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Method and device for measuring pure resistance of on-vehicle battery by periodically measuring a discharge current and terminal voltage while a rush current flows into a constant load
Method and device for measuring pure resistance of on-vehicle battery by periodically measuring a discharge current and terminal voltage while a rush current flows into a constant load
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机译:通过在冲击电流流入恒定负载时周期性地测量放电电流和端电压来测量车载电池的纯电阻的方法和装置
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摘要
A discharge current and terminal voltage of the battery are periodically measured while a rush current flows into a predetermined constant load of the loads. The rush current first monotonically increases from zero to a peak value and subsequently monotonically decreases from the peak value to a steady value. A first approximate expression of a current-voltage characteristic for the increasing discharge current and a second approximate expression of a current-voltage characteristic for the decreasing discharge current are computed. An intermediate value of two values of the terminal voltage change per unit current change at points corresponding to the peak values of the first and second approximate expressions excluding a voltage drop caused by a concentration polarization component is computed when the first and second approximate expressions include the voltage drop. The intermediate value computed is measured as the pure resistance of the battery.
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