Taking lithium manganate battery for cascade utilization as the experimental object

build a test platform for energy storage batteries

the effects of constant voltage charging voltage

constant current charging current

constant power charging and discharging

and ambient temperature on the capacity

internal resistance and voltage consistency of the battery pack were studied.The experimental results show that when the constant voltage cut-off voltage of single battery was set at 0.2 V higher than the battery charging platform voltage

a larger total charging capacity caned be obtained in less time; at the same cut-off voltage

the larger the constant current charging current led to less charging capacity and larger open circuit voltage difference; the static AC internal resistance was not affected by the change of charging current

while the battery capacity was mainly affected by the dynamic polarization internal resistance during charging; when the ambient temperature was from-10 ℃ to 20 ℃

the internal resistance and capacity of the battery were greatly affected by the temperature

when the ambient temperature was from 20 ℃ to 55 ℃

the change of the internal resistance tended to be flat.