Abstract: The invention relates to an electrochemical lithium accumulator comprising at least one first electrochemical cell and at least one electrochemical cell separated from each other by a current collector substrate, which substrate supports on a first face an electrode of said first electrochemical cell and on a second face opposite to said first face, an electrode of opposite sign of said second electrochemical cell, each cell comprising a positive electrode and a negative electrode separated by an electrolyte, characterized in that the positive electrode comprises a lithiated compound and the negative electrode comprises elemental sulfur.

Abstract: The present patent application relates to a device for a lithium electrochemical generator, said device comprising a band (100) of electrical insulating material including at least one polymer, and at least one metallic layer (102) which forms a current collector and is deposited on at least one of the two main faces in the central part of the band. The central part (100C) of the band comprises a plurality of holes (101) emerging on its two opposite main faces, said holes being filled at least partially with a metal that is continuous with each deposited metallic layer. The periphery of the band (100P) is devoid of metallic layer and at least one metallic layer is covered with an electrode of lithium insertion material.

Abstract: A method for evaluating sealing of a bipolar structure including a sheet-like substrate forming a current collector, and two electrodes in a form of films arranged on opposite surfaces of the substrate, respectively, the method including: placing the bipolar structure in a cavity to define first and second compartments therein, which are separated by the bipolar structure, a periphery of which is sealingly connected to the cavity; circulating a fluid in the first compartment of the cavity toward the second compartment; and evaluating sealing of the bipolar structure from a measurement of difference in pressure of the fluid in the first and second compartments.

Abstract: A lithium-ion storage battery includes LiFePO4 as an active material for a positive electrode, an active material for a negative electrode having a lithium insertion/extraction potential equal to or greater than 0.5 V vs. Li+/Li, and a separating element placed between the positive and negative electrodes. The active material for the negative electrode is a lithiated titanium oxide, a derivative of a lithiated titanium oxide, a non lithiated titanium oxide, a derivative of a non lithiated titanium oxide or a mixture thereof. The separating element is formed from a non-woven fabric comprising cellulose fibers or glass fibers of nanometric and/or micrometric size.

Abstract: A bipolar lithium-ion electrochemical battery having increased capacity.

Abstract: The invention relates to an electrochemical lithium accumulator comprising at least one first electrochemical cell and at least one electrochemical cell separated from each other by a current collector substrate, which substrate supports on a first face an electrode of said first electrochemical cell and on a second face opposite to said first face, an electrode of opposite sign of said second electrochemical cell, each cell comprising a positive electrode and a negative electrode separated by an electrolyte, characterized in that the positive electrode comprises a lithiated compound and the negative electrode comprises elemental sulfur.

Abstract: A casing for a lithium bipolar electrochemical battery including a bipolar element. The casing includes a composite material including a matrix and at least one porous reinforcement, the matrix of which includes at least one hardened polymer impregnating the at least one porous reinforcement, wherein the at least one porous reinforcement and the at least one hardened polymer encase the bipolar element and maintain a determined pressure on either side of the bipolar element to maintain a determined contact between its constituents.

Abstract: Double pole battery comprising three electrochemical cells stacked along a longitudinal axis, each cell consisting of an anode, a cathode and an electrolyte placed between the anode and the cathode, a current collector plate electrically connecting an anode of a cell and a cathode of an adjacent cell, a current collector plate on the anode of a cell located at a first longitudinal end of the stack, a current collector plate on the cathode located at a second longitudinal end of the stack, an electrolyte-proof lateral wall surrounding each cell between each pair of successive collector plates, wherein the lateral walls of two adjacent cells are offset transversely one relative to the other relative to the longitudinal axis, in such a way they are not superposed one on the other.

Abstract: The invention relates to an electrochemical lithium accumulator comprising a stack of at least two electrochemical cells, each cell being separated from its adjacent cell by a current-collecting substrate, a first face of this substrate being occupied by an electrode of a cell while a second substrate face opposite to the first is occupied by an electrode of its adjacent cell, each cell comprising a positive electrode and a negative electrode separated by an electrolyte, characterized in that the electrolyte comprises a lithium polysulfide additive.

Abstract: The invention relates to an electrochemical lithium accumulator comprising at least one first electrochemical cell and at least one second electrochemical cell separated from each other by a current-collecting substrate, which substrate supports on a first face, an electrode of said first electrochemical cell, and on its second face opposite to said first face, an electrode of opposite sign of said second electrochemical cell, each cell comprising a positive electrode and a negative electrode separated by an electrolyte, characterized inter alio in that said current-collecting substrate is in copper or in copper alloy.

Abstract: In lithium bipolar batteries, to improve sealing against electrolytes between adjacent electrochemical cells, mixed current collector-electrode supports are produced, in a form of a metal grate or raised metal sheet housed in a strip made of electrical insulator material, the function of the periphery of which is to constitute a sealing area.

Abstract: A Lithium-ion storage battery includes: LiFePO4 as active material for a positive electrode, an active material for a negative electrode having a lithium insertion/extraction potential equal to or greater than 0.5 V vs. Li+/Li, chosen from a lithiated titanium oxide, a derivative of a lithiated titanium oxide, a non lithiated titanium oxide, a derivative of a non lithiated titanium oxide and a mixture thereof, and a separating element placed between the positive and negative electrodes, formed from a non-woven fabric containing fibers of nanometric and/or micrometric size, chosen from cellulose fibers and glass fibers.

Abstract: Double pole battery comprising three electrochemical cells stacked along a longitudinal axis, each cell consisting of an anode, a cathode and an electrolyte placed between the anode and the cathode, a current collector plate electrically connecting an anode of a cell and a cathode of an adjacent cell, a current collector plate on the anode of a cell located at a first longitudinal end of the stack, a current collector plate on the cathode located at a second longitudinal end of the stack, an electrolyte-proof lateral wall surrounding each cell between each pair of successive collector plates, wherein the lateral walls of two adjacent cells are offset transversely one relative to the other relative to the longitudinal axis, in such a way they are not superposed one on the other.