Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Commissariat a L'energie Atomique

Marianne Chami

Sébastien Martinet

Lionel Picard

Jean-Francois Damlencourt

Sébastien Patoux

Celine Barchasz

Frédéric Dewulf

Sebastien Patoux

Pierre Jost

Yvan Reynier

Djamel Mourzagh

Céline Barchasz

Olivier Masson

Come-Emmanuel Leys

Séverine Jouanneau-Si Larbi

Ludovic Rouillon

Jean-François Damlencourt

Jérémie Salomon

Côme-Emmanuel Leys

Florence Masse

The present patent application relates to a device for a lithium electrochemical generator, said device comprising a band () of electrical insulating material including at least one polymer, and at least one metallic layer () 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 (C) of the band comprises a plurality of holes () 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 (P) is devoid of metallic layer and at least one metallic layer is covered with an electrode of lithium insertion material.

Current collector with integrated leak-proofing means, bipolar battery comprising such a collector

The present invention relates to a metal-ion accumulator (A), comprising a stack of elementary electrochemical cells, each comprising a cathode (), an anode (), and a separator () impregnated with electrolyte intercalated between the anode and the cathode, each anode and cathode consisting of a substrate (S,S) formed from a metal foil comprising a central portion () supporting, on at least one of its main faces, a layer of active metal ion insertion material, the porosity of the layers of active material of the electrodes of one of the given polarities (anode or cathode) having at least two different values in the stack, the highest porosity being that of at least one electrode of said polarity, arranged between the center and the ends of the stack.

High-capacity stacked-electrode metal-ion accumulator capable of delivering high power

The invention relates to a device for a lithium electrochemical generator, having an elongate shape along a longitudinal axis (X), comprising a strip comprising a current collector central portion that is at least partially electrically conductive, in which at least one of the two main surfaces is covered with an electrode consisting of a lithium insertion material, and at least two side peripheral portions connected to the central portion and extending transversely to the longitudinal axis, the side peripheral portions being made of an electrically insulating material comprising at least one polymer, the insulating material of at least one of the two side portions being resiliently or plastically deformable, the dimensions of the latter also being determined such as to allow the deformation thereof without breaking during the winding of the strip about a winding axis, which is transverse to the axis (X) and adjacent to the other one of the two side peripheral portions. The invention relates to the method for manufacturing a related bipolar battery.

Current collector having a built-in sealing means, bipolar battery including such a collector, method for manufacturing such a battery

The present invention relates to a lithium-ion electrochemical accumulator comprising an electrode assembly, a casing arranged to sealably contain the electrode assembly, two current output terminals each connected to one or other of the anode(s) and cathode(s) of the assembly, one of the terminals, called the first terminal, passing through a wall of the casing and being electrically insulated therefrom. According to the invention, the first terminal comprises a first conductive part passing through the casing and comprising a portion at least one region of which is welded directly to the bottom.

Lithium electrochemical accumulator having a terminal directly connected to the electrochemical assembly and associated production methods

An electrochemical accumulator including: at least one electrochemical cell made of at least one cathode and one anode and, on either side of an electrolyte, two current collectors, one of which is connected to the anode and the other to the cathode; a housing made of aluminium alloy arranged such as to sealingly contain the electrochemical cell(s); two current-output terminals, one of which is welded to a wall of the housing, the output terminal welded to the housing being made of an aluminium alloy having a magnesium content (Mg) that is no lower than 0.01% and no higher than 4%, and a copper content that is no lower than 0.05% and no higher than 0.3%, the aluminium alloy of the output terminal welded to the housing having a metallurgical state which grants same a breaking strength (Rm) of no less than 60 MPa.

Electrochemical accumulator with housing and output terminal made of aluminium alloy

A lithium electrochemical storage battery including: at least one electrochemical cell; two current collectors, one of which is connected to the anode and the other to the cathode; and a casing of longitudinal axis X, the casing including a cap, a bottom, a lateral jacket joined both to the bottom and to the cap, and a central core arranged along the axis X, the central core being hollow at least over some of its height and made of a material the melting point of which is higher than the temperature reached by the cell when it malfunctions, the hollow portion of the central core opening onto the exterior of casing via the bottom and/or the cap and the central core having, at least one end of its hollow portion, an internal thread into which an external thread of a part forming one pole of the storage battery may be screwed.

Lithium electrochemical storage battery having a casing providing improved thermal dissipation, associated battery pack and production processes

This current collector for a lithium electrochemical accumulator includes an electronically-insulating viscoelastic foam associated with an electroconductive polymer film.

Current collector for a lithium battery

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.

Electrochemical lithium accumulator with a bipolar architecture comprising a specific electrolyte additive

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 alia in that said current-collecting substrate is in copper or in copper alloy.

Lithium electrochemical accumulator having a specific bipolar architecture

A bipolar lithium-ion electrochemical battery having increased capacity.

Bipolar electrochemical Li-ion battery having increased capacity

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.

Current collector having built-in sealing means, and bipolar battery including such a collector

A lithium-ion storage battery includes LiFePOas 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.

High-power lithium-ion storage battery

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.

Lithium electrochemical accumulator with a bipolar architecture operating on the basis of a pair of lithiated sulfur compound electrodes

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.

Growing community of inventors

Fontaine, France

Marianne Chami