Battery tester, a high-power, compact, and lightweight battery bank charge-discharge capacity testing device, features a user-friendly and intuitive human-machine interface that significantly reduces the workload of daily battery testing and maintenance, making it an ideal assistant for battery maintenance. Battery tester discharge test procedure:
(1) First, fully charge the battery.
(2) Adjust the electrolyte specific gravity to 1.215–1.220
(3) The electrolyte temperature should not be lower than 10°C or higher than 30°C.
(4) Measure the voltage, specific gravity, temperature of each cell, total battery voltage, and room temperature.
(5) Close the discharge resistor switch, monitor and adjust the discharge current value.
(6) Thereafter, check and measure the voltage, specific gravity, temperature of each battery, total voltage of the entire battery bank, and discharge current every hour.
Monitoring of discharge voltage during battery tester discharge testing
To prevent over-discharge of the battery, it is essential to closely monitor the battery’s limit voltage during discharge testing. Therefore, throughout the discharge process, the terminal voltage of each individual battery should be continuously measured and must not fall below its specified limit value. Measuring only the terminal voltage of each battery individually is time-consuming, and as discharge nears completion, the voltage drops rapidly, increasing the risk of over-discharge. Hence, in addition to monitoring the voltage of individual batteries, the total voltage of the entire battery bank should also be monitored simultaneously during discharge testing to prevent over-discharge.
To monitor the total voltage of the battery pack, first calculate the maximum allowable discharge voltage for the entire pack based on the discharge limit voltage of each individual battery. Then mark this calculated total voltage value on the discharge voltage meter. For example, if the battery pack consists of 55 cells, the total discharge limit voltage would be 1.8 × 55 = 99 volts. Therefore, a red line should be drawn at the 99-volt mark on the discharge voltage meter scale. When the total voltage approaches this red line, it indicates that either the voltage of each battery has reached its limit or some batteries have dropped below their minimum allowable voltage; in such cases, discharging should be stopped immediately.
During the discharge process of a battery bank, if most individual cells have not yet reached their voltage limit while some batteries have already dropped below this limit, discharging should be stopped immediately. Otherwise, those batteries whose voltage drops prematurely will suffer serious damage. Therefore, during discharge, it is essential to monitor the total voltage and simultaneously measure the terminal voltage of each battery, with both processes closely coordinated.
Post time: Jun-05-2026