Serial between-board current-track fuel battery current field board

A fuel cell and flow field plate technology, applied in fuel cells, fuel cell parts, battery electrodes, etc., can solve problems such as corrosion, poisoned catalysts, dangerous accidents, etc., to improve safety, avoid poisoning, and prolong service life Effect

Inactive Publication Date: 2008-01-09
SUN YAT SEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] It is known that the connections between the flow channels on two adjacent fuel / oxidant flow field plates in the current fuel cell stack are all in parallel (such as Chinese patent CN200410020906.6 published on January 11, 2006, Chinese patent CN99811792.7 published on November 14, 2001), this connection method is difficult to completely empty the reactants and products in the stack
The accumulation of reactants and products in the fuel cell stack will lead to the following adverse phenomena: (1) reduce the concentration of fuel / oxidant in the stack; (2) some products and impurities will poison the catalyst; (3) some generated substances and impurities have a corrosive effect on some components in the fuel cell; (4) may lead to uneven distribution of electricity, water, heat and fuel; (5) when the concentration of some products and impurities increases to a certain level, it may lead to dangerous accidents , such as combustion, explosion, etc., will also corrode some components

Method used

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  • Serial between-board current-track fuel battery current field board

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Embodiment 1

[0024] The area of ​​the bipolar plate is 80mm×30mm. The two sets of flow channels on the bipolar plate are arranged alternately in an AABBBBAA type (A and B are one section of flow channels in two different sets of flow channels). The flow of fuel / oxidant in the bipolar plate is as follows: the fuel / oxidant enters from the inlet 110 of flow channel 1 of the first bipolar plate, flows out from the outlet 120 of the flow channel, and then flows into the corresponding channel of the second bipolar plate. The flow channel inlet 140 enters, then flows out from the outlet 130, and enters the flow channel inlet 150 of the last bipolar plate, and the fuel / oxidant flows into the other side of the second bipolar plate from the flow channel outlet 250 of the last bipolar plate. The inlet 230 of the group flow channel (flow channel 2), then flows out from the outlet 240 of the flow channel and enters the flow channel 2 inlet 220 of the first bipolar plate, and the reactants and products ...

Embodiment 2

[0026] The effective area of ​​the bipolar plate is 100mm×40mm. The two groups of flow channels on the bipolar plate are arranged in a staggered manner, and the fuel flow channels are all serpentine (as shown in Figure 1 ), with a width of 3 mm and a depth of 0.8 mm. A fuel cell stack is assembled with this flow field plate. The fuel is hydrogen. Oxygen is used as the oxidizing agent. The catalyst uses 0.5mg / cm 2 Pt / C. 20 cells are connected in series. When the battery output voltage is 12V, the current is about 8A.

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Abstract

The invention is concerned with the interval channel in series fuel cell flow field board that made of double plate. It is to have series connection between the interval channels of the double plate, which the plate has two group of the fuel/oxidant interval channel, within the electricity stack that made of the plate; the fuel/oxidant runs in from the first fuel/oxidant double plate, through one interval channel group (100) out of the two to the last first fuel/oxidant double plate orderly, and then, passes through the other interval channel group (200) running backwards and expels from the first fuel/oxidant double plate.

Description

technical field [0001] The invention relates to the field of fuel cell technology, in particular to a series fuel cell flow field plate with inter-plate flow channels. Background technique [0002] A fuel cell is a power generating device that directly and continuously converts the chemical energy in fuel and oxidant into electrical energy. Fuel cells have the following advantages and advantages: (1) high energy conversion efficiency; (2) high specific energy and specific power; (3) high reliability, can be overloaded above the rated power or run below the rated power, and the efficiency changes (4) Little pollution, low noise, basically zero pollution to the environment; (5) Combined production of heat, electricity and pure water can be realized; (6) Strong adaptability. The application of fuel cells is of great significance for saving energy, protecting the environment and promoting the sustainable development of human society. [0003] The bipolar plate is the main comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M4/86H01M8/0258
CPCY02E60/50
Inventor 沈培康黄岳强
Owner SUN YAT SEN UNIV
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