Diagnosis method for state-of-health of batteries

Details Diagnosis method for state-of-health of batteries Diagnosis method for state-of-health of batteries

2007-01-22

2008-11-04

Berhane, Adolf (Department: 2838)

Electricity: battery or capacitor charging or discharging

Battery or cell charging

Time control

C320S161000, C324S427000

Reexamination Certificate

active

07446510

ABSTRACT:
A diagnosis method for SOH of batteries includes the steps of: providing data of discharge voltages and currents of a battery unit; setting an acceptable value of a predetermined period of time and an acceptable range of variation rate of discharge current for the battery unit; calculating variation rates of discharge voltages and currents of the battery unit within the predetermined period of time by using the data of discharge voltages and currents; recording the data of discharge voltages and currents of the batteries and variation rates thereof; comparing the data of discharge voltages of the batteries and the variation rates thereof if the variation rates of discharge current are fallen within the acceptable range of current variation with selected reference data; and converting results of compared data of discharge voltages of the battery unit and the variation rates thereof into a SOH index.

REFERENCES:
patent: 6362601 (2002-03-01), Finger
patent: 6668247 (2003-12-01), Singh et al.
patent: 7019542 (2006-03-01), Tinnemeyer
patent: 7051008 (2006-05-01), Singh et al.
patent: 7199557 (2007-04-01), Anbuky et al.

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