Device and method for preparing composite bipolar plate for fuel cell

A fuel cell and bipolar plate technology, applied in the field of advanced devices, can solve the problems of immature mass production process, complicated pressing process, and restrictions on wide application, and achieve the effects of mass production, production cost reduction, and low price

Pending Publication Date: 2018-09-28
SHANGHAI SHENLI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is difficult to meet the requirements of high conductivity and high mechanical strength of bipolar plate materials at the same time, and the immaturity of mass production technology limits its wide commercial application. Therefore, it is necessary to develop a low-cost, high-performance and easy-to-use Mass production of graphite/resin composite bipolar plates
[0004] WO0041260 mentions the use of flexible graphite plates to prepare bipolar plates. The bipolar plates are formed by pressing first and then filled with glue. The adhesive is mainly polyviny

Method used

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  • Device and method for preparing composite bipolar plate for fuel cell
  • Device and method for preparing composite bipolar plate for fuel cell

Examples

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Embodiment 1

[0022] Such as figure 1 and figure 2 As shown, a device for preparing composite bipolar plates for fuel cells includes a powder mixer 3, a pre-compression mold 5, an oven 7, a mold, a pressure vessel 11 and a knife mold 13, and the powder raw materials are mixed in the powder mixer 3 , the powder raw materials include expanded graphite 1 and polyimide powder 2 .

[0023] Wherein, the pre-compression mold 5 is a steel mold.

[0024] The mold includes a hydraulic press 8, a mold with runners 9 and a cooling device 10, the hydraulic press 8 is connected to the mold with runners 9, and the cooling device 10 is arranged in the mold with runners 9. After the panel 6 is dried in an oven, it is placed in the mold with runners 9, and the mold with runners 9 is driven by the hydraulic press 8 to form the runners.

[0025] The pressure vessel 11 includes a sealed cavity, and fixing fixtures 12 arranged on both sides of the sealed cavity, plates with flow channels molded in multiple m...

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Abstract

The invention relates to a device and a method for preparing a composite bipolar plate for a fuel cell. The device comprises a powder mixing machine (3), a pre-pressing mold (5), an oven (7), a mold (9), a pressure vessel (11) and a cutting mold (13). Powder materials are mixed in the powder mixing machine (3) and then are input into the pre-pressing mold (5) to be pre-pressed into a light panel (6); and then the panel is placed into the oven (7) to be dried and then is placed into the mold to be molded into a board with a flow path; and after being shaped by the pressure vessel (11), the board is cut by the cutting mold (13) into a bipolar plate (14) with the flow path. Compared with the prior art, the process of the invention is simple and easy to implement. The obtained product has excellent electrical conductivity, bending strength and the like and is corrosion resistant, and prices of raw materials are low.

Description

technical field [0001] The invention relates to a device and method for preparing battery bipolar plates, in particular to a device and method for preparing composite bipolar plates for fuel cells. Background technique [0002] As a key component of the PEMFC cell stack, the bipolar plate accounts for about 70% to 80% of the total mass of the entire PEMFC, and its cost accounts for about 40% to 60% of the total cost. Heavy weight and high manufacturing cost are the main bottlenecks for the commercialization of PEMFCs. Therefore, it is necessary to select a suitable bipolar plate material and a reasonable bipolar plate preparation process to reduce the overall quality and cost of PEMFC. [0003] At present, there are three types of bipolar plates commonly used in PEMFC: metal plates, pure graphite and composite plates. Metal bipolar plates not only have high strength and good toughness, but also have good electrical and thermal conductivity, high density, and are easy to ma...

Claims

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Application Information

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IPC IPC(8): H01M4/88B26F1/44B29C43/02B29C43/58
CPCH01M4/8875B26F1/44B29C43/02B29C43/58B29C2043/5808Y02E60/50
Inventor 赵利平
Owner SHANGHAI SHENLI TECH CO LTD
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