In the process of using the uninterruptible power supply system, people tend to regard the battery as maintenance free and ignore it. However, according to the data, due to the battery failure caused by UPS mainframe failure or abnormal working rate is about one third. Therefore, to strengthen the correct use and maintenance of UPS batteries, to extend the battery life, reduce the failure rate of UPS system, has more and more important significance. In addition to the regular brand battery, the following aspects should be used and maintained correctly:

一.Maintain appropriate ambient temperature:

The main factor that affects the battery life is the ambient temperature. The standard ambient temperature required by battery manufacturers is between 20-25℃. The increase in temperature increases the battery's ability to discharge, but at the cost of greatly shortening its life. According to the test, once the ambient temperature exceeds 25℃, the battery life will be shortened by half for every 10℃ increase. At present, the batteries used by UPS are generally maintenance-free sealed lead-acid batteries with a design life of 5 years, which can only be achieved under the environment required by battery manufacturers. Failure to meet specified environmental requirements makes a large difference in the length of life. In addition, the increase of ambient temperature will lead to increased chemical activity inside the battery, which will generate a lot of heat energy, which in turn will promote the rise of ambient temperature, which will accelerate the shortening of battery life.

二.Regular charging and discharging:

The floating charge voltage and discharge voltage in the UPS power supply have been adjusted to the rated value when they leave the factory, and the discharge current increases with the increase of the load. The load should be adjusted reasonably in use, such as the number of electronic devices such as microcomputer. In general, the load should not exceed 60% of the UPS rated load. Within this range, the battery's discharge current does not overdischarge.

Because UPS is connected with municipal power for a long time, in the use environment with high power supply quality and few municipal power outages, the battery will be in the state of floating charge for a long time, which will lead to the reduction of the activity of mutual conversion of chemical energy and electric energy of the battery, accelerate aging and shorten the service life. Therefore, generally every 2-3 months should be fully discharged, discharge time can be determined according to the capacity of the battery and load size. After a full load discharge, according to the provisions to charge more than 8 hours.

三.Using communication functions:

At present, most large and medium UPS are equipped with microcomputer communication and program control and other operational performance. Install corresponding software on microcomputer, connect UPS through serial/parallel port, run this program, can use microcomputer and UPS for communication. Generally has the information inquiry, the parameter setting, the timing setting, the automatic shutdown and the alarm and so on the function. Through the information query, the mains input voltage, UPS output voltage, load utilization rate, battery capacity utilization rate, in-machine temperature, mains frequency and other information can be obtained; Through parameter setting, the basic characteristics of UPS, battery life and battery run out alarm can be set. Through these intelligent operations, greatly facilitate the UPS power supply and its battery management.