XPost: alt.energy.automobile, rec.autos.driving, alt.global-warming   
   From: noone@nospam.com   
      
   Στις 22/7/2023 9:54 μ.μ., ο/η Leroy N. Soetoro έγραψε:   
   > https://jalopnik.com/its-too-hot-for-evs-to-work-right-1850663950   
   >   
   > The heat wave affecting much of the U.S. may be causing electric vehicles   
   > to lose nearly a third of their range.   
   >   
   > We already knew electric vehicles don’t do so well when it gets really   
   > cold outside. Well, apparently they don’t really like extreme heat either.   
   > According to Automotive News, the recent heat wave across much of the   
   > Southern and Western U.S. has brought their range issue to the forefront.   
   >   
   > A Seattle-based EV battery and range analytics company called Recurrent   
   > has reportedly tested thousands of vehicles in various weather conditions.   
   > It found that many vehicles experienced “significant declines” in their   
   > range as temperatures rose. Some apparently suffered a 31 percent drop   
   > when temps got about 100 degrees Fahrenheit. That is less than ideal. At   
   > cooler temperatures, the outlet reports that the range loss wasn’t as   
   > high. There was an average of 5 percent reduction at 90 degrees and 2.8   
   > percent at 80, so it’s definitely not linear.   
   >   
   > Auto News says that in order to calculate these average temperatures,   
   > Recurrent used a blend of data from the 17,000 vehicles the company keeps   
   > track of. This data includes 65 EVs and plug-in hybrid models that include   
   > mainstays like Tesla’s entire lineup, the Chevy Bolt EV, Hyundai Konda,   
   > Nissan Leaf, Ford F-150 Lightning and Mustang Mach-E.   
   >   
   > Unfortunately, we don’t know which models did the worst in terms of range   
   > loss. However, Recurrent did say that all four of Tesla’s vehicles had the   
   > smallest range degradation, but they also had the widest gap between their   
   > real-world range and the EPA’s estimates. Part of the reason for their   
   > resistance to range loss may be because of their heat pumps, Recurrent’s   
   > CEO Scott Case told AutoNews. They’re apparently much more efficient at   
   > cooling than standard automotive air conditioners.   
   >   
   > The outlet also spoke with Greg Less, the technical director of the   
   > University of Michigan Battery Lab. He explained that range decline from   
   > heat has its roots in battery chemistry.   
   >   
   > “Once you’re above [104 degrees Fahrenheit] you start to have a breakdown   
   > of the passive emission layer on the anode, and that breakdown will then   
   > cause consumption of the liquid electrolyte, which will shorten the   
   > lifetime of your battery,” Less told the outlet.   
   >   
   > Luckily for EV owners, he doesn’t think the excessive heat will damage EV   
   > batteries long term. That’s because they aren’t always driven in 100+   
   > degree weather, and EVs have a fairly robust system to cool batteries.   
   >   
   >  From what Less says, it sounds like high temperatures aren’t the direct   
   > cause of range degradation. It’s got more to do with the fact they use   
   > more electricity to run stuff in that sort of weather.   
   >   
   > “You’re running the fan harder, you’re running the refrigerant faster.   
   All   
   > of these things take more electricity,” Less said to Auto News. “So   
   that’s   
   > going to reduce the range.”   
   >   
   > if the EVs are our best hope for the climate change, we're screwed!   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)