How to configure battery for UPS?

According to equipment power and delay requirements, make configuration methods. The longer the delay time, the greater the capacity or number of UPS battery packs configured. One of the batteries used by UPS depends on the voltage, depending on the input voltage of the UPS battery terminal, generally 120V and 240V, 120V means 10 sets of batteries in series, and 240V means 20 sets of batteries in series. Then look at how much power and time you need to load the UPS battery. Generally, when purchasing a UPS host, there is a load estimate, which is the power of the UPS to prepare the load. Generally, the power of the UPS host will be larger than this estimated power. Finally, consider the output time when the battery is used. The longer the time, the higher the power consumption and the larger the battery capacity required. Time multiplied by power to get kWh is the power consumption, and then divide this power consumption by the battery voltage to get the approximate capacity ampere hour of the battery. 1. The UPS main engine power selection is based on: power u003d load/power factor (usually 0.8) 2. The long-term battery configuration algorithm is as follows: Calculate the maximum discharge current value of the battery: Imaxu003dPcosф/(η*Ecritical*N ) Note: P→Nominal output power of UPS power supply; cosф→Output power factor of UPS power supply (usually 0.8 for industrial frequency machines); η→UPS inverter efficiency, generally 0.88~0.94 (can be taken in actual calculations) 0.9); E critical → critical discharge voltage of the battery pack (12V battery is about 10.5V, 2V battery is about 1.67V); N → the number of batteries in each group depends on the backup time of the selected UPS battery pack to find out what is needed The discharge rate value C of the battery pack is then calculated according to the nominal capacity of the battery packu003dImax/C. Due to the use of the lowest critical discharge voltage value of the E critical battery, it will lead to a situation where the ampere-hour capacity of the required UPS battery pack is too large. According to the relevant experience of the current use, the actual ampere-hour capacity of the battery pack can be calculated according to the following formula: actual battery capacity u003d nominal capacity of the battery pack * 0.8 Disclaimer: Some pictures and content of articles published on this site are from the Internet, if there is any infringement Please contact to delete the previous article: What are the components of the internal resistance of lithium batteries