Charging/driving insulation failure positioning detection method and device based on sequential control
A technology of insulation failure and timing control, applied in short-circuit testing, testing dielectric strength, etc., can solve the problem of inability to locate insulation, and achieve the effect of improving customer satisfaction, avoiding safety accidents, and ensuring safety.
Pending Publication Date: 2022-04-15
ZHENGZHOU YUTONG BUS CO LTD
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Problems solved by technology
[0005] The purpose of this application is to provide a charging / driving insulation failure location detection method and device based on sequence control to solve the problem that the existing technology cannot perform insulation location
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[0020] The high-voltage system of electric vehicles mainly includes: power battery system, battery high-voltage power distribution system and vehicle high-voltage power distribution system, such as figure 1 mentioned.
[0021] The power battery system mainly consists of a single battery box connected in series and parallel to form a power source to provide energy for the entire vehicle. The power battery system also includes a battery heating system, which is composed of battery packs connected in series and parallel, and is controlled by a heating relay (positive / negative).
[0022] The battery high-voltage power distribution system is connected between the power battery system and the vehicle high-voltage power distribution system, mainly including DC charging relays (positive / negative), heating relays (positive / negative) and related circuits; DC charging relays (positive / negative) Control the charging of the power battery, and the heating relay (positive / negative) controls...
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The invention relates to a time sequence control-based charging / driving insulation failure positioning detection method and device, and the method comprises the steps: starting the insulation detection when the charging is started; if the insulation alarm exists, the insulation failure of the battery system is positioned, and if the insulation alarm does not exist, the heating relay is closed, and the insulation detection is continued; if the insulation alarm exists, the insulation failure of the battery heating system is positioned, and if the insulation alarm does not exist, the direct-current charging relay is closed, and insulation detection continues to be carried out; if the insulation alarm exists, the insulation failure of the charging system is positioned, and if the insulation alarm does not exist, charging is carried out. Electric leakage detection can be carried out on each part of the high-voltage electrical system of the electric vehicle, an insulation failure point can be accurately positioned, different protection measures are adopted according to the severity of a fault and the severity of a fault part on the whole vehicle, the safety of personnel and whole vehicle resources is guaranteed, safety accidents are avoided, meanwhile, the problem solving efficiency is improved, and the safety of the whole vehicle is ensured. And the customer satisfaction is improved.
Description
technical field [0001] The invention relates to a charging / driving insulation failure location detection method and device based on time sequence control. Background technique [0002] Cars are an important means of transportation in modern society. However, the extensive application of fuel vehicles has caused serious environmental pollution, global warming and the crisis of human survival. Accelerating the cultivation and development of energy-saving vehicles and new energy vehicles can not only effectively alleviate the pressure on energy and the environment, but also promote the sustainable development of the automobile industry. In recent years, the new energy industry has achieved tremendous development by virtue of its own advantages, coupled with the support of government regulations and subsidy policies. [0003] The high-voltage system of an electric vehicle is composed of a power part, a drive part and related accessories of the whole vehicle. High-voltage syste...
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IPC IPC(8): G01R31/12G01R31/52
Inventor 游祥龙
Owner ZHENGZHOU YUTONG BUS CO LTD