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A kind of manufacturing process of impregnated graphite bipolar plate

A manufacturing process and impregnated graphite technology, which is applied in the field of bipolar plate processing and production, can solve the problems of reduced thickness of graphite plate, influence on battery performance, difficulty in graphite processing, etc., achieve small contact resistance, good mechanical properties, and reduce production rate Effect

Active Publication Date: 2018-05-01
江苏神州碳制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Graphite plate has good electrical conductivity, thermal conductivity and corrosion resistance, but the brittleness of graphite makes processing difficult, so the processing cost is high, and it also limits the reduction of graphite plate thickness
In addition, graphite is prone to produce pores during the manufacturing process, making fuel and oxidant interpenetrate, affecting battery performance

Method used

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  • A kind of manufacturing process of impregnated graphite bipolar plate
  • A kind of manufacturing process of impregnated graphite bipolar plate
  • A kind of manufacturing process of impregnated graphite bipolar plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A manufacturing process of impregnated graphite bipolar plate, through four steps of preparation of resin impregnating solution, preheating, pressurized impregnation process and curing process, completes the manufacturing process of impregnated graphite bipolar plate; the specific steps are as follows:

[0017] (1) Prepare resin impregnation solution: Mix 40% epoxy resin, 35% phenolic resin, 15% diluent and 10% curing agent evenly, stir for 1 hour, then pour it into an iron bucket and seal it for later use. That is, the preparation of the resin impregnation solution is completed, the diluents are dodecyl and tetradecyl glycidyl ether, and the curing agent is bora octacyclic ester group tertiary amine;

[0018] (2) Preheating: Preheat the graphite plate for 2 hours, and the preheating temperature is 50°C;

[0019] (3) Pressure impregnation process: Put the preheated graphite plate into the prepared resin impregnation solution for pressure impregnation, the pressure is 0....

Embodiment 2

[0024] A manufacturing process of impregnated graphite bipolar plate, through four steps of preparation of resin impregnating solution, preheating, pressurized impregnation process and curing process, completes the manufacturing process of impregnated graphite bipolar plate; the specific steps are as follows:

[0025] (5) Prepare resin impregnation solution: Mix 40% epoxy resin, 35% phenolic resin, 15% diluent and 10% curing agent evenly, stir for 1 hour, then pour it into an iron bucket and seal it for later use. That is, the preparation of the resin impregnation solution is completed, the diluents are dodecyl and tetradecyl glycidyl ether, and the curing agent is bora octacyclic ester group tertiary amine;

[0026] (6) Preheating: Preheat the graphite plate for 3 hours, and the preheating temperature is 60°C;

[0027] (7) Pressure impregnation process: Put the preheated graphite plate into the prepared resin impregnation solution for pressure impregnation, the pressure is 0....

Embodiment 3

[0032] A manufacturing process of impregnated graphite bipolar plate, through four steps of preparation of resin impregnating solution, preheating, pressurized impregnation process and curing process, completes the manufacturing process of impregnated graphite bipolar plate; the specific steps are as follows:

[0033] (9) Preparation of resin impregnation solution: Mix 40% epoxy resin, 35% phenolic resin, 15% diluent and 10% curing agent evenly, stir for 1 hour, then pour it into an iron bucket and seal it for later use. That is, the preparation of the resin impregnation solution is completed, the diluents are dodecyl and tetradecyl glycidyl ether, and the curing agent is bora octacyclic ester group tertiary amine;

[0034] (10) Preheating: Preheat the graphite plate for 2.5 hours, and the preheating temperature is 55°C;

[0035] (11) Pressure impregnation process: Put the preheated graphite plate into the prepared resin impregnation solution for pressure impregnation, the pre...

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Abstract

The invention discloses a manufacturing process for an impregnated graphite bipolar plate. The manufacturing process for the impregnated graphite bipolar plate is characterized by comprising four steps of preparing resin impregnation liquid, preheating, performing a pressure impregnation process, and performing a curing process. The manufacturing process has the advantages as follows: the pressure impregnation process is added in the manufacturing process for the impregnated graphite bipolar plate; the impregnated graphite is used to manufacture the bipolar plate, so that the compressive strength and hardness of the bipolar plate are effectively improved, and the generation rate of gas holes is lowered; the contact resistance between the bipolar plate prepared by the invention and the diffusion layer carbon paper of a proton exchange membrane fuel cell is low; the impregnated graphite bipolar plate is high in mechanical property; and the batch production of the bipolar plate can be realized easily.

Description

technical field [0001] The invention belongs to the field of bipolar plate processing and manufacturing, and in particular relates to a manufacturing process of an impregnated graphite bipolar plate. Background technique [0002] A bipolar plate is a core component of a fuel cell, consisting of a plate and a flow field. The flow field includes a gas inlet, a gas reaction zone, and a gas outlet. Because in the electric stack, the battery cells adjacent to each other need to share the electrode plate as the anode and cathode of the two adjacent battery cells, so the electrode plate is usually called a bipolar plate. [0003] Graphite is an earlier material developed and used to make bipolar plates. Traditional bipolar plates mainly use non-porous graphite plates or carbon plates. The preparation method is mainly to use graphite powder or coke plus a binder, kneading, molding, carbonization, and graphitization to form a thin plate, and then obtain a gas flow channel through m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/10H01M8/02H01M8/0202H01M8/0234
CPCH01M8/02H01M8/0202H01M8/10Y02E60/50Y02P70/50
Inventor 林豪克
Owner 江苏神州碳制品有限公司