The invention provides a multi-
monomer directly equalizing device and method of a series
battery pack, and relates to a monometer equalizing circuit of the series
battery pack. The multi-
monomer directly equalizing device and method of the series
battery pack solve the problems that direct
energy transfer between any two
energy storage monomers can not be achieved, the energy equalizing path is long and the energy equalizing efficiency is low according to an existing energy equalizing device between the
energy storage monomers. The series battery pack is formed by series connection of m+n
monomer batteries. The multi-monomer directly equalizing device comprises a
transformer and m+n bilateral switches, wherein the
transformer is provided with m+n windings, the first m
energy storage monomers in the series battery pack are used as the first group, and the last n energy storage monomers in the series battery pack are used as the second group; m coils in the m+n windings of the
transformer are in one-to-one correspondence with the m energy storage monomers in the first group respectively, and the rest of the n coils are in one-to-one correspondence with the n energy storage monomers in the second group respectively; the m+n windings share one
magnetic core, and the number of turns of the m+n windings is equal, so the energy
direct transfer between any two energy storage monomers can be achieved. The multi-monomer directly equalizing device and method can be applied to the field of energy equilibrium of the series energy storage monomers.