Cooling liquid circulation system for fuel cell

Abstract

The invention provides a cooling liquid circulation system for a fuel cell, the fuel cell comprises an electric pile. The cooling liquid circulation system comprises a cathode fuel supply loop connected with the electric pile, wherein the cathode fuel supply loop is internally provided with a humidifier; a water-steam separating and pressurizing device which is connected with the humidifier; and a cooling liquid circulation loop which is connected with the electric pile; wherein a replacement device is arranged in the cooling liquid circulation loop, the replacement device is connected with the water-vapor separating and pressurizing device, and the water-vapor separating and pressurizing device can separate and collect water produced by the electric pile and waste gas discharged by the cathode fuel supply loop, and pressurize the separated water; the pressure of the water is kept consistent with the pressure of the cooling liquid circulation loop, and then the water separated by the water-vapor separating and pressurizing device and the cooling liquid in the cooling liquid circulation loop can be replaced in real time through the replacement device, so that real-time replacement of the cooling liquid is completed.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a cooling liquid circulation system for fuel cells. Background technique [0002] In recent years, as an environmentally friendly energy source, fuel cells have been used more and more widely. The reaction mechanism of the fuel cell is that the catalyst decomposes the hydrogen at the anode and the oxygen at the cathode into ions. The hydrogen ions at the anode reach the cathode through the proton exchange membrane, and the electrons reach the cathode through an external circuit and combine with the oxygen ions at the cathode to generate heat. The reaction of the fuel cell is an electron exchange process. If the ion concentration of the fuel cell coolant is high, it will corrode the stack and cause the insulation performance of the stack to be greatly reduced. The voltage generated by the fuel cell for automobiles is high, which poses a safety hazard. As the fuel cell system w...

AI Technical Summary

Problems solved by technology

The reaction of the fuel cell is an electron exchange process. If the ion concentration of the fuel cell coolant is high, it will corrode the stack and cause the insulation performance of the stack to be greatly reduced. The voltage generated by the fuel cell used in automobiles is high, which poses a safety hazard.

As the fuel cell system works longer and longer, various impurities will penetrate into the cooling system, and the ion concentration of the coolant will gradually increase, thereby reducing the insulation performance and service life of the fuel cell, which requires regular replacement. Ionized water (coolant), which affects the normal use of the fuel cell, and the replacement efficiency is low

In addition, the cooling system circuit of the existing fuel cell is equipped with a deionizer, which leads to a high cost of the fuel cell

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