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The battery dynamics are an interesting component of data logging that can be seen once plotted.I have plotted the battery voltage [in brown] and battery current [in the familiar green for energy sourced to the motors and blue regen sinked from the motors] vs time for a period that included some regen and harder acceleration. The scale ranges are provided to the left, and the value on the white vertical line is given as well.The battery voltage rose by close to 5 volts during the REGEN and fell by about 5V during 100A of discharge. This gives the internal resistance of a battery cell in discharge at under 1mOhm.
The battery dynamics are an interesting component of data logging that can be seen once plotted.
I have plotted the battery voltage [in brown] and battery current [in the familiar green for energy sourced to the motors and blue regen sinked from the motors] vs time for a period that included some regen and harder acceleration. The scale ranges are provided to the left, and the value on the white vertical line is given as well.
The battery voltage rose by close to 5 volts during the REGEN and fell by about 5V during 100A of discharge. This gives the internal resistance of a battery cell in discharge at under 1mOhm.
