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Downsizing Technology for FC Cooling System Installation under Front Hood

Article of Honda R&D Technical Review Vol.31 No.1

Summary

Technology for downsizing the fuel cell cooling system was developed in order to realize installation of the fuel cell power plant under the front hood of the CLARITY FUEL CELL. The fuel cell stack was downsized by accurately estimating the amount of corrosion current by using technology for predicting corrosion of the metal separator, decreasing the conductivity of the coolant, and removing the insulation rubber from the cell. For the fuel cell cooling device, the conductivity of the coolant was set within a range that would enable piping to be shorter and not necessitate the large-scale coolant pump used when a pressure drop increase occurred. In the fuel cell cooling system, the conductivity of the coolant was decreased within the range that would make a large contribution to downsizing the fuel cell stack and the fuel cell cooling device. In order to decrease the conductivity of the coolant, a fuel cell cooling system was built that would decrease ion dissolution from parts, inhibit degradation of the coolant, and constantly remove dissolved ions. These measures achieved a fuel cell cooling system that was downsized 20% over the previous model and succeeded in realizing the world’s first five-passenger fuel cell vehicle in a sedan package.

Reference

(1) Kimura, K., Kawasaki, T., Ohmura, T., Atsumi, Y., Shimizu, K.: Development of New Fuel Cell Vehicle CLARITY FUEL CELL, Honda R&D Technical Review, Vol. 28, No. 1, p. 1-8
(2) Kimura, Y., Oyama, S., Giga, A., Okonogi, D.: Development of New FC Separator for CLARITY FUEL CELL, Honda R&D Technical Review, Vol. 29, No. 2, p. 51-56
(3) Hama, Y., Goto, S.: Prediction Technology for Stainless Steel Bipolar Plates Corrosion between Cells in Fuel Cells, JSAE Annual Congress Proceedings, No. 46-18, p. 1-6, (2018) (in Japanese)

Author (organization or company)

Yuki HAMA(Automobile R&D Center)、Daiki NAGATA(Automobile R&D Center)、Shuhei GOTO(Automobile R&D Center)、Ken TAKAHASHI(Automobile R&D Center)

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