Combined dual-polar plate for fuel cell
A fuel cell and bipolar plate technology, used in fuel cells, fuel cell parts, battery electrodes, etc., can solve the problems of easy corrosion, short service life, long processing time, etc., achieve good corrosion resistance, reduce manufacturing cost effect
Inactive Publication Date: 2009-06-24
YUAN ZE UNIV
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Problems solved by technology
[0003] 1. High manufacturing cost
Existing carbon-carbon composite materials are used in bipolar plates of fuel cells. Although they have excellent power generation efficiency, the manufacturing cost is too high. If the cost of a single bipolar plate is several thousand NT dollars, ten bipolar plates Stacked fuel cells cost tens of thousands of NT dollars, which is disproportionate to the generated electricity, resulting in low market competitiveness, let alone the popularization of fuel cells
[0004] 2. Easy to corrode
Existing metal bipolar plates are prone to oxidation or corrosion when exposed to the water and heat generated by the fuel cell for a long time, affecting the flow of fluid in the flow channel, resulting in unstable power supply or short service life
[0005] 3. Unable to mass-produce complex microstructure products
When the bipolar plate has a complex microstructure, whether it is a carbon-carbon bipolar plate or a metal bipolar plate, the manufacturing procedures are complicated and the processing time is lengthy, which is not suitable for mass production
Method used
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[0030] The present invention is a composite bipolar plate of a fuel cell, please refer to Figure 1 to Figure 3 As shown, a bipolar plate unit 10 is included. The bipolar plate unit 10 has a first surface 101 and a second surface 102. The bipolar plate unit 10 includes:
[0031] A conductive plastic plate portion 20 is at least provided with a first plastic surface 201 and a second plastic surface 202, the first plastic surface 201 is located on the first surface 101 of the bipolar plate 10; on the conductive plastic plate portion 20 have at least:
[0032] a plastic fluid inlet 21;
[0033] A plastic fluid outlet 22;
[0034] The flow channel 23 is recessed on the first plastic surface 201 of the conductive plastic plate part 20;
[0035] A metal plate portion 30 is at least provided with a first metal surface 301 and a second metal surface 302, the first metal surface 301 is located on the second surface 102 of the bipolar plate unit 10; the second metal surface 302 combi...
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A composite bipolar plate for fuel cells comprises a bipolar plate unit which comprises a first face and a second face, wherein, the bipolar plate unit comprises a conductive plastic plate part which is provided with at least a second plastic face and a first plastic face which is positioned on the first face of the bipolar plate; the conductive plastic plate part is provided with at least a plastic fluid inlet, a plastic fluid outlet and a flow channel which is concavely arranged on the first plastic face on the conductive plastic plate part; a metal plate part is provided with at least a second metal face and a first metal face which is arranged on the second face of the bipolar plate unit, the second metal face is combined with the second plastic face. So the bipolar plate unit is in the structure of no pores, has high conductive degree, high intensity and corrosion resistance. The invention can greatly reduce the manufacturing cost, has very good corrosion resistance and can ensure mass production of complex microstructure products.
Description
technical field [0001] The composite bipolar plate of the fuel cell of the present invention Background technique [0002] The existing carbon-carbon bipolar plate can make the fuel cell exert excellent power generation efficiency, and the bipolar plate is made of metal. There are rolling, casting, precision casting, injection, powder metallurgy, etc. In addition, the bipolar plate is plastic The manufacturing process includes injection molding, hot extrusion, etc., regardless of the bipolar plate structure, the following disadvantages occur: [0003] 1. The manufacturing cost is extremely high. Existing carbon-carbon composite materials are used in bipolar plates of fuel cells. Although they have excellent power generation efficiency, the manufacturing cost is too high. If the cost of a single bipolar plate is several thousand NT dollars, ten bipolar plates Stacked fuel cells cost tens of thousands of NT dollars, which is disproportionate to the generated electricity, res...
Claims
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IPC IPC(8): H01M4/86H01M8/02H01M8/0297
CPCY02E60/50Y02P70/50
Inventor 李硕仁李其源
Owner YUAN ZE UNIV