Coupling monitoring method and device for fuel cell stack

Abstract

The invention relates to a coupling monitoring method of a fuel cell stack. The coupling monitoring method realizes monitoring of internal states and faults of the fuel cell stack in different application scenarios by coupling voltage patrol and on-line electrochemical diagnosis, the voltage patrol is used for collecting, feeding back and recording the voltage of a single fuel cell in real time, and the on-line electrochemical diagnosis is used for performing on-line electrochemical diagnosis, so the health change of the fuel cell is judged; and the on-line electrochemical diagnosis is used for knowing the internal dynamic process of the fuel cell so as to deeply identify and solve the fault of the fuel cell. Compared with the prior art, the method has the advantages that the internal dynamic process of the fuel cell is known, different operation conditions of the fuel cell are distinguished, irreversible damage to the performance of the fuel cell is avoided, and the like.

Description

technical field [0001] The invention relates to the technical field of fuel cell monitoring, in particular to a coupling monitoring method and device for a fuel cell stack. Background technique [0002] As a non-fossil fuel, clean and renewable energy, hydrogen is expected to play an important role in the future energy transition, and has attracted more and more attention from researchers. The fuel cell using hydrogen as fuel is a power generation device that uses hydrogen and oxygen to generate electricity when the chemical reaction occurs, and the by-products are only water and heat, and has a series of advantages such as high efficiency, low noise, and zero pollution. Fuel cells have been used in scenarios such as automobiles, portable power supplies, and distributed power stations. The fuel cell system includes a fuel cell stack, an external gas supply circuit (cathode and anode hydrogen circuits), a cooling water circuit, and an electrical circuit. Among them, the fue...

AI Technical Summary

Problems solved by technology

[0004] At present, fuel cell stack diagnosis generally includes three basic tasks: fault detection, fault isolation, and fault analysis. The commonly used voltage inspection technology, on the one hand, judges its working status by collecting the voltage of each fuel cell. In the face of the rapid development of battery stacks, technology needs to be improved in terms of performance. On the other hand, this method can only detect faults and preliminary fault analysis, but cannot understand the internal dynamic process and perform in-depth fault identification and explanation

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