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A superposition injection control method based on fuel cell anode pressure variable frequency injection

A fuel cell and control method technology, which is applied to fuel cells, circuits, electrical components, etc., to achieve the effects of high precision, improved ejection ratio, and fast response speed

Active Publication Date: 2022-03-04
金华氢途科技有限公司
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Problems solved by technology

[0013] The purpose of the present invention is to provide a superimposed injection control method based on fuel cell anode pressure variable frequency injection to solve how to make the main circuit work alone to bypass cooperative work in the anode cycle intake scheme of injection valve + ejector + bypass The problem of seamless switching

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  • A superposition injection control method based on fuel cell anode pressure variable frequency injection
  • A superposition injection control method based on fuel cell anode pressure variable frequency injection
  • A superposition injection control method based on fuel cell anode pressure variable frequency injection

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Embodiment Construction

[0043] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0044]The principle of frequency conversion injection is based on the target pressure, and the opening and closing of the injection rail is controlled by setting the pressure fluctuation difference to obtain the upper pressure limit Pu and the lower pressure limit Pd. The values ​​of the upper pressure limit Pu and the lower pressure limit Pd are based on the target pressure, where Pu>Pd, and ...

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Abstract

The present invention proposes a superimposed injection control method based on fuel cell anode pressure variable frequency injection to solve how to make the main road work alone to the bypass cooperative work seamlessly in the anode cycle air intake scheme of injection valve + ejector + bypass switching problem. The present invention increases the bypass injection valve on the basis of the anode circulation air intake scheme of the injector + ejector, so that the flow demand of the injection valve of the main road is reduced, the size of the nozzle of the main road is reduced, and the output pressure fluctuates at a low flow rate The injection ratio is reduced and the ejection ratio is increased; the invention controls the output flow and pressure by means of frequency conversion injection of the main road at low flow rate, full opening of the main road at high flow rate, and bypass frequency conversion injection, which has the characteristics of high precision and fast response speed; The superposition injection control is realized by setting additional pressure upper limit Pu2 and Pd2 on the basis of variable frequency injection to control the operation of bypass or additional injection valve.

Description

technical field [0001] The invention relates to the technical field of fuel cell anode pressure control methods, in particular to a superimposed injection control method based on fuel cell anode pressure variable frequency injection. Background technique [0002] When the fuel cell system is working, due to the reverse osmosis of water on the cathode side, additional gas flow is required on the anode side to drain the water out of the stack to prevent the membrane electrode from being submerged in water and reduce the power generation performance; therefore, the intake of hydrogen needs to be greater than the hydrogen consumption of the anode, that is, the anode’s hydrogen consumption. The intake stoichiometric ratio (anode intake / hydrogen consumption) needs to be greater than 1. [0003] The methods to achieve the anode air gas metering ratio greater than 1 in the fuel cell system include: [0004] a. Intermittently open the tail exhaust valve of the anode, and use the exh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/04746
CPCH01M8/04746H01M8/04776Y02E60/50
Inventor 郭志阳周鸿波陆建山刘志洋包孟嘉
Owner 金华氢途科技有限公司
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