Collector plate of fuel cell as well as preparation method thereof

Abstract

The invention discloses a collector plate of a fuel cell. The collector plate of the fuel cell comprises a substrate plate, wherein the substrate plate is a nonmetallic substrate plate; one lateral surface of the substrate plate is coated with a coating layer, and the other lateral surface of the substrate plate is provided with a metal foil layer; the surface of the metal foil layer is coated with a gold coated layer. The collector plate of the fuel cell, which is provided by the invention, has the functions of electric conduction, insulation, sealing, shock absorption, back pressure, heat radiation and the like, and has a wide market prospect.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a collector plate of a fuel cell and a preparation method thereof. Background technique [0002] As a new type of energy conversion device, fuel cell has been recognized by more and more people for its high efficiency, environmental protection, compactness and many other advantages. The most basic structure of a fuel cell is a single cell, which is mainly composed of a membrane electrode assembly sandwiched between two bipolar plates, a collector plate and an end plate. Single cells connected in series form a fuel cell. Among them, the function of the collector plate is particularly important. The collector plate not only requires good electrical conductivity, but also requires good electrochemical corrosion resistance. [0003] However, most of the current collector plates of fuel cells are produced by plating gold on the metal plate. In order to enhance the mechanical strength of th...

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Problems solved by technology

[0003] However, most of the current collector plates of fuel cells are produced by plating gold on the metal plate. In order to enhance the mechanical strength of the collector plate, the metal plate usually needs a certain thickness, basically the thickness is mostly 2-4mm Between, because the metal plate is too thick, the weight of the entire stack will increase; in addition, because one side of the metal plate is gold-plated, and the other side is not treated, it is relatively smooth, which is not convenient for the sealing of the entire stack. In order to achieve the sealing effect of the stack, It is also necessary to add other sealing materials, which brings a lot of trouble to the assembly of the stack, and is not convenient for the rapid assembly and automatic production of the stack; moreover, in order to achieve a good sealing effect of the stack, sacrifice the collection The heat dissipation function of the electric board, when the electric stack is discharged with a large current, it is difficult to control and stabilize the local temperature of the electric stack

[0004] Among the existing domestic patents, the patent titled "collector plate for fuel cell" (application number: 200420120509.1) introduces a collector plate based on a printed circuit board. The surface is coated with a conductive metal material and a current collector line made of metal foil, but the patent does not propose the material and thickness of the base material layer, the material selection and thickness of the metal material, and the specific material selection thickness of the metal foil layer. Proposed improvement, there is no coating layer on the back of the substrate, so it does not have the functions of shock resistance and back pressure, and it is extremely inconvenient to install and disassemble

[0005] Another existing patent (Patent No.: 200510036580.0) titled "Collector Plate and Its Manufacturing Method" introduces a current collector plate including a collector base, a nickel layer plated on the surface of the collector base, and a nickel layer plated on the The gold layer on the surface of the nickel layer, but the thickness of the nickel layer and the gold layer is thick, which is not conducive to heat dissipation, and the collector base is made of metal material, which is heavy in weight and large in size, which is not easy to process

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