A charge equalization apparatus, comprising: - a plurality of N battery cells (B1-BN) connected in series with each other; - a plurality of N transformers (T1-TN) corresponding to said battery cells (B1-BN), each transformer including: ∘ a primary winding (M11-M1N), the primary windings of all transformers (T1-TN) connected in parallel with each other, and ∘ a secondary winding (M21-M2N) connected in parallel with a corresponding battery cell (B1-BN); - a plurality of N first rectifier diodes (D11-DN1), each of which connected in series with a corresponding secondary winding (M21-M2N), respectively; wherein a positive terminal of the series-connected battery cells (B1-BN) is connected to a first end of the primary windings (M11-M1N); characterized in that the polarity of the primary windings (M11-M1N) of all of the transformers (T1-TN) is the same as that of the secondary windings (M21-M2N); and in that the charge equalization apparatus further comprises: - a plurality of N second rectifier diodes (D12-DN2), each of which connected in parallel with the series connection of the corresponding secondary winding (M21-M2N) and first rectifier diode (D11-DN1), and provided with its cathode connected to a cathode of the first rectifier diode (D11-DN1); - a plurality of N inductors (L1-LN), a first end of each inductor connected to cathodes of the corresponding first and second rectifier diodes (D11-DN1, D21-D2N) and a second end of each inductor connected to a corresponding positive battery cell terminal; - a switch connected in series to second ends of the parallel-connected primary windings (M11-M1N), thus configured to control a flow of current of the primary windings (M11-M1N); - a voltage sensing and switch drive signal generation unit configured to sense voltages of the battery cells (B1-BN) and to control the driving of the switch, and wherein the voltage sensing and switch drive signal generation unit is configured to charge the inductors (L1-LN) with the current of the secondary winding (M21-M2N) that is induced by turning on the switch, and is configured to charge the battery cells (B1-BN) with the charged inductors (L1-LN) by turning off the switch, on the basis of the sensed voltage of the battery cells (B1-BN). - a plurality of N battery cells (B1-BN) connected in series with each other; - a plurality of N transformers (T1-TN) corresponding to said battery cells (B1-BN), each transformer including: ∘ a primary winding (M11-M1N), the primary windings of all transformers (T1-TN) connected in parallel with each other, and ∘ a secondary winding (M21-M2N) connected in parallel with a corresponding battery cell (B1-BN); ∘ a primary winding (M11-M1N), the primary windings of all transformers (T1-TN) connected in parallel with each other, and ∘ a secondary winding (M21-M2N) connected in parallel with a corresponding battery cell (B1-BN); - a plurality of N first rectifier diodes (D11-DN1), each of which connected in series with a corresponding secondary winding (M21-M2N), respectively; wherein a positive terminal of the series-connected battery cells (B1-BN) is connected to a first end of the primary windings (M11-M1N); characterized in that the polarity of the primary windings (M11-M1N) of all of the transformers (T1-TN) is the same as that of the secondary windings (M21-M2N); and in that the charge equalization apparatus further comprises: - a plurality of N second rectifier diodes (D12-DN2), each of which connected in parallel with the series connection of the corresponding secondary winding (M21-M2N) and first rectifier diode (D11-DN1), and provided with its cathode connected to a cathode of the first rectifier diode (D11-DN1); - a plurality of N inductors (L1-LN), a first end of each inductor connected to cathodes of the corresponding first and second rectifier diodes (D11-DN1, D21-D2N) and a second end of each inductor connected to a corresponding positive battery cell terminal; - a switch connected in series to second ends of the parallel-connected primary windings (M11-M1N), thus configured to control a flow of current of the primary windings (M11-M1N); - a voltage sensing and switch drive signal generation unit configured to sense voltages of the battery cells (B1-BN) and to control the driving of the switch, and - a plurality of N second rectifier diodes (D12-DN2), each of which connected in parallel with the series connection of the corresponding secondary winding (M21-M2N) and first rectifier diode (D11-DN1), and provided with its cathode connected to a cathode of the first rectifier diode (D11-DN1); - a plurality of N inductors (L1-LN), a first end of each inductor connected to cathodes of the corresponding first and second rectifier diodes (D11-DN1, D21-D2N) and a second end of each inductor connected to a corresponding positive battery cell terminal; - a switch connected in series to second ends of the parallel-connected primary windings (M11-M1N), thus configured to control a flow of current of the primary windings (M11-M1N); - a voltage sensing and switch drive signal generation unit configured to sense voltages of the battery cells (B1-BN) and to control the driving of the switch, and wherein the voltage sensing and switch drive signal generation unit is configured to charge the inductors (L1-LN) with the current of the secondary winding (M21-M2N) that is induced by turning on the switch, and is configured to charge the battery cells (B1-BN) with the charged inductors (L1-LN) by turning off the switch, on the basis of the sensed voltage of the battery cells (B1-BN).