Re:Solid-state EV batteries now face "production hell"
by galangalalgol on Sunday January 28, 2024 @11:15AM
(#39167051)
If we are just using it as a generator, a turbine engine makes more sense. Very efficient at fixed rpm. Many trains use that sort of hybrid setup. But if you put in enough battery to warm up a small proane fuel cell to warm up a larger propane fuel cell you could just fill up at the propane pump and still get battery efficiencies but with a lightening tank. And they think they have propane generation from environmental co2 over 90% efficient now too.
Re:Solid-state EV batteries now face "production hell"
by pi-e-sigma on Sunday January 28, 2024 @03:29PM
(#39169511)
Turbine in a car is completely impractical. Some tanks, like M1 Abrams use a turbine and they are painfully loud and the exhaust is so hot it can literally set on fire anything too close to it. Imagine sitting in a traffic jam and lighting up a car behind you :)
The new 2023 model year Serena from Nissan uses a generator optimized engine in a series hybrid setup. The engine runs at a fixed rpm (except in extreme situations like accelerating a bunch on the highway going from 110 to 140) then it switches to a second higher rpm mode. I bought one, it's a lot of fun to manage the engines heat and battery room. My record is 38km per liter using local driving up and down our hilly community. Pretty incredible when you consider hills are the natural enemy to none hybrid millage.
The car accelerates like an EV. And with Japan's expensive electricity I'm paying only about double the millage cost of an EV. Despite the full size minivan costing us about 20k USD new.
Most hybrids, and all Toyota ones, are not using a special fixed rpm engines. They use a regular motor with different timings. The Nissan fixed rpm engine is actually less powerful than the electric motor powering the wheels. Thus at max acceleration you can deplete the battery faster than it is charged.