METHOD FOR OPERATING FUEL CELL SYSTEM AND FUEL CELL SYSTEM

• Main Authors: SHIMOMICHI TAKESHI, HIDAI MASAKAZU, YAMASHITA KYOHEI, MAEKAWA TAKESHI, OTSUKA NAOTO
• Format: Patent
• Language: English; Japanese
• Published: 30.06.2022
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide a method for operating a fuel cell system with which it is possible to obtain the necessary output with good efficiency, and a fuel cell system.SOLUTION: Provided is a method for operating a fuel cell system that comprises a fuel cell stack; and an auxiliary equipment group composed of at least fuel gas supply means for supplying a fuel gas to the fuel cell stack, air supply means for supplying air to the fuel cell stack, cooling water supply means for supplying cooling water to the fuel cell stack, and a radiator for heat-exchanging the cooling water. This method includes: a step in which, when the present output current is raised to a target output current, the auxiliary equipment motive power of at least one in the auxiliary equipment group is kept lower than the auxiliary equipment motive power that corresponds to the target output current while the output current is raised; and a step in which the auxiliary equipment motive power kept lower than the auxiliary equipment motive power corresponding to the target output current is, thereafter, raised to the auxiliary equipment motive power that corresponds to the target output current.SELECTED DRAWING: Figure 2 【課題】効率良く必要な出力を得ることのできる燃料電池システムの運転方法及び燃料電池システムを提供する。【解決手段】燃料電池スタックと、少なくとも、燃料電池スタックに燃料ガスを供給する燃料ガス供給手段と、燃料電池スタックに空気を供給する空気供給手段と、燃料電池スタックに冷却水を供給する冷却水供給手段と、冷却水を熱交換するためのラジエータとからなる補機群と、を具備した燃料電池システムの運転方法において、現在の出力電流を、目標の出力電流まで上昇させる際に、補機群のうちの少なくとも１つの補機動力を、目標の出力電流に応じた補機動力より低い状態としたまま、出力電流を上昇させるステップと、この後、目標の出力電流に応じた補機動力より低い状態とした補機動力を、目標の出力電流に応じた補機動力に上昇させるステップと、を具備している。【選択図】図２