Abstract: The invention relates to a lithium vanadium oxide which corresponds to the formula Li1+?V3O8 (0.1???0.25). It is composed of agglomerates of small needles having a length l from 400 to 1000 nm, a width w such that 10<l/w<100 and a thickness t such that 10<l/t<100. It is obtained by a process consisting in preparing a precursor gel by bringing ?-V2O5 and a Li precursor into contact in amounts such that the ratio of the concentrations [V2O5]/[Li] is between 1.15 and 1.5 and in subjecting the gel to a heat treatment comprising a first stage at 80° C.-150° C. for 3 h to 15 days and a second stage between 250° C. and 350° C. for 4 min to 1 hour, under a nitrogen or argon atmosphere. It is useful as an active material of a positive electrode.

Abstract: The invention relates to a lithium battery, the operation of which is security-protected by the interposition of resilient films. The battery is made up of a battery cell PEN, which comprises a film of an electrolyte E containing a lithium salt between a film P forming a positive electrode and a film N forming a negative electrode, or made up of a stack of battery cells PEN, said stack comprising two terminal battery cells between which are optionally placed one or more intermediate battery cells, said battery being characterized in that it comprises at least two protective films Fp made of a resilient material, at least one of the electrodes of the battery cell or of each terminal battery cell being in contact with a protective film Fp made of a resilient material.

Abstract: The invention relates to a module including a housing (10) in which are provided at least two electric energy storage assemblies (20) connected by connection means (30) and at least one management electronic board (40) for managing the charging and discharging of the energy storage means (20), wherein the different walls of the housing (10) are in thermal contact while being electrically insulated, respectively, for at least one wall relative to the electric energy storage assemblies (20) and for at least another wall with the management electronic board (40), so as to promote the cooling of said module.

Abstract: The invention relates to a supercapacitor with a double electrochemical layer that comprises at least two complexes (2, 3) and at least one spacer (4) between the two complexes (2, 3), the complexes (2, 3) and the spacer (4) being spirally wound together in order to form a coiled member (10), characterized in that it further comprises at least another complex (1) and at least another spacer (4), the other complex (1) and the other spacer (4) being spirally wound together around the coiled member (10) in order to form at least one subsequent coiled member (20), the consecutive coiled members (10, 20) being separated by an electronic insulation space.

Abstract: The invention relates to a supercapacitor that comprises at least two juxtaposed complexes (1, 2) spaced by a distance d, and at least one common complex (3) located opposite the two juxtaposed complexes (1, 2) and spaced therefrom by at least one spacer (4), the spacer (4) and the complexes (1, 2, 3) being spirally wound together in order to form a coiled element.

Abstract: The invention relates to a method for making an electric energy storage assembly (1) including a cylindrical coil member (10) having a current collecting section at each end thereof, wherein the method comprises the step of radially coating at least one current collecting section at the end thereof from the center to the periphery of the end of the collecting section. The invention also relates to a device for implementing said method and to a storage assembly obtained by said method.

Abstract: The present invention relates to a device to prevent overpressure in a supercapacitor. In a supercapacitor comprising a closed chamber fitted with means for exchanging a gas with the external surroundings and in which there are positioned two electrodes with a high specific surface area, separated by a separator, the separator and the electrodes being impregnated with an electrolyte, the means for exchanging a gas comprise a metallic membrane that is permeable to hydrogen and its isotopes and impermeable to gaseous species which have an effective cross section of 0.3 nm or higher, at a temperature of between ?50° C. and 100° C.

Abstract: The invention relates to a bilayer polymer electrolyte for a lithium battery. The electrolyte comprises the layers N and P, each composed of a solid solution of an Li salt in a polymer material, the Li salt being the same in both layers, the polymer material content being at least 60% by weight, and the lithium salt content being from 5 to 25% by weight. The polymer material of the layer P contains a solvating polymer and a nonsolvating polymer, the weight ratio of the two polymers being such that the solvating polymer forms a continuous network. The polymer material of the layer N is composed of a solvating polymer and optionally a nonsolvating polymer, the weight ratio of the two polymers being such that the solvating polymer forms a continuous network, and the nonsolvating polymer does not form a continuous network.

Abstract: The invention relates to a bilayer polymer electrolyte for a lithium battery. The electrolyte comprises the layers N and P, each composed of a solid solution of an Li salt in a polymer material, the Li salt being the same in both layers, the polymer material content being at least 60% by weight, and the lithium salt content being from 5 to 25% by weight. The polymer material of the layer P contains a solvating polymer and a nonsolvating polymer, the weight ratio of the two polymers being such that the solvating polymer forms a continuous network. The polymer material of the layer N is composed of a solvating polymer and optionally a nonsolvating polymer, the weight ratio of the two polymers being such that the solvating polymer forms a continuous network, and the nonsolvating polymer does not form a continuous network.

Abstract: The invention relates to a lithium vanadium oxide which corresponds to the formula Li1+?V3O8 (0.1???0.25). It is composed of agglomerates of small needles having a length l from 400 to 1000 nm, a width w such that 10<l/w<100 and a thickness t such that 10<l/t<100. It is obtained by a process consisting in preparing a precursor gel by bringing ?-V2O5 and a Li precursor into contact in amounts such that the ratio of the concentrations [V2O5]/[Li] is between 1.15 and 1.5 and in subjecting the gel to a heat treatment comprising a first stage at 80° C.-150° C. for 3 h to 15 days and a second stage between 250° C. and 350° C. for 4 min to 1 hour, under a nitrogen or argon atmosphere. It is useful as an active material of a positive electrode.

Abstract: The invention relates to a lithium vanadium oxide which corresponds to the formula Li1+?V3O8 (0.1???0.25). It is composed of agglomerates of small needles having a length l from 400 to 1000 nm, a width w such that 10<l/w<100 and a thickness t such that 10<l/t<100. It is obtained by a process consisting in preparing a precursor gel by bringing ?-V2O5 and a Li precursor into contact in amounts such that the ratio of the concentrations [V2O5]/[Li] is between 1.15 and 1.5 and in subjecting the gel to a heat treatment comprising a first stage at 80° C.-150° C. for 3 h to 15 days and a second stage between 250° C. and 350° C. for 4 min to 1 hour, under a nitrogen or argon atmosphere. It is useful as an active material of a positive electrode.

Abstract: The invention concerns an interconnection system (100) of an energy storage assembly (200), with an electronic support for controlling (300) the health status of the energy storage assembly (200), the interconnection system (101) being characterized in that it comprises an interconnection support (101) including a conductive circuit (800) formed on electrically conductive surface, said circuit (800) forming an electrical connection between the electronic control support (300) and the pole terminals (500) of the cells to which it is connected, respectively, through connecting means and through retaining means (110, 120, 150), said retaining means (110, 120, 150) being adapted to urged into contact, on the pole terminals (500), with support means (510) so as to arrange the pole terminals (500) on the interconnection support (101) and adapted to provide a direct electrical connection of the pole terminals (500) with the conductive circuit (800).

Abstract: The invention relates to a bilayer polymer electrolyte for a lithium battery. The electrolyte comprises the layers N and P, each composed of a solid solution of an Li salt in a polymer material, the Li salt being the same in both layers, the polymer material content being at least 60% by weight, and the lithium salt content being from 5 to 25% by weight. The polymer material of the layer P contains a solvating polymer and a nonsolvating polymer, the weight ratio of the two polymers being such that the solvating polymer forms a continuous network. The polymer material of the layer N is composed of a solvating polymer and optionally a nonsolvating polymer, the weight ratio of the two polymers being such that the solvating polymer forms a continuous network, and the nonsolvating polymer does not form a continuous network.

Abstract: The invention concerns a device for storing electric power and method for assembling the device. The device includes an electrode layer and a collector layer associated with the electrode layer, a barrier layer made of metal nitride, the barrier layer being interposed between the electrode layer and the collector layer. The barrier layer is adapted to prevent diffusion of ions contained in an electrolyte up to the collector layer.

Abstract: The invention relates to a copolymer of ethylene oxide or propylene oxide and at least one substituted oxirane bearing an ionic group. The copolymer is characterized in that its chain comprises repeat units —O—CH2—CH(—CH2—O—SO3?Li+)—, repeat units —O—CH2—CHR— in which R is H or CH3, optionally, repeat units —O—CH2—CH(—CH2R?)— in which R? is a functional group. x Uses: electrolyte in electrochemical, selective-membrane and reference-membrane devices.

Abstract: The invention concerns a method for making a porous substrate-electrode complex (6) with load rate not less than 80% for a supercapacitor including at least the following steps: preparing a mixture containing at least one polymer (1), at least one liquid pore-forming plasticizer (3), and at least one active filler (2); extruding the mixture in paste form; depositing the paste on the substrate and laminating same; and treating the resulting complex to eliminate all or part of the plasticizer (3) and generate porosity in the electrode. The invention also concerns an electrode paste and a collector-electrode complex.

Abstract: The application relates to a battery including a pack of modules, each containing rechargeable cells in series, the battery including means for measuring the voltage and/or the temperature of at least one module. According to the application, the battery includes means for computing, based on the voltage and/or temperature measured by the measuring means and on a recorded characteristic of the discharge current and/or regeneration current of the battery, a maximum discharge and/or regeneration current limit of the pack. The battery also includes a transmission means for transmitting to the outside the information on the maximum discharge and/or regeneration current limit of the pack.

Abstract: The application concerns a battery module, comprising cells, two external terminals, a message communication infrastructure, a module control unit comprising a message processing unit, connected to the infrastructure to send and receive messages. According to the application, at least two of the message systems chosen from among: a first message system for cell characterization, a second message system for cell forming, and a third message system for utilization of a battery pack comprising several modules connected via their user terminals, when the pack is associated with a consumer machine for the purpose of supplying it with electric energy, are provided in the message processing unit, which is able to be configured into any one of the message systems.

Abstract: The application relates to a power battery module, including rechargeable cells having a nominal operating charging temperature, greater than 20° C. According to the application, the module includes a circuit for managing charging of the cells which further includes: two external charging terminals for charging of the cells, wherein at least one, called second charging terminal, of the two external charging terminals is distinct from the external use terminals, first interruption/connector between the second charging terminal and one of the use terminals, second device between the charging terminals and the heating element to connect, at least in the first interruption position, the charging terminals to a heating element of the cells.

Abstract: An electric power storage cell including several electrochemical elements connected in series and/or in parallel, arranged inside a sealed casing. The casing electrically connects the electrochemical elements to a power connecting device outside the casing. The electrical connection is configured so that the casing can be traversed without affecting adversely the tightness thereof and without transmitting stresses to the casing. The storage cell has applications in the field of lithium polymer technologies with high power storage assemblies.