Fault identification device and fault identification method for reactor inlet hydrogen pressure sensor
A pressure sensor and fault identification technology, which is applied in the field of fuel cells, can solve problems such as hydrogen system is easy to freeze, it is difficult to identify sensor freezing, and hydrogen purge flow is small
Pending Publication Date: 2022-05-13
FAW JIEFANG AUTOMOTIVE CO
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Problems solved by technology
[0003] In the fuel cell power generation process, the internal reaction generates water molecules, and in cold conditions, the water will cause the fuel cell system to freeze, and the hydrogen system is more likely to freeze due to the small hydrogen purge flow
Traditional sensor diagnosis can only diagnose sensor electrical faults, physical value out-of-limit faults, etc., and it is difficult to identify sensor icing conditions
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[0056] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the application are given in the drawings. However, the present application can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this application more thorough and comprehensive.
[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the application are only for the purpose of describing specific embodiments, and are not intended to limit the application.
[0058] When used herein, the singular forms "a", "an" and "the / the" may also include the plural forms unl...
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The invention relates to a fault identification device and fault identification method for an in-pile hydrogen pressure sensor, and the method comprises the steps: calculating a hydrogen pressure simulation value of the in-pile hydrogen pressure sensor according to a preset algorithm and a hydrogen mass conservation principle when a fuel cell is in a cold start state; and judging whether the reactor inlet hydrogen pressure sensor fails or not according to the hydrogen pressure simulation value and the hydrogen pressure actual value of the reactor inlet hydrogen pressure sensor. In the power generation process of the fuel cell, water molecules are generated through internal reaction, under the cold condition, the water can cause the situation that a fuel cell system is iced, and due to the fact that the hydrogen purging flow is small, a hydrogen system is iced more easily. By adopting the method, whether the in-pile hydrogen pressure sensor breaks down due to freezing caused by cold can be identified in the power generation process of the fuel cell under the cold condition.
Description
technical field [0001] The present application relates to the technical field of fuel cells, in particular to a fault identification device and a fault identification method for a hydrogen pressure sensor in a stack. Background technique [0002] Fuel cell vehicles have the advantages of renewable energy, zero emissions, and high efficiency, and are regarded as an important direction for the future development of the automotive industry. The fuel cell electronic control system is composed of the main components such as the fuel cell system, related actuators and sensors. The vehicle controller sends the required power of the fuel cell to the fuel cell controller through a message, and the fuel cell controller calculates the set current of the fuel cell after considering the power consumption of all accessories; the fuel cell generates electricity through the electrochemical reaction of hydrogen and oxygen Convert the chemical energy in the fuel into electrical energy and ou...
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IPC IPC(8): H01M8/0438H01M8/04664
CPCH01M8/04679H01M8/0438Y02E60/50
Inventor 冯倩张鹏陈首刚
Owner FAW JIEFANG AUTOMOTIVE CO