LLC resonant converter and applications of same

A charging station comprising:

• at least one charging pole;
• each charging pole comprising at least one LLC resonant converter module, wherein each LLC resonant converter module comprises:
• a primary sub-circuit coupled to a direct-current (DC) input voltage;
• a first secondary sub-circuit and a second secondary sub-circuit;
• the primary sub-circuit comprising a resonant tank, the resonant tank comprising a combination of a resonant inductor, a resonant capacitor and a magnetizing inductor;
• a first transformer isolating the primary sub-circuit from the first secondary sub-circuit and comprising a corresponding predetermined number of turns;
• a second transformer isolating the primary sub-circuit from the second secondary sub-circuit and comprising a corresponding predetermined number of turns;
• the first and the second secondary sub-circuits being configurable in a series mode and a parallel mode by switching configurations of a plurality of transition switches;
• and
• the first and the second secondary sub-circuits providing an output charging voltage and an output charging current for charging an external device,
• wherein the primary sub-circuit of each LLC resonant converter module further comprises:
• a plurality of switches configured in a full-bridge topology;
• the resonant inductor connected in series with a parallel combination of a first resonant branch and a second resonant branch, the first resonant branch coupled to the first transformer, and the second resonant branch coupled to the second transformer;
• and
• the first resonant branch comprising a first resonant capacitor coupled to a first magnetizing inductor, and the second resonant branch comprising a second resonant capacitor coupled to a second magnetizing inductor, wherein each of the first resonant capacitor and the second resonant capacitor provides half a target resonant capacitance, and each of the first magnetizing inductor and the second magnetizing inductor provides twice a target magnetizing inductance;
• and
• wherein one or more electric vehicles are charged based on the output charging voltage of one or more LLC resonant converter modules.