With the improvement of the manufacturing level of the lithium battery industry, the consistency of lithium batteries has been greatly improved, but in actual use, due to the subtle differences of the single cells and environmental differences, the inconsistencies of lithium batteries will still be caused.

　　In order to reduce the impact of the inconsistency on the lithium battery pack, it is necessary to use an equalization circuit.

　　At present, there are mainly two kinds of solutions for balancing management of lithium battery packs: energy-consumption type and feedback type.

　　The energy-consumption type refers to providing a parallel branch for each single cell during charging, and shunting the excessively high voltage of the single cell, so as to achieve the purpose of power consumption.

　　The feedback type means that the deviation energy between the cells can be fed back to the battery pack or certain cells in the battery pack through the energy converter at any time.

　　The energy consumption balance scheme is the most common and mature. It has high stability and low cost, but the actual effect is not good. Because in the actual design, the effect of heat dissipation must be considered, and the equalizing current cannot be set very large. This can achieve good results on low-capacity lithium battery packs, but it cannot achieve the desired effect on large-capacity lithium battery packs.

　　The feedback-type equalization scheme theoretically does not consume energy, and realizes dynamic equilibrium while realizing efficient energy transfer. However, the feedback-based program control method is complicated, the manufacturing cost is high, and its stability has always been a pain point that the industry is difficult to solve.

　　A perfect balance management program for lithium batteries is of great benefit to lithium batteries.

　　Lithium-ion battery (LIB) has become the main energy storage solution in modern social life. Among them, lithium iron phosphate batteries are a perfect replacement for lead-acid batteries, and they are the first choice for grid-connected peak shaving, off-grid energy storage, photovoltaic energy storage, UPS, data center and other industries.