A temperature-adjustable bipolar plate assembly for methanol fuel cells

Abstract

The invention provides a temperature-adjustable bipolar plate assembly for methanol fuel cells, which relates to the technical field of methanol fuel cells, and includes a bipolar plate body and a heat regulation assembly. The two ends communicate with the outside through the opening and the opening is provided with an internal thread. The connecting piece includes a connecting rod. One end of the connecting rod is provided with an external thread matching the internal thread, and the other end is fixedly connected with the heat conducting sheet. The heat conducting sheet is provided with a fastening sheet on the side away from the connecting rod, and the fastening sheet is set up and down and has a threaded hole on it, and a bolt matched with it is provided in the threaded hole, and the heat adjustment assembly includes two The horizontal tube, two vertical tubes and four connecting tubes, the invention can effectively control the temperature of the bipolar plate in the methanol fuel cell, not only can ensure the normal and efficient operation of the stack, but also can improve the working efficiency and generate more electric energy.

Description

technical field [0001] The invention relates to the technical field of methanol fuel cells, in particular to a temperature-adjustable bipolar plate assembly for methanol fuel cells. Background technique [0002] Direct Methanol Fuel Cell belongs to the category of Proton Exchange Membrane Fuel Cell (PEMFC), which directly uses methanol aqueous solution or steam methanol as the fuel supply source, without the need to produce hydrogen through the reforming of methanol, gasoline and natural gas for power generation. Compared with the proton exchange membrane fuel cell (PEMFC), the direct methanol fuel cell (DMFC) has the characteristics of low-temperature rapid start-up, clean and environmentally friendly fuel, and simple battery structure. This makes Direct Methanol Fuel Cell (DMFC) likely to become the mainstream of future portable electronics applications. [0003] It uses methanol directly without pre-reforming. Methanol is converted into carbon dioxide, protons and electr...

AI Technical Summary

Problems solved by technology

On the cathode side of the battery, the evenly distributed air or oxygen diffuses into the cathode catalyst layer after the flow field structure of the cathode collector plate, and is electrochemically reduced by the protons from the anode, and the generated water vapor or liquid water leaves together with the reaction tail gas The cathode flow field of the battery. The expected operating temperature of this battery is below 120°C, generally 70-80°C, which is slightly higher than that of the standard proton exchange membrane fuel cell. The current methanol fuel cell has a higher temperature in a short time after methanol and air enter If the temperature is too low, the efficiency of the battery is not high, and if the temperature is too low, the water generated by the reaction will also condense, block the gas channel, and the performance of the stack will deteriorate. However, if the temperature is too high, the membrane electrode will lack water, and the proton exchange membrane will not be able to Normal work or even damage, so generally when working, it is necessary to adjust the temperature of the stack to ensure the normal and efficient operation of the stack

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