Three-stage filling method of vehicle-mounted hydrogen cylinder based on intelligent prediction and control

Abstract

The invention relates to a three-stage filling method for vehicle-mounted hydrogen cylinders based on intelligent prediction and control, and belongs to the field of fuel cell vehicles. Solve the single inefficient hydrogenation problem of the current vehicle-mounted hydrogen cylinder through intelligent prediction and control. The intelligent prediction is carried out before the actual filling. According to the initial residual pressure of the gas cylinder and the current ambient temperature, a set of switching coefficients when filling hydrogen in a medium and low pressure hydrogen storage cylinder is determined, and then combined with the pre-cooling system to calculate and predict the safety The fastest hydrogenation scheme and the most economical hydrogenation scheme and their corresponding target temperature rise curves of the two hydrogenation schemes. Finally, the control algorithm is used to control the output of the pre-cooling system during the real-time filling process to make the actual temperature rise curve fit. Target temperature rise curve to achieve fast, efficient and safe hydrogenation targets.

Description

technical field [0001] The invention belongs to the field of fuel cell vehicles and relates to a three-stage filling method for vehicle-mounted hydrogen cylinders based on intelligent prediction and control. Background technique [0002] At present, environmental and energy issues are becoming more and more prominent, and the further development of traditional vehicles is greatly restricted, which greatly promotes the research and development of new vehicles, and fuel cell vehicles have become a strong competitor for new vehicles due to their various advantages. As the main energy source of fuel cell vehicles, hydrogen is mainly stored in the form of high-pressure gas, and the safety of hydrogen in the fueling process limits the commercial development of fuel cell vehicles. Safe, fast and efficient filling, high-pressure hydrogen fast filling has become a hot research topic at home and abroad. During the rapid hydrogenation process of the vehicle-mounted hydrogen cylinder, ...

AI Technical Summary

Problems solved by technology

During the rapid hydrogenation process of the vehicle-mounted hydrogen cylinder, due to the unique negative Joule-Thompson effect of hydrogen and the rapid compression of hydrogen, the internal temperature of the cylinder will rise sharply, causing safety hazards

The traditional hydrogen filling scheme is single, inefficient and non-selective, without considering the switching point of hydrogen filling in low- and medium-pressure storage hydrogen cylinders, and the refrigeration output is not optimized during the filling process, resulting in low economic efficiency

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