Integrated apparatus used for fuel cell humidifying

Abstract

The invention relates to an integrated device used for humidifying a fuel cell, which comprises humidifying reactors, a central flow plate and tail end plates. The humidifying reactors comprise a plurality of guide plates and a plurality of diaphragms, wherein each diaphragm adopts a pervious and air isolating diaphragm, a diaphragm is arranged between any two guide plates to form a humidifying unit, the humidifying units are longitudinally overlapped to form a humidifying part, the quantity of the humidifying reactors is at least two, the two groups of humidifying reactors are arranged on both sides of the central flow plate or the front part and the rear part, the left part and the right part, or the upper part and the lower part of one side of the central flow plate, a tail end plate is arranged at the other end of each group of humidifying reactor opposite to the central flow plate, the end plated, the at least two groups of humidifying reactors and the central flow plate are integrally installed, air, hydrogen gas and cooling water respectively enter into the humidifying reactors from the end plates of the central flow plate or each humidifying reactor, and then flow out of the humidifying reactors from the end plate of each humidifying reactor or the central flow plate. Compared with the prior art, the integrated device has the advantages that the flow resistance can be reduced, the integrated device is suitable for low pressure operation, the humidifying effect can be significantly enhanced, and the like.

Description

technical field [0001] The invention relates to a fuel cell, in particular to an integration method of a proton exchange membrane fuel cell with an internal humidifying device. Background technique [0002] An electrochemical fuel cell is a device that converts hydrogen fuel and oxidant 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...

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Problems solved by technology

[0017] However, the design of the above-mentioned humidifying device can only be suitable for the condition of relatively high pressure operation of the fuel cell. When the operating pressure is high, a single external humidifying device can easily reach the relative humidity required for the operation of the fuel cell. The amount of water taken away is much larger than when the operating pressure is high, and it is difficult for a single external humidification device to achieve the relative humidity required for fuel cell operation. If the length and width of the above humidification device are increased to meet the humidification requirements, the volume of the humidification stack Very large, the pressure loss is also large, and the humidification efficiency is very low

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