a) Keep the battery group for 1 hour from the system after full charge, adopt the
outer fake load connect method and proceed the discharge test at 10hours
discharging rate under the ambient temperature 25±5℃.
b) Terminal voltage, ambient temperature, time should be tested before
discharging.
c) Terminal voltage, discharging current, room temperature should be tested
and recorded during the discharging period. Testing interval is 1 hour,
discharging current must not exceed 1%of the stipulated data.
d) Terminal voltage of the battery and room temperature should be tested and
recorded during the discharging period. Test interval is 1 hour. They should
be tested at any moment at the final discharging period, so that to make
certain the time to reach the discharging end point voltage.
e) Discharging current multiplied by discharging time makes the capacity of the
battery. When battery discharge at 10hour discharging rate, if the
temperature is not 25℃, then it should be calculated according to the below
formula on the base of the capacity obtained in the test
Ce=Cr/﹛1+K(t-25℃)﹜------------------------(A)
In this formula, t refers to the temperature
K-refers to the temperature modulus (K=0.006/℃ when discharging at 10H
discharging rate, K=0.008/℃ when discharging rate is 3H. K=0.01/℃ when
discharging rate is 1H
f) Battery should be recharged by 1.2 times of the original after finishingd discharge.