Stack having reforming function and fuel cell system having the same

Abstract

There is provided a fuel cell system comprising a stack (10) including at least one electricity generator (20) generating electric energy through a reaction between hydrogen and oxygen and a fuel processing unit (30) which is integrally coupled to the electricity generator (20) and which generates hydrogen from fuel and supplies the generated hydrogen to the electricity generator (20) a fuel supply unit supplying the fuel to the fuel processing unit (30) and an oxygen supply unit supplying oxygen to the electricity generator (20) and the fuel processing unit (30).

Description

technical field [0001] The present invention relates to a fuel cell system, in particular to a cell stack of the fuel cell system. Background technique [0002] As is well known, a fuel cell is a system that generates electricity through an electrochemical reaction between oxygen and hydrogen contained in hydrocarbons such as methanol, ethanol, natural gas, and the like. [0003] Polymer electrolyte membrane fuel cells (hereinafter abbreviated as PEMFCs) having excellent output characteristics, low operating temperature, and quick start-up and response characteristics have recently been developed. Therefore, the PEMFC can be widely used including mobile power sources for vehicles, distributed power sources for homes or buildings, and small power sources for electronic devices. [0004] A fuel cell system using a PEMFC type mainly requires a cell stack, a reformer, a fuel tank, and a fuel pump. The battery stack consists of an electricity generation set with multiple unit c...

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Problems solved by technology

[0006] Conventionally, since the battery stack and the reformer are separately arranged and coupled to each other as a system, the structure is complex and the supply area is large, which brings difficulty in system manufacture and size reduction

[0007] From the perspective of thermal efficiency, in a conventional fuel cell system, since the reformer and the battery stack are set and work in different places, that is, since the reformer and the battery stack are set separately, and the hydrogen produced by the reformer is Provided to the battery stack to generate electricity, the heat generated by each part cannot be effectively used, so it is difficult to improve the thermal efficiency of the entire system

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