JP5938520B2 - 二次電池及びそれを製造する方法 - Google Patents
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- H—ELECTRICITY
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0565—Polymeric materials, e.g. gel-type or solid-type
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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
- H01M10/04—Construction or manufacture in general
- H01M10/0436—Small-sized flat cells or batteries for portable equipment
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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
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0566—Liquid materials
- H01M10/0567—Liquid materials characterised by the additives
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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
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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
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
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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
- 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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- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0085—Immobilising or gelification of electrolyte
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- 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
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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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49108—Electric battery cell making
- Y10T29/49115—Electric battery cell making including coating or impregnating
Description
二次電池は、一般に、電極組立体が電池ケースに収納された状態で液体状態の電解質、すなわち電解液が注入され、電池ケースが密封されて製造される。
図1及び図2を参照すれば、一般に、二次電池は、電極組立体10と電解液とを電池ケース20の内部空間に収容する形態で構成される。電極組立体10は、正極板と負極板とがセパレータを介在して配置された形態を有し、それぞれの正極板及び負極板には、電極タブ11が付着される。そして、このような電極タブ11は、電極リード12と連結された状態で、図面でVで示されたような電池ケース20の内部空間に収納される。しかし、通常、電極タブ11と電極リード12との連結は、それが占める空間を減らすため、図2に示されたようにV字状に曲がった状態で行なわれる。それ故に、電池ケース20の内部で電極タブ11と電極リード12との連結部分が占める空間VをV−フォーミングスペース(V−forming space)とも称する。
望ましくは、前記電池ケースの加熱及び冷却段階は、前記電池ケースに所定圧力が印加された状態で行なわれる。
更に望ましくは、前記電池ケースの冷却段階は、前記ポリマー溶液がゲル状態になるように行なわれる。
望ましくは、前記硬化したポリマー溶液は、前記電池ケースの内部で前記電極組立体の電極タブが突出した部分に充填される。
更に望ましくは、前記硬化したポリマー溶液は、前記電池ケースの内部で前記電極組立体の電極タブが突出した部分に充填される。
また、電極タブの破損時に、破損した電極タブが反対極性のタブまたは電極板と接触して内部短絡を起こすことを防止することができる。
従って、本発明によれば、二次電池の安全性を大きく向上させることができる。
図3及び図4を参照すれば、本発明による二次電池は、電極組立体100、電解液、電池ケース200、及び硬化したポリマー溶液300を含む。
前記電池ケース200は内部空間を備え、その内部空間に電極組立体100及び電解液を収納する。
但し、本発明は、このような電池ケース200の特定形態によって限定されず、金属材質の缶のような他の形態の電池ケース200を利用することもできる。
図5を参照すれば、本発明による二次電池を製造するためには、まず電解液にポリマー粒子を添加してポリマースラリーを用意する(S110)。ここで、ポリマースラリーとは、液体状態の電解液中にポリマー粒子が混合されている状態を意味する。
また、前記S130段階は、一般の電池製造工程で行なわれるエイジング(aging)工程と共に行うことができる。
また、このように製造した実施例による二次電池に対し、充放電過程で電圧を測定してその結果を実施例として図7に示した。
前記実施例で用意した電解液と同じ電解液を用意し、該電解液にポリマー粒子を添加せず、そのまま電極組立体が収納された電池ケースに注液した後、密封した。そして、電池ケースを85℃で2.5時間加熱してエイジング工程を行った後、常温で冷却させ、脱気及び再密封工程を経ることで、比較例による二次電池を製造した。
また、このように製造した比較例による二次電池に対し、前記実施例と同様に充放電過程で電圧を測定し、その結果を比較例として図7に示した。
Claims (7)
- 二次電池の製造方法であって、
電解液にポリマー粒子を添加してポリマースラリーを用意する段階と、
前記ポリマースラリーを電極組立体が収納された電池ケースに注液する段階と、
前記電池ケースを加熱してポリマースラリーをポリマー溶液に変換させる段階と、及び
前記電池ケースを冷却して前記ポリマー溶液を硬化させる段階を含んでなることを特徴とする、二次電池の製造方法。 - 前記電池ケースを加熱する段階及び前記電池ケースを冷却する段階が、前記電池ケースに所定圧力が印加された状態で行われることを特徴とする、請求項1に記載の二次電池の製造方法。
- 前記所定圧力の印加が、前記ポリマー溶液の少なくとも一部が前記電池ケース内部で前記電極組立体の電極タブが突出した部分に位置するように行われることを特徴とする、請求項2に記載の二次電池の製造方法。
- 前記電池ケースを加熱する段階が、前記ポリマースラリーをゾル状態のポリマー溶液に変換させることを特徴とする、請求項1〜3の何れか一項に記載の二次電池の製造方法。
- 前記電池ケースを冷却する段階が、前記ポリマー溶液をゲル状態にすることを特徴とする、請求項1〜4の何れか一項に記載の二次電池の製造方法。
- 前記ポリマー粒子が、ポリフッ化ビニリデン、ポリフッ化ビニリデン‐ヘキサフルオロプロピレンコポリマー、ポリフッ化ビニリデン‐トリクロロエチレンコポリマー、ポリアクリロニトリル、ポリメチルメタクリレート、スチレン‐ブタジエンゴム(SBR)、カルボキシメチルセルロース(CMC)のうちいずれか一つ以上を含むことを特徴とする、請求項1〜5の何れか一項に記載の二次電池の製造方法。
- 前記電池ケースが、パウチ型電池ケースであることを特徴とする、請求項1〜6の何れか一項に記載の二次電池の製造方法。
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KR10-2012-0056800 | 2012-05-29 | ||
KR20120056800 | 2012-05-29 | ||
PCT/KR2013/004720 WO2013180471A1 (ko) | 2012-05-29 | 2013-05-29 | 이차 전지 및 이를 제조하는 방법 |
KR10-2013-0061010 | 2013-05-29 | ||
KR1020130061010A KR101453781B1 (ko) | 2012-05-29 | 2013-05-29 | 이차 전지 및 이를 제조하는 방법 |
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JP2015519703A JP2015519703A (ja) | 2015-07-09 |
JP5938520B2 true JP5938520B2 (ja) | 2016-06-22 |
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US (1) | US9240574B2 (ja) |
EP (1) | EP2790259B1 (ja) |
JP (1) | JP5938520B2 (ja) |
KR (1) | KR101453781B1 (ja) |
CN (1) | CN104094465B (ja) |
WO (1) | WO2013180471A1 (ja) |
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KR102197996B1 (ko) * | 2014-05-20 | 2021-01-04 | 삼성에스디아이 주식회사 | 이차전지 제조방법 및 이에 따라 제조된 이차전지 |
KR102256294B1 (ko) * | 2014-07-14 | 2021-05-26 | 삼성에스디아이 주식회사 | 가요성 이차 전지 |
KR102222118B1 (ko) * | 2014-07-14 | 2021-03-03 | 삼성에스디아이 주식회사 | 가요성 이차 전지 |
KR20160105124A (ko) * | 2015-02-27 | 2016-09-06 | 주식회사 엘지화학 | 파우치형 이차전지 |
KR102446407B1 (ko) * | 2015-05-06 | 2022-09-22 | 삼성전자주식회사 | 이차전지용 셀 구조체 및 이를 포함하는 이차전지 |
KR102319238B1 (ko) | 2016-11-07 | 2021-10-28 | 삼성에스디아이 주식회사 | 이차 전지 |
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CN208226003U (zh) * | 2018-04-13 | 2018-12-11 | 宁德新能源科技有限公司 | 电池及其电子设备 |
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WO2023187498A1 (en) * | 2022-03-30 | 2023-10-05 | Medtronic, Inc. | Batteries and methods of making the same |
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- 2013-05-29 WO PCT/KR2013/004720 patent/WO2013180471A1/ko active Application Filing
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- 2013-05-29 JP JP2015511384A patent/JP5938520B2/ja active Active
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WO2013180471A1 (ko) | 2013-12-05 |
KR101453781B1 (ko) | 2014-10-22 |
EP2790259A4 (en) | 2015-09-02 |
EP2790259A1 (en) | 2014-10-15 |
JP2015519703A (ja) | 2015-07-09 |
KR20130133697A (ko) | 2013-12-09 |
CN104094465A (zh) | 2014-10-08 |
CN104094465B (zh) | 2016-09-21 |
US9240574B2 (en) | 2016-01-19 |
EP2790259B1 (en) | 2016-09-14 |
US20140170470A1 (en) | 2014-06-19 |
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