6 ms·
But the efficiency factor of an EV is 60% as opposed to 20% for an ICE, which means you can get a similar range with much lower energy density.
by aquafox 2y ago
But the efficiency factor of an EV is 60% as opposed to 20% for an ICE, which means you can get a similar range with much lower energy density.
- sedatk 2y ago…at the expense of door handles and good looking tires.
- bgnn 2y agoGasoline has 100x more energy density per kg than Lithium batteries. As you said EVs are 3x more efficient so per kg dofference is 33x. Electic motors are much more compact and lighter than ICEs but not enough to close the 33x gap for the same weight. Thus for a similar range EVs need to be heavier. My ICE car is 1300kg and it can drive ~1000km with a full tank of 62 liters.
- rrr_oh_man 2y agoThat sounds like a VW Passat B5...
- adolph 2y ago> Gasoline has 100x more energy density per kg than Lithium batteries. This is true and also misleading since much more of the energy stored in gasoline is unavailable for conversion to work relative to an electrical battery. Additionally, an electrical battery can absorb some of the vehicle's kinetic energy, which a vehicle with only an ICE cannot do. https://en.wikipedia.org/wiki/Gasoline_gallon_equivalent https://en.wikipedia.org/wiki/Gasoline_gallon_equivalent
- DannyBee 2y agoThat table says that 122kwh is only 4 gallons of gasoline. Most ICE cars that compare to an ev with a 122 kWh battery size hold 20 gallons of more. So still 5x energy density in the ICE vehicle Or am missing something?
- tadfisher 2y agoYes, 5x is more favorable than 33x as quoted by the GP.
- bgnn 2y agoSorry for unclarity. I wasn't comparing the weight if the total car in EV or ICE scenario. It's more like 2x for a similar range I would think, because EV drivetrain is so much lighter than ICE one.
- adolph 2y agoThat’s not “unclarity.” That’s “moving the goalposts.”
- DannyBee 2y agoSure, but this is pretty pedantic in practice - 5x is still a huge number. There is no practical difference between 5x and 30x and 1000x.
- tadfisher 2y agoExcept for an order of magnitude, sure. But you're not getting 5x range in ICE cars.
- adolph 2y ago5x is not 100x. Or am I missing something?