Method and apparatus for measuring and calculating hybrid power vehicle high-pressure energy management system insulating resistance

Abstract

The invention relates to a measurement method and a device for measuring the insulation resistance of a high-voltage energy management system of a hybrid power vehicle, and the measurement method andthe device can effectively carry out the measurement of the insulation resistance. The technical proposal is as follows: the measurement method of the insulation resistance of the high-voltage energymanagement system of the hybrid power vehicle is characterized in that the device is provided with a central processing unit circuit, a battery voltage balance detection unit circuit and an insulationresistance detection unit circuit; the central processing unit circuit judges an output voltage signal of the battery voltage balance detection unit circuit; when the voltage is in the slight imbalance, the central processing unit circuit controls the insulation resistance detection unit circuit to be started, the detected signal of the insulation resistance detection unit circuit is transmittedto the central processing unit circuit, and the central processing unit circuit transmits the signal to a battery management system through the CAN.

Description

technical field [0001] The invention relates to a method and device for measuring and calculating the insulation resistance of a high-voltage energy management system of a hybrid electric vehicle. Background technique [0002] As a vehicle for manned vehicles, safety always comes first in the automotive industry. The safety of high-voltage batteries in hybrid and pure electric vehicles is particularly important. The insulation detection device of the high-voltage battery system means the first link of vehicle safety. Most of the current monitoring devices in this area are limited to monitoring the insulation state, unable to measure the insulation resistance, and because the battery voltage measurement accuracy is not enough, it cannot replace the battery voltage acquisition unit in the battery management system, resulting in repeated design, and is more complicated, increasing the insulation The size and cost of the monitoring device, and most designs do not have isolation,...

AI Technical Summary

Problems solved by technology

Most of the current monitoring devices in this area are limited to monitoring the insulation state, unable to measure the insulation resistance, and because the battery voltage measurement accuracy is not enough, it cannot replace the battery voltage acquisition unit in the battery management system, resulting in repeated design, and is more complicated, increasing the insulation The size and cost of the monitoring device, and most designs do not have isolation, causing instability

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