JP6846490B1 - 蓄電素子及び蓄電素子の製造方法 - Google Patents
蓄電素子及び蓄電素子の製造方法 Download PDFInfo
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- 238000003860 storage Methods 0.000 title claims abstract description 142
- 238000004519 manufacturing process Methods 0.000 title claims description 25
- 239000000463 material Substances 0.000 claims abstract description 119
- 239000007774 positive electrode material Substances 0.000 claims abstract description 80
- 230000004308 accommodation Effects 0.000 claims abstract description 18
- 239000007773 negative electrode material Substances 0.000 claims description 40
- 229910052744 lithium Inorganic materials 0.000 claims description 23
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 21
- 239000008151 electrolyte solution Substances 0.000 claims description 17
- 239000011888 foil Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 9
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- 230000001070 adhesive effect Effects 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 claims description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 238000010586 diagram Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 162
- 239000000565 sealant Substances 0.000 description 31
- 229910052751 metal Inorganic materials 0.000 description 21
- 239000002184 metal Substances 0.000 description 21
- -1 phosphate compound Chemical class 0.000 description 16
- 238000003466 welding Methods 0.000 description 15
- 238000001556 precipitation Methods 0.000 description 14
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical class [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 11
- 239000007772 electrode material Substances 0.000 description 11
- 229910001416 lithium ion Inorganic materials 0.000 description 10
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- 239000002904 solvent Substances 0.000 description 8
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000012752 auxiliary agent Substances 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 239000011267 electrode slurry Substances 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 3
- 239000002033 PVDF binder Substances 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
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- 238000009413 insulation Methods 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 3
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 2
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000004840 adhesive resin Substances 0.000 description 2
- 229920006223 adhesive resin Polymers 0.000 description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 2
- 239000006182 cathode active material Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
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- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229910013275 LiMPO Inorganic materials 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 150000005676 cyclic carbonates Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000010220 ion permeability Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229910000625 lithium cobalt oxide Inorganic materials 0.000 description 1
- 229910001386 lithium phosphate Inorganic materials 0.000 description 1
- SBWRUMICILYTAT-UHFFFAOYSA-K lithium;cobalt(2+);phosphate Chemical compound [Li+].[Co+2].[O-]P([O-])([O-])=O SBWRUMICILYTAT-UHFFFAOYSA-K 0.000 description 1
- ILXAVRFGLBYNEJ-UHFFFAOYSA-K lithium;manganese(2+);phosphate Chemical compound [Li+].[Mn+2].[O-]P([O-])([O-])=O ILXAVRFGLBYNEJ-UHFFFAOYSA-K 0.000 description 1
- BFZPBUKRYWOWDV-UHFFFAOYSA-N lithium;oxido(oxo)cobalt Chemical compound [Li+].[O-][Co]=O BFZPBUKRYWOWDV-UHFFFAOYSA-N 0.000 description 1
- URIIGZKXFBNRAU-UHFFFAOYSA-N lithium;oxonickel Chemical compound [Li].[Ni]=O URIIGZKXFBNRAU-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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- 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
- H01M10/058—Construction or manufacture
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
-
- 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
- H01M10/04—Construction or manufacture in general
-
- 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
- H01M10/04—Construction or manufacture in general
- H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
-
- 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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
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- 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 of a single cell or a single battery
-
- 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
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- 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
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- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
Description
第1外装材および第2外装材を含む外装体と、
前記第1外装材と前記第2外装材との間に形成される収容空間に収容され、第1方向に交互に積層された負極及び正極を含む電極体と、を備え、
前記負極は、負極集電箔と、負極集電箔の少なくとも一方の面上に設けられた負極活物質を含む負極活物質層と、を有し、
前記正極は、正極集電箔と、正極集電箔の少なくとも一方の面上に設けられた正極活物質を含む正極活物質層と、を有し、
前記電極体の前記第1方向に沿った厚みT〔mm〕の2乗に対する前記正極活物質層の平均面積A〔mm2〕の比の値(A/T2)は、100以上20000以下であり、
前記負極と前記正極との合計枚数は10枚以上である。
平面視における前記外装体の面積は12000mm2以上900000mm2以下であるようにしてもよい。
前記正極活物質層は平面視において矩形状を有し、
平面視における前記正極活物質層の長辺の長さ〔mm〕の前記正極活物質層の短辺の長さ〔mm〕に対する比の値は1.50以上5.00以下であるようにしてもよい。
前記外装体は平面視において矩形状を有し、
平面視における前記外装体の長辺の長さ〔mm〕の前記外装体の短辺の長さ〔mm〕に対する比の値は1.50以上5.00以下であるようにしてもよい。
上述した本発明による蓄電素子のいずれかの製造方法であって、
前記正極および前記負極の間に絶縁シートを介在させるようにして前記電極体を作製する工程と、
前記電極体を前記外装体内に収容して前記外装体を封止する工程と、を備え、
前記電極体を作製する工程において、粘着性を有する前記絶縁シートによって、当該絶縁シートに隣接する前記正極および前記負極を当該絶縁シートに仮留めする。
<蓄電素子の作製>
5 電極体
6 タブ
7 外装体
7a 収容空間
8 シール部
10 第1電極
10X 正極
11 第1電極集電体
11X 正極集電体
12 第1電極活物質層
12X 正極活物質層
20 第2電極
20Y 負極
21 第2電極集電体
21Y 負極集電体
22 第2電極活物質層
22Y 負極活物質層
30 絶縁シート
35 接合部
40 第1外装材
41 第1金属層
42 第1シーラント層
43 第1絶縁層
47 膨出部
50 第2外装材
51 第2金属層
52 第2シーラント層
53 第2絶縁層
d1 第1方向
d2 第2方向
d3 第3方向
a1 第1接続領域
b1 第1電極領域
a2 第2接続領域
b2 第2電極領域
Claims (12)
- 第1外装材および第2外装材を含む外装体と、
前記第1外装材と前記第2外装材との間に形成される収容空間に収容され、第1方向に交互に積層された負極及び正極を含む電極体と、を備え、
前記負極は、負極集電箔と、負極集電箔の少なくとも一方の面上に設けられた負極活物質を含む負極活物質層と、を有し、
前記正極は、正極集電箔と、正極集電箔の少なくとも一方の面上に設けられた正極活物質を含む正極活物質層と、を有し、
前記電極体の前記第1方向に沿った厚みT〔mm〕の2乗に対する前記正極活物質層の平均面積A〔mm2〕の比の値(A/T2)は、100以上20000以下であり、
前記負極と前記正極との合計枚数は10枚以上である、蓄電素子。 - 前記正極活物質層の平均面積Aは8400mm2以上756000mm2以下である、請求項1に記載の蓄電素子。
- 前記電極体の前記第1方向に沿った厚さは0.3mm以上10mm以下である、請求項1又は2に記載の蓄電素子。
- 前記正極活物質層は平面視において矩形状を有し、
平面視における前記正極活物質層の長辺の長さ〔mm〕の前記正極活物質層の短辺の長さ〔mm〕に対する比の値は1.50以上5.00以下である、請求項1〜3のいずれか一項に記載の蓄電素子。 - 密充電時における電圧が4.0〔V〕以下である、請求項1〜4のいずれか一項に記載の蓄電素子。
- 密充電時における前記正極の平均反応電位は4.0〔V vs Li/Li+〕以下である、請求項1〜5のいずれか一項に記載の蓄電素子。
- 前記正極活物質層はリン酸鉄リチウムを前記正極活物質として含む、請求項1〜6のいずれか一項に記載の蓄電素子。
- 密充電時における前記負極の平均反応電位は1.5〔V vs Li/Li+〕以上である、請求項1〜7のいずれか一項に記載の蓄電素子。
- 前記負極活物質層はチタン酸リチウムを前記負極活物質として含む、請求項1〜8のいずれか一項に記載の蓄電素子。
- 前記第1外装材及び前記第2外装材は、縁部に位置する接合部において接合している、請求項1〜9のいずれか一項に記載の蓄電素子。
- 請求項1〜10のいずれか一項に記載の蓄電素子の製造方法であって、
前記正極および前記負極の間に絶縁シートを介在させるようにして前記電極体を作製する工程と、
前記電極体を前記外装体内に収容して前記外装体を封止する工程と、を備え、
前記電極体を作製する工程において、粘着性を有する前記絶縁シートによって、当該絶縁シートに隣接する前記正極および前記負極を当該絶縁シートに仮留めする、蓄電素子の製造方法。 - 前記電極体を作製する工程において、前記正極及び前記負極に積層する前記絶縁シートに電解液が含浸している、請求項11に記載の蓄電素子の製造方法。
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JP2019174781A JP6846490B1 (ja) | 2019-09-25 | 2019-09-25 | 蓄電素子及び蓄電素子の製造方法 |
CN202080038811.4A CN113906608A (zh) | 2019-09-25 | 2020-09-24 | 蓄电元件和蓄电元件的制造方法 |
PCT/JP2020/036120 WO2021060405A1 (ja) | 2019-09-25 | 2020-09-24 | 蓄電素子及び蓄電素子の製造方法 |
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