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Device and method for preparing electrically assisted gradient coating on fuel cell plate base material

A fuel cell plate and gradient coating technology, which is applied to fuel cells, devices for coating liquid on the surface, coatings, etc., can solve the problem of the difficulty in ensuring the flatness of the pressed sheet surface, the complete removal of the metal foil, and the coating Problems such as poor surface quality, to achieve the effect of strong bonding, low cost, and adjustable coating thickness

Active Publication Date: 2022-06-24
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: it is difficult to ensure the flatness of the surface of the compacted tablet with mixed powder, and the surface quality of the coating after laser cladding is not good; at the same time, there are many processes and there are certain restrictions on the thickness of the coating, and it is not applicable For the manufacture of gradient coatings
The disadvantage of this method is that it is only suitable for the coating of small plates, the processing efficiency is low, and it is also not suitable for the preparation of gradient coatings.
The disadvantages of this method are: the cost of powder preparation is high, it is difficult to ensure that the metal foil is completely removed, and there are many processes

Method used

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  • Device and method for preparing electrically assisted gradient coating on fuel cell plate base material
  • Device and method for preparing electrically assisted gradient coating on fuel cell plate base material
  • Device and method for preparing electrically assisted gradient coating on fuel cell plate base material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] like figure 1 As shown, a device for preparing an electrically assisted gradient coating for a fuel cell electrode plate substrate includes a conveyor belt 6, a current controller 1, and a plurality of rolling components (the number of rolling components is determined according to the number of gradient coatings, this implementation In the example, four rolling assemblies are used as an example), the rolling assembly includes a base roll 4, a roll sleeve 3 and an adjusting device, the roll sleeve 3 is sleeved on the base roll 4, and the roll sleeve 3 and the base roll 4 The relative movement between the two is limited mainly by interference fit and pin fixing. In this embodiment, it is connected by means of bolts, and in the case of Figure 4-6 As shown, a groove is set on the base roller 4, and a corresponding groove is set on the roller sleeve 3. After the roller sleeve 3 is sleeved on the base roller 4, a plug 10 is inserted into the groove to fix the roller sleeve ...

Embodiment 2

[0056] like Figure 7 As shown, the difference from Embodiment 1 is that the conveyor belt 6 can be replaced with four fixed rollers 12 with the same outer diameter as the roller sleeve. The fixed rollers 12 have only one degree of freedom. The contacts 11 are connected to the metal substrate 5 . The rotation of the fixed roller 12 drives the metal substrate 5 to move horizontally.

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Abstract

The invention relates to a device and method for preparing an electrically assisted gradient coating on a fuel cell plate base material, comprising a conveyor belt, a current controller, and a plurality of rolling assemblies, and the current controller is respectively connected to the conveyor belt and each rolling assembly, The rolling assembly includes a base roller, a roller cover and an adjustment device. The roller cover is set on the base roller, and the composition of the roller cover is the material to be coated; The Joule heat generated in the suite melts the material to be coated, and the material is coated on the surface of the metal substrate through the movement of the conveyor belt. By setting up multiple coating coating stations, the effective preparation of the gradient coating is obtained. Compared with the prior art, the invention has the advantages of smooth coating surface, good mechanical properties, one-time molding, convenient processing and high efficiency.

Description

technical field [0001] The invention belongs to the technical field of surface engineering, and in particular relates to a preparation device for an electric-assisted gradient coating of a fuel cell electrode plate and a preparation method for a corresponding high-performance gradient coating. Background technique [0002] As a new type of energy device, hydrogen fuel cell uses hydrogen as fuel, oxygen as oxidant, and the only product is water, which has the characteristics of high efficiency and cleanliness. It has broad application prospects in the fields of automobiles, electronic products and national defense and military. Among them, the bipolar plate, as one of the important components of the fuel cell, has a significant impact on the output performance of the fuel cell. Bipolar plates mainly use two kinds of substrates, graphite and metal. Among them, metal materials have become the main materials of fuel cell bipolar plates because of their good mechanical propertie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05C1/02B05C1/00B05C13/02B05D7/14B05D3/10H01M8/0228H01M8/0245
CPCB05C1/025B05C1/003B05C13/02B05D7/14B05D3/102H01M8/0228H01M8/0245B05D2202/15B05D2202/35B05D2202/25Y02E60/50
Inventor 徐竹田王铭洪来新民彭林法易培云
Owner SHANGHAI JIAOTONG UNIV
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