论文信息 - Quantification of ageing of ultracapacitors during cycling tests with current profile characteristics of hybrid and electric vehicles applications

Quantification of ageing of ultracapacitors during cycling tests with current profile characteristics of hybrid and electric vehicles applications

The ageing quantification of ultracapacitors in cycle-life tests has been studied. Current profiles and the characteristics of the ultracapacitors used in hybrid and electric vehicle applications are specified and validated. With these profiles, significant self-heating occurs but without exceeding the manufacturers' limits. Thus, ultracapacitors are aged in a short time with the same degradation mechanisms observed in normal use. Ageing evaluation is based on the measurement of the electrical parameter changes. A particular phenomenon is performance recovery during rest periods when power-cycling is interrupted for electrical characterisation. Therefore, an online characterisation procedure was added for more accurate evaluation of the ultracapacitors' ageing. A number of devices from two manufacturers are cycled with different current profiles. The obtained results are presented and discussed.

[1] M. J. Weighall. Test requirements for 42 V battery systems , 2003 .

[2] Dirk Uwe Sauer,et al. Heat generation in double layer capacitors , 2006 .

[3] R. Kötz,et al. Temperature behavior and impedance fundamentals of supercapacitors , 2006 .

[4] Yves Scudeller,et al. Multi-level reduced-order thermal modeling of electrochemical capacitors , 2006 .

[5] F. Trinidad,et al. The VRLA modular wound design for 42 V mild hybrid systems , 2003 .

[6] R. D Brost. 42-V battery requirements from an automaker's perspective , 2002 .

[7] Bernd Spier,et al. 42-V battery requirementsleadacid at its limits , 2003 .

[8] Jean-Michel Vinassa,et al. First step in the reliability assessment of ultracapacitors used as power source in hybrid electric vehicles , 2004, Microelectron. Reliab..