随着世界汽车保有量的急剧增长,人们越来越意识到传统的内燃机汽车对人类环境的危害。人们对生存环境的要求越来越高,降低汽车有害排放的呼声与日俱增。环境保护的迫切性和石油储量日见短缺的压力,迫使人们重新考虑未来汽车的动力问题。经过对各种新能源和新动力的探索,电动汽车成为最主要的选择之一。纯电动汽车由于关键部件之一的电池能量密度、寿命、价格等方面的问题,使得其性价比无法与传统的内燃机汽车相抗衡,在发展中 With the rapid growth of car ownership in the world, people are becoming more aware of the dangers of the traditional internal combustion engine vehicles on the human environment. People are increasingly demanding on their living environment, and voices of reducing harmful emissions from automobiles are increasing day by day. The urgency of environmental protection and the lack of pressure on oil reserves have forced people to reconsider the power issue of the future car. After a variety of new energy and new impetus exploration, electric vehicles to become one of the most important choice. Pure electric vehicles due to one of the key components of the battery energy density, life expectancy, price and other issues, making the cost can not compete with the traditional internal combustion engine cars in development