第二代Mirai燃料电池电堆制造工程技术简介（堆、催化层、膜电极、电池制造过程、异物检测、外观检测、缩短活化过程）

Production Engineering Technology for theFuel Cell Stack of the Second－Generation Mirai

Takeshi Nagasawa

Atsushi Nogi

Teppei Ikeda

Shimpei Yano

Shinya Takeshita

Takuya Itakura

Abstract

One of the objectives of the fuel cell （FC）stack developed for the second－generation Mirai was to help achieve full－scalepopularization of fuel cell vehicles （FCVs） by expanding productioncapabilities． New mass－production technology was required to achieve thisobjective， including high－speed machining and inspection processes at least tentimes faster than those adopted for the FC stack of the first－generation Mirai．This article describes several of the manufacturing processes that weredeveloped to reduce costs while ensuring quality．

Fig． 1 External Appearance of FC Stack

Fig． 2 Cell Configuration （Outline）

Fig． 3 Flow of FC Stack Manufacturing  Process

Fig． 4 Formation of Catalyst Layer by  Intermittent Coating

Fig． 5 Development of Ionomer Gel  Dispersion Technology

Fig． 6 High－Speed Valve Mechanism in  Process for Second－Generation Mirai

Fig． 7 Flow of Work in MEGA Joining  Process

Fig． 8 Gas Diffusion Layer Breakage  Mechanism

Fig． 9 Cell Creation Process Flow

Fig． 10 Relationship between Well－Glued  and Poorly Glued Metal／Resin Interface

Fig． 11 Chemical Deterioration of Polymer  Electrolyte Membrane

Fig． 12 Divergence between Detected Image  and Actual Size

Fig． 13 Prediction of Foreign Matter Size  Using X－Ray Diffraction Phenomenon

Fig． 14 Imaging Using Dome－Shaped  Illumination Field

Fig． 15 Brightness Range Used for AI  Learning

Fig． 16 SEIRAS

Fig． 17 Results of Impurity Behavior  Observation under Electric Potential Fluctuations

Conclusion

This article has described the advances  and newly developed PE technologies for the second－generation Mirai． Creating  these technologies has improved the space productivity six－fold compared to  the first generation． Although these technologies were developed with the principle  objective of expanding the mass－production potential of the Mirai， volume  production has created new issues． Important knowledge has been obtained by  identifying and resolving these issues one by one． Although many issues still  remain to be solved before fuel cell vehicles can achieve mass market  penetration， Toyota intends to redouble its efforts to develop technologies  that will help to further raise quality， reduce costs， and improve  productivity， and thereby lead the way to the realization of a hydrogen  energy based society．

The cooperation of a wide range of people  inside and outside Toyota played a critical role in the developments  described in this article． The authors would like to take this opportunity to  express their gratitude to everyone involved．

一件事情会做、做好到做精表明不同的能力。这篇没有doi的文章内容很庞杂，很多就是描述性的，接触过的感觉说的都是废话，没接触过的没有背景知识看的有些云里雾里。堆、催化层、膜电极、电池制造过程、异物检测、外观检测、缩短活化过程，每一个部分估计都能写上一份报告。