How to calculate the capacity of UPS power battery

How to calculate the capacity of the UPS power battery 1. Calculation of the maximum discharge current of the battery The maximum discharge current of the battery is: Imax is the maximum discharge current of the battery (A); P is the rated output power (W); cosφ is the load power factor (for UPS systems, consider The cosφ output by the system, if it is a non-inverter system application, cosφu003d1); η is the efficiency; E critical is the critical discharge voltage of the single battery during discharge (the critical discharge voltage of the 12V battery is 10V); N is the battery pack The number of single batteries. 2. Calculation of discharge current. Because the discharge current of the UPS power battery changes during the discharge process, the current value of the battery when it is just discharged is obviously less than Imax. According to the discharge state of the battery, generally 0.75 is taken as the correction factor, which is the actual requirement of the battery. The discharge current Iu003d0.75Imax3. The UPS power supply battery capacity is calculated and the actual discharge current value of the battery is calculated, and then according to the required standby time, according to the battery discharge characteristic curve supplied by the battery manufacturer, find out which battery pack is required to supply The discharge rate is calculated by the following formula to calculate the battery capacity required to be configured. The actual UPS battery capacity to be configured is: C is the capacity of the battery pack to be configured; K is the safety factor, generally 1.25; I is the load current (5 years of development for 2V series batteries, and no development for 12V series); T is Discharge hours; n is the discharge capacity coefficient (the communication storage battery selects nu003d0.9, power nu003d0.95, UPS system nu003d1); t temperature adjustment coefficient. Batteries play an important and irreplaceable role in various UPSs. With the development of electrochemical technology, sealed valve-regulated lead-acid batteries occupy the vast majority of the power supply market. In UPS, 12V/40Ah combination sealed valve-controlled battery is mostly used. It is characterized by simple maintenance, no need to add water, small size, and safe and convenient use. 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: Precautions for the use of automotive lithium-ion power lithium battery packs and daily maintenance