Battery equalization circuit

The invention relates to a battery equalization circuit and realization method thereof. The battery equalization circuit comprises a battery pack, an inductor, an equalization control switch, and an equalization controller. The battery pack includes N signal batteries in series connection. The inductor is used for storing and releasing energy. The equalization control switch includes N+1 controllable switches. The equalization controller is used for detecting data of real-time voltages, currents, and SOCs and the like of the single batteries and carrying out processing, formulating an equalization control strategy, and controlling turning on and off the equalization control switch. According to the invention, the voltages or SOCs of the single batteries can be monitored in real time and single batteries needing equalization are determined, thereby realizing energy transferring between single batteries or between the single battery and the multi-section battery. Because not only the energy transferring between the high-energy single battery and the low-energy single battery can be realized to realize the effect of peak load shifting and but also energy transferring between the multi-section battery and the single battery is also can be realized, the provided battery equalization circuit has advantages of high equalization efficiency, low simple equalization circuit cost, and flexible and changeable equalization control strategies.