Fuel cell hydrogen circulation control system and method
A cycle control and fuel cell technology, applied in fuel cells, electrical components, circuits, etc., can solve problems such as lack of gas, affect the uniform distribution of hydrogen, affect the reliability and life of fuel cell stacks, and achieve the effect of ensuring accuracy
Active Publication Date: 2019-03-26
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 following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the 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 hydrogen outlet is connected to the an...
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The invention provides a fuel cell hydrogen circulation control system and method. The system comprises a hydrogen tank, a fuel cell stack, a gas-water separator, a hydrogen circulating pump, a hydrogen circulating pump controller, hydrogen concentration detection equipment and a treatment device. The method comprises the following steps: detecting a hydrogen concentration etain at an anode inletand a hydrogen concentration etaout at an anode outlet of the fuel cell stack by the hydrogen concentration detection equipment, and transmitting the detected etain and etaout to the treatment device;calculating to obtain a corresponding hydrogen excess factor lambda under the rotation speed N of the hydrogen circulating pump by the treatment device according to the etain and etaout so as to obtain a corresponding relationship of N-lambda, and determining a corresponding relationship of I-N according to a preset corresponding relationship of I-lambda; and determining a target rotation speed N-set of the hydrogen circulating pump under target current I-set according to the determined corresponding relationship of I-N, and controlling the hydrogen circulating pump to operate under the N-setby the hydrogen circulating pump controller. According to the fuel cell hydrogen circulation control system and method disclosed by the invention, the rotation speed needed by the hydrogen circulating pump in each current can be accurately set and controlled.
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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Login to View More 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