Analysis of UPS battery capacity test methods

Use visual inspection to check the appearance of UPS batteries for leakage, deformation, cracks, stains, corrosion, and loose nuts. 2. Capacity test method Most of the main batteries used in the UPS system are lead-acid maintenance-free batteries with a single battery voltage of 12V. In order to be able to grasp the approximate capacity of the battery pack at any time, it is necessary to conduct a check discharge test. The method is: In the UPS power supply system, turn off the rectifier (UPS input) and allow the battery to directly supply power to the load carried by the UPS. Before and after the battery pack is discharged, the terminal voltage, temperature, specific gravity, and room temperature soft discharge time of each battery must be measured. Discharge 30%-40% of the rated capacity and stop. After the discharge is completed, the battery should be charged, and the charged power should be 1.2 times the discharged power. According to the data recorded in the test, the discharge curve is drawn, and it is saved for comparison in the next test in the future. 3. Judgment of backward battery The terminal voltage of backward UPS battery is low when discharging, so the backward battery should be measured under the discharge condition. If the terminal voltage is the lowest in the three consecutive discharge cycles, it can be judged as backward in the group. battery. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.