Insulation resistance detection system for electric vehicle and insulation resistance detection method thereof

An insulation resistance detection system for an electric vehicle is used for detecting positive insulation resistance between a positive electrode of a battery of the electric vehicle and an equipment grounding point and negative insulation resistance between a negative electrode of the battery of...

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Bibliographic Details
Main Authors ZENG JIANYU, XIE WENZHENG, ZHENG YUXIANG
Format Patent
LanguageChinese
English
Published 20.09.2022
Subjects
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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Summary:An insulation resistance detection system for an electric vehicle is used for detecting positive insulation resistance between a positive electrode of a battery of the electric vehicle and an equipment grounding point and negative insulation resistance between a negative electrode of the battery of the electric vehicle and the equipment grounding point, and the insulation resistance detection system comprises a negative electrode detection circuit, a positive electrode detection circuit and a control unit. The control unit controls the negative electrode detection circuit to be charged to generate a first capacitor voltage and controls the positive electrode detection circuit to be charged to generate a second capacitor voltage. The control unit determines whether the cathode insulation resistance is abnormal according to the first capacitor voltage and the battery voltage of the battery, and determines whether the anode insulation resistance is abnormal according to the second capacitor voltage and the batte
Bibliography:Application Number: CN202110268618