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Power Charging and Supply System for Electric Vehicles

Oak Ridge National Laboratory

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Technology Marketing SummaryA versatile new power electronics system for electric and hybrid electric vehicles (EVs/HEVs) solves several key challenges in green transportation. Current EVs and plug-in HEVs require an external plug-in charger powered by the utility grid. This ORNL technology eliminates the need for an external charger and enables these vehicles to function as mobile electrical power generators for emergency and other uses. DescriptionThe technology integrates the battery-charging function into the electrical motor drive system. By using only the onboard inverter and motor without adding any inductors or switches, this system reduces component cost. The system also remedies problems such as inadequate battery capacity and inconvenient chargers.

Specifically, this power electronics system transfers power between an energy storage device, an onboard electrical power generator, a vehicle drive shaft, and an external load. A mode selection switch tells an electronics controller to operate in one of three modes: propulsion mode, for driving the vehicle; charging mode, for charging the battery; or sourcing mode, for supplying power to external loads.
Benefits
  • Integrates level 1 (slow) and level 2 (fast) battery charging functions into the electrical motor drive system
  • Enables hybrid vehicles to supply power to external loads without additional components
  • Functions as a mobile electrical power generator for emergency and other uses
Applications and Industries
  • Electric vehicles
  • Hybrid electric vehicles
More InformationInventor:
Gui-Jia Su
Power Electronics and Electrical Power Systems Research Center Energy and Transportation Science Division
Oak Ridge National Laboratory
Patents and Patent Applications
ID Number
Title and Abstract
Primary Lab
Date
Patent 7,733,039
Patent
7,733,039
Electric vehicle system for charging and supplying electrical power
A power system that provides power between an energy storage device, an external charging-source/load, an onboard electrical power generator, and a vehicle drive shaft. The power system has at least one energy storage device electrically connected across a dc bus, at least one filter capacitor leg having at least one filter capacitor electrically connected across the dc bus, at least one power inverter/converter electrically connected across the dc bus, and at least one multiphase motor/generator having stator windings electrically connected at one end to form a neutral point and electrically connected on the other end to one of the power inverter/converters. A charging-sourcing selection socket is electrically connected to the neutral points and the external charging-source/load. At least one electronics controller is electrically connected to the charging-sourcing selection socket and at least one power inverter/converter. The switch legs in each of the inverter/converters selected by the charging-source/load socket collectively function as a single switch leg. The motor/generators function as an inductor.
Oak Ridge National Laboratory 06/08/2010
Issued
Technology Status
Technology IDDevelopment StageAvailabilityPublishedLast Updated
UT-B ID 200601740DevelopmentAvailable10/20/201012/08/2010

Contact ORNL About This Technology

To: David L. Sims<simsdl@ornl.gov>