Fuel cell with higher operation stability
A fuel cell and fuel cell stack technology, applied in fuel cells, circuits, electrical components, etc., can solve problems such as single cell performance degradation, over-humidification, and water blocking in diversion grooves, and achieve stable operation and even and appropriate humidification Effect
Active Publication Date: 2008-05-14
SHANGHAI MUNICIPAL ELECTRIC POWER CO +2
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Problems solved by technology
[0016] (1) When the flow rate of hydrogen and air delivered to the fuel cell stack changes greatly, for example, when the flow rate is small, it is easy to cause overhumidification, and when the temperature drops, it is easy to condense a small amount of liquid water before entering the fuel cell stack. This kind of liquid water will be brought into the fuel cell hydrogen diversion groove and air diversion groove respectively by wet hydrogen and humid air, resulting in water blocking of the diversion groove
Water blockage in the hydrogen diversion groove or water blockage in the air diversion groove of a single cell will cause the single cell to be in a starvation state of fuel hydrogen or insufficient air supply, and the performance of the single cell will drop sharply. reverse polarity and burn
[0017] (2) When the pressure of hydrogen and air delivered to the fuel cell stack fluctuates, such as when the pressure increases, it is easy to cause the humidified air with high relative humidity when the original pressure is small, and the hydrogen gas will condense when it enters the fuel cell stack. A small amount of liquid water will cause the same consequences as in (1) above
However, these measures still cannot completely prevent the occurrence of the above problems, and the battery operation is still not stable enough
Method used
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[0034] Such as figure 2 , and combined with figure 1As shown, a fuel cell with high operational stability includes a fuel cell stack 1, a hydrogen storage device 2, a hydrogen pressure reducing valve 3, a hydrogen pressure stabilizing valve 23, an air filter device 4, an air compression supply device 5, a A hydrogen water-steam separator 6, a first air water-steam separator 6', a water tank 7, a cooling fluid circulation pump 8, a radiator 9, a hydrogen circulation pump 10, a hydrogen humidification device 11, an air humidification device 12, The second hydrogen water-steam separator 13, the second air water-steam separator 14, the first hydrogen water-steam separator 6 is arranged at the hydrogen outlet end of the fuel cell stack 1, the first air water - The steam separator 6' is arranged at the air outlet end of the fuel cell stack 1, the second hydrogen water-steam separator 13 is arranged at the hydrogen inlet end of the fuel cell stack 1, and the second air water-steam ...
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Abstract
This invention relates to fuel battery with high running stability, which comprises fuel battery stack, hydrogen storage device, hydrogen reducing valve, hydrogen stable pressure valve, air filter device, air compression supplying device, first and second hydrogen water-steam separators, first and second air water-steam separators, water tank, cooling liquid circulating pump, radiator, hydrogen circulating pump, hydrogen and air humidification devices; wherein, arranging the second hydrogen water-steam separator and second air water-steam separator separately on hydrogen inlet and air inlet of fuel battery. Compared with existing technique, the invention makes the entered air and hydrogen without water and ensures the running stability of fuel battery.
Description
technical field [0001] The present invention relates to a fuel cell, in particular to a fuel cell with high operating stability. 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. [0003] At the anode end ...
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IPC IPC(8): H01M8/00H01M8/04119
CPCY02E60/50
Inventor 胡里清夏建伟章波郭伟良
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO