Battery charging method

Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries

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Details

320 39, 320 22, 320 32, H01M 700, H01M 1044

Patent

active

056916205

ABSTRACT:
A voltage at the time of full charging of a battery being charged is set to be larger for a lithium ion battery than for a nickel cadmium battery. Charging of the battery is then carried out using a constant current circuit and a fixed voltage circuit. If the item being charged is a lithium ion battery, a current detection circuit detects when the charging current is less than a prescribed value, a control circuit switches off a switch and the charging is halted. If the item being charged is a nickel cadmium battery, a -.DELTA.V detection circuit detects when the terminal voltage for the battery becomes low (-.DELTA.V) and the charging is halted. Different types of batteries of the same shape can therefore be charged in the same charging equipment while damage to the batteries during the charging operation is prevented.

REFERENCES:
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patent: 5164652 (1992-11-01), Johnson et al.
patent: 5237259 (1993-08-01), Sanpei
patent: 5449998 (1995-09-01), Melnikov et al.
patent: 5459671 (1995-10-01), Duley
patent: 5477125 (1995-12-01), Ettel et al.
patent: 5489835 (1996-02-01), Stephens et al.
patent: 5493196 (1996-02-01), Feldstein
patent: 5510690 (1996-04-01), Tanaka et al.
patent: 5576608 (1996-11-01), Nagai et al.

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