Study on isolation monitoring of High-voltage battery system

摘要

After comparing the pros and cons of various isolation monitoring methods,this article presents the isolation monitoring method which based on unbalanced bridge and the characteristics of high-voltage battery system.Battery is an important component for Hybird-electric vehicle.The safety of high-voltage battery system is important specification for Hybird-electric vehicle.This device which uses Freescale's 16-bit microcontroller with CAN communications capabilities achieve real-time and accurate measurement of isolation resistance of high-voltage battery system.The article focuses on the working principle of the device,hardware design and software design.This device has high accuracy,real-time,reliability and good working environment adaptability.The measuring accuracy meets the requirement of actual project.