多变环境因素影响下电动汽车智能充电器的低功耗设计

Low Power Design of Electric Vehicle Intelligent Charger Under the Influence of Variable Environment

传统采用LLC谐振半桥法设计的电动汽车充电器,存在充电器充电耗时长、消耗功率大,使用寿命短问题,提出基于BMS的电动汽车智能充电器低功耗设计方法,充分考虑环境因素对充电器的老化、腐蚀等影响,对智能充电器的总体框架进行设计,通过控制电路对电路中产生的信息进行有效收集,获取控制信号或保护信号,有效控制充电时电池功率;采用保护电路检测故障以及进行故障预警。通过分析充电器在采样模式和等待模式的功率消耗,获取智能充电器的低功耗工作模式,实现充电器的低功耗控制。实验结果说明,所提方法可有效缓解环境因素对充电器的老化、腐蚀等影响,降低电动汽车充电用时和功耗,延长充电器的使用寿命。

With traditional LLC resonant half bridge design method, existing charger has the disadvantages of time consuming, large power consumption and short service life. This paper proposed a low power consumption of electric vehicle intelligent charger based on BMS design method, considering the influence of environmental factors on the charger aging, corrosion and so on. The general framework of intelligent charger was designed, it can effectively collect information generated in circuit, gain control signal or protection signal through the control circuit, and achieve effective control of battery power when charging; it also used protection circuit for fault detection and fault warning. By analyzing the power consumption of the charger in the sampling mode and waiting mode, we acquire the low power mode of the intelligent charger and achieve the low power consumption control of the charger. The experimental results show that the proposed method can effectively mitigate the effects of environmental factors on aging and corrosion of chargers, reduce the charging time and power consumption of electric vehicles, and extend the service life of chargers.