Manufacturing process and device of bipolar plate for fuel cell

A fuel cell and manufacturing process technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve problems such as dry mixing process and unknown parameters, and achieve the effect of reducing processing costs and improving performance

Inactive Publication Date: 2011-10-05
TONGJI UNIV +2
View PDF7 Cites 31 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent [T.Yoshitaka.JP2002160217(A)] mentions the dry mixing me

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Manufacturing process and device of bipolar plate for fuel cell
  • Manufacturing process and device of bipolar plate for fuel cell
  • Manufacturing process and device of bipolar plate for fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0039] A preparation method of expanded graphite / resin composite bipolar plate for fuel cell, the specific steps are as follows:

[0040] (1) Dry-mix the newly prepared expanded graphite with a vermicular structure and resin powder. Such as figure 1 As shown, the expanded graphite and resin powder are evenly scattered on the conveyor belt 3 through the first vibrating feeder 1 and the second vibrating feeder 2, and the first vibrating feeder 1 and the second vibrating feeder 2 are adjusted by To adjust the ratio of expanded graphite to resin such as the feeding speed and the walking speed of the conveyor belt 3 to make the resin content account for 10-50wt%; at the same time, control the total amount of material spilled on the conveyor belt 3 to 0.1g / sec~10g / sec; In order to make the final bipolar plate reach a certain thickness, the second group, third group and at most groups of series-connected vibrating feeders can be used to further increase the total amount of scattered ma...

Example Embodiment

[0054] Example

[0055] Put the expanded graphite with an expansion ratio of 280 times and the phenolic resin powder with a particle size of 30 to 40 μm separately figure 1 As shown in the first vibrating feeder 1 and the second vibrating feeder 2, by adjusting the excitation force and the size of the discharge port and other parameters, the expanded graphite and phenolic resin are 7:3, that is, the resin content is The ratio of 30wt% is evenly scattered on the conveyor belt 3, and the walking speed of the conveyor belt 3 is adjusted to 5 cm / sec. At the same time, the second and third groups of vibrating feeder units were added to further increase the total amount of spilled materials, so that the height of the expanded graphite / resin finally deposited on the conveyor belt 3 reached about 1 cm. The conveyor belt 3 sends the material to the roller press 4, and after rolling, a pre-press plate with a thickness of 5mm is obtained, and the density of the pre-press plate is 0.4g / cm 3 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Thicknessaaaaaaaaaa
Densityaaaaaaaaaa
Login to view more

Abstract

A manufacturing process and a device of a bipolar plate for fuel cells. The process comprises the following steps: dry-mixing expanded graphite and resin powder; pressing the mixed materials of expanded graphite and resin powder into a precompressed plate; pressing again to obtain corresponding flow passages on one side or two sides; separating the precompressed plate with pressed flow passages of the bipolar plate to obtain a molded bipolar plate; curing and cooling the molded bipolar plate to obtain the bipolar plate product. The device comprises at least one group of vibrating feeders which are used to feed the expanded graphite and resin powder on a conveyer belt respectively; a conveyer belt for conveying the mixed expanded graphite and resin powder; a roller press for pressing the mixture on the conveyer belt into a precompressed plate; a block press for pressing the precompressed plate again and obtaining corresponding flow passages, and a curing furnace for curing and molding the bipolar plate. The block press comprises a mold for pressing the flow passages of the bipolar plate. The expanded graphite/resin composite bipolar plate of the invention has excellent performance in conductivity, gas-barrier rate, and mechanical strength, and has low price.

Description

technical field [0001] The invention relates to a molded graphite bipolar plate for a proton exchange membrane fuel cell and a manufacturing process thereof. Specifically, the bipolar plate of a fuel cell is manufactured by one-time molding through a reasonable ratio of expanded graphite / resin by molding. Background technique [0002] A proton exchange membrane fuel cell (PEMFC) converts chemical energy in fuel (hydrogen) and air directly and continuously into electrical energy. Its basic principle is to pass fuel (H 2 or methanol, etc.), the oxidant (O 2 or air), and make them electrochemically react under the action of catalysts to generate water and generate electricity. At the same time, in order to immediately remove the heat generated during the electrochemical reaction, it is also necessary to pass a cooling fluid (generally water or air) into the battery to dissipate heat. When the fuel cell is working normally, the internal fuel, oxidant and cooling liquid must b...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01M4/88
CPCY02E60/50
Inventor 杨代军马建新徐麟袁亦琳李平李富国陈安定
Owner TONGJI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap