Fuel cell cold starting device and method thereof

Abstract

According to a fuel cell cold starting device and a method thereof, a first gas path system, a second gas path system and a heating assembly are all controlled by a central control system. During cold start, the first gas path system generates heat through compressed air to heat a cathode of a fuel cell stack, the second gas path system conveys hydrogen to enable the fuel cell stack to perform hydrogen-oxygen reaction heat release, and meanwhile, the heating assembly receives a power signal to perform heating. Through the above three heating processes, the fuel cell system, especially a fuel cell stack, is rapidly heated, so that the temperature value and the internal resistance value of the fuel cell system reach numerical values required by cold start, cold start in a short time is rapidly realized, the time required by cold start is shortened, and the efficiency is high; besides, during shutdown, air and hydrogen are adopted to blow the system at the same time to dry residual moisture, and whether the humidity in the system meets the requirement or not is judged by monitoring the rising condition of the internal resistance value, so that blowing is controlled to be stopped, and conditions are created for next cold start.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a fuel cell cold start device and method. Background technique [0002] Fuel cell is a clean energy technology with good economic and social benefits. It is widely used in small and medium-sized power stations, electric vehicles and backup power, and has broad application prospects. The working performance of the fuel cell system is largely related to the temperature, and the optimum working temperature of the fuel cell stack is 40-60°C. When the temperature of the external environment is too low, it takes a long time for the fuel cell to achieve the best working performance, and the residual water in the fuel cell system may even condense into ice and block the pipes, resulting in the failure of the fuel cell system to start normally. At present, there are two commonly used methods for cold start of fuel cells: the first is to heat the cooling water to achieve lo...

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Problems solved by technology

[0004] In view of this, an embodiment of the present invention provides a fuel cell cold start device and its method, aiming to solve the problems of low efficiency and long cold start time in the traditional fuel cell cold start technical solution

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