Skip to Content
Find More Like This
Return to Search

Passive safety device and internal short tested method for energy storage cells and systems

United States Patent

9,142,829
September 22, 2015
View the Complete Patent at the US Patent & Trademark Office
National Renewable Energy Laboratory - Visit the NREL Technology Transfer Website
Internal Short Circuit Device for Improved Lithium-Ion Battery Design
A passive safety device for an energy storage cell for positioning between two electrically conductive layers of the energy storage cell. The safety device also comprising a separator and a non-conductive layer. A first electrically conductive material is provided on the non-conductive layer. A first opening is formed through the separator between the first electrically conductive material and one of the electrically conductive layers of the energy storage device. A second electrically conductive material is provided adjacent the first electrically conductive material on the non-conductive layer, wherein a space is formed on the non-conductive layer between the first and second electrically conductive materials. A second opening is formed through the non-conductive layer between the second electrically conductive material and another of the electrically conductive layers of the energy storage device. The first and second electrically conductive materials combine and exit at least partially through the first and second openings to connect the two electrically conductive layers of the energy storage device at a predetermined temperature.
Keyser; Matthew (Arvada, CO), Darcy; Eric (League City, TX), Long; Dirk (Golden, CO), Pesaran; Ahmad (Boulder, CO)
Alliance for Sustainable Energy, LLC (Golden, CO)
13/ 882,316
20130209841
October 27, 2010
CONTRACTUAL ORIGIN The United States Government has rights in this invention under Contract No. DE-AC36-08GO28308 between the United States Department of Energy and the Alliance for Sustainable Energy, LLC, the Manager and Operator of the National Renewable Energy Laboratory.