You didn't mention the chemistry, but all Lithium-Ion types prefer to spend their time as close to 50% as possible, and as they spend more time farther away from 50% (either very low or very high), the degradation rate increases and is multiplied by high temperature. The difference between 40-60% is hardly worth noting, but the difference from 90% to 100% is massive. It's ok to occasionally take your pack low or high, but try to minimize the time spent at either "end". In fact, I recommend charging to 100% 3-4 times a year, but do it right before you are planning a longer trip so the pack gets discharged right away. This helps the pack stay in balance and keeps the BMS properly calibrated on most EVs.
LFP also has this, but the degradation rate is much lower as compared to ternary. Lead-Acid is the opposite, it wants to stay as close to 100% as possible, and needs to complete a proper absorption phase to get it properly "full". (Floating won't do it!) Anything below 100% is causing sulphation, and it increases at high temps. You will notice all products with Lithium Ion are shipped around 50% to ensure a long shelf life. This is exactly how you should store them if not in use. Cooler is better, but avoid below freezing. On Mon, Oct 21, 2024 at 8:31 PM redscooter via EV <ev@lists.evdl.org> wrote: > When I run my battery low like 10% soc does it make a diifernece in > soh/over all life if I charge it right away 1 hr starting or it set > for days before charging? > _______________________________________________ > Address messages to ev@lists.evdl.org > No other addresses in TO and CC fields > HELP: http://www.evdl.org/help/ > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20241022/11ec02ac/attachment.htm> _______________________________________________ Address messages to ev@lists.evdl.org No other addresses in TO and CC fields HELP: http://www.evdl.org/help/
