The difference between parallel and series UPS battery packs and a brief description of parallel and series circuits

What is the difference between UPS battery packs in parallel and in series? With the development of new energy, everyone will equip their equipment with one or more sets of UPS power supplies during construction. UPS is an uninterruptible power supply that contains energy storage devices. Constant voltage and constant frequency uninterruptible power supply with inverter as an important part. In use, in order to improve the operational reliability, several UPSs are often required to be connected redundantly. The redundant connection of UPS has two modes: series and parallel. UPS batteries are connected in parallel: the battery is connected to the positive and the negative to the negative, and they are connected side by side, the voltage remains the same, the capacity is increased, and the corresponding current is also increased, which can be used for capacity expansion. But not all UPSs can be connected in parallel. All batteries have different output impedances. Direct parallel connection is dangerous. It is best to use special parallel batteries. UPS batteries in series: The batteries are connected in series, that is, positive and negative, negative connected to positive, positive to negative, and so on. One of them is broken, and the other takes the initiative to supply power to ensure uninterrupted power. UPS battery pack.jpg UPS battery series circuit: 1. The current of the series circuit is equal everywhere: Itotalu003dI1u003dI2u003dI3u003du003dIn2. The total voltage of the series circuit is equal to the sum of voltages everywhere: Utotalu003dU1+U2+U3++ Un3. The equivalent resistance of the series resistance is equal to the sum of the resistances: Rtotalu003dR1+R2+R3++Rn4. The total power of the series circuit is equal to the sum of the powers: Ptotalu003dP1+P2+P3++Pn5. Series capacitor The reciprocal of the equivalent capacitance is equal to the sum of the reciprocal of the capacitance of each capacitor: 1/Ctotalu003d1/C1+1/C2++1/CnUPS battery parallel circuit: 1. The components in the combination have the same voltage: U1u003dU2u003dU3u003du003dUn2. The current flowing into the combined terminal is equal to the sum of the currents flowing through several components: Itotalu003dI1+I2+I3++In3, the equivalent resistance of the parallel resistance is equal to the sum of the reciprocal of the resistances ：1/Ru003d1/R1+1/R2+1/R3++1/Rn; 4. The total power of the parallel circuit is equal to the sum of each power: Ptotalu003dP1+P2+P3++Pn; 5. Parallel capacitor The equivalent capacitance is equal to the sum of the capacitance of each capacitor: C total u003d C1 + C2 + Cn; the parallel charging method is simple, but the power cannot be increased. Because the current of a single UPS battery is very large when the power is high, the requirements on the component circuit are very high. Therefore, many batteries with high power, such as above 1000W, are connected in series. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.