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Fuel cell system

A fuel cell system and fuel cell technology, applied in the direction of fuel cells, fuel cell control, fuel cell additives, etc., can solve problems such as uneven humidity

Inactive Publication Date: 2016-01-27
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such membranes are relatively expensive
In addition, it has been observed that with such humidification, the humidity is not uniform in the channels for the passage of gases located on the bipolar plates of the fuel cell

Method used

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  • Fuel cell system
  • Fuel cell system

Examples

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Embodiment Construction

[0021] figure 1 A system is shown comprising a fuel cell 6 of the type having an electrolyte in the form of a polymer membrane, ie of the PEFC (Polymer Electrolyte Fuel Cell) or PEM (Proton Exchange Membrane) type. The fuel cell 6 is supplied with two gases, fuel (vehicle stored or generated on-board hydrogen) and oxidant (air or pure oxygen), which gas supplies the electrodes of the electrochemical cells. To this end, the system comprises two gas circuits: a fuel gas supply circuit (also called anode circuit) and an oxidant gas supply circuit (also called cathode circuit). figure 1 Only elements of the cathode circuit are shown for understanding the invention. Of course, the invention is not limited to these elements, but may include all devices known to a person skilled in the art and which may be used in such a fuel cell system.

[0022] Thus, the device includes an air supply circuit on the cathode side. The circuit consists of an air inlet filter 1 , a flow meter 2 , a...

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Abstract

The invention relates to a fuel cell system comprising a stack of electrochemical cells forming a fuel cell (6) having a polymer ion exchange membrane, a fuel gas supply circuit and an oxidizing gas supply circuit. Said oxidizing gas supply circuit comprises a compressor (3) designed to compress the ambient air prior to entry into the fuel cell (6), and an exhaust outlet (10) designed to evacuate the gases exiting from the fuel cell. Said supply circuit is connected to the fuel cell at a first (7) and a second (8) access point. The system is characterized in that it further comprises a switching element (11) having two positions: a first position in which the compressor (3) outlet is connected to the first access point (7) and the second access point (8) is connected to the exhaust outlet (10), and a second position in which the compressor outlet (3) is connected to the second access point (8) and the first access point (7) is connected to the exhaust outlet (10).

Description

technical field [0001] The present invention relates to fuel cells, in particular, but not exclusively, to fuel cells of the type having an electrolyte in the form of a polymer membrane, ie of the PEFC (Polymer Electrolyte Fuel Cell) type. Background technique [0002] It is known that a fuel cell directly generates electrical energy through an electrochemical redox reaction using a fuel gas and an oxidant gas without requiring a mechanical energy conversion step. The technology is promising, especially for electric vehicle applications. A fuel cell consists of a stack of elementary cells, each of which includes an anode, a cathode, and an ion exchange membrane (which acts as an electrolyte). During fuel cell operation, two electrochemical reactions take place simultaneously: the fuel is oxidized at the anode and the oxidant is reduced at the cathode. These two reactions generate positive and negative ions, which combine at the membrane and generate electricity in the form...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04089H01M8/04119H01M8/0258
CPCH01M8/04089H01M2008/1095H01M8/0432H01M8/04753H01M8/043Y02E60/50H01M8/241H01M8/04223H01M8/2457H01M8/04225H01M8/2483H01M8/04302
Inventor V·布拉亚尔D·奥尔苏马
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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