Battery charging method for properly terminating rapid charge

Details Battery charging method for properly terminating rapid charge Battery charging method for properly terminating rapid charge

1997-09-29

1998-10-20

Tso, Edward

Electricity: battery or capacitor charging or discharging

Diverse charging or discharging rates for plural batteries

320150, H02J 704, H02J 706

Patent

active

058251596

ABSTRACT:
A trickle wait state (225) is included in a charging routine (200) prior to initiating any rapid charge of the battery (234). The wait state (225) allows the battery temperature (Rt) to reach equilibrium with the ambient temperature (214-224) before application of any rapid charge current to the battery so that .DELTA.T/.DELTA.t termination can be used, even in an uncontrolled temperature environment. The wait state (225) trickle charges (216) the battery for a time interval (218) and measures and stores the battery temperature before and after this time interval (214, 220). The battery continues to be trickle charged until the battery temperature reaches equilibrium with the temperature of the environment (222), at which time rapid charging (234) of the battery can commence.

REFERENCES:
patent: 5103156 (1992-04-01), Jones et al.
patent: 5241259 (1993-08-01), Patino et al.
patent: 5411816 (1995-05-01), Patino
patent: 5493199 (1996-02-01), Koenck et al.
patent: 5563494 (1996-10-01), Cuesta et al.

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