Fault diagnosis device and method of fuel cell system

Abstract

The invention relates to a fault diagnosis device and method of a fuel cell system. The fault diagnosis device comprises a communication unit, a diagnosis core unit and a man-machine interaction unit and is characterized in that the communication unit is used for receiving the procedure parameters and working condition information of a main controller as well as the single cell voltage information of a monitor unit and sending diagnosis results and various parameters and data to a field remote control monitoring center and an upper computer; the diagnosis core unit is used for detecting and positioning the faults of the sensor, actuator, controller, monitor unit and galvanic pile of the fuel cell system through the formulated diagnosis strategy; and the main-machine interaction unit is used for displaying, setting, clearing and modifying the diagnosis results and providing maintenance suggestions and measures. By considering the electrochemical reaction mechanism of fuel cells, combining the knowledge and experience of experts and adopting a multisensor information fusion method, the device can be effectively applied to the long-range, short-range, off-line and online fault diagnosis of the fuel cell system, thus the fault diagnosis accuracy and maintainability are improved.

Description

technical field [0001] The invention belongs to a fault diagnosis device and method for a battery system, in particular to a fault diagnosis device and method for a fuel cell system, specifically, a fault diagnosis device and a diagnosis method for a high-power vehicle fuel cell system. Background technique [0002] With the worsening of energy and environmental problems, the development of new energy and alternative energy has become a research hotspot for governments or research institutions around the world. As a fourth-generation power generation technology, fuel cells have been widely used in handheld devices, stationary power stations, and especially in vehicle power systems due to their advantages such as high energy density, cleanliness, and high efficiency. [0003] As the power source of fuel cell vehicles, due to its complex structure, harsh working environment and frequent changes in operating conditions, various faults will inevitably occur in the vehicle fuel c...

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Problems solved by technology

[0003] As the power source of fuel cell vehicles, due to its complex structure, harsh working environment and frequent changes in operating conditions, various faults will inevitably occur in the vehicle fuel cell system. Treatment measures, ranging from causing the system to fail to work normally or efficiently, to causing irreversible permanent damage to the stack or major safety accidents such as hydrogen and electricity

[0004] At present, most of the research on fuel cell systems for vehicles is focused on modeling, simulation and optimal control and improving its dynamic response characteristics, while the fault diagnosis research on its reliability and safety has just started, and in the actual research and development process often It is to take shutdown or load reduction operation after the fault is found, and then use the experience and knowledge of technicians or experts to conduct offline detection and check one by one to realize diagnosis. This sometimes has a certain degree of blindness, and the diagnosis result is not clear enough, and sometimes even wastes a lot of time. Time, manpower and material resources, due to the influence of expert knowledge and experience, sometimes misdiagnosis or missed diagnosis

In addition, this conventional fault diagnosis method based on the experience and knowledge of technicians or experts does not make the expert knowledge and experience well inherited and preserved

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