Efficient resonant self-heating battery circuit for use in hybrid and electric vehicles

Description:

Project ID: ENG0098B

Invention Description and Novelty:

This technology includes an apparatus connected to an energy storage device for powering an electric motor and optionally providing a warming function for the energy storage device. The apparatus includes a circuit connected to the electric motor and the energy storage device for generating a current and a switching device associated with the circuit for selectively directing the current to one of the electric motor or the energy storage device.

The circuit also includes a storage circuit with a resonating frequency for storing energy.  A controller is provided for operating the switching device. In operation, energy is transferred from the energy storage device to the storage circuit while the switching device is in the open state, and returned from the storage circuit to the energy storage device while the switching device is in the closed state       

Applications:  
Self-heating Batteries for Hybrid and Hybrid Electric vehicles

Value proposition:

Novel system provides advantages including:

1.     Circuit capable of warming the battery used for powering the electric vehicle during cold environmental conditions

2.     Easily incorporated with the existing power circuitry for the electric vehicle

3.     Provides a dual function within the electric vehicle for minimizing the number of components within the electric vehicle's power circuit

4.     Energy is transferred from the energy storage device to the storage circuit while the switching device is in the open state, and returned from the storage circuit to the energy storage device while the switching device is in the closed state

5.     Batteries to be heated include a 12 volt combustion engine vehicle starter battery; 600 volt battery pack for electric vehicles; and lithium ion (Li-Ion) battery because of its high power and light weight characteristics. In addition, a variety of energy storage devices including NiCad, NiMH or even lead acid batteries can utilize the circuit of the present invention to provide highly efficient warming.  

 

IP Status: U.S. Utility Patents Issued # 6,882,061; 6,072,301

 

Patent Information:
Category(s):
Automotive
Engineering
For Information, Contact:
Anne Izzi
Licensing Associate
The University of Toledo
419 530 6226
anne.izzi@utoledo.edu
Inventors:
Cyrus Ashtiani
Thomas Stuart
Keywords:
Automotive
Battery
Charging
Electric Vehicle
Energy Storage
Heating
Hybrid Vehicle
Resonant