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Anode recirculation for a parallel dual stack fuel cell system

A fuel cell and fuel cell stack technology, which is applied to fuel cell components, fuel cells, fuel cell grouping, etc., can solve the problems of cathode catalyst degradation, lower cell stack voltage, shortened cell stack life, etc., to increase anode circulation. effect of speed

Inactive Publication Date: 2008-07-16
GM GLOBAL TECH OPERATIONS LLC
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  • Abstract
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AI Technical Summary

Problems solved by technology

Liquid water on the anode side can lead to degradation of the cathode catalyst, thereby reducing the voltage of the stack and shortening the life of the stack

Method used

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  • Anode recirculation for a parallel dual stack fuel cell system

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Embodiment Construction

[0015] The following detailed description and accompanying drawings describe and illustrate various exemplary embodiments of the invention. The description and drawings are provided to enable a person skilled in the art to make and use the invention and are not intended to limit the scope of the invention in any way. With respect to the disclosed methods, the steps presented are exemplary in nature and, therefore, the order of the steps is not required or critical.

[0016] Referring to FIG. 1 , there is shown a parallel dual stack fuel cell system, generally designated 10 , with an anode recirculation loop. System 10 includes a first fuel cell stack 12 and a second fuel cell stack 14 .

[0017] A series of gas lines are provided to allow gas flow through the recirculation system of the present invention. Insulate these gas lines to minimize condensation. A common gas inlet line 16 is provided to introduce dry gas into the cathode sides of the first fuel cell stack 12 and t...

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Abstract

The present invention relates to a parallel dual stack fuel cell system having an anode recirculation comprising a first fuel cell stack and a second fuel cell stack. Each of the first and second fuel cell stacks includes a gas outlet line connected to the anode outlet unit. This anode outlet unit is used to remove the wet H2 / N2 gas mixture from the system. A second water separator is provided between the anode outlet unit and the gas inlet lines to the first and second fuel cell stacks to increase water droplet removal prior to the recirculation pump.

Description

technical field [0001] The invention relates to a fuel cell system, in particular, the invention relates to a double-stack fuel cell system and the anode recirculation of the parallel double-stack fuel cell system. Background technique [0002] Fuel cells are often seen as an alternative to known energy technologies. PEM (Proton Exchange Membrane) fuel cells, commonly known as PEM fuel cells, produce low emissions and operate with high efficiency. Basically, a fuel cell converts chemical energy into electricity. More specifically, fuel cells in use today include a cathode region and an anode region. The anode and cathode are separated by a solid polymer electrolyte membrane. A fuel cell stack generates electricity through an electrochemical reaction between hydrogen and oxygen. In particular, hydrogen-rich gas is provided to the anode side of the fuel cell. An oxygen-containing oxidant (usually atmospheric oxygen) is provided to the cathode of the fuel cell. Hydrogen m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/24H01M8/02H01M8/04
CPCH01M8/04097H01M8/04179H01M8/249Y02E60/50
Inventor D·R·萨瓦奇J·P·萨尔瓦夺J·R·谢恩科夫斯基
Owner GM GLOBAL TECH OPERATIONS LLC
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