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How to maintain UPS uninterruptible power supply battery

How to maintain UPS uninterruptible power supply battery

2022-12-16 10:15

The battery is an important part of the UPS uninterruptible power supply system. Reasonable maintenance of the battery can reduce the decay speed of the battery, increase the service life of the battery, greatly reduce the frequency of battery replacement, and effectively save operating costs.

1. Maintaining a suitable ambient temperature can prolong the service life of the UPS battery
Generally speaking, the factor that affects the UPS uninterrupted battery life is the ambient temperature. Generally, the best ambient temperature required by battery manufacturers is between 20-25°C. Although the increase in temperature has improved the discharge capacity of the battery, the price paid is that the life of the battery is greatly shortened. As indicated by the test outcomes, when the natural temperature is over 25℃, the life of UPS will be diminished significantly for every 10℃ of increment. At present, the batteries used in UPS are generally maintenance-free sealed lead-acid batteries, and the design life is generally 5 years, which can only be achieved under the environment required by the battery manufacturer. If it fails to meet the specified environmental requirements, its life span will vary greatly. In addition, the increase of the ambient temperature will lead to the enhancement of the internal chemical activity of the battery, thereby generating a large amount of heat energy, which will in turn increase the temperature of the surrounding environment. This vicious circle will accelerate the shortening of the battery life.

2. Regularly charge and discharge UPS uninterrupted battery
The floating charge voltage and discharge voltage in the UPS power supply have been adjusted to the rated value at the factory, and the discharge current increases with the increase of the load. The load should be adjusted reasonably during use, such as controlling electronic equipment such as a computer the number of units used. Under normal circumstances, the load should not exceed 60% of the rated load of the UPS. Within this range, the discharge current of the battery will not be over-discharged.

Because the UPS is connected to the mains for a long time, in an environment with high power supply quality and few occurrences of mains power outages, the battery will be in a floating charge state for a long time, which will lead to a decrease in the activity of the mutual conversion of chemical energy and electrical energy in the battery over time, and accelerate aging. And shorten the service life. Therefore, it should be fully discharged once every 2-3 months, and the discharge time can be determined according to the capacity of the battery and the size of the load. After a full load discharge, recharge for more than 8 hours according to the regulations.

3. Timely replacement of waste/bad UPS uninterruptible power supply batteries
At present, the number of storage batteries equipped with large and medium-sized UPS power supplies ranges from 3 to 80, or even more. These single batteries are connected through a circuit to form a battery pack to meet the needs of UPS DC power supply. In the continuous operation and use of UPS, due to the difference in performance and quality, it is inevitable that the performance of individual batteries will decline, and the storage capacity will not meet the requirements and be damaged. When some/some batteries in the battery pack are damaged, maintenance personnel should check and test each battery to exclude damaged batteries. When replacing a new battery, you should try to buy the same type of battery from the same manufacturer, and it is forbidden to mix acid-proof batteries, sealed batteries, and batteries of different specifications.

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