The invention provides a bidirectional charging circuit of an electric automobile, a control method and control equipment of the bidirectional charging circuit, and the automobile, the bidirectional charging circuit comprises a vehicle-mounted charger, the vehicle-mounted charger is connected to a power battery through a high-voltage busbar, wherein the high-voltage busbar is also connected with at least one ECU; and a storage battery connected to the high-voltage busbar through a bidirectional DCDC conversion circuit, wherein the positive electrode of the power battery is connected with a first line in the high-voltage busbar through a first switch, the negative electrode of the power battery is connected with a second line in the high-voltage busbar through a second switch, and the bidirectional DCDC conversion circuit comprises a high-voltage circuit part, a low-voltage circuit part and a coupling circuit connected with the high-voltage circuit part and the low-voltage circuit part.According to the invention, by means of the bidirectional charging circuit, a storage battery can pre-charge the capacitor of ECU and the capacitor in a vehicle-mounted charger, so that the problem that the ECU or a semiconductor in the vehicle-mounted charger is prone to being damaged by large current generated at the moment of power-on is effectively solved.
本发明提供了电动汽车的双向充电电路及其控制方法、控制设备及汽车,所述双向充电电路包括:车载充电机,所述车载充电机通过高压母线连接至动力电池,高压母线上还连接有至少一个ECU;蓄电池,所述蓄电池通过双向DCDC转换电路连接至高压母线;所述动力电池的正极通过第一开关与高压母线中的第一线路连接,负极通过第二开关与高压母线中的第二线路连接;所述双向DCDC转换电路包括:高压电路部分、低压电路部分以及连接高压电路部分与低压电路部分的耦合电路。通过本发明的双向充电电路,使得蓄电池可为ECU的电容和车载充电机内部的电容预充电,有效地避免了通电瞬间产生的大电流易将ECU或车载充电机内部的半导体损坏的问题。
Bidirectional charging circuit of electric automobile, control method and control equipment of bidirectional charging circuit, and automobile
电动汽车的双向充电电路及其控制方法、控制设备及汽车
04.12.2020
Patent
Elektronische Ressource
Chinesisch
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