Accelerated power degradation of Li-ion cells
| Autor: | E.P. Roth, Edward V. Thomas, Herbert L Case, Daniel H. Doughty, Rudolph G. Jungst, Ganesan Nagasubramanian |
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| Rok vydání: | 2003 |
| Předmět: |
Renewable Energy
Sustainability and the Environment business.industry Chemistry Kinetics Analytical chemistry Electrical engineering Energy Engineering and Power Technology Characterization test Pulsed power Accelerated aging Energy storage State of charge Degradation (geology) Electrical and Electronic Engineering Physical and Theoretical Chemistry Fade business |
| Zdroj: | Journal of Power Sources. 124:254-260 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/s0378-7753(03)00729-8 |
| Popis: | A statistically designed accelerated aging experiment was conducted to investigate the effects of aging time, temperature, and state-of-charge (SOC) on the performance of lithium-ion cells. In this experiment, a number of cells were stored in a variety of static aging environments ranging from 25 °C and 60% SOC to 55 °C and 100% SOC. The power output of each cell was monitored regularly over the course of 44 weeks via a low current level hybrid pulse power characterization test. A single empirical model of power fade, involving two concurrent degradation processes, was found to be applicable over a wide range of experimental conditions. The first degradation process is relatively rapid (nearly complete within 4 weeks) and is accelerated by temperature with unknown kinetics. The second degradation process (accelerated by temperature and SOC) is less rapid and exhibits time3/2 kinetics. |
| Databáze: | OpenAIRE |
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