OPzV Battery Operation Manual
9
Battery Capacity Test Method
If we can not confirm whether the long time storage batteries can be used again after the
cycle in chapter 3.3, capacity should be checked as follow:
1
Discharge batteries with constant current of 0.1C
10
(A);
2
During discharge, test battery voltage one by one once an hour. When the voltage
reaches 1.9V/cell, test the voltage once ten minutes in order to check and record discharge time of
each battery exactly, till the voltage reaches 1.80V/cell. Record time and calculate the capacity.
3
Stop discharging when all the battery voltages are below 1.80V/cell. Immediately
recharge the batteries for 16 hours with constant voltage of (2.35±0.02)V/cell and current limited of
0.15C
10
(A);
How to judge capacity: Compare actual capacity (actual capacity = discharge current in A
× discharge time in hour) with rated capacity. If actual capacity is more than 80% of rated
capacity, the battery can be used after recharging; If it is less than 80% of rated capacity, the
battery should be charged for 24 hours and be discharged for another time to test capacity, if
it is still less than 80% of rated capacity, then the battery already fails.
Charging Equipment and Tools
No
Tool
Explanation
Purpose
1
Battery Test Equipment
or Power System
If there is no Battery Test
Equipment, we can use
Power System instead of it.
Used to recharge and test
batteries
2
Multimeter
Precision: 5mV
Test battery voltage
3
Amperemeter
Precision: less than 3%
Test charge and discharge
current
4
Monkey spanner
Tightening the screws
5
Screwdriver
Prize up battery top cover
Attention Proceedings
Use battery testing equipment to recharge batteries, if there is no equipment, the power system
can be used. Pay attention to the parameter of charge and discharge.
In order to prevent accident occurs, a person should be on spot during recharging.
Battery terminals should be bright and clean. Check and clean terminals before connecting in
order to decrease contact resistance.
A circuit breaker must be stringed in the circuit to prevent battery from damaged because of
wrong connection.
Make sure all the screws tightened reliably, otherwise there will be spark and heat while closing
the circuit, this may cause battery burnt.
Pay attention to prevent short-circuit while connecting, all the tools should be insulating.
Strictly prohibit connect anode and cathode in reverse.
