Analysis of APC UPS battery charging issues

Seven things to pay attention to when using APC UPS batteries

1.When float charging, please use a charging voltage of 2.275V/cell (set value at 20 ℃) for constant voltage charging or a current below 0.002CA for constant current charging. When the temperature is below 0℃ or above 40℃, it is necessary to correct the charging voltage. Starting from 20C, for every degree of change, the single cell voltage changes by -3mv.

2.During cyclic charging, the charging voltage is set at 2.40-2.50V per cell (set value at 20 ℃) for constant voltage charging. When charging at temperatures below 5℃ or above 35 ℃, starting at 20 ℃, adjust the charging voltage by -4mv/cell for each degree of change

3. The initial charging current should be controlled below 0.25CA.

4. The charging capacity is set to 100-120% of the discharging capacity, but when the ambient temperature is below 5℃, it is set to 120-130%.

5. The lower the temperature (below 5℃), the longer the charging end time, and the higher the temperature (above 35℃), the more prone it is to overcharging. Therefore, especially during cyclic use, it is better to charge within 5℃-30℃.

6. To prevent overcharging, try to install a charging timer or automatically switch to trickle charging mode,

7. When charging, the battery temperature should be controlled within the range of -15℃~+40℃.