Discharging

Discharging Current Rate and Recommended turn off Voltage.

Discharging Current               Final Discharge Voltage, ( vpc )

Up to 0.1 CA                            1.75

0.11-0.17 CA                            1.70

0.18-0.25 CA                            1.67

0.26-0.6 CA                             1.60

3.0 CA                                     1.30

Above 3CA Refer for advice.

   The slowest practical rate of discharge for a lead acid battery is self-discharge. As the current is very low and the fully discharged voltage is high, i.e. the battery is flat at 2.00-2.03 vpc. Therefore a program of stock control must be introduced to ensure that batteries are recharged well before that voltage is reached.

Discharging temperature

1.The ambient temperature during discharge should be held within the range of 5 to 122℉(-15 to 50℃).

2.Low temperature (below 5℉,-15℃) may reduce the available capacity; and high temperature (over 122℉,50℃) may cause deformation of the battery case and damage the battery.

Effect of Temperature Upon Performance

The available capacity is affected by both temperature and discharge current as shown in figure 1.

Discharge current

For the best efficiency, discharge within the range of 0.05CA to 3CA.