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Fuel cell system including reliable power distributor

A fuel cell system and fuel cell stack technology, which is applied to fuel cells, fuel cell additives, electrochemical generators, etc., can solve problems such as output voltage level fluctuations and can not completely solve the contact point gap.

Active Publication Date: 2009-10-28
DOOSAN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, depending on the environmental conditions of the load at the junction where the system and stack power are combined, and various other control conditions, even the installation of condensers 281, 282, and 283 may not fully resolve the contact gap issue
In addition, there is still a problem that the output voltage level from the third relay 230 fluctuates when the fuel cell system starts and stops operating

Method used

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  • Fuel cell system including reliable power distributor
  • Fuel cell system including reliable power distributor
  • Fuel cell system including reliable power distributor

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Embodiment Construction

[0032] The present invention is described more fully hereinafter with reference to the accompanying drawings, in which typical embodiments of the invention are shown. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

[0033] figure 1 is a schematic diagram of a fuel cell system according to an embodiment of the present invention.

[0034] Such as figure 1 As shown, the present exemplary embodiment includes a fuel cell stack 10 for generating DC power through an electrochemical reaction between hydrogen and oxygen; a fuel processing unit 20 for converting fuel into a hydrogen-rich reformed gas and supplying the reformed gas to the fuel cell stack 10; an oxygen supply unit 30 for supplying an oxygen-containing oxidant to the fuel cell stack 10, a cooling unit 40 for absorbing heat generated from the fuel cell stack 10; a power converter for ...

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Abstract

The present invention relates to a fuel cell system generating electric power using an electrochemical reaction between hydrogen and oxygen. The fuel cell system include power distributor selecting one of a system power source and a fuel cell stack as a power source generating power used for a variety of balance of plants (BOP) and a controller in accordance with an operational condition, and distribute power from the selected power source. The fuel cell system can stably distribute the power to the BOPs and the controller without generating the temporary contact point gap by switching the power source in a state where the system power and the stack power coexist.

Description

technical field [0001] The present invention relates to a fuel cell system that generates electricity using an electrochemical reaction between hydrogen and oxygen. More specifically, the present invention relates to a fuel cell system capable of selecting one of a system power source and a fuel cell stack as a power source for generating various balance of plants (BOP) and controllers according to operating conditions. power source and distributes power from the selected power source. Background technique [0002] A proton exchange membrane fuel cell (PEMFC) uses a proton exchange membrane having hydrogen ion exchange properties as an electrolyte membrane. PEMFCs generate electricity and heat through an electrochemical reaction between hydrogen-containing fuel gas and oxygen-containing air. PEMFC has fast start-up performance and can be designed in a small size. Therefore, PEMFCs are widely used in various applications such as portable power supplies, automotive power su...

Claims

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Application Information

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IPC IPC(8): H01M8/04
CPCH01M8/0612H01M8/04925H01M2008/1095H01M8/04626H01M8/04955H01M8/04223Y02E60/50H02J1/10H01M8/04225H01M8/04228H01M8/04
Inventor 刘渡焕李尚容洪炳善辛美男
Owner DOOSAN CORP
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