增程式电动汽车及其动力锂离子电池

Extended-range electric vehicles and their lithium-ion batteries

增程式电动汽车(E-REV,extended-range electric vehicle),是指在纯电动汽车基础上,增加一个内燃发电机增程器(RE),给电池充电或直接驱动电机以增加续航里程,从而克服纯电动汽车续驶里程短的瓶颈的新型电动汽车。是介于传统混合动力汽车与纯电动汽车之间的车辆类型,在排放、噪音、系统复杂性等方面优于传统混合动力汽车,但又比纯电动汽车在续驶里程和成本方面更具优势,因此,E-REV更具大规模商业化应用推广价值。E-REV所携带的动力电池本身的续驶里程并不大,但它要求具备更高的效率,同时具备高能量密度与高功率密度,这势必给锂离子电池的发展带来新的挑战与机遇。本文简要介绍E-REV及其发展以及对我国新能源汽车发展的重要意义,在此基础上,重点对适合于E-REV的动力电池进行分析。

Extended-Range Electric Vehicle（E-REV） is a new type of electric vehicle in which a range extender（RE） extends the range by charging the battery or directly drive the electric motor. It is a transition mode of the Hybrid Electric Vehicle（HEV） and the Electrical Vehicle（EV）. Comparing with HEV, it has advantage in lowing the emission, noise and systematic complexity. While comparing with EV, it has advantage in longer range and lower cost. Thus, E-REVs is a promising mode for large scale commercial applications. The batteries in E-REVs do not need to support very long range by themselves, but they need higher efficiency, higher energy density and higher power density. This is a new challenge and opportunity for lithium-ion battery development. This paper briefly introduces the development of E-REVs and their high importance to the new energy vehicle development of our nation. Base on this, the batteries suitable for E-REVs are also reviewed.