混合动力汽车中最小反向充电电压的研究

通过对混合动力汽车充电电路的分析,引入了蓄电池等效内阻的概念.从理论上建立了最大充电电压增益与电路内阻、电池内阻的关系,并以此来确定不同工作电流下的最低充电电压值.该值在混合动力系统中对应于实际的电机转速,可以由此确定能量回馈的最低车速.实验结果表明,采用提出的最低电压确定法可使充电回路正常工作,并具有很好的恒流效果,可用于混合动力汽车系统中.

Study on Minimum Voltage during the Charge Process of Hybrid Electric Vehicle

The conception of storage battery equivalent resistance is introduced in this paper by analyzing the charge circuit in hybrid electric vehicle(HEV) system.The relationship between maximum charge voltage gain and circuit resis-tance,battery resistance is found in theory,and the minimum charge voltage can be ascertained under the difference work current.This voltage value corresponds with a motor speed,and the lowest vehicle speed can be ascertained,similarly.Ex-perimental result proves that this control scheme can not only assure charge circuit work normally,also has good constant current performance,and it can be used in hybrid electric vehicle system.