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

King Saud University

Commissariat a L'energie Atomique

Institut Polytechnique De Grenoble

Nicolas Guillet

Angel Zhivkov Kirchev

Alejandro Franco

Olivier Lemaire

Frederic Fouda-Onana

Sylvain Lespinats

Mélanie Alias

Guillaume Krosnicki

Caroline Rozain

Florence Degret

Galdric Sibiude

Vincent Gau

Lionel Serra

Frédéric Fouda-onana

Frédéric Fouda-Onana

Joseph Ngameni Jiembou

A method for determining a probe signal for acoustically interrogating an electrochemical system, the method including transmitting a first signal, called the calibration signal, including a wave train of multiple frequencies, the spectral density associated with each frequency being identical; receiving the response of the electrochemical system to the calibration signal; determining, on the basis of the received response and for each frequency of the calibration signal, a signal attenuation factor; determining, for each attenuation factor, a correction factor according to the attenuation factor so as to associate a correction factor with each frequency of the calibration signal; and determining the probe signal, the probe signal being obtained by multiplying the spectral density associated with each frequency of the calibration signal by the correction factor corresponding to the frequency in question.

Method for determining a probe signal, method for checking for and detecting a fault in an electrochemical system employing such a signal

A method for managing the thermal behavior of a battery includes employing a thermal model of the battery. The model is configured to estimate, at each point in time, a thermal power generated by the battery depending on a measured electrical power passing through the battery. The thermal model includes a charging law and a discharging law, each law being based on the state of charge of the battery and on its temperature and incorporating the time constant of the battery. The method also includes controlling the thermal power generated by the battery.

Method and device for managing the thermal behavior of a battery

A method determines a probe signal for acoustically characterising an electrochemical system, the probe signal being determined by an identification signal transmitted in a reference electrochemical system to induce a response from the reference electrochemical system.

Method for determining a probe signal, characterisation method using such a signal and device thereof

A method for detecting an anomaly in operating a battery using a battery management system, including an acoustic receiver attached to a battery wall, and a calculating system connected to the acoustic emitter and the acoustic receiver, a mapping defining a first operating region termed the normal operating region, a second operating region termed the at-risk operating region and a third operating region termed the dangerous operating region, the method including at least one first measurement cycle, each being separated from the preceding measurement cycle by a measurement period, each measurement cycle including receiving an acoustic signal by the acoustic receiver, the received signal being transmitted to the calculating system to obtain a measurement point in the mapping; determining the operating region in which the measurement point is located; and when the measurement point is located in the at-risk operating region or in the dangerous operating region, detecting an anomaly.

Method for detecting an operating anomaly of a battery and system implementing said method

A method for detecting a malfunction of an acoustic sensor coupled to an electrochemical generator includes applying an electrical signal at a given frequency and a given amplitude, termed the signal frequency and signal amplitude; measuring, by the acoustic sensor, an acoustic signal emitted by the electrochemical generator in response to the application of the electrical signal; and, when the amplitude of the acoustic signal is below a predetermined threshold value, and detecting a malfunction of the acoustic sensor.

Method for detecting a malfunction of an acoustic sensor coupled to an electrochemical generator and device implementing said method

The invention relates to a method for fabricating nanowires and a method for fabricating an electrode of an electrochemical device. The nanowire fabrication method according to the invention comprises: a) a step of depositing, on one of the faces of the matrix comprising hole openings, at least one porous layer, having a porosity equal to or higher than 26% by volume, of nanoparticles of a conductive material having their smallest dimension at least equal to the diameter of the holes in the matrix, the nanoparticles being in electrical contact with one another, b) growing the nanowires in the holes of the matrix, and c) removing the matrix. The invention has an application in the field of electrochemical devices in particular.

Production of nano-organized electrodes on porous substrate

The invention relates to a method for depositing a metal Monto a carbon layer, as well as to a method for manufacturing an electrode for fuel cells and to a method for manufacturing a fuel cell. The method for depositing a metal Monto a porous carbon layer according to the invention includes a step of depositing said metal Mby means of the electrochemical reduction of an electrolytic solution of a salt of the metal M, and, prior to said step of depositing the metal Mby means of electrochemical reduction, a step of depositing a metal Mby means of chemical reduction using a reducing gas of a salt of the metal M, the thermodynamic equilibrium potential between the ionic form of the salt of Mand M, Ebeing greater than the thermodynamic equilibrium potential between the ionic form of the salt of Mand M, E. The invention can be used, in particular, in the field of fuel cells.

Method for depositing a metal onto a porous carbon layer

A process for manufacturing a catalytic, electrically conductive electrode based on metal particles, comprises: a step of electroplating with a metal salt to form the said metal particles at the surface of an electrode, characterized in that the step of electroplating of the metal salt is performed in the presence of a blocking chemical species with a high power of absorption onto the surface of the said metal particles and with an oxidation potential higher than the reduction potential of the said metal salt such that the blocking chemical species conserves its blocking power during the reduction reaction of the said metal salt, and so as to reduce the size of the metal particles formed, constituting the said catalytic, electrically conductive electrode; and, a step of desorption of the blocking chemical species.

Process for growing metal particles by electroplating with in situ inhibition

The invention concerns an active layer for an electrochemical reactor comprising:&#x2014;a carbon electronic conductor which is not a fullerene as a support; and &#x2014;a catalytic system made up of one or more metals and a fullerene. It also concerns an electrochemical reactor integrating such an active layer.

Electrochemical reactor and active layer integrated into said reactor

A device for determining the CO concentration in a gas containing hydrogen is provided, including a detection electrode in contact with the gas, and a counter electrode, each being in contact with an electrolyte; a current source to deliver a current with a predetermined intensity between the detection electrode and the counter electrode so as to generate, at the detection electrode, an electric potential fluctuating between two threshold values due to the adsorption and desorption of the CO at the detection electrode; a device for measuring the potential; and a calculating device to determine the CO concentration, connected to the current source and to the device for measuring the potential, for calculating a characteristic parameter of the fluctuations of the potential, and for determining the CO concentration from the calculated characteristic parameter and the intensity of the applied current.

Device for determining carbon monoxide concentration and related method

A fuel cell supplies power to a load under nominal conditions. A method for using the fuel cell comprises at least one regeneration step of the performances of the fuel cell by temporarily lowering its temperature below the nominal operating temperature. The regeneration step, performed during a preset time, can be triggered periodically or when the voltage at the terminals of the fuel cell or the fuel cell temperature is lower than a threshold. The performances of the fuel cell, in particular its voltage, can thereby be maintained substantially constant during long periods of use.

Growing community of inventors

Chatuzange le Goubet, France

Nicolas Guillet