Abstract: 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.

Abstract: An electrical storage cell is provided comprising a container (2) carrying an electrode plate group (9) comprising alternating positive and negative electrodes flanking electrolyte-impregnated separators, a current output terminal (7) passing through a wall (5) of the container, and an internal connection part (20) 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 (25, 26), eliminating the need for supplementary welding parts employed for welding the copper internal connection.

Abstract: A storage battery (1) includes a container (2) containing an electrochemical stack (9) comprising alternating positive and negative electrodes flanking electrolyte-impregnated separators. A current output terminal (7) passes through a lid (5) of the container. A connector (10), which electrically connects the electrodes of one polarity to the terminal (7) passing through the lid, includes a flat connection (15) welded to the electrodes and an elastic connection (20) which nests into the terminal (7) 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.

Abstract: A storage battery (1) includes a container (2) containing an electrochemical stack (9) comprising alternating positive and negative electrodes flanking electrolyte-impregnated separators. A current output terminal (7) passes through a lid (5) of the container. A connector (10), which electrically connects the electrodes of one polarity to the terminal (7) passing through the lid, includes a flat connection (15) welded to the electrodes and an elastic connection (20) which nests into the terminal (7) 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.

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 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: 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 vapours are generated.

Abstract: An electrical storage cell is provided comprising a container (2) carrying an electrode plate group (9) comprising alternating positive and negative electrodes flanking electrolyte-impregnated separators, a current output terminal (7) passing through a wall (5) of the container, and an internal connection part (20) 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 (25, 26), eliminating the need for supplementary welding parts employed for welding the copper internal connection.

Abstract: A storage battery (1) comprises a container (2) containing an electrochemical stack (9) comprising alternating positive and negative electrodes flanking electrolyte-impregnated separators. A current output terminal (7) passes through a lid (5) of the container. A connector (10), which electrically connects the electrodes of one polarity to the terminal (7) passing through the lid comprises a flat connection (15) welded to the electrodes and an elastic connection (20) which nests into the terminal (7) 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.

Abstract: A thermal control device for a plurality of chambers comprising a flexible pouch (1) comprising at least one partition (4) delimiting at least two sections (4a, 4b) of a circulation path of a heat transfer fluid, one section being in contact with at least two chambers (5). The invention lies in the discovery that the presence of partitions in the pouch allows for greater rigidity of the pouch and improved temperature control of the battery cells. The invention extends to the manufacturing method for such a device.

Abstract: A cell comprises a container and two current output terminals made of copper situated on a single wall of the container. Each of the current output terminals presents a shoulder. A first terminal is secured to the wall by laser welding, and a second terminal is secured through the wall by crimping with axial displacement of material. The invention facilitates operations of installing and maintaining cells connected together within a module by copper bars. It avoids damaging connections by repeated screwing and unscrewing of nuts screwed onto the terminals when using a screw-and-nut connection system for connecting to the bars.

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: The present invention provides a battery comprising at least one electrochemical cell comprising a leakproof container provided with a capsule suitable for opening in the event of excess internal pressure, and a fire-proofing safety device, the battery being characterized in that said safety device is for preventing reaction products expelled from the cell igniting in the presence of air and comprises in combination:

Abstract: A module including at least two storage cells in a common envelope including a bottom including at least two openings with dimensions at least equal to the size of the storage cells and means for fixing the storage cells in the openings, an intermediate body including housings to receive the storage cells, a plate for electrically connecting the storage cells, and a protective cover.

Abstract: A cylindrical high-capacity sealed storage cell having a terminal at one end which is made of aluminum, wherein: the one end includes an aluminum cover adapted to be brought into contact with an external electrical connecting part by a clamping structure which is at least in part under the cover and co-operates with an external assembly mechanism, the clamping structure being made from a material selected from the group consisting of stainless steel, nickel-plated steel, copper, and brass; and the cover of the cell is sealed by a metal sealing cap under the cover.

Abstract: A battery module including at least one cell, at least one sensor, an interrupter device such as a fuse connected in series with the cells and an electronic switch. The electronic switch includes power transistors for short circuiting the series-connected components and the fuse if the sensor senses a malfunction and a diode for assuring that the power transistors maintain the series-connected circuit short circuited regardless of the subsequent status of the sensor. The diode memorizes the malfunction so that the module continues to conduct after the fuse blows, even if the sensors no longer detect any malfunction.

Abstract: A method of making an electrochemical cell, and an electrode stack made thereby. The method includes fabrication of a coating onto selected areas of the ends of the stack by a thermal spray coating process in which the coating is applied to one of the electrodes in the stack without the coating contacting the alternate edges of the other electrode in the stack. Suitable conductive strips, compatible with the substrate materials that make up the electrodes of the cell, can be attached to the thermally sprayed coating layers, or can be embedded into the sprayed materials as they are applied to the electrode stack.

Abstract: The invention provides a sealed organic-electrolyte cell. A spiral-wound group of electrodes have at least one alternation of negative electrode, separator and positive electrode. The cell has an enclosure made up of a cover and an end wall interconnected in a sealed manner by a side case surrounding the group. Each cover and end wall has a respective current outlet terminal and a central core around which the electrode group is spiral-wound, with an end wall and the cover being fixed to the ends thereof. The case surrounding the group is made of a combined metal-and-plastics multilayer material of a thickness that is smaller than 0.5 mm. The invention also provides a module of such cells and a battery that has at least one such module. The battery is suitable for use as the battery of an electric vehicle.

Abstract: A safety device for an electrochemical storage cell or a module of electrochemical cells, said safety device comprising at least one means for detecting anomalous operation of said storage cell or of a storage cell in said module, said detection means for detecting being associated with a pyrotechnic device, said pyrotechnic device being associated both with at least one means for shearing a portion of an electrical connection strip of said storage cell or of said module, and with at least one means for bypassing the portion which can be sheared.

Abstract: In this device for controlling the temperature of a battery of cylindrically-shaped electrochemical cells placed side by side, heat is conveyed by the flow of a heat-conveying fluid, which flow takes place inside a double wall whose section is in the form of circular arcs interconnected at their ends so that the junction points between the arcs are substantially in alignment. Relief is disposed in a baffle configuration inside the double wall to constrain the fluid to flow parallel to said section, alternately in one direction and then in the opposite direction. The wall is disposed against the battery in such a manner that each of the circular arcs is disposed coaxially against one of the cells.