Cell equalization method and device

The invention discloses a cell equalization method and a device; the method comprises the following step of determining whether to carry out electric quantity equalization process to a cell monomer or not according to presently collected voltage information of the cell monomer in a cell pack, wherein the equalization processing of the electric quantity refers to equalize the voltage of each cell monomer in the cell pack to a same value; if yes, equalization processing of electric quantity is carried out to the cell monomers according to the monomer position of the cell monomer and charge/discharge directions. The cell equalization method and device can solve the un-consistancy problem of the cell that the cell pack cannot be fully charged in charging and cannot be fully discharged in discharging, so the usage life of the cell pack is short; the method and device can further adjust the voltage of each cell monomer to a same equal value, so the electric quanity of the cell pack can be fully charged or used in usage, thereby improving usage life of the cell, and improving user experience of the user in the usage of the cell pack.