Journal
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
Volume 15, Issue 5, Pages 1308-1317Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cnsns.2009.05.067
Keywords
Fractional systems; System identification; Lead-acid batteries; Vehicle cranking
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Funding
- PSA Peugeot Citroen
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With EV and HEV developments. battery monitoring systems have to meet the new requirements of car industry. This paper deals with one of them, the battery ability to start a vehicle, also called battery crankability. A fractional order model obtained by system identification is used to estimate the crankability of lead-acid batteries. Fractional order modelling permits an accurate simulation of the battery electrical behaviour with a low number of parameters. It is demonstrated that battery available power is correlated to the battery crankability and its resistance. Moreover, the high-frequency gain of the fractional model can be used to evaluate the battery resistance. Then, a battery crankability estimator using the battery resistance is proposed. Finally, this technique is validated with various battery experimental data measured on test rigs and vehicles. (C) 2009 Elsevier B.V. All rights reserved.
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