Cooling liquid composition for fuel cell

Abstract

A coolant composition for a fuel cell unit, which contains at least one aliphatic alcohol having unsaturated bonds in the molecules having 2 to 20 carbon atoms each. The coolant composition maintains the electrical conductivity of the coolant at 10 μS / cm or below as well as the fluctuation of the electrical conductivity within the range of 0 to 10 μS / cm.

Description

RELATED APPLICATION

[0001] This application is a continuation of PCT Application No. PCT / JP2003 / 016646 filed Dec. 24, 2003 which claims priority to PCT Application No. PCT / JP2003 / 008879 filed Jul. 11, 2003, each of which are hereby incorporated by references herein.TECHNICAL FIELD

[0002] The present invention relates to a coolant composition for fuel cells, and specifically to such a coolant composition for automobiles. In particular, the present invention relates to a coolant composition that provides an excellent antifreeze property and is capable of maintaining the electrical conductivity of the coolant adequately low for a long period of time. BACKGROUND TECHNOLOGY

[0003] Generally a fuel cell unit which generates electrical power is provided as a stack of a plurality of fuel cells. During power generation, heat is generated from the fuel cells. To cool the fuel cell unit, a cooling plate is inserted between every few fuel cells.

[0004] A fluid path for coolant is provided in ea...