Patents Assigned to Saft Groupe SA
  • Patent number: 8999582
    Abstract: A composition including (a) a lithiated oxide of transition metals containing at least nickel, cobalt and aluminum and (b) a lithiated phosphate of at least one transition metal, the surface of which is at least partially covered by a layer of carbon. In the composition, the proportion by mass of the lithiated oxide of transition metals containing at least nickel, cobalt and aluminum is less than or equal to 10% of the weight of the composition, and the proportion by mass of the lithiated phosphate of at least one transition metal is greater than or equal to 90% of the weight of the composition. A lithium-ion or lithium-polymer type accumulator including at least one positive electrode containing this composition.
    Type: Grant
    Filed: June 23, 2010
    Date of Patent: April 7, 2015
    Assignee: SAFT Groupe SA
    Inventors: Cecile Tessier, Julien Breger, Olivier Jan, Philippe Biensan, Bridget Deveney, Kamen Nechev
  • Patent number: 8889296
    Abstract: The hydration of cadmium oxide in the presence of nickel acetate gives the possibility of obtaining a compound of general formula Cd1-xNix(OH)2-y(CH3CO2)y with 0<x?0.05 and 0<y?0.10. This compound may be advantageously, used as an electrochemically active material of an anode of the envelope type of a nickel cadmium generator. This anode does not contain any sulfates responsible for the formation of short-circuits. Further, this anode has a high electrochemical yield. A method for preparing this compound and the anode is described.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: November 18, 2014
    Assignee: Saft Groupe SA
    Inventors: Stéphanie Chevalier, Claudette Audry, Mélanie Dendary, Philippe Desprez, Björn Marlid, Rune Sjövall, Jerry Gottfridsson
  • Patent number: 8841877
    Abstract: An electrical power supply system is provided comprising a number of rechargeable cells, a number of control electronics circuits and a charger which consists of apparatus for producing electricity from a renewable energy source, the electrochemical cells being divided into separate branches connected in parallel to the charger. Each control electronics circuit controls the charging of one branch by measuring a current being applied to the branch, integrating the current measured in the branch, determining a state of charge of the cell or cells of the branch, comparing the integrated current value with a set value set as a function of the determined state of charge, and interrupting the passage of current being applied to the branch when the integrated current reaches the set value. This system makes it possible to optimize the sharing out of charging current between parallel branches of battery cells while being adaptable as regards the number of cells used in parallel in the system.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: September 23, 2014
    Assignee: Saft Groupe SA
    Inventors: Claude Chanson, Antoine Juan
  • Patent number: 8685555
    Abstract: A safety current interrupter device for a rechargeable cell is provided comprising a deformable material (2) adapted to deform when the temperature reaches a threshold value, a deformable membrane (3) adapted to deform under the effect of pressure and/or deformation of the deformable material (2), and an electrically conductive link member (4), adapted to break as a result of the deformation of the deformable membrane (3).
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: April 1, 2014
    Assignee: Saft Group SA
    Inventors: Philippe Borel, Cecile Tessier
  • Patent number: 8652684
    Abstract: The invention proposes a composition comprising: a) a hydrogen-fixing alloy of formula R1-tMgtNis-zMz in which: R represents one or more elements chosen from the group comprising La, Ce, Nd and Pr; M represents one or more elements chosen from the group comprising Mn, Fe, Al, Co, Cu, Zr and Sn; 0.1?t?0.4; 3.0?s?4.3; z?0.5; b) a manganese compound in a proportion such that the mass of manganese represents from 1 to 5.5% of the mass of the alloy, c) an yttrium compound in a proportion such that the mass of yttrium represents from 0.1% to 2% of the mass of the alloy. The invention also relates to an anode comprising the composition according to the invention. The invention also relates to an alkaline electrolyte battery comprising said at least one anode.
    Type: Grant
    Filed: September 6, 2007
    Date of Patent: February 18, 2014
    Assignee: Saft Groupe SA
    Inventors: Patrick Bernard, Bernard Knosp, Michelle Baudry
  • Patent number: 8470196
    Abstract: An alloy comprising tin, silicon and carbon, and containing a crystalline M-Sn phase, M being an inert metal. An alloy comprising tin and silicon, comprising: a) a nanocrystalline phase containing at least 50 at. % of the element silicon Si°; b) a nanocrystalline phase containing a compound based on tin; c) a nanocrystalline phase constituted by the element tin Sn°. A manufacturing process for this alloy.
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: June 25, 2013
    Assignees: Saft Groupe SA, Centre National de la Recherche Scientifique, Universite Paris XII Val de Marne
    Inventors: Thierry Hezeque, Fermin Cuevas, Michel Latroche, Georges Caillon, Christian Jordy, Claudette Audry
  • Patent number: 8007549
    Abstract: The subject of the present invention is a system for electric coupling of a plane connection (64, 67) to the electrodes of the same polarity of an electrochemical bundle (63) comprising an alternating sequence of at least one positive electrode and at least one negative electrode framing a separator, each electrode comprising a metal strip less than 50 ?m thick, serving as current collector, at least one surface of which is coated with a paste containing the electrochemically active material, the strips of the electrodes of each polarity comprising a non-coated lateral band emerging respectively from the opposite ends of said bundle, characterized in that the lateral bands of the strips of the same polarity are folded in a direction approximately perpendicular to their initial direction at a height at least equal to the distance separating them from the adjacent strips of the same polarity in order to form an approximately plane and continuous base (65, 68) to which said plane connection is welded.
    Type: Grant
    Filed: November 17, 2008
    Date of Patent: August 30, 2011
    Assignee: Saft Groupe SA
    Inventors: Dominique Ligeois, Philippe Lacoste, Franck Fargeas
  • Publication number: 20110151329
    Abstract: A positive electrode of an accumulator with an alkaline electrolyte comprising a nickel-based hydroxide and a lithiated oxide of formula LixMO2 wherein M represents at least one transition metal, 0.1?×?1, said lithiated oxide having a specific surface area as measured by the BET technique of less than 40 m2/g and a grain size of less than 1 ?m. A method for making a lithiated oxide of at least one transition metal comprising the steps of: a) providing a powder of an hydroxide of said at least one transition metal, b) suspending the powder in a lithine solution in the presence of a stream of a oxidizing gas in order to form a lithiated oxide of said at least one transition metal, the lithine concentration being at least equal to about 1 mol/L, c) adding to the suspension of step b) a solution containing an oxidizing compound, d) filtering the suspension, e) washing and drying the suspension.
    Type: Application
    Filed: August 25, 2009
    Publication date: June 23, 2011
    Applicant: Saft Group SA
    Inventors: Patrick Bernard, Lionel Goubault, Rémi Najean
  • Patent number: 7940027
    Abstract: A method to manage charge and/or discharge of a rechargeable battery comprising at least one electrochemical cell having predetermined maximum continuous charge current (IMR_C) and/or discharge current (IMD_C) allowed, the method comprising the steps of: measuring an instantaneous charge current (I); defining an overcharge capacity (Cap); determining an instantaneous maximum current allowed in charge (IMR) as a function of the overcharge capacity; and/or defining an over thermal capacity (CapTh); determining an instantaneous maximum pulse current allowed in discharge (IMD_max) as a function of the over thermal capacity.
    Type: Grant
    Filed: October 19, 2007
    Date of Patent: May 10, 2011
    Assignee: Saft Groupe SA
    Inventors: Philippe Desprez, Gerard Barrailh, Sebastien Benjamin
  • Patent number: 7834590
    Abstract: An electronic system for a battery comprises a charging circuit (20) for the battery connected to a connector powering the charging circuit (15), a control and monitoring circuit (30) for the operation of the battery, and a discharge circuit connected to power connectors (2) of the battery. The control and monitoring circuit (30) interrupts battery charging when there is a call for current via the power connectors (2) of the battery. The electronic system has application to rechargeable batteries used to provide back up power.
    Type: Grant
    Filed: June 14, 2007
    Date of Patent: November 16, 2010
    Assignee: Saft Groupe SA
    Inventors: Philippe Genin, Christophe Morin
  • Publication number: 20100270497
    Abstract: An alloy comprising tin, silicon and carbon, and containing a crystalline M-Sn phase, M being an inert metal. An alloy comprising tin and silicon, comprising: a) a nanocrystalline phase containing at least 50 at. % of the element silicon Si°; b) a nanocrystalline phase containing a compound based on tin; c) a nanocrystalline phase constituted by the element tin Sn°. A manufacturing process for this alloy.
    Type: Application
    Filed: April 9, 2010
    Publication date: October 28, 2010
    Applicants: SAFT GROUP SA, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS), UNIVERSITE PARIS XII VAL DE MARNE
    Inventors: Thierry HEZEQUE, Fermin CUEVAS, Michel LATROCHE, Georges CAILLON, Christian JORDY, Claudette AUDRY
  • Patent number: 7799459
    Abstract: A compound for use as active material of a positive electrode of a lithium-ion cell. This compound has an average discharge voltage above 4.5V in relation to the Li+/Li couple of approximately 4.7V. The compound includes: a) a spinel-type crystalline phase of formula LiaNiII0.5?xMnIII2xMnIV1.5?x?yMyO4 in which elements Ti and Al, or a mixture of these; 0.8<a<1.3; 0<x?0.15; 0<y?0.15; b) a cubic crystalline phase of formula Li1?tNi1+tO in which 0?t?1; and c) a rhomboedric crystalline phase of formula Li1?ZNi1+zO2 in which 0?z?1.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: September 21, 2010
    Assignee: Saft Groupe SA
    Inventors: Jean-Paul Peres, Stephane Gillot, Frederic Chouquais, Claudette Audry, Andre Lecerf
  • Patent number: 7568958
    Abstract: A terminal for a sealed accumulator includes a single-piece body made of aluminium with at least one tinned zone for soldering to an electronic card and at least one non-tinned zone for connection to a current output terminal of the accumulator. The electrical terminal has a limited space requirement; welds well onto an accumulator container made of aluminium and allows easy assembly with an electronic card by soldering without risk of migration of tin which could cause a short circuit.
    Type: Grant
    Filed: March 4, 2008
    Date of Patent: August 4, 2009
    Assignee: Saft Groupe SA
    Inventor: Nicolas Vigier
  • Publication number: 20090139082
    Abstract: The subject of the present invention is a system for electric coupling of a plane connection (64, 67) to the electrodes of the same polarity of an electrochemical bundle (63) comprising an alternating sequence of at least one positive electrode and at least one negative electrode framing a separator, each electrode comprising a metal strip less than 50 ?m thick, serving as current collector, at least one surface of which is coated with a paste containing the electrochemically active material, the strips of the electrodes of each polarity comprising a non-coated lateral band emerging respectively from the opposite ends of said bundle, characterized in that the lateral bands of the strips of the same polarity are folded in a direction approximately perpendicular to their initial direction at a height at least equal to the distance separating them from the adjacent strips of the same polarity in order to form an approximately plane and continuous base (65, 68) to which said plane connection is welded.
    Type: Application
    Filed: November 17, 2008
    Publication date: June 4, 2009
    Applicant: SAFT GROUP SA
    Inventors: Dominique LIGEOIS, Philippe LACOSTE, Franck FARGEAS
  • Patent number: 7335443
    Abstract: A system for electric coupling of a flat connection to a current output terminal comprising a tubular conducting slug is provided in which the connection comprises a hole and the connection is fixed on a transversal section of the slug in such a manner as to cause the hole to communicate with the inside of the tube.
    Type: Grant
    Filed: April 2, 2004
    Date of Patent: February 26, 2008
    Assignee: Saft Group SA
    Inventor: Frederic Magneron