Method of end of discharge voltage measurement for battery with estimation thereof
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United States of America Patent
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Issued Date -
Oct 25, 2007
app pub date -
Feb 5, 2007
filing date -
Feb 9, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method of determining the end of discharge voltage, EDV2 and EDV0 of a battery according to loading current therefrom and the environmental temperature is disclosed. The methods comprises following steps: firstly, charging the battery until it is full and then discharging at a constant current and a first temperature; then plotting the first discharging curve. The battery is then recharged and discharged as above but at a second temperature. And then a second discharging curve is plotted. After that two sets of EDV2 and EDV0 are found from the first and second discharging curve. The resulted known values are then substituted into two empirical equations which are two variables (one variable is discharging current and the other is a temperature dependent variable) empirical equations. Thereafter two equations can be used to obtain the EDV2 and EDV0 for any given temperature and discharge current.
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