JP7456947B2 - 積層型二次電池 - Google Patents
積層型二次電池 Download PDFInfo
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- JP7456947B2 JP7456947B2 JP2020569402A JP2020569402A JP7456947B2 JP 7456947 B2 JP7456947 B2 JP 7456947B2 JP 2020569402 A JP2020569402 A JP 2020569402A JP 2020569402 A JP2020569402 A JP 2020569402A JP 7456947 B2 JP7456947 B2 JP 7456947B2
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- 239000011149 active material Substances 0.000 claims description 70
- 239000003792 electrolyte Substances 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 20
- 239000002131 composite material Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 239000002033 PVDF binder Substances 0.000 claims description 6
- 239000008151 electrolyte solution Substances 0.000 claims description 6
- 239000011810 insulating material Substances 0.000 claims description 6
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 6
- 239000011888 foil Substances 0.000 claims description 5
- 229910044991 metal oxide Inorganic materials 0.000 claims description 4
- 150000004706 metal oxides Chemical class 0.000 claims description 4
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 3
- 239000004925 Acrylic resin Substances 0.000 claims description 2
- 229920000178 Acrylic resin Polymers 0.000 claims description 2
- 239000004962 Polyamide-imide Substances 0.000 claims description 2
- 239000004642 Polyimide Substances 0.000 claims description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 2
- 239000004760 aramid Substances 0.000 claims description 2
- 229920003235 aromatic polyamide Polymers 0.000 claims description 2
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical group FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 claims description 2
- 229920002312 polyamide-imide Polymers 0.000 claims description 2
- 229920001721 polyimide Polymers 0.000 claims description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 description 29
- 239000007788 liquid Substances 0.000 description 22
- 239000011162 core material Substances 0.000 description 21
- 239000000203 mixture Substances 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 13
- 239000012466 permeate Substances 0.000 description 11
- 229910052782 aluminium Inorganic materials 0.000 description 9
- 238000010586 diagram Methods 0.000 description 9
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
- 230000014759 maintenance of location Effects 0.000 description 8
- 239000002002 slurry Substances 0.000 description 8
- -1 for example Inorganic materials 0.000 description 7
- 239000011230 binding agent Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 6
- 238000007600 charging Methods 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000006258 conductive agent Substances 0.000 description 4
- 239000002612 dispersion medium Substances 0.000 description 4
- 239000002409 silicon-based active material Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 239000002562 thickening agent Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 241000156302 Porcine hemagglutinating encephalomyelitis virus Species 0.000 description 2
- 239000002388 carbon-based active material Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- SOXUFMZTHZXOGC-UHFFFAOYSA-N [Li].[Mn].[Co].[Ni] Chemical compound [Li].[Mn].[Co].[Ni] SOXUFMZTHZXOGC-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- VXAUWWUXCIMFIM-UHFFFAOYSA-M aluminum;oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Al+3] VXAUWWUXCIMFIM-UHFFFAOYSA-M 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000010277 constant-current charging Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000010220 ion permeability Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Description
Claims (14)
- 少なくとも1つの正極板と少なくとも1つの負極板とが、異なる材質で形成された多孔質の2層を含む複数層状のセパレータを介して積層された電極体と、
絶縁材からなるシートを折り重ねて形成され、前記電極体を収容した絶縁ホルダと、
前記絶縁ホルダと電解液を前記電極体と共に収容した外装ケースと、
を有し、
前記外装ケースは、底面、前記底面から立設した複数の側壁、及び前記底面と対向して前記複数の側壁によって囲われた開口を有し、
前記セパレータは、前記正極板、及び前記負極板における金属箔からなる芯体、及び活物質合材層の端面から露出している露出部を有し、
前記絶縁ホルダのうちの前記外装ケースの前記複数の側壁の内の一つの側壁に対向する部分は、前記シートを折り重ねて形成されたV字形の谷部を有し、
前記谷部は、前記電解液が前記外装ケースの底部に溜まっている領域から、前記電極体のうちの前記ケースの前記底部の反対側の上部まで形成されており、
前記セパレータの前記露出部と前記絶縁ホルダとの間に形成される隙間が、前記外装ケースの前記底部の前記電解液を前記電極体の前記上部まで吸い上げ可能とした状態で、前記露出部が、前記シートで形成される前記谷部の底線近傍に接触している、
積層型二次電池。 - 前記セパレータの前記露出部は、前記シートで形成される前記谷部の底線と接触している、
請求項1に記載の積層型二次電池。 - 前記シートは前記谷部を構成するように折り重なる2つのシート要素を有し、
前記シートの前記2つのシート要素の形状は、互いに非対称である、
請求項1または請求項2に記載の積層型二次電池。 - 前記絶縁ホルダの前記部分には、前記セパレータの端部と対向する部分の形状が、複数の山形が連なるひだ状になって前記谷部が複数構成されている、
請求項1から請求項3のいずれか1項に記載の積層型二次電池。 - 前記電極体は、第1の活物質層及び前記第1の活物質層上に形成された第2の活物質層を有する電極を含む、
請求項1から請求項4のいずれか1項に記載の積層型二次電池。 - 前記第1の活物質層は、前記第2の活物質層よりも密度が大きい、
請求項5に記載の積層型二次電池。 - 前記第1の活物質層は、前記第2の活物質層よりも空隙が小さい、
請求項5に記載の積層型二次電池。 - 前記第1の活物質層の材質は、前記第2の活物質層の材質と異なる、
請求項5に記載の積層型二次電池。 - 前記第1の活物質層及び前記第1の活物質層上に形成された前記第2の活物質層を有する前記電極は、前記負極板である、
請求項5に記載の積層型二次電池。 - 前記第1の活物質層はシリコンを含んだ材料により形成される、
請求項9に記載の積層型二次電池。 - 前記セパレータは、セパレータ本体と材質が異なる多孔質層が、前記セパレータ本体の片面、または両面に少なくとも1層以上形成されている、
請求項1から請求項10のいずれか1項に記載の積層型二次電池。 - 前記セパレータに形成されている前記多孔質層はポリフッ化ビニリデン、アクリル樹脂、ポリビニルアルコール、ヘキサフルオロプロピレン、スチレンブタジエンゴム、ポリイミド、アラミド、ポリアミドイミドを少なくとも1つを含む、
請求項11に記載の積層型二次電池。 - 前記セパレータに形成されている前記多孔質層はAlを含んだ金属酸化物を含む、
請求項11に記載の積層型二次電池。 - 前記セパレータに形成されている前記多孔質層はTiを含んだ金属酸化物を含む、
請求項11に記載の積層型二次電池。
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