SPRING MEMBER, FUEL CELL UNIT, FUEL CELL STACK, AND METHOD FOR MANUFACTURING FUEL CELL STACK

• Main Authors: YAGINUMA, Motoki, KAWASAKI, Koichi, TAJIMA, Norihiro
• Format: Patent
• Language: English; French; German
• Published: 18.11.2020
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

[PROBLEM] To provide a spring member, a fuel cell unit, a fuel cell stack, and a method for manufacturing a fuel cell stack that can prevent a decrease in the power generation performance caused by creep deformation of the spring member.[SOLUTION] A grid spring is provided with a first raised piece 130A that generate an elastic force for pressing a separator 102 toward a power generation cell and a second raised piece 130B that generate an elastic force independently of the first raised piece 130A, wherein the spring constant of the first raised pieces decreases as a result of the heating of the grid spring, the grid spring functions as a high reaction force spring as a result of the larger spring constant of the first spring member relative to the spring constant of the second spring member before heating, and, after being heated, the grid spring functions as a low reaction force spring as a result of the smaller spring constant of the first spring member before being heated.