<
https://news.stanford.edu/stories/2024/12/existing-ev-batteries-may-last-up-to-40-longer-than-expected>
"The batteries of electric vehicles subject to the normal use of real-world
drivers – like heavy traffic, long highway trips, short city trips, and mostly
being parked – could last about a third longer than researchers have generally
forecast, according to a new study by scientists working in the SLAC-Stanford
Battery Center, a joint center between Stanford University’s Precourt Institute
for Energy and SLAC National Accelerator Laboratory. This suggests that the
owner of a typical EV may not need to replace the expensive battery pack or buy
a new car for several additional years.
Almost always, battery scientists and engineers have tested the cycle lives of
new battery designs in laboratories using a constant rate of discharge followed
by recharging. They repeat this cycle rapidly many times to learn quickly if a
new design is good or not for life expectancy, among other qualities.
This is not a good way to predict the life expectancy of EV batteries,
especially for people who own EVs for everyday commuting, according to the
study published Dec. 9 in
Nature Energy. While battery prices have plummeted
about 90% over the past 15 years, batteries still account for almost a third of
the price of a new EV. So, current and future EV commuters may be happy to
learn that many extra miles await them.
“We’ve not been testing EV batteries the right way,” said Simona Onori, senior
author and an associate professor of energy science and engineering in the
Stanford Doerr School of Sustainability. “To our surprise, real driving with
frequent acceleration, braking that charges the batteries a bit, stopping to
pop into a store, and letting the batteries rest for hours at a time, helps
batteries last longer than we had thought based on industry standard lab
tests.”"
Via Kenny Chaffin.
Cheers,
*** Xanni ***
--
mailto:xanni@xanadu.net Andrew Pam
http://xanadu.com.au/ Chief Scientist, Xanadu
https://glasswings.com.au/ Partner, Glass Wings
https://sericyb.com.au/ Manager, Serious Cybernetics
