UPS battery capacity analysis

UPS battery capacity analysis When choosing a UPS manufacturer to equip batteries, the planning ability is not completely satisfactory, and even the power capacity and time requirements of the entire load power supply, but after the UPS is put into operation, users often find the power practice of the UPS power supply without power failure time value Far below the plan, the reason for this phenomenon, in most cases is not from the idle production of the battery, but the capacity of the battery has not been exhausted. There are many reasons for the decrease in the actual capacity of the battery, such as the quality of the battery, but more of it is the problem of use and maintenance. During the processing of the battery capacity, the lead-acid battery plate is charged to the opposite plate, the lead on the plate enters the lead dioxide, and the lead on the negative plate becomes a sponge, but the manufacturer's plate time is limited, not all materials All can be converted into active substances. Therefore, the qualified new battery according to the national standard can reach 90% capacity. Only in the following daily use, it can gradually reach the normal capacity. After two years, the equipment requirement reaches 100%. For example, one of the typical standards for small batteries used in UPS power supplies is l2V, 6Ah/2Ohv, which means that the output DC voltage is l2V, the nominal capacity is 6Ah, and the discharge rate is 20hr. The battery pack with an output DC voltage of 12V is discharged at a constant discharge rate of 20H. When the output voltage drops from l2V to l0.5v, the total safety hours measured are 6Ah. The 10-hour rate (marked as C10) is selected for industrial batteries in my country, Japan, and Germany, and the 8-hour rate (marked as C8,) is the standard for industrial batteries in the United States. In practice, the displacement is not equal to the displacement of the standard capacity rule. When the actual displacement is greater than the displacement of the nominal capacity rule, the actual output capacity is less than the nominal capacity. my country's electricity, post and telecommunications standards stipulate that a 10-hour rate battery is discharged at a 1-hour rate, and its capacity is 55% of the nominal capacity, which is 0.55c10. Japanese Industrial Standard 2V/10 hour battery, 1 hour battery capacity is 0.65c10, 6V, 12V, 10 hour battery, 1 hour battery capacity is 0.6c10. 20 hour battery 10 hours capacity is 0.93C20, 1 hour capacity is 0.56C20. Battery life can be expressed in two ways: one is deep cycle use, and the other is floating charge use of backup power battery. Deep cycled batteries are marked with the number of deep cycles. The battery life of 0.8c10 deep charge and discharge cycle is more than 1200 times that of the original, while the battery life of floating charge is 10-20 years. The battery can stop working as long as 80% of its capacity. The actual service life is very different from the planned service life, and it depends on the battery loss of water. Under the planning conditions, the application can reach the planned life. When the external conditions such as temperature, charging voltage, depth of discharge and other changes exceed the planned requirements, the actual application life will be much lower than the planned life, and the actual application ability will be lower than the planning ability . 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: How to charge a new lithium battery?