以纯电动汽车、混合动力汽车和燃料电池汽车为代表的新能源汽车被普遍认为是未来汽车能源动力系统发展的主攻方向,已经成为世界主要发达国家和主要汽车制造商的战略重点。近几年,全球能源与环境的严峻形势,特别是国际金融危机对汽车产业的巨大冲击,推动世界各国加快交通能源战略转型,掀起了新能源汽车发展新一轮热潮。在各种新能源汽车技术路线中,以纯电动汽车、混合动力汽车和燃料电池汽车为代表的新能源汽车被 The new energy vehicles, represented by pure electric vehicles, hybrid vehicles and fuel cell vehicles, are generally considered to be the main direction of development of the automotive energy power system in the future and have become the strategic focus of the major developed countries and major automobile manufacturers in the world. In recent years, the grim situation of global energy and the environment, especially the huge impact of the international financial crisis on the automobile industry, has pushed all countries in the world to speed up the strategic transformation of transport energy and set off a new upsurge in the development of new energy vehicles. Among various new energy vehicle technology routes, new energy vehicles represented by pure electric vehicles, hybrid vehicles and fuel cell vehicles are