Apparatus and method for estimating state of healt

专利名称：Apparatus and method for estimating state

of health of battery based on batteryvoltage variation pattern

发明人：Jung-Soo Kang,Jee-Ho Kim,Ju-Young

Kim,Chang-Gi Jung

申请号：US12423922申请日：20090415公开号：US08046181B2公开日：20111025

专利附图：

摘要：An apparatus estimates SOH of a battery based on a battery voltage variation

pattern. A data storing unit obtains and stores battery voltage, current and temperaturedata from sensors, at each SOH estimation. A first SOC estimating unit estimates first SOCby current integration using the battery current data. A second SOC estimating unitestimates open-circuit voltage from the voltage variation pattern, and calculates andstores second SOC corresponding to the open-circuit voltage and temperature usingcorrelations between the open-circuit voltage/temperature and SOC. A weighted meanconvergence calculating unit calculates and stores convergence value for weighted meanvalue of ratio of the second SOC variation to the first SOC variation. A SOH estimating unitestimates capacity corresponding to the weighted mean convergence value usingcorrelation between the weighted mean convergence value and the capacity, estimatesrelative ratio of the estimated capacity to an initial capacity, and stores it as SOH.

申请人：Jung-Soo Kang,Jee-Ho Kim,Ju-Young Kim,Chang-Gi Jung

地址：Daejeon KR,Daejeon KR,Daejeon KR,Daejeon KR

国籍：KR,KR,KR,KR

代理机构：Birch, Stewart, Kolasch & Birch, LLP

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