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The Development of the Water Management System Based on AC Impedance for Fuel Cell Hybrid Vehicles
Published May 20, 2009 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Spring Conference
Toyota has been developing the FCHV (Fuel Cell Hybrid Vehicle) since 1992. Currently, for commercialization, we are developing to improve the challenges that are still remaining, such as durability and reliability, environmental compatibility, lightweight, low cost, and a range. For both extension the range that was short compared to the internal combustion engine vehicles and improvement of the freezing environment compatibility that was weakness of the fuel cell system, we focused on one of the main parameters, the water balance of the fuel cell, and developed the onboard water content control system based on the AC impedance measurement. In this paper, the basic concept and applications of controlling water content, and the onboard AC impedance measurement system as the implementation are reported.