this post was submitted on 03 Jul 2023
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Technology
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This was a lab test so regenerative braking didn't factor, they just measured how much power they got from discharging the battery at full vs half load.
If you draw more power from a battery, you get more voltage drop. Voltage drop is a measure of the power lost (heat generated) within the battery and circuitry and it's the internal resistance of the battery plus circuitry multiplied by the amps drawn. More power = more amps = more losses. This is why higher power applications use higher voltage battery packs because higher voltages mean fewer amps and smaller losses (power = amps x volts).
This is a great little summary. I knew these principles but this puts 2 and 2 together nicely.