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Bipolar plate used for hydrogen fuel battery pack and manufacturing process therefor

A fuel cell stack and manufacturing process technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of bipolar plates produced by injection molding process, high viscosity characteristics, that is, poor fluidity, and long production molding cycle. Achieve the effects of low cost, short production cycle and fast production rate

Inactive Publication Date: 2016-06-01
CHANGZHOU BONENG NEW ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above solution, because the raw materials contain carbon fibers, the problem is that after the raw materials are heated to a molten state, the raw materials have high viscosity characteristics, that is, poor fluidity, which makes it impossible to use the injection molding process to produce bipolar plates, and can only be molded. production process, because the entire production and molding cycle of the compression molding process is long, and the production efficiency is low, it is difficult to achieve continuous production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: A bipolar plate for a hydrogen fuel cell stack consists of the following components in parts by weight: phenolic resin: 45 parts; carbon powder: 50 parts; mold release agent: 5 parts.

[0024] The production process is as follows: (1): use a twin-screw extruder to mix 4.5kg of powdered phenolic resin, 5kg of carbon powder and 0.5kg of release agent and process them into granular raw materials to be processed; (2): mix ( 1) Heat the raw material to be processed to 320°C, and the raw material to be processed is in a molten state; (3): The raw material to be processed in a molten state prepared in (2) is injected into the product mold through an injection machine, and after cooling The mold is opened, and finally the carbon-based composite material bipolar plate is made.

[0025] Among them, the injection rate of the injection machine is 58mm / s, the holding pressure of the injection machine is 145Mpa, the temperature of the product mold is 200°C, and the gate...

Embodiment 2

[0027] Embodiment 2: A bipolar plate for a hydrogen fuel cell stack consists of the following components in parts by weight: phenolic resin: 35 parts; carbon powder: 58 parts; mold release agent: 7 parts.

[0028] The production process is as follows: (1): 3.5kg of powdered phenolic resin, 5.8kg of carbon powder and 0.7kg of release agent are mixed by twin-screw extruder and processed into granular raw materials to be processed; (2): The raw material to be processed prepared in (1) is heated to 335°C, and the raw material to be processed is in a molten state; (3): The raw material to be processed in a molten state prepared in (2) is injected into the product mold through an injection machine, and cooled Afterwards, the mold is opened, and the carbon-based composite material bipolar plate is finally obtained.

[0029] Among them, the injection rate of the injection machine is 55mm / s, the holding pressure of the injection machine is 140Mpa, the temperature of the product mold is...

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Abstract

The invention discloses a bipolar plate used for a hydrogen fuel battery pack and a manufacturing process therefor. According to the main scheme, the bipolar plate used for the hydrogen fuel battery pack comprises the following ingredients in parts by weight: 5-50 parts of phenolic resin, 30-60 parts of carbon powder and 2-10 parts of releasing agent. Compared with the prior art, a carbon fiber material is not added to the carbon-based composite material bipolar plate, so that the continuous production of the bipolar plate can be realized by adopting an injection molding process; and meanwhile, the injection molding process has the advantages of short manufacturing period, low operation difficulty, low cost and high production speed, so that the bipolar plate is quite suitable for popularization and application.

Description

technical field [0001] The invention relates to a bipolar plate used for a hydrogen fuel cell group and a manufacturing process thereof. Background technique [0002] Methanol fuel cells use methanol directly as a raw material. As a proton exchange membrane fuel cell, a conductive separator is required to support, collect current, separate oxidants and reductants, and guide the flow of oxidants and reductants on the electrode surface of the battery. , this conductive separator is called a bipolar plate. The structure of the flow field of the bipolar plate is complex, the processing is difficult, and the requirements on the performance of the material are high. The performance of the material is low, which will lead to the problem of unstable working performance and low efficiency of the fuel cell. [0003] The current research on bipolar plates has included three categories: metal plates, pure graphite plates and composite material plates. Among them, the metal plate has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88
CPCH01M4/86H01M4/88Y02E60/50
Inventor 沈建跃陈刚
Owner CHANGZHOU BONENG NEW ENERGY CO LTD
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