As the energy storage device of an electric vehicle (EV), in order to meet the mileage requirements, a battery pack always has large volume and mass and is responsible for a considerable portion of the yaw rotational inertia of the entire vehicle. As the yaw rotational inertia has a negative impact on the vehicle cornering response, a new type of EV chassis structure is proposed herein, which is equipped with a yaw direction oscillatable battery pack. This battery pack can reduce the yaw rotational inertia of the vehicle to improve handling performance while meeting the mileage and spatial layout requirements. Based on this chassis structure, a linear 3-degrees-of-freedom (DOF) mathematical dynamic model and an ADAMS multi-body dynamics model are built. Then, the lateral dynamic characteristics are estimated for different typical test conditions by simulation. The comparative results and analysis between the new type of chassis and the conventional chassis are presented. The new type of chassis is shown to have advantages in terms of handling performance.

作为电动汽车（EV）的储能装置，为了满足续航里程的要求，电池组总是体积大、质量大，承担了整车相当一部分的偏航转动惯量。由于偏航转动惯量对车辆的转弯响应有负面影响，本文提出了一种新型的电动汽车底盘结构，该结构配备了偏航方向可摆动的电池组。该电池组可在满足里程和空间布局要求的同时，降低车辆的偏航转动惯量，提升操控性能。基于此底盘结构，建立了线性三自由度（DOF）数学动力学模型和ADAMS多体动力学模型。然后，通过模拟估计了不同典型测试条件下的横向动态特性。给出了新型底盘与传统底盘的对比结果和分析。新型底盘在操控性能方面显示出优势。