Patent ID: 8466658

Claim:
A charging system comprising: a first bi-directional conversion module; a second bi-directional conversion module; a DC interface coupled to the first bi-directional conversion module; an AC interface coupled to the second bi-directional conversion module; an isolation module coupled between the first bi-directional conversion module and the second bi-directional conversion module, the isolation module providing galvanic isolation between the first bi-directional conversion module and the second bi-directional conversion module; and a control module coupled to the first bi-directional conversion module and the second bi-directional conversion module, the control module being configured to: identify an energy delivery direction for the charging system; and when the energy delivery direction corresponds to a DC current flowing from a DC energy source coupled to the DC interface: operate the first bi-directional conversion module based on the energy delivery direction to convert DC energy from the DC energy source to a first high frequency voltage at the isolation module such that the DC current at the DC interface is in the energy delivery direction; and operate the second bi-directional conversion module based on the energy delivery direction to convert a second high frequency voltage generated by the isolation module in response to the first high frequency voltage to a lower frequency AC voltage at the AC interface such that an AC current at the AC interface flows to an AC energy source coupled to the AC interface.