State monitoring method and system for water-cooled proton exchange membrane fuel cell

Abstract

The invention discloses a state monitoring method for a proton exchange membrane fuel cell. The state monitoring method comprises the following steps: introducing the optimal size of a V-I characteristic curve slope k as a control index for a stable working state of the fuel cell; and generating a control signal according to information of measured k, and controlling operating conditions of the fuel cell, thereby adjusting the fuel cell to work on an ohm segment. The invention further discloses a state monitoring system for the fuel cell. The state monitoring system comprises a fuel cell stack (the optimal working temperature is 60 DEG C), a hydrogen supply pipeline system, an air supply pipeline system, a cooling water circulation system, an exhaust discharge system, an impedance testing system, a safety monitoring system and a detection control system. The V-I characteristic curve slope k of the fuel cell is obtained through the detection control system; with k as the control index, the fuel cell quickly restores to the ohm segment; the possibility of water logging and membrane dryness of a proton exchange membrane is lowered; and the performance of the fuel cell is greatly improved.

Description

Technical field: [0001] The invention relates to a state monitoring method and system for a water-cooled proton exchange membrane fuel cell. Background technique: [0002] Energy is the lifeblood of societies and economies. In recent years, with the rapid development of the world economy, energy consumption has been increasing, traditional energy resources have been decreasing, and energy prices have continued to hit record highs. At the same time, the rapid economic development has also brought serious environmental problems, and the use of clean energy and renewable energy has become an inevitable trend in the world's energy development. The advantages of good operating performance and environment-friendly power generation of fuel cells make it a clean energy with the most development prospects. As a kind of fuel cell, proton exchange membrane fuel cell (Proton Exchange Membrane Fuel Cell, PEMFC) has the advantages of low operating temperature, high power density, fast r...

AI Technical Summary

Problems solved by technology

"Water flooding" and "membrane dryness" are prominent problems affecting the working performance and reliability of the proton exchange membrane fuel cell system. The fuel cell works in the activation section I for a long time, and it is easy to lose water and cause the anode "membrane dryness"

The fuel cell works in the concentration zone III for a long time, which can easily cause the cathode to "flood"

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