发明名称 |
METHOD FOR DETERMINING STATE OF CHARGE OF A BATTERY BY MEASURING ITS OPEN CIRCUIT VOLTAGE |
摘要 |
A method (Fig. 1) for determining the state of charge (SOC) of a battery by measuring its open circuit voltage (OCV) either with the battery in a fully rested state of chemical and electrical equilibrium or an active state durin g a period in which the battery settles after charge or discharge is stopped. A first type algorithm (Fig. 4) is developed to correlate the OCV in a fully rested condition (OCVREST) to the state of charge at which that measurement is taken. A second type algorithm is developed that predicts a final settling O CV of a battery (OCVPRED), based on the set of parameters of OCV, rate of chang e of OCV, and battery case temperature, acquired during the settling period of a battery not at rest. To determine the SOC of a battery being tested that is in the fully settled state the measured OCVREST is applied to the first type algorithm (Fig. 4). To determine the SOC of a battery that has not fully settled, the data of the OCV, rate of change of OCV and battery temperature is applied to a second type algorithm to determine OCVPRED and the OCVPRED valu e is used in the first type algorithm to determine SOC.
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申请公布号 |
CA2446240(A1) |
申请公布日期 |
2002.11.14 |
申请号 |
CA20022446240 |
申请日期 |
2002.02.14 |
申请人 |
HONEYWELL INTERNATIONAL INC. |
发明人 |
SINGH, HARMOHAN;PALANISAMY, THIRUMALAI G.;HOENING, STEVEN |
分类号 |
G01R31/36;H01M10/48;H02J7/00;(IPC1-7):G01R31/36 |
主分类号 |
G01R31/36 |
代理机构 |
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