Electricity: battery or capacitor charging or discharging – Battery or cell discharging – With charging
Reexamination Certificate
2006-06-30
2009-11-10
Tso, Edward (Department: 2858)
Electricity: battery or capacitor charging or discharging
Battery or cell discharging
With charging
C320S133000, C320S134000, C324S429000, C324S431000, C340S636100, C340S636210, C702S063000, C702S064000
Reexamination Certificate
active
07615967
ABSTRACT:
Disclosed is a method and apparatus of estimating a state of health (SOH) of a battery using internal resistance, which has been found to act as a parameter exerting the greatest influence on the SOH of the battery. The method comprises the steps of: storing an SOH estimation table constructing SOH values corresponding to various values of internal resistance according to temperature and a state of charge (SOC) in a memory; performing measurement of the temperature and estimation of the SOC of the battery when a request is made to estimate the SOH; detecting the internal resistance value of the battery; and reading the SOH values corresponding to the measured temperature, the estimated SOC of the battery, and the detected internal resistance value of the battery from the SOH estimation table.
REFERENCES:
patent: 6157169 (2000-12-01), Lee
patent: 6469512 (2002-10-01), Singh et al.
patent: 6668247 (2003-12-01), Singh et al.
Cho Il
Jung Do Yang
Kim Do Youn
Cantor & Colburn LLP
Fantu Yalkew
LG Chem Ltd.
Tso Edward
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