Patents by Inventor Gérard Barrailh
Gérard Barrailh 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: 11754636Abstract: The invention concerns a method for estimating the state of health (SOH) of an electrochemical element, comprising: initiating a charging or discharging operation of the electrochemical element; measuring values representing deformations of the electrochemical element while the charging or discharging operation is being performed, the deformation values measured forming a deformations image signal according to the quantity of electricity passing through the electrochemical element over time; comparing the deformations image signal and a reference image signal, one or more differences obtained by the comparison characterising an estimation of the ageing of the electrochemical element.Type: GrantFiled: December 15, 2019Date of Patent: September 12, 2023Assignee: SAFTInventors: Sébastien Laurent, Gérard Barrailh, Nathalie Legrand, Emilie Buisson, Rémi Didelon
-
Publication number: 20220187385Abstract: The invention concerns a method for estimating the state of health (SOH) of an electrochemical element, comprising: initiating a charging or discharging operation of the electrochemical element; measuring values representing deformations of the electrochemical element while the charging or discharging operation is being performed, the deformation values measured forming a deformations image signal according to the quantity of electricity passing through the electrochemical element over time; comparing the deformations image signal and a reference image signal, one or more differences obtained by the comparison characterising an estimation of the ageing of the electrochemical element.Type: ApplicationFiled: December 15, 2019Publication date: June 16, 2022Inventors: Sébastien Laurent, Gérard Barrailh, Nathalie Legrand, Emilie Buisson, Rémi Didelon
-
Patent number: 11035906Abstract: The invention relates to a method for determining the value of one or more parameters relating to the state of health of at least one accumulator of a battery that is intended to provide electrical energy to an external application, an electronic battery management system implementing this method, and a battery provided with this system.Type: GrantFiled: April 12, 2017Date of Patent: June 15, 2021Assignee: SAFTInventors: Sebastien Laurent, Philippe Desprez, Gerard Barrailh
-
Publication number: 20190064283Abstract: The invention relates to a method for determining the value of one or more parameters relating to the state of health of at least one accumulator of a battery that is intended to provide electrical energy to an external application, an electronic battery management system implementing this method, and a battery provided with this system.Type: ApplicationFiled: April 12, 2017Publication date: February 28, 2019Applicant: SAFTInventors: Sebastien LAURENT, Philippe DESPREZ, Gerard BARRAILH
-
Patent number: 9762077Abstract: The invention relates to a method and a system for managing the charging of a rechargeable battery by a voltage control or by a current control comprising a plurality (n) of branches connected in series, each branch comprising a plurality (p) of electrochemical elements connected in parallel. Each electrochemical element exhibits a charging profile (PC) comprising at least one plateau zone directly followed by a sloping zone in which the variation of the voltage as a function of the state of charge in the plateau zone is on average at least ten times less fast than the variation of the voltage in the sloping zone.Type: GrantFiled: July 1, 2014Date of Patent: September 12, 2017Assignee: SAFTInventors: Philippe Desprez, Sebastien Benjamin, Ali Zenati, Gerard Barrailh
-
Publication number: 20160301219Abstract: The invention relates to a method and a system for managing the charging of a rechargeable battery by a voltage control or by a current control comprising a plurality (n) of branches connected in series, each branch comprising a plurality (p) of electrochemical elements connected in parallel. Each electrochemical element exhibits a charging profile (PC) comprising at least one plateau zone directly followed by a sloping zone in which the variation of the voltage as a function of the state of charge in the plateau zone is on average at least ten times less fast than the variation of the voltage in the sloping zone.Type: ApplicationFiled: July 1, 2014Publication date: October 13, 2016Applicant: SAFTInventors: Philippe DESPREZ, Sebastien BENJAMIN, Ali ZENATI, Gerard BARRAILH
-
Patent number: 9316693Abstract: A method and system are provided for estimating state of charge of a cell having a positive electrode, for example of a lithium phosphate type, the charge profile of which includes a range of state of charge between about 30 and about 90% in which variation of voltage is 10 times less rapid than for a state of charge higher than 90%. Determination of state of charge for a state of charge greater than 90% is based on either the use of a calibration relationship between cell voltage and state of charge when a current is passing through the cell that is less than a predetermined threshold value and its voltage has stabilized, or on the use of coulometry the result of which is corrected taking into account the accuracy of the current sensor.Type: GrantFiled: March 1, 2013Date of Patent: April 19, 2016Assignee: SAFTInventors: Sebastien Benjamin, Philippe Desprez, Ali Zenati, Gerard Barrailh
-
Patent number: 8775106Abstract: A method for determining a parameter such as the resistance of at least one accumulator of a battery. The method includes the following steps: measuring a first voltage (U1) when the current is substantially equal to a predetermined value; conducting the plurality of voltage and current measurements (Un; In) during a current pulse; calculating a plurality of resistance values (Rn) from the first voltage and from the plurality of voltage and current measurements; determining a resistance value as the average of the calculated resistance values and an associated standard deviation; determining an absolute uncertainty on the value of the resistance as the product of the standard deviation and of a Student coefficient; if the relative uncertainty is less than or equal to a predetermined accuracy threshold, validating the resistance value (R).Type: GrantFiled: July 19, 2011Date of Patent: July 8, 2014Assignee: Universite dé LorraineInventors: Ali Zenati, Philippe Desprez, Gerard Barrailh, Hubert Razik, Stephane Rael
-
Patent number: 8635038Abstract: The invention is a monitoring system for a battery having a plurality of accumulators. The system comprises apparatus for measuring the voltage on the terminals of each accumulator; measuring the temperature of the battery; measuring the current flowing through the battery, calculating a voltage difference between a maximum voltage measured on the terminals of one of the accumulators and a minimum voltage measured on the terminals of one of the accumulators; comparing the voltage difference with at least one threshold value depending on the measured temperature and current, and reporting an error if the voltage difference is greater than or equal to the at least one threshold value.Type: GrantFiled: June 14, 2011Date of Patent: January 21, 2014Assignee: SAFTInventors: Sebastien Benjamin, Philippe Desprez, Gerard Barrailh, Philippe Laflaquiere
-
Publication number: 20130229154Abstract: A method and system are provided for estimating state of charge of a cell having a positive electrode, for example of a lithium phosphate type, the charge profile of which includes a range of state of charge between about 30 and about 90% in which variation of voltage is 10 times less rapid than for a state of charge higher than 90%. Determination of state of charge for a state of charge greater than 90% is based on either the use of a calibration relationship between cell voltage and state of charge when a current is passing through the cell that is less than a predetermined threshold value and its voltage has stabilized, or on the use of coulometry the result of which is corrected taking into account the accuracy of the current sensor.Type: ApplicationFiled: March 1, 2013Publication date: September 5, 2013Applicant: SAFTInventors: Sebastien BENJAMIN, Philippe DESPREZ, Ali ZENATI, Gerard BARRAILH
-
Publication number: 20120022816Abstract: A method for determining a parameter such as the resistance of at least one accumulator of a battery, comprising the steps: measuring a first voltage (U1) when the current is substantially equal to a predetermined value; conducting the plurality of voltage and current measurements (Un; In) during a current pulse; calculating a plurality of resistance values (Rn) from the first voltage and from the plurality of voltage and current measurements; determining a resistance value as the average of the calculated resistance values and an associated standard deviation; determining an absolute uncertainty on the value of the resistance as the product of the standard deviation and of a Student coefficient; if the relative uncertainty is less than or equal to a predetermined accuracy threshold, validating the resistance value (R).Type: ApplicationFiled: July 19, 2011Publication date: January 26, 2012Applicants: INSTITUT NATIONAL POLYTECHNIQUE DE LORRAINE, SAFTInventors: Ali ZENATI, Philippe DESPREZ, Gerard BARRAILH, Hubert RAZIK, Stephane RAEL
-
Publication number: 20110307202Abstract: The invention is a monitoring system for a battery having a plurality of accumulators. The system comprises means for measuring the voltage on the terminals of each accumulator, means for measuring the temperature of the battery, means for measuring the current flowing through the battery, means for calculating a voltage difference between a maximum voltage measured on the terminals of one of the accumulators and a minimum voltage measured on the terminals of one of the accumulators, means for comparing the voltage difference with at least one threshold value depending on the measured temperature and current, and means reporting an error if the voltage difference is greater than or equal to said at least one threshold value.Type: ApplicationFiled: June 14, 2011Publication date: December 15, 2011Applicant: SAFTInventors: Sebastien BENJAMIN, Philippe Desprez, Gerard Barrailh, Philippe Laflaquiere
-
Patent number: 7940027Abstract: 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: GrantFiled: October 19, 2007Date of Patent: May 10, 2011Assignee: Saft Groupe SAInventors: Philippe Desprez, Gerard Barrailh, Sebastien Benjamin
-
Publication number: 20090091296Abstract: 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: ApplicationFiled: October 19, 2007Publication date: April 9, 2009Applicant: SAFT GROUPE SAInventors: Philippe DESPREZ, Gerard BARRAILH, Sebastien BENJAMIN
-
Patent number: 6777917Abstract: The present invention relates to a method of and a system for charging at least one supercapacitor that is particularly suitable for balancing supercapacitors.Type: GrantFiled: June 17, 2002Date of Patent: August 17, 2004Assignee: AlcatelInventors: Philippe Desprez, Gérard Barrailh, Pascal Lavaur, Stéphane Raël, Fadi Sharif, Bernard Davat
-
Patent number: 6664766Abstract: The present invention relates to a supercapacitor balancing method including bypassing the current flowing in the supercapacitor from a predetermined threshold voltage at the terminals of the supercapacitor, the bypass current being a function of the voltage at the terminals of the supercapacitor and increasing continuously as a function of the voltage. The method is characterized in that the bypass current increases between the threshold voltage, for which the bypass current constitutes a minimum bypass current, and a reference voltage, for which the bypass current constitutes a nominal bypass current, and in that the difference between the reference voltage and the threshold voltage is less than 200 mV and the ratio between the nominal bypass current and the minimum bypass current is greater than 100.Type: GrantFiled: June 17, 2002Date of Patent: December 16, 2003Assignee: AlcatelInventors: Philippe Desprez, Gérard Barrailh, Damien Rochard, Stéphane Raël, Fadi Sharif, Bernard Davat
-
Publication number: 20030062876Abstract: The present invention relates to a supercapacitor balancing method including bypassing the current flowing in the supercapacitor from a predetermined threshold voltage at the terminals of the supercapacitor, the bypass current being a function of the voltage at the terminals of the supercapacitor and increasing continuously as a function of the voltage.Type: ApplicationFiled: June 17, 2002Publication date: April 3, 2003Applicant: ALCATELInventors: Philippe Desprez, Gerard Barrailh, Damien Rochard, Stephane Rael, Fadi Sharif, Bernard Davat
-
Publication number: 20030020435Abstract: The present invention relates to a method of and a system for charging at least one supercapacitor that is particularly suitable for balancing supercapacitors.Type: ApplicationFiled: June 17, 2002Publication date: January 30, 2003Applicant: ALCATELInventors: Philippe Desprez, Gerard Barrailh, Pascal Lavaur, Stephane Rael, Fadi Sharif, Bernard Davat