FUEL BATTERY

• Main Authors: SHOJI MASASHI, SHIMASAKI YUKIHIRO
• Format: Patent
• Language: English; Japanese
• Published: 14.09.2017
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PROBLEM TO BE SOLVED: To provide a fuel battery which is allowed to take a slim form reduced in thickness, and is arranged so that the increase in contact resistance can be suppressed.SOLUTION: A fuel battery comprises: a stack arranged by laminating single cells each including a membrane-electrode assembly (MEA), first and second gas diffusion layers disposed to hold the MEA therebetween, and first and second separators disposed to hold the MEA therebetween through the first and second gas diffusion layers respectively. The first separator of the first single cell has: a plurality of first concave portions opposed to the second separator of the second single cell; and a plurality of first convex portions formed to be inseparable from the plurality of first concave portions like the two sides of one object, and protruding toward the first gas diffusion layer. The second separator of the second single cell has: a plurality of second concave portions opposed to the first separator of the first single cell; and a plurality of second convex portions formed to be inseparable from the plurality of second concave portions like the two sides of one object, and protruding toward the second gas diffusion layer. A communication path is formed by overlapping at least part of the first concave portion with at least two of the plurality of second concave portions, and the communication path makes a flow path of a cooling medium.SELECTED DRAWING: Figure 1 【課題】薄型化が可能で、接触抵抗の増加を抑制することができる燃料電池を提供する。【解決手段】燃料電池は、膜電極接合体（ＭＥＡ）と、ＭＥＡを挟むように配置された第１及び第２ガス拡散層と、これらをそれぞれ介してＭＥＡを挟むように配置された第１及び第２セパレータと、を備える単セルが、複数積層されたスタックを含む。第１単セルの第１セパレータは、第２単セルの第２セパレータと対向する複数の第１凹部と、複数の第１凹部と表裏一体で第１ガス拡散層側に突出する複数の第１凸部とを備える。第２単セルの第２セパレータは、第１単セルの第１セパレータと対向する複数の第２凹部と、複数の第２凹部と表裏一体で第２ガス拡散層側に突出する複数の第２凸部とを備える。少なくとも一部の第１凹部が、複数の第２凹部のうちの少なくとも２つの第２凹部と重なることで形成される連通路が、冷却媒体の流路を構成している。【選択図】図１