Patents by Inventor Matthieu Dubarry
Matthieu Dubarry 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).
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Patent number: 11415630Abstract: In one aspect, an embodiment of this invention comprises an apparatus for updating an active fuel gauge of a battery cell. The apparatus comprises a memory, a sensor, and a processor. The memory stores data regarding an active fuel gauge of the battery cell based on a first voltage and state of charge (SOC) relationship. The processor receives first, second, and third resting voltage measurements at different times. The processor calculates differences in capacity between pairs of the resting voltage measurements based on the first voltage and state of charge (SOC) relationship. When the differences are equal the reference capacity difference, the processor identifies an estimate of a remaining capacity of the battery cell corresponding with the active fuel gauge. When the differences are not equal to the reference capacity difference, the processor updates the active fuel gauge based on an identified second voltage and SOC relationship.Type: GrantFiled: February 27, 2017Date of Patent: August 16, 2022Assignee: UNIVERSITY OF HAWAIIInventors: Matthieu Dubarry, Arnaud Devie
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Publication number: 20180321323Abstract: In one aspect, an embodiment of this invention comprises an apparatus for updating an active fuel gauge of a battery cell. The apparatus comprises a memory, a sensor, and a processor. The memory stores data regarding an active fuel gauge of the battery cell based on a first voltage and state of charge (SOC) relationship. The processor receives first, second, and third resting voltage measurements at different times. The processor calculates differences in capacity between pairs of the resting voltage measurements based on the first voltage and state of charge (SOC) relationship. When the differences are equal the reference capacity difference, the processor identifies an estimate of a remaining capacity of the battery cell corresponding with the active fuel gauge. When the differences are not equal to the reference capacity difference, the processor updates the active fuel gauge based on an identified second voltage and SOC relationship.Type: ApplicationFiled: February 27, 2017Publication date: November 8, 2018Inventors: Matthieu Dubarry, Arnaud Devie
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Patent number: 9373835Abstract: The invention relates to a lithium vanadium oxide which corresponds to the formula Li1+?V3O8 (0.1???0.25). It is composed of agglomerates of small needles having a length l from 400 to 1000 nm, a width w such that 10<l/w<100 and a thickness t such that 10<l/t<100. It is obtained by a process consisting in preparing a precursor gel by bringing ?-V2O5 and a Li precursor into contact in amounts such that the ratio of the concentrations [V2O5]/[Li] is between 1.15 and 1.5 and in subjecting the gel to a heat treatment comprising a first stage at 80° C.-150° C. for 3 h to 15 days and a second stage between 250° C. and 350° C. for 4 min to 1 hour, under a nitrogen or argon atmosphere. It is useful as an active material of a positive electrode.Type: GrantFiled: April 5, 2013Date of Patent: June 21, 2016Assignees: BATSCAP, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: Dominique Guyomard, Joel Gaubicher, Marc Deschamps, Matthieu Dubarry, Benoit Morel
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Publication number: 20130216917Abstract: The invention relates to a lithium vanadium oxide which corresponds to the formula Li1+?V3O8 (0.1???0.25). It is composed of agglomerates of small needles having a length l from 400 to 1000 nm, a width w such that 10<l/w<100 and a thickness t such that 10<l/t<100. It is obtained by a process consisting in preparing a precursor gel by bringing ?-V2O5 and a Li precursor into contact in amounts such that the ratio of the concentrations [V2O5]/[Li] is between 1.15 and 1.5 and in subjecting the gel to a heat treatment comprising a first stage at 80° C.-150° C. for 3 h to 15 days and a second stage between 250° C. and 350° C. for 4 min to 1 hour, under a nitrogen or argon atmosphere. It is useful as an active material of a positive electrode.Type: ApplicationFiled: April 5, 2013Publication date: August 22, 2013Applicants: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, BATSCAPInventors: Dominique GUYOMARD, Joel GAUBICHER, Marc DESCHAMPS, Matthieu DUBARRY, Benoit MOREL
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Patent number: 8435484Abstract: The invention relates to a lithium vanadium oxide which corresponds to the formula Li1+?V3O8 (0.1???0.25). It is composed of agglomerates of small needles having a length l from 400 to 1000 nm, a width w such that 10<l/w<100 and a thickness t such that 10<l/t<100. It is obtained by a process consisting in preparing a precursor gel by bringing ?-V2O5 and a Li precursor into contact in amounts such that the ratio of the concentrations [V2O5]/[Li] is between 1.15 and 1.5 and in subjecting the gel to a heat treatment comprising a first stage at 80° C.-150° C. for 3 h to 15 days and a second stage between 250° C. and 350° C. for 4 min to 1 hour, under a nitrogen or argon atmosphere. It is useful as an active material of a positive electrode.Type: GrantFiled: October 18, 2005Date of Patent: May 7, 2013Assignees: BATSCAP, Centre National de la Recherche ScientifiqueInventors: Dominique Guyomard, Joël Gaubicher, Marc Deschamps, Matthieu Dubarry, Benoit Morel
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Patent number: 7959893Abstract: The invention relates to a method for preparing a lithium and vanadium oxide and the thus obtained products. The method comprises preparing a precursor gel by reacting hydrogen peroxide with ?-V2O5 in an aqueous medium in the presence of a lithium precursor and exposing the gel to a heat treatment in an oxidant atmosphere at a temperature ranging from 260° C. to 580° C. A compound of a formula Li1+xV3O8, (0.1<x<0.25) comprises needle-shaped grains having a bimodal distibution, wherein the length (L) of the first distribution needles ranges from 10 to 50 ?m and the length (L) of the second distribution needles ranges from 1 to 10 ?m.Type: GrantFiled: February 16, 2005Date of Patent: June 14, 2011Assignees: Batscap, Centre National de la Recherche ScientifiqueInventors: Dominique Guyomard, Matthieu Dubarry, Marc Deschamps, Joël Gaubicher
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Publication number: 20110033752Abstract: The invention relates to the preparation of an optionally carbonaceous ?-LiV2O5 material. The process consists in preparing a composition formed of carbon and of precursors of Li and of V and in subjecting it to a heat treatment. The composition is prepared by bringing carbon, ?-V2O5 and a Li precursor into contact in amounts such that the ratio of the [V2O5]/[Li] concentrations is between 0.95 and 1.05 and the carbon is in excess of at least 25% with respect to the stoichiometry. The heat treatment is carried out in two stages: a first stage at a temperature between 90° C. and 150° C. for a time of 1 to 12 hours and a second stage at a temperature between 420° C. and 500° C. for a time of between 10 min and 1 hour, under a nitrogen or argon atmosphere or under vacuum.Type: ApplicationFiled: October 19, 2010Publication date: February 10, 2011Applicants: BATSCAP, Centre National De La Recherche ScientifiqueInventors: Dominique GUYOMARD, Joël Gaubicher, Marc Deschamps, Matthieu Dubarry, Benoit Morel
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Patent number: 7842273Abstract: The invention relates to the preparation of an optionally carbonaceous ?-LiV2O5 material. The process consists in preparing a composition formed of carbon and of precursors of Li and of V and in subjecting it to a heat treatment. The composition is prepared by bringing carbon, ?-V2O5 and a Li precursor into contact in amounts such that the ratio of the [V2O5]/[Li] concentrations is between 0.95 and 1.05 and the carbon is in excess of at least 25% with respect to the stoichiometry. The heat treatment is carried out in two stages: a first stage at a temperature between 90° C. and 150° C. for a time of 1 to 12 hours and a second stage at a temperature between 420° C. and 500° C. for a time of between 10 min and 1 hour, under a nitrogen or argon atmosphere or under vacuum. Applications: positive electrode active material.Type: GrantFiled: October 18, 2005Date of Patent: November 30, 2010Assignees: Batscap, Centre National de la Recherche ScientifiqueInventors: Dominique Guyomard, Joël Gaubicher, Marc Deschamps, Matthieu Dubarry, Benoit Morel
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Patent number: 7744835Abstract: The invention relates to a nanostructured material. The material is a nanostructured carbonaceous material composed of agglomerates of small needles of Li1+?V3O8 and of ?-LixV2O5 (0.1???0.25 and 0.03?x?0.667) surrounded by a noncontinuous layer of spherical carbon particles. It is obtained by a process consisting in preparing a carbonaceous precursor gel by bringing carbon, ?-V2O5 and a Li precursor into contact in amounts such that the ratio of the [V2O5]/[Li] concentrations is between 1.15 and 1.5 and that the (carbon)/(carbon+V2O5+Li precursor) ratio by weight is from 10 to 15 and in subjecting the gel to a heat treatment comprising a 1st stage at 80° C.-150° C. for 3-12 h and a 2nd stage between 300° C. and 350° C. for 10 min to 1 hour, under an nitrogen or argon atmosphere. Applications: positive electrode active material.Type: GrantFiled: October 18, 2005Date of Patent: June 29, 2010Assignees: Batscap, Centre National de la Recherche ScientifiqueInventors: Dominique Guyomard, Joël Gaubicher, Marc Deschamps, Matthieu Dubarry, Philippe Moreau
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Publication number: 20100112440Abstract: The invention relates to a lithium vanadium oxide. The oxide corresponds to the formula Li1+?V3O8 (0.1???0.25) and it is composed of agglomerates of small needles having a length l from 400 to 1000 nm, a width w such that 10<l/w<100 and a thickness t such that 10<l/t<100. It is obtained by a process consisting in preparing a precursor gel by bringing ?-V2O5 and a Li precursor into contact in amounts such that the ratio of the concentrations [V2O5]/[Li] is between 1.15 and 1.5 and in subjecting the gel to a heat treatment comprising a 1st stage at 80° C.-150° C. for 3 h to 15 days and a 2nd stage between 250° C. and 350° C. for 4 min to 1 hour, under a nitrogen or argon atmosphere. Applications: positive electrode active material.Type: ApplicationFiled: October 18, 2005Publication date: May 6, 2010Inventors: Dominique Guyomard, Joël Gaubicher, Marc Deschamps, Matthieu Dubarry, Benoit Morel
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Publication number: 20090263724Abstract: The invention relates to a nanostructured material. The material is a nanostructured carbonaceous material composed of agglomerates of small needles of Li1+?V3O8 and of ?-LixV2O5 (0.1 ???0.25 and 0.03 ?×?0.667) surrounded by a noncontinuous layer of spherical carbon particles. It is obtained by a process consisting in preparing a carbonaceous precursor gel by bringing carbon, ?-V2O5 and a Li precursor into contact in amounts such that the ratio of the [V2O5]/[Li] concentrations is between 1.15 and 1.5 and that the (carbon)/(carbon+V2O5+Li precursor) ratio by weight is from 10 to 15 and in subjecting the gel to a heat treatment comprising a 1st stage at 80° C.-150° C. for 3-12 h and a 2nd stage between 300° C. and 350° C. for 10 min to 1 hour, under an nitrogen or argon atmosphere. Applications: positive electrode active material.Type: ApplicationFiled: October 18, 2005Publication date: October 22, 2009Inventors: Dominique Guyomard, Jeol Gaubicher, Marc Deschamps, Matthieu Dubarry, Philippe Moreau
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Publication number: 20080076025Abstract: The invention relates to the preparation of an optionally carbonaceous ?-LiV2O5 material. The process consists in preparing a composition formed of carbon and of precursors of Li and of V and in subjecting it to a heat treatment. The composition is prepared by bringing carbon, ?-V2O5 and a Li precursor into contact in amounts such that the ratio of the [V2O5]/[Li] concentrations is between 0.95 and 1.05 and the carbon is in excess of at least 25% with respect to the stoichiometry. The heat treatment is carried out in two stages: a first stage at a temperature between 90° C. and 150° C. for a time of 1 to 12 hours and a second stage at a temperature between 420° C. and 500° C. for a time of between 10 min and 1 hour, under a nitrogen or argon atmosphere or under vacuum. Applications: positive electrode active material.Type: ApplicationFiled: October 18, 2005Publication date: March 27, 2008Applicants: BATSCAP, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: Dominique Guyomard, Joel Gaubicher, Marc Deschamps, Matthieu Dubarry, Benoit Morel
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Publication number: 20070287061Abstract: The invention relates to a method for preparing a lithium and vanadium oxide and the thus obtained products. The method comprises preparing a precursor gel by reacting hydrogen peroxide with V2O5-? in an aqueous medium in the presence of a lithium precurosor and exposing the gel to a heat treatment in an oxidant atmosphere at a temperature ranging from 260° C. to 580° C. A compound of a formula Li1+?V3O8, (0.1<?<0.25) comprises needle-shaped grains having a bimodal distibution, wherein the length (L) of the first distribution needles ranges from 10 to 50 ?m and the length (L) of the second distribution needles ranges from 10 to 10 ?m.Type: ApplicationFiled: February 16, 2005Publication date: December 13, 2007Inventors: Dominique Guyomard, Matthieu Dubarry, Marc Deschamps, Joel Gaubicher