WO2023054993A1 - 이차전지용 리드 필름 및 이를 구비하는 이차전지 - Google Patents
이차전지용 리드 필름 및 이를 구비하는 이차전지 Download PDFInfo
- Publication number
- WO2023054993A1 WO2023054993A1 PCT/KR2022/014296 KR2022014296W WO2023054993A1 WO 2023054993 A1 WO2023054993 A1 WO 2023054993A1 KR 2022014296 W KR2022014296 W KR 2022014296W WO 2023054993 A1 WO2023054993 A1 WO 2023054993A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lead
- lead film
- secondary battery
- extinguishing agent
- film
- Prior art date
Links
- 238000007789 sealing Methods 0.000 claims abstract description 69
- 239000003795 chemical substances by application Substances 0.000 claims description 114
- -1 phosphoric acid compound Chemical class 0.000 claims description 21
- 239000006260 foam Substances 0.000 claims description 15
- 102000004169 proteins and genes Human genes 0.000 claims description 8
- 108090000623 proteins and genes Proteins 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 5
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 5
- 239000004202 carbamide Substances 0.000 claims description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Substances OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 5
- 239000004094 surface-active agent Substances 0.000 claims description 5
- RIAHASMJDOMQER-UHFFFAOYSA-N 5-ethyl-2-methyl-1h-imidazole Chemical compound CCC1=CN=C(C)N1 RIAHASMJDOMQER-UHFFFAOYSA-N 0.000 claims description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical group OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 150000003863 ammonium salts Chemical class 0.000 claims description 4
- IYRWEQXVUNLMAY-UHFFFAOYSA-N fluoroketone group Chemical group FC(=O)F IYRWEQXVUNLMAY-UHFFFAOYSA-N 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 4
- 150000002366 halogen compounds Chemical class 0.000 claims description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 3
- 229910052731 fluorine Inorganic materials 0.000 claims description 3
- 239000011737 fluorine Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 9
- 238000013022 venting Methods 0.000 description 9
- 230000002159 abnormal effect Effects 0.000 description 7
- 239000003792 electrolyte Substances 0.000 description 7
- 239000004743 Polypropylene Substances 0.000 description 6
- 238000009835 boiling Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 229920001155 polypropylene Polymers 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- 239000004744 fabric Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000000565 sealant Substances 0.000 description 4
- 206010003497 Asphyxia Diseases 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical group [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229920001774 Perfluoroether Polymers 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229910000028 potassium bicarbonate Inorganic materials 0.000 description 2
- 235000015497 potassium bicarbonate Nutrition 0.000 description 2
- 239000011736 potassium bicarbonate Substances 0.000 description 2
- 229910000027 potassium carbonate Inorganic materials 0.000 description 2
- 235000011181 potassium carbonates Nutrition 0.000 description 2
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 2
- 235000017557 sodium bicarbonate Nutrition 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 2
- LWRNQOBXRHWPGE-UHFFFAOYSA-N 1,1,2,2,3,3,4,4,4a,5,5,6,6,7,7,8,8a-heptadecafluoro-8-(trifluoromethyl)naphthalene Chemical compound FC1(F)C(F)(F)C(F)(F)C(F)(F)C2(F)C(C(F)(F)F)(F)C(F)(F)C(F)(F)C(F)(F)C21F LWRNQOBXRHWPGE-UHFFFAOYSA-N 0.000 description 1
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 1
- CJFUEPJVIFJOOU-UHFFFAOYSA-N 2-perfluorobutyltetrahydrofuran Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)(F)C1CCCO1 CJFUEPJVIFJOOU-UHFFFAOYSA-N 0.000 description 1
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 1
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 description 1
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- MEXUFEQDCXZEON-UHFFFAOYSA-N bromochlorodifluoromethane Chemical compound FC(F)(Cl)Br MEXUFEQDCXZEON-UHFFFAOYSA-N 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920005676 ethylene-propylene block copolymer Polymers 0.000 description 1
- 239000010954 inorganic particle Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000019837 monoammonium phosphate Nutrition 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229950008618 perfluamine Drugs 0.000 description 1
- 229950011087 perflunafene Drugs 0.000 description 1
- UWEYRJFJVCLAGH-IJWZVTFUSA-N perfluorodecalin Chemical compound FC1(F)C(F)(F)C(F)(F)C(F)(F)[C@@]2(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)[C@@]21F UWEYRJFJVCLAGH-IJWZVTFUSA-N 0.000 description 1
- RVZRBWKZFJCCIB-UHFFFAOYSA-N perfluorotributylamine Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)(F)N(C(F)(F)C(F)(F)C(F)(F)C(F)(F)F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F RVZRBWKZFJCCIB-UHFFFAOYSA-N 0.000 description 1
- JAJLKEVKNDUJBG-UHFFFAOYSA-N perfluorotripropylamine Chemical compound FC(F)(F)C(F)(F)C(F)(F)N(C(F)(F)C(F)(F)C(F)(F)F)C(F)(F)C(F)(F)C(F)(F)F JAJLKEVKNDUJBG-UHFFFAOYSA-N 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 229940086066 potassium hydrogencarbonate Drugs 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 235000011008 sodium phosphates Nutrition 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- DQWPFSLDHJDLRL-UHFFFAOYSA-N triethyl phosphate Chemical compound CCOP(=O)(OCC)OCC DQWPFSLDHJDLRL-UHFFFAOYSA-N 0.000 description 1
- WVLBCYQITXONBZ-UHFFFAOYSA-N trimethyl phosphate Chemical compound COP(=O)(OC)OC WVLBCYQITXONBZ-UHFFFAOYSA-N 0.000 description 1
- HQUQLFOMPYWACS-UHFFFAOYSA-N tris(2-chloroethyl) phosphate Chemical compound ClCCOP(=O)(OCCCl)OCCCl HQUQLFOMPYWACS-UHFFFAOYSA-N 0.000 description 1
- XHTMGDWCCPGGET-UHFFFAOYSA-N tris(3,3-dichloropropyl) phosphate Chemical compound ClC(Cl)CCOP(=O)(OCCC(Cl)Cl)OCCC(Cl)Cl XHTMGDWCCPGGET-UHFFFAOYSA-N 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/383—Flame arresting or ignition-preventing means
-
- 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/14—Primary casings; Jackets or wrappings for protecting against damage caused by external factors
- H01M50/143—Fireproof; Explosion-proof
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C35/00—Permanently-installed equipment
- A62C35/02—Permanently-installed equipment with containers for delivering the extinguishing substance
- A62C35/10—Containers destroyed or opened by flames or heat
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
-
- 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag cells
-
- 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/184—Sealing members characterised by their shape or structure
-
- 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/186—Sealing members characterised by the disposition of the sealing members
-
- 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/19—Sealing members characterised by the material
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/534—Electrode connections inside a battery casing characterised by the material of the leads or tabs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
-
- 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
Definitions
- the present invention relates to a lead film for a secondary battery and a secondary battery having the same.
- This application is an application claiming priority to Korean Patent Application No. 10-2021-0131223 filed on October 1, 2021, and all contents disclosed in the specification and drawings of the application are incorporated into this application by reference.
- the secondary battery is an eco-friendly battery technology that can be used repeatedly through charging and discharging and does not use harmful substances such as lead, nickel, and cadmium. It forms the core of the new growth engine industry.
- lithium secondary batteries are most widely used as a power source for mobile IT, which is closely related to human life, and recently, their utilization continues to expand as a power source for electric vehicles and a power storage device for renewable energy.
- a secondary battery consists of a positive electrode, a negative electrode, a separator separating them, an electrolyte that transfers lithium ions through the separator, a case accommodating them, and an electrode lead that allows current to flow out of the case.
- a lead film serves to seal the electrode lead and the case while preventing a short circuit from occurring in the electrode lead by binding to the electrode lead.
- ignition of the battery may occur due to various causes such as a short circuit inside the secondary battery, overcharging or overdischarging, and temperature control. At this time, the temperature inside the secondary battery rises rapidly, and at the same time, a thermal propagation phenomenon in which heat is transferred to an adjacent cell occurs, and a fire may further increase.
- the problem to be solved by the present invention is to provide a lead film for a secondary battery capable of minimizing fire damage when the battery overheats, and a secondary battery having the same.
- the lead film for a secondary battery according to the present invention contains a fire extinguishing agent.
- the lead film for a secondary battery includes an inner space, and includes a fire extinguishing agent in the inner space.
- the inner space may be closed within the lead film.
- a recessed portion formed to enter the lead film in an inner direction is formed, and the recessed portion is provided with a fire extinguishing agent.
- the depression may be open toward the surface of the lead film.
- the depression may have a rectangular shape.
- continuity of the lead film may be maintained in the longitudinal direction, the width direction, and the thickness direction, except for the portion containing the fire extinguishing agent.
- the extinguishing agent may be in solid, liquid or gaseous form.
- the extinguishing agent is carbonate, hydrogen carbonate, protein foam, fluorinated protein foam, alcohol foam, aqueous film foam, synthetic surfactant foam, urea, halogen compound, phosphoric acid compound, phosphazene compound, silicate, ammonium salt, ethyl methyl imidazole, fluorine Roethers, fluoroketones, fluorocarbons, or two or more of these may be included.
- a secondary battery according to the present invention includes an electrode assembly to which an electrode lead is attached; a case accommodating the electrode assembly; a sealing portion formed to seal the electrode assembly in the case; and a lead film covering a part of the outer surface of the electrode lead and interposed between the electrode lead and the sealing portion of the case, wherein the lead film contains a fire extinguishing agent.
- the lead film may include an inner space, and contain a fire extinguishing agent in the inner space.
- the inner space may be closed within the lead film.
- the inner space is spaced apart from the edge of the lead film and the edge of the electrode lead.
- a recessed portion is formed on the lead film to enter the lead film, and the recessed portion may contain an extinguishing agent.
- the recessed part may be formed to enter the electrode lead direction, and the recessed part may be open toward the sealing part.
- the recessed portion may be formed to enter the sealing portion, and the recessed portion may be open toward the electrode lead.
- the depressions are spaced apart from the edge of the lead film and the edge of the electrode lead.
- the depression may have a rectangular shape.
- the lead film includes a first part corresponding to the sealing part and a second part not corresponding to the sealing part, and the fire extinguishing agent is applied to the first part.
- the first part may include a third part corresponding to the electrode lead and a fourth part corresponding to the electrode lead, and the fire extinguishing agent may be included in the third part.
- the secondary battery may be a pouch type secondary battery.
- the lead film for a secondary battery according to the present invention can improve the safety of a battery by including a fire extinguishing agent.
- the fire extinguishing agent is included in the lead film adjacent to the electrode lead having a large calorific value, so that the fire extinguishing agent can be rapidly operated according to the temperature rise of the battery.
- venting occurs at the interface between the surface of the lead film where the recessed portion is open and the sealing portion of the case, and the fire extinguishing agent sealed by the sealing portion is ejected due to the venting.
- the fire extinguishing agent sealed by the sealing portion is ejected due to the venting.
- the fire extinguishing agent can be operated at an electrode lead portion having a very high calorific value, so that it can help to minimize fire damage when the battery is overheated.
- the lead film for a secondary battery according to the present invention can maintain the sealing property of the battery even when the fire extinguishing agent is included.
- the lead film for a secondary battery according to one aspect of the present invention may have sufficient pressure resistance similar to that of a conventional lead film even though the lead film contains a fire extinguishing agent. Accordingly, even if the fire extinguishing agent is included, the sealing property of the battery can be maintained.
- FIG. 1 is a plan view of a lead film for a secondary battery according to an embodiment of the present invention.
- FIG. 2 is a II-II′ cross-sectional view of FIG. 1 .
- FIG 3 is a plan view of a lead film for a secondary battery according to another embodiment of the present invention.
- FIG. 4 is a IV-IV′ cross-sectional view of FIG. 3 .
- FIG. 5 is a diagram showing a secondary battery according to an embodiment of the present invention.
- FIG. 6 is a cross-sectional view taken along the A-A' axis of FIG. 5;
- FIG. 7 is another cross-sectional view taken along the A-A' axis of FIG. 5;
- FIG. 8 is a diagram showing a secondary battery according to another embodiment of the present invention.
- FIG. 9 is a cross-sectional view taken along the BB′ axis of FIG. 8 .
- FIG. 10 is a diagram showing a secondary battery according to another embodiment of the present invention.
- FIG. 11 is a cross-sectional view taken along the axis C-C' of FIG. 10;
- FIG. 12 is an enlarged view of an electrode lead and a lead film portion in a secondary battery according to an embodiment of the present invention.
- a lead film for a secondary battery according to an aspect of the present invention is characterized in that it includes a fire extinguishing agent.
- the extinguishing agent extinguishes or cools the battery when overheating occurs in the battery.
- the battery may be extinguished or cooled while the extinguishing agent is ejected from the lead film.
- any type of fire extinguishing agent commonly used for fire suppression can be used without limitation, and the principle of fire extinguishing can also be applied to suffocation fire extinguishing, cooling fire extinguishing, or fire extinguishing using both of these two principles.
- the fire extinguishing agent may be a variety of substances in solid, liquid, or gaseous form.
- the fire extinguishing agent is carbonate, hydrogen carbonate, protein foam, fluorinated protein foam, alcohol foam, aqueous film foam, synthetic surfactant foam, urea, halogen compound, phosphoric acid compound, phosphazene compound, silicate, ammonium salt, ethyl methyl imidazole, fluoroethers, fluoroketones, fluorocarbons, or two or more of these.
- the carbonate or hydrogen carbonate reacts with acid and generates carbon dioxide gas, which can be digested by suffocation.
- the protein cloth, fluorinated protein cloth, alcohol cloth, aqueous film cloth, synthetic surfactant cloth, etc. can be digested by vaporization heat and oxygen absorption function.
- the urea generates carbon dioxide gas and ammonia by water and heat, and can be extinguished by suffocation and cooling.
- the ammonium salt generates ammonia by heat and can be digested by cooling.
- the halogen compound may be an evaporative liquefaction extinguishing material.
- the fire extinguishing agent is calcium carbonate (CaCO 3 ), potassium carbonate aqueous solution, fluorine-based surfactant, sodium silicate, anhydrous sodium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, sodium phosphate, aluminum sulfate, chloride ammonium, ammonium nitrate, ammonium hydrogen carbonate, ammonium sulfate, ammonium dihydrogen phosphate, sonamum, halon 1211, and the like.
- CaCO 3 calcium carbonate
- potassium carbonate aqueous solution fluorine-based surfactant
- sodium silicate sodium silicate
- anhydrous sodium carbonate sodium hydrogen carbonate
- potassium hydrogen carbonate sodium phosphate
- aluminum sulfate aluminum sulfate
- the fire extinguishing agent is sodium bicarbonate (NaHCO 3 ), known as first-class extinguishing powder, coated with zinc stearate or magnesium, and colored white, known as second-class extinguishing powder.
- sodium bicarbonate (KHCO 3 ) As potassium bicarbonate (KHCO 3 ), it is moisture - proof processed with zinc stearate or magnesium and colored purple . It may contain a material colored in pink, a powder in which urea and potassium carbonate are combined, known as a fourth-class fire extinguishing powder, or two or more of these.
- the fire extinguishing agent may include a high boiling point liquid fire extinguishing agent having a boiling point of 120 ° C to 400 ° C at normal pressure, or a low boiling point liquid fire extinguishing agent having a boiling point of 70 to 120 ° C at normal pressure.
- the phosphoric acid compound may be trimethyl phosphate, triethyl phosphate, tris(chloroethyl) phosphate, tri(dichloropropyl) phosphate, and the like.
- the low-boiling liquid fire extinguishing agent may include fluoroethers, fluoroketones, fluorocarbons, and the like.
- the fluorocarbons may include perfluorobutyl tetrahydrofuran, perfluorotributyl amine, perfluorotripropyl amine, perfluoromethyl decalin, perfluorodecalin, and the like.
- the fire extinguishing agent is included in the lead film adjacent to the electrode lead having a large calorific value, so that the fire extinguishing agent can be rapidly operated according to the temperature rise of the battery.
- the secondary battery including the lead film for secondary batteries according to the present invention even if ignition occurs, it is quickly extinguished by the discharge of the extinguishing agent, so that the temperature inside the secondary battery rises rapidly and at the same time, the thermal runaway phenomenon in which heat is transferred to adjacent cells can be prevented. This can prevent a larger fire from occurring.
- the lead film for a secondary battery serves to seal the electrode lead and the case, mechanical strength must be sufficiently secured.
- the lead film for a secondary battery according to one embodiment of the present invention may have sufficient pressure resistance similar to that of a conventional lead film even though the lead film contains a fire extinguishing agent. Accordingly, even if the fire extinguishing agent is included, the sealing property of the battery can be maintained.
- FIG. 1 is a plan view of a lead film for a secondary battery according to an embodiment of the present invention.
- FIG. 2 is a II-II′ cross-sectional view of FIG. 1 .
- a lead film for a secondary battery (1a) may have an inner space (2), and the inner space (2) includes a fire extinguishing agent (3a). can do.
- the lead film 1a may be a rectangular sheet member having a length L1 longer than the width W1 and thickness H1, and FIG. 2 corresponds to a cross section of the lead film 1a in FIG. 1 cut along the longitudinal direction. do.
- the thickness of the lead film means the maximum value of the distance between both surfaces of the lead film.
- the inner space 2 may have a closed structure within the lead film 1a as shown in FIG. 2 .
- the fire extinguishing agent 3a is buried in the lead film 1a. That is, the continuity of the lead film 1a is maintained except for the portion containing the fire extinguishing agent 3a.
- the lead film 1a - the fire extinguishing agent 3a - the lead film 1a are arranged in the order of the lead film 1a along the longitudinal direction. Also along the thickness direction of the lead film 1a, the lead film 1a - fire extinguishing agent 3a - lead film 1a are arranged in this order.
- the lead film 1a is arrange
- the fire extinguishing agent 3a may not be exposed to the electrolyte, and since an area that can sufficiently contact the electrode lead is secured on the front or rear surface of the lead film 1a, it is easy to secure the confidentiality and durability of the battery. .
- the fire extinguishing agent 3a may be ejected from the lead film 1a when the lead film 1a melts due to abnormal operation of the battery or the like.
- the inner space 2 has a length L2 shorter than the length L1 of the lead film 1a as shown in FIGS. 1 and 2 and the thickness H1 of the lead film 1a. ), and has a width (W2) smaller than the width (W1) of the lead film (1a) to have a rectangular shape in plane and cross section, but a shape that can contain the fire extinguishing agent (3a) If so, it is not limited thereto.
- the thickness H1 of the lead film 1a for a secondary battery may be 0.2 mm, and the inner space 2 may have a thickness H2 of 0.15 mm.
- the inner space 2 may be disposed at a distance of 2 mm (P) from an edge of the lead film 1a for a secondary battery along the longitudinal direction.
- the thickness H1 can be made constant. Since there is no change in the thickness of the lead film 1a, the existing sealing process can be used as it is, and process change due to the improved lead film 1a may not be required in the secondary battery manufacturing process, which is effective in terms of process management.
- FIG. 3 is a plan view of a lead film for a secondary battery according to another embodiment of the present invention. 4 is a IV-IV′ cross-sectional view of FIG. 3 .
- the lead film 1b for a secondary battery may have a recessed portion 4 formed to enter the lead film 1b in an inner direction,
- the recessed portion 4 may contain an extinguishing agent 3b.
- the lead film 1b may be a rectangular sheet member having a length L1 longer than the width W1 and thickness H1.
- FIG. 3 corresponds to a cross section cut along the longitudinal direction of the lead film 1b.
- the recessed portion 4 may be open toward the surface of the lead film 1b as shown in FIGS. 3 and 4 .
- the continuity of the lead film 1b is maintained except for the portion containing the fire extinguishing agent 3a.
- the lead film 1b - fire extinguishing agent 3b - lead film 1b are arranged in this order.
- the lead film 1b - the fire extinguishing agent 3b are arranged in the order of the thickness direction of the lead film 1b.
- the lead film 1b - fire extinguishing agent 3b - lead film 1b are arranged in this order.
- the recessed portion 4 has a length L2 shorter than the length L1 of the lead film 1b, and the length of the lead film 1b It has a thickness (H2) smaller than the thickness (H1) and has a width (W2) smaller than the width (W1) of the lead film (1b) to have a rectangular shape in plane and cross section, but may contain a fire extinguishing agent (3b) It is not limited to this as long as it is possible.
- the thickness H1 of the lead film 1b for a secondary battery may be 0.2 mm
- the depression 4 may have a thickness H2 of 0.15 mm.
- the depressions 4 may be disposed at a distance of 2 mm (P) from an edge of the lead film 1b for a secondary battery along the longitudinal direction.
- P 2 mm
- the secondary battery lead films (1a, 1b) may include polyethylene, polypropylene, polyimide, or two or more of them, and other materials widely used as lead films for secondary batteries.
- the lead films 1a and 1b made of these materials have excellent sealing properties, so they are good for maintaining the airtightness of the battery and can also prevent leakage of the internal electrolyte solution.
- a secondary battery may be manufactured by interposing the lead film for a secondary battery according to an embodiment of the present invention between an electrode lead and a case.
- a secondary battery according to an embodiment of the present invention includes an electrode assembly to which an electrode lead is attached;
- a case accommodating the electrode assembly; a sealing portion formed to seal the electrode assembly in the case; and a lead film covering a part of the outer surface of the electrode lead and interposed between the electrode lead and the sealing portion of the case, wherein the lead film contains a fire extinguishing agent.
- 5 shows a secondary battery according to an embodiment of the present invention.
- 6 is a cross-sectional view taken along the A-A' axis of FIG. 5;
- a secondary battery 10 includes an electrode assembly 12 to which an electrode lead 11 is attached, and a case 13 .
- the electrode lead 11 is a type of terminal exposed to the outside and connected to an external device, and a conductive material may be used.
- the electrode lead 11 may include a positive electrode lead and a negative electrode lead.
- the positive electrode lead and the negative electrode lead may be disposed in opposite directions with respect to the length direction (X direction) of the battery, or the positive electrode lead and negative electrode lead may be disposed in the same direction with respect to the length direction of the battery. .
- the electrode assembly 12 includes a positive electrode plate, a negative electrode plate, and a separator.
- a positive electrode plate and a negative electrode plate may be sequentially stacked with a separator interposed therebetween.
- the positive electrode plate may include a positive electrode current collector made of a thin metal plate having excellent conductivity, for example, aluminum (Al) foil, and a positive electrode active material layer coated on at least one surface thereof.
- the positive electrode plate may include an anode made of a metal material, for example, an aluminum (Al) material, at one end.
- the positive electrode may extend and protrude from one end of the positive electrode plate, or may be welded to one end of the positive electrode plate or bonded using a conductive adhesive.
- the negative electrode plate may include a negative electrode current collector made of a conductive metal thin plate, for example, copper (Cu) foil, and a negative electrode active material layer coated on at least one surface thereof.
- the negative electrode plate may include a negative electrode formed of a metal material, for example, a nickel (Ni) material, at one end. The negative electrode may extend and protrude from one end of the negative electrode plate, or may be welded to one end of the positive electrode plate or bonded using a conductive adhesive.
- the separator may be positioned between the positive electrode plate and the negative electrode plate to electrically insulate the positive electrode plate and the negative electrode plate from each other, and may be formed in a porous film form so that lithium ions or the like may pass between the positive electrode plate and the negative electrode plate.
- a separator may include, for example, a porous membrane using polyethylene (PE), polypropylene (PP), or a composite film thereof.
- An inorganic coating layer may be provided on the surface of the separator.
- the inorganic coating layer may have a structure in which inorganic particles are bonded to each other by a binder to form an interstitial volume between the particles.
- the electrode assembly 12 includes a jelly-roll (wound type) electrode assembly having a structure in which long sheet-shaped positive electrodes and negative electrodes are wound with a separator interposed therebetween, and a plurality of positive electrodes and negative electrodes cut in units of a predetermined size through a separator. Stacked (stacked) electrode assemblies sequentially stacked in one state, bi-cells in which positive and negative electrodes in predetermined units are stacked with a separator interposed therebetween, or a stack structure in which full cells are wound /folding type electrode assemblies; and the like.
- the case 13 serves to accommodate the electrode assembly 12 .
- the case 13 may include an accommodating part 13a accommodating the electrode assembly 12 and a sealing part 13b formed to seal the electrode assembly 12 .
- the sealing portion 13b may be fused along the outer circumferential surface of the accommodating portion 13a to seal the electrode assembly 12 .
- the fusion may be thermal fusion or ultrasonic fusion, but is not particularly limited as long as the sealing portion 13b can be fused.
- the case 13 may be provided in the form of a film having a multi-layer structure of an outer layer for external impact protection, a metal barrier layer for blocking moisture, and a sealant layer for sealing the case.
- the outer layer is other polyester-based films such as poly(ethylene terephthalate) (PET), polybutylene terephthalate, polyethylene naphthalate, polybutylene naphthalate, co-polyester, polycarbonate, nylon, etc. It may include, and may be composed of a single layer or multiple layers.
- PET poly(ethylene terephthalate)
- PET polybutylene terephthalate
- polyethylene naphthalate polybutylene naphthalate
- co-polyester polycarbonate
- nylon nylon
- the metal barrier layer may include aluminum, copper, or the like.
- the sealant layer may include a sealant resin and may be composed of a single layer or multiple layers.
- the sealant resin may include polypropylene (PP), acid modified polypropylene (PPa), random polypropylene, ethylene propylene copolymer, or two or more of these.
- the ethylene propylene copolymer may include ethylene-propylene rubber, ethylene-propylene block copolymer, etc., but is not limited thereto.
- the case 13 may be in the form of a pouch.
- the case 13 when the case 13 is in the form of a pouch, it may include an upper pouch and a lower pouch.
- the battery may be sealed as the upper pouch and the lower pouch are fused together on the outer circumferential surface.
- the sealing part 13b may be sealed on four sides or three sides at the edge of the case 13 .
- the boundary surface of the upper pouch and the lower pouch is bent so that the electrode assembly accommodating parts 13a formed in the upper pouch and the lower pouch are overlapped. It means a structure in which the edges of the remaining three sides are sealed except for the bent part in 5 may be referred to as a view showing the receiving part 13a of the lower pouch before covering the upper pouch.
- the electrode lead 11 may be housed in the case 13 such that a portion thereof is exposed to the outside of the case 13 .
- the electrode lead 11 is electrically connected to an electrode tab (not shown) included in the electrode assembly 12 and protrudes outward from the case 13 via the sealing portion 13b.
- the lead film 14a blocks electrical contact between the case 13 and the electrode lead 11 and serves as an insulation.
- a secondary battery 10 according to an embodiment of the present invention includes a lead film 14a.
- the lead film 14a contains an extinguishing agent therein.
- the lead film 14a covers a part of the outer surface of the electrode lead 11 and is interposed between the electrode lead 11 and the case 13 .
- the lead film 14a may be interposed between the electrode lead 11 and the sealing portion 13b of the case 13 where the electrode lead 11 protrudes. Accordingly, the lead film 14a can improve sealing performance between the sealing portion 13b and the electrode lead 11 while preventing a short circuit from occurring in the electrode lead 11 during sealing.
- FIG. 7 is another cross-sectional view taken along the A-A' axis of FIG. 5; Although FIG. 7 shows that the lead film 14a is provided on both sides of the electrode lead 11, the lead film 14a may be located on at least one side of the electrode lead 11.
- a lead film 14a according to the present invention may be provided on one surface of the electrode lead 11, and another lead film 14a' may be provided on the other surface of the electrode lead 11. there is.
- the lead film 14a may be positioned above the electrode lead 11, and another lead film 14a' or lead film 14a may be positioned below the electrode lead 11.
- the electrode lead 11 is sealed with the sealing portion 13b in a state located between the lead film 14a and another lead film 14a' or between two lead films 14a, and the electrode lead 11 (11) Surrounding lead films may be connected to each other. Accordingly, the lead films 14a and 14a' may prevent side surfaces of the electrode lead 11 from being exposed to the outside, and improve sealing properties between the sealing portion 13b and the electrode lead 11 .
- the length (L1) of the lead film (14a) may be greater than the width (LW) of the electrode lead (11).
- the length of the lead film means the maximum value of the distance between one end and the other end of the lead film in a direction (Y-axis direction) perpendicular to the protrusion direction (X-axis direction) of the electrode lead 11 . In other words, it refers to the width of the lead film in the width direction (Y-axis direction) of the electrode lead 11.
- the width W1 of the lead film 14a may be larger than the width SW of the sealing portion 13b but smaller than the length LL of the electrode lead 11 .
- the width of the lead film 14a means the maximum value of the distance between one end and the other end of the lead film 14a in the protrusion direction of the electrode lead 11 . In other words, it refers to the width of the lead film in a direction orthogonal to the width direction of the electrode lead 11 .
- the width of the sealing portion 13b means the maximum value of the distance between one end and the other end of the sealing portion 13b in the protruding direction of the electrode lead 11 .
- the length of the electrode lead 11 means the maximum value of the distance between one end and the other end of the electrode lead 11 in the projecting direction of the electrode lead 11 .
- the lead film (14a) may protrude to the outside of the case 13, and may protrude outward from the case (13). Sealability can be improved by further protecting the protruding electrode lead 11 portion.
- the width W1 of the lead film 14a should be smaller than the length LL of the electrode lead 11 so that the portion of the electrode lead 11 not covered with the lead film 14a can be used for electrical connection.
- the entire width of the lead film 14 may be smaller than the width of the sealing portion 13b and smaller than the length of the electrode lead 11 .
- the lead film 14a may not protrude outside the case 13 .
- the entire area of the lead film 14a may correspond to the sealing portion 13b.
- only a partial area of the lead film 14a may correspond to the sealing portion 13b.
- the lead film 14a may have an inner space 15 , and a fire extinguishing agent 16 may be contained in the inner space 15 .
- the lead film 14a provided with the inner space 15 is shown as being located on one side of the electrode lead 11, but the lead film 14a provided with the inner space 15 is shown in FIG. As shown, it may be located on both sides of the electrode lead 11.
- the inner space 15 may have a closed structure within the lead film 14a. This structure has been described with reference to FIGS. 1 and 2 .
- the fire extinguishing agent 16 may not be exposed to the electrolyte, and it may be easy to secure airtightness and durability of the battery.
- the location of the inner space 15 can be freely selected.
- the fire extinguishing agent 16 may be ejected from the lead film 14 when the lead film 14a melts due to abnormal operation of the battery or the like.
- the inner space 15 may have a rectangular shape as shown in FIGS. 6 and 7, but is not limited thereto as long as it can contain the fire extinguishing agent 16.
- the thickness H1 of the lead film 14a may be 0.2 mm, and the inner space 15 may have a thickness H2 of 0.15 mm.
- the inner space 15 may be disposed at a distance P from an edge of the lead film 14a in the longitudinal direction.
- the spacing P may be 2 mm.
- the inner space 15 when the inner space 15 is located on the electrode lead 11, the inner space 15 may be disposed at a distance P' from an edge of the electrode lead 11 in the longitudinal direction.
- the spacing P' may be 2 mm.
- the durability and airtightness of the lead film 14a may be controlled by adjusting the position of the inner space 15 . Since the lead film for a secondary battery serves to seal the electrode lead and the case, mechanical strength must be sufficiently secured. Even if the lead film 14a contains the fire extinguishing agent 16 in the lead film 14a, it has sufficient pressure resistance like the conventional lead film through a method such as adjusting the position of the inner space 15 as described above. can Accordingly, even if the fire extinguishing agent is included, the sealing property of the battery can be maintained.
- FIG. 8 shows a secondary battery according to another embodiment of the present invention.
- a secondary battery 10 includes an electrode assembly 12 to which an electrode lead 11 is attached, a case 13, and a lead film 14b.
- the electrode lead 11 the electrode assembly 12, and the case 13, the above description is referred to.
- the lead film 14b covers a part of the outer surface of the electrode lead 11 and is interposed between the electrode lead 11 and the case 13 .
- the lead film 14b may be interposed between the electrode lead 11 and the sealing portion 13b of the case 13 where the electrode lead 11 protrudes.
- FIG. 9 is a cross-sectional view taken along the BB′ axis of FIG. 8 .
- the lead film 14b may have a recessed portion 17a formed to enter the lead film 14b in an inner direction, and the recessed portion 17a may contain a fire extinguishing agent 16 can be provided.
- the depression 17a is formed to enter in a direction toward the electrode lead 11 located below (-Z axis direction) from the position of the lead film 14b located above the electrode lead 11. it could be
- the recessed portion 17a may be open in a direction (Z-axis direction) from the lead film 14b toward the sealing portion 13b. That is, it may be opened toward the surface of the lead film 14b.
- the adhesive force of the interface between the lead film surrounding the electrode lead and the case is weak. Accordingly, when abnormal operation of the battery occurs, venting occurs at the interface between the lead film and the case.
- the lead film 14b having the depression 17a is positioned on one surface of the electrode lead 11, and another lead film 14b' is provided on the other surface of the electrode lead 11.
- the lead film 14b in which the depression 17a is formed may be positioned on both sides of the electrode lead 11 .
- a secondary battery 10 shows a secondary battery according to another embodiment of the present invention.
- a secondary battery 10 according to another embodiment of the present invention includes an electrode assembly 12 to which an electrode lead 11 is attached, a case 13, and a lead film 14c.
- the electrode lead 11, the electrode assembly 12, and the case 13, the above description is referred to.
- the lead film 14c covers a part of the outer surface of the electrode lead 11 and is interposed between the electrode lead 11 and the case 13 .
- the lead film 14c may be interposed between the electrode lead 11 and the sealing portion 13b of the case 13 where the electrode lead 11 protrudes.
- FIG. 11 is a cross-sectional view taken along the axis C-C' of FIG. 10;
- the lead film 14c may have a recessed portion 17b formed to enter the lead film 14c in an inside direction (Z-axis direction), and the recessed portion 17b is A medicine (16) may be provided.
- the recessed portion 17b may be formed to enter in a direction from the lead film 14c toward the sealing portion 13b.
- the recessed portion 17b may be open in a direction (-Z axis direction) toward the electrode lead 11 in the lead film 14c.
- the recessed portion 17b When the recessed portion 17b is formed to open toward the electrode lead 11, venting occurs at the interface between the electrode lead 11 and the lead film 14c, which is sealed by the electrode lead 11.
- the fire extinguishing agent 16 is ejected due to the venting of the interface between the electrode lead 11 and the lead film 14c, so that the fire extinguishing agent can be quickly operated.
- the recessed portion 17b faces the electrode lead 11, the fire extinguishing agent can be operated with the electrode lead portion having a very high calorific value, thereby helping to minimize fire damage when the battery is overheated.
- the lead film 14c on which the depression 17b is formed is located on one side of the electrode lead 11, and another lead film 14c' is provided on the other side of the electrode lead 11.
- the lead film 14c in which the depression 17b is formed may be positioned on both sides of the electrode lead 11.
- the depressions 17a and 17b may have a rectangular shape, as shown in FIGS. 8 to 11, but are not limited thereto as long as they can contain the fire extinguishing agent 16. does not
- the thickness H1 of the lead films 14b and 14c may be 0.2 mm, and the depressions 17a and 17b may have a thickness H2 of 0.15 mm.
- the depressions 17a and 17b may be disposed at intervals of 2 mm (P) from edges of the lead films 14b and 14c along the longitudinal direction.
- the depressions 17a and 17b are spaced at a distance of 2 mm (P') from the edge of the electrode lead 11 along the length direction. can be placed and placed.
- the durability and airtightness of the lead films 14b and 14c may be controlled by adjusting the positions of the depressions 17a and 17b. Since the lead film for a secondary battery serves to seal the electrode lead and the case, mechanical strength must be sufficiently secured. Even if the lead films 14b and 14c contain the fire extinguishing agent 16 in the lead films 14b and 14c, by adjusting the position of the depressions 17a and 17b, they can have sufficient pressure resistance like conventional lead films. . Accordingly, even if the fire extinguishing agent is included, the sealing property of the battery can be maintained.
- the thickness H1 of the lead films 14a, 14b, and 14c is constant along the longitudinal direction. Where the inner space 15 or the depressions 17a and 17b are located, the lead films 14a, 14b and 14c are partially removed in the thickness direction. Even so, it is necessary to ensure that it has sufficient mechanical rigidity.
- the internal pressure simulation was conducted with the above conditions of thickness (H1, H2) and spacing (P, P').
- the amount of deformation of the entire structure was analyzed assuming that gas was generated inside the pouch-type case and an internal pressure of 0.1 MPa acted from the inside of the case toward the electrode lead. At this time, the bottom of the case was fixed.
- the maximum displacement from the inner end in the width direction of the sealing unit to the electrode lead direction was simulated as 0.05063 mm, and in the case of the present invention, the maximum displacement was simulated as 0.05766 mm.
- the maximum displacement will increase when the fire extinguishing agent is included, but the difference in deformation amount is very insignificant even at 0.1 MPa pressure, so it can be seen that it is negligible. Therefore, in the case of the present invention, it was confirmed that it had sufficient pressure resistance like the conventional lead film.
- FIG. 12 is an enlarged view of an electrode lead and a lead film portion in a secondary battery according to an embodiment of the present invention.
- the lead film 14 may include a first portion 100 corresponding to the sealing portion 13b and a second portion 200 that does not correspond to the sealing portion 13b. .
- a fire extinguishing agent may be included in the first part 100 .
- the extinguishing agent is not exposed to the electrolyte during normal operation of the battery, but the interface between the sealing part 13b and the lead film 14 is formed during abnormal operation of the battery.
- the extinguishing agent may be ejected from the lead film 14 .
- the lead film 14 includes the recessed portion 17, the recessed portion 17 may be formed in the first portion 100 so that the fire extinguishing agent is not exposed to the electrolyte during normal operation of the battery. .
- a fire extinguishing agent may be included in the second portion 200.
- the fire extinguishing agent is included in the second part 200, the fire extinguishing agent is not exposed to the electrolyte during normal operation of the battery, but when the battery operates abnormally, the lead film 14 melts and the fire extinguishing agent enters the lead film 14. can be ejected from In particular, when the lead film 14 has an internal space, the fire extinguishing agent may be contained in the second part 200 because the fire extinguishing agent is not exposed to the electrolyte even if it is not sealed by the sealing part 13b.
- the lead film 14 may include a first portion 100 corresponding to the sealing portion 13b and a second portion 200 that does not correspond to the sealing portion 13b.
- the first part 100 may include a third part 300 corresponding to the electrode lead 11 and a fourth part 400 not corresponding to the electrode lead 11. .
- the lead film 14 may have a first portion 100 corresponding to the sealing portion 13b and a second portion 200 that does not correspond to the sealing portion 13b.
- the second part 200 may include a fifth part 500 corresponding to the electrode lead 11 and a sixth part 600 not corresponding to the electrode lead 11.
- a fire extinguishing agent may be included in the third part (300).
- the fire extinguishing agent is located in the portion of the electrode lead 11 having a large calorific value, and it may be advantageous for the fire extinguishing agent to operate quickly according to the temperature rise of the battery.
- a fire extinguishing agent may be included in the fourth part 400.
- the fire extinguishing agent may be included in the fourth portion 400, it may be advantageous for the fire extinguishing agent to act quickly when separation occurs between the lead film 14 and the sealing portion 13b.
- a fire extinguishing agent may be included in either the fifth part (500) or the sixth part (600).
- the secondary battery may be a cylindrical, prismatic, or pouch-shaped secondary battery.
- the secondary battery may be a pouch type secondary battery.
- Pouch-type secondary batteries are easy to increase the volume ratio, but have a disadvantage that the pouch itself is difficult to hold the cell.
- pouch-type secondary batteries do not have thermal stability when the temperature of the cell runs out. According to the present invention, there is an advantage in that a safety device is provided even in a pouch-type secondary battery by improving the lead film.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
Abstract
Description
Claims (20)
- 소화 약제를 포함하고 있는 것을 특징으로 하는 이차전지용 리드 필름.
- 제1항에 있어서,상기 이차전지용 리드 필름이 내부 공간을 포함하고,상기 내부 공간에 소화 약제를 포함하고 있는 것을 특징으로 하는 이차전지용 리드 필름.
- 제2항에 있어서,상기 내부 공간이 상기 리드 필름 내에 폐쇄되어 있는 것을 특징으로 하는 이차전지용 리드 필름.
- 제1항에 있어서,상기 리드 필름 내부 방향으로 들어가도록 형성된 함몰부가 형성되어 있고,상기 함몰부는 소화 약제를 구비하고 있는 것을 특징으로 하는 이차전지용 리드 필름.
- 제4항에 있어서,상기 함몰부가 상기 리드 필름의 표면을 향해 개방되어 있는 것을 특징으로 하는 이차전지용 리드 필름.
- 제1항에 있어서,상기 소화 약제가 포함된 부분을 제외하고는 상기 리드 필름의 연속성이 길이 방향, 폭 방향 및 두께 방향으로 유지되는 것을 특징으로 하는 이차전지용 리드 필름.
- 제1항에 있어서,상기 소화 약제가 고체, 액체, 또는 기체 형태인 것을 특징으로 하는 이차전지용 리드 필름.
- 제1항에 있어서,상기 소화 약제가 탄산염, 탄산수소염, 단백포, 불화단백포, 알코올포, 수성막포, 합성계면활성제포, 요소, 할로겐 화합물, 인산 화합물, 포스파젠 화합물, 규산염, 암모늄염, 에틸 메틸 이미다졸, 플루오로에테르류, 플루오로케톤류, 플루오로카본류, 또는 이들 중 2 이상을 포함하는 것을 특징으로 하는 이차전지용 리드 필름.
- 전극 리드가 부착된 전극 조립체;상기 전극 조립체를 수납하는 케이스;상기 케이스에 전극 조립체를 밀봉하기 위해 형성된 실링부; 및상기 전극 리드의 외면의 일부를 감싸고, 상기 전극 리드와 상기 케이스의 실링부 사이에 개재된 리드 필름;을 구비하고,상기 리드 필름이 소화 약제를 포함하고 있는 것을 특징으로 하는 이차전지.
- 제9항에 있어서,상기 리드 필름이 내부 공간을 포함하고,상기 내부 공간에 소화 약제를 포함하고 있는 것을 특징으로 하는 이차전지.
- 제10항에 있어서,상기 내부 공간이 상기 리드 필름 내에 폐쇄되어 있는 것을 특징으로 하는 이차전지.
- 제10항에 있어서,상기 내부 공간은 상기 리드 필름의 가장자리와 상기 전극 리드의 가장자리로부터 간격을 두고 배치되는 것을 특징으로 하는 이차전지.
- 제9항에 있어서,상기 리드 필름 상에 상기 리드 필름 내부 방향으로 들어가도록 형성된 함몰부가 형성되어 있고,상기 함몰부는 소화 약제를 구비하고 있는 것을 특징으로 하는 이차전지.
- 제13항에 있어서,상기 함몰부가 상기 전극 리드 방향으로 들어가도록 형성된 것을 특징으로 하는 이차전지.
- 제14항에 있어서,상기 함몰부가 상기 실링부 방향을 향해 개방되어 있는 것을 특징으로 하는 이차전지.
- 제13항에 있어서,상기 함몰부가 상기 실링부 방향으로 들어가도록 형성된 것을 특징으로 하는 이차전지.
- 제16항에 있어서,상기 함몰부가 상기 전극 리드 방향을 향해 개방되어 있는 것을 특징으로 하는 이차전지.
- 제13항에 있어서,상기 함몰부는 상기 리드 필름의 가장자리와 상기 전극 리드의 가장자리로부터 간격을 두고 배치되는 것을 특징으로 하는 이차전지.
- 제9항에 있어서,상기 리드 필름이 상기 실링부에 대응하는 제1부와 상기 실링부에 대응하지 않는 부위인 제2부를 구비하고,상기 소화 약제가 상기 제1부에 포함되는 것을 특징으로 하는 이차전지.
- 제19항에 있어서,상기 제1부가 상기 전극 리드에 대응하는 부위인 제3부와 상기 전극 리드에 대응하지 않는 부위인 제4부를 구비하고,상기 소화 약제가 상기 제3부에 포함되는 것을 특징으로 하는 이차전지.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA3204223A CA3204223A1 (en) | 2021-10-01 | 2022-09-23 | Lead film for secondary battery and secondary battery including the lead film |
CN202280007493.4A CN116547858A (zh) | 2021-10-01 | 2022-09-23 | 用于二次电池的引线膜和包括该引线膜的二次电池 |
EP22876765.3A EP4235920A1 (en) | 2021-10-01 | 2022-09-23 | Lead film for secondary battery, and secondary battery comprising same |
JP2023534410A JP2023553059A (ja) | 2021-10-01 | 2022-09-23 | 二次電池用リードフィルム及びこれを備える二次電池 |
US18/036,740 US20230411785A1 (en) | 2021-10-01 | 2022-09-23 | Lead Film for Secondary Battery and Secondary Battery Including the Lead Film |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2021-0131223 | 2021-10-01 | ||
KR20210131223 | 2021-10-01 |
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WO2023054993A1 true WO2023054993A1 (ko) | 2023-04-06 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/KR2022/014296 WO2023054993A1 (ko) | 2021-10-01 | 2022-09-23 | 이차전지용 리드 필름 및 이를 구비하는 이차전지 |
Country Status (7)
Country | Link |
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US (1) | US20230411785A1 (ko) |
EP (1) | EP4235920A1 (ko) |
JP (1) | JP2023553059A (ko) |
KR (1) | KR20230047897A (ko) |
CN (1) | CN116547858A (ko) |
CA (1) | CA3204223A1 (ko) |
WO (1) | WO2023054993A1 (ko) |
Citations (6)
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JP2012104503A (ja) * | 2012-01-24 | 2012-05-31 | Sumitomo Electric Ind Ltd | 電気部品、非水電解質電池、並びに、それらに用いられる絶縁被覆層つきリード導体及び封入容器 |
KR20170019020A (ko) * | 2015-08-10 | 2017-02-21 | 에스케이이노베이션 주식회사 | 이차전지 및 이를 포함하는 배터리 모듈 |
KR20170027150A (ko) * | 2015-09-01 | 2017-03-09 | 주식회사 엘지화학 | 전지셀 및 그의 제조방법 |
KR20180119319A (ko) * | 2017-04-25 | 2018-11-02 | 주식회사 엘지화학 | 안전성이 향상된 배터리 셀 |
US20200373582A1 (en) * | 2017-08-31 | 2020-11-26 | Panasonic Intellectual Property Management Co., Ltd. | Nonaqueous electrolyte secondary battery |
KR20210131223A (ko) | 2020-04-23 | 2021-11-02 | 삼성전자주식회사 | 표시 장치 |
-
2022
- 2022-09-23 WO PCT/KR2022/014296 patent/WO2023054993A1/ko active Application Filing
- 2022-09-23 KR KR1020220121080A patent/KR20230047897A/ko not_active Application Discontinuation
- 2022-09-23 CN CN202280007493.4A patent/CN116547858A/zh active Pending
- 2022-09-23 US US18/036,740 patent/US20230411785A1/en active Pending
- 2022-09-23 CA CA3204223A patent/CA3204223A1/en active Pending
- 2022-09-23 JP JP2023534410A patent/JP2023553059A/ja active Pending
- 2022-09-23 EP EP22876765.3A patent/EP4235920A1/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012104503A (ja) * | 2012-01-24 | 2012-05-31 | Sumitomo Electric Ind Ltd | 電気部品、非水電解質電池、並びに、それらに用いられる絶縁被覆層つきリード導体及び封入容器 |
KR20170019020A (ko) * | 2015-08-10 | 2017-02-21 | 에스케이이노베이션 주식회사 | 이차전지 및 이를 포함하는 배터리 모듈 |
KR20170027150A (ko) * | 2015-09-01 | 2017-03-09 | 주식회사 엘지화학 | 전지셀 및 그의 제조방법 |
KR20180119319A (ko) * | 2017-04-25 | 2018-11-02 | 주식회사 엘지화학 | 안전성이 향상된 배터리 셀 |
US20200373582A1 (en) * | 2017-08-31 | 2020-11-26 | Panasonic Intellectual Property Management Co., Ltd. | Nonaqueous electrolyte secondary battery |
KR20210131223A (ko) | 2020-04-23 | 2021-11-02 | 삼성전자주식회사 | 표시 장치 |
Also Published As
Publication number | Publication date |
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US20230411785A1 (en) | 2023-12-21 |
EP4235920A1 (en) | 2023-08-30 |
CN116547858A (zh) | 2023-08-04 |
CA3204223A1 (en) | 2023-04-06 |
KR20230047897A (ko) | 2023-04-10 |
JP2023553059A (ja) | 2023-12-20 |
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