Abstract: The invention relates to a device approximately defining an L shape and comprising at least two first nested pipes in the foot of the L (32), and at least one second pipe (36) provided with at least one opening (38), in the leg of the L, the first pipes being arranged in such a way as to define a duct between one end (34) of a first central pipe and said at least one opening (38) by means of passages defined at the ends of the first pipes.

Abstract: A method for preparing self-supporting flexible electrodes is provided using refined cellulose fibers as binder. The negative or positive self-supporting flexible electrode is obtained by such method. A Li-ion battery is also provided in which at least one electrode is a self-supporting flexible electrode.

Abstract: The present invention relates to hollow platinum nanoparticles with a diameter comprised between 3 and 20 nm which comprise a first central cavity and optionally at least one second cavity at the periphery of the first cavity, the shell of which is dense and single-crystal with a thickness comprised between 0.2 and 5 nm. The invention also relates to a method for manufacturing such nanoparticles, as well as to their use as an electrocatalyst in fuel cells.

Abstract: The present invention relates to a set of security documents. Each security document within the set having an optical code, notably a barcode, which is neither connected nor coupled to any electronic chip that may be carried by the security document. The optical code on each security document within the set encodes the same information for the same optical reader. Each security document having different respective electromagnetic signature, these signatures being unique to each of the security documents.

Abstract: Method for monitoring an electrochemical cell or a battery (1), in particular method for monitoring the first charging of an electrochemical cell or of a battery (1) of Li-ion type, comprising a step of acquiring data relating to acoustic emissions produced in the electrochemical cell or in the battery and, by using the data acquired, a step of detecting: the formation of a passivation film on an electrode of the electrochemical cell or of the battery; and/or the first storage of lithium in an electrode of the electrochemical cell or of the battery.

Abstract: The invention concerns a device (4) for connecting a radio frequency circuit (3) or component printed on a flexible support (2) to a coaxial cable, comprising: —a first part (14) suitable for being disposed against a first face (5) of the support (2) on which the circuit or the component (3) is printed, the first part (14) comprising a recess capable of housing a coaxial cable connector (13), —a second part (15) capable of being disposed against a second face (6) of the support (2), opposite the first face, and in which the first part (14) and/or the second part (15) comprises attachment means for attaching the first part (14) and the second part (15) to each other, the flexible support (2) being clamped between the first part (14) and the second part (15), in such a way as to maintain an electrical contact between the connector (13) and the circuit or component (3).

Abstract: An energy harvester having a converter suitable for converting a variation of the energy to be harvested into a corresponding excess of electrical charges. There is a circuit for collecting the excess of electrical charges, the circuit is equipped with a controllable switch and a control device for the switch designed to control the switching of this switch to its closed position. The control device is suitable for exerting a force which stresses the electrical contacts towards one another. The force varies continually as a function of the quantity of electrical charges present on the first terminal and bringing the electrical contacts to bear on one another only when the excess of electrical charges exceeds a predetermined threshold, and/or for ionizing the electrically insulating medium to produce an electrical arc between the two electrical contacts only when the excess of electrical charges exceeds the predetermined threshold.

Abstract: A method and a system for controlling the switching time of a device that includes a magnetic circuit and a conductive winding. The method includes acquiring a measurement of the magnetic field generated by the residual flux, by a sensor placed near the magnetic circuit; processing the acquired measurements to infer the residual flux in the magnetic circuit; determining, on the basis of the residual flux, the optimal time for switching on the device. The method also includes switching on a three-phase transformer. The transformer includes a primary conductive winding and a secondary conductive winding surrounded by an enclosure. A magnetic field sensor is on the magnetic circuit and/or on one outer surface of the enclosure.

Abstract: A method for removing a part from a mold and to a machine for molding the part, the part made of a material having a glass-transition temperature and a melting temperature that is higher than the glass-transition temperature, and which is shaped in the cavity of a mold, includes at least two mold portions defining the shaping cavity therebetween. The mold is at a temperature between the glass-transition temperature and the melting temperature. The method includes opening the mold by spacing apart the mold portions, locally spraying a cooling gas toward the part remaining in a portion of the mold using at least one nozzle, and, after a predetermined time period following the start of spraying the gas, ejecting the part from the portion of the mold, the time period being such that the part reaches a temperature that is lower than the glass-transition temperature thereof.

Abstract: The disclosure relates to a method for the crystallogenesis of a material that is electrically conducting at the molten state, by drawing from a molten mass of the material in a crucible, that comprises: progressively subjecting the molten material to a decreasing temperature so that a liquid-solid interface is formed; controlling the flatness of the liquid-solid interface of the material; subjecting the molten material, before and during solidification, to an electromagnetic kneading; the method including that the electromagnetic kneading is obtained by applying an alternating magnetic field. The disclosure also relates to a device for implementing the method.

Abstract: System for balancing an association in series of elements for generating and/or storing electrical energy has full bridge inverters (OPC1, OPC2, OPCN), with two inverter arms connected in parallel between two end ports and with two switches (Th1, Tb1; Th2, Tb2) connected in series by a median point (P11, P12) of the arm; a plurality of connectors for connecting the two end ports of each full bridge inverter to a respective element (CA1, CA2, CAN, PV1, PV2, PVN) of said association in series; and a magnetic coupler (NM) formed by a magnetic core on which a plurality of windings (W1, W2, WN) is formed, each winding connected to the median points of the arms of one of said inverters. A series of elements (CA1, CA2, CAN) for electrochemical storage of electrical energy and a series of photovoltaic cells (PV1, PV2, PVN) provided with such a balancing system are also disclosed.

Abstract: A method for pre-programming a matrix of phase-change memory cells, including a phase-change material positioned between two conducting electrodes and able to be reversely electrically modified so as to vary the resistivity of the memory cell. A dielectric layer is provided with the memory cell having an original resistive state at the end of the memory cell production process. A pre-programming of the matrix is executed prior to mounting a component containing the matrix on a support. A breakdown voltage is applied to a selection of memory cells so that, for each one of the selected cells, the layer of the dielectric material breaks down to bring the cell from the original resistive state to a second resistive state.

Abstract: An RFID communication system comprises an interrogator including a signal generator for generating an interrogation signal at a predetermined frequency f0 and a first interrogator antenna for transmitting said interrogation signal and receiving a first reply signal at a frequency f0, and processing means, and a passive transponder including a first transponder antenna for transmitting said first rely signal and receiving said interrogation signal and a chip comprising nonlinear components for generating said first reply signal in response to the interrogation signal. The interrogator is arranged to receive a second reply signal whose frequency is a multiple of the predetermined frequency f0, said multiple being either odd or even, said second reply frequency being generated by the nonlinear components of the transponder chip, said first and second reply signals being processed by the processing means of the interrogator in order to complete or improve the functionality of the system.

Abstract: A converter including a first transducer that can lengthen inside at least a first deformation zone and simultaneously shrink inside at least a different second deformation zone. Inner faces of second and third electromechanical transducers are secured respectively, with no degree of freedom, substantially to the first and second deformation zones of the layer of the first transducer. The third transducer differs from the second transducer by the polarization of its layer of piezoelectric material in a different direction to polarization of the layer of piezoelectric material of the second transducer and/or by existence of a separation that mechanically and electrically insulates a first electrode of the third transducer from a first electrode of the second transducer located on a same side of the layer of piezoelectric material.

Abstract: Method for determining the state of health of a battery, using a sensor of the acoustic activity of the battery, comprising the following steps: detection of at least one acoustic event by the sensor; determination of the value of at least one parameter for each acoustic signal detected in the course of the elementary cycle of use; calculation, for the elementary cycle of use, of a value of acoustic density according to a density calculation function taking into account said at least one parameter determined for each of the acoustic signals detected in the course of the cycle; calculation of a state of health value corresponding to said previously calculated acoustic density value, on the basis of a functional relation or a predetermined database, making it possible to know the state of health for a given acoustic density value.

Abstract: A method for producing a network of nanostructures from at least one semiconductor material, including a step of forming nanostructures on the surface of a substrate, at least a part of the nanostructures having areas of contact between each other, comprising, in sequence and after the step of forming: a step of deoxidising the surface of the nanostructures and a step of reinforcing the bond between the nanostructures at the contact areas.

Abstract: The present invention relates to a membrane that includes a porous polymer material made of a polyimide with interconnected macropores and impregnated with protic ionic liquid conductors (CLIP), as well as to the method for manufacturing same and to the uses thereof. The membranes of the invention fulfill the need for membranes including CLIPs, which have good proton-conducting properties as well as good physical properties, in particular high thermal and mechanical stability, in addition to a wide range of electrochemical stability.

Abstract: A method for producing a Schottky diode, including the following steps: oxygenating the surface of a semiconductive layer of monocrystalline diamond, in such a way as to replace hydrogen surface terminations of the semiconductive layer with oxygen surface terminations; and forming, by physical vapour deposition, a first conductive layer of zirconium or indium-tin oxide on the surface of the semiconductive layer.

Abstract: A digital control device for a parallel PMOS transistor board, includes: an operative memory for digitally storing error data between a target voltage and a setpoint voltage as well as control data, each datum being provided with a time marker, a digital selected order filter (36) for computing setpoint incrementation data from error data in the operative memory selected based on input error data, and for storing the input error data with a corresponding time marker in the operative memory, and a control computer (38) for computing new control data from the control incrementation data and control data in the operative memory selected based on input error data and for storing the new control data in the operative memory.

Abstract: The invention relates to processes for coating a surface with a crosslinked polyelectrolytes multilayer film incorporating a protein, preferably a growth factor type protein. The invention also relates to crosslinked polyelectrolytes multilayer films obtained by this process, and a coated surface obtained therefrom.