Method of detecting residual capacity of secondary battery

Details Method of detecting residual capacity of secondary battery Method of detecting residual capacity of secondary battery

2005-07-19

2005-07-19

Hoff, Marc S. (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

C702S070000, C702S182000, C320S127000, C320S134000, C324S426000, C324S433000, C700S293000, C700S297000, C307S116000, C307S125000

Reexamination Certificate

active

06920404

ABSTRACT:
Correlations between a residual capacity of a secondary battery and 4 parameters of an internal resistance, temperature, a discharge current and one of an open circuit voltage and a discharge voltage of the secondary battery are previously determined and a contour map of the residual capacity and 2 of the parameters is made, for example. Then, at least 2 varying parameters selected from the 4 parameters are detected while the secondary battery is in use and collated with the correlations to estimate the residual capacity of the secondary battery.

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