4 ms·
It's not your average BMS that can support 500A cranking currents and horrifically noisy, unstable currents and voltages during charging. I wonder if crashworth
by plantain 5y ago
It's not your average BMS that can support 500A cranking currents and horrifically noisy, unstable currents and voltages during charging. I wonder if crashworthiness is a factor as well.
- elihu 5y agoI guess BMSs can vary in terms of what they do, but if it just has to monitor the voltages of the cells and bleed small amounts of current through a resistor if it needs to drop the voltage of one or more cells to keep them balanced, then it doesn't have to be all that complicated, nor handle very much current at a time. Crashworthiness might be a factor, though... lead acid batteries act sort of like a cushion in an impact, whereas lithium-ion batteries that break can cause worse problems than spilling sulfuric acid all over the engine bay.
- plantain 5y agoThat's if your only objective is balancing. Many BMS's go far beyond that, preventing the cells from being overloaded via excessive draw, short circuited, over charged etc.