EnerDel Li-Ion Battery Exceeds More USABC Phase 1 Power-Assist Goals for Hybrid Electric Vehicle Batteries
21 February 2007
Ener1 announced that the lithium-ion battery pack from its EnerDel subsidiary met and exceeded additional USABC (US Advanced Battery Consortium) phase-one power-assist performance goals for hybrid electric vehicles in independent laboratory testing.
Ener1 announced successful completion of an earlier round of USABC testing in January. EnerDel is one of four companies with a li-ion battery project with USABC—the others are the Johnson Controls-Saft joint venture (JCS), Compact Power Inc. (CPI, the US subsidiary of LG Chemical), and A123Systems.
Power-assist tests included static capacity, hybrid pulse power, self-discharge and thermal performance at various temperatures. USABC is a part of the United States Council for Automotive Research (USCAR), an umbrella organization for collaborative research among DaimlerChrysler Corporation, Ford Motor Company and General Motors Corporation, which often works with the US Department of Energy (DOE) on the cooperative development of advanced technologies.
In particular, the EnerDel cells averaged 50% more discharge power (i.e., ability to accelerate in stop-and-go traffic) compared to the end-of-life target, and the cells had a significantly lower self-discharge (i.e., the amount of battery energy loss when the vehicle is not operating) than the USABC target.
The cells exhibited consistent discharge results over wide temperature ranges, including very good low temperature performance. In the next stage tests expected in April 2007, the batteries will be tested additionally for high hybrid pulse power characterization, cold cranking, efficiency and lifetime performance.
|FreedomCAR Energy Storage System Performance Goals for Power-Assist Hybrid Electric Vehicles (November 2002)|
|Characteristic||Unit||Power-Assist (Min.)||Power-Assist (Max.)|
|Pulse discharge power (10s)||kW||25||40|
|Peak regenerative pulse power (10s)||kW||20 (55-Wh pulse)||35 (97-Wh pulse)|
|Total available energy (over DOD range where power goals are met)||kWh||0.3 (at C1/1rate)||0.5 (at C1/1rate)|
|Minimum round-trip energy efficiency||%||90
|Cold cranking power at -30°C (three 2s pulses, 10s rests between)||kW||5||7|
|Cycle life for specified SSOC increments||cycles||300,000
|Operating voltage limits||Vdc||max ≤ 400
min≥(0.55 x Vmax)
|max ≤ 400|
min≥(0.55 x Vmax)
|Maximum allowable self-discharge rate||Wh/day||50||50|
|°C||-30 to +52
-46 to +66
|-30 to +52|
-46 to +66
EnerDel is working under a 12-month, cost-share contract from USABC as part of a proposed three-phase plan to launch a cost competitive lithium ion battery that is lighter, smaller and higher in power than existing battery technologies for hybrid electric vehicles.
The company is collaborating with Argonne National Laboratory on the advanced materials that give the battery its characteristics. EnerDel’s long-term plan includes the mass-manufacture of li-ion batteries in the State of Indiana using automated production technologies.
Ener1 owns 80.5% of its EnerDel subsidiary which is developing li-ion technology through corporate ventures and strategic partnerships with Delphi, ITOCHU and EnerStruct.
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