A method of estimating a maximum power limit for a battery cell at a specified predicted time using an improved RC equivalent circuit battery model and based on a state of charge (SOC), temperature, and state of health (SOH) of the battery cell. The method includes determining peak and continuous current limits of the battery cell, predicting a peak voltage after a specified prediction time based on the peak current limits, determining a buffer value of the predicted peak voltage and temperatures of various battery components, setting a maximum current limit based on the buffer value, and determining a temperature of the battery cell based on the maximum current limit. A maximum voltage after a specified prediction time is predicted based on the maximum current limit, and a maximum power limit is determined based on the predicted maximum voltage and the maximum current limit.
一种使用改进的RC等效电路电池模型并基于电池单元的充电状态(SOC)、温度和健康状态(SOH)来估计电池单元在指定预测时间的最大功率限制的方法。该方法包括确定电池单元的峰值和连续电流限制,基于峰值电流限制在指定预测时间之后预测峰值电压,确定预测的峰值电压的缓冲值和各种电池部件的温度,基于缓冲值设置最大电流限制,基于最大电流限制预测指定预测时间之后的最大电压,以及基于预测的最大电压和最大电流限制确定最大功率限制。
Battery power limit estimation based on RC model
基于RC模型的电池功率限制估计
2022-09-09
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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