Leakage fusion detection system and method for vehicle-mounted hydrogen supply system

Abstract

The invention provides a leakage fusion detection system and method for a vehicle-mounted hydrogen supply system. The system comprises a hydrogen storage bottle, a bottle opening valve, a hydrogen supply pipeline, a fuel cell stack, an exhaust recovery system, and a leakage fusion detection system. The leakage fusion detection system comprises a controller, a hydrogen sensor array, a pressure sensor, a temperature sensor, an ultrasonic sensor array, a gas mass flow sensor and an alarm lamp; and according to a grading result of a hydrogen leakage fusion detection criterion II, whether large leakage or small leakage exists in the vehicle-mounted hydrogen supply system or not is determined, then a hydrogen leakage position is judged according to a positioning result, and according to the leakage position, the alarm lamp gives an alarm in different modes. The fusion detection method adopted by the invention can enhance the accuracy of hydrogen leakage detection.

Description

technical field [0001] The invention relates to the technical field of fuel cell vehicles, in particular to a leakage fusion detection system and method for a vehicle-mounted hydrogen supply system. Background technique [0002] Worldwide climate change, environmental pollution and energy shortage are becoming major factors restricting the development of the automobile industry, and the development of new energy vehicles is imperative. The fuel cell is a power generation device that can convert chemical energy into electrical energy. It has the advantages of less moving parts, low noise, low pollution, and high energy conversion, making the fuel cell more suitable as a power source for electric vehicles. The Ministry of Industry and Information Technology, the Ministry of Science and Technology and various local governments have listed hydrogen fuel cell vehicles as key areas of support. However, the current industry as a whole has insufficient awareness of the safety of fu...

AI Technical Summary

Problems solved by technology

However, the current industry as a whole lacks awareness of the safety of fuel cell vehicles

In order to increase the cruising range of fuel cell vehicles, most fuel cell vehicles currently use a 70MPa high-pressure hydrogen storage system, which increases the risk of hydrogen leakage, especially in the case of accidental leakage of the hydrogen storage system (such as vehicle collision leakage, etc.), the flow rate of hydrogen leakage will If it is too fast, the concentration of hydrogen diffusion is high, and if it encounters a spark, it will cause a fire or even an explosion, endangering the safety of personnel and property

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