Battery safety of electric vehicles is important for the application of electric vehicles. The performance of the battery pack determines the development of electric vehicle. Domestic and overseas media have reported electric vehicle explosion accidents so many times, l?attery safety of electric vehicles mainly contains three aspects: electrical safety, thermal balance and vibration, the vibration of the battery pack is especially important. Vibration will lead to the declination of battery performance, the change of contact resistance, even the arc and uncontrollable thermal under driving condition. These may cause a lire or an explosion. The performance of battery pack not only depends on the BMS (Battery Management System) that makes the battery pack charges and discharges more reasonably, but depends on the stability of the battery pack. The vehicle steering characteristic is changed because of the ground roughness, and it influences the movement of the battery pack. To improve the ride performance of the vehicle and battery pack, it is essential to study the interaction of electric vehicle roll and battery pack stability [1]-[3].
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