Temperature control method of proton exchange membrane fuel cell

Abstract

The invention discloses a temperature control method of a proton exchange membrane fuel cell. The method comprises the following steps: step 1, establishing a temperature model of a proton exchange membrane fuel cell according to physical properties of each device in the proton exchange membrane fuel cell; step 2, arranging an incremental fuzzy controller according to the established temperature model and a control experience rule, and establishing a temperature closed-loop control algorithm of the proton exchange membrane fuel cell by utilizing the incremental fuzzy controller; step 3, controlling the temperature of the proton exchange membrane fuel cell in real time by utilizing the incremental fuzzy controller according to the temperature closed-loop control algorithm. The incremental fuzzy controller is used for performing the fuzzy control and is set according to the control experience rule, no precision mathematic model is needed, the temperature control method has the advantages of high robustness, simplicity in operation, rapidness in response, easiness in modification and the like, a PEMFC (proton exchange membrane fuel cell) galvanic pile is maintained at a fixed temperature, and electrochemical reaction inside the PEMFC can be safely and efficiently carried out.

Description

technical field [0001] The invention relates to a combustion cell, in particular to a temperature control method for a proton exchange membrane fuel cell. Background technique [0002] A fuel cell is a clean and efficient distributed power source that converts the chemical energy of hydrogen-containing fuel directly into electrical energy without a combustion process under the action of a catalyst. Proton exchange membrane fuel cell (protonexchangemembranefuelcell, PEMFC), as the most likely commercial fuel cell, has the advantages of low operating temperature, high current density, fast response, etc., and has broad application prospects. [0003] In the operation of PEMFC, more than half of the energy is output in the form of heat, so effective temperature management is the key to ensure battery performance. At the same time, temperature also affects the operating characteristics of the battery. When the temperature is low, various polarizations in the battery are enhance...

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Problems solved by technology

At the same time, temperature also affects the operating characteristics of the battery. When the temperature is low, various polarizations in the battery are enhanced, and the ohmic impedance is also large, which will reduce the performance of the battery; when the temperature rises, the ohmic impedance will be reduced and the polarization loss will be reduced. , which is conducive to the occurrence of electrochemical reactions, but too high a temperature will lead to dehydration of the proton exchange membrane, a decrease in conductivity, deterioration of battery performance and even membrane rupture

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