A method for balancing the water in the proton exchange film fuel battery via the dual-electrode plate

A proton exchange membrane and fuel cell technology, which is applied in the parts of fuel cells, solid electrolyte fuel cells, fuel cells, etc., can solve the problem that the humidification of PEMFC and the discharge of product water cannot be completed at the same time, and the pore size and pore size distribution are difficult to be accurate. Control, large gas pressure drop and other problems, to achieve the effect of good humidification, quick start at low temperature, and prevention of interpenetration

Inactive Publication Date: 2007-08-15
WUHAN UNIV OF TECH
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[0011] Trung V (J. Electrochem. Soc., 1996, 143: L103) and Finland's Energy Partners (US6207312B1, WO00/17952) combined the interdigitated flow field with the closed flow channel to improve the gas utilization rate , strengthen the convective mass transfer and diffusion mass transfer of the reaction gas in the diffusion layer, so that the water generated by the reaction is driven by the gas flow on both sides of the membrane, and the forced convective reaction gas transfers water in the membrane along the directi

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  • A method for balancing the water in the proton exchange film fuel battery via the dual-electrode plate

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[0033] Now in conjunction with Fig. 1, the present invention will be further described.

[0034] A method for maintaining the balance of water in a proton exchange membrane fuel cell through a bipolar plate, the realization of the present invention must be completed in the electric stack of a proton exchange membrane fuel cell (PEMFC), and the electric stack of a proton exchange membrane fuel cell includes 2-40 single battery, each single cell contains a three-in-one electrode, a diffusion layer, and a bipolar plate. The three-in-one electrode is composed of a hydrogen electrode catalyst 2, a proton exchange membrane 1 and an oxygen electrode catalyst 3, and the diffusion layer is composed of a hydrogen diffusion layer 5 and an oxygen diffusion layer. The bipolar plate is composed of a hydrogen plate and a water oxygen plate; the hydrogen electrode catalyst of each single cell is adjacent to the hydrogen diffusion layer, and the oxygen electrode catalyst is adjacent to the oxyg...

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Abstract

The invention relates to keep water balance for proton exchange film fuel cell. Wherein, selecting a bipolar plate contained hydrophilic gel pore; when the cell runs, filling H2 and O2 through two surfaces of the plate, and the cooling water on middle of the plate; in virtue of the cooling water in pipe, adjusting the pressure of reacting gas and water to humidify the fuel cell and discharge the yield water. This invention adjusts the humidification level according to cell output power and has well effect to H2 and O2, is simple both on operation and assembly, and runs stably and durably.

Description

technical field [0001] The invention relates to a method for maintaining water balance in a proton exchange membrane fuel cell. Background technique [0002] Water management is an important issue affecting the practicality of proton exchange membrane fuel cell (PEMFC) technology. During the operation of PEMFC, maintaining the balance of water in PEMFC plays an important role in improving the power of PEMFC, optimizing fuel efficiency, life and safety of PEMFC. plays a key role. The water management of PEMFC mainly includes two aspects: one is to humidify the proton exchange membrane (to prevent the dehydration of the proton exchange membrane and lose the proton conductivity), and the other is to remove the product water of the cathode (to prevent the electrode from being flooded and blocking the gas channel). ), to maintain the water balance in PEMFC. [0003] Proton exchange membrane is one of the core components of PEMFC. Perfluorosulfonic acid membrane is currently the...

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Application Information

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IPC IPC(8): H01M8/04H01M8/02H01M4/86H01M8/10H01M8/24H01M8/0258H01M8/04119H01M8/04828
CPCY02E60/521Y02E60/50
Inventor 沈春晖黄丹峰潘牧
Owner WUHAN UNIV OF TECH
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