Saft

Saft Groupe Sa

Gerard Rigobert

Olivier Masson

Michael C Duffield

Daniel E Kelley

Alexandre Beugnon

Patrick Bernard

Thierry Berlureau

Alexandre Narbonne

Dominique Ligeois

Philippe Borel

Claude Gilabert

Luc Mermillod-Blondin

Christian Vezat

Laure Le-Guenne

Jonac Philippe

Matthieu Leyko

Thomas Pouget

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 () comprises a closed shell () defining an internal volume and a beam () arranged therein having alternating positive and negative electrodes respectively connected to two positive and negative electrical output terminals housing separators, the beam () being impregnated with electrolyte and further connected by connection means () to one () of the electrical output terminals. It further comprises one or mote self-powered sensor and/or actuator elements (to) each arranged in contact with one component selected from the shell (), the beam (), the connection means (), and the output terminal (), and capable of measuring a physical or chemical magnitude relative to, and/or generating a physical action or effect on, the surroundings thereof.

Electrochemical cell and battery with integrated sensor and/or actuator

The invention relates to an electrochemical element () comprising: a) a container () comprising an opening allowing the introduction of at least one electrochemical beam (); and b) a closing part () for closing said container, comprising: i) at least one flat inner surface () which is oriented towards the inside of the container and can be directly electrically connected to a current collector (), ii) at least one flat outer surface () 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 () 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&#xb0; 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.

Cover for an electrochemical cell with enhanced heat conduction

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.

Battery design with bussing integral to battery assembly

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

Connection method in an accumulator and accumulator thus connected

A container for a sealed secondary cell containing an electrode plate group is provided comprising a wall forming a base () in electrically conducting material, the base comprising a peripheral portion (), a closure member portion () and a weakened portion () joining the peripheral portion () to the closure member portion and designed to rupture in the presence of an excess pressure inside the container. An electrically insulating ring member () is mounted on the peripheral portion to support the electrode plate group, and the container includes an electrically conducting flexible connection part (), electrically connected to the closure member portion () 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.

Container for a sealed secondary cell

A safety device for a sealed cell () comprising alternating positive and negative electrodes respectively connected to positive and negative current output terminals () placed in a container () having an end () that is closed by a wall. The wall of the closed end presents thinning () 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.

Safety device for a sealed cell

A sealed storage battery including a container containing an electrochemical stack having alternating positive and negative electrodes on either side of separators impregnated with electrolyte; a current output terminal passing through a wall of the container; and a connector electrically connecting the electrodes of one polarity to the terminal passing through a wall of the container. The connector includes a flat connection welded to the electrodes and an elastic connection fitted without welding to the terminal passing through a wall of the container.

Electrical connection device for an output terminal of a storage battery

The invention relates to a safety device for a watertight electro-chemical accumulator (), comprising a circuit breaker () which is actuated by an overpressure inside a container () of the accumulator, and a gas generator () 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.

Safety device for a sealed accumulator

An electrical storage cell is provided comprising a container () carrying an electrode plate group () comprising alternating positive and negative electrodes flanking electrolyte-impregnated separators, a current output terminal () passing through a wall () of the container, and an internal connection part () electrically connecting the electrodes of one polarity to the terminal passing through a wall of the container, in which the internal connection part is of copper with at least one copper/nickel co-laminated portion (), eliminating the need for supplementary welding parts employed for welding the copper internal connection.

Electrical connection for a storage cell

A storage battery () includes a container () containing an electrochemical stack () comprising alternating positive and negative electrodes flanking electrolyte-impregnated separators. A current output terminal () passes through a lid () of the container. A connector (), which electrically connects the electrodes of one polarity to the terminal () passing through the lid, includes a flat connection () welded to the electrodes and an elastic connection () which nests into the terminal () passing through the lid. Manufacture of a sealed storage battery is simplified by obviating a manual operation of inserting and bending an elongated connection tab inside the container.

Growing community of inventors

Fargues St Hilaire, France

Gerard Rigobert