A charge equalization apparatus, comprising: N first transformers (T1 - Tn) connected in parallel to N series-connected batteries (B1 - Bn), respectively, and adapted to decrease voltages of overcharged batteries among the N series-connected batteries (B1-Bn); a charge storage device (Cdump, Bat) for storing energy supplied from the transformers(T1-Tn); characterized in that it comprises: a second transformer for redistributing energy stored in the charge storage device (Cdump, Bat) to the N series-connected batteries (B1-Bn) a voltage detection and drive signal generation unit (20, 30) for detecting voltages of N respective series-connected batteries (B1-Bn), and for generating a first drive signal required to discharge energy from overcharged batteries, and a second drive signal required to supply the energy stored in the charge storage device (Cdump, Bat) to the second transformer, N discharge switches (SW1 - SWn) connected between second ends of primary windings of the N transformers (T1-Tn), and anodes of the N batteries (B1-Bn) respectively, and operated in response to the first drive signal; and N first semiconductor switching elements (D1 - Dn) respectively connected between first ends of the secondary windings of the N transformers (T1-Tn) and a cathode of the charge storage device; a redistribution switch connected between a second end of a primary winding of the second transformer and an anode of the charge storage device (Cdump, Bat) and operated in response to the second drive signal; and a second semiconductor switching element connected between a first end of a secondary winding of the second transformer and a cathode of a first battery of the N series-connected batteries (B1-Bn) N first transformers (T1 - Tn) connected in parallel to N series-connected batteries (B1 - Bn), respectively, and adapted to decrease voltages of overcharged batteries among the N series-connected batteries (B1-Bn); a charge storage device (Cdump, Bat) for storing energy supplied from the transformers(T1-Tn); characterized in that it comprises: a second transformer for redistributing energy stored in the charge storage device (Cdump, Bat) to the N series-connected batteries (B1-Bn) a voltage detection and drive signal generation unit (20, 30) for detecting voltages of N respective series-connected batteries (B1-Bn), and for generating a first drive signal required to discharge energy from overcharged batteries, and a second drive signal required to supply the energy stored in the charge storage device (Cdump, Bat) to the second transformer, N discharge switches (SW1 - SWn) connected between second ends of primary windings of the N transformers (T1-Tn), and anodes of the N batteries (B1-Bn) respectively, and operated in response to the first drive signal; and N first semiconductor switching elements (D1 - Dn) respectively connected between first ends of the secondary windings of the N transformers (T1-Tn) and a cathode of the charge storage device; a second transformer for redistributing energy stored in the charge storage device (Cdump, Bat) to the N series-connected batteries (B1-Bn) a voltage detection and drive signal generation unit (20, 30) for detecting voltages of N respective series-connected batteries (B1-Bn), and for generating a first drive signal required to discharge energy from overcharged batteries, and a second drive signal required to supply the energy stored in the charge storage device (Cdump, Bat) to the second transformer, N discharge switches (SW1 - SWn) connected between second ends of primary windings of the N transformers (T1-Tn), and anodes of the N batteries (B1-Bn) respectively, and operated in response to the first drive signal; and N first semiconductor switching elements (D1 - Dn) respectively connected between first ends of the secondary windings of the N transformers (T1-Tn) and a cathode of the charge storage device; a redistribution switch connected between a second end of a primary winding of the second transformer and an anode of the charge storage device (Cdump, Bat) and operated in response to the second drive signal; and a second semiconductor switching element connected between a first end of a secondary winding of the second transformer and a cathode of a first battery of the N series-connected batteries (B1-Bn)