METHOD FOR DETERMINING ALCOHOL CONCENTRATION, APPARATUS FOR DETERMINING ALCOHOL CONCENTRATION, AND FUEL CELL SYSTEM INCLUDING SUCH APPARATUS

摘要

A fuel cell system (660) is disclosed which comprises a fuel cell main body (100) which has a solid polymer electrolyte membrane (114) and a fuel electrode (102) and an oxidant electrode (108) arranged on the solid polymer electrolyte membrane (114); a fuel container unit (664) for holding a liquid fuel (124); a proton-conductive polymer film (665) arranged on the fuel container unit (664), a concentration sensing unit (a first electrode terminal (666) and a second electrode terminal (667)) for sensing the alcohol concentration of the liquid fuel (124) in the fuel container unit (664) according to changes in the proton conductivity of the polymer film (665); and a concentration determining unit (670).