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In order to ensure the output performance, sealing, reliability and service life of the Proton Exchange Membrane Fuel Cell (PEMFC) stack, theoretical calculation and design optimization of the packaging force and packaging structure of the stack are required. By establishing the equivalent stiffness mechanical model and relevant empirical formula of PEMFC stack, the relationships between the contact resistance of Membrane Electrode Assembly (MEA), the porosity of Gas Diffusion Layer (GDL), the sealing and impact resistance of the stack and the packaging force of the stack are studied. For the finite element simulation of the packaging force of the stack, the simulation optimization method based on the equivalent area and equivalent stiffness is studied. Finally, the design method and structure optimization method of the stack packaging structure are elaborated. The results show that based on the equivalent stiffness mechanical model and empirical formula, the theoretical calculation of the packaging force of the stack can be completed in a relatively short time, and the development efficiency is improved. At the same time, the finite element simulation method can be more accurate and intuitive to complete the design and optimization of the packaging force of the stack. Topology optimization and self-compensation calculation method of packaging force are adopted to improve the rationality of packaging structure design.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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