A fuel cell hydrogen cycle control system and method
A cycle control, fuel cell technology, applied in fuel cells, electrical components, circuits, etc., can solve problems such as gas shortage, affecting the reliability and life of fuel cell stacks, and reducing hydrogen utilization.
Active Publication Date: 2021-08-24
SHANGHAI HYDROGEN PROPULSION TECH CO LTD
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Problems solved by technology
However, if the flow of multi-component mixed gas including hydrogen, nitrogen and water vapor is used as the flow of hydrogen in the hydrogen circulation path, it will inevitably cause a problem that the excess coefficient of hydrogen is quite different from the actual one.
Among them, when the hydrogen excess coefficient is large, the utilization rate of hydrogen will be reduced, thereby affecting the efficiency of the fuel cell system; when the hydrogen excess coefficient is low, it will affect the uniform distribution of hydrogen in the anode flow field, and even lead to anode failure in severe cases. Undergassing occurs in local areas of the flow field, which affects the reliability and life of the fuel cell stack
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[0055] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0056] see figure 1 , which shows a schematic structural view of a fuel cell hydrogen circulation control system provided in the present application, including: a hydrogen tank 100, a fuel cell stack 200, a gas-water separator 300, a hydrogen circulation pump 400, a hydrogen circulation pump controller 500, A hydrogen concentration detection device 600, and a processor 700. in,
[0057] The hydrogen tank 100 is used to store hydrogen, and its hydr...
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The present application provides a fuel cell hydrogen circulation control system and method, including: a hydrogen tank, a fuel cell stack, a gas-water separator, a hydrogen circulation pump, a hydrogen circulation pump controller, a hydrogen concentration detection device and a processor. Wherein the hydrogen concentration detecting device detects the hydrogen concentration η at the anode inlet of the fuel cell stack in and the hydrogen concentration η at the anode outlet out , and the detected η in and η out sent to the processor; the processor according to η in and η out , calculate the corresponding hydrogen excess coefficient λ at the speed N of the hydrogen circulation pump, so as to obtain the corresponding relationship of N-λ, and determine the corresponding relationship of I-N according to the preset corresponding relationship of I-λ; and, according to Determine the corresponding relationship of I-N, determine the target speed N-set of the hydrogen circulation pump under the target current I-set, and control the hydrogen circulation pump to work under N-set by the hydrogen circulation pump controller. The application can accurately set and control the required rotation speed of the hydrogen circulation pump under each current.
Description
technical field [0001] The present application relates to the technical field of fuel cells, in particular to a fuel cell hydrogen cycle control system and method. Background technique [0002] A proton exchange membrane fuel cell (hereinafter referred to as a fuel cell) uses hydrogen and air as the anode and cathode reaction gases to generate electricity through electrochemical reactions. In order to improve the utilization rate of hydrogen, the fuel cell system usually uses a hydrogen circulation pump to recycle the hydrogen at the outlet of the fuel cell stack. [0003] Specifically, in the actual application process, the fuel cell will generate liquid water at the cathode during the electrochemical reaction, and the liquid water will diffuse from the cathode to the anode through the proton exchange membrane; and the nitrogen in the cathode air that does not participate in the reaction will also pass through the proton exchange membrane from The cathode diffuses to the a...
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IPC IPC(8): H01M8/04089H01M8/04119H01M8/0444
CPCH01M8/04089H01M8/04097H01M8/04156H01M8/04447Y02E60/50
Inventor 余意陈骏程伟陈雪松
Owner SHANGHAI HYDROGEN PROPULSION TECH CO LTD