MotorTrend: Electric Vehicles Are Way, Way More Energy-Efficient Than Internal Combus
08-13-22, 08:24 PM
#31
the battery is small as the purpose is to assist rather than drive the car. That’s why in a PHEV like a RAV4 prime or a NX450h when it runs in hybrid mode (rather than EV only) with the bigger battery, fuel economy is not any better than the hybrid only model of the car.
Bigger battery does not benefit in any way apart from adding more weight!
Bigger battery does not benefit in any way apart from adding more weight!
08-13-22, 08:24 PM
#32
Lexus Champion
Thread Starter
And I can get 99.9 mpg on a long downhill grade in my 430.
I don't believe a vague 10 to 15 percent is accurate/typical overall. Not sure how you are calculating that. 4% at most is more likely. Don't believe for a second that added 22% back to the total like this suggests is anywhere even close. Way overstated. The best numbers I've seen is that it recaptures and reuses 70% of the kinetic energy. If it were 100% efficient, looks like you would need to be at full regen braking 22% of the time. Looks to me that you would have to be at full regen for about 31% of the time to be able to add the 22% back in legitimately. I can see where that is possible for a short period of time in a specific scenario, but I don't believe that is anywhere close to typical. Nobody is full braking one third of the time they are driving.
I don't believe a vague 10 to 15 percent is accurate/typical overall. Not sure how you are calculating that. 4% at most is more likely. Don't believe for a second that added 22% back to the total like this suggests is anywhere even close. Way overstated. The best numbers I've seen is that it recaptures and reuses 70% of the kinetic energy. If it were 100% efficient, looks like you would need to be at full regen braking 22% of the time. Looks to me that you would have to be at full regen for about 31% of the time to be able to add the 22% back in legitimately. I can see where that is possible for a short period of time in a specific scenario, but I don't believe that is anywhere close to typical. Nobody is full braking one third of the time they are driving.
08-13-22, 08:31 PM
#33
Lexus Champion
Bigger battery does not benefit in any way apart from adding more weight!
Don't get the purpose of splitting hairs over how much energy is recaptured, EVs already get 100+ MPGe even when they have 1000+ HP. How is that not a win?
08-13-22, 08:48 PM
#34
This is true, to add more detail the battery assist fills in the torque gap caused by the Atkinson cycle engine.
Then why does Toyota have plug-in hybrids?
Don't get the purpose of splitting hairs over how much energy is recaptured, EVs already get 100+ MPGe even when they have 1000+ HP. How is that not a win?
Then why does Toyota have plug-in hybrids?
Don't get the purpose of splitting hairs over how much energy is recaptured, EVs already get 100+ MPGe even when they have 1000+ HP. How is that not a win?
08-13-22, 08:54 PM
#35
Lexus Champion
It's funny how people suddenly find God and are concerned about the environment and slave labor when it comes to EV's. If you really do care about slave labor, don't buy clothes, iPhones, most smartphones and electronic items, or the many, many things we enjoy in life. And don't buy stuff from Walmart..most of what they sell comes from slave labor.
The materials in batteries are way too valuable to throw in dumps. Battery Packs are being specifically designed to be melted down as one unit, and there are already companies exploring ways of making it profitable
The materials in batteries are way too valuable to throw in dumps. Battery Packs are being specifically designed to be melted down as one unit, and there are already companies exploring ways of making it profitable
08-13-22, 09:00 PM
#36
Lexus Champion
Thread Starter
08-13-22, 09:20 PM
#37
Lexus Champion
I was shocked when I found it out when I was back in HS, just didn't sit right with me and is a main reason I have such an old phone.
08-14-22, 03:49 AM
#39
Super Moderator
See here:
08-14-22, 05:23 AM
#41
And then they use the 11% inefficiency number to extrapolate energy savings with other power. And listing the huge savings with hydro is a waste of time. Hydro only accounts for 5% of our generation, and there is no way we ever get close to the hydro generation numbers needed to realize those savings.
08-14-22, 05:42 AM
#42
And the math really is way more complicated. Everyone talks about emissions savings because the generation is at the plant. Well, if that is the start point for comparison, you have to take into account losses between the plant and the consumer, which is 7-15%. And going back even further than that, it gets even more complicated. Cost to transport gasoline to stations. Cost to get fuel to power plants. Tons of variables that make articles like this basically useless.
08-14-22, 11:51 AM
#44
Lexus Champion
Thread Starter
And then they use the 11% inefficiency number to extrapolate energy savings with other power. And listing the huge savings with hydro is a waste of time. Hydro only accounts for 5% of our generation, and there is no way we ever get close to the hydro generation numbers needed to realize those savings.