This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Deep Integrated Development of On-Board Charger and DC/DC on Component Level for New Energy Vehicles
Technical Paper
2022-01-0167
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The on-board charger and DC/DC undertake the power conversion function between AC charging of new energy vehicles and low-voltage power supply of the vehicle, which are indispensable parts of the vehicle system. With the rapid development of electric vehicle industry, the current automotive industry has more and more stringent requirements on power system. Lightweight and high power density are more and more important for OEMs. With the increasing popularity of electric vehicles, how to reduce the cost has become one of the most important indicators for OEMs.
In the traditional on-board power supply, the on-board charger and DC/DC are mostly combined as independent parts in the vehicle system. In order to meet the integration requirements of OEMs, the on-board charger and DC/DC are even put on a PCB board or only in a shell, so as to achieve the so-called "integration" requirements. But in terms of cost, lightweight, and power density, this approach doesn't really make a real difference to the system.
In terms of technology, LLC topology is adopted for the rear power conversion of vehicle charters. LLC provides the possibility of high frequency and high efficiency for the system by virtue of its soft switch characteristics. However, LLC and the traditional phase shift full bridge cannot bring great efficiency improvement due to the wide output voltage and large output current of DC/DC.
This paper focuses on introducing the integration scheme of on-board charger and DC/DC for new energy vehicles. The innovative topology architecture is used to fully integrate DC/DC with on-board charger to realize the deep integration at component level so as to meet the requirements of lightweight, low cost and high power density. At the same time, this topology takes into account the characteristics of soft switch, which guarantees the high efficiency of the system.
Recommended Content
Authors
Citation
Liu, J., Li, W., Jiang, T., Yang, F. et al., "Deep Integrated Development of On-Board Charger and DC/DC on Component Level for New Energy Vehicles," SAE Technical Paper 2022-01-0167, 2022, https://doi.org/10.4271/2022-01-0167.Also In
References
- Yue , W. Design of 15kW full bridge LLC resonant Converter Applied Power Electronics Technology 06 06 2014 74 76
- Lu , B. et al. Optimal Design Methodology for LLC Resonant Converter Applied Power Electronics Conference and Exposition APEC 2006 533 538
- Cho , K.M. , Kim , Y.D. , Cho , I.H. , and Moon , G.W. Transformer Integrated with Additional Resonant Inductor for Phase-Shift Full-Bridge Converter with Primary Clamping Diodes IEEE Trans. Power Electron. 27 5 2405 2414 2012
- Kim , Y.S. , Oh , C.Y. , Sung , W.Y. , Lee , B.K. , and Park , G.C. Optimal Design and Control of OBC-LDC Integrated Power Unit for Electric Vehicles Proc. IEEE Applied Power Electron. Conf. and Expo 2014 Fort Worth, TX 3192 3198
- Choi , J.M. , Byen , B.J. , Lee , Y.J. , Han , D.H. et al. Design of Leakage Inductance in Resonant dc-dc Converter for Electric Vehicle Charger IEEE Trans. Magn. 48 11 2012 4417 4420
- Kim , D.-H. , Kim , M.-J. , and Lee , B.-K. An Integrated Battery Charger with High Power Density and Efficiency for Electric Vehicles IEEE Trans. Power Electron. PP 99 Aug. 2016 1 1
- Tan , N. , Abe , T. , and Akagi , H. Design and Performance of a Bidirectional Isolated DC-DC Converter for a Battery Energy Storage System IEEE Trans. Power Electron. 27 3 1237 1248 2012