Hydrogen supply system, fuel cell engine and vehicle

Abstract

The invention discloses a hydrogen supply system, a fuel cell engine and a vehicle, which relate to the technical field of fuel cell vehicles. The hydrogen supply system comprises a hydrogen supply pipeline, ahydrogen circulating pipeline and an exhaust valve, wherein thehydrogen supply pipeline is provided with a hydrogen heater and an injection ejector, a gas inlet of the hydrogen heater is configured to be communicated with a hydrogen supply source, a gas outlet of the hydrogen heater is communicated with an inlet of the injection ejector, and an outlet of the injection ejector is configured to be communicated with an anode inlet of an electric pile; the inlet end and the outlet end of the hydrogen circulating pipeline are configured to be respectively communicated with the anode outletof the electric pile and the inlet of the injection ejector; one end of the exhaust valve is communicated with the hydrogen circulating pipeline, and the other end of the exhaust valve is communicated with the outside of the hydrogen supply system. When the hydrogen supply system supplies hydrogen to the electric pile, the working requirements of the fuel cell engine under all working conditionscan be met, the power consumption is low, the hydrogen supply quality can be ensured in the long-term use process, and the reaction efficiency of the galvanic pile is ensured.

Description

technical field [0001] The invention relates to the technical field of fuel cell vehicles, in particular to a hydrogen supply system, a fuel cell engine and a vehicle. Background technique [0002] As a new energy vehicle, fuel cell vehicles have broad development prospects due to their high efficiency and zero emissions. Fuel cell engine scheme design is the core technology of fuel cell vehicles, which determines the performance and life of fuel cell vehicles. A fuel cell engine mainly includes a stack, an air supply system, a hydrogen supply system, and a water and heat management system. Among them, the hydrogen supply system mainly includes a hydrogen supply pipeline and a hydrogen circulation pipeline. Specifically, the hydrogen supply pipeline is connected to the stack to continuously supply high-purity hydrogen from the hydrogen supply source to the stack to ensure the normal progress of the electrochemical reaction in the stack. The hydrogen circulation pipeline i...

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Problems solved by technology

[0004] However, the above settings have the following problems: (1) when the hydrogen circulation pump is used, additional energy consumption will be generated, and the noise and vibration are relatively large; (2) when the ejector is used, although it can avoid the hydrogen circulation pump with However, parameters such as the hydrogen supply flow rate cannot be adjusted, which cannot meet the working requirements of the fuel cell engine under all working conditions; (3) No matter whether a hydrogen circulation pump or an ejector is used, during the hydrogen circulation process, the hydrogen produced by the stack Impurities such as nitrogen will be mixed into the hydrogen circulation pipeline, and then the hydrogen mixed with impurities will enter the stack. Long-term use will reduce the reaction efficiency of the stack

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