Cell balancing device based on capacitor network, cascadable balanced battery pack and control method thereof

A cell balancing device based on a capacitor network, a cascadable balancing battery pack, and a control method thereof, used for battery pack balancing control, and the battery pack being composed of n battery units connected in series; the cell balancing device comprises: n half bridge circuits, each half bridge circuit being connected in parallel to two ends of a battery unit, the midpoint of each half bridge circuit being connected in parallel to a corresponding switch capacitor, and each half bridge circuit comprising two switch transistors connected in series; an energy storage capacitor network, comprising a basic energy storage capacitor network composed of n switch capacitors connected in series; a chain-type driving capacitor network, one end thereof being electrically connected to one of the half bridge circuits or the energy storage capacitor network, and the other end thereof being electrically connected to a drive pulse generator, and the drive pulse generator being electrically connected to the chain drive capacitor network; and a control logic circuit electrically connected to the battery pack, the drive pulse generator, and a master control panel. Using the present solution, the cell balancing device of the present application has excellent balancing effects, reliable performance, strong universality, and strong scalability.