Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Peugeot Citroen Automobiles Sa

Université De Franche Comte

Institut Francais Des Sciences Et Technologies Des Transports, De I'amenagement Et Des Reseaux

Psa Automobiles Sa

UniversitÉ Gustave Eiffel

Fabien Harel

Francis Roy

Patrick Le Gallo

Xavier Glipa

Pascal Schott

Eric Pinton

Sylvie Begot

Jean-Marc Le Canut

Guillaume Joncquet

Sadok Garnit

Daniel Hissel

Sébastien Faivre

Frédéric Gustin

Zhongliang Li

Jean-Philippe Poirot Crouvezier

Pierre Picard

Denis Candusso

Djedjiga Benouioua

Jean Francois Ranjard

Jean-François Ranjard

A method for diagnosing the operating state of an electrochemical system in real-time comprising a stack of cells, said method comprising steps for performing voltage measurements of said cells. Said method further comprises: real-time processing of the voltage measurements () thus performed, in order to extract specific waveforms () therefrom, converting said specific waveforms in order to generate specific points () therefrom of the real-time operation of the electrochemical system, and comparing these specific points of the real-time operation and specific points () of an off-line operation of the electrochemical system that originate from a conversion of specific waveforms () extracted from voltage measurements () performed off-line, while the electrochemical system is placed in known operating states including fault states, so as to produce information () relating to the real-time operating state of the electrochemical system.

Method and system for diagnosing the operating state of an electrochemical system in real-time, and electrochemical system incorporating this diagnostic system

The invention relates to a cooling system for a fuel cell (), comprising a main heat-transfer-fluid circuit including a main circulation pump () and a heat exchanger () with the exterior, which feed an upstream pipe () supplying the fluid to the cells () of the fuel cell, said fluid leaving the cells via a downstream pipe () in order to return to the main pump. The system is characterised in that a secondary circuit, comprising a secondary circulation device () that circulates the fluid in an alternate manner, is connected in parallel with the main circuit to the upstream () and downstream () pipes and in that one or more controlled valves () allow the main circuit and the secondary circuit to operate independently.

Cooling system for a fuel cell

The invention relates to a cooling system for a fuel cell, comprising a main heat-transfer-fluid circuit including a circulation pump () and a heat exchanger () with the exterior, which feed an upstream pipe () supplying the fluid to the cells () of the fuel cell, said fluid leaving the cells via a downstream pipe () in order to return to the main pump. The invention is characterized in that the main circuit comprises a three-port controlled valve () on each upstream () and downstream () pipe, the third available port () of the upstream pipe () being connected to the inlet of the pump () and the third available port () of the downstream pipe () being connected to the outlet of the pump in order to establish a secondary fluid circuit.

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Giromagny, France

Fabien Harel