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A comment on Solid-State Battery Has 2x the Energy–and No Anode. Parent comment

Re:Solid-State Battery Has 2x the Energy–and No Anode by londons_explore on Friday March 31, 2023 @09:55AM (#35387217)
A lead acid battery is just a holdover from the way every car used to have one for the accessories, and unless you want to redesign all the accessories, it's easier to have a 12v-14v circuit just for that.

And before you say "oh, but they could just use a voltage converter from the high voltage battery", they need to consider that some accessories use hundreds of amps briefly (eg. the power steering - that makes for an expensive voltage converter), and the car still needs to operate lights and stuff while the high voltage battery is offline (eg. after an isolation fault).

For all of the above reasons, the lead acid battery is still there, even though a clean sheet design would never have one.

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Re:Solid-State Battery Has 2x the Energy–and No Anode by entropicdrifter on Friday March 31, 2023 @12:43PM (#35389690)
My Hyundai Ioniq hybrid has a 12v section of the Li-ion battery that can be charged off of the hybrid battery while the car is off with the press of a button so that the car never needs to be jump-started unless the entire hybrid battery is dead.
[ Parent | on HN ]