Gdetrailer wrote:
pianotuna wrote:
Gdetrailer wrote:
No matter what "batteries" you use, they all need to be recharged as soon as possible, Lithiums are not immune to this and are not an exception if you want to get the most life for the money you spend.
I thought this was there main claim to fame???
Lithiums do a much better job than FLA, AGM or gel, but they are not 100% immune to some degradation if you continually allow them to sit in a partial discharge.
Some of the claim to fame is the not to charge to 100% in order to store them. Reality is you don't really control the charge, the BMS does that. Allow them to store at too low of a charge and you take a chance the BMS will disconnect (BMS has low voltage disconnect built in and most BMS once that is tripped are not able to be reconnected) and now you have an expensive door stop. The Lithium battery pack will have a bit more capacity built in, often about 10% more capacity, but you typically cannot use that capacity due to BMS. The BMS stops you from charging or discharging more than 90% of the battery, good quality BMS will prevent you from using more that extra capacity. Basically that extra capacity is reserved for the BMS and also not allow battery to fall out of normal and stable state of charge range.
I have had some small Lithium batteries swell after being stored in a partial discharge state (inactive for 6 months or more and were not charged until the BMS stopped charging before storing).
The bms is the safe guard for the battery or more likely the cells within the battery.
A properly setup system has the charging device set to stop charging before the bms needs to interact. That's like saying my emergency brakes stop my truck no need to use the brake pedal while operating the truck.
LVD is also part of the bms which does protect the cells/ battery what quality battery manufacturer doesn't allow charging to wake the bms up when it meets their parameters?
Why buy a lfp battery if you're just going to store it, stay with dead lead and buy another cheap replacement when you kill it.
Small lithium batteries are not large lfp batteries, while your experience in lithium maybe useful my 6.5+ years seems to differ slightly using lfp setup fulltime everyday.
