COOLING LIQUID, FILLING METHOD THEREOF AND COOLING SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a cooling liquid for a fuel cell which possesses low electroconductivity, anticorrosive property, high heat conductivity and nonfreezing property as the cooling liquid for a fuel cell stack. SOLUTION: This cooling liquid for a fuel cell stack comprises a base material made of a mixed solution consisting of water and glycols and an anticorrosive additive for maintaining the electroconductivity of the cooling liquid in such a way as to have low electroconductivity and also for maintaining the hydrogen ion exponent of the cooling liquid in such a way as to be approximately neutral. The anticorrosive additive may comprise at least either of an ethanolamine-based alkaline additive comprising triethanolamine, diethanolamine and monoethanolamine, and an acid additive selected from the group consisting of triazoles, phosphates and organophosphates.