Patents by Inventor Angel Zhivkov Kirchev
Angel Zhivkov Kirchev 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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Publication number: 20230184846Abstract: Method for diagnosing and predicting the lifespan of lead-based batteries, especially lead-based batteries intended to store standby power. The invention essentially consists in a new method for diagnosing lead-acid batteries and advantageously for estimating their remaining lifespans, the batteries more particularly being intended for standby storage applications. The method is based on a combination of continuous monitoring measurements with integration of the over-charging current (computation of the over-charging Ah applied to the battery from its installation) and of periodic measurements under DC current of the internal resistance of the battery using short discharging periods with a constant current or a constant power.Type: ApplicationFiled: December 14, 2022Publication date: June 15, 2023Applicant: COMMISSARIAT À L'ÉNERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVESInventors: Angel Zhivkov KIRCHEV, Nicolas GUILLET, Lionel SERRA
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Patent number: 10067086Abstract: A method recalibrates in situ a comparison electrode integrated into an electrochemical system. The electrochemical system includes a working electrode, a counter electrode, and an electrolyte. The method includes verifying a potential of the comparison electrode relative to the working electrode or to the counter electrode in situ, detecting whether there is a drift in the potential of the comparison electrode relative to a potential plateau for which the comparison electrode was functionalized or designed, and when the drift is detected, recalibrating the comparison electrode in situ.Type: GrantFiled: November 14, 2014Date of Patent: September 4, 2018Assignee: RENAULT s.a.s.Inventors: Sylvie Genies, Melanie Alias, Sylvain Leirens, Angel Zhivkov Kirchev
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Publication number: 20170155171Abstract: An electrochemical lead-acid accumulator includes negative and positive electrodes. The negative electrode has a current collector formed from a carbon sheet having a thickness between 50 and 200 ?m; first and second lead-based layers respectively covering first and second faces of the carbon sheet; and first and second layers of a lead-containing active material, having a thickness between 100 and 500 ?m, and arranged on either side of the carbon sheet, respectively on first and second lead-based layers. The positive electrode has a current collector formed from a titanium sheet having a thickness between 50 and 250 ?m; first and second electrically conducting metal oxide layers, respectively covering first and second faces of the titanium sheet; and first and second layers of a lead-containing active material, having a thickness comprised between 100 and 500 ?m, arranged on either side of the titanium sheet, respectively on first and second metal oxide layers.Type: ApplicationFiled: May 29, 2015Publication date: June 1, 2017Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Angel Zhivkov KIRCHEV, Marion PERRIN
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Publication number: 20160290959Abstract: A method recalibrates in situ a comparison electrode integrated into an electrochemical system. The electrochemical system includes a working electrode, a counter electrode, and an electrolyte. The method includes verifying a potential of the comparison electrode relative to the working electrode or to the counter electrode in situ, detecting whether there is a drift in the potential of the comparison electrode relative to a potential plateau for which the comparison electrode was functionalized or designed, and when the drift is detected, recalibrating the comparison electrode in situ.Type: ApplicationFiled: November 14, 2014Publication date: October 6, 2016Applicant: RENAULT S.A.SInventors: Sylvie GENIES, Melanie ALIAS, Sylvain LEIRENS, Angel Zhivkov KIRCHEV
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Patent number: 9368802Abstract: A method of producing a gaseous diffusion electrode, including the provision of a stack comprising successively a diffusion layer for a gas, a catalytic layer and a diffusion layer for an electrolyte, the deformation of the stack in such a way as to place opposite one another first and second portions of one of the two diffusion layers, and the bonding of the first and second portions with the aid of a polymer material. A gaseous diffusion electrode is furnished with a stack comprising successively a diffusion layer for a gas, a catalytic layer and a diffusion layer for an electrolyte. Two portions of one of the two diffusion layers are disposed opposite one another and separated by a first layer of polymer material.Type: GrantFiled: June 22, 2012Date of Patent: June 14, 2016Assignee: COMMISSARIAT À L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventor: Angel Zhivkov Kirchev
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Patent number: 9255974Abstract: A determination of particular parameters for modeling a battery such as a lithium-ion battery, for example the charge transfer resistance and the double layer behavior at the surface of electrical connections, by extrapolating results obtained in a stationary mode, for example without charge or discharge current, to quick charge or discharge modes, where traditional measurements are too slow, since the parameters vary as a function of the charge or discharge state.Type: GrantFiled: July 26, 2010Date of Patent: February 9, 2016Assignee: Commissariat à l'énergie atomique et aux énergies alternativesInventors: Trung-Kien Dong, Angel Zhivkov Kirchev, Florence Mattera
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Publication number: 20150180088Abstract: The present invention relates to an electrochemical lead battery comprising at least one electrochemical cell comprising a positive electrode comprising lead oxide PbO2 and a negative electrode comprising lead metal separated by an electrolyte comprising methanesulfonic acid and at least one lead salt, characterized in that said electrolyte further comprises fluoride ions.Type: ApplicationFiled: July 18, 2013Publication date: June 25, 2015Inventors: Alexandre Oury, Yann Bultel, Angel Zhivkov Kirchev
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Publication number: 20140120429Abstract: A method of producing a gaseous diffusion electrode, including the provision of a stack comprising successively a diffusion layer for a gas, a catalytic layer and a diffusion layer for an electrolyte, the deformation of the stack in such a way as to place opposite one another first and second portions of one of the two diffusion layers, and the bonding of the first and second portions with the aid of a polymer material. A gaseous diffusion electrode is furnished with a stack comprising successively a diffusion layer for a gas, a catalytic layer and a diffusion layer for an electrolyte. Two portions of one of the two diffusion layers are disposed opposite one another and separated by a first layer of polymer material.Type: ApplicationFiled: June 22, 2012Publication date: May 1, 2014Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventor: Angel Zhivkov Kirchev
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Patent number: 8609267Abstract: An electrochemical cell comprises an inlet and an outlet for an electrolyte flow, and two unipolar electrodes. Each electrode comprises a structure with a network of through-passages, surrounded by a solid frame. The electrolyte enters via inlets, circulates via the passages of the electrodes, passes through the space between the electrodes and leaves via an outlet. The structure and the frame are based on carbon.Type: GrantFiled: March 23, 2010Date of Patent: December 17, 2013Assignee: Comissariat a l'Energie Atomique et aux Energies AlternativesInventors: Angel Zhivkov Kirchev, Nina Kircheva
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Patent number: 8589097Abstract: A method for diagnosing the state of health of a battery includes, determining a first state-of-charge value from the battery voltage during partial discharge at constant current, determining a second state-of-charge value from the open circuit voltage of the battery, and calculating the state of health from the difference between the first and second state-of-charge values.Type: GrantFiled: January 26, 2011Date of Patent: November 19, 2013Assignee: Commissariat a l'Energie Atomique et aux Energies AlternativesInventor: Angel Zhivkov Kirchev
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Patent number: 8466685Abstract: The method includes the simultaneous measurement of the current I, of the positive plate potential V+, and of the temperature T at the positive terminal of the battery, the determination of a temperature compensated value Vc+ of the positive plate potential and the use of the temperature compensated value Vc+ for estimation of the state of charge. This method is more particularly used for estimation of the state of charge of an alkaline battery having a NiOOH positive plate.Type: GrantFiled: May 7, 2008Date of Patent: June 18, 2013Assignee: Commissariat a l'Energie Atomique et aux Energies AlternativesInventor: Angel Zhivkov Kirchev
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Publication number: 20130105308Abstract: A reference electrode includes a reference electrolyte and a proton exchange membrane arranged to separate the reference electrolyte from a medium external to the electrode. The proton-exchange membrane comprises acid-doped polyaniline. The acid-doped polyaniline is in the form of particles distributed in a bonding polymer material.Type: ApplicationFiled: July 12, 2011Publication date: May 2, 2013Inventors: Angel Zhivkov Kirchev, Bernard Diem, Florence Mattera
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Publication number: 20120296586Abstract: A method for diagnosing the state of health of a battery includes, determining a first state-of-charge value from the battery voltage during partial discharge at constant current, determining a second state-of-charge value from the open circuit voltage of the battery, and calculating the state of health from the difference between the first and second state-of-charge values.Type: ApplicationFiled: January 26, 2011Publication date: November 22, 2012Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventor: Angel Zhivkov Kirchev
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Patent number: 8268148Abstract: A reference electrode having a casing with an inner cavity successively filled with a paste constituting an active material and a porous material impregnated with an electrolyte solution. The projecting end of a silver wire is embedded in the paste at the bottom of the inner cavity. The paste is constituted of a powder of a silver compound and of the alkaline electrolyte solution. The silver compound is any insoluble silver salt or oxide containing the negative ion of the electrolyte solution. The impregnated porous material is preferably constituted by a plurality of mat separator pieces mechanically and compressed by a closing plug, closing the inner cavity and forming a porous liquid junction.Type: GrantFiled: June 25, 2007Date of Patent: September 18, 2012Assignee: Commissariat a l'energie AtomiqueInventor: Angel Zhivkov Kirchev
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Publication number: 20120130662Abstract: A determination of particular parameters for modeling a battery such as a lithium-ion battery, for example the charge transfer resistance and the double layer behavior at the surface of electrical connections, by extrapolating results obtained in a stationary mode, for example without charge or discharge current, to quick charge or discharge modes, where traditional measurements are too slow, since the parameters vary as a function of the charge or discharge state.Type: ApplicationFiled: July 26, 2010Publication date: May 24, 2012Applicant: Commissariat a l'energie atomique et aux ene altInventors: Trung-Kien Dong, Angel Zhivkov Kirchev, Florence Mattera
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Patent number: 8173300Abstract: A structure including a network of parallel, homogeneous pores extending through the structure, and an outer frame around the lateral faces of the structure. The structure and the frame are made of carbon. The electrode is covered by a layer based on lead. The pores are filled with an active material based on lead.Type: GrantFiled: March 23, 2010Date of Patent: May 8, 2012Assignee: Commissariat a l'Energie AtomiqueInventors: Angel Zhivkov Kirchev, Nina Kircheva
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Publication number: 20120003543Abstract: A structure including a network of parallel, homogeneous pores extending through the structure, and an outer frame around the lateral faces of the structure. The structure and the frame are made of carbon. The electrode is covered by a layer based on lead. The pores are filled with an active material based on lead.Type: ApplicationFiled: March 23, 2010Publication date: January 5, 2012Applicant: Commissariat A L'Energie Atomique Et Aux Energies AlternativesInventors: Angel Zhivkov Kirchev, Nina Kircheva
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Publication number: 20110318617Abstract: An electrochemical cell comprises an inlet and an outlet for an electrolyte flow, and two unipolar electrodes. Each electrode comprises a structure with a network of through-passages, surrounded by a solid frame. The electrolyte enters via inlets, circulates via the passages of the electrodes, passes through the space between the electrodes and leaves via an outlet. The structure and the frame are based on carbon.Type: ApplicationFiled: March 23, 2010Publication date: December 29, 2011Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Angel Zhivkov Kirchev, Nina Kircheva
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Publication number: 20110083966Abstract: An electrode for lead-battery comprises a current collector covered by an active layer of lead-containing paste. The current is formed by a glassy carbon substrate on which is deposited an intermediate layer. The glassy carbon substrate has preferably a thickness comprised between 1 mm and 3 mm whereas the thickness of the intermediate layer is advantageously comprised between 50 ?m and 200 ?m. In a particular embodiment, the glassy carbon substrate is in form of a comb.Type: ApplicationFiled: June 9, 2008Publication date: April 14, 2011Applicant: COMMISSARIAT A L 'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventor: Angel Zhivkov Kirchev
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Publication number: 20110043212Abstract: The method includes the simultaneous measurement of the current I, of the positive plate potential V+, and of the temperature T at the positive terminal of the battery, the determination of a temperature compensated value Vc+ of the positive plate potential and the use of the temperature compensated value Vc+ for estimation of the state of charge. This method is more particularly used for estimation of the state of charge of an alkaline battery having a NiOOH positive plate.Type: ApplicationFiled: May 7, 2008Publication date: February 24, 2011Applicant: Commissariat A L'Energie Atomique Et Aux Energies AlternativesInventor: Angel Zhivkov Kirchev