1. Maintain a suitable ambient temperature Generally sp […]
1. Maintain a suitable ambient temperature
Generally speaking, the major factor affecting battery life is ambient temperature. Generally, the best ambient temperature required by battery manufacturers is between 20-25°C. Although the increase in temperature improves the discharge capacity of the battery, the price paid is that the life of the battery is greatly shortened. According to tests, once the ambient temperature exceeds 25°C, the battery life will be shortened by half for every 10°C increase. At present, the batteries used in 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 the battery manufacturer. If the specified environmental requirements are not met, the life span will vary greatly. In addition, the increase in ambient temperature will increase the chemical activity inside the battery, thereby generating a large amount of heat energy, which in turn will increase the ambient temperature. This vicious cycle will accelerate the shortening of the battery's life.
2. Regularly charge and discharge
The float 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 microcomputers. The number of units used. Under normal circumstances, the load should not exceed 60% of the UPS rated load. Within this range, the battery discharge current will not be over-discharged.
Because UPS is connected to the mains for a long time, in an environment with high power supply quality and few mains blackouts, the battery will be in a floating charge state for a long time, which will lead to a decrease in the activity of the battery's chemical energy and electrical energy conversion and accelerate aging And shorten the service life. Therefore, it should be completely discharged every 2-3 months, and the discharge time can be determined according to the capacity and load of the battery. After a full-load discharge is completed, charge it for more than 8 hours as required.
3. Use the communication function
At present, the vast majority of large and medium UPSs have operational capabilities such as communication with microcomputers and program control. Install the corresponding software on the microcomputer, connect the UPS through the serial/parallel port, and run the program, you can use the microcomputer to communicate with the UPS. Generally, it has functions such as information query, parameter setting, timing setting, automatic shutdown and alarm. Through information query, you can obtain information such as mains input voltage, UPS output voltage, load utilization, battery capacity utilization, internal temperature and mains frequency; through parameter settings, you can set the basic characteristics of UPS, battery life and The battery runs out warning, etc. Through these intelligent operations, it greatly facilitates the use and management of the UPS power supply and its storage battery.
4. Replace the used/bad battery in time
At present, the number of batteries equipped with large and medium-sized UPS power supplies ranges from 3 to 80, or even more. These single batteries are connected by circuits 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 individual batteries will be damaged due to performance degradation and insufficient power storage capacity. When one/some batteries in the battery pack are damaged, the maintenance personnel should inspect and test each battery to eliminate the damaged battery. When replacing new batteries, you should try to buy batteries of the same manufacturer and the same model, and it is forbidden to mix acid-proof batteries, sealed batteries, and batteries of different specifications.