World Electric Vehicle Journal (May 2019)

Auxiliary Power Supply System for Electric Power Steering (EPS) and High-Heat-Resistant Lithium-Ion Capacitor

  • Takumi Mio,
  • Yukihiro Komatsubara,
  • Naoki Ohmi,
  • Yusuke Kimoto,
  • Kentaro Iizuka,
  • Tomoki Suganuma,
  • Shun Maruyama,
  • Toyoki Sugiyama,
  • Fumihiko Sato,
  • Satoshi Shinoda,
  • Tokuaki Hibino,
  • Koji Nishi

DOI
https://doi.org/10.3390/wevj10020027
Journal volume & issue
Vol. 10, no. 2
p. 27

Abstract

Read online

Advanced Driver Assistance System (ADAS) and Automated Driving (AD) are the two major topics for the current and next generations of vehicles. To realize them in full-size vehicles equipped with a 12 V power supply, the need for electric power steering (EPS) is increasing. Currently, the steering system of full-size vehicles is equipped with hydraulic power steering due to electric power shortage. An auxiliary power supply system using a lithium-ion capacitor was developed in order to solve the concern. In addition, to mount the system in the vehicle with no cooling−heating equipment, development of expanding the operating temperature range of the lithium-ion capacitor was conducted. Several improvements have made the capacitor operate stably in high-temperature environments above 100 °C.

Keywords