, next, after injecting electrolyte into unit, the inlet of electrolyte is sealed.As electrode
The structure of group, cascade type structure and winding type structure both be main flow.In any one structure, in most instances,
All be clip dividing plate 1 along machine direction (Machine Direction；MD, flow direction, longitudinal direction or long side direction)
End face, expose the end face of positive pole and negative pole.Then, by injecting electrolyte from these end face sides, so as to make injection
Speed ratio is very fast.Therefore, along dividing plate 1 machine direction end face side towards inlet.As a result, usually, the note shown in Fig. 1
Liquid direction 3 turns into crisscross (the Cross Direction of dividing plate 1；CD, transverse direction).
In the utility model, the base of dividing plate is preferably 10~60g/m again2, more preferably 16~40g/m2.It is in base weight
10g/m2During the above, uniformity is readily obtained, easily prevents internal short-circuit in addition.In addition, it is 60g/m by base weight2Hereinafter, from
And it is readily obtained the thickness suitable for lithium ion battery separator.In addition, the thickness of dividing plate is preferably 10~60 μm.
Lithium ion battery in the utility model means lithium rechargeable battery or lithium ion polymer secondary cell.
The negative electrode active material of lithium ion battery does not have any restrictions.However, it is preferred to be, using carrying out inhaling storage and release to lithium ion
When equilibrium potential be the negative electrode active materials of 1V (vsLi+/Li) below.By using such negative electrode active material, so that
The larger battery of the larger energy that can store of the potential difference between both positive and negative polarity can be obtained.As workable for meeting the condition
The example of negative electrode active material, graphite, hard carbon, low-crystalline carbon, the graphite that amorphous carbon is coated with to graphite, carbon can be enumerated
The carbonaceous material such as nanotube or their mixture.In addition, carbon-based material can not only be used, additionally it is possible to using containing Si,
Sn or N etc. negative material.As positive active material, as long as reversibly lithium ion can be carried out to inhale storage and release
Material, then be not particularly limited.As an example, cobalt acid lithium (LiCoO can be enumerated2), lithium nickelate (LiNiO2), spinel-type
LiMn2O4 (LiMn2O4), by formula：LiNixCoyMnzO2(x+y+z=1) metal composite oxide and lithium vanadium chemical combination represented
Thing (LiV2O5), olivine-type LiMPO4The metal composite oxide of (wherein, M represents Co, Ni, Mn or Fe).
Lithium ion battery can be manufactured by procedure below.First, dividing plate will be configured between positive pole and negative pole
In the state of, overlapping winding is carried out to positive pole and negative pole and dividing plate and obtain coiling body or by positive pole and negative pole and every
The assembly of layered product etc. is inserted into outer wrapper obtained from flaggy is folded.Then, enclose outer wrapper opening portion it
Afterwards, from liquid injection port filling electrolyte.Finally, liquid injection port is sealed.By using being imparted to the inorganic particle layer of non-woven fabrics base material
Surface have slotted dividing plate of the present utility model and be preferably to make assembly to cause fluid injection direction and groove angulation
4 turn into ± 70 °~0 °, so as to shorten the time needed for the fluid injection of electrolyte.
The electrolyte of lithium ion battery usually contains the lithium salts as electrolyte and the carbonic ester conduct as main solvent
Necessary composition, and as needed, the secondary solvent such as fatty acid ester also comprising 0~20 mass %, for improving battery behavior
Additive etc..On the lithium salts as electrolyte, most commonly be lithium hexafluoro phosphate (LiPF6).But there is also use four
Lithium fluoroborate (LiBF4) etc. situation.On the carbonic ester as main solvent, mainly using propylene carbonate, ethylene carbonate,
Diethyl carbonate, dimethyl carbonate or methyl ethyl carbonate.Using in the case of secondary solvent, typically using ethyl acetate,
The fatty acid esters such as propyl acetate, ethyl propionate.As additive, vinylene carbonate, propane sultone etc. are used.It is molten as master
The carbonic ester of agent is mutually similar for the dissolubility of various materials.Therefore, it is dissolved in the material of a kind of carbonic ester in most cases,
Also other carbonic esters or their mixed solvent are dissolved in.In addition, electrolyte can also be also comprising polyethylene glycol, its derivative
The gel of thing, polymethacrylate derivative, polysiloxanes, its derivative or polyvinylidene fluoride etc..
【Embodiment】
Embodiment is exemplified below to illustrate the utility model.But the utility model is not by these embodiments
Any restriction.In addition, in embodiment, unless otherwise instructed, then % and part are all quality criterias.In addition, coating amount is
Adiabatic drying coating amount.And then fluid injection direction is the CD (transverse direction) of dividing plate.
Non-woven fabrics base material A making
Make fiber number 0.06dtex (2.4 μm of avarage fiber diameter) and fibre length 3mm directional crystallization by pulper
Polyethylene terephthalate (PET) is the mass parts of chopped fiber 40, fiber number 0.1dtex (3.0 μm of avarage fiber diameter) and fibre
Tie up the length 3mm mass parts of directional crystallization PET systems chopped fiber 20 and fiber number 0.2dtex (4.3 μm of avarage fiber diameter) and fibre
Dimension length 3mm single component type adhesive is dispersed in PET systems chopped fiber (120 DEG C of softening point, 230 DEG C of fusing point) 40 mass parts
In water, system slurry is copied so as to modulate the uniform of the mass % of concentration 1.Using apsacline paper machine, by damp process to this
Copy system and carry out the system of copying with slurry.By 135 DEG C of drum dryer, adhesive is set to be bonded with PET systems chopped fiber, so as to
Non-woven fabrics intensity is shown.In this way, base weight 12g/m has been obtained2Non-woven fabrics.And then using by sensing heating chuck roller
The nip formula hot pressing ray machine that (metal heating roller) and resilient roller are formed, at 200 DEG C of heat roller temperature, line pressure 100kN/m, place
Hot pressing light processing has been carried out to the non-woven fabrics under conditions of reason speed 30m/ minutes.Produce the non-woven fabrics base material A of 18 μm of thickness.
Non-woven fabrics base material B making
Make fiber number 0.06dtex (2.4 μm of avarage fiber diameter) and fibre length 3mm directional crystallization by pulper
Polyethylene terephthalate (PET) is the mass parts of chopped fiber 37, fiber number 0.1dtex (3.0 μm of avarage fiber diameter) and fibre
Tie up the length 3mm mass parts of directional crystallization PET systems chopped fiber 20 and fiber number 0.2dtex (4.3 μm of avarage fiber diameter) and fibre
Tie up length 3mm single component type adhesive with PET systems chopped fiber (120 DEG C of softening point, 230 DEG C of fusing point) 40 mass parts and
By using paper pulp of the high-pressure homogenizer to fully aromatic polyamide fiber, (average fiber length 1.7mm, average fiber are straight
10 μm of footpath) carry out fibrillation make it that the mass parts of fibrillation heat resistant fibre 3 are disperseed obtained from having 50ml political reform freedom
In water, system slurry is copied so as to modulate the uniform of the mass % of concentration 1.Using apsacline paper machine, pass through damp process pair
This is copied system and has carried out the system of copying with slurry.By 135 DEG C of drum dryer, adhesive is set to be bonded with PET systems chopped fiber, from
And non-woven fabrics intensity is shown.In this way, base weight 12g/m has been obtained2Non-woven fabrics.And then using by sensing heating chuck
The nip formula hot pressing ray machine that roller (metal heating roller) and resilient roller are formed, in 200 DEG C of heat roller temperature, line pressure 100kN/m,
Hot pressing light processing has been carried out to the non-woven fabrics under conditions of processing speed 30m/ minutes.Produce the non-woven fabrics base material of 18 μm of thickness
B。
Non-woven fabrics base material C making
Make fiber number 0.06dtex (2.4 μm of avarage fiber diameter) and fibre length 3mm directional crystallization by pulper
Polyethylene terephthalate (PET) is the mass parts of chopped fiber 37, fiber number 0.1dtex (3.0 μm of avarage fiber diameter) and fibre
Tie up the length 3mm mass parts of directional crystallization PET systems chopped fiber 20 and fiber number 0.2dtex (4.3 μm of avarage fiber diameter) and fibre
Tie up length 3mm single component type adhesive with PET systems chopped fiber (120 DEG C of softening point, 230 DEG C of fusing point) 40 mass parts and
By using paper pulp of the high-pressure homogenizer to fully aromatic polyamide fiber, (average fiber length 1.7mm, average fiber are straight
10 μm of footpath) carry out fibrillation make it that the mass parts of fibrillation heat resistant fibre 3 are disperseed obtained from having 250ml political reform freedom
In water, system slurry is copied so as to modulate the uniform of the mass % of concentration 1, is in addition made identically with non-woven fabrics base material B
Non-woven fabrics base material C is made.
Non-woven fabrics base material D making
Make fiber number 0.06dtex (2.4 μm of avarage fiber diameter) and fibre length 3mm directional crystallization by pulper
Polyethylene terephthalate (PET) is the mass parts of chopped fiber 37, fiber number 0.1dtex (3.0 μm of avarage fiber diameter) and fibre
Tie up the length 3mm mass parts of directional crystallization PET systems chopped fiber 20 and fiber number 0.2dtex (4.3 μm of avarage fiber diameter) and fibre
Tie up length 3mm single component type adhesive with PET systems chopped fiber (120 DEG C of softening point, 230 DEG C of fusing point) 40 mass parts and
By using paper pulp of the high-pressure homogenizer to fully aromatic polyamide fiber, (average fiber length 1.7mm, average fiber are straight
10 μm of footpath) carry out fibrillation make it that the mass parts of fibrillation heat resistant fibre 3 are disperseed obtained from having 320ml political reform freedom
In water, system slurry is copied so as to modulate the uniform of the mass % of concentration 1, in addition by identical with non-woven fabrics base material B
Method and produce non-woven fabrics base material D.
Coating liquid A making
Pass through the vigorous of 2.3 μm of the average grain diameter of the primary particle of the cohesion comprising 0.7 μm of particle diameter that makes to be used as inorganic particulate
100 parts of the offspring of nurse stone " is scattered to be that its 1 mass % aqueous solution at 25 DEG C has the carboxymethyl of 200mPas viscosity
In 120 parts of 0.3% aqueous solution of cellulose sodium salt, and fully it is stirred, so as to produce boehmite dispersion.Then, mix
There is 0.5% aqueous solution of the sanlose of 7000mPas viscosity together in its 1 mass % aqueous solution at 25 DEG C
200 parts and stirred.And then by mixing and stirring the latex macromolecule 15 of 45% styrene/butadiene copolymers
Part is used as adhesive, so as to produce coating liquid.In addition, coating liquid A Type B viscosity is 1000mPas.
Coating liquid B making
Except used its 1 mass % aqueous solution at 25 DEG C have 7000mPas viscosity sanlose
0.5 120 parts of the mass % aqueous solution beyond, by having made coating liquid B with coating liquid A identicals method.In addition, coating liquid
B Type B viscosity is 400mPas.Coating liquid B due to compared with coating liquid A viscosity it is relatively low, therefore do not form groove.
Coating liquid C making
100 parts of the magnesium hydroxide of 0.1 μm of average grain diameter has been used as inorganic particulate, in addition by with coating liquid
A identicals method has made coating liquid C.In addition, coating liquid C Type B viscosity is 1000mPas.
Coating liquid D making
100 parts of the magnesium hydroxide of 0.5 μm of average grain diameter has been used as inorganic particulate, in addition by with coating liquid
A identicals method has made coating liquid D.In addition, coating liquid D Type B viscosity is 1000mPas.
Coating liquid E making
100 parts of the magnesium hydroxide of 2.0 μm of average grain diameter has been used as inorganic particulate, in addition by with coating liquid
A identicals method has made coating liquid E.In addition, coating liquid E Type B viscosity is 1000mPas.
Coating liquid F making
100 parts of the magnesium hydroxide of 3.0 μm of average grain diameter has been used as inorganic particulate, in addition by with coating liquid
A identicals method has made coating liquid F.In addition, coating liquid F Type B viscosity is 1000mPas.
Embodiment 1
In non-woven fabrics base material A one side, applied using the intaglio plate (Gravure) of reverse contact (Kiss Reverse) mode
Cloth machine (KRG) carrys out coating liquid coating A and is dried so that adiabatic drying coating amount turns into 16g/m2, thus made thickness 36
μm dividing plate.Fluid injection direction is+40 ° with groove angulation 4.
Embodiment 2
In non-woven fabrics base material A one side, come coating liquid coating A and carried out using the gravure coater of the reverse way of contact
Dry and cause adiabatic drying coating amount to turn into 16g/m2, thus made the dividing plate of 36 μm of thickness.Formed by fluid injection direction and groove
Angle 4 is+70 °.
Embodiment 3
In non-woven fabrics base material A one side, come coating liquid coating A and carried out using the gravure coater of the reverse way of contact
Dry and cause adiabatic drying coating amount to turn into 16g/m2, thus made the dividing plate of 36 μm of thickness.Formed by fluid injection direction and groove
Angle 4 is+15 °.
Embodiment 4
In non-woven fabrics base material A one side, come coating liquid coating A and carried out using the gravure coater of the reverse way of contact
Dry and cause adiabatic drying coating amount to turn into 16g/m2, thus made the dividing plate of 36 μm of thickness.Formed by fluid injection direction and groove
Angle 4 is+80 °.
Comparative example 1
In non-woven fabrics base material A one side, come coating liquid coating B and carried out using the gravure coater of the reverse way of contact
Dry and cause adiabatic drying coating amount to turn into 16g/m2, thus made the dividing plate of 36 μm of thickness.Due to coating liquid B viscosity compared with
It is low, therefore groove is not formed.
Comparative example 2
In non-woven fabrics base material A one side, come coating liquid coating A and it is dried using mould (Die) coating machine so that absolutely
16g/m is turned into drying coated amount2, thus made the dividing plate of 36 μm of thickness.Groove is not formed.
Embodiment 5
In non-woven fabrics base material B one side, caused absolutely come coating liquid coating A using the gravure coater of the reverse way of contact
16g/m is turned into drying coated amount2, thus made the dividing plate of 36 μm of thickness.Fluid injection direction and groove angulation 4 for+
15°。
Embodiment 6
In non-woven fabrics base material B one side, come coating liquid coating D and carried out using the gravure coater of the reverse way of contact
Dry and cause adiabatic drying coating amount to turn into 16g/m2, thus made the dividing plate of 34 μm of thickness.Formed by fluid injection direction and groove
Angle 4 is+15 °.
Embodiment 7
In non-woven fabrics base material C one side, come coating liquid coating A and carried out using the gravure coater of the reverse way of contact
Dry and cause adiabatic drying coating amount to turn into 16g/m2, thus made the dividing plate of 36 μm of thickness.Formed by fluid injection direction and groove
Angle 4 is+15 °.
Embodiment 8
In non-woven fabrics base material D one side, come coating liquid coating A and carried out using the gravure coater of the reverse way of contact
Dry and cause adiabatic drying coating amount to turn into 16g/m2, thus made the dividing plate of 36 μm of thickness.Formed by fluid injection direction and groove
Angle 4 is+15 °.
Embodiment 9
In non-woven fabrics base material A one side, come coating liquid coating C and carried out using the gravure coater of the reverse way of contact
Dry and cause adiabatic drying coating amount to turn into 16g/m2, thus made the dividing plate of 33 μm of thickness.Formed by fluid injection direction and groove
Angle 4 is+15 °.
Embodiment 10
In non-woven fabrics base material A one side, come coating liquid coating E and carried out using the gravure coater of the reverse way of contact
Dry and cause adiabatic drying coating amount to turn into 16g/m2, thus made the dividing plate of 35 μm of thickness.Formed by fluid injection direction and groove
Angle 4 is+15 °.
Embodiment 11
In non-woven fabrics base material A one side, come coating liquid coating F and carried out using the gravure coater of the reverse way of contact
Dry and cause adiabatic drying coating amount to turn into 16g/m2, thus made the dividing plate of 37 μm of thickness.Formed by fluid injection direction and groove
Angle 4 is+15 °.
Embodiment 12
In non-woven fabrics base material A one side, come coating liquid coating A and carried out using the gravure coater of the reverse way of contact
Dry and cause adiabatic drying coating amount to turn into 8g/m2, then, on non-woven fabrics base material A another side, utilize the reverse way of contact
Gravure coater carry out coating liquid coating A and be dried so that adiabatic drying coating amount turns into 8g/m2, thus made thickness
35 μm of dividing plate.Fluid injection direction is+15 ° on two sides with groove angulation 4.
Embodiment 13
In non-woven fabrics base material A one side, come coating liquid coating F and carried out using the gravure coater of the reverse way of contact
Dry and cause adiabatic drying coating amount to turn into 8g/m2, and then, thereon, applied using the gravure coater of the reverse way of contact
Apply coating liquid D and be dried so that adiabatic drying coating amount turns into 8g/m2, thus made the dividing plate of 34 μm of thickness.Fluid injection
Direction is+15 ° with groove angulation 4.
Embodiment 14
In non-woven fabrics base material A one side, come coating liquid coating D and carried out using the gravure coater of the reverse way of contact
Dry and cause adiabatic drying coating amount to turn into 8g/m2, and then, thereon, applied using the gravure coater of the reverse way of contact
Apply coating liquid F and be dried so that adiabatic drying coating amount turns into 8g/m2, thus made the dividing plate of 34 μm of thickness.Fluid injection
Direction is+15 ° with groove angulation 4.
Embodiment 15
In non-woven fabrics base material A one side, come coating liquid coating F and carried out using the gravure coater of the reverse way of contact
Dry and cause adiabatic drying coating amount to turn into 8g/m2, then, on non-woven fabrics base material A another side, utilize the reverse way of contact
Gravure coater carry out coating liquid coating D and be dried so that adiabatic drying coating amount turns into 8g/m2, so as to make thickness
33 μm of dividing plate.Fluid injection direction is+15 ° on two sides with groove angulation 4.
Embodiment 16
In non-woven fabrics base material A one side, come coating liquid coating E and carried out using the gravure coater of the reverse way of contact
Dry and cause adiabatic drying coating amount to turn into 8g/m2, then, on non-woven fabrics base material A another side, utilize the reverse way of contact
Gravure coater carry out coating liquid coating E and be dried so that adiabatic drying coating amount turns into 8g/m2, thus made thickness
34 μm of dividing plate.Fluid injection direction is+15 ° on two sides with groove angulation 4.
Comparative example 3
In non-woven fabrics base material A one side, come coating liquid coating A and it is dried using mould coating machine so that adiabatic drying
Coating amount turns into 8g/m2, then, on non-woven fabrics base material A another side, come coating liquid coating A and carried out using mould coating machine
Dry and cause adiabatic drying coating amount to turn into 8g/m2, thus made the dividing plate of 35 μm of thickness.Groove is not formed.
Embodiment 17
In non-woven fabrics base material B one side, come coating liquid coating A and carried out using the gravure coater of the reverse way of contact
Dry and cause adiabatic drying coating amount to turn into 8g/m2, then, on non-woven fabrics base material B another side, utilize the reverse way of contact
Gravure coater carry out coating liquid coating A and be dried so that adiabatic drying coating amount turns into 8g/m2, thus made thickness
35 μm of dividing plate.Fluid injection direction is+15 ° on two sides with groove angulation 4.
Embodiment 18
In non-woven fabrics base material B one side, come coating liquid coating F and carried out using the gravure coater of the reverse way of contact
Dry and cause adiabatic drying coating amount to turn into 8g/m2, and then, thereon, applied using the gravure coater of the reverse way of contact
Apply coating liquid D and be dried so that adiabatic drying coating amount turns into 8g/m2, thus made the dividing plate of 34 μm of thickness.Fluid injection
Direction is+15 ° with groove angulation 4.
Embodiment 19
In non-woven fabrics base material B one side, come coating liquid coating F and carried out using the gravure coater of the reverse way of contact
Dry and cause adiabatic drying coating amount to turn into 8g/m2, then, on non-woven fabrics base material B another side, utilize the reverse way of contact
Gravure coater carry out coating liquid coating D and be dried so that adiabatic drying coating amount turns into 8g/m2, thus made thickness
33 μm of dividing plate.Fluid injection direction is+15 ° on two sides with groove angulation 4.
Embodiment 20
In non-woven fabrics base material B one side, come coating liquid coating E and carried out using the gravure coater of the reverse way of contact
Dry and cause adiabatic drying coating amount to turn into 8g/m2, then, on non-woven fabrics base material B another side, utilize the reverse way of contact
Gravure coater carry out coating liquid coating E and be dried so that adiabatic drying coating amount turns into 8g/m2, so as to make thickness
34 μm of dividing plate.Fluid injection direction is+15 ° on two sides with groove angulation 4.
The dividing plate made by embodiment 1~20 is made by gravure coating, and in the table of its inorganic particle layer
Face has groove, therefore does not need numerous and diverse post-processing after the drying and have the groove uniformly formed.On the other hand, in comparative example
In 1, coating liquid B viscosity is relatively low, and groove is not formed on the surface of inorganic particle layer.In comparative example 2 and 3, due to substitution
The gravure coater of the reverse way of contact and used mould coating machine, therefore do not form groove on the surface of inorganic particle layer.
＜ is evaluated>
[fluid injection]
As electrolyte, LiPF is used6Ethylene carbonate and diethyl carbonate 7/3 (Capacity Ratio) mixed solvent solution
(1mol/L).From made dividing plate, MD50mm × CD100mm sample is cut out.Under among the CD100mm of the sample
Portion 5mm is immersed in electrolyte so that the width MD directions of the sample and the liquid level of above-mentioned electrolyte are parallel to each other.Then, survey
The time untill electrolyte reaches the height away from electrolysis liquid surface 5mm of the sample has been measured as fluid injection.The value of the fluid injection is got over
Small, then the fluid injection for being evaluated as the dividing plate is better.
【Table 1】
| Non-woven fabrics base material | Coating liquid | Coating machine | Applicator surface | Angle ° | Thickness μm | The fluid injection second | |
| Embodiment 1 | A | A | KRG | Simultaneously | 40 | 36 | 35 |
| Embodiment 2 | A | A | KRG | Simultaneously | 70 | 36 | 38 |
| Embodiment 3 | A | A | KRG | Simultaneously | 15 | 36 | 20 |
| Embodiment 4 | A | A | KRG | Simultaneously | 80 | 36 | 48 |
| Comparative example 1 | A | B | KRG | Simultaneously | - | 36 | 50 |
| Comparative example 2 | A | A | Mould | Simultaneously | - | 36 | 51 |
| Embodiment 5 | B | A | KRG | Simultaneously | 15 | 36 | 16 |
| Embodiment 6 | B | D | KRG | Simultaneously | 15 | 34 | 14 |
| Embodiment 7 | C | A | KRG | Simultaneously | 15 | 36 | 17 |
| Embodiment 8 | D | A | KRG | Simultaneously | 15 | 36 | 19 |
| Embodiment 9 | A | C | KRG | Simultaneously | 15 | 33 | 16 |
| Embodiment 10 | A | E | KRG | Simultaneously | 15 | 35 | 15 |
| Embodiment 11 | A | F | KRG | Simultaneously | 15 | 37 | 23 |
| Embodiment 12 | A | A, A | KRG | Two sides | 15 | 35 | 33 |
| Embodiment 13 | A | F+D | KRG | Simultaneously | 15 | 34 | 17 |
| Embodiment 14 | A | D+F | KRG | Simultaneously | 15 | 34 | 19 |
| Embodiment 15 | A | F, D | KRG | Two sides | 15 | 33 | 17 |
| Embodiment 16 | A | E, E | KRG | Two sides | 15 | 34 | 18 |
| Comparative example 3 | A | A, A | Mould | Two sides | - | 35 | 53 |
| Embodiment 17 | B | A, A | KRG | Two sides | 15 | 35 | 15 |
| Embodiment 18 | B | F+D | KRG | Simultaneously | 15 | 34 | 16 |
| Embodiment 19 | B | F, D | KRG | Two sides | 15 | 33 | 13 |
| Embodiment 20 | B | E, E | KRG | Two sides | 15 | 34 | 14 |
According to embodiment 1~4 and the result of comparative example 1 and 2, the dividing plate of embodiment 1~4 is on the surface of inorganic particle layer
With groove, compared with not having the dividing plate of slotted comparative example 1 and 2 on the surface of inorganic particle layer, good fluid injection is shown
Property.Particularly the dividing plate of embodiment 1~3 therefore illustrates more because fluid injection direction and groove angulation be -70 °~+70 °
Add good fluid injection.
According to the result of embodiment 3,5,7 and 8, non-woven fabrics base material includes the embodiment 5,7 of fibrillation heat resistant fibre
And 8 dividing plate and the non-woven fabrics base material embodiment 3 that does not include fibrillation heat resistant fibre dividing plate compared with, show good
Fluid injection.Particularly, the political reform freedom of fibrillation heat resistant fibre is the dividing plate of below 300ml embodiment 5 and 7
Fluid injection is more excellent.
According to the result of embodiment 5 and 6, compared to the primary particle that inorganic particulate is 0.7 μm of the particle diameter comprising cohesion
, the dividing plate of the embodiment 5 of the boehmite (aluminium compound) of 2.3 μm of average grain diameter, inorganic particulate is the hydrogen of 0.5 μm of average grain diameter
The dividing plate of the embodiment 6 of magnesia (magnesium compound) shows good fluid injection.In addition, the knot according to embodiment 3 and 10
Fruit, compared to primary particle, 2.3 μm of average grain diameter the boehmite (calorize that inorganic particulate is 0.7 μm of the particle diameter comprising cohesion
Compound) embodiment 3 dividing plate, inorganic particulate for the magnesium hydroxide (magnesium compound) of 2.0 μm of average grain diameter embodiment 10
Dividing plate shows good fluid injection.
According to embodiment 9~11 and the result of comparative example 1 and 2, because the dividing plate of embodiment 9~11 is in inorganic particle layer
Surface there is groove, therefore compared with not having the dividing plate of slotted comparative example 1 and 2 on the surface of inorganic particle layer, show
Good fluid injection.According to the result of embodiment 9~11, the average grain diameter compared to inorganic particulate is less than 0.5 μm of embodiment 9
Dividing plate and the average grain diameter of inorganic particulate be more than 3.0 μm of embodiment 11, the average grain diameter of inorganic particulate is 0.5 μm
Good fluid injection is shown less than the dividing plate of 3.0 μm of embodiment 10.
According to embodiment 12,15 and 16 and the result of comparative example 3, comprising imparting in the inorganic of the two sides of non-woven fabrics base material
The dividing plate of particle layer, in the case where inorganic particle layer has groove, it is also shown for good fluid injection.
According to the result of embodiment 13~15, it is more than 2.0 μm and 4.0 μm to have in inorganic particle layer comprising average grain diameter
The inorganic particle layer A of following inorganic particulate and be 0.5 μm of nothing less than 2.0 μm of inorganic particulate comprising average grain diameter
Among machine particle layer B dividing plate, inorganic particle layer B and inorganic grain are sequentially laminated with compared to the one side in non-woven fabrics base material
The dividing plate of the embodiment 14 of sublayer A composition, the one side having in non-woven fabrics base material are sequentially laminated with inorganic particle layer A and inorganic
The dividing plate of the embodiment 13 of particle layer B composition and there is inorganic particle layer A and in another side in the one side of non-woven fabrics base material
The dividing plate of embodiment 15 with inorganic particle layer B shows good fluid injection.
According to the result of embodiment 12 and embodiment 17, the result of embodiment 13 and embodiment 18, embodiment 15 and implement
The result and the result of embodiment 16 and embodiment 20 of example 19, non-woven fabrics include the embodiment 17 of fibrillation heat resistant fibre
~20 dividing plate does not include each self-corresponding embodiment 12,13,15 and 16 of fibrillation heat resistant fibre with non-woven fabrics base material
Dividing plate compare, show good fluid injection.
The utility model can also be the 1st~15 following lithium ion battery separator.
Above-mentioned 1st lithium ion battery separator is characterised by, in having slotted lithium ion battery separator on surface, the dividing plate
Comprising non-woven fabrics base material and the inorganic particle layer formed in non-woven fabrics base material is assigned, there is groove on the surface of inorganic particle layer.
Above-mentioned 2nd lithium ion battery separator, according to above-mentioned 1st lithium ion battery separator, wherein, to using lithium ion battery
The angle in dividing plate and fluid injection direction and groove when electrolyte is injected in the lithium ion battery that assembles is -70 °~+70 °.
Above-mentioned 3rd lithium ion battery separator, according to above-mentioned 1st or 2 lithium ion battery separator, wherein, inorganic particle layer is only
It is endowed the one side in non-woven fabrics base material.
Above-mentioned 4th lithium ion battery separator, according to above-mentioned 1st or 2 lithium ion battery separator, wherein, inorganic particle layer quilt
Assign on the two sides of non-woven fabrics base material.
Above-mentioned 5th lithium ion battery separator, according to above-mentioned any one of 1~4 lithium ion battery separator, wherein, inorganic grain
Sublayer includes the inorganic particulate that average grain diameter is more than 0.5 μm and less than 4.0 μm.
Above-mentioned 6th lithium ion battery separator, according to above-mentioned any one of 1~4 lithium ion battery separator, wherein, inorganic grain
Sublayer includes 0.5 μm of average grain diameter less than 3.0 μm of inorganic particulate.
Above-mentioned 7th lithium ion battery separator, according to above-mentioned any one of 1~4 lithium ion battery separator, wherein, inorganic grain
Sublayer has the inorganic particle layer A comprising the inorganic particulate that average grain diameter is more than 2.0 μm and less than 4.0 μm and comprising average
Particle diameter is 0.5 μm of inorganic particle layer B less than 2.0 μm of inorganic particulate.
Above-mentioned 8th lithium ion battery separator, according to above-mentioned 7th lithium ion battery separator, wherein, have in non-woven fabrics base material
One side stacked gradually inorganic particle layer A and inorganic particle layer B composition.
Above-mentioned 9th lithium ion battery separator, according to above-mentioned 7th lithium ion battery separator, wherein, have and assign in non-woven fabrics
The inorganic particle layer A and assign the inorganic particle layer B formed on another side that the one side of base material forms.
Above-mentioned 10th lithium ion battery separator, according to above-mentioned any one of 1st~9 lithium ion battery separator, wherein, it is inorganic
Particle layer includes more than one the inorganic particulate selected from the group of aluminium compound and magnesium compound.
Above-mentioned 11st lithium ion battery separator, according to above-mentioned any one of 1st~9 lithium ion battery separator, wherein, it is inorganic
Particle layer includes magnesium compound.
Above-mentioned 12nd lithium ion battery separator, according to above-mentioned 10th or 11 lithium ion battery separator, wherein, magnesium compound is
Magnesium hydroxide.
Above-mentioned 13rd lithium ion battery separator, according to above-mentioned any one of 1st~12 lithium ion battery separator, wherein, nothing
Spin cloth base material and include fibrillation heat resistant fibre.
Above-mentioned 14th lithium ion battery separator, according to above-mentioned 13rd lithium ion battery separator, wherein, fibrillation heat resistance is fine
The political reform freedom of dimension is below 300ml.
Political reform freedom：Except using line footpath 0.14mm, aperture 0.18mm 80 mesh wire nettings as sieve plate, and by sample
Concentration is set to outside 0.1%, it then follows the value that JIS P8121-2 are measured.
Above-mentioned 15th lithium ion battery separator, according to above-mentioned 13rd or 14 lithium ion battery separator, wherein, fibrillation is heat-resisting
Property fiber is fibrillation fully aromatic polyamide fiber.
As application example of the present utility model, lithium ion battery separator and lithium ion polymer battery dividing plate are suitable
's.
Claims (19)
1. a kind of lithium ion battery separator, comprising non-woven fabrics base material and the inorganic particle layer in the non-woven fabrics base material is assigned,
The surface of the inorganic particle layer has groove.
2. lithium ion battery separator according to claim 1, wherein,
The defined injecting electrolytic solution direction of lithium ion battery comprising the lithium ion battery separator and angle formed by the groove
Spend for -70 °~+70 °.
3. lithium ion battery separator according to claim 1, wherein,
The inorganic particle layer is only endowed the one side in the non-woven fabrics base material.
4. lithium ion battery separator according to claim 1, wherein,
The inorganic particle layer is endowed on the two sides of the non-woven fabrics base material.
5. lithium ion battery separator according to claim 2, wherein,
The inorganic particle layer is only endowed the one side in the non-woven fabrics base material.
6. lithium ion battery separator according to claim 2, wherein,
The inorganic particle layer is endowed on the two sides of the non-woven fabrics base material.
7. lithium ion battery separator according to any one of claim 1 to 6, wherein,
The inorganic particle layer includes the inorganic particulate that average grain diameter is more than 0.5 μm and less than 4.0 μm.
8. lithium ion battery separator according to any one of claim 1 to 6, wherein,
It is 0.5 μm less than 3.0 μm of inorganic particulate that the inorganic particle layer, which includes average grain diameter,.
9. lithium ion battery separator according to any one of claim 1 to 6, wherein,
There is the inorganic particle layer inorganic particle layer A and inorganic particle layer B, the inorganic particle layer A to be comprising average grain diameter
More than 2.0 μm and less than 4.0 μm of inorganic particulate, the inorganic particle layer B include average grain diameter be 0.5 μm less than
2.0 μm of inorganic particulate.
10. lithium ion battery separator according to claim 9, wherein,
There is the lithium ion battery separator one side in the non-woven fabrics base material to have stacked gradually the inorganic particle layer A and institute
State inorganic particle layer B composition.
11. lithium ion battery separator according to claim 9, wherein,
The lithium ion battery separator has the inorganic particle layer A and the imparting assigned in the one side of the non-woven fabrics base material
The inorganic particle layer B on the another side of the non-woven fabrics base material.
12. lithium ion battery separator according to any one of claim 1 to 6, wherein,
The inorganic particle layer includes more than one inorganic selected from the group being made up of aluminium compound and magnesium compound
Particle.
13. lithium ion battery separator according to any one of claim 1 to 6, wherein,
The inorganic particle layer includes magnesium compound.
14. lithium ion battery separator according to claim 12, wherein,
The magnesium compound is magnesium hydroxide.
15. lithium ion battery separator according to claim 13, wherein,
The magnesium compound is magnesium hydroxide.
16. lithium ion battery separator according to any one of claim 1 to 6, wherein,
The non-woven fabrics base material includes fibrillation heat resistant fibre.
17. lithium ion battery separator according to claim 16, wherein,
The political reform freedom of the fibrillation heat resistant fibre is below 300ml,
Political reform freedom is except using line footpath 0.14mm, aperture 0.18mm 80 mesh wire nettings as sieve plate and by sample
Concentration is set as outside 0.1%, it then follows the value that JIS P8121-2 are measured.
18. lithium ion battery separator according to claim 16, wherein,
The fibrillation heat resistant fibre is fibrillation fully aromatic polyamide fiber.
19. lithium ion battery separator according to claim 17, wherein,
The fibrillation heat resistant fibre is fibrillation fully aromatic polyamide fiber.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-059867 | 2016-03-24 | ||
| JP2016059867 | 2016-03-24 | ||
| JP2017016829 | 2017-02-01 | ||
| JP2017-016829 | 2017-02-01 |
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| CN201720292192.7U Expired - Fee Related CN207009527U (en) | 2016-03-24 | 2017-03-23 | Lithium ion battery separator |
| CN201710180713.4A Expired - Fee Related CN107230765B (en) | 2016-03-24 | 2017-03-23 | Lithium ion battery separator |
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| JP6994152B2 (en) * | 2017-11-14 | 2022-02-04 | トヨタ自動車株式会社 | Non-aqueous electrolyte secondary battery |
| JPWO2020050377A1 (en) * | 2018-09-06 | 2021-08-30 | 東レ株式会社 | Separator for electrochemical device and electrochemical device using it |
| JP6818241B2 (en) * | 2018-10-02 | 2021-01-20 | トヨタ自動車株式会社 | Winding electrode body for non-aqueous electrolyte secondary battery |
| JP6821071B2 (en) * | 2019-03-26 | 2021-01-27 | 三菱製紙株式会社 | Separator for solid electrolytic capacitors |
| WO2020196215A1 (en) * | 2019-03-26 | 2020-10-01 | 三菱製紙株式会社 | Separator for solid electrolytic capacitor |
| CN112159558B (en) * | 2020-08-25 | 2022-11-25 | 宁国市红宁橡塑制品有限公司 | Preparation method of corrosion-resistant capacitor cover plate material |
| US20220115738A1 (en) * | 2020-10-13 | 2022-04-14 | Electronics And Telecommunications Research Institute | Method of manufacturing secondary battery separator |
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| JP4179778B2 (en) * | 2001-12-27 | 2008-11-12 | 三洋電機株式会社 | Non-aqueous electrolyte battery |
| CN201789019U (en) * | 2010-09-03 | 2011-04-06 | 扬中市阳光电源材料有限公司 | Partition board dedicated to colloid storage battery |
| KR101281037B1 (en) * | 2011-04-06 | 2013-07-09 | 주식회사 엘지화학 | Separator and electrochemical device comprising the same |
| WO2013187458A1 (en) * | 2012-06-12 | 2013-12-19 | 三菱製紙株式会社 | Separator for lithium ion cell |
| JP2014199801A (en) * | 2012-12-28 | 2014-10-23 | 株式会社半導体エネルギー研究所 | Nonaqueous secondary battery and separator |
| CN204391178U (en) * | 2014-12-31 | 2015-06-10 | 北京鼎能开源电池科技股份有限公司 | Barrier film and cylindrical lithium battery |
| CN205016628U (en) * | 2015-08-17 | 2016-02-03 | 广西百翔能源科技有限公司 | High efficiency environmental protection type battery |
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2017
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