WO2015115557A1 - 電池及び封口体ユニット - Google Patents
電池及び封口体ユニット Download PDFInfo
- Publication number
- WO2015115557A1 WO2015115557A1 PCT/JP2015/052552 JP2015052552W WO2015115557A1 WO 2015115557 A1 WO2015115557 A1 WO 2015115557A1 JP 2015052552 W JP2015052552 W JP 2015052552W WO 2015115557 A1 WO2015115557 A1 WO 2015115557A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- terminal
- gasket
- sealing body
- reduced diameter
- battery
- Prior art date
Links
- 238000007789 sealing Methods 0.000 title claims description 342
- 230000000630 rising effect Effects 0.000 claims description 183
- 230000000452 restraining effect Effects 0.000 claims description 75
- 229920005989 resin Polymers 0.000 claims description 33
- 239000011347 resin Substances 0.000 claims description 33
- 229910052751 metal Inorganic materials 0.000 claims description 25
- 239000002184 metal Substances 0.000 claims description 25
- 230000002093 peripheral effect Effects 0.000 claims description 24
- 239000000956 alloy Substances 0.000 claims description 22
- 229910045601 alloy Inorganic materials 0.000 claims description 21
- 230000007423 decrease Effects 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 238000013459 approach Methods 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 4
- 238000004806 packaging method and process Methods 0.000 abstract 2
- 239000011255 nonaqueous electrolyte Substances 0.000 description 41
- 239000000463 material Substances 0.000 description 38
- 239000007773 negative electrode material Substances 0.000 description 26
- -1 polytetrafluoroethylene Polymers 0.000 description 19
- 239000007774 positive electrode material Substances 0.000 description 18
- 239000006258 conductive agent Substances 0.000 description 17
- 239000011230 binding agent Substances 0.000 description 16
- 238000000034 method Methods 0.000 description 16
- 239000007788 liquid Substances 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 12
- 229910000838 Al alloy Inorganic materials 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 11
- 238000012360 testing method Methods 0.000 description 11
- 239000004743 Polypropylene Substances 0.000 description 10
- 229920001155 polypropylene Polymers 0.000 description 10
- 229910052782 aluminium Inorganic materials 0.000 description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 9
- 239000002033 PVDF binder Substances 0.000 description 8
- 239000004698 Polyethylene Substances 0.000 description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 8
- 229920000573 polyethylene Polymers 0.000 description 8
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 8
- 150000003839 salts Chemical class 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 239000010935 stainless steel Substances 0.000 description 7
- 229910001220 stainless steel Inorganic materials 0.000 description 7
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 6
- 239000002131 composite material Substances 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 6
- 239000003792 electrolyte Substances 0.000 description 6
- 239000011572 manganese Substances 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 239000003960 organic solvent Substances 0.000 description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical group [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 5
- 239000004696 Poly ether ether ketone Substances 0.000 description 5
- 239000004734 Polyphenylene sulfide Substances 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 239000008151 electrolyte solution Substances 0.000 description 5
- 239000011888 foil Substances 0.000 description 5
- 229910001416 lithium ion Inorganic materials 0.000 description 5
- 229920002530 polyetherether ketone Polymers 0.000 description 5
- 229920000069 polyphenylene sulfide Polymers 0.000 description 5
- DHKHKXVYLBGOIT-UHFFFAOYSA-N 1,1-Diethoxyethane Chemical compound CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- 239000011149 active material Substances 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- 230000001747 exhibiting effect Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 229910052749 magnesium Inorganic materials 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- 239000011701 zinc Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229920001707 polybutylene terephthalate Polymers 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 239000005060 rubber Substances 0.000 description 3
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 3
- 229920005992 thermoplastic resin Polymers 0.000 description 3
- WNXJIVFYUVYPPR-UHFFFAOYSA-N 1,3-dioxolane Chemical compound C1COCO1 WNXJIVFYUVYPPR-UHFFFAOYSA-N 0.000 description 2
- JWUJQDFVADABEY-UHFFFAOYSA-N 2-methyltetrahydrofuran Chemical compound CC1CCCO1 JWUJQDFVADABEY-UHFFFAOYSA-N 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 2
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 229910013870 LiPF 6 Inorganic materials 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 239000006230 acetylene black Substances 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 239000005001 laminate film Substances 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 150000002892 organic cations Chemical class 0.000 description 2
- 229920002239 polyacrylonitrile Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000007784 solid electrolyte Substances 0.000 description 2
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052723 transition metal Inorganic materials 0.000 description 2
- 150000003624 transition metals Chemical class 0.000 description 2
- 239000013585 weight reducing agent Substances 0.000 description 2
- VAYTZRYEBVHVLE-UHFFFAOYSA-N 1,3-dioxol-2-one Chemical compound O=C1OC=CO1 VAYTZRYEBVHVLE-UHFFFAOYSA-N 0.000 description 1
- GEWWCWZGHNIUBW-UHFFFAOYSA-N 1-(4-nitrophenyl)propan-2-one Chemical compound CC(=O)CC1=CC=C([N+]([O-])=O)C=C1 GEWWCWZGHNIUBW-UHFFFAOYSA-N 0.000 description 1
- 229910018871 CoO 2 Inorganic materials 0.000 description 1
- 229920008712 Copo Polymers 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- 229910015015 LiAsF 6 Inorganic materials 0.000 description 1
- 229910013063 LiBF 4 Inorganic materials 0.000 description 1
- 229910013716 LiNi Inorganic materials 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- NXPZICSHDHGMGT-UHFFFAOYSA-N [Co].[Mn].[Li] Chemical compound [Co].[Mn].[Li] NXPZICSHDHGMGT-UHFFFAOYSA-N 0.000 description 1
- PFYQFCKUASLJLL-UHFFFAOYSA-N [Co].[Ni].[Li] Chemical compound [Co].[Ni].[Li] PFYQFCKUASLJLL-UHFFFAOYSA-N 0.000 description 1
- FKQOMXQAEKRXDM-UHFFFAOYSA-N [Li].[As] Chemical compound [Li].[As] FKQOMXQAEKRXDM-UHFFFAOYSA-N 0.000 description 1
- KLARSDUHONHPRF-UHFFFAOYSA-N [Li].[Mn] Chemical compound [Li].[Mn] KLARSDUHONHPRF-UHFFFAOYSA-N 0.000 description 1
- SOXUFMZTHZXOGC-UHFFFAOYSA-N [Li].[Mn].[Co].[Ni] Chemical compound [Li].[Mn].[Co].[Ni] SOXUFMZTHZXOGC-UHFFFAOYSA-N 0.000 description 1
- ZYXUQEDFWHDILZ-UHFFFAOYSA-N [Ni].[Mn].[Li] Chemical compound [Ni].[Mn].[Li] ZYXUQEDFWHDILZ-UHFFFAOYSA-N 0.000 description 1
- XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical class [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 150000005678 chain carbonates Chemical class 0.000 description 1
- CKFRRHLHAJZIIN-UHFFFAOYSA-N cobalt lithium Chemical compound [Li].[Co] CKFRRHLHAJZIIN-UHFFFAOYSA-N 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 150000005676 cyclic carbonates Chemical class 0.000 description 1
- 150000004292 cyclic ethers Chemical class 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229910003480 inorganic solid Inorganic materials 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 1
- 239000011244 liquid electrolyte Substances 0.000 description 1
- RSNHXDVSISOZOB-UHFFFAOYSA-N lithium nickel Chemical compound [Li].[Ni] RSNHXDVSISOZOB-UHFFFAOYSA-N 0.000 description 1
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 229910001496 lithium tetrafluoroborate Inorganic materials 0.000 description 1
- MCVFFRWZNYZUIJ-UHFFFAOYSA-M lithium;trifluoromethanesulfonate Chemical compound [Li+].[O-]S(=O)(=O)C(F)(F)F MCVFFRWZNYZUIJ-UHFFFAOYSA-M 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000010450 olivine Substances 0.000 description 1
- 229910052609 olivine Inorganic materials 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 229920001748 polybutylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 125000001453 quaternary ammonium group Chemical group 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- TWQULNDIKKJZPH-UHFFFAOYSA-K trilithium;phosphate Chemical class [Li+].[Li+].[Li+].[O-]P([O-])([O-])=O TWQULNDIKKJZPH-UHFFFAOYSA-K 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/08—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/104—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by structure
-
- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular 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
- H01M50/191—Inorganic 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
- H01M50/543—Terminals
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
-
- 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
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/562—Terminals 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
-
- 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
- Embodiments of the present invention relate to a battery and a sealing body unit.
- Batteries such as a primary battery and a secondary battery generally include an electrode body having a positive electrode and a negative electrode, and an exterior member that houses the electrode body.
- the opening of the metal can is sealed with a lid.
- the cover body has a through hole for fixing the output terminal, and the output terminal is fixed in a state of vertically penetrating the cover body through a resin or rubber gasket.
- the gasket also serves as an insulator that avoids direct contact between the output terminal and the lid.
- the output terminal has a head part exposed on the outer surface of the gasket and a shaft part fitted into the gasket.
- the lid of the metal can be provided with a structure for fixing the output terminal in order to exhibit the high sealing performance of the battery together with the gasket.
- a structure for fixing the output terminal in order to exhibit the high sealing performance of the battery together with the gasket can be formed by, for example, deep drawing.
- the other exterior member for housing the battery electrode a thin metal or a laminate of a metal layer and a resin layer can be used. Since such an exterior member is generally lighter than a metal can, use of such an exterior member can provide a battery having a higher energy density per weight.
- the problem to be solved by the present invention is to provide a battery having a terminal structure capable of exhibiting high sealing performance.
- a battery includes an electrode body, a lead electrically connected to the electrode body, an exterior member that accommodates the electrode body and the lead, a gasket, an external terminal, and a restraining member.
- the exterior member includes a terminal connection portion having a thickness of 0.3 mm or less.
- the terminal connection part has a through hole and a rising part extending from the edge of the through hole into the exterior member.
- the rising portion includes a reduced diameter portion that is reduced in diameter along the direction from the edge portion of the through hole toward the inside of the exterior member.
- the gasket has a hollow shaft portion. The hollow shaft portion of the gasket is inserted into the rising portion.
- the external terminal has a first end portion and a second end portion, and includes a terminal shaft portion extending in the axial direction from the first end portion toward the second end portion.
- the terminal shaft portion passes through the shaft portion of the gasket and is electrically connected to the lead.
- the terminal shaft portion includes a reduced diameter portion that is reduced in diameter along the axial direction.
- the restraining member restrains at least a part of the reduced diameter portion of the terminal shaft portion via the reduced diameter portion of the rising portion and the shaft portion of the gasket.
- the inclination angle of the reduced diameter portion of the rising portion with respect to the axial direction of the terminal shaft portion is larger than the inclination angle of the reduced diameter portion of the terminal shaft portion with respect to the axial direction of the terminal shaft portion.
- a sealing body unit includes a sealing body, a gasket, and a terminal.
- the sealing body has a first surface and a second surface as the back surface.
- the sealing body includes a rising portion including a tip protruding from the second surface and a through-hole penetrating the sealing body from the first surface to the tip of the rising portion.
- the through hole includes a tapered portion having a diameter that decreases as it approaches the tip of the rising portion.
- the gasket includes a through hole.
- the terminal has a first end and a second end.
- the terminal includes a main portion extending in the axial direction from the first end toward the second end.
- the main portion includes a reduced diameter portion whose diameter decreases between the first end portion and the second end portion as it approaches the second end portion. At least a part of the gasket is located in the tapered portion of the through hole of the sealing body. At least a part of the reduced diameter portion of the terminal is located in the through hole of the gasket. At least a part of the gasket located in the tapered portion of the through hole of the sealing body is sandwiched between the tapered portion of the sealing body and the reduced diameter portion of the terminal.
- the inclination angle of the tapered portion of the sealing body with respect to the axial direction of the main portion of the terminal is larger than the inclination angle of the reduced diameter portion with respect to the axial direction.
- a battery is provided.
- This battery includes an exterior body, an electrode body, and a sealing body unit according to the second embodiment.
- the exterior body has an opening.
- the electrode body is accommodated in the exterior body.
- the sealing body unit seals the opening of the exterior body.
- the second surface of the sealing body included in the sealing body unit faces the electrode body.
- FIG. 1 is a schematic perspective view of a battery of a first example according to the first embodiment.
- FIG. 2 is a schematic exploded perspective view of an end portion including a positive electrode terminal of the battery of the first example.
- FIG. 3 is a schematic cross-sectional view taken along line III-III ′ of the battery shown in FIG.
- FIG. 4 is an enlarged view of a portion IV in FIG.
- FIG. 5 is a schematic cross-sectional view showing a state before incorporating the positive electrode terminal in the manufacturing process of the example of the battery of the first example.
- FIG. 6 is a schematic perspective view of the battery of the second example according to the first embodiment.
- FIG. 7 is a schematic exploded perspective view of an end including a positive electrode terminal of the battery of the second example.
- FIG. 8 is a schematic cross-sectional view taken along line VIII-VIII ′ of the battery shown in FIG.
- FIG. 9 is a schematic cross-sectional view of a modification of the battery of the second example.
- FIG. 10 is a schematic cross-sectional view of the end portion including the positive electrode terminal of the battery of the third example according to the first embodiment.
- FIG. 11 is a schematic cross-sectional view of an end including the positive electrode terminal of the battery of the fourth example according to the first embodiment.
- FIG. 12 is an enlarged view of a portion XII in FIG.
- FIG. 13 is a schematic perspective view of the sealing body unit of the 1st example which concerns on 2nd Embodiment.
- 14 is a schematic exploded perspective view of the sealing body unit of FIG. FIG.
- FIG. 15 is a schematic sectional view taken along line III-III ′ of the sealing body shown in FIG.
- FIG. 16 is a schematic cross-sectional view of the sealing unit shown in FIG. 13 taken along line IV-IV ′.
- FIG. 17 is an enlarged cross-sectional view of a portion V in FIG.
- FIG. 18 is a schematic cross-sectional view showing a state before the terminal is assembled in the manufacturing process of the example of the sealing body unit of the first example.
- FIG. 19 is a schematic perspective view of a sealing body unit of a second example according to the second embodiment.
- FIG. 20 is a schematic exploded perspective view of the sealing body unit shown in FIG.
- FIG. 21 is a schematic cross-sectional view taken along line IX-IX ′ of the sealing body unit shown in FIG.
- FIG. 22 is a diagram illustrating a manufacturing process of an example of a terminal connection portion of a sealing body that can be included in a sealing body unit according to the second embodiment.
- FIG. 23 is
- a battery includes an electrode body, a lead electrically connected to the electrode body, an exterior member that accommodates the electrode body and the lead, a gasket, an external terminal, and a restraining member.
- the exterior member includes a terminal connection portion having a thickness of 0.3 mm or less.
- the terminal connection part has a through hole and a rising part extending from the edge of the through hole into the exterior member.
- the rising portion includes a reduced diameter portion that is reduced in diameter along the direction from the edge portion of the through hole toward the inside of the exterior member.
- the gasket has a hollow shaft portion. The hollow shaft portion of the gasket is inserted into the rising portion.
- the external terminal has a first end portion and a second end portion, and includes a terminal shaft portion extending in the axial direction from the first end portion toward the second end portion.
- the terminal shaft portion passes through the shaft portion of the gasket and is electrically connected to the lead.
- the terminal shaft portion includes a reduced diameter portion that is reduced in diameter along the axial direction.
- the restraining member restrains at least a part of the reduced diameter portion of the terminal shaft portion via the reduced diameter portion of the rising portion and the shaft portion of the gasket.
- the inclination angle of the reduced diameter portion of the rising portion with respect to the axial direction of the terminal shaft portion is larger than the inclination angle of the reduced diameter portion of the terminal shaft portion with respect to the axial direction of the terminal shaft portion.
- a portion having a small thickness of, for example, 0.3 mm or less of the plate material may be difficult to perform deep drawing because the thickness is small. Therefore, it may be difficult to provide a terminal structure having the same thickness as that which can be provided on the lid of the metal can by deep drawing at the terminal connection portion having a small thickness.
- the inventors have been able to provide a terminal structure capable of exhibiting high sealing performance in a terminal connection portion having a small thickness. That is, the battery according to the first embodiment can be provided with a terminal structure capable of exhibiting high sealing performance in a terminal connection portion having a thickness of 0.3 mm or less. The reason why the terminal structure provided in the terminal connection portion having a small thickness can exhibit high sealing performance in the battery according to the first embodiment will be described below.
- the terminal connection portion of the exterior member has a through hole and a rising portion extending from the edge of the through hole toward the interior of the exterior member.
- the rising portion includes a reduced diameter portion that is reduced in diameter along the direction from the edge portion of the through hole toward the inside of the exterior member.
- a hollow shaft portion of the gasket is inserted into this rising portion.
- the terminal shaft portion of the external terminal passes through this shaft portion of the gasket.
- the terminal shaft portion of the external terminal includes a reduced diameter portion that is reduced in diameter along the axial direction.
- the inclination angle of the rising portion with respect to the axial direction of the terminal shaft portion is larger than the inclination angle of the terminal shaft portion with respect to the axial direction of the terminal shaft portion.
- the portion sandwiched between the reduced diameter portion of the rising portion and the reduced diameter portion of the terminal shaft portion having different inclination angles is the reduced diameter portion of the terminal shaft portion and the rising portion. Receive pressure from the part.
- the restraining member restrains at least a part of the reduced diameter portion of the terminal shaft portion via the reduced diameter portion of the rising portion and the shaft portion of the gasket. Therefore, the pressure applied to the gasket from the reduced diameter portion of the terminal shaft portion is transmitted to the reduced diameter portion of the rising portion, and thus to the restraining member.
- the restraining member can transmit a reaction against the pressure generated from the reduced diameter portion of the terminal shaft portion to the gasket through the reduced diameter portion of the rising portion as a restraining force.
- the gasket can receive pressure from the reduced diameter portion of the terminal shaft portion and pressure and restraining force from the reduced diameter portion of the rising portion. Thanks to this, in the battery according to the first embodiment, high adhesion can be achieved between the terminal shaft portion and the gasket, and between the rising portion and the gasket, and thus high sealing performance is exhibited. be able to.
- the portion sandwiched between the reduced diameter portion of the rising portion and the reduced diameter portion of the terminal shaft portion of the shaft portion of the gasket is the reduced diameter portion of the rising portion of the exterior member and the terminal shaft as described above. Since it receives pressure from the reduced diameter portion of the portion, it can be compressed. Thereby, the axial part of a gasket can contain the part from which thickness differs. Since the diameter-reduced portion of the rising portion and the diameter-reduced portion of the terminal shaft portion are reduced in the direction toward the inside of the exterior member, the diameter-reduced portion of the rising portion and the diameter of the terminal shaft portion of the shaft portion of the gasket are reduced.
- the portion sandwiched between the portions can receive a larger pressure as the portion is farther from the edge of the through hole of the exterior member. Therefore, the portion having the maximum thickness of the shaft portion of the gasket, i.e., the portion that receives little pressure and has a low compression rate, the portion that does not receive pressure and is not compressed, or a part of the shaft portion of the gasket is compressed.
- the portion expanded due to elastic deformation due to this is located closer to the edge of the through hole of the exterior member than the portion having the minimum thickness of the shaft portion of the gasket, that is, the portion compressed greatly by receiving a large pressure Can be done.
- the first portion is more than the second portion, It can be disposed near the edge of the through hole of the exterior member.
- the rising portion of the exterior member included in the battery according to the first embodiment can be formed by burring.
- the burring process can reduce the stress generated in the workpiece as compared with the deep drawing process. Therefore, in the battery according to the first embodiment, the rising portion can be formed by burring in the terminal connection portion having a thickness of 0.3 mm or less. That is, according to the first embodiment, it is possible to provide a battery that can have a terminal structure that can exhibit high sealing performance in a terminal connection portion with a small thickness.
- the inclination angle of the rising part inside the battery, the inclination angle of the terminal shaft part, and the thickness of the gasket shaft part can be measured, for example, by the following procedure.
- a resin is injected into the battery and the resin is cured.
- the cross section of the battery can be obtained while maintaining the positions of the lead, the exterior member, the gasket, the external terminal, and the restraining member.
- the tilt angle can be confirmed, for example, from a cross section obtained by cutting the battery in the x direction, the y direction, and the 45 ° direction with respect to the axial direction of the external terminal.
- the inclination angle of the reduced diameter portion of the rising portion when the reduced diameter portion reaches the tip of the rising portion, the inclination angle at the tip of the rising portion is measured as the inclination angle of the reduced diameter portion of the rising portion.
- the inclination angle of the portion near the tip of the rising portion of the reduced diameter portion is measured as the inclination angle of the reduced diameter portion of the rising portion.
- the inclination angle of the reduced diameter part of the external terminal when the reduced diameter part of the rising part reaches the tip of the rising part, the inclination angle of the part sandwiching a part of the gasket together with the tip of the rising part is It is measured as the inclination angle of the reduced diameter portion.
- the inclination angle of the portion of the reduced diameter portion of the rising portion sandwiching a part of the gasket together with the portion close to the tip of the rising portion is set to the external terminal. Measured as the inclination angle of the reduced diameter part.
- the thickness of the shaft portion of the gasket can be confirmed, for example, from a cross section obtained by cutting the battery along the axial direction of the external terminal.
- the thickness of the gasket shaft portion is measured as the thickness in a direction perpendicular to the surface of the rising portion with which the gasket shaft portion is in contact.
- the battery according to the first embodiment may be a primary battery or a secondary battery.
- An example of the battery according to the first embodiment is a lithium ion secondary battery. Since the battery according to the first embodiment is a battery that can exhibit high sealing performance as described above, the non-aqueous electrolyte secondary battery included in the first embodiment is, for example, moisture in the battery. Intrusion and leakage of the nonaqueous electrolyte can be prevented, and as a result, problems such as battery performance degradation can be prevented.
- the battery according to the first embodiment includes an electrode body, a lead, an exterior member, a gasket, an external terminal, and a restraining member.
- the electrode body can include a positive electrode and a negative electrode.
- the positive electrode can include, for example, a positive electrode current collector, a positive electrode material layer formed thereon, and a positive electrode current collector tab.
- the negative electrode can include, for example, a negative electrode current collector, a negative electrode material layer formed thereon, and a negative electrode current collector tab.
- the positive electrode material layer can include, for example, a positive electrode active material, a conductive agent, and a binder.
- the negative electrode material layer can include, for example, a negative electrode active material, a conductive agent, and a binder.
- the positive electrode material layer and the negative electrode material layer may be disposed to face each other.
- the electrode body may further include a separator disposed between the positive electrode material layer and the negative electrode material layer facing each other.
- the structure of the electrode body is not particularly limited.
- the electrode body can have a stack structure.
- the stack structure has a structure in which the positive electrode and the negative electrode described above are stacked with a separator interposed therebetween.
- the electrode group may have a wound structure.
- the wound structure is a structure in which the positive electrode and the negative electrode described above are stacked with a separator interposed therebetween, and the stacked body thus obtained is wound in a spiral shape.
- the lead is electrically connected to the electrode body.
- the battery according to the first embodiment can include two leads.
- one lead can be electrically connected to the positive electrode of the electrode body, and the other lead is the negative electrode of the electrode body. Can be electrically connected.
- An insulating member can be arranged on the surface of the lead for the purpose of insulating the lead from other members.
- the exterior member accommodates the electrode body and leads therein. Moreover, the exterior member is provided with the terminal connection part whose thickness is 0.3 mm or less.
- the exterior member may have a thickness of 0.3 mm or less in addition to the terminal connection portion. Or the thickness of parts other than a terminal connection part may be larger than 0.3 mm in an exterior member.
- the exterior member can be formed of, for example, a metal, an alloy, or a laminate of a resin layer and a metal layer and / or an alloy layer.
- An exterior member formed of a laminate of a metal, an alloy, or a resin layer and a metal layer and / or an alloy layer can have a thickness of 0.03 mm to 0.3 mm, for example.
- the exterior member may be a single member or may be composed of two or more members.
- the exterior member can have a space for accommodating the electrode body and the lead.
- the space for storing the electrode body and the lead can be provided, for example, by performing shallow drawing on the exterior member to form a recess. Alternatively, shallow drawing is performed on the exterior member to form two recesses, and then the exterior member is bent so that the recesses face each other so that a larger space is formed by combining the spaces of the recesses. Also, the space for accommodating the electrode body and the lead can be provided.
- the exterior member may further include a liquid injection port for injecting an electrolyte, for example, a non-aqueous electrolyte, a safety valve that can release the pressure inside the battery when the battery internal pressure rises above a specified value, and the like.
- an electrolyte for example, a non-aqueous electrolyte
- a safety valve that can release the pressure inside the battery when the battery internal pressure rises above a specified value
- the gasket may include a flange portion for fixing to the terminal connection portion of the exterior member.
- the terminal shaft portion of the external terminal has a first end and a second end.
- the first end portion may be, for example, a flange portion for fixing the terminal shaft portion to the gasket.
- the external terminal is electrically connected to the lead.
- the battery according to the first embodiment can include two external terminals, for example, one external terminal can be connected to a lead that can be electrically connected to the positive electrode of the electrode body, The other external terminal can be connected to a lead that can be electrically connected to the negative electrode of the electrode body.
- the form of connection between the external terminal and the lead is not particularly limited.
- the external terminal and the lead can be connected by further providing a through hole in the lead and fitting the terminal shaft portion of the external terminal into the through hole.
- the external terminal and the lead can also be connected by further providing a through hole in the external terminal and further providing a protrusion on the lead and fitting the protrusion of the lead into the through hole of the external terminal.
- the external terminal and the lead may be fixed by caulking or may be laser welded.
- the restraining member may be, for example, a restraining ring wound around the outer periphery of the rising portion of the exterior member.
- the lead may also serve as a restraining member.
- an oxide or sulfide can be used, for example.
- oxides and sulfides include manganese dioxide (MnO 2 ) that occludes lithium, iron oxide, copper oxide, nickel oxide, lithium manganese composite oxide (eg, Li x Mn 2 O 4 or Li x MnO 2 ), Lithium nickel composite oxide (for example, Li x NiO 2 ), lithium cobalt composite oxide (for example, Li x CoO 2 ), lithium nickel cobalt composite oxide (for example, LiNi 1-y Co y O 2 ), lithium manganese cobalt composite oxide (e.g.
- Li x Mn y Co 1-y O 2 lithium manganese nickel complex oxide having a spinel structure (e.g., Li x Mn 2-y Ni y O 4), lithium phosphates having an olivine structure (e.g., Li x FePO 4, Li x Fe 1- y Mn y PO 4, Li x CoPO 4), iron sulfate (Fe 2 (SO 4) 3 ), vanadium oxides (e.g. Examples thereof include V 2 O 5 ) and lithium nickel cobalt manganese composite oxide.
- these compounds may be used alone, or a plurality of compounds may be used in combination.
- the binder is blended to bind the active material and the current collector.
- the binder include polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVdF), and fluorine-based rubber.
- the conductive agent is blended as necessary in order to enhance the current collecting performance and suppress the contact resistance between the active material and the current collector.
- Examples of the conductive agent include carbonaceous materials such as acetylene black, carbon black, and graphite.
- the positive electrode active material and the binder are preferably blended at a ratio of 80% by mass to 98% by mass and 2% by mass to 20% by mass, respectively.
- a sufficient electrode strength can be obtained by setting the binder to an amount of 2% by mass or more. Moreover, the content of the insulating material of an electrode can be reduced by setting it as 20 mass% or less, and internal resistance can be reduced.
- the positive electrode active material, the binder, and the conductive agent are 77% by mass or more and 95% by mass or less, 2% by mass or more and 20% by mass or less, and 3% by mass or more and 15% by mass or less, respectively. It is preferable to mix
- the conductive agent can exhibit the above-described effects by adjusting the amount to 3% by mass or more. Moreover, by setting it as 15 mass% or less, decomposition
- the positive electrode current collector is preferably an aluminum foil or an aluminum alloy foil containing at least one element selected from Mg, Ti, Zn, Ni, Cr, Mn, Fe, Cu and Si.
- the positive electrode current collector is preferably integral with the positive electrode current collecting tab.
- the positive electrode current collector may be a separate body from the positive electrode current collector tab.
- Negative electrode As a negative electrode active material, the metal oxide, metal nitride, alloy, carbon, etc. which can occlude and discharge
- the conductive agent is blended in order to enhance the current collecting performance and suppress the contact resistance between the negative electrode active material and the current collector.
- Examples of the conductive agent include carbonaceous materials such as acetylene black, carbon black, and graphite.
- the binder is blended to fill a gap between the dispersed negative electrode active materials and to bind the negative electrode active material and the current collector.
- the binder include polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVdF), fluorine-based rubber, and styrene butadiene rubber.
- the active material, the conductive agent, and the binder in the negative electrode material layer are blended at a ratio of 68% by mass to 96% by mass, 2% by mass to 30% by mass, and 2% by mass to 30% by mass, respectively. It is preferable.
- the amount of the conductive agent By setting the amount of the conductive agent to 2% by mass or more, the current collecting performance of the negative electrode layer can be improved. Further, by setting the amount of the binder to 2% by mass or more, the binding property between the negative electrode material layer and the current collector can be sufficiently exhibited, and excellent cycle characteristics can be expected.
- the conductive agent and the binder are each preferably 28% by mass or less in order to increase the capacity.
- the current collector a material that is electrochemically stable at the lithium insertion / release potential of the negative electrode active material is used.
- the current collector is preferably made of copper, nickel, stainless steel or aluminum or an aluminum alloy containing at least one element selected from Mg, Ti, Zn, Mn, Fe, Cu and Si.
- the thickness of the current collector is preferably in the range of 5 to 20 ⁇ m. A current collector having such a thickness can balance the strength and weight reduction of the negative electrode.
- the negative electrode current collector is preferably integral with the negative electrode current collecting tab.
- the negative electrode current collector may be a separate body from the negative electrode current collection tab.
- the negative electrode is prepared by suspending a negative electrode active material, a binder and a conductive agent in a commonly used solvent to prepare a slurry, and applying this slurry to a current collector and drying to form a negative electrode material layer It is produced by applying a press.
- the negative electrode may also be produced by forming a negative electrode active material, a binder, and a conductive agent in the form of a pellet to form a negative electrode material layer, which is disposed on a current collector.
- the separator may be formed of, for example, a porous film containing polyethylene, polypropylene, cellulose, or polyvinylidene fluoride (PVdF), or a synthetic resin nonwoven fabric.
- a porous film formed from polyethylene or a polypropylene can melt
- security can be improved.
- Electrolytic Solution for example, a nonaqueous electrolyte can be used.
- the non-aqueous electrolyte may be, for example, a liquid non-aqueous electrolyte prepared by dissolving an electrolyte in an organic solvent, or a gel non-aqueous electrolyte in which a liquid electrolyte and a polymer material are combined.
- the liquid non-aqueous electrolyte is preferably obtained by dissolving the electrolyte in an organic solvent at a concentration of 0.5 mol / L or more and 2.5 mol / L or less.
- Examples of the electrolyte dissolved in the organic solvent include lithium perchlorate (LiClO 4 ), lithium hexafluorophosphate (LiPF 6 ), lithium tetrafluoroborate (LiBF 4 ), and lithium arsenic hexafluoride (LiAsF 6). ), Lithium trifluoromethanesulfonate (LiCF 3 SO 3 ), and lithium salts such as lithium bistrifluoromethylsulfonylimide [LiN (CF 3 SO 2 ) 2 ], and mixtures thereof.
- the electrolyte is preferably one that is difficult to oxidize even at a high potential, and LiPF 6 is most preferred.
- organic solvents examples include cyclic carbonates such as propylene carbonate (PC), ethylene carbonate (EC), and vinylene carbonate; such as diethyl carbonate (DEC), dimethyl carbonate (DMC), and methyl ethyl carbonate (MEC).
- Chain carbonates cyclic ethers such as tetrahydrofuran (THF), 2 methyltetrahydrofuran (2MeTHF), and dioxolane (DOX); chain ethers such as dimethoxyethane (DME) and diethoxyethane (DEE); ⁇ -butyrolactone (GBL), acetonitrile (AN), and sulfolane (SL) are included.
- These organic solvents can be used alone or as a mixed solvent.
- polymer material examples include polyvinylidene fluoride (PVdF), polyacrylonitrile (PAN), and polyethylene oxide (PEO).
- PVdF polyvinylidene fluoride
- PAN polyacrylonitrile
- PEO polyethylene oxide
- a room temperature molten salt (ionic melt) containing lithium ions a polymer solid electrolyte, an inorganic solid electrolyte, or the like may be used as the non-aqueous electrolyte.
- Room temperature molten salt refers to a compound that can exist as a liquid at room temperature (15 to 25 ° C.) among organic salts composed of a combination of an organic cation and an anion.
- the room temperature molten salt includes a room temperature molten salt that exists alone as a liquid, a room temperature molten salt that becomes liquid when mixed with an electrolyte, and a room temperature molten salt that becomes liquid when dissolved in an organic solvent.
- the melting point of a room temperature molten salt used for a nonaqueous electrolyte battery is 25 ° C. or less.
- the organic cation generally has a quaternary ammonium skeleton.
- Lead As a material of the lead, for example, an aluminum material or an aluminum alloy material can be used. In order to reduce the contact resistance, the material of the lead is preferably the same as the material of the positive electrode current collector or the negative electrode current collector that can be electrically connected to the lead.
- Exterior member is preferably formed of a material having corrosion resistance. As described above, the exterior member can be formed of a laminate of a metal, alloy, or resin layer and a metal layer and / or alloy layer.
- metals and alloys that can form the exterior member include, for example, aluminum, aluminum alloys, and stainless steel.
- the aluminum alloy is preferably an alloy containing elements such as magnesium, zinc, and silicon.
- the alloy contains a transition metal such as iron, copper, nickel, or chromium, the content is preferably 1% by mass or less.
- thermoplastic resin such as polypropylene (PP) and polyethylene (PE) can be used.
- Gasket examples of materials that can form the gasket include fluororesin, fluororubber, polyphenylene sulfide resin (PPS resin), polyether ether ketone resin (PEEK resin), polypropylene resin (PP resin), and polybutylene. Examples thereof include resins such as terephthalate resin (PBT resin).
- PPS resin polyphenylene sulfide resin
- PEEK resin polyether ether ketone resin
- PP resin polypropylene resin
- PBT resin terephthalate resin
- External terminal As the material of the external terminal, for example, the same material as that of the lead can be used.
- Restraint member As a material of the restraint member, for example, aluminum, an aluminum alloy, or a stainless steel material can be used.
- the restraining member can constitute a single member together with the lead as described above, the restraining member may be formed of the same material as the lead.
- Insulating member material examples include tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer (PFA), polypropylene (PP), polyethylene (PE), nylon, polybutylene terephthalate (PBT), polyethylene terephthalate.
- Thermoplastic resins such as tarate (PET), polytetrafluoroethylene (PTFE), polyphenylene sulfide (PPS), and polyetheretherketone (PEEK) can be used.
- the battery according to the first embodiment may include members other than those described above.
- the battery according to the first embodiment can include a clamping member for bundling the positive electrode current collecting tab or the negative electrode current collecting tab.
- This clamping member can be formed of the same material as the bundled positive electrode current collector tab or negative electrode current collector tab, that is, the positive electrode current collector or the negative electrode current collector, for example.
- FIG. 1 is a schematic perspective view of a battery of a first example according to the first embodiment.
- FIG. 2 is a schematic exploded perspective view of an end portion including a positive electrode terminal of the battery of the first example.
- FIG. 3 is a schematic cross-sectional view taken along line III-III ′ of the battery shown in FIG.
- FIG. 4 is an enlarged view of a portion IV in FIG.
- FIG. 5 is a schematic cross-sectional view showing a state before incorporating the positive electrode terminal in the manufacturing process of the example of the battery of the first example.
- the battery 100 of the first example shown in FIGS. 1 to 4 is a nonaqueous electrolyte battery.
- a battery 100 of the first example shown in FIGS. 1 to 4 includes an electrode body 1 shown in FIG. 2, a lead 2 shown in FIGS. 2 to 4, an exterior member 3 shown in FIGS. 4 includes a gasket 4 shown in FIG. 4, two external terminals 5 shown in FIGS. 1 to 4, and a restraining ring 6 as a restraining member shown in FIGS.
- the electrode body 1 shown in FIG. 2 includes a positive electrode, a negative electrode, and a separator.
- the positive electrode includes a strip-shaped positive electrode current collector, a positive electrode material layer formed thereon, and a positive electrode current collector tab.
- the negative electrode includes a strip-shaped negative electrode current collector, a negative electrode material layer formed thereon, and a negative electrode current collector tab.
- the electrode body 1 is formed by stacking a positive electrode, a negative electrode, and a separator so that the positive electrode material layer and the negative electrode material layer are disposed to face each other with a separator interposed therebetween, and winding the laminate thus obtained. Obtained by. During the production of the laminate, the positions of the positive electrode and the negative electrode are adjusted so that the positive electrode current collector tab and the negative electrode current collector tab extend in opposite directions from the wound laminate.
- the electrode body 1 includes a sandwiching portion 11 that sandwiches a positive electrode current collector tab that extends from a wound laminate, and a sandwiching portion that sandwiches a negative electrode current collector tab that extends from a wound laminate (not shown). And an insulating seal 12 that covers portions other than the positive electrode current collecting tab and the negative electrode current collecting tab in the wound laminate.
- the battery 100 of the first example has two leads 2. 2 to 4, only the positive electrode lead 2 is shown among the two leads 2 included in the battery 100 of this example.
- the positive electrode lead 2 includes an electrode connecting portion 21 and a terminal connecting portion 22.
- the electrode connection portion 21 has a belt-like planar shape.
- the electrode connection portion 21 of the positive electrode lead 2 is ultrasonically welded to the holding portion 11 that holds the positive electrode current collecting tab of the electrode body 1.
- the terminal connection part 22 is a plate having a strip-like planar shape, and is provided with a through hole 23.
- the negative electrode lead which is the other of the two leads 2 included in the battery 100 of this example, has the same electrode connection portion and terminal connection portion as the positive electrode lead 2 shown in FIG.
- the electrode connecting portion is ultrasonically welded to a holding portion that holds the negative electrode current collecting tab of the electrode body 1.
- the electrode body 1 and the two leads 2 are housed in an exterior member 3 as shown in FIG.
- the exterior member 3 includes an exterior body 31 and a sealing plate 32 facing the exterior body 31 as shown in FIG. Both the exterior body 31 and the sealing plate 32 are formed of a laminate film having a thickness of 0.3 mm or less made of an aluminum foil, an aluminum alloy foil or a stainless steel foil and a resin film.
- the exterior body 31 includes a main portion 33 having a main surface 33A, two terminal connection portions 34 having a terminal connection surface 34A and a thickness of 0.3 mm or less, and a main surface 35A. And a peripheral edge 35 having the same.
- the main surface 33A of the main portion 33 and the terminal connection surface 34A of the terminal connection portion 34 are not flush with the main surface 35A of the peripheral edge portion 35. Further, the main portion 33 and the terminal connection portion 34 form a recess that widens away from the sealing plate 32.
- the exterior body 31 having such a structure can be formed by subjecting the laminate film to a shallow drawing process.
- the peripheral portion 35 of the exterior body 31 is sealed in a state where the recess of the main portion 33 of the exterior body 31 accommodates the electrode body 1 and each of the two recesses of the terminal connection portion 34 accommodates each of the two leads 2.
- the plate 32 is joined with a heat seal.
- the bonding can be performed by, for example, laser welding instead of heat sealing.
- the exterior member 3 including the exterior body 31 and the sealing plate 32 accommodates the electrode body 1 and the lead 2 inside thereof.
- the terminal connecting portion 34 of the exterior body 31 is provided with a through hole 36.
- the through hole 36 penetrates the terminal connection portion 34.
- the terminal connection portion 34 is provided with a rising portion 37 extending from the edge portion 38 of the through hole 36 into the exterior member 3.
- the rising portion 37 includes a reduced diameter portion 39 having a tapered surface that is reduced in diameter along a direction from the edge 38 of the through hole 36 into the exterior member 3.
- the exterior member 3 is provided with a liquid injection port for injecting a nonaqueous electrolyte.
- the exterior member 3 further accommodates the nonaqueous electrolyte impregnated in the electrode body 1 by injecting a nonaqueous electrolyte from the liquid injection port. can do.
- the liquid injection port is sealed by, for example, laser welding after the nonaqueous electrolyte is injected.
- the gasket 4 shown in FIGS. 1 to 4 includes a flange portion 41 and a shaft portion 42. As shown in FIGS. 3 and 4, the shaft portion 42 extends from the flange portion 41. The shaft portion 42 has a through hole 43 extending in the direction in which the shaft portion 42 extends, and is hollow.
- the flange portion 41 of the gasket 4 is placed on the terminal connection surface 34A of the exterior body 31.
- the shaft portion 42 of the gasket 4 is inserted into the through hole 36 of the rising portion 37 of the exterior body 31. Therefore, the tapered surface of the reduced diameter portion 39 of the rising portion 37 is reflected on the inner surface of the through hole 43 of the shaft portion 42 of the gasket 4 as shown in FIGS.
- the end portion 37 ⁇ / b> A of the rising portion 37 of the exterior member 3 and the end portion 42 ⁇ / b> A of the shaft portion 42 of the gasket 4 are disposed so as to face the terminal connection portion 22 of the positive electrode lead 2.
- the insulating sheet 7 is arranged between the end portion 37A of the rising portion 37 and the end portion 42A of the shaft portion 42 of the gasket 4 and the terminal connection portion 22 of the positive electrode lead 2.
- the insulating sheet 7 has a through hole 71.
- the insulating sheet 7 is such that one edge portion of the through hole 71 is in contact with the edge portion of the through hole 43 of the shaft portion 42 of the gasket 4 and the other edge portion of the through hole 71 is the terminal connection portion 22 of the lead 2. It arrange
- the battery 100 of the first example includes two external terminals, that is, a positive electrode terminal 5 and a negative electrode terminal 5 '. 2 to 4, only the positive electrode terminal 5 is shown.
- the positive electrode terminal 5 includes a flange portion 51 and a terminal shaft portion 52.
- the flange portion 51 has a main surface 51A.
- the terminal shaft portion 52 extends from the flange portion 51 as the first end portion in a direction perpendicular to the main surface 51A of the flange portion 51, that is, the axial direction X shown in FIG.
- the terminal shaft portion 52 includes a reduced diameter portion 53 having a tapered surface that is reduced in diameter as the distance from the flange portion 51 increases.
- the flange portion 51 of the positive electrode terminal 5 is placed on the flange portion 41 of the gasket 4.
- the terminal shaft portion 52 of the positive electrode terminal 5 is arranged so as to pass through the through hole 43 of the gasket 4, the through hole 71 of the insulating sheet 7, and the through hole 23 of the positive electrode lead 2 in this order.
- a part of the reduced diameter portion 53 of the positive electrode terminal 5 is in contact with the inner peripheral surface of the through hole 43 of the gasket 4.
- the tip 54 of the terminal shaft portion 52 that has passed through the through hole 23 of the positive electrode lead 2 is caulked and fixed to the terminal connection portion 22 of the positive electrode lead 2.
- the caulking portion 54 is formed as an end portion of the rim. Such caulking can be performed before the connection between the peripheral edge 35 of the exterior body 31 and the sealing plate 32.
- the restraint ring 6 included in the battery 100 of the first example restrains the rising portion 37 that surrounds a part of the reduced diameter portion 53 of the terminal shaft portion 52 and the shaft portion 42 of the gasket 4.
- the terminal shaft portion 52 of the positive electrode terminal 5 includes the reduced diameter portion 53 having a tapered surface.
- the tapered surface is inclined by an inclination angle ⁇ 1 with respect to the axial direction X of the terminal shaft portion 52 of the positive electrode terminal 5.
- the rising portion 37 of the exterior member 3 also includes the reduced diameter portion 39 having a tapered surface.
- the tapered surface is inclined by an inclination angle ⁇ 2 with respect to the axial direction X of the terminal shaft portion 52 of the positive electrode terminal 5.
- the inclination angle ⁇ 2 of the reduced diameter portion 39 of the rising portion 37 is larger than the inclination angle ⁇ 1 of the reduced diameter portion 53 of the terminal shaft portion 52. That is, the taper of the reduced diameter portion 39 of the rising portion 37 is looser than the taper of the reduced diameter portion 53 of the terminal shaft portion 52.
- FIG. 5 is a schematic cross-sectional view showing a state before the positive electrode terminal is assembled in the manufacturing process of the battery of the first example.
- the shaft portion 42 of the gasket 4 is inserted into the rising portion 37 of the exterior body 31 as shown in FIG. Since the rising portion 37 includes the reduced-diameter portion 39 described above, the peripheral surface of the through hole 43 of the shaft portion 42 of the gasket 4 inserted into the rising portion 37 is formed by the reduced-diameter portion 39 of the rising portion 37. Includes a tapered surface reflecting the taper.
- the reduced diameter portion 53 of the terminal shaft portion 52 of the positive electrode terminal 5 is inserted into the through hole 43 of the gasket 4 so that a part thereof is in contact with the inner peripheral surface of the through hole 43 of the gasket 4.
- the positive electrode terminal 5 is designed such that the outer diameter of at least a part of the reduced diameter part 53 of the terminal shaft part 52 is equal to or larger than the inner diameter of at least a part of the through hole 43 of the gasket 4.
- the shaft portion 42 of the gasket 4 has an inner diameter P 2 of the through hole 43 that is at least part of the reduced diameter portion 53 of the terminal shaft portion 52. A portion smaller than the outer diameter P 1 is included.
- the inner diameter of the through hole 43 of the shaft portion 42 of the gasket 4 is larger than the outer diameter of the reduced diameter portion 53 of the terminal shaft portion 52.
- the smaller portion receives pressure from the reduced diameter portion 53 of the positive electrode terminal 5.
- this portion of the shaft portion 42 of the gasket 4 also receives pressure from the reduced diameter portion 39 of the rising portion 37.
- a portion of the shaft portion 42 of the gasket 4 that receives pressure from the reduced diameter portion 53 of the terminal shaft portion 52 of the positive electrode terminal 5 is a restraining ring as a reaction of pressure originating from the reduced diameter portion 53 of the terminal shaft portion 52. 6 is received through the reduced diameter portion 39 of the rising portion 37.
- the battery 100 of the first example shown in FIGS. 1 to 4 includes a reduced diameter portion 53 between the reduced diameter portion 53 of the terminal shaft portion 52 of the positive electrode terminal 5 and the shaft portion 42 of the gasket 4 and a reduced diameter portion of the rising portion 37.
- High adhesion can be achieved between 39 and the shaft portion 42 of the gasket 4, and as a result, high sealing performance can be achieved.
- the shaft portion 42 of the gasket 4 is sandwiched between the reduced diameter portion 39 of the rising portion 37 and the reduced diameter portion 53 of the terminal shaft portion 52.
- the portion includes a first portion 42 1 having a maximum thickness T 1 and a second portion 42 2 having a maximum thickness T 2 .
- the first portion 42 1 corresponds to the root portion of the flange portion 41 side of the shaft portion 42 of the gasket 4.
- the second portion 42 2 corresponds to the tip portion of the shaft portion 42 that is close to the insulating sheet 7. That is, the first portion 42 1 is more edged than the second portion 42 2 in the through hole of the terminal connecting portion 34 (not shown in FIG.
- the negative electrode terminal 5 ′ included in the battery 100 of the first example shown in FIGS. 1 to 4 has the same structure and arrangement as the positive electrode terminal 5. Therefore, the battery 100 of the first example shown in FIGS. 1 to 4 can achieve high sealing performance even in the negative electrode terminal 5 ′.
- the battery 100 of the first example shown in FIGS. 1 to 4 is a nonaqueous electrolyte battery as described above. Since the battery 100 of the first example can exhibit high sealing performance, it is possible to prevent leakage of the nonaqueous electrolyte and intrusion of moisture. Thanks to this, the battery 100 of the first example can prevent problems such as battery performance degradation.
- the rising portion 37 extends with a reduced diameter toward the inside of the exterior member 3 as shown in FIGS. 3 and 4.
- a rising portion 37 can be deformed so as to tighten each of the terminal shaft portions 52 (one not shown) of the external terminals 5 and 5 ′ surrounded by them. That is, the battery 100 of the first example can maintain high sealing performance even when the internal pressure of the battery 100 increases.
- FIG. 6 is a schematic perspective view of the battery of the second example according to the first embodiment.
- FIG. 7 is a schematic exploded perspective view of an end including a positive electrode terminal of the battery of the second example.
- FIG. 8 is a schematic cross-sectional view taken along line VIII-VIII ′ of the battery shown in FIG.
- the battery 100 'of the second example shown in FIGS. 6 to 8 is a non-aqueous electrolyte battery.
- a battery 100 ′ of the second example shown in FIGS. 6 to 8 includes an electrode body 1 shown in FIG. 7, a lead 8 shown in FIGS. 7 and 8, an exterior member 3 shown in FIGS.
- the gasket 4 shown in FIGS. 6 to 8 and the two external terminals 9 and 9 ′ shown in FIGS. 6 to 8 are provided.
- the electrode body 1 shown in FIG. 7, the exterior member 3 shown in FIGS. 6 to 8, and the gasket 4 shown in FIGS. 6 to 8 are the electrode bodies included in the battery 100 of the first example shown in FIGS. 1, the exterior member 3 and the gasket 4 are the same. Therefore, the description about these is abbreviate
- the battery 100 ′ of the second example has two leads 8. 7 and 8, only the positive electrode lead 8 is shown among the two leads 8 included in the battery 100 ′ of this example.
- the positive electrode lead 8 includes an electrode connection portion 81 and a terminal connection portion 82.
- the electrode connecting portion 81 has a belt-like planar shape.
- the electrode connecting portion 81 of the positive electrode lead 8 is ultrasonically welded to the holding portion 11 that holds the positive electrode current collecting tab of the electrode body 1.
- the terminal connection portion 82 is a plate shape having a strip-like planar shape, and a rod-like connection protrusion 83 is provided on the main surface.
- the terminal connection portion 82 is further provided with a restraining protrusion 84.
- the restraining protrusion 84 has an annular plane shape, and this ring is a ring centering on the connection protrusion 83.
- the negative electrode lead which is the other of the two leads 8 included in the battery 100 ′ of this example, is similar to the positive electrode lead 8 shown in FIG.
- the electrode connecting portion is ultrasonically welded to a holding portion that holds the negative electrode current collecting tab of the electrode body 1.
- the electrode body 1 and the two leads 8 are housed in the exterior member 3 as shown in FIG.
- the peripheral portion 35 of the exterior body 31 has the concave portion of the main portion 33 of the exterior body 31 accommodating the electrode body 1 and terminal connection.
- Each of the two concave portions of the portion 34 is heat sealed to the sealing plate 32 in a state in which each of the leads 8 is accommodated.
- the exterior member 3 including the exterior body 31 and the sealing plate 32 accommodates the electrode body 1 and the leads 8 inside thereof.
- the nonaqueous electrolyte impregnated in the electrode body 1 is also accommodated in the exterior member 3, similarly to the battery 100 of the first example.
- the flange portion 41 of the gasket 4 is placed on the terminal connection surface 34 ⁇ / b> A of the exterior body 31. Further, the shaft portion 42 of the gasket 4 is inserted into the through hole 36 of the rising portion 37 of the exterior body 31. Therefore, the tapered surface of the reduced diameter portion 39 of the rising portion 37 is reflected on the inner surface of the through hole 43 of the shaft portion 42 of the gasket 4 as shown in FIG.
- the end portion 42 ⁇ / b> A of the shaft portion 42 of the gasket 4 and the end portion 37 ⁇ / b> A of the rising portion 37 are disposed so as to face the positive electrode lead 8.
- the end portion 42 ⁇ / b> A of the shaft portion 42 of the gasket 4 is in contact with the terminal connection portion 82 of the positive electrode lead 8.
- the end portion 37 ⁇ / b> A of the rising portion 37 faces the terminal connecting portion 82 of the positive electrode lead 8 with the insulating ring 7 ′ interposed therebetween.
- the rising portion 37 is opposed to the restraining protrusion 84 of the positive electrode lead 8 with the insulating ring 7 'interposed therebetween.
- the insulating ring 7 ′ is sandwiched between the rising portion 37 of the terminal connection portion 34 and the restraining protrusion 84 of the positive electrode lead 8, so that the portion that contacts the rising portion 37 of the terminal connection portion 34 is formed.
- the surface shape of the rising portion 37 is reflected to be deformed, and the portion of the positive electrode lead 8 that is in contact with the restraining protrusion 84 is deformed to reflect the surface shape of the restraining protrusion 84.
- the battery 100 ′ of the second example shown in FIGS. 6 to 8 includes two external terminals, that is, a positive electrode terminal 9 and a negative electrode terminal 9 ′. 7 and 8, only the positive electrode terminal 9 is shown.
- the positive electrode terminal 9 includes a flange portion 91 and a terminal shaft portion 92.
- the flange portion 91 has a main surface 91A.
- the terminal shaft portion 92 extends from the flange portion 91 as the first end portion in the direction perpendicular to the main surface 91A of the flange portion 91, that is, in the axial direction X, and the shaft end portion 92A as the second end portion. have.
- the terminal shaft portion 92 includes a reduced diameter portion 93 having a tapered surface that is reduced in diameter as the distance from the flange portion 91 increases.
- the positive electrode terminal 9 has a through hole 94 starting from the main surface 91 ⁇ / b> A of the flange portion 91 and reaching the shaft end portion 92 ⁇ / b> A of the terminal shaft portion 92.
- the flange portion 91 of the positive electrode terminal 9 is placed on the flange portion 41 of the gasket 4. Further, as shown in FIG. 8, the terminal shaft portion 92 of the positive electrode terminal 9 passes through the through hole 43 of the gasket 4, and the shaft end portion 92 ⁇ / b> A is in contact with the terminal connection portion 82 of the positive electrode lead 8. Further, the connection protrusion 83 of the positive electrode lead 8 is fitted into the through hole 94 of the positive electrode terminal 9. The end portion of the connection protrusion 83 of the positive electrode lead 8 is welded to the main surface 91A of the flange portion 91 of the positive electrode terminal 9.
- the diameter-reduced portion 93 of the positive electrode terminal 9 and the rising portion 37 surrounding the shaft portion of the gasket 4 are further restrained by restraining protrusions 84 provided on the positive electrode lead 8. That is, in the battery 100 ′ of the second example, the positive electrode lead 8 also serves as a restraining member similar to the restraining ring 6 included in the battery 100 of the first example.
- the terminal shaft portion 92 of the positive electrode terminal 9 includes the reduced diameter portion 93 having a tapered surface. As shown in FIG. 8, the tapered surface is inclined by an inclination angle ⁇ 1 with respect to the axial direction X of the terminal shaft portion 92 of the positive electrode terminal 9. As described above, the rising portion 37 of the exterior member 3 also includes the reduced diameter portion 39 having a tapered surface. As shown in FIG. 8, the tapered surface is inclined by an inclination angle ⁇ 2 with respect to the axial direction X of the terminal shaft portion 92 of the positive electrode terminal 9.
- the inclination angle ⁇ 2 of the reduced diameter portion 39 of the rising portion 37 is larger than the inclination angle ⁇ 1 of the reduced diameter portion 93 of the terminal shaft portion 92 of the positive electrode terminal 9. That is, the taper of the reduced diameter portion 39 of the rising portion 37 is looser than the taper of the reduced diameter portion 93 of the positive electrode terminal 9.
- the shaft portion 42 of the gasket 4 sandwiched between the reduced diameter portion 93 of the terminal shaft portion 92 and the reduced diameter portion 39 of the rising portion 37 having tapered surfaces with different inclination angles is the battery of the first example.
- pressure is received from the reduced diameter portion 93 of the terminal shaft portion 92 and the reduced diameter portion 39 of the rising portion 37.
- the shaft portion 42 of the gasket 4 in the battery 100 ′ of the second example starts from the reduced diameter portion 93 of the terminal shaft portion 92, similarly to the shaft portion 42 of the gasket 4 in the battery 100 of the first example.
- a restraining force from the restraining protrusion 84 as a reaction of pressure is received through the reduced diameter portion 39 of the rising portion 37. Therefore, the battery 100 ′ of the second example can achieve high sealing performance for the same reason as the battery 100 of the first example.
- the battery 100 'of the second example shown in FIGS. 6 to 8 is a non-aqueous electrolyte battery as described above. Since the battery 100 ′ of the second example can exhibit high sealing performance, it is possible to prevent leakage of nonaqueous electrolyte and intrusion of moisture. Thanks to this, the battery 100 ′ of the second example can prevent problems such as battery performance degradation.
- the rising portion 37 extends with a reduced diameter toward the inside of the exterior member 3 as shown in FIG.
- a rising portion 37 can be deformed so as to tighten each of the terminal shaft portions 92 (one of which is not shown) of the external terminals 9 and 9 ′ surrounded by them. That is, the battery 100 ′ of the second example can maintain high sealing performance even when the internal pressure of the battery 100 ′ increases.
- the positive lead 2 and the restraining ring 6 of the battery 100 of the first example shown in FIGS. 1 to 4 may be changed to the positive lead 8 similar to the positive lead 8 shown in FIG. Is possible.
- the positive electrode lead 8 has a restraining projection 84 but no connection projection.
- FIG. 10 is a schematic cross-sectional view of the end portion including the positive electrode terminal of the battery of the third example according to the first embodiment.
- a battery 100 of the third example shown in FIG. 10 is a nonaqueous electrolyte battery.
- a battery 100 of the third example shown in FIG. 10 includes an electrode body (not shown), two leads 2 (one is not shown), an exterior member 3, a gasket 4, and two external terminals 5 ( One of which is not shown), a restraining ring 6 and an insulating sheet 7.
- the battery 100 of the third example includes two external terminals 5, that is, a positive electrode terminal and a negative electrode terminal, only the positive electrode terminal 5 is shown in FIG.
- the negative electrode terminal (not shown) has the same structure as the positive electrode terminal 5 shown in FIG. 10 and is incorporated in the battery 100 in the same arrangement.
- the electrode body (not shown), the lead 2, the exterior member 3, the restraining ring 6, and the insulating sheet 7 are the electrode body 1, the lead 2, and the exterior member 3 included in the battery 100 of the first example shown in FIGS.
- the gasket 4 included in the battery 100 of the third example shown in FIG. 10 is different from the gasket 4 included in the battery 100 of the first example shown in FIGS. That is, the gasket 4 shown in FIG. 10 has a recess 41 ⁇ / b> B that is a depression on the main surface 41 ⁇ / b> A that contacts the positive electrode terminal 5.
- the main surface of the gasket 4 having the recess 41 ⁇ / b> B is the back surface of the mounting surface 41 ⁇ / b> C in which the flange portion 41 of the gasket 4 is in contact with the terminal connection portion 34.
- the placement surface 41 ⁇ / b> C is in contact with the edge 38 of the through hole (not shown in FIG. 10) of the exterior body 31.
- the shaft portion 42 of the gasket 4 extends from the mounting surface 41 ⁇ / b> C of the gasket 4 into the exterior member 3.
- the positive electrode terminal 5 shown in FIG. 10 has a protrusion 51 ⁇ / b> D protruding from the mounting surface 51 ⁇ / b> C in contact with the gasket 4 of the portion 51 ⁇ / b> B mounted on the gasket 4 of the flange portion 51.
- the placement surface 51 ⁇ / b> C of the part 51 ⁇ / b> B of the flange part 51 is the back surface of the main surface 51 ⁇ / b> A of the flange part 51, which is the end face of the part 51 ⁇ / b> B of the flange part 51.
- the recess 41B of the gasket 4 corresponds to the protrusion 51B of the positive electrode terminal 5.
- the protrusion 51 ⁇ / b> B of the positive electrode terminal 5 is fitted in the recess 41 ⁇ / b> B of the gasket 4.
- the gasket 4 is shown in FIG. 10 can be prevented from moving in the direction Y and the direction Y ′. That is, in the battery 100 of the third example, the shaft portion 42 of the gasket 4 can remain between the rising portion 37 and the terminal shaft portion 52. As a result, the shaft portion 42 of the gasket 4 can receive a stronger compressive force. That is, the battery 100 of the third example can include a terminal connection portion with higher sealing performance.
- FIG. 11 is a schematic cross-sectional view of the end including the positive electrode terminal of the battery of the fourth example according to the first embodiment.
- FIG. 12 is an enlarged view of a portion XII in FIG.
- the battery 100 of the fourth example shown in FIGS. 11 and 12 is a non-aqueous electrolyte battery.
- a battery 100 of the fourth example shown in FIGS. 11 and 12 includes an electrode body (not shown), two leads 2 (one is not shown), an exterior member 3, a gasket 4, and two external terminals. 5 (one is not shown), a restraining ring 6 and an insulating sheet 7.
- the battery 100 of the fourth example includes two external terminals 5, that is, a positive electrode terminal and a negative electrode terminal, but only the positive electrode terminal 5 is shown in FIGS.
- the negative electrode terminal (not shown) has the same structure as the positive electrode terminal 5 shown in FIGS. 11 and 12, and is incorporated in the battery 100 in the same arrangement.
- the electrode body (not shown), the gasket 4, the lead 2, the exterior member 3, the restraint ring 6, and the insulating sheet 7 are the electrode body 1, the lead 2, the battery 100 of the first example shown in FIGS.
- the exterior member 3, the restraining ring 6, and the insulating sheet 7 are the same. Therefore, the description about these is abbreviate
- the positive electrode terminal 5 included in the battery 100 of the fourth example shown in FIGS. 11 and 12 is different from the positive electrode terminal 5 included in the battery 100 of the first example shown in FIGS. Different. That is, in the positive electrode terminal 5 shown in FIGS. 11 and 12, the reduced diameter portion 53 of the terminal shaft portion 52 includes a step portion 53B on the peripheral surface 53A. Therefore, the terminal shaft portion 52 includes a portion 55 having a smallest diameter between the reduced diameter portion 53 and the caulking portion 54, that is, a diameter smaller than the diameter of the stepped portion 53 ⁇ / b> B of the reduced diameter portion 53. Contains.
- the battery 100 of the fourth example has the adhesiveness between the gasket 4 and the exterior member 3 and the gasket 4 and the positive electrode terminal 5 in a portion that can be a fluid path. The adhesion between the two can be improved. As a result, the battery 100 of the fourth example can be provided with a terminal structure that can exhibit better sealing performance in the terminal connection portion 34 of the exterior member 3.
- the battery according to the first embodiment described above includes an exterior member that accommodates an electrode body and leads, a gasket, an external terminal, and a restraining member.
- the exterior member includes a terminal connection portion having a thickness of 0.3 mm or less.
- the terminal connection portion has a through hole having a rising portion.
- the gasket has a hollow shaft portion inserted in the rising portion.
- the external terminal includes a terminal shaft portion, and the terminal shaft portion includes a reduced diameter portion.
- the restraining member restrains at least a part of the reduced diameter portion of the terminal shaft portion via the reduced diameter portion of the rising portion and the shaft portion of the gasket.
- the inclination angle of the rising portion is larger than the inclination angle of the terminal shaft portion.
- the battery according to the first embodiment can include a terminal structure that can exhibit high sealing performance in a terminal connection portion with a small thickness.
- a sealing body unit includes a sealing body, a gasket, and a terminal.
- the sealing body has a first surface and a second surface as the back surface.
- the sealing body includes a rising portion including a tip protruding from the second surface and a through-hole penetrating the sealing body from the first surface to the tip of the rising portion.
- the through hole includes a tapered portion having a diameter that decreases as it approaches the tip of the rising portion.
- the gasket includes a through hole.
- the terminal has a first end and a second end.
- the terminal includes a main portion extending in the axial direction from the first end toward the second end.
- the main portion includes a reduced diameter portion whose diameter decreases between the first end portion and the second end portion as it approaches the second end portion. At least a part of the gasket is located in the tapered portion of the through hole of the sealing body. At least a part of the reduced diameter portion of the terminal is located in the through hole of the gasket. At least a part of the gasket located in the tapered portion of the through hole of the sealing body is sandwiched between the tapered portion of the sealing body and the reduced diameter portion of the terminal.
- the inclination angle of the tapered portion of the sealing body with respect to the axial direction of the main portion of the terminal is larger than the inclination angle of the reduced diameter portion with respect to the axial direction.
- the sealing body in the sealing body unit according to the second embodiment corresponds to the battery exterior member according to the first embodiment.
- the tapered part of the through hole of the sealing body corresponds to the reduced diameter part of the rising part of the exterior member in the battery according to the first embodiment.
- the terminal corresponds to the external terminal of the battery according to the first embodiment.
- the main part of the terminal corresponds to the terminal shaft part of the external terminal in the battery according to the first embodiment.
- the sealing body unit in the sealing body unit according to the second embodiment, at least a part of the gasket is sandwiched between the tapered portion of the sealing body and the reduced diameter portion of the terminal, and the tapered portion and the reduced diameter portion are The inclination angles with respect to the axial direction of the terminals are different from each other.
- the portion of the gasket sandwiched in this way receives pressure from the reduced diameter portion of the terminal and the tapered portion of the sealing body.
- the through hole passing through the portion of the gasket located in the through hole of the sealing body has a reduced diameter portion of the terminal.
- a portion smaller than the diameter can be included in a portion close to the tip of the rising portion of the sealing body. Therefore, among the portions of the gasket sandwiched between the tapered portion and the reduced diameter portion, the portion located near the tip of the rising portion can receive a large pressure.
- the part of the gasket that has received a large pressure from the sealing body and the terminal can give the sealing body and the terminal a repulsive elastic force as a reaction. Thanks to this, in the sealing body unit according to the second embodiment, it is possible to improve the adhesion between the sealing body and the gasket and the adhesion between the gasket and the terminal at a position close to the tip of the rising portion of the sealing body. it can. As a result, the sealing body unit according to the second embodiment can exhibit excellent sealing performance in the portion where the terminals are provided.
- the portion of the gasket sandwiched between the tapered portion of the sealing body and the reduced diameter portion of the terminal receives pressure from the tapered portion and the reduced diameter portion, and thus can be compressed.
- the portion located near the tip of the rising portion can receive a large pressure and can be greatly compressed.
- the portion of the gasket sandwiched between the tapered portion and the reduced diameter portion has the maximum thickness, that is, the portion that does not receive much pressure and has a low compression rate or is not subjected to pressure and is compressed.
- the part that has expanded due to the elastic deformation caused by the compression of a part of the gasket or the part of the gasket is higher than the part having the minimum thickness of the gasket, that is, the part that is greatly compressed under a large pressure. It can be arranged far from the tip of the part. That is, the portion having the maximum thickness in the portion sandwiched between the tapered portion and the reduced diameter portion of the gasket is defined as the first portion, and the minimum thickness in the portion sandwiched between the tapered portion and the reduced diameter portion of the gasket. If the portion having the second portion is the second portion, the second portion can be disposed closer to the tip of the rising portion of the sealing body than the first portion.
- the rising portion of the sealing body described above may have a thickness, that is, a thickness of 0.3 mm or less.
- a portion having a small thickness of, for example, 0.3 mm or less of the plate material may be difficult to perform deep drawing because the thickness is small. Therefore, it may be difficult to provide a terminal connection portion having a small thickness with a terminal structure similar to that which can be provided on a thick plate material by deep drawing.
- the terminal structure which can exhibit high sealing performance can be provided in the standing part of the sealing body which may be 0.3 mm or less in thickness. Thanks to this, it is possible to achieve both weight reduction and sealing performance of the battery.
- the sealing body may not have a uniform thickness.
- the sealing body can include a rising portion having a first thickness and a portion having a second thickness larger than the first thickness.
- the sealing body unit according to the second embodiment may be manufactured separately from the battery exterior member. Thanks to this, the sealing body unit according to the second embodiment has a large wall thickness, and can thereby provide a battery having high strength as a whole battery by being combined with a high strength exterior member.
- the sealing body unit according to the second embodiment may further include a restraining member surrounding the rising portion of the sealing body.
- the rising portion can be sandwiched between at least a part of the gasket and the restraining member.
- the portion of the gasket that sandwiches the rising portion together with the restraining member is the portion that is sandwiched between the tapered portion of the sealing body and the reduced diameter portion of the terminal.
- the pressure applied to the gasket from the reduced diameter portion of the terminal is transmitted to the rising portion and eventually to the restraining member.
- the restraining member can transmit a reaction against the pressure generated from the reduced diameter portion of the terminal to the gasket as a restraining force through the rising portion. Thanks to this, in the sealing body unit according to this aspect, a part of the gasket can receive pressure from the reduced diameter portion of the terminal and can receive pressure and restraining force from the rising portion. As a result, in the sealing body unit according to this aspect, it is possible to achieve higher adhesion between the terminal and the gasket and between the sealing body and the gasket, and thus to exhibit higher sealing performance. .
- the rising portion and the through hole of the sealing body included in the sealing body unit according to the second embodiment can be formed by, for example, burring.
- the burring process can reduce the stress generated in the workpiece as compared with the deep drawing process. Therefore, in the sealing body unit according to the second embodiment, the rising portion and the through hole can be formed by burring even at a place where the thickness is 0.3 mm or less. That is, according to the second embodiment, it is also possible to provide a sealing body unit that can have a terminal structure that can exhibit high sealing performance in a terminal connection portion having a small thickness.
- the inclination angle of the tapered portion of the sealing body, the inclination angle of the reduced diameter portion of the terminal, and the thickness of the gasket can be measured, for example, by the following procedure.
- a resin is injected into the battery and the resin is cured.
- the cross section of the battery can be obtained while maintaining the positions of the sealing member, the gasket, the terminal, and the restraining member.
- the inclination angle can be confirmed, for example, from a cross section obtained by cutting the battery in the x direction, the y direction, and the 45 ° direction with respect to the axial direction of the terminal.
- the inclination angle of the taper portion of the sealing body when the taper portion reaches the tip of the rising portion, the inclination angle at the tip of the rising portion is measured as the inclination angle of the taper portion.
- the inclination angle of the portion near the tip of the rising portion of the taper portion is measured as the inclination angle of the taper portion.
- the inclination angle of the diameter-reduced portion of the terminal when the taper portion extends to the tip of the rising portion, the angle of inclination of the portion of the reduced diameter portion sandwiching a part of the gasket together with the tip of the rising portion is reduced. Measured as the angle of inclination of the part.
- the inclination angle of the part of the reduced diameter part sandwiching part of the gasket as well as the part near the tip of the taper part of the rising part is reduced. It is measured as the inclination angle of the diameter part.
- the thickness of the gasket can be confirmed, for example, from a cross section obtained by cutting the battery along the axial direction of the terminal.
- the thickness of the gasket is measured as a thickness in a direction perpendicular to the surface of the through hole of the sealing body with which the gasket is in contact.
- sealing body unit If the sealing body unit is not built in the battery, immerse the sealing body unit in the resin, cure the resin, and then cut the sealing body unit to keep the position of the sealing body, gasket, and terminal.
- the cross section of the sealing body unit can be obtained.
- the sealing body may further include a liquid injection port for injecting an electrolytic solution, for example, a nonaqueous electrolyte, a safety valve that can release the pressure inside the battery when the battery internal pressure rises to a specified value or more.
- an electrolytic solution for example, a nonaqueous electrolyte
- a safety valve that can release the pressure inside the battery when the battery internal pressure rises to a specified value or more.
- the gasket may include a flange portion for fixing the gasket to the sealing body.
- the main part of the terminal has a first end and a second end.
- the first end portion may be, for example, a flange portion for fixing the terminal to the gasket.
- the sealing body unit according to the second embodiment can further include a lead.
- the lead can face the second surface of the sealing body.
- the sealing body unit may have two rising portions.
- the sealing body unit can include two terminals and two leads.
- the form of connection between the terminal and the lead is not particularly limited.
- the terminal may be further provided with a recess or a through-hole, and further provided with a protrusion on the surface of the lead facing the second surface of the sealing body, and the lead protrusion may be fitted into the recess or the through-hole of the terminal.
- the terminal and the lead can be connected.
- the recess can be provided, for example, at the second end of the main portion of the terminal.
- the through hole can penetrate, for example, from the first end of the main part of the terminal to the second end.
- the terminal and the lead may be fixed by caulking or may be laser welded.
- the restraining member may be, for example, a restraining ring wound around the outer periphery of the rising portion of the sealing body.
- the lead may also serve as a restraining member.
- the lead may further include a portion surrounding the rising portion of the sealing body, for example, a protrusion.
- the sealing body unit according to the second embodiment may further include an insulating member in order to achieve electrical insulation between the sealing body and the terminals, leads, and restraining members.
- materials of the gasket, the restraining member, the lead, and the insulating member that can be used in the sealing body unit according to the second embodiment for example, those materials mentioned in the description of the first embodiment can be used.
- materials of the gasket, the restraining member, the lead, and the insulating member that can be used in the sealing body unit according to the second embodiment for example, those materials mentioned in the description of the first embodiment can be used.
- materials of the gasket, the restraining member, the lead, and the insulating member that can be used in the sealing body unit according to the second embodiment for example, those materials mentioned in the description of the first embodiment can be used.
- a material of the terminal that can be used in the sealing body unit according to the second embodiment for example, the material of the external terminal mentioned in the description of the first embodiment can be used.
- the sealing body can be formed of, for example, a metal, an alloy, a resin, or a laminate of a resin layer and a metal layer and / or an alloy layer. It is preferable that the sealing body is formed of the same material as the exterior member that constitutes the battery in combination.
- the sealing body is preferably formed of a material having corrosion resistance.
- metals and alloys that can form a sealing body include aluminum, aluminum alloys, and stainless steel.
- the aluminum alloy is preferably an alloy containing elements such as magnesium, zinc, and silicon.
- the alloy contains a transition metal such as iron, copper, nickel, or chromium, the content is preferably 1% by mass or less.
- Examples of the resin capable of forming the sealing member include super engineering plastics such as PPS resin and PEEK resin.
- thermoplastic resin such as polypropylene (PP) and polyethylene (PE) can be used.
- FIG. 13 is a schematic perspective view of a sealing body unit of a first example according to the second embodiment.
- 14 is a schematic exploded perspective view of the sealing body unit of FIG.
- FIG. 15 is a schematic sectional view taken along line III-III ′ of the sealing body shown in FIG.
- FIG. 16 is a schematic cross-sectional view of the sealing unit shown in FIG. 13 taken along line IV-IV ′.
- FIG. 17 is an enlarged cross-sectional view of a portion V in FIG.
- FIG. 18 is a schematic cross-sectional view showing a state before the terminal is assembled in the manufacturing process of the example of the sealing body unit of the first example.
- a sealing body unit 10 of the first example shown in FIGS. 13 to 18 includes a sealing body 120 shown in FIGS. 13 to 18, two terminals 130 shown in FIGS. 13, 14, and 16 to 18, FIG. 14 and FIGS. 16 to 18, two gaskets 140, two restraining members 150 shown in FIGS. 14 and 16 to 18, two insulating members 160 shown in FIGS. 14 and 16 to 18, and FIG. 13. , And two leads 170 shown in FIGS. 16 to 18 are provided.
- the sealing body 120 is a plate-like member. As shown in FIG. 15, the sealing body 120 has a first surface 120A and a second surface 120B as the back surface thereof.
- the sealing unit 10 of the first example corresponds to the exterior body 31 in the battery 100 described with reference to FIGS.
- the sealing body 120 includes a recess 124A and a recess 124B that is further recessed from a part of the bottom of the recess 124A on the first surface 120A side.
- the edge 124E of the recess 124A is rounded.
- the terminal connection portion 121 corresponds to the terminal connecting portion 121 shown in FIG.
- the terminal connection portion 121 has a thickness t that is 0.3 mm or less.
- the terminal connection portion 121 has a rising portion 123 that includes a tip 123 ⁇ / b> E protruding from the second surface 120 ⁇ / b> B of the sealing body 2.
- the sealing body 120 further includes a through-hole 122 that penetrates the sealing body 120 from the first surface 120A to the tip 123E of the rising portion 123 in a direction intersecting the first surface 120A.
- the through-hole 122 includes a tapered portion 122R whose diameter decreases as it approaches the tip 123E of the rising portion 123.
- the rising portion 123 including the portion provided with the tapered portion 122R has a substantially constant thickness t as shown in FIG.
- the sealing body 120 is further provided with a safety valve 125 shown in FIGS. 13 and 14 and a liquid injection port 126 shown in FIGS. 13 and 14.
- the gasket 140 includes a flange portion 141 and a shaft portion 142 extending downward from the flange portion 141. Further, the gasket 140 further includes a through hole 143 that penetrates the shaft portion 142 in a direction in which the shaft portion 142 extends. As shown in FIGS. 16 to 18, the diameter of the through hole 143 decreases as the distance from the flange portion 141 increases.
- the flange portion 141 of the gasket 140 is placed on the bottoms of the recesses 124A and 124B of the sealing body 120. Further, the shaft portion 142 of the gasket 140 is inserted into the through hole 122 that penetrates the sealing body 120. Therefore, a part 142A of the shaft portion 142 of the gasket 140 is located in the through hole 122 of the sealing body. And the taper surface of the taper part 122R of the through-hole 122 of the sealing body 120 is reflected in a part of inner peripheral surface of the through-hole 143 of the axial part 142 of the gasket 140, as shown in FIG. The tapered portion 122R of the through hole 122 of the sealing body 120 corresponds to the reduced diameter portion 39 of the rising portion 37 in the battery 100 described with reference to FIGS.
- the lead 170 includes two electrode connection portions 171 and a terminal connection portion 172 that connects them.
- the electrode connecting portion 171 has a belt-like planar shape.
- the terminal connection portion 172 is a plate having a strip-like planar shape, and is provided with a through hole 173.
- the terminal connecting portion 172 of the lead 170 is disposed so as to face the second surface 120B of the sealing body 120. Further, the leading end 123E of the rising portion 123 of the sealing body 120 and the leading end 142E of the shaft portion 142 of the gasket 140 are disposed so as to face the terminal connecting portion 172 of the lead 170. Further, as shown in FIGS. 16 to 18, an insulating member 160 is disposed between the tip 123E of the rising portion 123, the tip 142E of the shaft portion 142 of the gasket 140, and the terminal connection portion 172 of the lead 170. . As shown in FIG. 14, the insulating member 160 is a strip-shaped member provided with a through hole 161. As shown in FIG.
- the insulating member 160 has one edge of the through hole 161 in contact with the tip 142E of the shaft 142 of the gasket 140, and the other edge of the through hole 161 is a terminal of the lead 170.
- the connection portion 172 is arranged so as to be in contact with the edge portion of the through hole 173.
- the terminal 130 includes a flange portion 131 and a main portion 132.
- the flange portion 131 has a main surface 131A.
- the main portion 132 extends from the flange portion 131 as a first end portion in a direction perpendicular to the main surface 131A of the flange portion 131, that is, in the axial direction X.
- the main portion 132 includes a reduced diameter portion 133 having a tapered surface whose diameter decreases as the distance from the flange portion 131 increases.
- the flange portion 131 of the terminal 130 is placed on the flange portion 141 of the gasket 140.
- This terminal 130 corresponds to the positive electrode terminal 5 in the battery 100 described with reference to FIGS.
- the main portion 132 of the terminal 130 corresponds to the terminal shaft portion 52 of the positive electrode terminal 5 in the battery 100 described with reference to FIGS.
- the main part 132 of the terminal 130 is arranged so as to pass through the through hole 143 of the gasket 140, the through hole 161 of the insulating member 160, and the through hole 173 of the lead 170 shown in FIGS.
- a part of the reduced diameter portion 133 of the terminal 130 is in contact with the inner peripheral surface of the through hole 143 of the gasket 140.
- the tip 134 of the main portion 132 of the terminal 130 that has passed through the through hole 173 of the lead 170 is caulked and fixed to the terminal connection portion 172 of the lead 170, so A caulking portion 134 as an end portion is formed.
- a portion 142 ⁇ / b> A of the shaft portion 142 of the gasket 140 is formed between the tapered portion 122 ⁇ / b> R of the sealing body 120 and the reduced diameter portion 133 of the terminal 130. It is sandwiched between. Further, since the second end portion 134 of the terminal 130 passes through the through hole 173 penetrating the terminal connection portion 172 facing the second surface 120B of the sealing body 120, the second surface of the sealing body 120. Projects from 120B.
- the restraining ring 150 included in the sealing body unit 10 of the first example is hung on the outer periphery of the rising portion 123 of the sealing body 120.
- the constraining ring 150 includes a portion 142 A of the shaft portion 142 of the gasket 140 and a tapered portion 122 R of the sealing body 120 between the constraining ring 150 and the reduced diameter portion 133 of the terminal 130. It is arranged to be located.
- the main portion 132 of the terminal 130 includes the reduced diameter portion 133 having a tapered surface.
- the tapered surface of the reduced diameter portion 133 is inclined by an inclination angle ⁇ 1 with respect to the axial direction X of the main portion 132 of the terminal 130.
- the sealing body 120 also includes the tapered portion 122R having a tapered surface.
- the tapered surface of the tapered portion 122 ⁇ / b> R of the sealing body 120 is inclined by the inclination angle ⁇ 2 with respect to the axial direction X of the main portion 132 of the terminal 130.
- the inclination angle ⁇ 2 of the tapered portion 122 R of the sealing body 120 is larger than the inclination angle ⁇ 1 of the reduced diameter portion 133 of the terminal 3. That is, the taper of the taper portion 122R is looser than the taper of the reduced diameter portion 133.
- the shaft portion 142 of the gasket 140 sandwiched between the reduced diameter portion 133 of the terminal 130 having the tapered surfaces with different inclination angles and the tapered portion 122R of the sealing body 120 will be described below with reference to FIG. As shown, a portion 142A that receives pressure from the reduced diameter portion 133 of the terminal 130 and the tapered portion 122R of the sealing body 120 is included.
- the shaft portion 142 of the gasket 140 is inserted into the through hole 122 of the sealing body 120 as shown in FIG. Since the through-hole 122 includes the tapered portion 122R described above, the inner peripheral surface of the through-hole 143 of the shaft portion 142 of the gasket 140 inserted into the through-hole 122 is the same as the tapered portion 122R of the through-hole 122. Includes a tapered surface reflecting the taper.
- the reduced diameter portion 133 of the terminal 130 is inserted into the through hole 143 of the gasket 140 such that a part thereof is in contact with the inner peripheral surface of the through hole 143 of the gasket 140. Therefore, the terminal 130 is designed such that the outer diameter of at least a part of the reduced diameter part 133 of the main part 132 is equal to or larger than the inner diameter of at least a part of the through hole 143 of the gasket 140.
- the inclination angle of the inner peripheral surface of the through hole 143 of the gasket 140 reflects the inclination angle ⁇ 2 of the tapered part 122R of the sealing body 120.
- the shaft portion 142 of the gasket 140 has an inner diameter P 2 of the through hole 143 that is at least part of the reduced diameter portion 133 of the terminal 130. A portion smaller than the outer diameter P 1 is included.
- the inner diameter of the through hole 143 of the gasket 140 is larger than the outer diameter of the reduced diameter portion 133 of the terminal 130 in the shaft portion 142 of the gasket 140.
- a small portion receives pressure from the reduced diameter portion 133 of the terminal 130.
- this portion of the shaft portion 142 of the gasket 140 receives pressure from the tapered portion 122 ⁇ / b> R of the sealing body 120.
- the portion of the shaft portion 142 of the gasket 140 that receives pressure from the reduced diameter portion 133 of the terminal 130 generates a restraining force from the restraining ring 150 as a reaction of pressure originating from the reduced diameter portion 133. This is received through the tapered portion 122R.
- the sealing body unit 10 of the first example shown in FIGS. 13 to 17 is formed between the reduced diameter portion 133 of the terminal 130 and the shaft portion 142 of the gasket 140, and between the tapered portion 122R of the sealing body 120 and the gasket 140. High adhesion can be achieved with the shaft 142, and consequently high sealing performance can be achieved.
- the shaft portion 142 of the gasket 140 is sandwiched between the tapered portion 122 ⁇ / b> R of the sealing body 120 and the reduced diameter portion 133 of the terminal 130.
- the portion includes a first portion 142 1 having a maximum thickness T 1 and a second portion 142 2 having a minimum thickness T 2 .
- the first portion 142 1 corresponds to a root portion of the flange portion 141 side of the shaft portion 142 of the gasket 140.
- the second portion 142 2 corresponds to the end portion of the shaft portion 142 that is close to the tip end 123E of the rising portion 123.
- the first portion 142 1 is more edged than the second portion 142 2 in the through hole of the terminal connecting portion 121 (not shown in FIG. 17 but indicated by reference numeral 22 in FIG. 14). It is arranged near the portion 122E. In other words, the second portion 142 2 is disposed closer to the tip 123E of the rising portion 123 of the sealing body 120 than the first portion 142 1 is. It 2 second portion 142 is smaller in thickness than the first portion 142 1, 2 the second portion 142 is under pressure from the reduced diameter portion 133 of the tapered portion 122R and the terminal 130 of the sealing member 120 compressed Means that
- the sealing body unit 10 of the first example shown in FIGS. 13 to 17 can achieve high sealing performance at the two terminals 130.
- the sealing body unit 10 of the first example shown in FIGS. 13 to 17 can be used as a sealing body of a nonaqueous electrolyte battery, for example. Since the sealing body unit 10 of the first example can exhibit high sealing performance, when incorporated in a non-aqueous electrolyte battery, leakage of the non-aqueous electrolyte and intrusion of moisture can be prevented. In particular, for example, when the sealing body unit 10 of the first example is used as a sealing body of a nonaqueous electrolyte battery with the second surface 120B of the sealing body 120 facing the inside of the battery, the sealing body 120 rises as the rising portion 123.
- the sealing body unit 10 of the first example can realize a nonaqueous electrolyte battery that can prevent problems such as battery performance degradation.
- the leading end 123E of the rising portion 123 protrudes from the second surface 120B of the sealing body 120 as shown in FIGS. Yes.
- the rising portion 123 of the terminal connection part 121 of the sealing body 120 increases the pressure inside the battery.
- the terminal 130 surrounded by them can be deformed so as to be tightened. That is, the battery including the sealing body unit 10 of the first example can maintain high sealing performance even when the internal pressure of the battery increases.
- the sealing unit 10 of the first example can easily control the distance between the terminal 130 and the sealing body 120, that is, the space in which the gasket 140 is inserted.
- FIG. 19 is a schematic perspective view of a sealing body unit of a second example according to the second embodiment.
- FIG. 20 is a schematic exploded perspective view of the sealing body unit shown in FIG.
- FIG. 21 is a schematic cross-sectional view taken along line IX-IX ′ of the sealing body unit shown in FIG.
- a sealing body unit 10 shown in FIGS. 19 to 21 includes a sealing body 120 shown in FIGS. 19 to 21, two terminals 130 shown in FIGS. 19 to 21, two gaskets 140 shown in FIGS. And two insulating members 160 shown in FIG. 21 and two leads 170 shown in FIGS.
- the sealing body 120 and the gasket 140 have the same structure as those of the sealing body unit 10 of the first example described with reference to FIGS. Therefore, these descriptions are omitted here.
- the lead 170 includes two electrode connection portions 171 and a terminal connection portion 172 as shown in FIG.
- the electrode connecting portion 171 has a belt-like planar shape.
- the terminal connection portion 172 is a plate shape having a strip-like planar shape, and a rod-like connection protrusion 174 is provided on the main surface.
- the terminal connection portion 172 is further provided with a restraining protrusion 175 on its main surface.
- the restraining protrusion 175 has an annular planar shape, and this ring is a ring centering on the connection protrusion 174.
- the flange portion 141 of the gasket 140 is the terminal connection portion of the sealing body 12. It is mounted on the bottom of the recesses 124A and 124B of 121. Further, as shown in FIG. 21, the shaft portion 142 of the gasket 140 is inserted into the through hole 122 of the sealing body 120. Therefore, the tapered surface of the tapered portion 122R of the sealing body 120 is reflected on the inner peripheral surface of the through hole 143 of the shaft portion 142 of the gasket 140, as shown in FIG.
- the leading end 123E of the rising portion 123 of the sealing body 120 and the leading end 142E of the shaft portion 142 of the gasket 140 are disposed so as to face the lead 170 with the insulating ring 160 interposed therebetween. Yes. Further, as shown in FIG. 21, the rising portion 123 of the sealing body 120 is opposed to the restraining protrusion 175 of the lead 170 with the insulating ring 160 interposed therebetween. As shown in FIG. 21, the leading end 123E of the rising portion 123 of the sealing body 120 and the leading end 142E of the shaft portion 142 of the gasket 140 are disposed so as to face the lead 170 with the insulating ring 160 interposed therebetween. Yes. Further, as shown in FIG. 21, the rising portion 123 of the sealing body 120 is opposed to the restraining protrusion 175 of the lead 170 with the insulating ring 160 interposed therebetween. As shown in FIG.
- the insulating ring 160 is sandwiched between the rising portion 123 of the sealing body 120 and the restraining protrusion 175 of the lead 170, so that the portion that contacts the tapered portion 122 ⁇ / b> R of the sealing body 120 is the tapered portion 122 ⁇ / b> R.
- the portion of the lead 170 in contact with the restraining protrusion 175 is deformed to reflect the surface shape of the restraining protrusion 175.
- the terminal 130 shown in FIGS. 19 to 21 has a through-hole 135 starting from the main surface 131A of the flange portion 131 and reaching the tip 132A of the main portion 132, as shown in FIGS. Different from the terminal 130 shown in FIG.
- This terminal 130 corresponds to the positive electrode terminal 9 of the battery 100 ′ described with reference to FIGS. 6 to 8.
- the main portion 132 of the terminal 130 corresponds to the terminal shaft portion 92 of the positive electrode terminal 9 in the battery 100 ′ described with reference to FIGS. 6 to 8.
- the flange portion 131 of the terminal 130 is placed on the flange portion 141 of the gasket 140. Further, as shown in FIG. 21, the main portion 132 of the terminal 130 passes through the through hole 143 of the gasket 140, and the tip 132 ⁇ / b> A is in contact with the terminal connection portion 172 of the lead 170. Further, the connection protrusion 174 of the lead 170 is fitted in the through hole 135 of the terminal 130. The end portion of the connection protrusion 174 of the lead 170 is welded to the main surface 131 ⁇ / b> A of the flange portion 131 of the terminal 130.
- a part of the reduced diameter portion 133 of the terminal 130 is surrounded by the shaft portion 142 of the gasket 140, and the outside is surrounded by the rising portion 123 of the sealing body 120. It is further surrounded.
- the rising portion 123 surrounding the reduced diameter portion 133 of the terminal 130 and the shaft portion 142 of the gasket 140 is further restrained by a restraining protrusion 175 provided on the lead 170. That is, in the sealing body unit 10 of the second example, the lead 170 can exhibit the same restraining function as the restraining ring 150 included in the sealing body unit 10 of the first example.
- the main portion 132 of the terminal 130 includes the reduced diameter portion 133 having a tapered surface.
- the tapered surface is inclined by an inclination angle ⁇ 1 with respect to the axial direction X of the main portion 132 of the terminal 130.
- the sealing body 120 also includes the tapered portion 122R having a tapered surface.
- the tapered surface is inclined by an inclination angle ⁇ 2 with respect to the axial direction X of the main portion 132 of the terminal 130.
- the inclination angle ⁇ 2 of the tapered portion 122 R of the sealing body 120 is larger than the inclination angle ⁇ 1 of the reduced diameter portion 133 of the terminal 130. That is, the taper portion 122 ⁇ / b> R of the sealing body 120 is looser than the taper of the reduced diameter portion 133 of the terminal 130.
- the shaft portion 142 of the gasket 140 sandwiched between the reduced diameter portion 133 of the terminal 130 having the tapered surfaces with different inclination angles and the tapered portion 122R of the sealing body is the same as that of the sealing body unit 10 of the first example. For the same reason as described, it includes a portion 142A that receives pressure from the reduced diameter portion 133 of the terminal 130 and the tapered portion 122R of the sealing body 120. Further, the shaft portion 142 of the gasket 140 in the sealing body unit 10 of the second example has an end extending from the reduced diameter portion 133 of the terminal 130 in the same manner as the shaft portion 142 of the gasket 140 in the sealing body unit 10 of the first example.
- the sealing body unit 10 of the second example can achieve high sealing performance for the same reason as the sealing body unit 10 of the first example.
- the leading end 123E of the rising portion 123 protrudes from the second surface 120B of the sealing body 120 as shown in FIG.
- the rising portion 123 of the terminal connection part 121 of the sealing body 120 increases the pressure inside the battery.
- the terminal 130 surrounded by them can be deformed so as to be tightened. That is, the battery including the sealing body unit 10 of the second example can maintain high sealing performance even when the internal pressure of the battery increases.
- the other terminal 130 included in the sealing body unit 10 of the second example shown in FIGS. 19 to 21 has the same structure as the terminal 130 described above. And having an arrangement. Therefore, the sealing body unit 10 of the second example shown in FIGS. 19 to 21 can achieve high sealing performance at the two terminals 130.
- the sealing body unit 10 of the second example it is easy to control the distance between the terminal 130 and the sealing body 120, that is, the space in which the gasket 140 is inserted.
- the gasket 140 of the sealing body unit 10 of the first example or the second example can be changed to the gasket 4 including the concave portion 41B as shown in FIG.
- the terminal 130 can also be changed to the external terminal 5 in which the flange portion 51 includes the protrusion 51D as shown in FIG.
- the terminal 130 of the sealing body unit 10 of the 1st example or the 2nd example can also be changed into the external terminal 5 in which the reduced diameter part 53 contains the step part 53B as shown in FIG.11 and FIG.12. .
- the reduced diameter part 53 contains the step part 53B as shown in FIG.11 and FIG.12. .
- FIG. 22 is a diagram illustrating an example of a manufacturing process of a terminal connection portion of a sealing body that can be included in the sealing body unit according to the second embodiment.
- the sealing body 120 that can be manufactured by the manufacturing process described with reference to FIG. 22 is, for example, a sealing body that is formed of a laminate of a metal, an alloy, or a resin layer and a metal layer and / or an alloy layer.
- a plate material 120 is prepared as a material for a sealing body.
- the plate member 120 has a first surface 120A and a second surface 120B. The distance between the first surface 120A and the second surface 120B is the thickness of the plate 120.
- a discard hole 124C is formed in the plate member 120 so as to penetrate from the first surface 120A to the second surface 120B.
- the first surface 120A of the plate member 120 is pressed to form a recess 124A having a bottom area smaller than the area of the first surface 120A of the plate member 120.
- the peripheral edge 120R at the bottom of the recess 124A has a curved surface as shown in FIG.
- the first surface 120A of the plate member 120 includes the bottom of the recess 124A.
- the plate member 120 swells toward the shaft of the discard hole 124C and swells outward from the edge 120E as much as the volume of the recess 124A.
- the first surface 120A of the plate member 120 is pressed to form a recess 124B having a bottom area smaller than the recess 124A at the bottom of the recess 124A.
- the first surface 120A of the plate member 120 includes the bottom of the recess 124B.
- the plate member 120 swells toward the shaft of the discard hole 124C and swells outward from the edge portion 120E as much as the volume of the recess 124B.
- the discard hole 124 ⁇ / b> C is closed by the process of FIG.
- the distance t from the bottom of the recess 124B of the plate member 120 to the second surface 120B is 0.3 mm or less.
- a through-hole 122 that penetrates from the bottom of the recess 124B of the plate member 120, that is, from a part of the first surface 120A of the plate member 120 to reach the second surface 120B is provided.
- a rising portion 123 extending downward from the edge 122E of the through hole 122 is provided.
- the rising portion 123 includes a tip 123E that protrudes from the second surface 120B of the plate member 120.
- the through hole 122 penetrates from the first surface 120 ⁇ / b> A of the plate member 120 to the tip of the rising portion 123.
- the through hole 122 includes a tapered portion 122R whose diameter decreases as the tip 123E of the rising portion 123 is approached.
- Such through-holes 122 and rising parts 123 can be formed by burring, for example.
- the concave portion 124A having the curved peripheral edge portion 120R is provided in the step shown in FIG. 22C. Further, as described with reference to FIGS. 22C and 22D, the two-stage recesses 124A and 124B are formed. With these devices, the terminal connection portion 121 having a thin thickness as shown in FIG. 22F, specifically a thickness of 0.3 mm or less, can be formed while preventing the sealing body 120 from cracking or twisting. .
- the sealing body of an example which the sealing body unit which concerns on 2nd Embodiment can comprise is obtained by carrying out injection molding using the target type
- a sealing body unit is provided.
- this sealing body unit at least a part of the gasket is sandwiched between the taper portion of the sealing body and the reduced diameter portion of the terminal.
- the inclination angle of the tapered portion is larger than the inclination angle of the reduced diameter portion. Thanks to that, the sealing body unit according to the second embodiment can achieve high adhesion between the reduced diameter portion of the terminal and the gasket, and between the tapered portion of the sealing body and the gasket, As a result, high sealing performance can be exhibited.
- a battery is provided.
- This battery includes an exterior body, an electrode body, and a sealing body unit according to the second embodiment.
- the exterior body has an opening.
- the electrode body is accommodated in the exterior body.
- the sealing body unit seals the opening of the exterior body.
- the second surface of the sealing body included in the sealing body unit faces the electrode body.
- the battery according to the third embodiment may be a primary battery or a secondary battery.
- An example of the battery according to the third embodiment is a lithium ion secondary battery.
- the battery according to the third embodiment includes an exterior body having an opening.
- An electrode body is accommodated in the exterior body.
- the electrode body can include a positive electrode and a negative electrode.
- the positive electrode can include, for example, a positive electrode current collector, a positive electrode material layer formed thereon, and a positive electrode current collector tab.
- the negative electrode can include, for example, a negative electrode current collector, a negative electrode material layer formed thereon, and a negative electrode current collector tab.
- the positive electrode material layer can include, for example, a positive electrode active material, a conductive agent, and a binder.
- the negative electrode material layer can include, for example, a negative electrode active material, a conductive agent, and a binder.
- the positive electrode material layer and the negative electrode material layer may be disposed to face each other.
- the electrode body may further include a separator disposed between the positive electrode material layer and the negative electrode material layer facing each other.
- the structure of the electrode body is not particularly limited.
- the electrode body can have a stack structure.
- the stack structure has a structure in which the positive electrode and the negative electrode described above are stacked with a separator interposed therebetween.
- the electrode body can have a wound structure.
- the wound structure is a structure in which the positive electrode and the negative electrode described above are stacked with a separator interposed therebetween, and the stacked body thus obtained is wound in a spiral shape.
- the battery according to the third embodiment further includes a sealing body unit according to the second embodiment.
- the sealing body unit seals the opening of the exterior body so that the second surface of the sealing body faces the electrode body.
- the sealing body unit according to the second embodiment can exhibit high sealing performance as described above. Thanks to this, the non-aqueous electrolyte secondary battery included in the third embodiment can prevent, for example, moisture from entering the battery and leakage of the non-aqueous electrolyte. Can be prevented.
- the terminal of the sealing body unit according to the second embodiment is electrically connected to the electrode body through, for example, a lead.
- the sealing body unit according to the second embodiment can include, for example, two terminals, and one terminal can be connected to the positive electrode of the electrode body, and the other terminal can be connected to the negative electrode of the electrode body.
- the sealing of the opening of the exterior body by the sealing body unit can be performed, for example, by welding the peripheral edge of the opening and the portion of the sealing body that is in contact with the peripheral edge.
- the battery according to the third embodiment is a non-aqueous electrolyte battery, it can further include a non-aqueous electrolyte.
- the exterior body can further contain a nonaqueous electrolyte.
- the positive electrode, the negative electrode, the separator, and the electrolytic solution that can be used in the nonaqueous electrolyte battery that is an example of the battery according to the third embodiment, for example, those materials mentioned in the description of the first embodiment are used. Can be used.
- the outer package is preferably formed of a material having corrosion resistance.
- the exterior body is preferably formed of the same material as the sealing body included in the sealing body unit according to the first embodiment.
- the wall thickness of the exterior body can be set independently of the thickness of the sealing body, for example, according to the strength required by the battery.
- sealing body and the exterior body can also constitute one exterior member. That is, the sealing body and the exterior body can constitute an exterior member similar to the exterior member included in the battery according to the first embodiment.
- FIG. 23 is a schematic exploded perspective view of an example battery according to the third embodiment.
- a battery 1000 shown in FIG. 23 includes a sealing body unit 10, an electrode body 180, and an exterior body 190.
- the sealing body unit 10 is an example of the sealing body unit 10 according to the second embodiment described with reference to FIGS. 13 to 18. Therefore, the description about the sealing body unit 10 is abbreviate
- the electrode body 180 shown in FIG. 23 includes a positive electrode, a negative electrode, and a separator.
- the positive electrode includes a strip-shaped positive electrode current collector, a positive electrode material layer formed thereon, and a positive electrode current collector tab.
- the negative electrode includes a strip-shaped negative electrode current collector, a negative electrode material layer formed thereon, and a negative electrode current collector tab.
- the electrode body 180 is composed of a positive electrode, a negative electrode, and a separator, which are stacked so that the positive electrode material layer and the negative electrode material layer are disposed to face each other with a separator interposed therebetween, and the laminate thus obtained is wound. Obtained by. During the production of the laminate, the positions of the positive electrode and the negative electrode are adjusted so that the positive electrode current collector tab and the negative electrode current collector tab extend in opposite directions from the wound laminate.
- the electrode body 180 includes a sandwiching portion 181 that sandwiches a positive electrode current collector tab that extends from a wound laminate, a sandwiching portion 182 that sandwiches a negative electrode current collector tab that extends from a wound laminate, And an insulating seal 183 that covers the rotated laminate other than the positive electrode current collecting tab and the negative electrode current collecting tab.
- the electrode body 180 is opposed to the second surface 120B of the sealing body 120 of the sealing body unit 10, as shown in FIG.
- the clamping part 181 of the electrode body 180 is laser welded to the electrode connecting part 171 of one lead 170 of the sealing body unit 10 while being sandwiched between them.
- the clamping part 182 of the electrode body 180 is laser welded to the electrode connecting part 171 of the other lead 170 of the sealing body unit 10 while being sandwiched between them.
- the electrode body 180 is electrically connected to the terminal 130 of the sealing body unit 10.
- the exterior body 190 shown in FIG. 23 is a bottomed square exterior body.
- the exterior body 190 has an opening 191 at one end.
- the exterior body 190 accommodates the electrode body 180 and the two leads 170. Although not shown, the exterior body 190 further contains a nonaqueous electrolyte.
- insulating members 192 shown in FIG. 23 are disposed between the inner wall of the exterior body 190 and the sandwiched portion 181 of the lead 170 and the electrode body 180 that are laser-welded to each other. Thus, electrical insulation between the electrode body 180 and the exterior body 190 is ensured.
- FIG. 23 Although an exploded view is shown in FIG. 23, the peripheral edge portion of the opening 191 of the exterior body 190 is laser-welded to a portion of the sealing body 120 facing the opening. Thus, the opening 191 of the exterior body 190 is sealed by the sealing body unit 10.
- a battery is provided.
- This battery includes the sealing body unit according to the first embodiment.
- This sealing body unit seals the opening of the exterior body. Thanks to this, the battery according to the third embodiment can achieve excellent sealing performance.
- Example 1 In Example 1, a battery unit 100 having the same structure as the battery 100 shown in FIGS. 1 to 4 was produced except that the electrode body 1 and the nonaqueous electrolyte were not accommodated.
- the exterior body 31 and the sealing plate 32 were formed using a stainless steel plate having a thickness of 0.1 mm.
- an aluminum alloy was used as the lead 2, the positive electrode terminal 5, and the negative electrode terminal 5 ', and a stainless steel material was used as a material for the restraining ring.
- the positive electrode terminal 5 and the negative electrode terminal 5 ′ on the exterior body 31 side were sealed. Subsequently, He pressurized to a gauge pressure of 0.1 MPa was sprayed from the positive electrode lead 2 and the negative electrode lead side for 1 second, and the amount of He leakage after 30 seconds was detected (vacuum inspection method).
- the battery unit 100 of Example 1 had a He leakage amount of 1.0 ⁇ 10 ⁇ 11 Pa ⁇ m 3 / s.
- the inclination angle ⁇ 1 of the terminal shaft portion 52 of the positive electrode terminal 5 of the battery unit 100 of Example 1 was 5 °.
- the inclination angle ⁇ 2 of the rising portion 37 of the exterior member 3 of the battery unit 100 of Example 1 was 10 °.
- the inclination angle of the terminal shaft portion of the negative electrode terminal 5 ′ was the same as the inclination angle ⁇ 1 of the terminal shaft portion 52 of the positive electrode terminal 5.
- Example 2 A battery unit 100 was produced in the same manner as in Example 1 except that the inclination angle of the rising portion 37 of the exterior member 3 was increased and the taper of the reduced diameter portion 39 of the rising portion 37 was loosened.
- Example 1 A battery unit was produced in the same manner as in Example 1 except that the reduced diameter portion was not provided in the rising portion 37 of the exterior member 3 and the reduced diameter portion was not provided in the positive electrode terminal 5 and the negative electrode terminal 5 ′. .
- Example 2 and Comparative Example 1 and Comparative Example 2 were also tested in the same manner as in Example 1. The results of these tests are shown in Table 1 below together with the results of the test of Example 1.
- the battery unit 100 of Example 2 exhibited He leak prevention characteristics superior to the battery unit 100 of Example 1. This is because the difference between the inclination angle ⁇ 1 of the terminal shaft portion 52 of the positive electrode terminal 5 and the inclination angle ⁇ 2 of the rising portion 37 and the inclination angle ⁇ 1 of the terminal shaft portion of the negative electrode terminal 5 ′ and the rising portion 37 in Example 2.
- the reduced diameter portion 53 of the terminal shaft portion 52 of the positive electrode terminal 5 and the shaft portion 42 of the gasket 4 Higher adhesion can be achieved between the reduced diameter portion of the terminal shaft portion and the shaft portion 42 of the gasket 4, and between the reduced diameter portion 39 of the rising portion 37 and the shaft portion 42 of the gasket 4, As a result, it is considered that a higher sealing performance could be achieved.
- the terminal shaft portion 52 of the positive electrode terminal 5 and the terminal shaft portion of the negative electrode terminal 5 ′ had no reduced diameter portion, and the rising portion 37 also had no reduced diameter portion. It is considered that the adhesion between the gasket 4 and between the rising portion 37 and the gasket 4 was low.
- Example 3 In Example 3, a battery unit 1000 having the same structure as the battery 1000 shown in FIG. 23 was produced except that the electrode body 180 and the nonaqueous electrolyte were not accommodated.
- the exterior body 190 was formed using an aluminum plate having a thickness of 0.5 mm.
- an aluminum plate having a thickness of 1.1 mm was used to form the terminal connection portion 121 having a thickness of 0.3 mm in the same manner as described with reference to FIG. .
- an aluminum alloy was used as the material of the terminal 130 and the lead 170.
- a stainless material was used as a material of the restraining ring 150.
- tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer (PFA) was used as a material for the gasket 140.
- the terminal 130 on the sealing body unit 10 side was sealed. Subsequently, He pressurized to a gauge pressure of 0.1 MPa was sprayed from the lead 7 side for 1 second, and the amount of He leakage after 30 seconds was detected (vacuum inspection method).
- the battery unit 1000 of Example 3 had a He leakage amount of 1.0 ⁇ 10 ⁇ 11 Pa ⁇ m 3 / s or less.
- the inclination angles ⁇ 1 of the reduced diameter portions 133 of the two terminals 130 of the battery unit 1000 of Example 3 were the same and 5 °.
- tilt angle (theta) 2 of two taper parts 122R of the sealing body 120 of the battery unit 1000 of Example 3 was mutually the same, and was 14 degrees.
- Example 4 A battery unit 1000 was produced in the same manner as in Example 3 except that the inclination angle of the taper portion 122R of the sealing body 120 was increased and the taper of the taper portion 122R was loosened to 20 °.
- Example 3 A battery unit was produced in the same manner as in Example 3 except that the sealing body 120 was not provided with a tapered portion.
- Example 4 For Example 4 and Comparative Example 3, the same test as in Example 3 was performed. The results of these tests are shown in Table 2 below together with the results of the test of Example 3.
- Example 5 As shown in FIG. 10, the gasket 4 including the recess 41 ⁇ / b> B is used, as shown in FIG. 10, the flange portion 51 uses the positive terminal 5 including the protrusion 51 ⁇ / b> D, and the negative terminal similar to the positive terminal 5.
- a battery unit 100 was produced in the same manner as in Example 1 except that 5 ′ was used.
- the height of the protrusion 51D from the mounting surface 51C of the flange portion 51 of the positive electrode terminal 5 was 0.5 mm. Moreover, the depth of the recessed part 41B of the gasket 4 was 0.1 mm.
- Example 6 Examples other than using the external terminal 5 in which the reduced diameter portion 53 has the stepped portion 53B and using the negative electrode terminal 5 ′ similar to the positive electrode terminal 5 as shown in FIGS. In the same manner as in Example 1, a battery unit 100 was produced.
- the ratio of the portion 55 having a smaller diameter to the length was 1: 1.
- the ratio of the diameter of the portion 55 to the diameter of the stepped portion 53B of the reduced diameter portion 53 was 1.1.
- Examples 5 and 6 were also tested in the same manner as in Example 1.
- the amount of He leakage was 1 ⁇ 10 ⁇ 11 Pa ⁇ m 3 / s or less.
- the battery unit 100 of Example 6 had a He leakage amount of 1 ⁇ 10 ⁇ 11 Pa ⁇ m 3 / s or less.
- the restraining member restrains at least a part of the reduced diameter portion of the terminal shaft portion via the reduced diameter portion of the rising portion and the shaft portion of the gasket. is doing.
- the inclination angle of the rising portion is larger than the inclination angle of the terminal shaft portion.
- this battery can be provided with a terminal structure capable of exhibiting high sealing performance in a terminal connection portion having a small thickness.
- sealing body 120A ... first 120B ... second surface 121 ... terminal connection portion 122 ... through hole 122R ... te Par part, 122E ... Edge of through hole, 123 ... Rising part, 123E ... Tip of rising part, 124A ... Recessed part, 124B ... Recessed part, 124C ... Disposal hole, 125 ... Safety valve, 126 ... Injection port, 130 ... Terminal, 131: Flange portion, 131A: Main surface of the flange portion, 132: Main portion, 133 ... Reduced diameter portion, 134 ... Caulking portion, 135 ... Through hole, 140 ... Gasket, 141 ... Flange portion, 142 ...
- Shaft portion, 142E Tip of the shaft portion of the gasket, 142 1 ... 1st part, 142 2 ... 2nd part, 143 ... through hole, 150 ... restraining member (ring), 160 ... insulating member, 161 ... through hole, 170 ... lead, 171: Electrode connection portion, 172 ... Terminal connection portion, 173 ... Through hole, 174 ... Connection projection, 175 ... Restraint projection, 180 ... Electrode body, 181 ... Clamping portion, 182 ... Clamping portion, 183 Insulating seals, 190 ... outer body, 191 ... opening, 192 ... insulator, 1000 ... battery.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
Description
第1の実施形態によると、電池が提供される。この電池は、電極体と、この電極体に電気的に接続されたリードと、電極体及びリードを収容した外装部材と、ガスケットと、外部端子と、拘束部材とを具備する。外装部材は、厚さが0.3mm以下の端子接続部を備える。端子接続部は、貫通孔と、この貫通孔の縁部から外装部材内に向けて延びた立ち上がり部とを有する。立ち上がり部は、貫通孔の縁部から外装部材内に向かう方向に沿って縮径した縮径部を含んでいる。ガスケットは、中空の軸部を有する。ガスケットの中空の軸部は、立ち上がり部に挿入されている。外部端子は、第1の端部及び第2の端部を有し、第1の端部から第2の端部に向かう軸方向に延びた端子軸部を備える。端子軸部は、ガスケットの軸部を通り抜け、リードに電気的に接続されている。端子軸部は、その軸方向に沿って縮径した縮径部を含んでいる。拘束部材は、端子軸部の縮径部の少なくとも一部を立ち上がり部の縮径部及びガスケットの軸部を介して拘束している。立ち上がり部の縮径部の端子軸部の軸方向に対する傾斜角は、端子軸部の縮径部の端子軸部の軸方向に対する傾斜角よりも大きい。
例えば、リードに貫通孔を更に設け、この貫通孔に外部端子の端子軸部を嵌め込むことによって、外部端子とリードとを接続することができる。
或いは、外部端子に貫通孔を更に設けると共にリードに突起部を更に設け、このリードの突起部を外部端子の貫通孔に嵌め込むことによっても、外部端子とリードとを接続することができる。
また、外部端子とリードとは、かしめ固定されていてもよいし、又はレーザー溶接されていてもよい。
正極活物質としては、例えば、酸化物又は硫化物を用いることができる。酸化物及び硫化物の例には、リチウムを吸蔵する二酸化マンガン(MnO2)、酸化鉄、酸化銅、酸化ニッケル、リチウムマンガン複合酸化物(例えばLixMn2O4またはLixMnO2)、リチウムニッケル複合酸化物(例えばLixNiO2)、リチウムコバルト複合酸化物(例えばLixCoO2)、リチウムニッケルコバルト複合酸化物(例えばLiNi1-yCoyO2)、リチウムマンガンコバルト複合酸化物(例えばLixMnyCo1-yO2)、スピネル構造を有するリチウムマンガンニッケル複合酸化物(例えばLixMn2-yNiyO4)、オリビン構造を有するリチウムリン酸化物(例えばLixFePO4、LixFe1-yMnyPO4、LixCoPO4)、硫酸鉄(Fe2(SO4)3)、バナジウム酸化物(例えばV2O5)及び、リチウムニッケルコバルトマンガン複合酸化物が挙げられる。上記の式において、0<x≦1であり、0<y≦1である。活物質として、これらの化合物を単独で用いてもよく、或いは、複数の化合物を組合せて用いてもよい。
負極活物質としては、例えば、リチウムイオンを吸蔵及び放出することができる、金属酸化物、金属窒化物、合金、炭素等を用いることができる。0.4V以上(対Li/Li+)貴な電位でリチウムイオンの吸蔵及び放出が可能な物質を負極活物質として用いることが好ましい。
セパレータは、例えば、ポリエチレン、ポリプロピレン、セルロース、またはポリフッ化ビニリデン(PVdF)を含む多孔質フィルム、または、合成樹脂製不織布から形成されてよい。中でも、ポリエチレン又はポリプロピレンから形成された多孔質フィルムは、一定温度において溶融し、電流を遮断することが可能であるため、安全性を向上できる。
電解液としては、例えば、非水電解質を用いることができる。
リードの材料としては、例えば、アルミニウム材又はアルミニウム合金材を用いることができる。接触抵抗を低減するために、リードの材料は、リードに電気的に接続し得る正極集電体又は負極集電体の材料と同じであることが好ましい。
外装部材は、耐食性を有する材料で形成されることが好ましい。外装部材は、先に説明したように、金属、合金又は樹脂層と金属層及び/又は合金層との積層体で形成することができる。
ガスケットを形成することができる材料としては、例えば、フッ素樹脂、フッ素ゴム、ポリフェニレンサルファイド樹脂(PPS樹脂)、ポリエーテルエーテルケトン樹脂(PEEK樹脂)、ポリプロピレン樹脂(PP樹脂)、及びポリブチレンテレフタレート樹脂(PBT樹脂)などの樹脂が挙げられる。
外部端子の材料としては、例えば、リードと同じ材料を用いることができる。
拘束部材の材料としては、例えば、アルミニウム、アルミニウム合金又はステンレス鋼材を用いることができる。
絶縁部材の材料としては、例えば、テトラフルオロエチレン・パーフルオロアルキルビニルエーテル共重合体(PFA)、ポリプロピレン(PP)、ポリエチレン(PE)、ナイロン、ポリブチレンテレフタラート(PBT)、ポリエチレンテレフタラート(PET)、ポリテトラフロロエチレン(PTFE)、ポリフェニレンサルファイド(PPS)、及びポリエーテルエーテルケトン(PEEK)等の熱可塑性樹脂を用いることができる。
第1の実施形態に係る電池は、上に説明した以外の部材を具備することもできる。例えば、第1の実施形態に係る電池は、正極集電タブ又は負極集電タブを束ねるための挟持部材を具備することができる。この挟持部材は、例えば、束ねる正極集電タブ又は負極集電タブ、すなわち正極集電体又は負極集電体と同じ材料で形成することができる。
図10に示す第3の例の電池100は、非水電解質電池である。図10に示す第3の例の電池100は、図示していない電極体と、2つのリード2(一方は図示していない)と、外装部材3と、ガスケット4と、2つの外部端子5(一方は図示していない)と、拘束リング6と、絶縁シート7とを具備している。
第2の実施形態によると、封口体ユニットが提供される。この封口体ユニットは、封口体と、ガスケットと、端子とを具備している。封口体は、第1の面と、その裏面としての第2の面とを有する。また、封口体は、第2の面から突出した先端を含む立ち上がり部と、この封口体を第1の面から立ち上がり部の先端まで貫通した貫通孔とを含む。貫通孔は、立ち上がり部の先端に近づくにつれて径が減少したテーパー部を含む。ガスケットは、貫通孔を含む。端子は、第1の端部及び第2の端部を有する。端子は、第1の端部から第2の端部に向かう軸方向に延びた主部を備える。主部は、第1の端部と第2の端部との間に、第2の端部に近づくにつれて径が減少した縮径部を含む。ガスケットの少なくとも一部は、封口体の貫通孔のテーパー部内に位置している。端子の縮径部の少なくとも一部は、ガスケットの貫通孔内に位置している。ガスケットのうち封口体の貫通孔のテーパー部内に位置している少なくとも一部は、封口体のテーパー部と、端子の縮径部との間に挟まれている。端子の主部の軸方向に対する封口体のテーパー部の傾斜角は、軸方向に対する縮径部の傾斜角よりも大きい。
例えば、リードに貫通孔を更に設け、この貫通孔に端子の主部を嵌め込むことによって、端子とリードとを接続することができる。
或いは、端子に凹部又は貫通孔を更に設けると共に封口体の第2の面に向き合ったリードの面に突起部を更に設け、このリードの突起部を端子の凹部又は貫通孔に嵌め込むことによっても、端子とリードとを接続することができる。凹部は、例えば、端子の主部の第2の端部に設けることができる。貫通孔は、例えば、端子の主部の第1の端部から第2の端部まで貫通することができる。
例えば、第1の例又は第2の例の封口体ユニット10のガスケット140を、図10に示すような凹部41Bを含むガスケット4に変更することもできる。この場合、端子130も、図10に示すような、フランジ部51が突起51Dを含む外部端子5に変更することもできる。このようなガスケット4及び外部端子5を用いると、先に説明した理由により、より優れた密封性を達成することができる。
第3の実施形態によると、電池が提供される。この電池は、外装体と、電極体と、第2の実施形態に係る封口体ユニットとを具備する。外装体は開口を有する。電極体は、外装体内に収容されている。封口体ユニットは、外装体の開口を封止している。封口体ユニットが含む封口体の第2の面が電極体と向き合っている。
図23に示す電池1000は、封口体ユニット10と、電極体180と、外装体190とを具備する。封口体ユニット10は、図13~図18を参照しながら説明した第2の実施形態に係る一例の封口体ユニット10である。そのため、封口体ユニット10についての説明は、ここでは省略する。
以下に例を挙げ、本発明を更に詳しく説明するが、発明の主旨を超えない限り本発明は以下に掲載される実施例に限定されるものでない。
実施例1では、電極体1及び非水電解質を収容していない点を除いて図1~図4に示した電池100と同じ構造を有する電池ユニット100を作製した。
(1)Heリーク試験
作製した電池ユニット100に対して、以下の手順でHeリーク試験を行った。
実施例1の電池ユニット100における、正極端子5及び負極端子5’の端子軸部52の縮径部53の傾斜角θ1、並びに外装部材3の立ち上がり部37の縮径部39の傾斜角θ2を、先に説明した手順で測定した。
実施例1の電池ユニット100における、ガスケット4の軸部42の厚みを先に説明した方法により測定した。測定した結果から、ガスケット4の軸部42のうち図4に示す第2の部分422の厚みT2は第1の部分421の厚みT1よりも小さいことが分かった。
外装部材3の立ち上がり部37の傾斜角を大きくして、立ち上がり部37の縮径部39のテーパーを緩くしたこと以外、実施例1と同様にして電池ユニット100を作製した。
外装部材3の立ち上がり部37に縮径部を設けなかったこと、及び正極端子5と負極端子5’とに縮径部を設けなかったこと以外、実施例1と同様にして電池ユニットを作製した。
外装部材3の立ち上がり部37に縮径部を設けなかったこと以外、実施例1と同様にして電池ユニットを作製した。
実施例3では、電極体180及び非水電解質を収容していない点を除いて図23に示した電池1000と同じ構造を有する電池ユニット1000を作製した。
(1)Heリーク試験
作製した電池ユニット1000に対して、以下の手順でHeリーク試験を行った。
実施例3の電池ユニット1000における、端子130の縮径部133の傾斜角θ1、並びに封口体120のテーパー部122Rの傾斜角θ2を、先に説明した手順で測定した。
実施例3の電池ユニット1000における、ガスケット140の軸部142の厚さを先に説明した方法により測定した。測定した結果から、ガスケット140の軸部142のうち図17に示す第2の部分1422の厚さT2は第1の部分1421の厚さT1よりも小さいことが分かった。
封口体120のテーパー部122Rの傾斜角を大きくして、テーパー部122Rのテーパーを20°へ緩くしたこと以外、実施例3と同様にして電池ユニット1000を作製した。
封口体120にテーパー部を設けなかったこと以外、実施例3と同様にして電池ユニットを作製した。
図10に示すような、凹部41Bを含むガスケット4を用いたこと、図10に示すような、フランジ部51が突起51Dを含む正極端子5を用いたこと、及び正極端子5と同様の負極端子5’を用いたこと以外、実施例1と同様にして電池ユニット100を作製した。
図11及び図12に示すような、縮径部53が段部53Bを有している外部端子5を用いたこと、及び正極端子5と同様の負極端子5’を用いたこと以外、実施例1と同様にして電池ユニット100を作製した。
実施例5及び6についても、実施例1と同様の試験を行った。実施例5の電池ユニット100は、He漏れ量が1×10-11Pa・m3/s以下であった。また、実施例6の電池ユニット100は、He漏れ量が1×10-11Pa・m3/s以下であった。
Claims (21)
- 電極体と、
前記電極体に電気的に接続されたリードと、
前記電極体及び前記リードを収容した外装部材であって、厚さが0.3mm以下の端子接続部を備え、前記端子接続部は、貫通孔と、前記貫通孔の縁部から前記外装部材内に向けて延びた立ち上がり部とを有し、前記立ち上がり部が前記貫通孔の縁部から前記外装部材内に向かう方向に沿って縮径した縮径部を含んでいる外装部材と、
前記立ち上がり部に挿入された中空の軸部を有するガスケットと、
第1の端部及び第2の端部を有し、前記第1の端部から前記第2の端部に向かう軸方向に延びた端子軸部を備え、前記端子軸部が前記ガスケットの前記軸部を通り抜け且つ前記リードに電気的に接続されており、前記端子軸部が前記軸方向に沿って縮径した縮径部を含んでいる外部端子と、
前記端子軸部の前記縮径部の少なくとも一部を前記立ち上がり部の前記縮径部及び前記ガスケットの前記軸部を介して拘束した拘束部材と
を具備し、
前記立ち上がり部の前記縮径部の前記軸方向に対する傾斜角は、前記端子軸部の前記縮径部の前記軸方向に対する傾斜角よりも大きいことを特徴とする電池。 - 前記ガスケットの前記軸部のうち前記立ち上がり部の前記縮径部と前記端子軸部の前記縮径部との間に挟まれた部分は、最大厚みを有する第1の部分と、最少厚みを有する第2の部分とを含み、前記第1の部分は、前記第2の部分よりも、前記端子接続部の前記貫通孔の前記縁部に近いところに配置されていることを特徴とする請求項1に記載の電池。
- 前記外装部材が、金属、合金、又は樹脂層と金属層及び/又は合金層との積層体で形成されていることを特徴とする請求項2に記載の電池。
- 前記リードには貫通孔が更に設けられており、前記外部端子の前記端子軸部は、前記リードの前記貫通孔に嵌め込まれていることを特徴とする請求項2に記載の電池。
- 前記外部端子には貫通孔が更に設けられており、前記リードには突起部が更に設けられており、前記リードの前記突起部は前記外部端子の前記貫通孔に嵌め込まれていることを特徴とする請求項2に記載の電池。
- 前記外部端子が前記リードにかしめ固定されていることを特徴とする請求項2に記載の電池。
- 前記外部端子と前記リードとがレーザー溶接されていることを特徴とする請求項2に記載の電池。
- 前記リードが前記拘束部材を兼ねていることを特徴とする請求項2に記載の電池。
- 前記ガスケットは、前記外装部材の前記端子接続部の表面に載置された部分を更に含み、前記ガスケットは、主面と、その裏面であって前記端子接続部の前記貫通孔の前記縁部に接した載置面とを含み、前記ガスケットの前記軸部は、前記ガスケットの前記載置面から前記外装部材内に延びており、
前記外部端子の前記第1の端部は、前記ガスケットの前記主面に載置された部分を含み、前記外部端子の前記部分は、端面とその裏面であって前記ガスケットの前記主面に接した載置面とを含み、
前記外部端子は、前記載置面から突出した突起を更に含み、
前記ガスケットは、前記主面に、前記外部端子の前記突起に対応した凹部を含み、
前記外部端子の前記突起が、前記ガスケットの前記凹部に嵌めこまれていることを特徴とする請求項2に記載の電池。 - 前記外部端子の前記縮径部は、周面に段部が設けられており、
前記縮径部の段部は、前記ガスケットの前記軸部の内面に接していることを特徴とする請求項1に記載の電池。 - 第1の面及びその裏面としての第2の面を有する封口体であって、前記第2の面から突出した先端を含む立ち上がり部と、前記封口体を前記第1の面から前記立ち上がり部の前記先端まで貫通した貫通孔とを含み、前記貫通孔が前記立ち上がり部の前記先端に近づくにつれて径が減少したテーパー部を含む封口体と、
貫通孔を含んだガスケットと、
第1の端部及び第2の端部を有した端子であって、前記第1の端部から前記第2の端部に向かう軸方向に延びた主部を備え、前記主部は、前記第1の端部と、前記第2の端部との間に、前記第2の端部に近づくにつれて径が減少した縮径部を含む端子と
を具備し、
前記ガスケットの少なくとも一部は、前記封口体の前記貫通孔の前記テーパー部内に位置しており、
前記端子の前記主部の前記縮径部の少なくとも一部は、前記ガスケットの前記貫通孔内に位置しており、
前記ガスケットの前記少なくとも一部は、前記封口体の前記テーパー部と、前記端子の前記縮径部との間に挟まれており、
前記端子の前記主部の前記軸方向に対する前記封口体の前記テーパー部の傾斜角は、前記軸方向に対する前記縮径部の傾斜角よりも大きいことを特徴とする封口体ユニット。 - 前記封口体の前記テーパー部と前記端子の前記縮径部との間に挟まれた前記ガスケットの前記少なくとも一部は、最大厚さを有する第1の部分と、最小厚さを有する第2の部分とを含み、前記第2の部分は、前記第1の部分よりも、前記立ち上がり部の前記先端に近いところに配置されていることを特徴とする請求項11に記載の封口体ユニット。
- 前記立ち上がり部の厚さは、0.3mm以下であることを特徴とする請求項12に記載の封口体ユニット。
- 前記立ち上がり部を取り囲んだ拘束部材を更に具備し、
前記立ち上がり部は、前記ガスケットの前記少なくとも一部と前記拘束部材との間に挟まれていることを特徴とする請求項12に記載の封口体ユニット。 - 前記封口体が、金属、合金、樹脂、又は樹脂層と金属層及び/又は合金層との積層体で形成されていることを特徴とする請求項12に記載の封口体ユニット。
- 端子接続部と前記端子接続部を貫通した貫通孔とを含んだリードを更に具備し、
前記端子接続部は、前記封口体の前記第2の面に向き合っており、
前記端子の前記主部は、前記リードの前記貫通孔に嵌め込まれていることを特徴とする請求項12に記載の封口体ユニット。 - 前記端子が前記リードにかしめ固定されていることを特徴とする請求項16に記載の封口体ユニット。
- 前記封口体の前記第2の面に向き合った端子接続部と、前記封口体の前記第2の面に向き合った面から延びた突起部と含むリードを更に具備し、
前記端子は、前記第2の端部に設けられた凹部又は前記第2の端部から前記第1の端部まで貫通した貫通孔を更に具備し、
前記端子接続部の前記突起部は、前記端子の前記凹部又は前記貫通孔に嵌め込まれていることを特徴とする請求項12に記載の封口体ユニット。 - 前記端子と前記リードとが溶接によって接合されていることを特徴とする請求項16又は18に記載の封口体ユニット。
- 前記リードが、前記封口体の前記立ち上がり部を囲んだ部分を更に具備し、
前記立ち上がり部は、前記ガスケットの前記少なくとも一部と前記リードとの間に挟まれていることを特徴とする請求項18に記載の封口体ユニット。 - 開口を有する外装体と、
前記外装体内に収容された電極体と、
前記外装体の前記開口を封止した請求項11に記載の封口体ユニットであって、前記第2の面が前記電極体と向き合っている封口体ユニットと
を具備する電池。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP15743020.8A EP3101710B1 (en) | 2014-01-29 | 2015-01-29 | Battery with gasket |
EP19178386.9A EP3579295A1 (en) | 2014-01-29 | 2015-01-29 | Battery and seal unit |
CN201580006450.4A CN105940522B (zh) | 2014-01-29 | 2015-01-29 | 电池及封口体单元 |
JP2015560018A JP6162826B2 (ja) | 2014-01-29 | 2015-01-29 | 電池及び封口体ユニット |
US15/223,934 US9960393B2 (en) | 2014-01-29 | 2016-07-29 | Battery and seal unit |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014-014878 | 2014-01-29 | ||
JP2014014878 | 2014-01-29 | ||
JP2014265264 | 2014-12-26 | ||
JP2014-265264 | 2014-12-26 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/223,934 Continuation US9960393B2 (en) | 2014-01-29 | 2016-07-29 | Battery and seal unit |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015115557A1 true WO2015115557A1 (ja) | 2015-08-06 |
Family
ID=53757127
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2015/052552 WO2015115557A1 (ja) | 2014-01-29 | 2015-01-29 | 電池及び封口体ユニット |
Country Status (5)
Country | Link |
---|---|
US (1) | US9960393B2 (ja) |
EP (2) | EP3101710B1 (ja) |
JP (1) | JP6162826B2 (ja) |
CN (1) | CN105940522B (ja) |
WO (1) | WO2015115557A1 (ja) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016199939A1 (ja) * | 2015-06-12 | 2016-12-15 | 株式会社 東芝 | 電池及び組電池 |
JPWO2016204147A1 (ja) * | 2015-06-15 | 2018-01-11 | 株式会社東芝 | 電池及び電池パック |
WO2019049377A1 (ja) * | 2017-09-11 | 2019-03-14 | 株式会社 東芝 | 電池及び電池パック |
WO2019123619A1 (ja) * | 2017-12-21 | 2019-06-27 | 株式会社 東芝 | 蓄電モジュール及び電池パック |
JP2019179664A (ja) * | 2018-03-30 | 2019-10-17 | 株式会社Gsユアサ | 蓄電素子の製造方法及び蓄電素子 |
JP2021028888A (ja) * | 2019-08-09 | 2021-02-25 | 株式会社村田製作所 | 電池 |
WO2021221018A1 (ja) * | 2020-04-30 | 2021-11-04 | 株式会社村田製作所 | 二次電池 |
WO2023002807A1 (ja) * | 2021-07-20 | 2023-01-26 | 株式会社村田製作所 | 二次電池 |
JP7493901B2 (ja) | 2022-08-09 | 2024-06-03 | Nissha株式会社 | 二次電池及びその組電池 |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018201281A1 (de) * | 2018-01-29 | 2019-08-01 | Robert Bosch Gmbh | Batterie, insbesondere Lithium-Ionen-Batterie, und Verfahren zum Herstellen einer Batterie, insbesondere einer Lithium-Ionen-Batterie |
DE102018209270B4 (de) * | 2018-06-11 | 2022-09-22 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zum Herstellen einer Deckelbaugruppe für ein Zellgehäuse einer prismatischen Batteriezelle einer Hochvoltbatterie eines Kraftfahrzeugs, Batteriezelle sowie Hochvoltbatterie |
DE102018251709A1 (de) | 2018-12-27 | 2020-07-02 | Robert Bosch Gmbh | Batteriezelle |
CN210110860U (zh) * | 2019-09-11 | 2020-02-21 | 宁德时代新能源科技股份有限公司 | 顶盖组件与二次电池 |
CN115088117B (zh) * | 2020-03-31 | 2024-08-27 | 松下知识产权经营株式会社 | 封口体以及电池 |
KR20220008784A (ko) * | 2020-07-14 | 2022-01-21 | 주식회사 엘지에너지솔루션 | 벤팅 홀 단자를 구비하는 배터리 모듈, 그리고 이를 포함하는 배터리 팩 및 자동차 |
CN113839128B (zh) * | 2021-09-23 | 2023-01-24 | 厦门海辰储能科技股份有限公司 | 用于电池的顶盖组件、电池及储能装置 |
US11721861B2 (en) | 2021-09-23 | 2023-08-08 | Xiamen Hithium Energy Storage Technology Co., Ltd. | Top cover assembly for battery, battery, and energy storage device |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001196047A (ja) * | 1999-12-15 | 2001-07-19 | Samsung Sdi Co Ltd | キャップ組立体を有する二次電池 |
JP2005056649A (ja) * | 2003-08-01 | 2005-03-03 | Hitachi Maxell Ltd | 密閉型電池 |
JP2012226836A (ja) | 2011-04-14 | 2012-11-15 | Toyota Motor Corp | 電池の製造方法 |
JP2012227026A (ja) | 2011-04-20 | 2012-11-15 | Toyota Motor Corp | 電池及び電池の製造方法 |
JP2013137990A (ja) * | 2011-11-29 | 2013-07-11 | Gs Yuasa Corp | 蓄電素子 |
JP2013149476A (ja) * | 2012-01-19 | 2013-08-01 | Fdk Tottori Co Ltd | 密閉型電池用封口体、密閉型電池及びその製造方法 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2225224B1 (ja) * | 1973-04-11 | 1977-03-04 | Kobe Steel Ltd | |
JPS5544815U (ja) * | 1978-09-14 | 1980-03-24 | ||
US4893844A (en) * | 1983-04-29 | 1990-01-16 | Baker Hughes Incorporated | Tubular coupling with ventable seal |
US5029906A (en) * | 1983-04-29 | 1991-07-09 | Baker Hughes Incorporated | Method and apparatus for forming a ventable seal |
JP2897104B2 (ja) | 1994-06-03 | 1999-05-31 | 古河電池株式会社 | 密閉型アルカリ蓄電池の製造方法 |
JP3756097B2 (ja) | 2001-10-02 | 2006-03-15 | Necトーキン栃木株式会社 | 密閉型電池 |
JP4124756B2 (ja) * | 2003-10-03 | 2008-07-23 | 日立マクセル株式会社 | 密閉型電池 |
JP2009048969A (ja) | 2007-08-23 | 2009-03-05 | Toyota Motor Corp | 電池 |
EP3059785B1 (en) * | 2009-04-30 | 2019-08-07 | Water Gremlin Company | Battery parts having retaining and sealing features |
JP2012226834A (ja) | 2011-04-14 | 2012-11-15 | Toyota Motor Corp | 電池 |
JP2012238510A (ja) | 2011-05-12 | 2012-12-06 | Toyota Motor Corp | 電池の製造方法 |
-
2015
- 2015-01-29 EP EP15743020.8A patent/EP3101710B1/en active Active
- 2015-01-29 CN CN201580006450.4A patent/CN105940522B/zh active Active
- 2015-01-29 WO PCT/JP2015/052552 patent/WO2015115557A1/ja active Application Filing
- 2015-01-29 EP EP19178386.9A patent/EP3579295A1/en not_active Withdrawn
- 2015-01-29 JP JP2015560018A patent/JP6162826B2/ja active Active
-
2016
- 2016-07-29 US US15/223,934 patent/US9960393B2/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001196047A (ja) * | 1999-12-15 | 2001-07-19 | Samsung Sdi Co Ltd | キャップ組立体を有する二次電池 |
JP2005056649A (ja) * | 2003-08-01 | 2005-03-03 | Hitachi Maxell Ltd | 密閉型電池 |
JP2012226836A (ja) | 2011-04-14 | 2012-11-15 | Toyota Motor Corp | 電池の製造方法 |
JP2012227026A (ja) | 2011-04-20 | 2012-11-15 | Toyota Motor Corp | 電池及び電池の製造方法 |
JP2013137990A (ja) * | 2011-11-29 | 2013-07-11 | Gs Yuasa Corp | 蓄電素子 |
JP2013149476A (ja) * | 2012-01-19 | 2013-08-01 | Fdk Tottori Co Ltd | 密閉型電池用封口体、密閉型電池及びその製造方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP3101710A4 |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPWO2016199939A1 (ja) * | 2015-06-12 | 2018-01-11 | 株式会社東芝 | 電池及び組電池 |
WO2016199939A1 (ja) * | 2015-06-12 | 2016-12-15 | 株式会社 東芝 | 電池及び組電池 |
US10559806B2 (en) | 2015-06-12 | 2020-02-11 | Kabushiki Kaisha Toshiba | Battery and battery module |
US10461369B2 (en) | 2015-06-15 | 2019-10-29 | Kabushiki Kaisha Toshiba | Battery and battery pack |
JPWO2016204147A1 (ja) * | 2015-06-15 | 2018-01-11 | 株式会社東芝 | 電池及び電池パック |
WO2019049377A1 (ja) * | 2017-09-11 | 2019-03-14 | 株式会社 東芝 | 電池及び電池パック |
WO2019123619A1 (ja) * | 2017-12-21 | 2019-06-27 | 株式会社 東芝 | 蓄電モジュール及び電池パック |
JP2019179664A (ja) * | 2018-03-30 | 2019-10-17 | 株式会社Gsユアサ | 蓄電素子の製造方法及び蓄電素子 |
JP2021028888A (ja) * | 2019-08-09 | 2021-02-25 | 株式会社村田製作所 | 電池 |
JP7334532B2 (ja) | 2019-08-09 | 2023-08-29 | 株式会社村田製作所 | 電池 |
WO2021221018A1 (ja) * | 2020-04-30 | 2021-11-04 | 株式会社村田製作所 | 二次電池 |
JPWO2021221018A1 (ja) * | 2020-04-30 | 2021-11-04 | ||
JP7548303B2 (ja) | 2020-04-30 | 2024-09-10 | 株式会社村田製作所 | 二次電池 |
WO2023002807A1 (ja) * | 2021-07-20 | 2023-01-26 | 株式会社村田製作所 | 二次電池 |
JP7493901B2 (ja) | 2022-08-09 | 2024-06-03 | Nissha株式会社 | 二次電池及びその組電池 |
Also Published As
Publication number | Publication date |
---|---|
EP3101710B1 (en) | 2019-07-24 |
CN105940522B (zh) | 2019-03-08 |
US20160336554A1 (en) | 2016-11-17 |
US9960393B2 (en) | 2018-05-01 |
EP3101710A4 (en) | 2017-11-15 |
CN105940522A (zh) | 2016-09-14 |
JPWO2015115557A1 (ja) | 2017-03-23 |
JP6162826B2 (ja) | 2017-07-12 |
EP3101710A1 (en) | 2016-12-07 |
EP3579295A1 (en) | 2019-12-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6162826B2 (ja) | 電池及び封口体ユニット | |
JP6794502B2 (ja) | 電池及び電池パック | |
CN107534101B (zh) | 电池及组电池 | |
JP4470124B2 (ja) | 電池 | |
KR101867374B1 (ko) | 전극 단자를 구비한 배터리 덮개, 전극 단자를 구비한 배터리 덮개 제조 방법 및 실링된 배터리 | |
JP6173729B2 (ja) | 電池の製造方法 | |
JP5173095B2 (ja) | 密閉型電池 | |
JP2008305646A (ja) | 電池 | |
JP3891047B2 (ja) | 電池 | |
CN111033804B (zh) | 蓄电模块以及电池组 | |
JP5679272B2 (ja) | 電極端子付き電池蓋および密閉型電池 | |
JP2009054531A (ja) | 電池 | |
JP2008305645A (ja) | 電池 | |
CN111247660B (zh) | 圆筒形电池 | |
WO2019194227A1 (ja) | 電池 | |
WO2019186932A1 (ja) | 電池及び電池パック | |
JP2010033940A (ja) | 電池 | |
JP2004241171A (ja) | 密閉型電池 | |
JP2015060712A (ja) | 二次電池 | |
WO2019186868A1 (ja) | 電池と電池パック | |
JP6289843B2 (ja) | 電池及び電池の製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 15743020 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2015560018 Country of ref document: JP Kind code of ref document: A |
|
REEP | Request for entry into the european phase |
Ref document number: 2015743020 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2015743020 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |