Device for sufficiently utilizing hydrogen and oxygen of fuel cell

Abstract

This invention relates to a device for fully utilizing H2 and O2 of fuel cells including a H2 or O2 main pipeline, a H2 or O2 inlet pressure adjusting valve and a fuel cell stack, in which, the main pipeline is connected with the inlet and is set with a branch pipeline on the same direction, the other end of which is connected with the outlet of them, the inlet pressure adjusting valve adjusts the pressure of the H2 or O2 entering into the fuel cell stack to ensure that the H2 or O2 measurement ratio providing the stack is greater than 1.0 and the rest coming out from the outlet of the stack enters into the main pipeline by being absorbed by the branch one to be used in circulation.

Description

technical field [0001] The invention relates to a fuel cell, in particular to a device capable of making full use of hydrogen and oxygen in the fuel cell. Background technique [0002] An electrochemical fuel cell is a device that converts hydrogen and oxidants into electrical energy and reaction products. The internal core component of the device is the membrane electrode (Membrane Electrode Assembly, referred to as MEA). The membrane electrode (MEA) is composed of a proton exchange membrane and two porous conductive materials, such as carbon paper, sandwiched between the two sides of the membrane. On the two boundary surfaces of the membrane and the carbon paper, there are even and finely dispersed catalysts for initiating electrochemical reactions, such as metal platinum catalysts. Conductive objects can be used on both sides of the membrane electrode to draw the electrons generated during the electrochemical reaction through an external circuit to form a current loop. ...

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Problems solved by technology

[0020] (1) The processing requirements of ejector pumps are very high and difficult. For different flow requirements, different inlet and outlet pressure requirements and different injection pump volume requirements; the processing differences of ejector pumps are very large and cannot achieve versatility

[0021] (2) The inlet end of the ejector pump often requires a very high pressure of fuel or oxidant, and after passing through the ejector pump, the pressure at the outlet end suddenly drops, resulting in a large pressure difference between the inlet end and the outlet end of the ejector pump

When this pressure regulation control device fails, the pressure at the inlet end of the ejector pump will be equal to the pressure at the outlet end, causing the fuel cell to withstand ultra-high pressure and cause damage

[0022] (3) This automatic pressure adjustment device is mainly composed of a pressure sensor, a solenoid valve, and an electric control valve. It is a very expensive device and can easily lead to loss of control.

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