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III.A.2 EV Battery Technology Assessment Program (Farasis Energy, Inc.) Harshad Tataria, USABC Program Manager Subcontractor: Farasis Energy, Inc. Keith Kepler, Program Manager 21363 Cabot Boulevard Hayward, CA 94545 Phone: (510) 732-6600; Fax: (510) 887-1211 E-mail: kkepler@farasis.com Start Date: July 2012 End Date: August 2013 Objectives Manufacture pouch cells based on BASF produced HENCM high capacity cathode material and Farasis cell technology. Conduct performance, life and safety testing of cells in parallel with DOE National Laboratories. Technical Barriers New high capacity and high voltage cathode materials offer great promise in meeting the battery performance and cost goals required for the commercial acceptance of electric vehicles (EVs). However, Li-ion cells using these new materials can experience a range of challenges that can limit the full realization of their potential and must be addressed at both the material and cell level. These challenges include minimizing impedance and achieving acceptable cycle life at elevated voltages and temperatures, maximizing cathode material long term stability and ensuring the safety of large energy dense cells. Technical Targets Manufacture large, 30Ah Li-ion pouch cells suitable for EV applications based on BASF produced HENCM cathode material. Demonstrate the potential to meet DOE EV performance and safety goals through evaluation at Farasis and DOE National Laboratories. Accomplishments Demonstration of over 1,000 cycles in prototype small pouch cells cycling at a C/3 rate at 25 C. Manufacture and delivery of 50, 30 Ah Li-ion pouch cells to DOE for evaluation at Idaho National Laboratory (INL), Sandia National Laboratory (SNL) and the National Renewable Energy Laboratory (NREL). Introduction Farasis Energy, Inc proposed to produce and supply prototype high energy density Li-ion cells to USABC based on their current commercial 25Ah Li-ion pouch cell for detailed testing and evaluation. The cells were developed using the new transition metal layered- layered type cathode material originally developed at Argonne National Laboratory. BASF, a fully licensed supplier for this class of material is one of the few companies capable of producing these developmental materials on a large scale with commercial quality and consistency. Farasis has developed material processing and cell design methods to address some of the inherent issues associated with the performance and utilization of these cathode materials that have been major barriers to their commercialization, despite the major increase in gravimetric energy density they offer over current commercial cathode material alternatives. Beginning with cathode material supplied by BASF, Farasis proposed to process, build and supply Li-ion cells to USABC in a similar form factor to our current 25 Ah cells but with an almost 20-30% greater energy density. Approach Farasis Energy, Inc currently produces a range of Li- ion cell and battery products including a 25 Ah, NCM cathode based pouch cell (Figure III - 2). The form factor and performance make it ideal for use in a range of automotive EV systems (Figure III - 3). We proposed to use this commercial form factor as the basis for the deliverable prototype cells. Energy Storage R&D 32 FY 2013 Annual Progress ReportPDF Image | Advanced Battery Development
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