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A comment on World’s largest battery maker announces major breakthrough in energy density. Parent comment

Re:World’s largest battery maker announces major breakthroug... by falcolas on Friday April 21, 2023 @11:42AM (#35655479)
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.

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Re:World’s largest battery maker announces major breakthroug... by gambiting on Friday April 21, 2023 @12:36PM (#35656291)
Sure but it's not about starter motors - these batteries power 400kW motors, that's a lot of power.
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Re:World’s largest battery maker announces major breakthroug... by rootusrootus on Friday April 21, 2023 @12:55PM (#35656609)
That'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.
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Re:World’s largest battery maker announces major breakthroug... by gertlex on Friday April 21, 2023 @09:48PM (#35662540)
Honest question, though: does "Turning over an engine" (as an earlier commenter typed) have actual meaning for an EV?
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Re:World’s largest battery maker announces major breakthroug... by MobiusHorizons on Saturday April 22, 2023 @12:08AM (#35663257)
No, 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.
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