University of Delaware OEIP
University of Delaware

Flywheel Energy Device with Rotating Chemical Energy Storage

Technology #ud20-09

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A novel flywheel energy device that combines electrochemical and electromechanical storage has been developed. The invention comprises a novel flywheel in which kinetic, electrochemical, and thermal energy are all stored in a single device. The design of this device allow for easy replacement of the electrochemical cells, thus extending the life of the system.

Problem Addressed:

With energy storage systems being an area of interest for a wide range of industries such as those in portable electronics, home backup power storage systems, electric vehicles, and many more this invention has many potential users. Holding a large amount of energy per unit mass remains a limiting factor for these applications. With this invention, having the electrochemical cells inside the rotating flywheel, energy may be summed between the two storage forms, leading to energy densities potentially as high as 600 Wh/kg.


·  Addresses low energy density problem

o  Allows more energy to be stored in less mass

·  Unique and superior rotating electrochemical energy

o  Provides ability to store energy kinetically and chemically

·  Easy replacement of electrochemical cells at any time

Technology Summary:

·  With this device, electrical energy is stored by rotating a body and storing its kinetic energy as rotational inertia and electrical energy is stored by electrochemical cells. This novel flywheel consists of a unique arrangement where the electrochemical cells are easily removed for replacement, yet can provide energy during flywheel rotation. Possible commercial applications for this device would include things such as electric vehicles, backup electrical energy storage, drones, aircrafts, spacecrafts and more.


The technology is patent pending. Further information on licensing opportunities is available on request.