A charge equalization apparatus, comprising: N transformers (T1, T2... Tn), each having a single primary winding and two secondary windings, the N transformers being respectively connected in parallel with N series-connected batteries (B1, B2... Bn) so as to charge batteries other than overcharged batteries with energy discharged from the overcharged batteries; first and second charging devices (C1, C2) connected in parallel with the N series-connected batteries (B1... Bn), wherein the first and second charging devices (C1, C2) are connected serially, the second ends of primary windings of the N transformers (T1... Tn) being connected in common to each other and are thus connected to a common node of the first charging device and the second charging device; first and second redistribution switches (CSW1, CSW2) connected in parallel with the N series-connected batteries (B1... Bn), and configured to supply a charge, supplied by the N series-connected batteries (B1... Bn), to the primary windings of the N transformers (T1... Tn), wherein the first and second redistribution switches (CSW1, CSW2) are connected serially; N charge/discharge control switching units (SW1, SW2... SWn) connected between a common node of the first and second redistribution switches (CSW1, CSW2) and first ends of the primary windings of the transformers so as to supply the charge, supplied by the N series-connected batteries (B1... Bn), to the primary windings of the N transformers; N first semiconductor switching devices (D11, D12... D1n) respectively connected between first ends of the first secondary windings of the N transformers (T1... Tn) and cathodes of the batteries (B1... Bn); N second semiconductor switching devices (D21, D22... D2n) respectively connected between second ends of the second secondary windings of the N transformers and the cathodes of the batteries; and a voltage detection and drive signal generation unit configured to detect voltages of respective N series-connected batteries, to generate a drive signal, required to drive the charge/discharge control switching units (SW1, SW2) and the redistribution switches (CSW1, CSW2), depending on detected voltages and to control driving of the charge/discharge control switching units (SW1, SWn) and the redistribution switches (CSW1, CSW2). N transformers (T1, T2... Tn), each having a single primary winding and two secondary windings, the N transformers being respectively connected in parallel with N series-connected batteries (B1, B2... Bn) so as to charge batteries other than overcharged batteries with energy discharged from the overcharged batteries; first and second charging devices (C1, C2) connected in parallel with the N series-connected batteries (B1... Bn), wherein the first and second charging devices (C1, C2) are connected serially, the second ends of primary windings of the N transformers (T1... Tn) being connected in common to each other and are thus connected to a common node of the first charging device and the second charging device; first and second redistribution switches (CSW1, CSW2) connected in parallel with the N series-connected batteries (B1... Bn), and configured to supply a charge, supplied by the N series-connected batteries (B1... Bn), to the primary windings of the N transformers (T1... Tn), wherein the first and second redistribution switches (CSW1, CSW2) are connected serially; N charge/discharge control switching units (SW1, SW2... SWn) connected between a common node of the first and second redistribution switches (CSW1, CSW2) and first ends of the primary windings of the transformers so as to supply the charge, supplied by the N series-connected batteries (B1... Bn), to the primary windings of the N transformers; N first semiconductor switching devices (D11, D12... D1n) respectively connected between first ends of the first secondary windings of the N transformers (T1... Tn) and cathodes of the batteries (B1... Bn); N second semiconductor switching devices (D21, D22... D2n) respectively connected between second ends of the second secondary windings of the N transformers and the cathodes of the batteries; and a voltage detection and drive signal generation unit configured to detect voltages of respective N series-connected batteries, to generate a drive signal, required to drive the charge/discharge control switching units (SW1, SW2) and the redistribution switches (CSW1, CSW2), depending on detected voltages and to control driving of the charge/discharge control switching units (SW1, SWn) and the redistribution switches (CSW1, CSW2).