The invention discloses an electric vehicle high-voltage interlocking drive circuit and a fault judgment method, and relates to the technical field of detection circuits. Comprising a micro-control unit, a first resistance voltage divider, a second resistance voltage divider, a resistor R3, a high-voltage plug-in, a push-pull circuit and a low-pass filter, a general input and output port of the micro-control unit is connected to the input end of the inference circuit, the output end of the push-pull circuit is connected to the low-pass filter, the low-pass filter is connected to the high-voltage connector, a first digital-to-analog conversion interface of the micro-control unit is connected to the first end of the first resistance voltage divider, and a second digital-to-analog conversion interface of the micro-control unit is connected to the second end of the second resistance voltage divider. The second end of the first resistance voltage divider is connected to the first end of the high-voltage plug-in, the second end of the high-voltage plug-in is connected to the first end of the resistor R3, the second end of the resistor R3 is grounded, the second digital-to-analog conversion interface of the micro-control unit is connected to the first end of the second resistance voltage divider, and the second end of the second resistance voltage divider is connected to the second end of the high-voltage plug-in. The invention aims to improve the detection precision of the health state of the high-voltage plug-in.
本发明公开了电动汽车高压互锁驱动电路和故障判断方法,涉及检测电路技术领域。包括:微控制单元、第一电阻分压器、第二电阻分压器、电阻R3、以及高压插件、推挽电路、低通滤波器;微控制单元的通用输入输出端口连接在推断电路的输入端,推挽电路的输出端连接于低通滤波器,所述低通滤波器连接于高压接插件,所述微控制单元的第一数模转换接口连接在第一电阻分压器的第一端,第一电阻分压器的第二端连接在高压插件的第一端,高压插件的第二端连接于电阻R3的第一端,电阻R3的第二端接地,微控制单元的第二数模转换接口连接在第二电阻分压器的第一端,第二电阻分压器的第二端连接于高压插件的第二端。旨在提高对高压插件健康状态的检测精度。
Electric automobile high-voltage interlocking drive circuit and fault judgment method
一种电动汽车高压互锁驱动电路和故障判断方法
2024-08-02
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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