Proton exchange membrane fuel cell stack
A fuel cell stack, proton exchange membrane technology, applied in fuel cells, fuel cell groups, battery pack components, etc., can solve the problems of current collector plate corrosion, increased current collector plate resistance, and reduced fuel cell life. Avoid chemical corrosion, extend service life, and ensure effective collection results
Inactive Publication Date: 2014-07-16
NANJING UNIV
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Problems solved by technology
When the reaction gas with a certain humidity and temperature passes through the collector plate, it is easy to cause corrosion of the collector plate in the working environment of the fuel cell
Therefore, the material selection of the current collector plate is limited, it must be a corrosion-resistant, high-conductivity material, such as copper, silver, gold or stainless steel plated with copper, silver, gold, even so, it cannot completely prevent the current collector plate Corrosion, after the fuel cell has been in operation for a period of time, the resistance of the collector plate will still increase
This not only increases the cost of the fuel cell stack, but also reduces the life of the fuel cell
Method used
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[0025] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0026] figure 1 It is a schematic diagram of the structure of an ordinary proton membrane fuel cell stack. The stack is composed of single cells 1 (three) stacked in series to form a battery pack. The field plate 4 is composed of a current collector plate 5, an insulating plate 6 and an end plate 7 respectively arranged at both ends of the battery pack, and a gas channel (8a-hydrogen input channel; 8b-hydrogen output channel; 9a - air output channel; 9b - air input channel). The flow field plates (hydrogen flow field plate 3, air flow field plate 4) are mainly sintered graphite plates or molded graphite plates, one side of the flow field plate is a gas flow channel...
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The invention discloses a proton exchange membrane fuel cell stack. The proton exchange membrane fuel cell stack comprises a cell set which is formed by overlaying a plurality of single cells in series, and collector plates, an insulating plate and an end plate which are arranged at two ends of the cell set in turn, wherein a gas channel is formed in the stack; spacer layers which are protruding structure layers of the insulating plate are arranged between the collector plates and the gas channel; conductive transition plates are arranged between the cell set and two collector plates; and reaction gas channels are formed in the middles of the transition plates and are communicated with the gas channel. By arranging the spacer layers and the transition plates, the chemical corrosion of the collector plates is avoided, and the effective acquisition of the current of the fuel cell is ensured, so that the cost of the fuel cell is reduced, and the service life of the fuel cell is prolonged.
Description
technical field [0001] The invention relates to the technical field of fuel cells, in particular to a proton exchange membrane fuel cell stack. Background technique [0002] Fuel cell technology is a clean and renewable energy conversion technology that utilizes the electricity, heat and water generated by the electrochemical reaction of hydrogen and oxygen. Fuel cells can be divided into alkaline fuel cells, phosphoric acid fuel cells, molten carbonate fuel cells, solid oxide fuel cells, proton exchange membrane fuel cells, etc. according to different electrolytes. Due to its high power density, low operating temperature, simple battery structure, and insensitivity to pressure changes, proton exchange membrane fuel cells have attracted widespread attention worldwide, and their products have gradually entered the market. [0003] The electrolyte of the proton exchange membrane fuel cell is a proton exchange membrane, and the Nafion series perfluorosulfonic acid membrane pro...
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IPC IPC(8): H01M8/24H01M2/14H01M2/08H01M2/32H01M8/2404H01M50/571
CPCY02E60/50
Inventor 顾军于涛刘建国邹志刚
Owner NANJING UNIV