FUEL CELL UNIT

• Main Authors: NAKAMURA KEN, KAKIMI YOSUKE, AKEMOTO HITOSHI, TOMIMOTO HISAYA, TACHIKAWA KATSUYUKI
• Format: Patent
• Language: English; Japanese
• Published: 19.03.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To stabilize a power generation of a fuel cell stack under an environment where an oxygen concentration of an air supplied to the fuel cell stack is easily deteriorated.SOLUTION: A fuel cell unit FCU is configured to comprise: an air compressor ACP that supplies an air in the fuel cell unit FCU to a fuel cell stack FCS; a fun F; an oxygen concentration detection part OCD that detects the oxygen concentration of a suction air of the fuel cell unit FCU; and a control part CNT. In the case where an oxygen stoichiometric which is obtained by multiplying air stoichiometry and a value obtained by dividing the oxygen concentration detected by the oxygen concentration detection part OCD with a standard oxygen concentration is smaller than a target oxygen stoichiometric, the control part CNT executes at least one of processing for increasing a flow amount of the air supplied to the fuel cell stack FCS by controlling an operation of the air compressor ACP, and processing for performing ventilation in the fuel cell unit FCU by controlling the operation of the fun F.SELECTED DRAWING: Figure 1 【課題】燃料電池スタックに供給される空気の酸素濃度が低下し易い環境下において、燃料電池スタックの発電を安定させる。【解決手段】燃料電池ユニットＦＣＵ内の空気を燃料電池スタックＦＣＳに供給するエアコンプレッサＡＣＰと、ファンＦと、燃料電池ユニットＦＣＵの吸入空気の酸素濃度を検出する酸素濃度検出部ＯＣＤと、制御部ＣＮＴとを備えて燃料電池ユニットＦＣＵを構成し、制御部ＣＮＴは、酸素濃度検出部ＯＣＤにより検出される酸素濃度を標準酸素濃度で除算した値と、エアストイキとを乗算した酸素ストイキが目標酸素ストイキより小さい場合に、エアコンプレッサＡＣＰの動作を制御することにより燃料電池スタックＦＣＳに供給される空気の流量を増加させる処理、または、ファンＦの動作を制御することにより燃料電池ユニットＦＣＵ内を換気させる処理のうち少なくとも１つの処理を実行する。【選択図】図１