A Multi-mode Boost equalization circuit

Inhalt:
In order to speed up the adjustment of the state of charge (SOC) between the lithium battery packs of electric vehicles, an improvement is made on the basis of the traditional LC resonant circuit, and a multi-mode Boost circuit is designed. Through the capacitor in the Boost circuit, the voltage difference between the capacitor and the battery pack is increased, and a periodic resonant circuit is designed to realize that the number of battery energy transfers in a resonant cycle is increased from 1 to 2 times, which speeds up the energy of the battery pack Balanced speed. Use MATLAB for simulation analysis, compare the equalization speed of the multi-mode Boost equalization circuit and the traditional LC resonant equalization circuit, and use 2 1200mAH ternary lithium battery packs as the experimental battery module for verification and analysis. The analysis results show that the designed circuit equalization speed completes the equalization state at 0.025s, while the traditional LC harmonic circuit tends to level off at 0.025s, which fails to meet the equalization requirements. The circuit continues the advantages of the LC resonant circuit, and the MOS tube can work in zero-current switching mode to extend the battery life.