Abstract
This paper examines the performance loss of lithium ion (LiIo) batteries as a result of aging effects. For this purpose, the state of merit (SOM) is introduced as a novel parameter. The SOM can be
calculated as an inherent quantity considering both the increase in impedance as well as the loss in capacity of a battery cell. This is realized by measuring the time needed for a discharge process with
different current rates (CR) within the allowed current range. The discharge times contain all the required performance information for calculating the SOM making it a comprehensive parameter to state
the current overall condition of the cell. To validate the SOMapproach, the SOM, the capacity and the impedance are estimated for three cells at different conditions of aging. Finally, the SOM, the impedance increase as well as the capacity decrease
are compared and discussed.
Original language | English |
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Title of host publication | AABC E-Proceedings |
Publication status | Published - 2011 |
Event | Advanced Automotive Battery Conference - Duration: 6 Jun 2011 → 10 Jun 2011 |
Conference
Conference | Advanced Automotive Battery Conference |
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Period | 6/06/11 → 10/06/11 |
Research Field
- Not defined