Patent ID: 7947171

Claim:
A cooling device for a fuel cell, comprising: a fuel cell stack heated in generating power by supplying oxygen and hydrogen; a radiator which radiates heat in a cooling liquid to cool the fuel cell stack; a cooling liquid circulation passage to circulate the cooling liquid between the fuel cell stack and the radiator; an ion removal filter interposed in the cooling liquid circulation passage to remove ions in the cooling liquid, wherein the ion removal filter comprises: a replaceable filter cartridge in which an ion exchange resin is installed; a vessel main body having an opening to receive the replaceable filter cartridge therein; and a lid to close the opening of the vessel main body; and a reservoir tank disposed in the cooling liquid circulation passage to reserve a predetermined amount of the cooling liquid, wherein the reservoir tank is disposed in the cooling liquid circulation passage so that a level of the cooling liquid inside the reservoir tank corresponds to a highest level of the cooling liquid in the cooling liquid circulation passage, and the opening of the vessel main body is disposed in a higher position than a highest level of the cooling liquid in the reservoir tank, wherein a cooling liquid inlet pipe, to be connected to the cooling liquid circulation passage, is disposed at a bottom of the vessel main body to be connected to a cooling liquid inlet of the filter cartridge in the ion removal filter, and a cooling liquid outlet pipe, to be connected to the cooling liquid circulation passage, is connected to the lid of the vessel main body to be connected to a cooling liquid outlet of the filter cartridge in the ion removal filter whereby the cooling liquid flown through the cooling liquid inlet pipe into the vessel main body passes through the ion exchange resin in the filter cartridge where a conductivity of the cooling liquid to be maintained at less than a predetermined value and is discharged from the cooling outlet pipe and thereafter, is introduced into the reservoir tank.