Abstract: 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.

Abstract: Method for diagnosing and predicting the lifespan of lead-based batteries, especially lead-based batteries intended to store standby power. The invention essentially consists in a new method for diagnosing lead-acid batteries and advantageously for estimating their remaining lifespans, the batteries more particularly being intended for standby storage applications. The method is based on a combination of continuous monitoring measurements with integration of the over-charging current (computation of the over-charging Ah applied to the battery from its installation) and of periodic measurements under DC current of the internal resistance of the battery using short discharging periods with a constant current or a constant power.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: The invention relates to a method for depositing a metal M1 onto 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 M1 onto a porous carbon layer according to the invention includes a step of depositing said metal M1 by means of the electrochemical reduction of an electrolytic solution of a salt of the metal M1, and, prior to said step of depositing the metal M1 by means of electrochemical reduction, a step of depositing a metal M2 by means of chemical reduction using a reducing gas of a salt of the metal M2, the thermodynamic equilibrium potential between the ionic form of the salt of M2 and M2, Eeqionic form of the salt of M2/M2 being greater than the thermodynamic equilibrium potential between the ionic form of the salt of M1 and M1, Eeqionic form of the salt of M1/M1. The invention can be used, in particular, in the field of fuel cells.

Abstract: 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.

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

Abstract: A process for the synthesis of particles of bimetal catalyst based on platinum and on at least one second metal comprises the chemical reduction of a first platinum-based salt or complex and of at least one second salt or complex based on the second metal, the chemical reduction comprising the following stages: the preparation of a mixture comprising the first platinum-based salt or complex and the second salt or complex based on the second metal, in the presence of a pure reducing agent in the liquid form under ambient temperature and pressure conditions, the conditions being respectively defined as equal to 25° C. and 100 kPa; bringing the mixture to a temperature between approximately the freezing temperature of water and the freezing temperature of the reducing agent.

Abstract: A catalytic cathode, intended for a lithium-air battery comprising catalytic particles supported on electron-conducting particles, comprises a first face intended to be in contact with an ion-conducting material and a second face intended to be in contact with atmospheric oxygen, and comprises at least: a first catalytic layer intended to be in contact with the ion-conducting material, and; a second catalytic layer intended to be in contact with atmospheric oxygen, characterized in that: said first layer comprises first entities of catalytic particles promoting the reaction for the oxidation of lithium-based products, said entities being based on cobalt or on nickel; said second catalytic layer comprises second entities of catalytic particles promoting the reaction for the reduction of oxygen, said second entities being based on manganese or on silver or on platinum. A lithium-air battery comprising the cathode is also provided.

Abstract: The present invention relates to the use, as a precursor for the chemical vapour deposition of PtSi at the surface of a support, of at least one organometallic complex of Pt comprising at least:—a ligand having a cyclic structure that comprises at least two non-adjacent C?C double bonds, or two ligands having a cyclic structure that each comprise a C?C double bond; and—a ligand chosen from *O—Si(R)3 and *N—(Si(R)3)2, with: the R units being chosen, independently of one another, from (C1-C4)alkoxy groups; the R? units being chosen, independently of one another, from (C1-C4)alkyl and (C3-C4)cycloalkyl groups; and * representing the coordination of the ligand to the platinum.

Abstract: A membrane-electrode assembly for an electrolysis device includes a proton-exchange membrane, an anode and a cathode disposed on either side of the proton-exchange membrane, a first conductive catalyst disposed within the proton-exchange membrane, and a first conductive junction linking the first conductive catalyst and the cathode. The first conductive junction has an electrical resistance greater than a proton resistance of the membrane between the first conductive catalyst and the cathode.

Abstract: 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.

Abstract: 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.

Abstract: The invention relates to a method for depositing a metal M1 onto 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 M1 onto a porous carbon layer according to the invention includes a step of depositing said metal M1 by means of the electrochemical reduction of an electrolytic solution of a salt of the metal M1, and, prior to said step of depositing the metal M1 by means of electrochemical reduction, a step of depositing a metal M2 by means of chemical reduction using a reducing gas of a salt of the metal M2, the thermodynamic equilibrium potential between the ionic form of the salt of M2 and M2, Eeqionic form of the salt of M2/M2 being greater than the thermodynamic equilibrium potential between the ionic form of the salt of M1 and M1, Eeqionic form of the salt of M1/M1. The invention can be used, in particular, in the field of fuel cells.

Abstract: The invention relates to a method for fabricating nanowires and a method for fabricating an electrode of an electro-chemical 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.