The developing status of lithium ion battery for hev was introduced .

最后介绍了电动车用锂离子电池的研究开发情况。

Firstly , the paper discusses the development actuality of hev technology and aircraft towing tractor technology .

首先，文章分析了混合动力车辆技术和飞机牵引车技术的发展现状。

Hev , jackl jack , go to the mirror in the bedroom , will vou ?

嘿，杰克，到卧室的镜子前，好吗？

It will be the best policy for vehicle employers to install fewer batteries and simultaneously develop hev .

主事者应以少量电池配置、同时并行发展油电混合车，才是上上之策。

Energy management of hev is the key problem of the research and development on hev because of its non-linear , random and ambiguous features .

混合动力电动汽车能量管理因它的非线性、随机性和模糊性等特点而成为混合动力电动汽车研究和开发的关键问题。