JP7216869B2 - 二次電池及び該二次電池を備える電池モジュール、電池パック、装置 - Google Patents
二次電池及び該二次電池を備える電池モジュール、電池パック、装置 Download PDFInfo
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- JP7216869B2 JP7216869B2 JP2022508962A JP2022508962A JP7216869B2 JP 7216869 B2 JP7216869 B2 JP 7216869B2 JP 2022508962 A JP2022508962 A JP 2022508962A JP 2022508962 A JP2022508962 A JP 2022508962A JP 7216869 B2 JP7216869 B2 JP 7216869B2
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- negative electrode
- secondary battery
- battery
- silicon
- positive electrode
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- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
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- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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- H—ELECTRICITY
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- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
- H01M50/133—Thickness
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- H—ELECTRICITY
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- 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
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- H—ELECTRICITY
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- 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
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/578—Devices or arrangements for the interruption of current in response to pressure
-
- 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
- H01M2004/021—Physical characteristics, e.g. porosity, surface area
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
- H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
-
- 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
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- 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
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- 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
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Description
1…電池パック、2…上部ボックス、3…下部ボックス、4…電池モジュール、5…二次電池、51…ケース、52…電極組立体、53…カバープレート。
各実施例及び比較例の電池を1Cの倍率で0%SOCまで放電した後、排水法によって電気コアの体積V0を測定する。
一定の体積V(cm3)の電解液を取り、電子秤でその質量m(g)を測定し、Del=m/Vである。
各実施例及び比較例の電池を1Cの倍率で0%SOCまで放電した後、マイクロメータを使用して負極フィルムの厚さHa(片面)を測定する。
各実施例及び比較例の電池を1Cの倍率で100%SOCまで充電した後、マイクロメータを使用して負極フィルムの厚さHb(片面)を測定する。
S=負極フィルムの全長*負極フィルムの幅*ケース内の電気コアの数
S=2*負極フィルムの全長(片面)*負極フィルムの幅(片面)*ケース内の電気コアの数
S=1つの負極シートにおける負極フィルムの長さ*1つの負極シートにおける負極フィルムの幅*負極シートの数
S=2*1つの負極シートにおける負極フィルムの長さ(片面)*1つの負極シートにおける負極フィルムの幅(片面)*負極シートの数
実施例及び比較例で製造されたリチウムイオン電池にガス発生装置を取り付け、1C/1Cで完全に充放電して容量を測定し、その後、1Cで完全に充電し、電池を70℃で放置し72時間貯蔵して内圧値を読み取る。
25℃で、実施例及び比較例で製造されたリチウムイオン電池を3Cで完全に充電し、1Cで完全に放電したことを10回繰り返し、リチウムイオン電池を3Cで完全に充電した後、負極シートを分解し、負極シートの平坦度及び表面のリチウム析出状態を観察する。ここで、負極の表面のリチウム析出領域の面積が5%よりも小さいことは僅かなリチウム析出であり、負極の表面のリチウム析出領域の面積が5%~40%であることは中程度のリチウム析出であり、負極の表面のリチウム析出領域の面積が40%より大きいことは深刻なリチウム析出であると考えられる。
45℃で、実施例及び比較例で製造されたリチウムイオン電池を1Cの倍率で充電し、1Cの倍率で放電し、リチウムイオン電池の容量が初期容量の80%に低減するまで、完全に充放電サイクルを行い、サイクルの回数を記録する。
2…上部ボックス
3…下部ボックス
4…電池モジュール
5…二次電池
51…ケース
52…電極組立体
53…カバープレート
Claims (18)
- ケースと、ケース内に収容された電気コア及び電解液と、を備える二次電池であって、
前記電気コアは、正極シートと、負極シートと、セパレータと、を備え、前記正極シートは、正極集電体と、正極集電体の少なくとも1つの表面上に設けられ、正極活物質を含む正極フィルムと、を含み、前記負極シートは、負極集電体と、負極集電体の少なくとも1つの表面上に設けられ、負極活物質を含む負極フィルムと、を含み、
前記正極活物質は、リチウムニッケルコバルトマンガン酸化物及びリチウムニッケルコバルトアルミニウム酸化物のうちの1種類又は複数種類を含み、前記負極活物質は、シリコン系材料及び炭素材料を含み、且つ前記二次電池は、0.05≦Z≦0.6を満たし、
ここで、
Z={Vt-V0-(Hb-Ha)*S-V1}/CAP、
Vtは、ケースの内部空間の体積を示し、単位がcm3であり、
V0は、電池が0%SOCであるときの電気コアの体積を示し、単位がcm3であり、
Haは、電池が0%SOCであるときの負極フィルムの厚さを示し、単位がcmであり、
Hbは、電池が100%SOCであるときの負極フィルムの厚さを示し、単位がcmであり、
Sは、電池における負極フィルムの総面積を示し、単位がcm2であり、
V1は、化成後の電池における電解液の体積を示し、単位がcm3であり、
CAPは、電池の定格容量を示し、単位がAhである、二次電池。 - 前記二次電池は、0.1≦Z≦0.5を満たす請求項1に記載の二次電池。
- 前記二次電池は、1<Hb/Ha≦1.5を満たす請求項1又は2に記載の二次電池。
- 前記二次電池は、さらに1.5g/Ah≦Mel/CAP≦2.4g/Ahを満たし、ここで、Melは化成後の電池における電解液の質量を示し、単位がgである請求項1から3のいずれか1項に記載の二次電池。
- 前記電解液の密度Delは、1.0g/cm3≦Del≦1.3g/cm3である請求項1から4のいずれか1項に記載の二次電池。
- 前記負極フィルムの塗布重量CWは、5mg/cm2≦CW≦15mg/cm2である請求項1から5のいずれか1項に記載の二次電池。
- 前記負極フィルムの緻密化密度PDは、1.4g/cm3≦PD≦1.8g/cm3である請求項1から6のいずれか1項に記載の二次電池。
- 前記シリコン系材料は、シリコン単体、シリコン合金、シリコン酸素化合物、シリコン炭素化合物、シリコン窒素化合物のうちの1種類又は複数種類を含む請求項1から7のいずれか1項に記載の二次電池。
- 前記負極活物質における前記シリコン系材料の質量比Wは、W≦40%を満たす請求項1から8のいずれか1項に記載の二次電池。
- 前記炭素材料は、黒鉛、ソフトカーボン及びハードカーボンのうちの1種類又は複数種類を含み、前記黒鉛は、人工黒鉛及び天然黒鉛のうちの1種類又は複数種類から選択される請求項1から9のいずれか1項に記載の二次電池。
- 前記ケースの壁の厚さTは、0.2mm≦T≦1mmを満たす請求項1から10のいずれか1項に記載の二次電池。
- 前記二次電池は、反転ユニットが設けられたトップカバーを更に備え、前記反転ユニットの耐圧強度は≧0.35MPaである請求項1から11のいずれか1項に記載の二次電池。
- 前記正極活物質は、一般式とするLiaNibCocMdM’eOfAg、又は表面の少なくとも一部に被覆層が設けられたLiaNibCocMdM’eOfAgのうちの1種類又は複数種類を含み、ここで、0.8≦a≦1.2、0.5≦b<1、0<c<1、0<d<1、0≦e≦0.1、1≦f≦2、0≦g≦1、MはMn、Alのうちの1種類又は複数種類から選択され、M’はZr、Al、Zn、Cu、Cr、Mg、Fe、V、Ti、Bのうちの1種類又は複数種類から選択され、AはN、F、S、Clのうちの1種類又は複数種類から選択される請求項1から12のいずれか1項に記載の二次電池。
- 前記正極活物質の少なくとも一部は単結晶粒子である請求項1から13のいずれか1項に記載の二次電池。
- 前記正極活物質は、リチウムニッケル酸化物、リチウムマンガン酸化物、リン酸鉄リチウム、リン酸マンガンリチウム、リン酸マンガン鉄リチウム、コバルト酸リチウム及びその改質化合物のうちの1種類又は複数種類を更に含む請求項1から12のいずれか1項に記載の二次電池。
- 請求項1から15のいずれか1項に記載の二次電池を備える電池モジュール。
- 請求項16に記載の電池モジュールを備える電池パック。
- 請求項1から15のいずれか1項に記載の二次電池、請求項16に記載の電池モジュール、又は請求項17に記載の電池パックのうちの少なくとも1種類を備える装置。
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US20180342727A1 (en) | 2016-02-15 | 2018-11-29 | Lg Chem, Ltd. | Method of manufacturing negative electrode and negative electrode |
WO2018179897A1 (ja) | 2017-03-29 | 2018-10-04 | パナソニックIpマネジメント株式会社 | 非水電解質二次電池及び電池モジュール |
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WO2021057483A1 (zh) | 2021-04-01 |
US20220102714A1 (en) | 2022-03-31 |
KR102503954B1 (ko) | 2023-02-28 |
EP3958362A4 (en) | 2023-01-11 |
EP3958362A1 (en) | 2022-02-23 |
US11658294B2 (en) | 2023-05-23 |
CN112582596A (zh) | 2021-03-30 |
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CN112582596B (zh) | 2021-10-15 |
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