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Method for accurately obtaining relationship between output current and output power of fuel cell system

A technology of fuel cell system and output current, which is applied in fuel cells, fuel cell additives, fuel cell control and other directions to achieve the effect of reducing experimental cost and time cost, ensuring reliability and improving adaptability

Pending Publication Date: 2021-04-16
佛山仙湖实验室
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is prone to fall into local optimum for multi-parameter fitting problems.

Method used

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  • Method for accurately obtaining relationship between output current and output power of fuel cell system
  • Method for accurately obtaining relationship between output current and output power of fuel cell system
  • Method for accurately obtaining relationship between output current and output power of fuel cell system

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Embodiment Construction

[0037] 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 examples.

[0038] Such as figure 1 and 2 As shown, the present invention provides a method for accurately obtaining the relationship between the output current and output power of the fuel cell system, and the method flow is as follows:

[0039] Step 1: According to the output current-output power characteristic curve of the fuel cell system obtained from the calibration experiment, based on the polynomial fitting method, select the appropriate function equation of the curve to be fitted based on experience;

[0040] In this embodiment, the output current and output power obtained in the calibration experiment have a nearly linear relationship, such as image 3 As shown, the function to select the curve to be fitted according to experience is:

[0041] y=ax 3 ...

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Abstract

The invention discloses a method for accurately obtaining the relationship between the output current and the output power of a fuel cell system. The method comprises the steps: selecting a proper curve function equation to be fitted according to an output current output power characteristic curve obtained by the calibration experiment; combining an experiment and simulink fuel cell modeling simulation to obtain an output current and an output power value; and performing parameter solution of a to-be-fitted curve on the output current and the output power by using a particle swarm algorithm to obtain a relation curve of the output current and the output power of the fuel cell system. The method has the advantages that the reliability of data and models is improved, output current and output power values under different working conditions can be obtained by changing experimental conditions in simulation, the method is used for multi-working-condition research, the adaptability is improved, and the research cost is reduced. A particle swarm algorithm is adopted to solve parameters of a to-be-fitted curve, so the calculation efficiency and the curve precision are improved, and the accuracy of output power control by utilizing the curve is further improved.

Description

technical field [0001] The invention relates to the technical field of fuel cell vehicle control, in particular to a method for accurately obtaining the relationship between output current and output power of a fuel cell system. Background technique [0002] Environmental pollution and energy shortages are becoming more and more serious around the world. Energy conservation and environmental protection are also highly valued in the automotive industry. New energy vehicles have emerged and developed rapidly. Among them, the hydrogen-oxygen fuel cell converts the chemical energy of fuel hydrogen and oxygen into electrical energy through an electrochemical reaction, and is widely used in automotive power systems due to its advantages of high reaction efficiency and non-polluting reaction products. [0003] In order to reasonably allocate the power between different power sources according to the driving conditions of the vehicle, the DC-DC converter is usually connected to the ...

Claims

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Application Information

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IPC IPC(8): H01M8/04298H01M8/04537G06F30/25
CPCY02E60/50
Inventor 杜常清潘童雨张佩武冬梅卢炽华
Owner 佛山仙湖实验室
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