On-board Bi-directional Electric Vehicle Charging
Technology Description:
The University of California, Berkeley (UC Berkeley) and its project team will develop an on-board electric vehicle charger using a gallium nitride (GaN) based converter to improve power density and conversion efficiency. Conventional power converter topologies which primarily use magnetics (i.e. inductors and transformers) for energy transfer suffer from a tradeoff between efficiency and size. In this project, the team proposes a shift in traditional charger design to develop a bidirectional converter dominated by capacitor-based energy transfer. The team will leverage recent advances in GaN devices and new control techniques to produce a 6.6 kW converter with 15 times the power density and higher efficiency than currently achievable. The bidirectional flow means that the device can act to charge the electric vehicle or operate in a vehicle-to-grid manner to use the vehicle as short term energy storage. If successful, project developments could help reduce the size and complexity of electric vehicle power systems.
Potential Impact:
If successful, CIRCUITS projects will enable further development of a new class of power converters suitable for a broad range of applications including motor drives for heavy equipment and consumer appliances, electric vehicle battery charging, high-performance computer data centers, grid applications for stability and resilience, and emerging electric propulsion systems.
Security:
More robust power electronics that withstand higher operating temperatures, have increased durability, a smaller form factor, and higher efficiency will significantly improve the reliability and security of a resilient electrical grid.
Environment:
Low cost and highly efficient power electronics could lead to more affordable electric and hybrid-electric transportation, greater integration of renewable power sources, and higher efficiency electric motors for use in heavy industries and consumer applications.
Economy:
Electricity is the fastest growing form of end-use energy in the United States. High performance, low cost power electronics would enable significant efficiency gains across the economy, reducing energy costs for businesses and families.
Contact
ARPA-E Program Director:
Dr. Isik Kizilyalli
Project Contact:
Prof. Robert Pilawa
Press and General Inquiries Email:
ARPA-E-Comms@hq.doe.gov
Project Contact Email:
pilawa@berkeley.edu
Partners
Oak Ridge National Laboratory
Delphi Automotive Systems, LLC
University of Arkansas
University of Illinois, Urbana Champaign
Related Projects
Release Date:
01/18/2017