METHOD FOR CHARGING LITHIUM-ION SECONDARY BATTERY

PROBLEM TO BE SOLVED: To provide a method for charging a lithium-ion secondary battery that realizes reduction in charging time and improves the service life characteristics of the charging and discharging cycle, at the same time. SOLUTION: In the method for charging the lithium-ion secondary batter...

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Bibliographische Detailangaben
Hauptverfasser:	NAKAI SEIYA, WAKABAYASHI DAIRIN, TANAKA RYOICHI
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY SYSTEMS FOR STORING ELECTRIC ENERGY
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for charging a lithium-ion secondary battery that realizes reduction in charging time and improves the service life characteristics of the charging and discharging cycle, at the same time. SOLUTION: In the method for charging the lithium-ion secondary battery where electrode group composed by winding a positive electrode and a negative electrode in which a lithium compound oxide with a layered crystal structure is used as a positive-electrode active material via a separator, and a non-aqueous electrolyte are housed in a battery case, a constant-current charging is performed repeatedly as constant current and voltage charging, the constant-current sequentially is diminished at each charging from initial charging and upper-limit voltage is made sequentially larger starting from the initial charging. COPYRIGHT: (C)2011,JPO&INPIT