A fuel cell air supply system and pressure relief control method thereof

Abstract

The invention relates to the technical field of fuel cell control, in particular to a fuel cell air supply system and a pressure relief control method thereof. It includes a fuel cell cathode, an air compressor connected to the fuel cell cathode inlet, and a tail discharge valve connected to the fuel cell cathode outlet, and is characterized in that: a valve for adjusting the fuel cell cathode inlet pressure relief valve; a back pressure valve for regulating the outlet pressure of the fuel cell cathode is provided between the outlet of the cathode of the fuel cell and the tail discharge valve; it also includes a pressure relief valve electrically connected with the back pressure valve for controlling the discharge The pressure relief control device for the opening and closing of the pressure valve and the opening of the back pressure valve. The invention not only improves the pressure relief efficiency, but also can fundamentally solve the problem of water blockage inside the cathode of the fuel cell.

Description

Technical field [0001] The present invention relates to the field of fuel cell control, and in particular to a fuel cell air supply system and a pressure relief control method thereof. Background technique [0002] A fuel cell is a chemical device that directly converts the chemical energy of the fuel into electrical energy, also known as electrochemical generators. It is a fourth power generation technology after hydraulic power generation, thermal power generation and atomic power generation. Since the fuel cell is converted into electrical energy by electrochemical reaction to convert the Gibbs free energy portion of the fuel into electrical energy, it is not limited by the Carno cycle effect, therefore high efficiency; additional, fuel cell fuel and oxygen as reaction materials, At the same time, there is no mechanical transmission component, so there is no noise, and the harmful gas pollution is extremely low. It can be seen that from the perspective of saving energy and pro...

AI Technical Summary

Problems solved by technology

The existing technology usually does not take into account how to remove excess water from the cathode. For example, in the Chinese invention patent entitled "Fuel Cell Air Circuit, Air Extraction Device Control Method and Controller" with the patent number "CN201910914732.4", the patent The control method introduced takes into account the need for pressure relief, but this method is to directly release the pressure through the air extraction device, but does not fully consider how to discharge excess water while releasing the pressure

And if the excess water in the cathode is not discharged in time, the problem of pressure exceeding the limit will appear again in subsequent use.

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