creator Al Hallaj, Said creator Selman, Jan Robert The invention is to a method of operating a power supply system comprising the steps of discharging at least one cell element of a battery module to produce a quantity of power and a quantity of heat; absorbing at least a portion of the heat in a phase change material in thermal contact with the discharging cell element; following discharge, releasing at least a portion of the heat from the phase change material to heat the at least one cell element; and discharging the at least one cell element at elevated temperature. Submitted by Aric Ahrens (ahrens@iit.edu) on 2012-01-12T19:14:22Z No. of bitstreams: 1 6468689.pdf: 91171 bytes, checksum: 8c3724fc53db80f507bba21066470b45 (MD5) Made available in DSpace on 2012-01-12T19:14:22Z (GMT). No. of bitstreams: 1 6468689.pdf: 91171 bytes, checksum: 8c3724fc53db80f507bba21066470b45 (MD5) Previous issue date: 2002-10-22 Illinois Institute of Technology 2009-05-14 2002-10-22 6,468,689 http://hdl.handle.net/10560/2438 en United States Patent Patent reformatted digital application/pdf No Copyright - United States http://rightsstatements.org/page/NoC-US/1.0/ Open Access