Study on Isolation Monitoring of High-Voltage Battery System

Abstract:

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.

• Periodical: Applied Mechanics and Materials (Volumes 44-47)
• Pages: 571-575
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.44-47.571
• Online since: December 2010
• Authors: Chang Hao Piao, Teng Cong
• Keywords: Battery System, Isolation, Monitoring, Unbalanced Electric Bridge

References

[1] FENG Xing-hai, SUN Hong-yu. Introduction for Some Isolation Detection Methods in DC Power Supply System[J]. Power Supply Technologies And applications, 2007, 10(6): 63-69.

[2] WANG Hua-gen, YIN Bin. Research and Application of DC system Isolation Monitoring[J]. Micro-computer Information, 2003, 19(12): 38-39.

[3] JIA Xiu-fang, ZHAO Cheng-yong. The Comparison of Present Several Methods for Detecting the Grounding Faults of DCSystem[J]. Northeast Electric Power Technology, 1999, (9): 48-50.

[4] JIA Xiu-fang, ZHAO Cheng-yong. Synthesized Criteria of DC System Isolation Monitoring[J]．Automation of Electric Power Systems, 1999, 23(16): 47-49.