Abstract: A multilayer film may be applied preferably against a busbar of a battery module. Such a multilayer film may include at least one encapsulation layer made of plastic and a layer of aqueous gel, configured to be placed facing at least a portion of the busbar, encapsulated at least partially by the encapsulation layer.

Abstract: A safety device adapted to an electrochemical cell, the cell having a container in which a coil is placed, the container including at least one first wall provided with at least one rupture initiator, designed to break in the event of a fault so as to expel the gases, and a second wall arranged to ensure the coil is held in said container, the safety device has a holding device arranged to ensure an abutment against said second wall of the cell so as to hold it in position in the event of thermal runaway and to retain the coil on the inside of the container, a gas releasing device, arranged to ensure the expulsion of the gases from the cell, in the event of thermal runaway.

Abstract: A process for inerting electrochemical accumulators, especially metal-ion accumulators, by initial immersion in a solution of calcium chloride at low temperature, followed by electrical short-circuiting in preparation for their shredding. The invention consists essentially of the generation of a short circuit in electrochemical accumulators immersed in an aqueous CaCl2 solution, the low temperature of which in the liquid state, typically -50° C., ensures thermal absorption of the heat evolved by the accumulators and therefore reliably prevents them from undergoing thermal runaway, said short-circuiting taking place prior to, and separately from, the shredding of the accumulators.

Abstract: A nebulizer may be into in a battery module, the nebulizer being configured to atomize a liquid, preferably water, contained in a tank, above a threshold temperature characteristic of a thermal runaway, the microdroplets thus created being sprayed within the module to absorb the energy created by the thermal runaway.

Abstract: A system for extinguishing a fire and/or preventing a fire from starting or restarting in an electric vehicle, associated method of operation including a prior step of lifting the vehicle off the ground. In particular, the system for extinguishing the fire and/or preventing the fire from starting or restarting in the electric vehicle, which incudes, a module or a battery pack comprising a plurality of electrochemical batteries, in particular metal-ion batteries, includes a self-supporting inflatable structure, the shape and dimensions of which when deployed are adapted to create a peripheral barrier, which is closed upon itself, around the electric vehicle; and a liquid supply device for filling, at least partially, the volume delimited inside the peripheral barrier, so as to immerse at least the module or battery pack in the liquid.

Abstract: A system for extinguishing a fire and/or preventing a fire from starting or restarting in an electric vehicle having a module or a battery pack with a plurality of electrochemical batteries, in particular metal-ion batteries, includes a self-supporting inflatable structure, the shape and dimensions of which when deployed are configured to lift the electric vehicle off the ground, create a liner between the ground and the electric vehicle, and create a peripheral barrier in continuity with the liner, which is closed upon itself, around the electric vehicle. The system also includes a liquid supply device for filling, at least partially, the sealed volume delimited inside the peripheral barrier and by the liner, so as to immerse at least the module or battery pack in the liquid.

Abstract: The invention relates to a method for determining the dimensions of an electrochemical cell allowing a total area of the electrochemical cell to be minimized while maximizing an electrical signal generated by the electrochemical cell in operation, including: a/ determining a first cost function expressing the variation in a first parameter representative of the total area as a function of an adjustment variable representative of an aspect ratio of the active zone; b/ determining a second cost function expressing the variation in a second parameter representative of the generated electrical signal as a function of the adjustment variable; c/ determining a compound cost function from the first and second cost functions and identifying a value of the adjustment variable that optimizes the compound cost function and that therefore conjointly optimizes the first and second cost functions.

Abstract: A device triggers thermal runaway of an electrochemical accumulator, including a flexible package that contains at least once electrochemical cell. A part of the current collectors that form the output terminals of the accumulator pass through the flexible package. The device includes two electrical current conducting elements, each respectively in electrical contact with the exterior of a part of a metal layer of the flexible package or of the metal housing, and an electrical power supply independent from the accumulator. The electrical power supply is designed to drive a current, referred to as a heating current, between the two elements so as to heat up the flexible package or the housing of the accumulator by Joule effect.

Abstract: The invention relates to a method for preparing a positive electrode for a lithium-sulfur battery, comprising the following steps: a) a step of preparing a first mixture by placing a carbon additive such as carbon black and/or activated carbon, a carbon additive chosen from carbon nanotubes, carbon fibres and the mixtures of the two, a carbon organic binder, and a solvent in contact; b) a step of carbonising said mixture, by means of which the result is a powder comprising agglomerates of carbon black and/or activated carbon and of carbon nanotubes and/or carbon fibres; c) a step of placing the powder obtained in b) in contact with sulfur thus forming a second mixture; d) a step of dispersing said second mixture in an organic binder; e) a step of depositing the dispersion thus obtained on a substrate; and f) a step of drying said dispersion thus deposited.

Abstract: A fuel cell including: a membrane/electrode assembly including a proton exchange membrane and including an anode in contact with the membrane, the membrane/electrode assembly including a first active zone covered by the anode, and a first linking zone not covered by the anode; flow guiding plates between which the membrane/electrode assembly is arranged, the flow guiding plates being traversed by at least one first flow collector in communication with the anode, the first linking zone arranged between the first flow collector and the first active zone. The membrane/electrode assembly further includes a first capacitive layer including a mixture of carbon including a BET specific surface area at least equal to 200 m2/g and of a proton-conducting material, arranged on the first linking zone.

Abstract: An electrochemical device includes at least one electrochemical cell, including a membrane electrode assembly and bipolar plates through which at least one discharge manifold passes, the membrane electrode assembly including an active zone and a connection zone; at least one hydrogen sensor including an anode positioned in the connection zone and including a catalyst suitable for ensuring the oxidation of the hydrogen, and a cathode opposite the anode; a voltage source; a current sensor; and a computing unit, suitable for detecting the presence of hydrogen from the measured value of the electric current.

Abstract: A method is provided for determining a spatial distribution (Rx,yf) of a parameter of interest (R) representative of the electrical power production of an electrochemical cell, including steps of determining the spatial distribution (Rx,yf) the parameter of interest (R) depending on a spatial distribution (Qx,ye) of a second thermal quantity (Qe) estimated beforehand from a spatial distribution (Tx,yc) of a set-point temperature (Tc) and from a spatial distribution (Dx,yr) of a first thermal quantity (Dr).

Abstract: A method for producing an electrochemical cell is provided, the method including determining a spatial distribution (kx,yf) of a parameter of interest (k) representative of a permeability of a diffusion layer of at least one electrode of a reference electrochemical cell in operation, the determining being performed by defining a spatial distribution (Tx,yc) of a set-point temperature (Tc) within the cell in operation, by measuring a spatial distribution (Dx,yr) of a first thermal quantity (Dr) representative of local removal of heat, by estimating a spatial distribution (Qx,ye) of a second thermal quantity (Qe) representative of local production of heat (Qe), and by determining the spatial distribution (kx/yf) depending on the estimated spatial distribution (Qx,ye), and the method further including producing the electrochemical cell based on the reference electrochemical cell and in which the parameter of interest (k) has the determined spatial distribution (kx,yf).

Abstract: A method for cutting an electrode of an electrochemical generator including a metal sheet with a laser beam of a power lower than or equal to 600 W, one face of the metal sheet being partially coated with a thinly layered band called the cutting band, the optical absorption factor of which for an emission wavelength of the laser beam is higher than or equal to 0.5 and preferably higher than or equal to 0.8, and extends so as to define a cutting path, in which the laser beam is focused on the cutting band and the laser beam is animated with a relative movement with respect to the electrode so as to travel the cutting path.

Abstract: The invention relates to a method for determining the dimensions of an electrochemical cell allowing a total area of the electrochemical cell to be minimized while maximizing an electrical signal generated by the electrochemical cell in operation, including: a/ determining a first cost function expressing the variation in a first parameter representative of the total area as a function of an adjustment variable representative of an aspect ratio of the active zone; b/ determining a second cost function expressing the variation in a second parameter representative of the generated electrical signal as a function of the adjustment variable; c/ determining a compound cost function from the first and second cost functions and identifying a value of the adjustment variable that optimizes the compound cost function and that therefore conjointly optimizes the first and second cost functions.

Abstract: A fuel cell including: a membrane/electrode assembly including a proton exchange membrane and including an anode in contact with the membrane, the membrane/electrode assembly including a first active zone covered by the anode, and a first linking zone not covered by the anode; flow guiding plates between which the membrane/electrode assembly is arranged, the flow guiding plates being traversed by at least one first flow collector in communication with the anode, the first linking zone arranged between the first flow collector and the first active zone. The membrane/electrode assembly further includes a first capacitive layer including a mixture of carbon including a BET specific surface area at least equal to 200 m2/g and of a proton-conducting material, arranged on the first linking zone.

Abstract: The invention relates to a fuel cell comprising a membrane/electrode assembly (14), that includes: a proton exchange membrane (2); an anode (31) which is in contact with a first surface of the membrane and which contains a mixture including a proton conducting polymer and platinum supported on carbon powder; said mixture further includes additional carbon which does not support any catalyst and which has a minimum specific surface area BET of 200 m2/g. The membrane/electrode assembly (14) has a first active region (21) that is covered by the anode (31), and a first joining region (22) that is not covered by the anode (31).

Abstract: A fuel cell, including: first and second electrochemical cells; a two-pole plate arranged between the first and second electrochemical cells, including a conductor support delimiting a first flow channel facing the first electrochemical cell and extending between an air inlet and a water outlet, and including a first conductive coating attached to the conductor support at the air inlet of the first flow channel and including a second conductive coating fastened to the conductor support at the middle part of the first flow channel, the second conductor coating having an electrical surface resistance greater than that of the first conductive coating.

Abstract: A process for preparing a structure acting both as a positive electrode for a lithium-sulfur battery and as a current collector, comprising the following operations: depositing one or more liquid compositions comprising the constituent ingredients of this structure on a removable substrate; drying the one or more deposited compositions; separating the removable substrate from the structure thus obtained, which forms the structure acting both as a positive electrode for a lithium-sulfur battery and as a current collector.

Abstract: A method of attachment between a metal collector and a carbon felt of a battery includes the steps of impregnation of the pores of the carbon felt with a mixture of metal powder and of a binder, locally performed in at least one predetermined area of the carbon felt; and spot welding between the metal collector and the carbon felt impregnated with the metal powder, performed at the level of said at least one predetermined area.