Hardware-in-loop multi-channel fuel cell impedance testing system

Abstract

The invention provides a hardware-in-loop multi-channel fuel cell impedance testing system. The system overcomes the defects that a traditional electric-pile electronic testing system can only give general information of an electric pile but cannot obtain the individual information of all single cells constituting the electric pile. The hardware-in-loop multi-channel fuel cell impedance testing system is characterized in that an electric pile composed of fuel cells and a multi-channel current sensor are connected with a multi-channel potential sensor, the detection of the single cells and theanalysis of the synchronous multi-cell impedance can be achieved while the whole current distribution information of the electric pile is obtained, correspondingly the information about electrochemical reactions, mass transfer and internal resistance changes can be obtained, and the demands of the electric pile for multi-directional precise analysis and diagnosis can be met. The system fills the blank in a multidirectional battery durability analysis and diagnosis platform in China, greatly promotes the research on battery service life and performance attenuation mechanisms and rules, improvesthe durability of a power supply system, and eliminates the bottleneck of practicability and industrialization of the power supply system.

Description

technical field [0001] The invention relates to the technical field of battery impedance testing, in particular to a hardware-in-the-loop multi-channel fuel cell impedance testing system. Background technique [0002] Proton Exchange Membrane Fuel Cell (PEMFC) is a power generation device that directly converts the chemical energy of fuel into electrical energy by means of electrochemical reaction without combustion. In theory, as long as the fuel is continuously supplied, the battery will Continuous power generation is possible. At the same time, its production capacity is not limited by the Carnot cycle, the energy conversion efficiency is high (theoretical efficiency reaches 85% to 90%), the environment is friendly (no nitrogen oxide and sulfur oxide emissions, low noise), easy to operate, safe and reliable , which will surely occupy an important position in the future energy system. In recent years, PEMFC technology has become mature internationally, and has made great...

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Problems solved by technology

Unfortunately, the analysis and testing capabilities of the above-mentioned systems are limited, and their working principle is to precisely regulate the battery current / voltage through the electronic load, and to accurately control the working conditions of the battery through devices that control flow, temperature, humidity, and pressure. The acquisition and analysis system gives the current-voltage curve and the overall information of the stack, which cannot realize multi-directional online monitoring of the battery / stack operation process, and it is difficult to achieve an in-depth analysis of the battery performance attenuation mechanism

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