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Calculation of the power capacity of the battery pack using the advanced cell model predictive techniques
Calculation of the power capacity of the battery pack using the advanced cell model predictive techniques
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机译:使用先进的电池模型预测技术计算电池组的功率容量
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摘要
The present invention relates to a method and an apparatus for estimating discharge and charge power of battery applications, including battery packs used in hybrid electric vehicles (HEV) and electric vehicles (EV). One charge/discharge power estimating method incorporates voltage, state-of-charge (SOC), power, and current design constraints and works for a user-specified prediction time horizon Deltat. At least two cell models are used in calculating maximum charge/discharge power based on voltage limits. The first is a simple cell model that uses a Taylor-series expansion to linearize the equation involved. The second is a more complex and accurate model that models cell dynamics in discrete-time state-space form. The cell model can incorporate an inputs such as temperature, resistance, capacity, etc. One advantage of using model-based approach is that the same model may be used in both Kalman-filtering to produce the SOC and the estimation of maximum charge/discharge current based on voltage limits.
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