PEMFC (proton exchange membrane fuel cell) temperature control method

A temperature control method and proton exchange membrane technology, which are used in fuel cells, fuel cell additives, fuel cell heat exchange, etc., can solve the problem of thermal delay of fuel cells, and the temperature control effect of fuel cells is not good and cannot be solved. Time delay problem and other problems, to achieve the effect of improving anti-disturbance ability and adaptive ability, making up for low steady-state accuracy and high reliability

Active Publication Date: 2018-06-08
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

The proton exchange membrane fuel cell is a complex dynamic system with nonlinear, strong coupling and long time delay. The above control method can realize the control of the temperature of the fuel cell, but cannot obtain better control effect
PID and LQR feedback control have high requirements on model accuracy and cannot solve the time delay problem; fuzzy control is based on expert experience control, which can overcome the model uncertainty problem, but cannot solve the

Method used

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  • PEMFC (proton exchange membrane fuel cell) temperature control method
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  • PEMFC (proton exchange membrane fuel cell) temperature control method

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Embodiment

[0042] figure 1 It is a principle diagram of a temperature control method for a proton exchange membrane fuel cell of the present invention.

[0043] In this example, if figure 1 As shown, the system structure of a proton exchange membrane fuel cell temperature control method mainly includes: 1. Gray prediction model GM(1,1); 2. Fuzzy controller; 3. PID controller. Combining the gray prediction module and fuzzy control as a feed-forward controller is used to compensate the thermal time delay of the fuel cell and deal with parameter uncertainties and external disturbances. The PID feedback controller is used as a feedback controller to improve the stability of the control. By using the advantages of these three types of controllers, the anti-disturbance ability, self-adaptive ability and control precision of the system are effectively improved.

[0044] Specifically, the proton exchange membrane fuel cell thermal management system such as figure 2 As shown in Fig. 1, the wa...

example

[0122] The present invention is further described by taking the temperature control example of the proton exchange membrane fuel cell. In the thermal management system of proton exchange membrane fuel cells, such as figure 2 , both the temperature controller and the temperature difference controller adopt the temperature control method proposed by the present invention. During the operation of the fuel cell, external disturbances will affect the temperature of the fuel cell. In order to ensure the stable operation of the proton exchange membrane fuel cell, it is necessary to control the temperature of the fuel cell stack to 340K, and to control the temperature difference between the inlet and outlet of the cell stack at 6K.

[0123] The following is the simulation result of applying the control method of the present invention to the temperature control of the proton exchange membrane fuel cell. First determine the simulation parameters in the temperature controller and tempe...

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Abstract

The invention discloses a PEMFC (proton exchange membrane fuel cell) temperature control method. The method comprises the following steps of using a PID (proportion integration differentiation) controller as a common feedback controller to stabilize the temperature of a fuel cell stack to achieve an initial control effect, and then obtaining a variation trend of the temperature of a fuel cell system according to the forward predictive function of a grey model, wherein a fuzzy controller is utilized to obtain predictive information to compensate the uncertainty and external interference of thesystem so that the control accuracy of the system is further improved. Feedforward compensation control and feedback control function together to realize accurate control of PEMFC temperature.

Description

technical field [0001] The invention belongs to the technical field of proton exchange membrane fuel cells, and more specifically relates to a temperature control method for proton exchange membrane fuel cells. Background technique [0002] Proton Exchange Membrane Fuel Cell (PEMFC) is a device that directly converts hydrogen energy into electrical energy. It has the advantages of high specific energy, low operating temperature, and start-up speed. It is considered to be a very attractive power generation device. [0003] Although the application prospect of fuel cell is broad, its overall popularization is still restricted by some objective reasons, such as the control technology is not very mature, especially in temperature control. The internal electrochemical reaction process of PEMFC is directly reflected in the change of stack temperature and temperature distribution. Once the temperature control effect is unsatisfactory, too high or too low working temperature will ...

Claims

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Application Information

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IPC IPC(8): H01M8/04701H01M8/04992H01M8/04746H01M8/04029H01M8/04007
CPCH01M8/04029H01M8/04074H01M8/04701H01M8/04708H01M8/04768H01M8/04992Y02E60/50
Inventor 邹见效谢雨岑彭超徐红兵
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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