Single-cell assembly and test tool of fuel cell

Abstract

The invention relates to a single-cell assembly and test tool of a fuel cell, which comprises a base plate, a pressure applying device, a pressure measuring device and a single-cell test part, wherein the pressure applying device comprises a screw rod for adjusting pressure, a fixed nut, a pressure adjusting nut, a screw rod fixing device and a pressure distributing device; the screw rod fixing device is a clamp fixed on the base plate; the screw rod is fixed at a U-shaped handle of the clamp of the screw rod fixing device by the fixed nut; the lower end of the screw rod is in contact with the pressure distributing device; the lower surface of the pressure distributing device is in contact with an electrode test part; the pressure measuring device comprises a pressure sensor and a digital pressure gauge which are connected by a signal line; and the single-cell test part is positioned between the pressure distributing device and the pressure sensor. The invention has the characteristics of simple structure, complete function, convenient mass use, simple and convenient assembly and disassembly, high efficiency, no supply of compressed gas or hydraulic device, easy manufacture and low cost and facilitates mass use.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to single cell assembly and testing tooling. Background technique [0002] During the production process of membrane electrodes and bipolar plate components of proton exchange membrane fuel cells, electrode performance inspection is required. At present, single cells (generally no more than tens of square centimeters) are used for preliminary evaluation of electrode performance. performance, but also effectively save costs. However, in the current single-cell test, the assembly of the battery is generally fixed by screws, the assembly efficiency is low, and the force of each assembly is difficult to keep consistent, and the force between the screws is not uniform, resulting in uneven force on the battery. There are performance differences caused by assembly, which cannot reflect the real performance differences of the electrodes, which limits the industrial production of fuel cells. [0...

AI Technical Summary

Problems solved by technology

However, in the current single-cell test, the assembly of the battery is generally fixed by screws, the assembly efficiency is low, and the force of each assembly is difficult to keep consistent, and the force between the screws is not uniform, resulting in uneven force on the battery. There are performance differences caused by assembly, which cannot reflect the real performance differences of electrodes, which limits the industrial production of fuel cells

[0003] Chinese Patent Application No. 200720201319.6 discloses a cylinder-type miniature press for rapid testing of a single electrode of a proton exchange membrane fuel cell. Compressed gas is used to push the cylinder to ensure uniform force and constant pressure on the single electrode, which can realize rapid evaluation of the single cell. The operation of the device requires a compressed gas supply, and requires a high gas pressure. When the battery is directly evaluated on the device, under heating, it will cause gas expansion, which will affect the pressure accuracy, and has higher requirements for the use conditions.

Chinese patent application number 200810228041.0 discloses a pressure and displacement measurement and control device for proton exchange membrane fuel cell packaging. By applying pressure manually or electrically, with the pressure and displacement measurement device, the packaging can be adjusted under the condition of detecting battery performance parameters. Pressure and displacement, realize in-situ packaging, but the complex structure of the system, large volume and weight, resulting in inconvenient movement, high cost, difficult to meet the testing needs of batch single cells, and due to the complex structure, it is difficult to miniaturize the design

However, this device is bulky and heavy, and cannot be applied to single-cell testing, that is, miniaturization, and still requires a high-pressure compressed gas supply or a booster pump, which is inconvenient to use and cannot be used for visual measurement

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