Patents by Inventor Stephane Levasseur
Stephane Levasseur has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 9821705Abstract: A lighting device for an automotive vehicle comprising means for controlling the supply of power to a plurality of light sources, the plurality of sources being divided into at least two groups of sources. The device according to the invention is remarkable in that each of the light source groups fulfills a specific lighting function of the device and is distinguished by a requirement for electric current of a specific intensity. Additionally, the control means are capable of selectively supplying power to each of the light source groups exclusively of the other groups. A power supply method implementing the device according to the invention is also proposed.Type: GrantFiled: April 28, 2016Date of Patent: November 21, 2017Assignee: Valeo VisionInventor: Stephane Levasseur
-
Patent number: 9722244Abstract: A compound of formula Li4+xMnM1aM2bOc wherein: M1 is selected from the group consisting in Ni, Mn, Co, Fe and a mixture thereof; M2 is selected from the group consisting in Si, Ti, Mo, B, Al and a mixture thereof; with: ?1.2?x?3; 0<a?2.5; 0?b?1.5; 4.3?c?10; and c=4+a+n·b+x/2 wherein n=2 when M2 is selected from the group consisting in Si, Ti, Mo or a mixture thereof; and n=1.5 when M2 is selected from the group consisting in B, Al or a mixture thereof; and n=0 if b=0.Type: GrantFiled: September 11, 2013Date of Patent: August 1, 2017Assignees: SAFT, UMICOREInventors: Christian Jordy, Georges Caillon, Thierry Hezeque, Stephane Levasseur, Nina V. Kosova, Evgeniya T. Devyatkina
-
Publication number: 20160372233Abstract: A motor vehicle light device comprising at least one light module and at least one electric cable, wherein at least one longitudinal portion of the electric cable is surrounded at least partly or completely by at least one protective jacket, the protective jacket being an electrically conductive polymer jacket.Type: ApplicationFiled: June 14, 2016Publication date: December 22, 2016Inventors: Erwan Faoucher, Michel Hermitte, Stephane Levasseur
-
Publication number: 20160318439Abstract: A lighting device for an automotive vehicle comprising means for controlling the supply of power to a plurality of light sources, the plurality of sources being divided into at least two groups of sources. The device according to the invention is remarkable in that each of the light source groups fulfills a specific lighting function of the device and is distinguished by a requirement for electric current of a specific intensity. Additionally, the control means are capable of selectively supplying power to each of the light source groups exclusively of the other groups. A power supply method implementing the device according to the invention is also proposed.Type: ApplicationFiled: April 28, 2016Publication date: November 3, 2016Inventor: Stephane Levasseur
-
Patent number: 9214673Abstract: A compound of formula Lia+y(M1(1?t)Mot)2M2b(O1?xF2x)c wherein: M1 is selected from the group consisting in Ni, Mn, Co, Fe, V or a mixture thereof; M2 is selected from the group consisting in B, Al, Si, P, Ti, Mo; with 4?a?6; 0<b?1.8; 3.8?c?14; 0?x<1; ?0.5?y?0.5; 0?t?0.9; b/a<0.45; the coefficient c satisfying one of the following relationships: c=4+y/2+z+2t+1.5b if M2 is selected from B and Al; c=4+y/2+z+2t+2b if M2 is selected from Si, Ti and Mo; c=4+y/2+z+2t+2.5b if M2 is P; with z=0 if M1 is selected from Ni, Mn, Co, Fe and z=1 if M1 is V.Type: GrantFiled: March 7, 2012Date of Patent: December 15, 2015Assignees: SAFT, UMICOREInventors: Georges Caillon, Stephane Levasseur, Thlerry Hezeque, Christian Jordy, Nina V. Kosova, Evgeniya T. Devyatkina
-
Publication number: 20150214547Abstract: A compound of formula Li4+xMnM1aM2bOc wherein: M1 is selected from the group consisting in Ni, Mn, Co, Fe and a mixture thereof; M2 is selected from the group consisting in Si, Ti, Mo, B, Al and a mixture thereof; with: ?1.2?x?3; 0<a?2.5; 0?b?1.5; 4.3?c?10; and c=4+a+n·b+x/2 wherein n=2 when M2 is selected from the group consisting in Si, Ti, Mo or a mixture thereof; and n=1.5 when M2 is selected from the group consisting in B, Al or a mixture thereof; and n=0 if b=0.Type: ApplicationFiled: September 11, 2013Publication date: July 30, 2015Applicants: SAFT, UMICOREInventors: Christian Jordy, Georges Caillon, Thierry Hezeque, Stephane Levasseur, Nina V. Kosova, Evgeniya T. Devyatkina
-
Patent number: 9051184Abstract: The invention relates to crystalline nanometric olivine-type LiFe1-xMxPO4 powder with M being Co and/or Mn, and 0?x?1, with small particle size and narrow particle size distribution. A direct precipitation process is described, comprising the steps of: providing a water-based mixture having at a pH between 6 and 10, containing a dipolar aprotic additive, and Li(I), Fe(II), P(V), and Co(II) and/or Mn(II) as precursor components; heating said water-based mixture to a temperature less than or equal to its boiling point at atmospheric pressure, thereby precipitating crystalline LiFe1-xMxPO4 powder. An extremely fine particle size is obtained of about 80 nm for Mn and 275 nm for Co, both with a narrow distribution.Type: GrantFiled: October 6, 2011Date of Patent: June 9, 2015Assignees: Umicore, Centre National de la Recherche ScientifiqueInventors: Stéphane Levasseur, Michèle Van Thournout, Pierre Gibot, Christian Masquelier
-
Patent number: 8753532Abstract: The invention relates to a LiaNixCoyMny?M?zO2 composite oxide for use as a cathode material in a rechargeable battery, with a non-homogenous Ni/M? ratio in the particles, allowing excellent power and safety properties when used as positive electrode material in Li battery. More particularly, in the formula 0.9<a<1.1, 0.3?x?0.9, 0<y?0.4, 0<y??0.4, 0<z?0.35, e<0.02, 0?f?0.05 and 0.9<(x+y+y?+z+f)<1.1; M? consists of either one or more elements from the group Al, Mg, Ti, Cr, V, Fe, Mn and Ga; N consists of either one or more elements from the group F, Cl, S, Zr, Ba, Y, Ca, B, Sn, Sb, Na and Zn. The powder has a particle size distribution defining a D10, D50 and D90; and the x and z parameters varying with the particles size of the powder, and is characterized in that either one or both of: x1?x2?0.005 and z2?z1?0.Type: GrantFiled: August 15, 2011Date of Patent: June 17, 2014Assignee: UmicoreInventors: Stephane Levasseur, Philippe Carlach, Randy De Palma, Michèle Van Thournout
-
Publication number: 20140113188Abstract: The invention relates to active materials for the manufacture of Li-based batteries. A crystalline nanometric powdered material with formula Lix(M, M?)PO4, in particular LixFePO4 (0?x?1), is disclosed, exhibiting single phase Li insertion/extraction mechanism at room temperature when used as positive electrode material in Li-based batteries. Compared to current LiFePO4, the novel material results in smooth, sloping charge/discharge voltage curves, greatly simplifying the monitoring of the state of charge of the batteries. The coexistence of mixed valence states for Fe (i.e. FeIIIVFeII) is believed to increase the electronic conductivity in the room temperature single phase LixFePO4 material, compared to state of the art two-phase materials. This, together with the nanometric size of the particles and their sharp monomodal size distribution, contributes to the exceptional high-rate capability demonstrated in batteries.Type: ApplicationFiled: December 23, 2013Publication date: April 24, 2014Inventors: Pierre GIBOT, Christian MASQUELIER, Jean-Marie TARASCON, Stephane LEVASSEUR, Philippe CARLACH
-
Patent number: 8673170Abstract: The invention relates to a LiaNixCoyMzO2±eAf composite oxide for use as a cathode material in a rechargeable battery, with a non-homogenous Ni/Al ratio in the particles, allowing excellent power and safety properties when used as positive electrode material in Li battery. More particularly, in the formula 0.9<a<1.1, 0.3?x?0.9, 0?y?0.4, 0<z?0.35, e=0, 0?f?0.05 and 0.9<(x+y+z+f)<1.1; M consists of either one or more elements from the group Al, Mg and Ti; A consists of either one or more elements from the group S and C. The powder has a particle size distribution defining a D10, D50 and D90; and said x and z parameters varying with the particles size of said powder, and is characterized in that either one or both of: x1?x2?0.010 and z2?z1?0.010; x1 and z1 being the parameters corresponding to particles having a particle size D90; and x2 and z2 being the parameters corresponding to particles having a particle size D10.Type: GrantFiled: January 29, 2010Date of Patent: March 18, 2014Assignee: UmicoreInventors: Stephane Levasseur, Philippe Carlach, Randy De Palma, Michèle Van Thournout
-
Patent number: 8641921Abstract: The invention relates to active materials for the manufacture of Li-based batteries. A crystalline nanometric powdered material with formula Lix(M, M?)PO4, in particular LixFePO4 (O?x?1), is disclosed, exhibiting single phase Li insertion/extraction mechanism at room temperature when used as positive electrode material in Li-based batteries. Compared to current LiFePO4, the novel material results in smooth, sloping charge/discharge voltage curve greatly simplifying the monitoring of the state of charge of the batteries. The coexistence of mixed valence states for Fe (i.e. FeIIIVFeII) is believed to increase the electronic conductivity in the room temperature single phase LixFePO4 material, compared to state of the art two-phase materials. This, together with the nanometric size of the particles and their sharp monomodal size distribution, contributes to the exceptional high-rate capability demonstrated in batteries.Type: GrantFiled: March 19, 2008Date of Patent: February 4, 2014Assignees: Umicore, Centre National de la Recherche ScientifiqueInventors: Pierre Gibot, Christian Masquelier, Jean-Marie Tarascon, Stephane Levasseur, Philippe Carlach
-
Patent number: 8486309Abstract: An active material for a lithium battery electrode comprises a phase having the formula Li2+v?4cCcTi3?wFexMyM?zO7??, in which M and M? are metal ions of groups of 2 to 15 having an ionic radius between 0.5 and 0.8 ? in an octahedral environment, v, w, x, y, z and ? being associated by the relationships: 2?=?v+4w?3x?ny?n?z, with n and n? being the respective formal degrees of oxidation of M and M?; ?0.5?v?0.5; y+z>0; x+y+z=w; and 0<w?0.3; and wherein at least part of the lithium is substituted by carbon according to the relationship 0<c(2+v)/4. The invention also includes a method for synthesizing the active material which comprises mixing and grinding the precursor compounds containing the metal components, carbon and oxygen; heating the mixture in an inert atmosphere at a temperature of 950 to 1050° C. in order to make a ceramic phase; and rapidly cooling the ceramic phase to produce the active material.Type: GrantFiled: November 19, 2008Date of Patent: July 16, 2013Assignees: Umicore, Centre National de la Recherche Scientifique, Saft Groupe S.A., Universite Montpellier 2Inventors: Stéphane Levasseur, Cécile Tessier, Josette Olivier-Fourcade, Laure Monconduit, Costana Ionica-Bousquet, Claire Villevieille, Michèle Van Thournout
-
Publication number: 20130017447Abstract: An electrode material comprising a LixFeyMzPw04 compound for an electrode for a Li rechargeable battery, wherein 0.90<=x<=1.03, 0.85<=y<=1.0, 0.01<=z<=0.15, 0.90<=w<=1.0, 1.9<=x+y+z<=2.1; wherein M comprises at least one element selected from the group consisting of Mn, Co, Mg, Cr, Zn, Al, Ti, Zr, Nb, Na, and Ni; and wherein the compound comprises a charge transfer resistance increase of less than 20% between room temperature and 0° C.Type: ApplicationFiled: September 24, 2010Publication date: January 17, 2013Inventors: Cécile Tessier, Stephane Levasseur, Philippe Biensan, Julien Breger
-
Publication number: 20120295162Abstract: A compound of formula Lia+y(M1(1?t)Mot)2M2b(O1?xF2x)c wherein: M1 is selected from the group consisting in Ni, Mn, Co, Fe, V or a mixture thereof; M2 is selected from the group consisting in B, Al, Si, P, Ti, Mo; with 4?a?6; 0<b?1.8; 3.8?c?14; 0?x<1; ?0.5?y?0.5; 0?t?0.9; b/a<0.45; the coefficient c satisfying one of the following relationships: c=4+y/2+z+2t+1.5b if M2 is selected from B and Al; c=4+y/2+z+2t+2b if M2 is selected from Si, Ti and Mo; c=4+y/2+z+2t+2.5b if M2 is P; with z=0 if M1 is selected from Ni, Mn, Co, Fe and z=1 if M1 is V.Type: ApplicationFiled: March 7, 2012Publication date: November 22, 2012Applicants: UMICORE, SAFTInventors: Georges CAILLON, Stephane LEVASSEUR, Thierry HEZEQUE, Christian JORDY, Nina V. KOSOVA, Evgeniya T. DEVYATKINA
-
Publication number: 20120104311Abstract: The invention relates to a LiaNixCoyMzO2±eAf composite oxide for use as a cathode material in a rechargeable battery, with a non-homogenous Ni/Al ratio in the particles, allowing excellent power and safety properties when used as positive electrode material in Li battery. More particularly, in the formula 0.9<a<1.1, 0.3?x?0.9, 0?y?0.4, 0<z?0.35, e=0, 0?f?0.05 and 0.9<(x+y+z+f)<1.1; M consists of either one or more elements from the group Al, Mg and Ti; A consists of either one or more elements from the group S and C. The powder has a particle size distribution defining a D10, D50 and D90; and said x and z parameters varying with the particles size of said powder, and is characterized in that either one or both of: x1?x2?0.010 and z2?z1?0.010; x1 and z1 being the parameters corresponding to particles having a particle size D90; and x2 and z2 being the parameters corresponding to particles having a particle size D10.Type: ApplicationFiled: January 29, 2010Publication date: May 3, 2012Inventors: Stephane Levasseur, Philippe Carlach, Randy De Palma, Michèle Van Thournout
-
Publication number: 20120085975Abstract: The invention relates to crystalline nanometric olivine-type LiFe1-xMxPO4 powder with M being Co and/or Mn, and 0?x?1, with small particle size and narrow particle size distribution. A direct precipitation process is described, comprising the steps of: providing a water-based mixture having at a pH between 6 and 10, containing a dipolar aprotic additive, and Li(I), Fe(II), P(V), and Co(II) and/or Mn(II) as precursor components; heating said water-based mixture to a temperature less than or equal to its boiling point at atmospheric pressure, thereby precipitating crystalline LiFe1-xMxPO4 powder. An extremely fine particle size is obtained of about 80 nm for Mn and 275 nm for Co, both with a narrow distribution.Type: ApplicationFiled: October 6, 2011Publication date: April 12, 2012Applicants: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, UMICOREInventors: Stephane LEVASSEUR, Michèle VAN THOURNOUT, Pierre GIBOT, Christian MASQUELIER
-
Publication number: 20120074351Abstract: The invention relates to a LiaNixCoyMny?M?zO2 composite oxide for use as a cathode material in a rechargeable battery, with a non-homogenous Ni/M? ratio in the particles, allowing excellent power and safety properties when used as positive electrode material in Li battery. More particularly, in the formula 0.9<a<1.1, 0.3?x?0.9, 0<y?0.4, 0<y??0.4, 0<z?0.35, e<0.02, 0?f?0.05 and 0.9<(x+y+y?+z+f)<1.1; M? consists of either one or more elements from the group Al, Mg, Ti, Cr, V, Fe, Mn and Ga; N consists of either one or more elements from the group F, Cl, S, Zr, Ba, Y, Ca, B, Sn, Sb, Na and Zn. The powder has a particle size distribution defining a D10, D50 and D90; and the x and z parameters varying with the particles size of the powder, and is characterized in that either one or both of: x1?x2?0.005 and z2?z1?0.Type: ApplicationFiled: August 15, 2011Publication date: March 29, 2012Inventors: Stephane LEVASSEUR, Philippe CARLACH, Randy DE PALMA, Michèle VAN THOURNOUT
-
Patent number: 8105508Abstract: The present invention relates to crystalline nanometric olivine-type LiFe1-xMnxPO4 powder with 0<x<1, with small particle size and narrow particle size distribution. The fine particle size is believed to account for excellent high-drain properties, while minimizing the need for conductive additives. The narrow distribution facilitates the electrode manufacturing process and ensures a homogeneous current distribution within the battery.Type: GrantFiled: June 29, 2010Date of Patent: January 31, 2012Assignees: Umicore, Centre National de la Recherche ScientifiqueInventors: Stéphane Levasseur, Michèle Van Thournout, Pierre Gibot, Christian Masquelier
-
Patent number: 8080184Abstract: A compound of formula Li1+x(NiaMnbCocAly)1?xO2 wherein: a, b and c are non-zero; a+b+c+y=1; 1.05?(1+x)/(1?x)?1.25; 0.015?y(1?x); and the atomic amount of manganese representing from 95% to 100% of the atomic amount of nickel.Type: GrantFiled: October 1, 2009Date of Patent: December 20, 2011Assignees: Saft, Centre National de la Recherche Scientifique, UmicoreInventors: Julien Breger, Frederic Castaing, Philippe Biensan, Jessica Bains, Laurence Croguennec, Claude Delmas, Stephane Levasseur
-
Patent number: 8066916Abstract: The present invention relates to lithium secondary batteries and more specifically to positive electrode materials operating at potentials greater than 2.8 V vs. Li+/Li in non-aqueous electrochemical cells. In particular, the invention relates to crystalline nanometric olivine-type LiFe1-xMxPO4 powder with M is Co and/or Mn, and 0<x<1, with small particle size and narrow particle size distribution. A direct precipitation process is described, comprising the steps of:—providing a water-based mixture having at a pH between 6 and 10, containing a dipolar aprotic additive, and Li(I), Fe(II), P(V), and Co(II) and/or Mn(II) as precursor components;—heating said water-based mixture to a temperature less than or equal to its boiling point at atmospheric pressure, thereby precipitating crystalline LiFe1-xMxPO4 powder. An extremely fine particle size is obtained of about 80 nm for Mn and 275 nm for Co, both with a narrow distribution.Type: GrantFiled: November 19, 2007Date of Patent: November 29, 2011Assignees: Umicore, Centre National de la Recherche ScientifiqueInventors: Stephane Levasseur, Michèle Van Thournout, Pierre Gibot, Christian Masquelier