World’s largest battery maker announces major breakthrough in energy density

Re:World’s largest battery maker announces major breakthroug... by mrob on Friday April 21, 2023 @04:03AM (#35650972)

Gasoline internal combustion engines run at about 30% efficiency. Diesel does somewhat better at about 40% for car size engines, and about 50% for the really big ones. Electric motors easily exceed 90% efficiency. The EV wins even without regenerative breaking, even accounting for the losses in the batteries.

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Re:World’s largest battery maker announces major breakthroug... by fpoling on Friday April 21, 2023 @04:41AM (#35651206)

40% diesel efficiency is for optimal conditions, like steady cruise on a motorway. For practical driving it is less than 25%.

What is also missing here is that it takes 20-30% of energy to refine diesel or gasoline plus there is oil extraction cost. Accounting for that electrical car produces less CO2 when electricity comes from a modern coal plant than a diesel car.

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Re:World’s largest battery maker announces major breakthroug... by HPsquared on Friday April 21, 2023 @04:33AM (#35651146)

It's somewhat matched if the electricity is generated by combustion. Even then, if the power is generated using an efficient cycle (e.g. CCGT) the EV still tends to come out ahead.

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