Method and system for detecting fuel cell three-way valve
A fuel cell and three-way valve technology, applied in the detection field, can solve the problems of hydrogen fuel cell cold start performance, power degradation, failure to deal with three-way valve sticking problems in time, excessive temperature difference, etc.
Active Publication Date: 2019-09-06
WEICHAI POWER CO LTD
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[0003] However, in the prior art, since the electric three-way valve is not detected in real time, when the electric three-way valve is stuck, it is impossible to know that the three-way valve is stuck at the first time, resulting in the temperature and The temperature difference between the coolant out of the stack and into the stack is too large, and the coolant temperature of the hydrogen fuel cell engine is strongly related to the chemical reaction rate. Therefore, when the electric three-way valve is stuck, there is no real-time monitoring of the three-way valve. , failing to deal with the sticking problem of the three-way valve in time will lead to a serious decline in the cold start performance of the hydrogen fuel cell and the power during normal operation
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[0069] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0070] In this application, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes none. other elements specifically listed, or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "com...
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The present invention discloses a method and a system for detecting a fuel cell three-way valve by obtaining a current working state of a hydrogen fuel cell engine. When the fuel cell engine is in a cold start state, a first temperature value of an in-stack coolant first temperature value and an initial temperature value is less than a first preset temperature value, it is determined that the three-way valve is stuck. When the fuel cell engine is in a normal power generation state, if a current second temperature value of the in-stack coolant is greater than a second preset temperature value,and a cooling fan speed is greater than a preset speed, it is determined, at a second preset time point, whether a third temperature value of the in-stack coolant is greater than a third preset temperature value. If the third temperature value is greater than the third preset temperature value, it is determined that the three-way valve is stuck. In the detection method of the fuel cell three-way valve disclosed above, the temperature of the in-stack coolant is obtained in real time, and the temperature is used to determine whether the three-way valve is stuck, so that an objective of detectingthe three-way valve is achieved.
Description
technical field [0001] The invention relates to the technical field of detection, in particular to a detection method and system for a fuel cell three-way valve. Background technique [0002] A hydrogen fuel cell is a chemical device that directly converts the chemical energy of fuel into electrical energy, also known as an electrochemical generator. Hydrogen fuel cell is the fourth power generation technology after hydropower, thermal power and atomic power. Since the hydrogen fuel cell converts the Gibbs free energy in the chemical energy of the fuel into electrical energy through an electrochemical reaction, it is not limited by the Carnot cycle effect, so the efficiency is high; in addition, the hydrogen fuel cell uses hydrogen fuel and oxygen as raw materials, and emit very little harmful gas. However, the coolant temperature of a hydrogen fuel cell engine is strongly related to the chemical reaction rate, which directly affects the cold start performance of the vehic...
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Login to View More IPC IPC(8): H01M8/0432H01M8/04664G01M13/003
CPCG01M13/003H01M8/04358H01M8/04679Y02E60/50
Inventor 闫立冰张娟任宪丰李苑玮
Owner WEICHAI POWER CO LTD