goatman
10 MW
im looking at batteries, why aren't people testing the life cycle of batteries at the cells 100% discharge rate capacity. isn't that when a cell is operating exactly the way its designed to?
LuboN said:I am sorry to inform You that You got it totally wrong. Please read some battery life related threads to get the basics right first.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the cell at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods will affect cell longevity reliability.
That is the only true statement in that post.goatman said:stresses can be many things
goatman said:I think I see the confusion I created
take a 40T at a 10 amp discharge rate it has 100% discharge capacity
im not saying discharge the battery of all its 100% capacity
im saying discharge the cell at 10 amps
if you want to start at 4.1v and end at 3.5v, good, but do it at 10amps
goatman said:52v luna wolf pack battery 14s4p
2 battery options lg mj1 and 30q
recommend if requesting 50amp bms use 30q
4p of 30q is max 12.5 amps/cell for 50 amps
a 30q has a 100% discharge rate at 10 amps
does luna know something
theres a lot of mixed reviews of the 30q
OK, I understand what you mean better now, but again, I'm afraid no the opposite is also true in this case too!goatman said:I think I see the confusion I created
take a 40T at a 10 amp discharge rate it has 100% discharge capacity
im not saying discharge the battery of all its 100% capacity
im saying discharge the cell at 10 amps
if you want to start at 4.1v and end at 3.5v, good, but do it at 10amps
goatman said:the 30q has a 100% discharge rate at 10 amps and 5amps 97% and 15 amps 97%
if you run it at 15amps 97% it loses 60% of its capacity after 250 cycles
if you run a 30q at 5amps97% will it lose 60% of its capacity
I guess I need to find someone that has life cycled a 30q,40t or 25r 250 times at 10 amps to see what its capacity will be
I might be able to find a 30q at 3 amps wich should be disastrous