Salah Oweis

Hermetically sealed thermocompression feedthrough and peripheral seal for high temperature lithium based battery applications

A design and process for making hermetically sealed thermocompression feedthrough and peripheral seal for high temperature Li Alloy FeSx battery cells and battery enclosures. The selected materials and processes parameters are developed to match the high temperature Li Alloy/FeSx system.

Rechargeable lithium-aluminum/iron sulfide batteries for high energy density

A rechargeable lithium aluminum/iron sulfide battery has been built and tested. Prismatic LiAl/FeS cells provide a delivered energy to 80% depth of discharge (DOD) of 217 Wh/1 and a peak power of 375 W/l. Cycle life of over 365 cycles was achieved at the C/3 rate. Pulse self-discharge and driving cycle tests were also performed for an electric vehicle application. The molten salt electrolyte requires an operational temperature of about 450 degrees C. A thermal control system composed of heating elements, thermal enclosure, and heat exchanger was engineered and tested. The components for a 8 kWh battery were developed and evaluated. This high temperature rechargeable battery is suitable for applications requiring high specific energy and minimal volume.<<ETX>>

Optimization of externally heated thermal battery

Abstract An externally heated thermal battery (EHTB) using an LiAl/Ag 2 CrO 4 couple was developed to meet the unusual requirements of an open circuit stand of 8 h. The battery was designed to maximize the voltage output, to control cathode growth and corrosion of cell components, and to minimize passivation of pellets during wet stand. The final design of the EHTB consisted of three parallel strings of two cells for a total of six individual cells. The battery exhibited a stable OCV from 5.75–5.77 V throughout a slow temperature ramp at 3.3 °C/h from 120–149 °C and yielded currents in excess of 2.5 A when pulsed for 50 ms through a 1 Ω load.