A high-voltage insulation fault detection method, device, electronic equipment and system

Abstract

The application of the present invention discloses a high-voltage insulation fault detection method, device, electronic equipment and system; the high-voltage insulation fault detection method, the specific steps include: obtaining fault detection instructions; controlling multiple high-voltage contactors to close sequentially according to a preset sequence; wherein , the plurality of high-voltage contactors respectively control the opening and closing of different branches; respectively calculate the resistances of the different branches after closing, and obtain detection results. The application of the present invention solves the problem that since the insulation detector of the pure electric vehicle is in the high-voltage general circuit, it is difficult to determine the specific fault branch after a fault occurs, and it is necessary to manually use a multimeter to detect one by one, resulting in highly specialized fault detection and requiring professionals. At the same time time-consuming and laborious technical problems.

Description

technical field [0001] The application of the present invention relates to the field of pure electric vehicles, in particular, to a high-voltage insulation fault detection method, device, electronic equipment and system. Background technique [0002] Pure electric vehicles are powered by on-board power supplies, and the voltage range is usually 350V-700V. The high-voltage power distribution distributes power to various components, and the high-voltage distributor distributes the high voltage of each branch through the high-voltage contactor of each branch. Usually, there is an insulation resistance detection device on the main circuit to judge the high-voltage safety by monitoring the insulation value of the high-voltage system of the vehicle in real time. When the detection value is lower than the set value, the high-voltage relay of the main branch circuit is cut off to ensure safety. At present, all high-voltage components are required to reach the IP67 level, but in actu...

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Problems solved by technology

[0003] The main purpose of the application of the present invention is to provide a high-voltage insulation fault detection method, device, electronic equipment and system, which can quickly and easily detect the specific branch in the insulation fault of the whole vehicle without increasing the hardware cost; Solve the problem that because the insulation detector of pure electric vehicles is in the high-voltage general circuit, it is difficult to determine the specific fault branch after a fault occurs, and it is necessary to manually use a multimeter to detect one by one, resulting in highly specialized fault detection that requires professionals and is time-consuming and laborious. technical problem

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