Vehicle-mounted hydrogen supply system hydrogen flow load matching control method and device
A load matching and control method technology, which is applied in the direction of reactant parameter control, electrical components, fuel cells, etc., can solve the problems of aggravating throttling damage and heating, no control method, and affecting the accuracy of fine-tuning components, so as to avoid throttling Exacerbated effects of loss and heat generation
Pending Publication Date: 2022-05-10
TONGJI UNIV
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Problems solved by technology
The secondary pressure reducing valve here is a fixed-value pressure reducing valve, and since the ideal anode pressure corresponding to the stack is different under different loads, there is always a certain margin for the outlet pressure of the secondary pressure reducing valve. In this case When the anode pressure required by the stack is small, there will be a large pressure difference between the two ends of the fine-tuning element between the stack and the secondary pressure reducing valve, which will aggravate the throttling damage and heat generation, and the fluctuation of the pressure difference will also affect the fine-tuning Component Accuracy
[0005] Therefore, in the hydrogen pipeline of the existing hydrogen supply system, there are many deficiencies in flow control and pressure control, and there is currently no control method that can control the above links
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[0037] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.
[0038] This embodiment provides a hydrogen flow load matching control method for a vehicle-mounted hydrogen supply system. The overall control block diagram is as follows figure 1 As shown, the solid line in the figure indicates the transmission path of the gas, and the dotted line indicates the transmission path of the signal. The hardware part of the hydrogen supply system includes high-pressure hydrogen tanks and bottle valves (bottle valves include primary pressure reducing valves), proportional pressure reducing valves (electrically controlled pressure reducing valves), flow cont...
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The invention relates to a vehicle-mounted hydrogen supply system hydrogen flow load matching control method and device, the hydrogen supply system comprises a hydrogen conveying pipeline, hydrogen passes through a proportional pressure reducing valve and a flow control valve in sequence in the hydrogen conveying pipeline, is mixed with hydrogen circulated by a hydrogen circulating pump and then is input into a fuel cell stack; the method specifically comprises the following steps that the outlet pressure of a proportional pressure reducing valve is controlled according to the inlet and outlet pressure ratio of a flow control valve and the outlet pressure of the flow control valve; the opening degree of the flow control valve is controlled according to the outlet pressure of the proportional pressure reducing valve, the outlet pressure of the flow control valve and a given hydrogen molar flow signal under a certain load current; and controlling the rotating speed of the hydrogen circulating pump according to the current of the fuel cell stack required by the load. Compared with the prior art, the method has the advantages that adverse effects in the flow control link and the pressure control link can be eliminated, and the like.
Description
technical field [0001] The invention relates to the technical fields of pneumatic control and new energy, in particular to a hydrogen flow load matching control method and device for a vehicle-mounted hydrogen supply system. Background technique [0002] With the development of society and the advancement of science and technology, energy and environmental issues are increasingly valued by industrial production, and people's demand for clean energy is imminent. Hydrogen is an ideal new energy gas, which has the advantages of wide sources, abundant reserves, no pollution, high energy density and renewable. Fuel cells are widely used as a high-efficiency energy conversion device that converts the chemical energy of hydrogen into electrical energy. Among them, proton exchange membrane fuel cells are widely favored in the field of new energy vehicles, but hydrogen fuel cell vehicles have not been widely used at present. One of the reasons for the popularity of traditional fuel ...
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IPC IPC(8): H01M8/04746H01M8/04089H01M8/0438
CPCH01M8/04783H01M8/04097H01M8/04201H01M8/0438H01M8/04432Y02E60/50
Inventor 李晶张力明平文訚耀保
Owner TONGJI UNIV