FUEL CELL SYSTEM

To inhibit dew condensation from being caused in a cathode passage by a temperature difference between an internal temperature of a fuel cell stack and a temperature of oxidant gas, which is excess air supplied to the fuel cell stack, prevent flooding from being generated in the cathode passage, and...

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Bibliographic Details
Main Author OKABE YUTA
Format Patent
LanguageEnglish
Japanese
Published 10.07.2023
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Summary:To inhibit dew condensation from being caused in a cathode passage by a temperature difference between an internal temperature of a fuel cell stack and a temperature of oxidant gas, which is excess air supplied to the fuel cell stack, prevent flooding from being generated in the cathode passage, and prevent reduction in power generation efficiency of the fuel cell stack.SOLUTION: At a low temperature, a temperature controller (78) controls a coolant flow amount to a water cooling intercooler (52) so that a temperature of oxidant gas (excess air) supplied from an oxidant gas supplier (20) to an oxidant gas inlet (42) of a fuel cell stack (18) is higher as generation power of the fuel cell stack (18) increases.SELECTED DRAWING: Figure 1 【課題】燃料電池スタックの内部温度と、該燃料電池スタックに供給される過給エアである酸化剤ガスとの温度差によりカソード流路内に結露が発生することを抑制し、カソード流路内でのフラッディングの発生を防止し、燃料電池スタックの発電効率の低下を防止することを目的とする。【解決手段】低温下において、温度調整機（７８）は、燃料電池スタック（１８）の発電電力が増加するに従い、酸化剤ガス供給機（２０）から燃料電池スタック（１８）の酸化剤ガス入口（４２）に供給される酸化剤ガス（過給エア）の温度が高くなるように水冷インタークーラ（５２）への冷媒流量を調整する。【選択図】図１
Bibliography:Application Number: JP20210214771