5 research outputs found
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Novel Battery Testing Procedures and Analytical Methodologies for Hybrid Electric Vehicles
The Idaho National Engineering and Environmental Laboratory has developed novel testing procedures and analytical methodologies to assess the performance of batteries for use in hybrid electric vehicles. Tests include both characterization and cycle life and/or calendar life. Tests have been designed for both Power Assist and Dual Mode applications. Analytical procedures include a battery scaling methodology, the calculation of pulse resistance, pulse power, available energy, and differential capacitance, and the modeling of calendar and cycle life data. At periodic intervals during life testing, a series of Reference Performance Tests are executed to determine changes in the baseline performance of the batteries
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PNGV Battery Performance Testing and Analyses
In support of the Partnership for a New Generation of Vehicles (PNGV), the Idaho National Engineering and Environmental Laboratory (INEEL) has developed novel testing procedures and analytical methodologies to assess the performance of batteries for use in hybrid electric vehicles (HEV’s). Tests have been designed for both Power Assist and Dual Mode applications. They include both characterization and cycle life and/or calendar life. At periodic intervals during life testing, a series of Reference Performance Tests are executed to determine changes in the baseline performance of the batteries. Analytical procedures include a battery scaling methodology, the calculation of pulse resistance, pulse power, available energy, and differential capacity, and the modeling of calendar- and cycle-life data. PNGV goals, test procedures, analytical methodologies, and representative results are presented
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Initial Comparisons between the Advanced Technology Development Gen 2 Baseline Cells and Variant C Cells
The Advanced Technology Development Program is testing a second generation of lithium-ion cells, consisting of a baseline and three variant chemistries. The cathode composition of the Variant C chemistry was altered with an increase to the aluminum dopant and a decrease to the cobalt dopant to explore the impact on performance. However, it resulted in a 20% drop in rated capacity. Also, the Variant C average power fade is higher, but capacity fade is higher for the Baseline cell chemistry. Initial results indicate that the Variant C chemistry will reach end of life sooner than the Baseline chemistry
Recommended from our members
PNGV Battery Testing Procedures and Analytical Methodologies for Hybrid Electric Vehicles
Novel testing procedures and analytical methodologies to assess the performance of hybrid electric vehicle batteries have been developed. Tests include both characterization and cycle life and/or calendar life, and have been designed for both Power Assist and Dual Mode applications. Analytical procedures include a battery scaling methodology, the calculation of pulse resistance, pulse power, available energy, and differential capacity, and the modeling of calendar and cycle life data. Representative performance data and examples of the application of the analytical methodologies including resistance growth, power fade, and cycle and calendar life modeling for hybrid electric vehicle batteries are presented