| 摘要 |
Provided is a charging method of a secondary battery capable of reducing the irreversible quantity in initial charge and discharge cycles after production of the battery and improving charge and discharge cycle characteristics. The secondary battery is at least comprised of an anode, a cathode, and an electrolyte and has a curve of anode potential or cathode potential against storage quantity, or an open-circuit voltage curve against storage quantity with inflection points. A charging operation of the secondary battery is carried out in a predetermined wave form at least until the inflection point. After passing the inflection point, until a fully charged state is achieved, the charging is performed in a different pattern from that before the inflection point.
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