How to select the battery?

How to select according to capacity ●Know the output power of the UPS power supply, battery voltage, and how many batteries are packed into it. For example: For example, the customer UPS power supply power is 10KVA, the battery pack is 192V, and 16 12V batteries are connected in series. These materials are generally supplied by processing manufacturers, and the battery voltages of different manufacturers are not the same. ●Calculate the actual output power of the UPS power supply. UPS power x 0.7 u003d actual output power. At present, 98% of the UPS power supplies on the market have actual output power of 70% of the total power, and only a few of them can reach 80%. 10KVA×0.7u003d7KW (actual output power), 7KWu003d7000W. ●Calculate the total capacity of the battery pack (actual output power/battery voltage) × delay time u003d the total capacity of the battery pack (AH) The delay time is of course the customer knows best, for example, the delay time is 8 hours (7000W/192V) × 8H u003d291.67AH (total capacity of the battery pack). ●Battery selection here only uses conventional batteries as a reference. The conventional 12V battery specifications are: 12V17AH, 12A24AH, 12V38AH, 12V65AH, 12V100AH. The current known battery voltage is 192V, 192V/12Vu003d16, and a set of 16 batteries. Here is a problem to explain. The capacity of 16 batteries in series is equal to the capacity of one battery, but the voltage has increased. For example: 12V38AH×16u003d192V38AH (series battery pack capacity). According to the calculation result, the total capacity of the battery is 192V291.67AH. We take the integer as 192V300AH. I compare the maximum battery specification table to 100AH. To reach 300AH, three sets of 100AH u200bu200bbatteries are required. 300AH/100AHu003d3 groups×16 pieces (each group)u003d48 pieces (100AH u200bu200bbatteries). ●According to the calculation results, the real capacity required for a fully loaded battery requires 48 12V100AH u200bu200bbatteries. The actual battery capacity required is divided by 0.7, namely: 100AH/0.7u003d143AH, and the battery pack is 48 12V143AH. Why divide by 0.7, because the battery capacity is not 100%, generally 80%, 70%, and some manufacturers only have 60% capacity. In addition, the conversion efficiency of UPS power supply cannot be 100% when it is inverted, so some battery energy will be lost. But in actual configuration, it is rarely divided by 0.7. Why? Because UPS power supply is rarely used at full load, the load of UPS power supply generally ranges from 30% to 70% of the actual output power. 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 perform routine maintenance on electric vehicles?