An assembly method of a cylindrical self-breathing fuel cell

Abstract

The invention provides a cylindrical self-breathing fuel cell, comprising an anode current collector, a membrane electrode, a cathode current collector and a tension mechanism, the membrane electrode is wound on the anode current collector, and the cathode current collector is wound On the membrane electrode, the tension mechanism is tensioned and clamped at the seam of the cathode current collector, so that the cathode current collector is wrapped and attached to the membrane electrode. The invention also provides an assembly method of the cylindrical self-breathing fuel cell. The beneficial effects of the invention are: solving the membrane electrode contact and sealing problems of the cylindrical structure fuel cell, making the cell have high reliability, and realizing higher power density compared with the traditional flat fuel cell.

Description

technical field [0001] The invention relates to a fuel cell, in particular to a cylindrical self-breathing fuel cell and an assembly method thereof. Background technique [0002] Fuel cells are a common way to utilize hydrogen energy. They have the advantages of clean products, high power density and high energy conversion rate, and have broad application prospects under the trend of carbon neutrality. For some special application scenarios, the load occupied by fuel cell auxiliary equipment (such as hydrogen circulation pump, reaction gas humidification device, etc.) and the parasitic power consumption generated become unacceptable. Taking drones as an example, self-breathing fuel cells that directly expose the cathode to the atmosphere and abandon auxiliary equipment are commonly used. Thanks to the high energy density of hydrogen, the battery life of fuel cell drones is generally more than three times longer than that of traditional lithium battery drones. Existing fuel...

AI Technical Summary

Problems solved by technology

The contact problem of the current collector is not solved, the contact resistance greatly affects the performance of the battery, and the advantages of the cylindrical structure are not exerted

[0007] The scheme proposed by CN105070932A mainly relies on 3D printing technology and memory alloy technology, which greatly increases the manufacturing time cost and raw material cost of the product

At the same time, due to the memory properties of memory alloys, it is difficult to maintain consistent and suitable contact stress in the temperature range of battery storage and use.

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