Fuel cell internal temperature and humidity online measurement system

Abstract

The invention relates to a fuel cell internal temperature and humidity online measurement system. The system comprises a signal transceiving module connected with a fuel cell, a DC power supply connected with the signal transceiving module, a signal conversion record module, and a sensor module for detecting the temperature and humidity information of the internal cathode and anode reaction gas ofthe fuel cell. Compared with the prior art, the fuel cell internal temperature and humidity parameter can be online detected, the fuel cell internal moisture content is analyzed in real time. In theactual application, a cell control policy can be adjusted in real time according to a system diagnosis result, and the fuel cell efficiency and life are improved.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, in particular to an on-line measurement system for internal temperature and humidity of a fuel cell. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is a power generation device that directly converts the chemical energy in hydrogen into electrical energy, and its power generation efficiency can reach more than 50%. The only product during the operation of the proton exchange membrane fuel cell is water, which is very friendly to the environment. At the same time, it has the characteristics of fast start-up, low operating temperature, and low noise. It is an ideal power source for future cars and drones. [0003] The product of the proton exchange membrane fuel cell in the power generation process is water. Studies have shown that the content and distribution of water inside the fuel cell directly affect the efficiency, stability and life of the fuel cell. On the one...

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Problems solved by technology

[0005] Existing technologies mostly use the visible light observation method to qualitatively judge the water content state in the reaction gas channel of the fuel cell. However, the visible light observation method needs to set a transparent observation window on the fuel cell to be measured, which has a great impact on the output power of the fuel cell and cannot Quantitative measurement of water vapor content

In addition, there are methods such as neutron imaging, X-ray imaging, and nuclear magnetic resonance imaging to detect the water content inside the fuel cell. The equipment used in this imaging method is complex, the cost is high, and the volume is very large. fuel cell

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