The invention discloses a high-voltage power-on and power-off contactor contact state diagnosis device and method and a vehicle, and belongs to the technical field of vehicle control. The high-voltage power-on and power-off contactor contact state diagnosis device comprises a high-voltage power supply, and the two ends of the high-voltage power supply are electrically connected with a fuse, a main negative contactor and one end of a second resistor respectively; the other end of the fuse is electrically connected with the fast charging positive contactor, the pre-charging contactor, the main positive contactor and the first resistor, the other end of the first resistor and the other end of the second resistor are connected with each other and electrically connected with the sampling module, and the other end of the fast charging positive contactor is electrically connected with an external load and the voltage dividing module. Compared with a scheme of two reference points, the method provided by the invention has the advantages that the complexity of high-low isolation design is reduced, the accuracy of contactor contact state diagnosis is improved, and misdiagnosis caused by load interference is avoided by sampling all voltages and referring to the battery cathode reference points.
本发明公开了一种高压上下电接触器触点状态诊断装置、方法及车辆,属于车辆控制技术领域,包括高压电源,所述高压电源两端分别与保险丝、主负接触器和第二电阻的一端电性连接,所述保险丝另一端分别与快充正接触器、预充接触器、主正接触器和第一电阻电性连接,所述第一电阻和第二电阻的另一端相互连接且与采样模块电性连接,所述快充正接触器另一端分别与外部负载和分压模块电性连接。本发明通过对所有电压采样参考电池负极参考点,相比两个参考点的方案,降低高低隔离设计的复杂性,同时提高接触器触点状态诊断的准确性,避免负载的干扰导致误诊断。
Device and method for diagnosing contact state of high-voltage power-on and power-off contactor and vehicle
一种高压上下电接触器触点状态诊断装置、方法及车辆
2022-09-23
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES |
HIGH-VOLTAGE POWER-ON AND POWER-OFF CONTACTOR CONTACT STATE DIAGNOSIS DEVICE AND METHOD, AND VEHICLE
European Patent Office | 2023
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