Abstract: The invention relates to a feed-through comprising a terminal for a metal-ion electrochemical accumulator, produced through an orifice emerging either side of a wall comprising two opposite faces, comprising: a closure means in abutment against the chamfer of at least one through passage forming a seat inside the feed-through; a compression means housed in the through duct, the compression means being adapted to keep the closure means pressed against its seat along a continuous peripheral surface, up to a predetermined pressure of the gases prevailing inside the accumulator, beyond which pressure said gases may escape towards the outside of the accumulator through the passage and the through duct.

Abstract: A feedthrough that forms a terminal for a metal-ion electrochemical accumulator, provided through an aperture opening out on either side of a wall including two opposite faces. The includes feedthrough an electrically conductive male part, and a female part made of an aluminum-based alloy. A portion of the male part is tight-fitted into a blind hole of the female part.

Abstract: The present invention relates to a metal-ion accumulator (A), comprising a stack of elementary electrochemical cells, each comprising a cathode (2), an anode (3), and a separator (1) impregnated with electrolyte intercalated between the anode and the cathode, each anode and cathode consisting of a substrate (2S, 3S) formed from a metal foil comprising a central portion (22, 32) 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.

Abstract: The present invention relates to an electrode (2, 3) for an electrochemical bundle of a metal-ion storage battery or of a supercapacitor, comprising a substrate (2S, 3S) formed from a metal strip that supports an active metal-ion insertion material (2I, 3I) in its central portion (22, 32), while its lateral band, referred to as the edge (20, 30), is devoid of active insertion material, the lateral band comprising an end area (21, 31), in which the properties of the metal material and/or geometry of which is/are modified in relation to the rest of the strip in the edge (20, 30) and in the central portion (22, 32), so as to cause localized plastic buckling in the end area when a predetermined compressive force (E) is applied to the end area, the central portion not deforming under the predetermined compressive force.

Abstract: A feedthrough that forms a terminal for a metal-ion electrochemical accumulator, provided through an aperture opening out on either side of a wall including two opposite faces. The includes feedthrough an electrically conductive male part, and a female part made of an aluminum-based alloy. A portion of the male part is tight-fitted into a blind hole of the female part.

Abstract: 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.

Abstract: The present invention relates to a bushing forming a terminal for a storage battery, made through an opening connecting to either side of a wall comprising two opposing surfaces, which comprises: two electrically insulating washers, each comprising a bearing portion resting by the surface thereof under pressure against one of the surfaces of the wall and a guiding portion projecting from the bearing portion and resting under pressure against the edge of the opening; two electrically conductive parts, in which a male part is adjusted clamped inside the female part, each one of the parts comprising a bearing portion resting by the surface thereof under pressure against a bearing portion of the washers, the female part resting by the surface thereof under pressure against the guiding portions of the washers. The material(s) of the parts is/are fitted, and the section(s) thereof is/are sized so as to enable the flow of an electric current with a value of no less than 100 A.

Abstract: The invention relates to a feed-through comprising a terminal for a metal-ion electrochemical accumulator, produced through an orifice emerging either side of a wall comprising two opposite faces, comprising: a closure means in abutment against the chamfer of at least one through passage forming a seat inside the feed-through; a compression means housed in the through duct, the compression means being adapted to keep the closure means pressed against its seat along a continuous peripheral surface, up to a predetermined pressure of the gases prevailing inside the accumulator, beyond which pressure said gases may escape towards the outside of the accumulator through the passage and the through duct.

Abstract: 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.

Abstract: The present invention relates to an electrochemical storage battery (A) containing lithium, comprising an electrochemical bundle (F), two current collectors, one of which is connected to the bundle anode and the other to the bundle cathode, and a housing (6) elongated along a central axis (X) and having a lid (9), a bottom (8) and a side casing (7) joined to both the bottom and the lid, the housing being designed to receive the bundle in a sealed manner, and some of the current collectors forming the poles (40, 50) extending through the housing. According to the invention, a circuit-breaker device is provided, which has a housing bottom wall that deforms in the plastic deformation range, as well as a rated breaking line provided around the central portion of the collector, which can tear in order to electrically separate said central portion, connected to the bottom, from the main external surface of the current collector, which is connected to one end of the electrochemical bundle.

Abstract: The present disclosure relates to a lithium-based electrochemical storage battery, comprising an electrochemical bundle, two current collectors, one of which is connected to the bundle anode and the other to the bundle cathode, a housing elongated along a central axis and having a lid, a bottom and a side casing joined to both the bottom and the lid, the housing being designed to receive the bundle in a sealed manner, and some of the current collectors forming the poles extending through the housing. According to the disclosure, a circuit-breaker device is provided which has a housing bottom wall that deforms in the plastic deformation range, as well as welding lines between the collector and an electrochemical bundle end, which tear.

Abstract: The invention relates to a lithium-ion electrochemical accumulator—or Li-ion battery—having improved leak tightness of the liquid electrolyte contained therein. The architecture of the accumulator may be monopolar or bipolar. According to the invention, the sealing of the liquid electrolyte contained in the accumulator is improved through the presence of a leak-tight device or a plurality of leak-tight devices comprising a polymer that, in contact with the liquid electrolyte, converts to a gel in which the electrolyte is trapped and immobilised. Applications: any field in which Li-ion batteries of monopolar or bipolar architecture are likely to be used, and in particular in the manufacture of electric or hybrid vehicles and portable electronic devices (telephones, touchpads, computers, cameras, camcorders, etc).

Abstract: The present invention relates to a metal-ion accumulator (A), comprising a stack of elementary electrochemical cells, each comprising a cathode (2), an anode (3), and a separator (1) impregnated with electrolyte intercalated between the anode and the cathode, each anode and cathode consisting of a substrate (2S, 3S) formed from a metal foil comprising a central portion (22, 32) 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.

Abstract: A method for producing an electrochemical bundle of a lithium battery, such as an Li-ion battery, with a view to electrically connecting same to the output terminals of the battery, wherein it includes the combination of two steps of folding an electrochemical bundle of a lithium battery which are carried out separately, i.e. a radial folding with plastic deformation and an axial compacting, which make it possible to obtain two separate areas on at least one, and preferably both, of the lateral ends of the bundle. The invention also concerns a method for producing an electrical connection part between the electrochemical bundle and one of the output terminals of the battery, and an associated current collector.

Abstract: 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.

Abstract: 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.

Abstract: A method for producing an electrochemical bundle of a lithium battery, such as an Li-ion battery, with a view to electrically connecting same to the output terminals of the battery, wherein it includes the combination of two steps of folding an electrochemical bundle of a lithium battery which are carried out separately, i.e. a radial folding with plastic deformation and an axial compacting, which make it possible to obtain two separate areas on at least one, and preferably both, of the lateral ends of the bundle. The invention also concerns a method for producing an electrical connection part between the electrochemical bundle and one of the output terminals of the battery, and an associated current collector.

Abstract: The present invention relates to a bushing forming a terminal for a storage battery, made through an opening connecting to either side of a wall comprising two opposing surfaces, which comprises: two electrically insulating washers, each comprising a bearing portion resting by the surface thereof under pressure against one of the surfaces of the wall and a guiding portion projecting from the bearing portion and resting under pressure against the edge of the opening; two electrically conductive parts, in which a male part is adjusted clamped inside the female part, each one of the parts comprising a bearing portion resting by the surface thereof under pressure against a bearing portion of the washers, the female part resting by the surface thereof under pressure against the guiding portions of the washers. The material(s) of the parts is/are fitted, and the section(s) thereof is/are sized so as to enable the flow of an electric current with a value of no less than 100 A.

Abstract: A sealed accumulator (1) having an electrochemical bundle (9) including at least one positive electrode and one negative electrode arranged in a container (2); positive (6) and negative (7) current output terminals arranged on a cover (5) of the container and respectively connected to the positive and negative electrodes; a circuit-breaker including a connecting piece (10) and a membrane (20), electrically insulated from the connecting piece and suitable for deforming under the effect of an overpressure in the container, to break the connecting piece. The connecting piece extends over the top of the cover of the container and conducts an electric current between an electrode of one polarity and its current output terminal. The connecting piece is dimensioned to allow the passage of a current greater than 50 A.

Abstract: A sealed accumulator (1) comprises an electrochemical bundle (9) comprising at least one positive electrode and one negative electrode arranged in a container (2); positive (6) and negative (7) current output terminals arranged on a cover (5) of the container and respectively connected to the positive and negative electrodes; a circuit-breaker comprising a connecting piece (10) and a membrane (20), electrically insulated from the connecting piece and suitable for deforming under the effect of an overpressure in the container, to break the connecting piece. The connecting piece extends over the top of the cover of the container and conducts an electric current between an electrode of one polarity and its current output terminal. The connecting piece is dimensioned to allow the passage of a current greater than 50 A.