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Metal hydride-based thermal energy storage systems

United States Patent

9,777,968
October 3, 2017
View the Complete Patent at the US Patent & Trademark Office
The invention provides a thermal energy storage system comprising a metal-containing first material with a thermal energy storage density of about 1300 kJ/kg to about 2200 kJ/kg based on hydrogenation; a metal-containing second material with a thermal energy storage density of about 200 kJ/kg to about 1000 kJ/kg based on hydrogenation; and a hydrogen conduit for reversibly transporting hydrogen between the first material and the second material. At a temperature of 20.degree. C. and in 1 hour, at least 90% of the metal is converted to the hydride. At a temperature of 0.degree. C. and in 1 hour, at least 90% of the metal hydride is converted to the metal and hydrogen. The disclosed metal hydride materials have a combination of thermodynamic energy storage densities and kinetic power capabilities that previously have not been demonstrated. This performance enables practical use of thermal energy storage systems for electric vehicle heating and cooling.
Vajo; John J. (West Hills, CA), Fang; Zhigang (Salt Lake City, UT)
HRL Laboratories, LLC (Malibu, CA)
14/ 519,208
October 21, 2014
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with Government support under Contract No. DE-AR0000173 with ARPA-E, United States Department of Energy. The Government has certain rights in this invention.