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US 8,410,758 B2Granted
Systems and methods for bi-directional energy delivery with galvanic isolation
AssigneeGM Global Technology Operations LLC
InventorLateef A. Kajouke
Life of this patent
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Abstract
Systems and methods are provided for bi-directional energy delivery. A charging system comprises a first bi-directional conversion module, a second bi-directional conversion module, and an isolation module coupled between the first bi-directional conversion module and the second bi-directional conversion module. The isolation module provides galvanic isolation between the first bi-directional conversion module and the second bi-directional conversion module.
Claims13
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.
10 more elements
A method for controlling a charging system including a first bi-directional conversion module coupled to a DC energy source at a DC interface and a second bi-directional conversion module coupled to an AC energy source at an AC interface, the AC energy source having an AC voltage, the method comprising:
- identifying an energy delivery direction for the charging system, the energy delivery direction corresponding to a DC current at the DC interface flowing from the DC energy source;
- operating the first bi-directional conversion module to convert DC energy from the DC energy source to a first high frequency voltage such that the DC current flows in the direction corresponding to the energy delivery direction;
- and
- operating the second bi-directional conversion module based on the energy delivery direction to convert a second high frequency voltage generated in response to the first high frequency voltage to the AC voltage at the AC interface such that an AC current at the AC interface flows to the AC energy source.
1 more element
A vehicle charging system comprising:
- a DC interface coupled to a DC energy source having a DC voltage;
- an AC interface coupled to an AC energy source having an AC voltage;
- a first bi-directional conversion module coupled to the DC interface;
- a second bi-directional conversion module coupled to the AC interface;
- 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 AC interface, the DC interface, the first bi-directional conversion module, and the second bi-directional conversion module, wherein the control module is configured to:
- identify an energy delivery direction;
- and
- when the energy delivery direction corresponds to a DC current flowing from the DC energy source:
- operate the first bi-directional conversion module to convert the DC voltage to a first high frequency voltage at the isolation module based on the energy delivery direction such that the DC current at the DC interface is in the energy delivery direction, wherein the isolation module generates a second high frequency voltage in response to the first high frequency voltage;
- and
- operate the second bi-directional conversion module based on the energy delivery direction to convert the second high frequency voltage from the isolation module to the AC voltage at the AC interface such that the AC current at the AC interface flows to the AC energy source.
10 more elements
Dependencies are inferred from the claim text.