基于μDMFC电池组极化优化的高能效船载便携式能源研究

随着甲醇动力船成为新能源船舶的发展趋势，微型直接甲醇燃料电池（Micro Direct Methanol Fuel Cell, μDMFC）成为了最适合的船载便携式能源。但是目前μDMFC电池组较低的能效是其最大的瓶颈之一，而极化作用对能效的影响最为显著。对此本项目首先拟基于德拜-休克尔离子氛理论的思想推导极化特性基础理论，解决其极化特性基础理论缺乏的问题；其次基于极化特性理论得出高能效运行参数，通过优化极化过程提升能效，解决能效难以提升的问题；最后基于高能效工作参数与负载需求设计专用的DC-DC进行自适应阻抗变换，实现高效驱动不同船载便携式用电装置，解决其无法同时满足多种负载高效驱动的问题。本项目的预期成果是能效不低于30%的μDMFC电池组，超过当前能效最高的同类产品两倍。本项目的意义在于推动μDMFC在新能源船舶上的应用，减排CO2为我国2060年前“碳中和”的战略目标打前站。

The methanol-powered ships have become the development trend of the new energy ships. As a result, the micro direct methanol fuel cell (μDMFC) will be the most suitable shipborne portable power source. However, the low energy conversion efficiency of the current μDMFC stack is one of the biggest bottlenecks restricting its development, and the polarization has the most significant impact on the energy conversion efficiency. In this condition, this project firstly intends to establish the basic theory of polarization characteristics based on the idea of Debye-Hückel ion atmosphere theory in order to solve the shortage of basic theory on polarization characteristics; Secondly, high-energy-efficiency operating parameters will be obtained based on the theory of polarization characteristics, the energy conversion efficiency will be improved by optimizing the polarization process, the energy conversion efficiency problem will be solved; Finally, a special DC-DC will be designed based on the high-energy-efficiency operating parameters and load requirements in order to perform adaptive impedance conversion and achieve efficient driving of different shipborne portable electric device, the demand of high-efficiency driving of multiple loads will be met. The expected result of this project is a μDMFC stack with an energy conversion efficiency of over 30%, which is twice as much as the similar products with the current highest energy conversion efficiency. The significance of this project is to enhance the application of μDMFC on new energy ships, reduce CO2 and construct the forefront for our country's strategic goal of "carbon neutrality" by 2060.