Method for detecting fully charged condition of secondary batter

Details Method for detecting fully charged condition of secondary batter Method for detecting fully charged condition of secondary batter

1999-05-04

2000-11-07

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Battery or cell charging

Pulsed

320139, H02J 704

Patent

active

061441880

ABSTRACT:
The present invention provides a method for detecting a fully charged condition of a secondary battery by which the fully charged condition of a secondary battery can be detected accurately and deterioration in battery characteristic due to overcharging can be restrained irrespective of the charging mode and the surroundings, without the need for a special battery structure. In the method, pulse vibrations generated inside a secondary battery being charged are detected, and when the obtained characteristic value of the pulse vibrations, for example, incidence of generation of the vibrations reaches a predetermined value, the secondary battery is determined to be in fully charged condition.

REFERENCES:
patent: 5159272 (1992-10-01), Rao et al.
patent: 5345162 (1994-09-01), Shiojima
patent: 5576608 (1996-11-01), Nagai et al.

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