A pressure permeation glue injection device for flexible graphite bipolar plates for fuel cells

Abstract

The invention discloses a flexible graphite bipolar plate pressure permeation glue injection device for fuel cells, comprising a glue injection box, a glue holding box and a linear drive assembly, the glue holding box is arranged under the glue injection box, and the glue injection box is provided with The first piston, the outer peripheral surface of the first piston abuts against the inner wall of the glue injection box, the first piston is slidingly connected with the glue injection box, the first piston or the glue injection box is driven by a linear drive assembly, and the bottom of the glue injection box is provided with A plurality of leakage holes run through the bottom wall, the plastic injection box and the first piston form a placement cavity, and a graphite pole plate is placed at the bottom of the placement cavity. This scheme is optimized on the basis of the original vacuum pressurized impregnation glue injection equipment, and adopts the method of pressure penetration glue injection. There is a pressure difference between the two sides of the plate, and the liquid resin flows directionally from one side of the plate to the other, so that the liquid resin is fully Filling the pores inside the graphite plate does not require the process of vacuum extraction, greatly improves the efficiency of glue injection, reduces the operation cycle, and has good practical value.

Description

technical field [0001] The invention relates to the field of fuel cell graphite polar plate glue injection production equipment, in particular to a fuel cell flexible graphite bipolar plate pressure permeation glue injection device. Background technique [0002] A fuel cell is a power generation device that directly converts chemical energy into electrical energy through an electrochemical reaction between hydrogen fuel and an oxidant. Specifically, it can be divided into high-temperature solid oxide fuel cells, alkaline fuel cells, phosphoric acid fuel cells, and molten carbonate fuel cells. batteries and proton exchange membrane fuel cells. With the continuous development of new energy technologies, the proton exchange membrane fuel cell (Proton Exchange Membrane Fuel Cell, PEMFC), which uses hydrogen as the main fuel, has become one of the research hotspots in recent years. Since the energy conversion process does not need to go through a heat engine process, the energy ...

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Problems solved by technology

After the resin is cured, the resin and the flexible graphite are combined into a relatively uniform and dense whole, but because there is no pressure difference between the two sides of the plate, it is unfavorable for the flow of the resin inside the plate material, which not only reduces the efficiency of glue injection, but also some fine pores The glue injection effect is not ideal, especially when the air inside the plate material is not completely discharged, bubbles will be formed inside the plate material, resulting in large glue injection defects, reducing the mechanical strength and airtightness of the graphite bipolar plate. performance

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