METHOD OF MEASURING DEFLECTION OF DIFFUSION LAYER AND SURFACE PRESSURE VALUE

• Main Authors: NAKANISHI JUNJI, HARADA TAKESHI, IDA ATSUMI
• Format: Patent
• Language: English; Japanese
• Published: 30.10.2014
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; TESTING

PROBLEM TO BE SOLVED: To provide a technology of accurately calculating the amount of deflection of a diffusion layer and a surface pressure value.SOLUTION: A method of measuring the amount of deflection of a diffusion layer of a fuel cell includes the steps of: (a) setting a stiffness matrix of the diffusion layer; (b) calculating strain; (c) calculating strain to be obtained when tensile load is applied to the diffusion layer; (d) comparing calculation results of the steps (b) and (c) with results of a compression test and a tensile test of the diffusion layer, to optimize the stiffness matrix; (e) calculating the amounts of deflection by means of a finite-element method, by use of the stiffness matrix optimized in the step (d), according to a preset experiment schedule; (f) forming a response curved surface on the basis of the amounts of deflection calculated in the step (e); and (g) creating a calculation formula for calculating the amount of deflection on the basis of the response curved surface. 【課題】拡散層の撓み量や面圧値を精度良く算出できる技術を提供する。【解決手段】燃料電池の拡散層の撓み量を測定する方法であっては、（ａ）拡散層の剛性マトリックスを設定する工程と、（ｂ）ひずみを計算する工程と、（ｃ）拡散層に引張荷重を加えた際のひずみを計算する工程と、（ｄ）工程（ｂ）および工程（ｃ）の計算結果と、拡散層の圧縮試験および引張試験の試験結果を比較して、剛性マトリックスを最適化する工程と、（ｅ）予め定めた実験計画に従って、工程（ｄ）によって最適化した剛性マトリックスを用いて有限要素法による撓み量を複数計算する工程と、（ｆ）工程（ｅ）によって計算された複数の撓み量に基づいて応答曲面を作成する工程と、（ｇ）応答曲面に基づいて、撓み量を計算するための計算式を作成する工程と、を備える。【選択図】図２