关键词: Ni-MH电池, 充放电, 电动车辆, 能量管理, 智能控制

Abstract: The Ni-MH battery is the power source of electric vehicles (EV) and plays a decisive role in the power performance. The charge and discharge control principle of Ni-MH battery used in EV is introduced. The whole construction and function flow of monitor and control for Ni-MH battery of EV are presented. The charge and discharge control arithmetic is investigated so that the Ni-MH energy of the EV may be consumed reasonably. After the investigation of the charge and discharge characteristic curves of Ni-MH battery, the effects of the charge and discharge voltage, current and battery temperature on the capacity are also analyzed. The experimental results show that the control system can make energy utilization increase by more than 20 percent, and it features strong self-adaptive ability and reliable operation, and moreover, the battery life prolonged remarkably.

Key words: Charge and discharge, Electric vehicle(EV), Energy management, Intelligent control, Ni-MH battery