THERMOCOUPLE FOR MEASURING INTERNAL TEMPERATURE OF STACK IN FUEL CELLS

摘要

PURPOSE: A thermocouple for measuring the internal temperature of a stack in a fuel cell is provided to prevent the electric current flow between a stack and a separator of the fuel cell by incorporation of an insulating tube and a protection tube. CONSTITUTION: A thermocouple for measuring the internal temperature of a stack in a fuel cell comprises the following: a TC junction unit(10) for measuring temperature; a TC wire(20) connected to the TC junction unit; a first ceramic insulator(30) installed on the outer circumference of the TC wire to electrically insulate the TC wire; a sleeve(40) installed on the outer circumference of the ceramic insulator; an external thermocouple insulator(50) installed on the outer circumference of an extended portion of the TC wire and the ceramic insulator; and an external thermocouple tube(60) installed on the outer circumference of the external thermocouple insulator.