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In order to increase the stability and movement safety of electric vehicles (EV) under various operation conditions, the battery mass distribution on the EV floor and its load dynamics are concerned in this study. An EV dynamic model with the different battery mass distributions on the EV floor is established and investigated. The EV dynamic equations are then solved via the Simulink model built on Matlab software. The acceleration responses at centre of gravity of the EV and wheel dynamics are two objective functions for evaluating the EV movement safety. The research results show that the optimal position of the battery mass distribution on the EV floor and the ratio between the battery mass and the EV body mass should be reached with x from 1.2 to 1.4 m and λ≤ 0.6, and the EV’s velocity should be from 20 to 35 m/s, therefore, the EV movement safety is remarkably improved.

Effect of electric battery mass distribution on electric vehicle movement safety