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System and method for operating fuel cell system

A technology for fuel cell systems, fuel cell vehicles, applied in the field of systems operating fuel cell systems, capable of solving problems such as deterioration of durability of fuel cell stacks, prolongation of potential holding time, etc.

Active Publication Date: 2014-01-15
HYUNDAI MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above method only supplies hydrogen to the anode and cathode to scavenge oxygen during the starting and stopping of the vehicle
Also, since oxygen diffuses into the cathode while the fuel cell vehicle is parked, a hydrogen-oxygen interface is formed at the anode, and at the same time, the potential holding time is prolonged, thereby deteriorating the durability of the fuel cell stack

Method used

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  • System and method for operating fuel cell system
  • System and method for operating fuel cell system
  • System and method for operating fuel cell system

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Embodiment Construction

[0022] Reference will now be made in detail to various embodiments of the invention, examples of which are illustrated in the accompanying drawings and described below. While the invention will be described in conjunction with exemplary embodiments, it will be understood that present description is not intended to limit the invention to those exemplary embodiments. On the contrary, the invention is intended to cover not only the exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments within the spirit and scope of the invention as defined by the appended claims.

[0023] It should be understood that the term "vehicle" or "vehicular" or other similar terms as used herein includes motor vehicles in general, for example, passenger vehicles including sport utility vehicles (SUVs), buses, trucks, commercial vehicles of all kinds, including various watercraft of ships and ships, aircraft, etc., and includes hybrid vehicles, electric veh...

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Abstract

Disclosed are a system and a method for operating a fuel cell system, which improve durability of a fuel cell stack by purging oxygen diffusing into an air electrode of the fuel cell stack while the fuel cell vehicle is parking. That is, the present invention provides a system and a method for operating a fuel cell system, which prevent an interface between oxygen and hydrogen from forming at an anode by periodically supplying hydrogen to a cathode to purge oxygen when the oxygen concentration is greater than a predetermined level to prevent oxygen in the air from diffusing into the cathode while parking the fuel cell vehicle, thus preventing durability of a membrane electrode assembly of a fuel cell stack from deteriorating.

Description

technical field [0001] The present invention relates to systems and methods for operating fuel cell systems. More specifically, the present invention relates to systems and methods for operating a fuel cell system that improve fuel cell stack performance by purging oxygen that diffuses into the air electrodes of the fuel cell stack during parking of the fuel cell vehicle. durability. Background technique [0002] Many automobile companies have started to develop hydrogen fuel cell vehicles in an effort to develop environmentally friendly vehicles to replace gas engine vehicles. A fuel cell system applied to a hydrogen fuel cell vehicle generally includes: a fuel cell stack configured to generate electricity through an electrochemical reaction; a hydrogen supply system configured to supply hydrogen as fuel to the fuel cell stack; a hydrogen supply system configured to supply oxygen-containing air as fuel Oxygen (air) supply system for an oxidant required for electrochemical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04H01M8/06
CPCH01M8/04223H01M2250/20H01M8/04455H01M8/04753H01M8/04798H01M8/04231Y02T90/40Y02E60/50H01M8/04H01M8/10B60L50/50
Inventor 孙翼齐郑贤
Owner HYUNDAI MOTOR CO LTD