JP2023079669A - 非水電解質二次電池 - Google Patents
非水電解質二次電池 Download PDFInfo
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- 239000011255 nonaqueous electrolyte Substances 0.000 title claims abstract description 54
- 239000007773 negative electrode material Substances 0.000 claims abstract description 104
- 239000007774 positive electrode material Substances 0.000 claims abstract description 54
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 10
- 229910001416 lithium ion Inorganic materials 0.000 description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 9
- 239000011241 protective layer Substances 0.000 description 9
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
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- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 2
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- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 1
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- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 1
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- 230000005611 electricity Effects 0.000 description 1
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 1
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- 229910052723 transition metal Inorganic materials 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
- 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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/105—Pouches or flexible bags
-
- 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
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- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- 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
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- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/366—Composites as layered products
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- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag cells
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- 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
- H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
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- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/46—Separators, membranes or diaphragms characterised by their combination with electrodes
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- Battery Electrode And Active Subsutance (AREA)
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Abstract
Description
0.95<M2/M1<1
を満たす。
12 外装体
14 封口板
20 電極体群
20a、20b、20c 電極体
22 正極
22a 正極活物質層
22c 正極芯体
22t 正極タブ
24 負極
24a 負極活物質層
24c 負極芯体
24t 負極タブ
24r 第1領域
24s 傾斜部
26 セパレータ
30 正極端子
40 負極端子
50 正極集電部
60 負極集電部
100 非水電解質二次電池
120a 電極体
Claims (9)
- 正極、負極、及び前記正極と前記負極の間に配置されたセパレータを含む電極体を備えた非水電解質二次電池であって、
前記正極は、正極芯体と、前記正極芯体の両面に形成された正極活物質層とを含み、
前記負極は、負極芯体と、前記負極芯体の両面に形成された負極活物質層とを含み、
前記負極の幅方向の一方の端辺には、前記負極芯体の一部により構成され、該端辺から突出した負極タブが設けられており、
前記負極活物質層は、前記負極の幅方向において、前記端辺と、前記端辺から5mmの間に第1領域を有し、
前記正極の端部が、前記セパレータを介して、前記第1領域の少なくとも一部と対向し、
前記正極の中央部における前記正極活物質層の厚みT1と、前記正極の端部における前記正極活物質層の厚みT2との関係は、0.95<T2/T1<1.05であり、
前記負極の中央部の前記負極活物質層の目付(単位面積当たりの当該負極活物質層の質量)M1と、前記第1領域において、前記正極活物質層と対向する領域の前記負極活物質層の目付(単位面積当たりの当該負極活物質層の質量)M2とが以下の条件:
0.95<M2/M1<1
を満たす、非水電解質二次電池。 - 前記第1領域において、前記負極活物質層は、前記負極活物質層の厚みが前記端辺に向かって徐々に小さくなるように形成されている、請求項1に記載の非水電解質二次電池。
- 前記正極が、前記正極芯体の一部により構成される正極タブを有し、
前記電極体が、一方の端部に複数の前記負極タブを有し、他方の端部に複数の前記正極タブを有する、請求項1または2に記載の非水電解質二次電池。 - 前記電極体が、帯状の前記正極と、帯状の前記負極とが、帯状の前記セパレータを介して巻回された巻回電極体である、請求項1~3のいずれか一項に記載の非水電解質二次電池。
- 前記巻回電極体の巻回軸方向における、前記負極活物質層の幅は20cm以上である、請求項4に記載の非水電解質二次電池。
- 複数の前記負極タブが積層されて構成される負極タブ群と、当該負極タブに電気的に接続された負極集電部材とを含み、前記負極タブ群が折り曲げられて前記負極集電部材と接続されている、請求項1~5のいずれか一項に記載の非水電解質二次電池。
- 前記セパレータが、両表面に接着層を有する、請求項1~6のいずれか一項に記載の非水電解質二次電池。
- 前記負極活物質層が、前記セパレータの端部から、前記負極タブの突出方向に突出して前記負極タブ上に形成されている、請求項1~7のいずれか一項に記載の非水電解質二次電池。
- 前記第1領域が、前記正極活物質層と対向しない領域を有し、
前記負極の幅方向において、前記第1領域における前記正極と対向する領域の幅が、前記第1領域における前記正極と対向しない領域の幅よりも大きい、請求項1~8のいずれか一項に記載の非水電解質二次電池。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021193248A JP7446271B2 (ja) | 2021-11-29 | 2021-11-29 | 非水電解質二次電池 |
US18/058,438 US20230170461A1 (en) | 2021-11-29 | 2022-11-23 | Nonaqueous electrolyte secondary battery |
EP22209338.7A EP4187668A1 (en) | 2021-11-29 | 2022-11-24 | Nonaqueous electrolyte secondary battery |
KR1020220158974A KR20230080325A (ko) | 2021-11-29 | 2022-11-24 | 비수전해질 이차 전지 |
CN202211496679.9A CN116190871A (zh) | 2021-11-29 | 2022-11-25 | 非水电解质二次电池 |
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JP2021193248A JP7446271B2 (ja) | 2021-11-29 | 2021-11-29 | 非水電解質二次電池 |
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JP2018056017A (ja) | 2016-09-29 | 2018-04-05 | リチウム エナジー アンド パワー ゲゼルシャフト ミット ベシュレンクテル ハフッング ウント コンパニー コマンディトゲゼルシャフトLithium Energy and Power GmbH & Co. KG | 蓄電素子 |
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