JP2010238462A - 非水電解液二次電池及びリチウム二次電池 - Google Patents
非水電解液二次電池及びリチウム二次電池 Download PDFInfo
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- 239000011255 nonaqueous electrolyte Substances 0.000 title claims abstract description 29
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 20
- 238000007747 plating Methods 0.000 claims abstract description 104
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 84
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 42
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 34
- 239000011701 zinc Substances 0.000 claims abstract description 34
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 30
- 239000010959 steel Substances 0.000 claims abstract description 30
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000008151 electrolyte solution Substances 0.000 claims abstract description 9
- 229910052751 metal Inorganic materials 0.000 claims description 40
- 239000002184 metal Substances 0.000 claims description 40
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 239000012212 insulator Substances 0.000 claims description 5
- 150000002815 nickel Chemical class 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 25
- 238000005260 corrosion Methods 0.000 abstract description 25
- 239000000243 solution Substances 0.000 abstract description 5
- 238000002788 crimping Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 24
- 229910052742 iron Inorganic materials 0.000 description 16
- 238000010828 elution Methods 0.000 description 14
- 229910021645 metal ion Inorganic materials 0.000 description 14
- 230000000694 effects Effects 0.000 description 11
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 10
- 230000007547 defect Effects 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- 239000003792 electrolyte Substances 0.000 description 9
- -1 polyethylene Polymers 0.000 description 9
- 235000002639 sodium chloride Nutrition 0.000 description 7
- 239000011780 sodium chloride Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 239000010953 base metal Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 229910001335 Galvanized steel Inorganic materials 0.000 description 4
- 238000002845 discoloration Methods 0.000 description 4
- 239000008397 galvanized steel Substances 0.000 description 4
- 238000005246 galvanizing Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000003518 caustics Substances 0.000 description 3
- 238000012790 confirmation Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 3
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 2
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 150000004820 halides Chemical class 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 2
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- FJMNNXLGOUYVHO-UHFFFAOYSA-N aluminum zinc Chemical compound [Al].[Zn] FJMNNXLGOUYVHO-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000005001 laminate film Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 description 1
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 description 1
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
- 235000005074 zinc chloride Nutrition 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
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
- H01M50/1243—Primary casings; Jackets or wrappings characterised by the material having a layered structure characterised by the internal coating on the casing
-
- 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
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
- H01M50/126—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers
- H01M50/128—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers with two or more layers of only 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/117—Inorganic material
- H01M50/119—Metals
-
- 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
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/121—Organic material
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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
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered 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
- H01M50/131—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
- 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
- H01M50/14—Primary casings; Jackets or wrappings for protecting against damage caused by external factors
- H01M50/145—Primary casings; Jackets or wrappings for protecting against damage caused by external factors for protecting against corrosion
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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
- 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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Abstract
【解決手段】めっき層を有する金属製電池缶と金属製蓋とがかしめられた電池缶を有し、非水電解液を用いる二次電池において、金属電池缶のめっき層が、非水電解液側から、ニッケルめっき層,鋼板,亜鉛めっき層,ニッケルめっき層を有することを特徴とする。亜鉛のめっき層の変わりに、アルミニウムや亜鉛/アルミニウム混合層を設けてもよい。ニッケルめっきの厚さが1μmから5μm、亜鉛めっきの厚さが3μmから20μmであることが望ましい。鋼板の厚さは0.2mmから2mmであることが好ましい。
【選択図】 図1
Description
<電池缶の作成>
上記本発明の効果を確認すべく、電池缶4の外面に亜鉛めっき層とニッケルめっき層を設けた実施例の電池缶を作成した。実施例1〜9として、亜鉛めっき層,ニッケルめっき層のそれぞれの平均めっき厚さを変化させ、鋼板上に形成している。ニッケルめっき厚はいずれも2μm,5μm,8μm、亜鉛めっき厚は3μm,10μm,20μmとした。それぞれの実施例の亜鉛めっき層,ニッケルめっき層のそれぞれの平均めっき厚さを表1に示す。
〔試験1:充電前の金属溶出量の確認 1日〕
実施例5〜実施例7および比較例1,比較例2の電池缶を用いて充電前に放置した場合の金属溶出量を測定した。
試験1と同様に、実施例4〜実施例8の各電池について、3.5重量%塩化ナトリウム水溶液に168時間(7日間)浸漬した。その後、腐食作用によってめっきに生ずる孔を観察し、1cm2の範囲に肉眼で見られた孔の数を数えた。実施例4〜実施例7のいずれの電池においても孔の数は3以下であった。また、実施例8ではまったく孔が見つからなかった。
試験1と同様に、実施例3と実施例6の電池について、電解液注液後、充電を行わずに、環境温度50℃、相対湿度90%以上の雰囲気下で10日間放置した。また、実施例5と実施例10の電池を、同様に7日間放置した。
2 亜鉛めっき層
3 ニッケルめっき層
4 電池缶
5 正極集電リング
6 負極集電リング
7 上蓋(金属製電池蓋)
8 開弁
9 電極群
10 軸芯
Claims (6)
- 金属製の電池缶と、金属製の電池蓋とがかしめられ、電解液を保持する電池容器を有し、非水電解液を用いる二次電池において、
電池缶は、非水電解液側から、ニッケル層,鋼板,亜鉛層,ニッケル層の層構造を有することを特徴とする二次電池。 - 請求項1に記載された二次電池であって、前記亜鉛層の代わりにアルミニウム層、又は亜鉛とアルミニウムの混合層を有することを特徴とする二次電池。
- 請求項1に記載された二次電池であって、前記電池缶は最外層に樹脂膜を有することを特徴とする二次電池。
- 請求項1に記載された二次電池であって、前記二次電池がリチウムを含有する電解液を用いるリチウム二次電池であることを特徴とする二次電池。
- 請求項1に記載された二次電池であって、前記鋼板の厚さが0.2mmから2mm、ニッケルめっきの厚さが1μmから5μm、亜鉛めっきの厚さが3μmから20μmであることを特徴とする二次電池。
- 請求項1に記載された二次電池であって、前記電池缶と前記電池蓋とは、絶縁体を介してかしめられた構造を有することを特徴とする二次電池。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009083971A JP5250466B2 (ja) | 2009-03-31 | 2009-03-31 | 非水電解液二次電池及びリチウム二次電池 |
PCT/JP2010/052184 WO2010113549A1 (ja) | 2009-03-31 | 2010-02-15 | 非水電解液二次電池及びリチウム二次電池 |
Applications Claiming Priority (1)
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---|---|---|---|
JP2009083971A JP5250466B2 (ja) | 2009-03-31 | 2009-03-31 | 非水電解液二次電池及びリチウム二次電池 |
Publications (2)
Publication Number | Publication Date |
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JP2010238462A true JP2010238462A (ja) | 2010-10-21 |
JP5250466B2 JP5250466B2 (ja) | 2013-07-31 |
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JP2009083971A Expired - Fee Related JP5250466B2 (ja) | 2009-03-31 | 2009-03-31 | 非水電解液二次電池及びリチウム二次電池 |
Country Status (2)
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JP (1) | JP5250466B2 (ja) |
WO (1) | WO2010113549A1 (ja) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012133904A (ja) * | 2010-12-20 | 2012-07-12 | Hitachi Vehicle Energy Ltd | 二次電池 |
JP2014103026A (ja) * | 2012-11-21 | 2014-06-05 | Hitachi Vehicle Energy Ltd | 蓄電素子 |
KR20150069779A (ko) * | 2013-12-16 | 2015-06-24 | 주식회사 엘지화학 | 내식성이 향상된 전기화학소자 |
JP2015170395A (ja) * | 2014-03-05 | 2015-09-28 | 日立オートモティブシステムズ株式会社 | 円筒形二次電池 |
US9819017B2 (en) | 2014-08-06 | 2017-11-14 | Fdk Corporation | Sealed battery and battery jacket can |
KR20190007275A (ko) * | 2017-07-12 | 2019-01-22 | 주식회사 엘지화학 | 셀케이스 |
WO2020246519A1 (ja) * | 2019-06-05 | 2020-12-10 | セントラル硝子株式会社 | 非水電解液用容器、及び非水電解液の保存方法 |
US11217845B2 (en) | 2017-08-25 | 2022-01-04 | Murata Manufacturing Co., Ltd. | Battery, battery pack, electronic device, electric vehicle, power storage device, and electric power system |
WO2022070824A1 (ja) * | 2020-09-29 | 2022-04-07 | 株式会社村田製作所 | 二次電池、電子機器及び電動工具 |
WO2022075019A1 (ja) * | 2020-10-08 | 2022-04-14 | 株式会社村田製作所 | 二次電池、電子機器及び電動工具 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110739434A (zh) * | 2018-07-20 | 2020-01-31 | 宁德新能源科技有限公司 | 极耳、电芯以及电池 |
DE202022104195U1 (de) * | 2022-07-25 | 2022-08-02 | Wickeder Westfalenstahl Gmbh | Gehäuse für ein elektronisches Element, vorzugsweise eine Batteriezelle oder ein Kondensator |
Citations (5)
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JPH10208777A (ja) * | 1997-01-21 | 1998-08-07 | Sony Corp | 非水電解液二次電池 |
JPH11135079A (ja) * | 1997-08-29 | 1999-05-21 | Sumitomo Electric Ind Ltd | 二次電池用電槽缶 |
JP2000348691A (ja) * | 1999-06-01 | 2000-12-15 | Sony Corp | 非水電解質二次電池 |
JP2004103554A (ja) * | 2002-05-24 | 2004-04-02 | Matsushita Electric Ind Co Ltd | 非水電解液二次電池 |
JP2007087704A (ja) * | 2005-09-21 | 2007-04-05 | Hitachi Vehicle Energy Ltd | 非水電解液二次電池 |
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2009
- 2009-03-31 JP JP2009083971A patent/JP5250466B2/ja not_active Expired - Fee Related
-
2010
- 2010-02-15 WO PCT/JP2010/052184 patent/WO2010113549A1/ja active Application Filing
Patent Citations (5)
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JPH10208777A (ja) * | 1997-01-21 | 1998-08-07 | Sony Corp | 非水電解液二次電池 |
JPH11135079A (ja) * | 1997-08-29 | 1999-05-21 | Sumitomo Electric Ind Ltd | 二次電池用電槽缶 |
JP2000348691A (ja) * | 1999-06-01 | 2000-12-15 | Sony Corp | 非水電解質二次電池 |
JP2004103554A (ja) * | 2002-05-24 | 2004-04-02 | Matsushita Electric Ind Co Ltd | 非水電解液二次電池 |
JP2007087704A (ja) * | 2005-09-21 | 2007-04-05 | Hitachi Vehicle Energy Ltd | 非水電解液二次電池 |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012133904A (ja) * | 2010-12-20 | 2012-07-12 | Hitachi Vehicle Energy Ltd | 二次電池 |
JP2014103026A (ja) * | 2012-11-21 | 2014-06-05 | Hitachi Vehicle Energy Ltd | 蓄電素子 |
KR20150069779A (ko) * | 2013-12-16 | 2015-06-24 | 주식회사 엘지화학 | 내식성이 향상된 전기화학소자 |
KR101631250B1 (ko) * | 2013-12-16 | 2016-06-16 | 주식회사 엘지화학 | 내식성이 향상된 전기화학소자 |
JP2015170395A (ja) * | 2014-03-05 | 2015-09-28 | 日立オートモティブシステムズ株式会社 | 円筒形二次電池 |
US9819017B2 (en) | 2014-08-06 | 2017-11-14 | Fdk Corporation | Sealed battery and battery jacket can |
KR20190007275A (ko) * | 2017-07-12 | 2019-01-22 | 주식회사 엘지화학 | 셀케이스 |
KR102282412B1 (ko) * | 2017-07-12 | 2021-07-26 | 주식회사 엘지에너지솔루션 | 셀케이스 |
US11217845B2 (en) | 2017-08-25 | 2022-01-04 | Murata Manufacturing Co., Ltd. | Battery, battery pack, electronic device, electric vehicle, power storage device, and electric power system |
WO2020246519A1 (ja) * | 2019-06-05 | 2020-12-10 | セントラル硝子株式会社 | 非水電解液用容器、及び非水電解液の保存方法 |
WO2022070824A1 (ja) * | 2020-09-29 | 2022-04-07 | 株式会社村田製作所 | 二次電池、電子機器及び電動工具 |
JP7420280B2 (ja) | 2020-09-29 | 2024-01-23 | 株式会社村田製作所 | 二次電池、電子機器及び電動工具 |
WO2022075019A1 (ja) * | 2020-10-08 | 2022-04-14 | 株式会社村田製作所 | 二次電池、電子機器及び電動工具 |
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