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Mathematical Problems in Engineering
Volume 2015, Article ID 123626, 12 pages
http://dx.doi.org/10.1155/2015/123626
Research Article

Impact Safety Control Strategy for the Battery System of an Example Electric Bus

Beijing Institute of Technology, Beijing 100081, China

Received 1 December 2014; Revised 2 February 2015; Accepted 3 March 2015

Academic Editor: Łukasz Jankowski

Copyright © 2015 Zhen-po Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper proposes a side impact safety control strategy for the battery system, aiming at defusing the hazards of unacceptable behaviors of the battery system such as high-voltage hazards. Based on some collision identification metrics, a side impact discrimination algorithm and a side impact severity algorithm are developed for electric buses. Based on the study on the time to break for power battery, the side impact discrimination algorithm response time is about 20 ms posing a great challenge to the side impact discrimination algorithm. At the same time, the reliability of the impact safety control strategy developed in this paper is evaluated for other plausible side impact signals generated by finite element analysis. The results verify that the impact safety control strategy exhibits robust performance and is able to trigger a breaking signal for power battery system promptly and accurately.