High-power battery charger and control method thereof

The invention discloses a high-power battery charger and a control method thereof. The charger comprises a control panel, a charging circuit and a control circuit, wherein the charging circuit comprises a voltage input terminal, a half-bridge upper switching tube, a half-bridge lower switching tube and a transformer, a primary side coil of the transformer, a primary side resonant inductor and a primary side resonant capacitor are connected in series between the S pole and the D pole of the half-bridge lower switching tube; a first secondary-side coil and a second secondary-side coil of the transformer are connected in series, free ends of the first secondary-side coil and the second secondary-side coil are respectively connected with the D pole of a first rectification switch tube and the D pole of a second rectification switch tube, the S poles of the two rectification switch tubes are connected with each other, and the D pole of the first rectification switch tube and the D pole of the second rectification