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Ion exchange film fuel cell dipole plate and application thereof

A technology of ion exchange membranes and fuel cells, which is applied in the direction of fuel cells, fuel cell groups, fuel cell components, etc., can solve problems such as complex structure, unstable electrical performance, and difficult processing, and achieve the effect of simplifying the integrated system

Inactive Publication Date: 2007-08-22
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] 1. There are many stack components, resulting in high total contact resistance and unstable electrical performance
[0020] 2. The large number of stack components makes it difficult to seal the battery, and the air tightness is poor
[0021] 3. The mechanical strength of the flow field plate is poor
[0022] 4. Complex structure and difficult processing
[0023] 5. The fixed part of the fuel flow field plate and the oxidant flow field plate becomes the weak part of the fuel cell stack due to the different thermal expansion coefficients of different materials and electrochemical corrosion, which reduces the life of the battery

Method used

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  • Ion exchange film fuel cell dipole plate and application thereof
  • Ion exchange film fuel cell dipole plate and application thereof

Examples

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Effect test

Embodiment 1

[0044] A graphite plate is used to shape the above bipolar plate in an engraving manner, and the effective area is 54mm×18mm. The fuel flow channel 9 is serpentine. The oxidant inlet 4 and the oxidant outlet 5 are both square in shape and equal in number.

Embodiment 2

[0046] The graphite plate is used to form the above bipolar plate by machine tool processing, and the effective area is 80mm×30mm. The fuel flow channel 9 is serpentine with a width of 1.5 mm and a depth of 0.5 mm. The oxidizing agent channel 10 has a width of 1.5mm and a depth of 1.5mm. The single hole area of ​​oxidant inlet 4 and oxidant outlet 5 is 2mm 2 , are all square in shape and equal in number. The depth of the sealing groove 7 is 0.2 mm. The moisture retention groove 12 has a width of 0.5mm and a depth of 0.2mm.

Embodiment 3

[0048] The expanded graphite plate is used to shape the bipolar plate by machine tool processing, and the effective area is 50mm×20mm. The fuel flow channel 9 is checkerboard-shaped, with a width of 2 mm and a depth of 0.5 mm. The oxidant channel 10 has a width of 2mm and a depth of 1.5mm. The single hole area of ​​oxidant inlet 4 and oxidant outlet 5 is 2.5mm 2 , are all circular in shape and equal in number. The depth of the sealing groove 7 is 0.3mm. The moisture retention groove 12 has a width of 0.8 mm and a depth of 0.2 mm.

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Abstract

This invention provides a dual-pole plate of an ionic exchange film fuel cell and its application, in which, two ends of fuel flow channel set at the fuel reaction region are connected with the inlet and outlet of fuels, one side of the dual-pole plate is opened with a raw of oxidant inlets and the other side has a raw of outlets connected to each other by the oxidant flow channel passing through the dual-pole plate from a side, sealing grooves are set around the fuel reaction region and the oxidant reaction region and applied by spring sealing pieces, th dual-pole plate can be molded at one run carrying an insulation board, a collection board, a plate of the fuel end, membrane electrodes, dual-pole plates, film electrode, an end board, collector, and insulation board of the oxidant end to be sealed layer by layer to be connected and fastened to form a fuel cell stack.

Description

technical field [0001] The invention relates to fuel cell technology, in particular to an ion-exchange membrane fuel cell bipolar plate and a method for assembling the fuel cell stack. technical background [0002] A fuel cell is a power generating device that directly and continuously converts the chemical energy in fuel and oxidant into electrical energy. The fuel cell does not need to be charged, as long as the fuel is directly input into the fuel cell system, the fuel cell will output electrical energy. It has a series of advantages such as high energy conversion efficiency, clean, easy to start, low noise, flexible and convenient, and can realize cogeneration of heat, electricity, and pure water. It can be used in aerospace, aviation, navigation, power stations, electric vehicles, and portable equipment power supplies As well as small mobile devices such as mobile phones, it is generally believed that fuel cells will become one of the new power sources in the 21st cent...

Claims

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Application Information

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IPC IPC(8): H01M8/02H01M4/86H01M8/24H01M8/0202H01M8/026H01M8/0263H01M8/1004H01M8/2465
CPCY02E60/50
Inventor 沈培康黄岳强李永亮梁剑莹
Owner SUN YAT SEN UNIV
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