Small and light cryogenic high-pressure hydrogen storage power supply system

Abstract

The invention discloses a small and light cryogenic high-pressure hydrogen storage power supply system. The system comprises a hydrogen fuel cell, and also comprises a cryogenic high-pressure hydrogenstorage device for storing supercritical hydrogen, a heater, a pressure reducing valve and a storage battery, a hydrogen supply pipe of the cryogenic high-pressure hydrogen storage device is connected with an inlet of the heater through a pipeline, an outlet of the heater is connected with an inlet of the pressure reducing valve through a pipeline, an outlet of the pressure reducing valve is connected with a hydrogenation port of the hydrogen fuel cell through a pipeline, the hydrogen fuel cell is connected with the storage battery through a circuit, the hydrogen fuel cell can charge the storage battery, the storage battery is connected with the heater through a circuit, and the storage battery can supply power to the heater. The small and light cryogenic high-pressure hydrogen storage power supply system is long in cruising ability, light in weight, low in cost, safe, reliable and long in hydrogen storage maintaining time.

Description

technical field [0001] The invention relates to the field of hydrogen energy power supply, in particular to a small and light cryogenic high-pressure hydrogen storage power supply system based on cryogenic high-pressure hydrogen storage. Background technique [0002] At present, domestic small machines such as small unmanned aerial vehicles and unmanned ships are developing towards the direction of power supply by hydrogen energy, so a hydrogen storage power supply system is usually installed on small machines. The fuel cell is composed of a hydrogen storage device capable of storing hydrogen and supplying hydrogen to the hydrogen fuel cell. Existing hydrogen storage devices usually include high-pressure hydrogen storage devices, liquid hydrogen storage devices, and medium-sized cryogenic high-pressure hydrogen storage devices. [0003] Due to the limitation of hydrogen storage density, the high-pressure hydrogen storage device has relatively insufficient battery life, and ...

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Problems solved by technology

[0003] Due to the limitation of hydrogen storage density, the high-pressure hydrogen storage device has relatively insufficient battery life, and the quality requirements of the hydrogen storage container are very high under the high pressure of 70MP

[0004]Although the hydrogen storage density of the liquid hydrogen storage device has been greatly improved, after the liquid hydrogen storage device is miniaturized, due to the surface-to-volume ratio of the hydrogen storage container The increase makes it easier for the heat to be transferred to the hydrogen storage container, so that the evaporation rate of liquid hydrogen will be accelerated, and the flash steam generated will increase. If equipment is added to use the flash steam for power supply, the overall capacity of the liquid hydrogen storage device will be increased. In this way, the light weight of small machines will not be used; if the flash steam generated by evaporation is discharged into the air, due to the uncertainty of the external environment, it will easily cause greater risks and potential safety hazards

In addition, since liquid hydrogen is a liquid, it is subject to greater gravity constraints. During the operation of small machines, the liquid hydrogen may be far away from the outlet of the hydrogen storage container under the action of gravity, resulting in the situation that the liquid hydrogen cannot flow out. In order to ensure that the liquid hydrogen can flow out and increase booster equipment will increase equipment cost and weight

[0005]Medium-sized cryogenic and high-pressure hydrogen storage device, the inner tank of the cryogenic and high-pressure hydrogen storage bottle used for hydrogen storage in the device needs to add an air intake heat exchanger and an outer cylinder On the body, multi-layer insulation material insulation (MLI insulation) is required, and a coolant heat exchanger, secondary vacuum module, stop valve, safety valve, suspension, auxiliary system and other devices need to be integrated outside the cryogenic high-pressure hydrogen storage bottle. The structure of the device is very complicated, and the overall mass is relatively heavy. Due to its large weight and complexity, it cannot be directly reduced and transplanted to a small machine

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