Isn’t that incredibly wasteful in terms of space and materials? Why not just use a few large lithium ion cells?
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Batteries can only produce a small amount of voltage, maybe between 1-3 V depending on the battery. The actual voltage that you can get from the battery is significantly lower due to things like the certain parts of the electrochemical reaction being slow, etc. So even if the cell operates at a modest current, from P=IV the power output for the single cell will be pretty low. So you need to amass thousands of (if not more) cells to get enough power for your car and all its various systems. In order to use a few large cells, they would need to have ridiculously high voltages, but those reactions don’t exist as far as I know.
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