A kind of bidirectional DC/DC charging unit and charge control method

The invention belongs to public transport technical fields, provide a kind of bidirectional DC/DC charging unit and charge control method, include pantograph, super capacitor group, power battery pack, electric machine controller and driving motor, pantograph is electrically connected with super capacitor group and is used to charge to super capacitor group, super capacitor group is electrically connected with driving motor after electric machine controller and is used to power to driving motor, is in series between super capacitor group and power battery pack for realizing the transmitted in both directions DC/DC converters of the energy between super capacitor group and power battery pack.The advantage of the invention is that with super capacitor group and power battery pack parallel powering, by and the booster action of power battery pack and super capacitor group become apparent, two kinds of accessory power supplys have complementary advantages, and reduce system cost, in turn ensure the rapidity and secure safety of charging control process.