A fuel cell vehicle energy-saving air supply system

Abstract

A fuel cell automobile energy-saving air supply system belongs to the energy-saving technical field of automobiles. A hydrogen pressure sensor of that system is arrange on the pipeline between the decompression solenoid valve and the multi-purpose compressor, and an air pressure sensor is arranged on the pipeline where the multi-purpose compressor discharge compressed air; When the hydrogen pressure passing through the relief solenoid valve is insufficient to propel the multi-purpose compressor to work, or when the air outlet pressure sensor detects that the air outlet pressure is lower than the air pressure set by the PLC controller, the control system starts the multi-purpose compressor power supply system, drives the multi-purpose compressor with electric energy, compresses hydrogen andair at the same time, and ensures the gas supply of the fuel cell stack. The system is simple in structure, small in occupying space and easy to be integrated. By using the pressure energy of the high pressure hydrogen cylinder, the air compression device is pushed to pressurize the atmospheric air so as to use air in the hydrogen fuel cell stack, and the pressure energy of the hydrogen is directly converted into the pressure energy of the air, which greatly improves the energy utilization rate.

Description

technical field [0001] The invention relates to an energy-saving gas supply system for a fuel cell vehicle, which belongs to the technical field of energy-saving in new energy vehicle systems. Background technique [0002] Fuel cell vehicles that use hydrogen as fuel must have oxygen in addition to hydrogen. Hydrogen is generally a compressed gas with high pressure. It is stored in high-pressure cylinders, and its storage pressure can reach 70MPa; oxygen generally comes from air, and compressors, blowers and other machinery with compression properties are usually used to overcome the flow of fuel cells. Channel and pipeline resistance, transport the air containing oxygen to the fuel cell cathode flow channel, so that the oxygen has a certain kinetic energy to pass through the fuel cell cathode catalytic layer, and carry out related electrochemical reactions. [0003] Compressing air with transmission machinery such as compressors and blowers needs to consume the power gener...

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Problems solved by technology

However, it is worth noting that the pressure energy recovered by the system is provided by the air compressor. The energy recovery efficiency of this method is extremely low, which not only wastes the electric energy generated by hydrogen, but also increases the complexity of the system.

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