How to detect UPS battery capacity?

The battery is an important part of the UPS system, and its pros and cons are directly related to the reliability of the entire UPS system. No matter how advanced the UPS design is and how complete its functions are, once the battery fails, no matter how good the UPS is, it cannot provide uninterrupted power supply. Therefore, do not choose low-quality lead-acid batteries for the sake of cheapness. This will affect the reliability of the entire UPS system and cause greater losses. 1. Visual inspection Use visual inspection to check the appearance of UPS batteries for leakage, deformation, cracks, stains, corrosion, and loose nuts. 2. Capacity test method The main battery of UPS system is mostly lead-acid maintenance-free battery, and the single battery voltage is 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: ⑴ In the UPS battery power supply system, turn off the rectifier and allow the battery to directly supply power to the load carried by the UPS. The terminal voltage, temperature, specific gravity, room temperature and discharge time of each battery must be measured before and after the battery pack is discharged. Discharge up to 30% to 40% of the rated capacity. ⑵After the discharge is over, the battery should be charged. The charged power should be 1.2 times the discharged power. (3) Make the discharge curve according to the measured data and save it for comparison in the next test. Offline measurement method: After the battery pack is fully charged, leave the system to stand for 1 hour, and use an external (smart) dummy load under the condition of an ambient temperature of 25±?5°C, and use a 10-hour discharge rate for discharge test ZHCH516 Smart Battery discharge meter; the terminal voltage, ambient temperature, and time of the battery should be measured before the start of the discharge; the terminal voltage, discharge current, and indoor temperature of the battery should be measured and recorded during the discharge. The measurement interval is 1 hour, and the discharge current fluctuation should not exceed the specified value. 1%; the discharge current multiplied by the discharge time is the capacity of the battery pack. When the battery 360pifa.com discharges at a rate of 10 hours, if the temperature is not 25°C, the actual measured capacity should be converted into the capacity Ce at 25°C according to the following formula. Check discharge method: Check discharge method is 100% C deep discharge. It has the advantages of accurate and reliable capacity test. Therefore, it is still the most reliable method for testing UPS battery performance in the world. The check discharge method, namely the full discharge capacity test, is the most direct and reliable method to detect the battery capacity. Whether it is performed online or offline, a backup power supply must be set up as a preventive measure to ensure the safety of the system. But the discharge current accuracy, voltage accuracy, and timing accuracy are all exquisite. The commonly used battery capacity test method is to connect the battery to a load to discharge, according to a constant discharge rate, after the termination voltage, stop the discharge, calculate the product of the discharge time and the discharge current, you can get the battery capacity, the total In other words, the nuclear capacitance is discharged through the discharge meter. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: What is a lead-acid battery? Analysis of lead-acid battery charging methods