Fuel cell thermal management system and control method thereof

Abstract

The invention discloses a fuel cell thermal management system and a control method thereof, and belongs to the field of fuel cells. The thermal management system of the fuel cell comprises an electric pile, a thermostat, a heat dissipation part, a water pump, a water tank, a deionization tank and a normally open solenoid valve; the thermal management system of the fuel cell forms a loop L1 and a loop L3, and the loop L1 comprises the thermostat and the water pump; the L3 loop comprises a normally-open solenoid valve, a deionization tank and a water tank, an inlet of the water tank is connected with an inlet of the water pump, the deionization tank is connected between the water tank and the normally-open solenoid valve, and an outlet of the normally-open solenoid valve is connected with an outlet of the heat dissipation component. Due to the fact that the L3 loop and the L2 loop are connected in parallel in the starting process, the heat capacity is large, the warm-up time is long, and even cold starting fails, a normally-open electromagnetic valve is additionally arranged on the L3 loop, and the dynamic characteristic of the system can be improved by closing the L3 loop in the starting process. And in the conventional operation, the functions of reducing the conductivity, supplementing liquid and exhausting gas can be met by keeping the normally open solenoid valve open.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a fuel cell thermal management system and a control method thereof. Background technique [0002] The working principle of the proton exchange membrane fuel cell is that hydrogen and oxygen undergo an electrochemical reaction to generate water and output electricity at the same time. Since the voltage of fuel cell cells is usually less than 1V, in practical applications, it is necessary to connect hundreds of cells in series to form a fuel cell stack, and match the corresponding peripheral accessories to form a fuel cell system. [0003] The thermal management system is one of the key subsystems of the fuel cell, which undertakes the warm-up heat dissipation requirements to ensure the normal startup and operation of the stack. Moreover, since the fuel cell stack is a high-voltage component, in order to ensure the lower conductivity requirements of the thermal management system, a deion...

AI Technical Summary

Problems solved by technology

However, since the deionization tank is a maintenance part, it is more complicated to replace and maintain the deionization tank if it is placed in a small circulation loop.

[0005] Therefore, there is an urgent need to provide an easy-to-replace and safe fuel cell thermal management system and its control method to solve the technical problems in the prior art that the deionization tank is placed in a small circulation loop and the replacement and maintenance are relatively complicated

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