3 ms·
Most batteries that run starters are not energy dense, they're typically standard lead acid batteries. FWIW, to provide the 225 amps (for a V8 starter motor) a
by falcolas 4y ago
Most batteries that run starters are not energy dense, they're typically standard lead acid batteries.
FWIW, to provide the 225 amps (for a V8 starter motor) a Tesla car battery would only need a discharge capability of 3C (1C being around 80 amps), which is within its rated capabilities. This is also for batteries which provide higher voltages, so I'm vastly overestimating the C rate required.
C is the unit for charge/discharge rates, and is based off the capacity of the battery.
- gambiting 4y agoSure but it's not about starter motors - these batteries power 400kW motors, that's a lot of power.
- rootusrootus 4y agoThat's why how much power an EV has is closely related to the size of the battery. 400kW from a 75kWh battery is a little over 5C.
- gertlex 4y agoHonest question, though: does "Turning over an engine" (as an earlier commenter typed) have actual meaning for an EV?
- MobiusHorizons 4y agoNo, it is referring to what the starter motor in an ICE vehicle does. It was most likely a misunderstanding, but it is more similar in that it pulls very high loads like a drone battery does.