电动汽车多段式智能自动化充电机的设计研究

当前大部分充电机硬件电路设计过于简单,通常是恒压恒流充电,同时充电控制过程只适于某一种蓄电池,无法有效控制充电过程,在很大程度上会导致电池欠充或过充,减少蓄电池使用寿命。为此,设计一种新的电动汽车多段式智能自动化充电机,硬件设计时,介绍了主电路、采集电路和控制电路的设计过程。软件设计时,将整流电路和蓄电池共同看作被控对象,将充电机的输出和一个小电感串联在一起,给出被控对象数学模型,将其看作传递函数,通过PID算法对充电机进行充电控制。实验结果表明,所设计充电机稳压稳流精度高、并联均流不平衡度低、发热状态可达到允许温升要求,且充电控制性能高。

The design of electric vehicle multi segment type intelligent automatic charger

Most of the current charger hardware circuit design is too simple, usually constant current charging, the charging control process is only suitable for a battery, can not effectively control the charging process, to a large extent will cause the battery under charge or over charge, reduce the service life of the battery. Therefore, the design of a new electric vehicle multi segment type intelligent automatic charger, hardware design, introduces the design process of main circuit, sampling circuit and control circuit. In software design, the rectifying circuit and the battery as a common object, the charger output and a small inductor in series with the given model of controlled object, as the transfer function of the charger, the charging control by PID algorithm. The experimental results show that the design of charger controlling precision, parallel flow imbalance, low heating state can reach the permissible temperature rise, and charging high control performance.