Hyundai Nexo sets new world record 887.5 km travelled on single tank of hydrogen

Re:Hyundai Nexo sets new world record 887.5 km travelled on ... by SigmundA on Tuesday May 18, 2021 @01:41PM (#27198281)

Drag isn't the only thing in play. They both are driving below highway speeds, one more so than the other, I wish there was some data for a Tesla at 40 mph vs 25 or 48 to compare more directly the difference. The Tesla will have between 975 and 708km range at 40 mph the NEXO is 887km, I will make an assumption the Tesla is less, but how much less, is it "much" different?

What is the energy density delta between a HFCV and BEV currently?

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Re:Hyundai Nexo sets new world record 887.5 km travelled on ... by BombNullIsland on Wednesday May 19, 2021 @09:31AM (#27208293)

Doesn't matter much. Below about 80km/h rolling resistance is dominant.

>What is the energy density delta between a HFCV and BEV currently?

Depends on what you're counting. Mirai's fuel cell stack, composite overwrapped tank, additional underbody and rear impact crash protection, high pressure filling system, cooling and fan intake system, and lithium battery together masses well over 400kg. Also takes up a lot of cabin and cargo space necessitating a larger vehicle.

Tesla's new 4680 batteries form part of the vehicle's structure and add free torsional rigidity, and will weigh roughly the same as a fuel system for 600km range. I imagine in the compact they'll package it into the unused area under the rear seat in order to drop the floor which should help with CdA.

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