发明名称 |
Battery SOC estimation with automatic correction |
摘要 |
An embodiment contemplates a method of determining a state-of-charge of a battery for a vehicle. (a) An OCV is measured for a current vehicle ignition startup after ignition off for at least eight hours. (b) An SOCOCV is determined for the current vehicle ignition startup. (c) An SOCOCV—est is determined for a current vehicle ignition startup. (d) A determination is made whether the difference in the SOCOCV for the current startup and the SOCOCVest for the current startup is less than a predefined error bound using. Steps (a)-(d) is performed in response to the difference being greater than the predefined error; otherwise, determining an ignition-off current for the current vehicle ignition startup as a function of the SOCOCV of the current vehicle ignition startup and previous vehicle ignition startup, and a SOC based on current integration over time. Determining an SOCest of the current vehicle ignition startup using the processor. |
申请公布号 |
US9108524(B2) |
申请公布日期 |
2015.08.18 |
申请号 |
US201314059751 |
申请日期 |
2013.10.22 |
申请人 |
GM GLOBAL TECHNOLOGY OPERATIONS LLC |
发明人 |
Zhang Yilu;Du Xinyu;Salman Mutasim A.;Huang Shuo |
分类号 |
B60L11/18;B60W20/00 |
主分类号 |
B60L11/18 |
代理机构 |
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代理人 |
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主权项 |
1. A method of determining a state-of-charge of a battery for a vehicle, the vehicle being in a charging state when the engine is operating and a non-charging state when the engine is not operating, the method comprising the steps of:
(a) measuring an open circuit voltage (OCV) for a current vehicle ignition startup using a voltmeter, wherein the current vehicle ignition start-up is performed after the vehicle is in the non-charging state for at least eight hours; (b) determining an open circuit voltage-based state of charge (SOCOCV) for the current vehicle ignition startup using the processor; (c) determining an estimated open circuit-based state of charge (SOCOCV—est) for a current vehicle ignition startup using the processor; (d) determining whether the difference in the SOCOCV for the current vehicle ignition startup and the SOCOCVest for the current vehicle ignition startup is less than a predefined error bound using the processor; (e) performing steps (a)-(d) in response to the difference being greater than the predefined error; otherwise, proceeding to step (f); (f) determining an ignition-off current for the current vehicle ignition startup as a function of the SOCOCV of the current vehicle ignition startup, an SOCOCV of a previous vehicle ignition startup, and a state-of-charge based on current integration over time using the processor technique; (g) determining an estimated state of charge (SOCest) of the current vehicle ignition startup using the processor; and (h) providing the SOCest to a vehicle subsystem for use in a vehicle operation where the battery state-of-charge is utilized. |
地址 |
Detroit MI US |