Fuel cell and cold start control method thereof

Abstract

The invention discloses a fuel cell and a cold start control method thereof. The fuel cell comprises an electric pile; a gas inlet pipeline for inputting gas into the electric pile; an exhaust pipeline for exhausting heat and residual gas in the electric pile; a backflow pipeline; and a controller which can control the opening degree of the three-way valve according to the temperature of the electric pile, wherein one end of the backflow pipeline is communicated with the exhaust pipeline through a three-way valve, and the other end of the backflow pipeline is communicated with the gas inlet pipeline so as to guide heat and residual gas into the gas inlet pipeline . In the cold starting process of the fuel cell, heat generated by the electric pile can be fully recycled, so that the fuel cell can increase the starting temperature by virtue of the heat generated by the fuel cell so as to realize cold starting, the cold starting performance of the fuel cell is greatly improved, and the cold starting time is shortened. Meanwhile, the backflow pipeline can realize cyclic utilization of oxygen while realizing cyclic utilization of heat, so that the fuel utilization rate is improved, the clean energy concept is met, the efficiency of a fuel cell engine is also improved, and the hydrogen consumption is reduced.

Description

technical field [0001] The present invention relates to the technical field of fuel cells, in particular to a fuel cell, and also relates to a cold start control method for the fuel cell. Background technique [0002] The low-temperature cold start capability of the fuel cell is an important technical index, and it is also a difficult problem restricting the working performance of the fuel cell. At present, the starting of the fuel cell at low temperature is to use the storage battery to supply power to the heating device, and use the heating device to heat the fuel cell to make the fuel cell reach the starting temperature. However, under low temperature conditions, the working performance and efficiency of the battery are also very low, and there are cases where it cannot be used under certain low temperature conditions, resulting in the inability of the fuel cell to achieve cold start. Moreover, the way of cold start with the help of the battery will consume additional en...

AI Technical Summary

Problems solved by technology

However, under low temperature conditions, the working performance and efficiency of the battery are also very low, and there are cases where it cannot be used under certain low temperature conditions, resulting in the inability of the fuel cell to achieve cold start.

Moreover, the method of cold start with the help of the battery will consume additional energy, which is not in line with the concept of energy saving and environmental protection

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