Abstract: A disconnection device, in particular for disconnecting two electrically connected electrochemical elements. The present invention also relates to a device for short-circuiting two electrodes of opposite polarity in an electrochemical element. The subject matter of the invention includes an assembly comprising: ? a) a connecting part (3) and ? b) a disconnection device (4), the disconnection device being intended to disconnect two electrochemical elements (1, 2) connected by the connecting part (3), the disconnection device (4) comprising: ? i) microparticles (5) capable of expanding when their temperature reaches a threshold value, the threshold value being below 150° C., ? ii) a capsule (4a, 4b) enclosing all of the microparticles (5), the capsule (4a, 4b) being arranged such that when the temperature of the microparticles (5) reaches the threshold value, the expansion of the microparticles disconnects the connection between the two electrochemical elements (1, 2).

Abstract: The invention relates to an electrochemical element and a battery comprising one or more electrochemical elements, with integrated sensors and/or actuators, in particular including an application for monitoring the operation of an electrochemical element or a Li-ion battery, and/or triggering actions in such an element or such a battery, intended to secure the element or the battery. The electrochemical element (1) comprises a closed shell (2) defining an internal volume and a beam (3) arranged therein having alternating positive and negative electrodes respectively connected to two positive and negative electrical output terminals housing separators, the beam (3) being impregnated with electrolyte and further connected by connection means (4) to one (5) of the electrical output terminals.

Abstract: This electrochemical element for a battery, comprising a first electrode of a first polarity, a first terminal of the first polarity, a second electrode of a second polarity, a second terminal of the second polarity, and a casing comprising a first wall and a second wall. The first wall and the second wall each comprise a base body of metal and an electrically insulating layer. The electrically insulating layer comprises either a plastic coating or a layer resulting from a surface treatment. Each of the base bodies comprises a base body edge. The edges of the base bodies are joined by a weld bead to form the casing. At the location of the weld bead, the base bodies are free of the electrically insulating layer.

Abstract: The invention concerns an electrochemical element and the method for manufacturing same, as well as a battery comprising one or more electrochemical elements, for application in particular in the field of electrochemical elements or Li-ion batteries. The electrochemical element comprises a closed shell (1) defining an internal volume inside which a bundle (2) is arranged, having alternating positive and negative electrodes (3) respectively connected to two positive and negative electrical output terminals and housing separators, the bundle (2) being impregnated with electrolyte. The shell (1) comprises a bottom wall (4) having an internal bottom face (4a), oriented towards the internal volume, and at least one side wall (5, 6) having an internal side face (5a, 6a), oriented towards the internal volume. The internal side face (5a, 6a) joins the internal bottom face (4a) by substantially forming an internal angle (a).

Abstract: The invention relates to an electrochemical element (1) comprising: a) a container (2) comprising an opening allowing the introduction of at least one electrochemical beam (7); and b) a closing part (3) for closing said container, comprising: i) at least one flat inner surface (4a, 4b, 4c) which is oriented towards the inside of the container and can be directly electrically connected to a current collector (6), ii) at least one flat outer surface (5a, 5b, 5c) which is oriented towards the outside of the container and can act as a terminal of the electrochemical element, and iii) at least one wall (8a, 8b, 8c) connecting said at least one flat inner surface to said at least one flat outer surface, said wall forming an angle of between 70 and 120° in relation to one of the two flat surfaces. The closing part of the container allows heat dissipation to be improved in the direction of the longitudinal axis of the element.

Abstract: The invention relates to an electrochemical element (1) comprising: a) a container (2) comprising an opening allowing the introduction of at least one electrochemical beam (7); and b) a closing part (3) for closing said container, comprising: i) at least one flat inner surface (4a, 4b, 4c) which is oriented towards the inside of the container and can be directly electrically connected to a current collector (6), ii) at least one flat outer surface (5a, 5b, 5c) which is oriented towards the outside of the container and can act as a terminal of the electrochemical element, and iii) at least one wall (8a, 8b, 8c) connecting said at least one flat inner surface to said at least one flat outer surface, said wall forming an angle of between 70 and 120° in relation to one of the two flat surfaces. The closing part of the container allows heat dissipation to be improved in the direction of the longitudinal axis of the element.

Abstract: The invention relates to an electrochemical element and a battery comprising one or more electrochemical elements, with integrated sensors and/or actuators, in particular including an application for monitoring the operation of an electrochemical element or a Li-ion battery, and/or triggering actions in such an element or such a battery, intended to secure the element or the battery. The electrochemical element (1) comprises a closed shell (2) defining an internal volume and a beam (3) arranged therein having alternating positive and negative electrodes respectively connected to two positive and negative electrical output terminals housing separators, the beam (3) being impregnated with electrolyte and further connected by connection means (4) to one (5) of the electrical output terminals.

Abstract: A Lithium-Ion monoblock battery assembly including a housing having a cavity for receiving an electrode assembly. Also including a cover sealingly attached to the housing, and a bussing integrally molded with at least one of the housing and the cover.

Abstract: An electromechanical element (1) comprising: a recipient (2) including an aperture allowing at least one set of plates (4) to be inserted; and a cover (3) intended to be assembled on the aperture of the recipient, comprising: i) a first wall (17) including at least one aperture for the passage of a current output terminal (6), this first wall making an angle ranging front 80 to 10° to the horizontal, ii) a second wall (19) making an angle ranging from 5° to 85° to the horizontal, the zone of contact between the recipient and the cover defining a plane of closure (16) of the element, which plane of closure makes an angle ranging from 5° to 85° to the horizontal. The design of the recipient and of the cover allows a plurality of electrochemical elements to be stacked to form a battery (10).

Abstract: The invention relates to a battery, in particular a lithium-ion type battery. The battery comprises a container (1) containing an electrochemical bundle with alternating positive and negative electrodes (2) framing electrolyte-impregnated separators, and at least one current output terminal (3, 4) forming a cover (3, 4) for closing the container (1). The edges (5, 6) of the electrodes (2) having one of the polarities are directly connected to the cover (3, 4) by welding.

Abstract: A Lithium-Ion monoblock battery assembly including a housing having a cavity for receiving an electrode assembly. Also including a cover sealingly attached to the housing, and a bussing integrally molded with at least one of the housing and the cover.

Abstract: A Lithium-Ion monoblock battery assembly including a housing having a cavity for receiving an electrode assembly. Also including a cover sealingly attached to the housing, and a bussing integrally molded with at least one of the housing and the cover.

Abstract: A method for connecting electrodes of the same polarity of an accumulator (1) to a current output terminal (6, 7), the accumulator including two current output terminals (6, 7), a container (2) containing an electrochemical bundle (9) having alternating positive and negative electrodes, the ends of the current collectors of the positive and negative electrodes defining a first (Si) and second (S2) surface respectively. There is a step of additive manufacturing of an internal connecting part (11, 13) electrically connecting the first and/or the second surface to the corresponding current output terminal.

Abstract: A method for connecting electrodes of the same polarity of an accumulator (1) to a current output terminal (6, 7), the accumulator including two current output terminals (6, 7), a container (2) containing an electrochemical bundle (9) having alternating positive and negative electrodes, the ends of the current collectors of the positive and negative electrodes defining a first (Si) and second (S2) surface respectively. There is a step of additive manufacturing of an internal connecting part (11, 13) electrically connecting the first and/or the second surface to the corresponding current output terminal.

Abstract: A container for a sealed secondary cell containing an electrode plate group is provided comprising a wall forming a base (2) in electrically conducting material, the base comprising a peripheral portion (2a), a closure member portion (2b) and a weakened portion (2c) joining the peripheral portion (2a) to the closure member portion and designed to rupture in the presence of an excess pressure inside the container. An electrically insulating ring member (4) is mounted on the peripheral portion to support the electrode plate group, and the container includes an electrically conducting flexible connection part (3), electrically connected to the closure member portion (2b) and to the electrode plate group, in which, in the presence of an excess pressure leading to rupturing of the weakened portion, the connection part guides the closure member portion to a position after rupture which is substantially parallel to its position prior to rupture.

Abstract: A sealed accumulator container (2) intended to contain an electrochemical bundle (9), the container comprising a wall forming a bottom (3) in an electrically conducting material comprising: a peripheral portion (3a), a cap (3c), an embrittled portion (3b) delimiting the cap, joining the peripheral portion to the cap, adapted so as to break upon overpressure inside the container, in which container is positioned an electrically conducting deformable membrane (10) electrically connecting electrodes of same polarity of an electrochemical bundle to the cap, and in which container, overpressure causes deformation of the membrane, this deformation causing failure of the embrittled portion.

Abstract: A Lithium-Ion monoblock battery assembly including a housing having a cavity for receiving an electrode assembly. Also including a cover sealingly attached to the housing, and a bussing integrally molded with at least one of the housing and the cover.

Abstract: A safety device for a sealed cell (1) comprising alternating positive and negative electrodes respectively connected to positive and negative current output terminals (6, 7) placed in a container (2) having an end (3) that is closed by a wall. The wall of the closed end presents thinning (13) adapted to be torn by excess pressure inside the container, and the thinning is adapted, on being torn, to interrupt electrical conduction between the electrodes of one polarity and the corresponding current output terminal. The device of the invention is simple in design, is capable of operating at low pressures, and over a wide range of pressures, and acts as a circuit interrupter without decreasing the current density that flows in the electrical circuit.

Abstract: A sealed accumulator container (2) intended to contain an electrochemical bundle (9), the container comprising a wall forming a bottom (3) in an electrically conducting material comprising: a peripheral portion (3a), a cap (3c), an embrittled portion (3b) delimiting the cap, joining the peripheral portion to the cap, adapted so as to break upon overpressure inside the container, in which container is positioned an electrically conducting deformable membrane (10) electrically connecting electrodes of same polarity of an electrochemical bundle to the cap, and in which container, overpressure causes deformation of the membrane, this deformation causing failure of the embrittled portion.

Abstract: The invention relates to a safety device for a watertight electro-chemical accumulator (1), comprising a circuit breaker (13) which is actuated by an overpressure inside a container (2) of the accumulator, and a gas generator (20) which is activated when the temperature in the generator exceeds a predetermined threshold value. The safety device can be used for quickly interrupting the current flow through the accumulator in case of malfunction and before electrolyte vapors are generated.