Grid friendly electric vehicle charging technology licensed for market development


Richland, WA, U.S.A. — (METERING.COM) — March 7, 2013 – A technology that will allow widespread adoption of plug-in electric vehicles without negatively impacting the electrical grid, and may ultimately result in lower costs for plug-in EV owners, has been licensed by Battelle to electric transportation solutions provider AeroVironment, Inc., of Monrovia, CA.

AeroVironment will use a portion of the licensed technology in a new prototype version of its Level II charging systems.

Developed at PNNL, which is operated by Batelle, the Grid Friendly EV Charger Controller technology tells the car’s battery charger when to start and stop charging based upon existing conditions on the electrical grid. Since electric vehicles can now be charged when electricity is most readily available, the technology could translate into lower bills for vehicle owners and a more stable grid.

AeroVironment’s new prototype EV charging station, incorporating the PNNL technology, will help stabilize the electrical grid by continuously monitoring the grid’s AC frequency and varying the vehicle charging rate in response. If an unexpected event on the grid causes a rapid drop in the AC frequency, the charging system will stop charging, providing a grid “shock absorber.”

Under normal conditions, this stabilizing technology will be particularly important as the power grid is expected to rely more and more on variable renewable resources such as wind and solar technologies.
An earlier PNNL study found America’s existing power grid could meet the needs of about 70 percent of all U.S. light duty vehicles if battery charging was managed to avoid new peaks in electricity demand.

“If a million owners plug in their vehicles to recharge after work, it could cause a major strain on the grid,” said PNNL lead engineer Michael Kintner-Meyer. “The Grid Friendly Controller could prevent those peaks in demand from plug-in vehicles and enable our existing grid to be used more evenly. And our studies have shown that those who use the technology could save $150 or more a year on their electricity bill, and they could potentially receive rebates for providing shock absorbing services to the grid operator.”

Prototypes of the new AeroVironment charging system are available for beta testing. The prototypes include Bluetooth wireless connectivity for data streaming and local control functions.