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Intelligent vehicle electrical power supply system with central coordinated protection

  • Vehicle Engineering
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Abstract

The current research of vehicle electrical power supply system mainly focuses on electric vehicles (EV) and hybrid electric vehicles (HEV). The vehicle electrical power supply system used in traditional fuel vehicles is rather simple and imperfect; electrical/electronic devices (EEDs) applied in vehicles are usually directly connected with the vehicle’s battery. With increasing numbers of EEDs being applied in traditional fuel vehicles, vehicle electrical power supply systems should be optimized and improved so that they can work more safely and more effectively. In this paper, a new vehicle electrical power supply system for traditional fuel vehicles, which accounts for all electrical/electronic devices and complex work conditions, is proposed based on a smart electrical/electronic device (SEED) system. Working as an independent intelligent electrical power supply network, the proposed system is isolated from the electrical control module and communication network, and access to the vehicle system is made through a bus interface. This results in a clean controller power supply with no electromagnetic interference. A new practical battery state of charge (SoC) estimation method is also proposed to achieve more accurate SoC estimation for lead-acid batteries in traditional fuel vehicles so that the intelligent power system can monitor the status of the battery for an over-current state in each power channel. Optimized protection methods are also used to ensure power supply safety. Experiments and tests on a traditional fuel vehicle are performed, and the results reveal that the battery SoC is calculated quickly and sufficiently accurately for battery over-discharge protection. Over-current protection is achieved, and the entire vehicle’s power utilization is optimized. For traditional fuel vehicles, the proposed vehicle electrical power supply system is comprehensive and has a unified system architecture, enhancing system reliability and security.

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Authors and Affiliations

  1. State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing, 100084, China

    Diange Yang, Weiwei Kong, Bing Li & Xiaomin Lian

Authors
  1. Diange Yang
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  2. Weiwei Kong
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  3. Bing Li
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  4. Xiaomin Lian
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Corresponding author

Correspondence to Diange Yang.

Additional information

Supported by Collaborative Innovation Center of Intelligent New Energy Vehicle of U.S. and China-Clean Energy Research Center, Fund of China Scholarship Council (Grant No. 201406215015)

YANG Diange was born in 1973, and is currently a professor at Department of Automotive Engineering, Tsinghua University, Beijing, China. He is the Vice Director of State Key Laboratory of Automotive Safety and Energy. His research interests primarily focus on vehicle electronics, connected vehicles and NVH. He has authored 9 software copyrights and registered more than 30 national patents. He has also published more than 120 papers.

KONG Weiwei was born in 1987, and is a PhD candidate at Department of Automotive Engineering, Tsinghua University, Beijing, China. Her research primarily focuses on vehicle electronics and power management systems.

LI Bing was born in 1981, and is a post doctor at State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing, China. His research primarily focuses on vehicle electronics and connected vehicles.

LIAN Xiaomin was born in 1955, and is currently a professor at Department of Automotive Engineering, State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing, China. His research interests primarily focus on NVH and vehicle electronics.

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Yang, D., Kong, W., Li, B. et al. Intelligent vehicle electrical power supply system with central coordinated protection. Chin. J. Mech. Eng. 29, 781–791 (2016). https://doi.org/10.3901/CJME.2016.0401.044

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  • DOI: https://doi.org/10.3901/CJME.2016.0401.044

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