Earticle

초록

영어

As environmental problems such as warming and air pollution have recently emerged, countries around the world are expanding the supply of electric vehicles as part of their eco-friendly policies. However, as electric vehicles are distributed, electric vehicle fires continue to occur. The main cause of such an electric vehicle fire is battery overload caused by battery management system (BMS) malfunction. The existing BMS measured the voltage of the battery by physically connecting each battery cell and controller. However, in electric vehicles, batteries operate up to 1,000 volts or more. BMS, which is a circuit that manages a battery in such a high voltage environment, operates at a low voltage of 5 Volt or less, and thus if a high voltage battery voltage incorrectly affects a BMS board operating at a low voltage, the BMS board is destroyed, causing battery malfunction and battery explosion. Thus, indirect measurement technology that physically isolates battery cells and low voltage control boards is important to compensate for these problems. In the indirect measurement method of the isolation structure obtained from the previous research for safe battery voltage measurement, the voltage monitoring result of battery cells of several mV~several tens of mV was caused by an error due to the device imbalance and temperature characteristics of battery cells found in the parallel structure. To resolve this problem, battery voltage was monitored sequentially on all battery cells with a single indirect measurement path, and thus an inaccurate battery cell voltage monitoring result was overcome at once due to device imbalance and temperature characteristic difference. In a process to sequentially recognize the battery cell voltage as a single path, the voltage (REF_V) to compensate for a change in monitoring voltage according to temperature could be compensated by also applying the voltage (REF_V) to compensate for temperature, so the exact battery voltage was recognized at any temperature. As a result of the design, temperature compensation was performed within 5.12 usec based on 16 battery cells, and the proposed single path Multi-Cell technology drove 1.6 mW to reduce power consumption to 1/3 of the existing research results. The research result of this paper automatically generates REF_V and battery cell voltage, which are temperature compensation voltages, together with a code value so that a battery voltage of multi-cell could be sequentially known, so that the BMS operation could be accurate without the control of the CPU.

목차

Abstract
1. Introduction
2. SEQUENTIAL BEHAVIOR BMS DESIGN
2.1. Timing Control and Battery Code generation circuit design
2.2. Switch Array Block Design
3. Results
Acknowledgments
References

키워드

저자

• WanHae Jeon [ Dept. of advanced automotive eng. Sun Moon University, Asan, Korea ] Corresponding Author
• Hikasa Akio [ Dept. of advanced automotive eng. Sun Moon University, Asan, Korea ]
• Yokoi Dakayuki [ JPC Automotive, Daejeon, Korea ]
• RimHoe kim [ Dept. of advanced automotive eng. Sun Moon University, Asan, Korea ]
• KunSik Kim [ Dept. of advanced automotive eng. Sun Moon University, Asan, Korea ]
• Innyeal Oh [ Dept. of advanced automotive eng. Sun Moon University, Asan, Korea ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  선문효정학술연구회 학술대회 프로시딩

• 간기

  반년간

• 수록기간

  2023~2026

• 십진분류

  KDC 238 DDC 289