Patents by Inventor Anantharaman Subbaraman
Anantharaman Subbaraman 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: 12081060Abstract: A method and system for charging a battery (e.g., including but not limited to lithium-ion batteries). The method may comprise: iteratively determining a plurality of charge profiles of the battery; based on the plurality of charge profiles, iteratively determining swelling of the battery; and adjusting a charge current during a subsequent charging of the battery.Type: GrantFiled: September 11, 2020Date of Patent: September 3, 2024Assignee: Robert Bosch GmbHInventors: Anantharaman Subbaraman, Camille Usubelli, Michael Metzger, Farshad Ramezan Pour Safaei, Münir Besli, Nikhil Ravi
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Patent number: 11342594Abstract: Battery management systems and methods for use with lithium-ion batteries that employ silicon-based negative electrodes. The battery management systems and methods consider the lithiation/delithiation properties of silicon-based anode materials by considering voltage relaxation behavior. The battery management systems and methods may also be applied to other materials that similarly display an apparent hysteresis in the lithiation/delithiation processes and/or form multiple phases with different electrochemical properties.Type: GrantFiled: November 29, 2019Date of Patent: May 24, 2022Assignee: Robert Bosch GmbHInventors: Anantharaman Subbaraman, Yelena Gorlin, Camille Usubelli, Rebecca Wilhelm, Farshad Ramezan Pour Safaei, Reinhardt Klein
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Publication number: 20220085635Abstract: A method and system for charging a battery (e.g., including but not limited to lithium-ion batteries). The method may comprise: iteratively determining a plurality of charge profiles of the battery; based on the plurality of charge profiles, iteratively determining swelling of the battery; and adjusting a charge current during a subsequent charging of the battery.Type: ApplicationFiled: September 11, 2020Publication date: March 17, 2022Inventors: Anantharaman SUBBARAMAN, Camille USUBELLI, Michael METZGER, Farshad Ramezan Pour SAFAEI, Münir BESLI, Nikhil RAVI
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Patent number: 11251472Abstract: A battery includes an electrode that exhibits a crystal structure change when lithiated beyond a threshold potential and a battery management system. The battery management system includes a controller configured to, while the battery is online, determine the threshold potential, determine battery operating parameters based on the determined threshold potential, and operate the battery based on the determined battery operating parameters.Type: GrantFiled: June 14, 2019Date of Patent: February 15, 2022Assignee: Robert Bosch GmbHInventors: Yelena Gorlin, John F. Christensen, Anantharaman Subbaraman, Reinhardt Klein
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Patent number: 11243258Abstract: A method, system, and non-transitory computer readable medium for determining a pseudo-optimal charging algorithm for a specific battery are disclosed. An electrochemical battery model is characterized based on the physical characteristics of a specific battery. An optimal charging profile is determined for the specific battery using the highly accurate electrochemical battery model. A pseudo-optimal charging profile is determined which closely approximates the optimal charging profile. However, the pseudo-optimal charging profile is comprised of simple building blocks which are easily and efficiently implemented in embedded applications having limited computational power/memory. An optimization process is used to determine optimal control parameters for the simple building blocks, trigger conditions and thresholds, and adaptation parameters for adapting the pseudo-optimal charging profile as the battery ages.Type: GrantFiled: November 13, 2018Date of Patent: February 8, 2022Assignee: Robert Bosch GmbHInventors: Farshad Ramezan Pour Safaei, Anantharaman Subbaraman, Nikhil Ravi, Reinhardt Klein, Gerd Simon Schmidt, Yongfang Cheng
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Publication number: 20210194008Abstract: An electrode configuration for a battery cell includes a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode. The separator includes an electrically conductive protrusion inhibiting layer and a first insulating layer interposed between and electrically insulating the protrusion inhibiting layer from one of the positive and negative electrode.Type: ApplicationFiled: May 28, 2019Publication date: June 24, 2021Inventors: Yelena Gorlin, John F. Christensen, Nathan P. Craig, Georgy Samsonidze, Anantharaman Subbaraman
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Publication number: 20210173012Abstract: A battery management system includes a memory, a current sensor that measures a current flow through a battery to a load, a voltage sensor that measures a voltage level between a first terminal and a second terminal of the battery that are each connected to the load, and the memory, a temperature sensor that measures a temperature level of the battery; and a controller configured to be operatively connected to the current sensor, temperature sensor, and voltage sensor. The controller is configured to receive a measurement of a first current level and a first voltage level and utilize a corrected capacity and corrected open circuit voltage estimate to output an estimated open circuit voltage of the battery as compared to an estimated capacity.Type: ApplicationFiled: December 4, 2019Publication date: June 10, 2021Inventors: Maksim SUBBOTIN, Farshad Ramezan Pour SAFAEI, Anantharaman SUBBARAMAN, Nikhil RAVI, Gerd Simon SCHMIDT, Reinhardt KLEIN, Yumi KONDO, Yongfang CHENG, Jake CHRISTENSEN
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Publication number: 20210167426Abstract: Battery management systems and methods for use with lithium-ion batteries that employ silicon-based negative electrodes. The battery management systems and methods consider the lithiation/delithiation properties of silicon-based anode materials by considering voltage relaxation behavior. The battery management systems and methods may also be applied to other materials that similarly display an apparent hysteresis in the lithiation/delithiation processes and/or form multiple phases with different electrochemical properties.Type: ApplicationFiled: November 29, 2019Publication date: June 3, 2021Inventors: Anantharaman SUBBARAMAN, Yelena GORLIN, Camille USUBELLI, Rebecca WILHELM, Farshad RAMEZAN POUR SAFAEI, Reinhardt KLEIN
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Patent number: 10908219Abstract: A battery system in one embodiment includes a cell with an anode including graphite and a minor active material that displays an apparent thermodynamic hysteresis. A controller is operably connected to a memory which is configured to execute program instructions in the memory to perform a charge of the cell to a first potential, and a discharge of the cell from the first potential to generate a first discharge versus capacity curve. After a second charge of the cell to a second potential and a second discharge of the cell from the second potential to generate a second discharge versus capacity curve, the controller identifies a shift between the first discharge versus capacity curve and the second discharge versus capacity curve and updates a model of the cell based upon the identified shift. The controller then modifies at least one operating parameter of the cell based upon the updated model.Type: GrantFiled: May 20, 2019Date of Patent: February 2, 2021Assignee: Robert Bosch GmbHInventors: Yelena Gorlin, Anantharaman Subbaraman, Reinhardt Klein
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Publication number: 20200371161Abstract: A battery system in one embodiment includes a cell with an anode including graphite and a minor active material that displays an apparent thermodynamic hysteresis. A controller is operably connected to a memory which is configured to execute program instructions in the memory to perform a charge of the cell to a first potential, and a discharge of the cell from the first potential to generate a first discharge versus capacity curve. After a second charge of the cell to a second potential and a second discharge of the cell from the second potential to generate a second discharge versus capacity curve, the controller identifies a shift between the first discharge versus capacity curve and the second discharge versus capacity curve and updates a model of the cell based upon the identified shift. The controller then modifies at least one operating parameter of the cell based upon the updated model.Type: ApplicationFiled: May 20, 2019Publication date: November 26, 2020Inventors: Yelena Gorlin, Anantharaman Subbaraman, Reinhardt Klein
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Publication number: 20200150185Abstract: A method, system, and non-transitory computer readable medium for determining a pseudo-optimal charging algorithm for a specific battery are disclosed. An electrochemical battery model is characterized based on the physical characteristics of a specific battery. An optimal charging profile is determined for the specific battery using the highly accurate electrochemical battery model. A pseudo-optimal charging profile is determined which closely approximates the optimal charging profile. However, the pseudo-optimal charging profile is comprised of simple building blocks which are easily and efficiently implemented in embedded applications having limited computational power/memory. An optimization process is used to determine optimal control parameters for the simple building blocks, trigger conditions and thresholds, and adaptation parameters for adapting the pseudo-optimal charging profile as the battery ages.Type: ApplicationFiled: November 13, 2018Publication date: May 14, 2020Inventors: Farshad Ramezan Pour Safaei, Anantharaman Subbaraman, Nikhil Ravi, Reinhardt Klein, Gerd Simon Schmidt, Yongfang Cheng
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Publication number: 20200006816Abstract: A battery includes an electrode that exhibits a crystal structure change when lithiated beyond a threshold potential and a battery management system. The battery management system includes a controller configured to, while the battery is online, determine the threshold potential, determine battery operating parameters based on the determined threshold potential, and operate the battery based on the determined battery operating parameters.Type: ApplicationFiled: June 14, 2019Publication date: January 2, 2020Inventors: Yelena Gorlin, John F. Christensen, Anantharaman Subbaraman, Reinhardt Klein
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Patent number: 10389151Abstract: A method for charging a battery comprises: measuring a battery voltage with a voltage sensor and a battery current with a current sensor; applying, with a charging circuit, a first charging current to the battery until the measured battery voltage exceeds a predetermined voltage threshold, a magnitude of the first charging current being held at a first constant value; applying, with the charging circuit, in response to the measured battery voltage exceeding the predetermined voltage threshold, a second charging current to the battery until a cutoff criterion is satisfied, a magnitude of the second charging current being such that the battery voltage exceeds a steady state voltage limit for the battery; after the cutoff criterion is satisfied, determining a rest voltage of the battery; and updating the cutoff criterion based on a difference between the determined rest voltage and a target rest voltage.Type: GrantFiled: October 9, 2017Date of Patent: August 20, 2019Assignee: Robert Bosch GmbHInventors: Nikhil Ravi, Anantharaman Subbaraman, Reinhardt Klein, Ashish Krupadanam, Anahita MirTabatabaei, Gerd Simon Schmidt, Christoph Klee
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Patent number: 10312699Abstract: A method for monitoring a battery while the battery is connected to a load has been developed. The method includes measuring a first current level flowing through the battery to the load and a first voltage level of the battery at a first time, generating an estimated open cell voltage (OCV) of the battery at the first time based on the first current level, the first voltage level, and a predetermined model of the battery, identifying a first excitation level of the battery at the first time based on the first voltage level, the first current level and a cost optimization process, and identifying at least one of a state of charge (SoC) and state of health (SoH) of the battery using the estimated OCV only in response to the first excitation level being below a predetermined threshold.Type: GrantFiled: July 31, 2017Date of Patent: June 4, 2019Assignee: Robert Bosch GmbHInventors: Anantharaman Subbaraman, Nikhil Ravi, Reinhardt Klein, Gerd Simon Schmidt, Christopher Mayhew
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Patent number: 10291046Abstract: A method for charging a battery comprises: measuring a battery voltage with a voltage sensor and a battery current with a current sensor; applying, with a charging circuit, a first charging current to the battery until the measured battery voltage exceeds a predetermined voltage threshold, a magnitude of the first charging current being held at a first constant value; applying, with the charging circuit, in response to the measured battery voltage exceeding the predetermined voltage threshold, a second charging current to the battery until a cutoff criterion is satisfied, a magnitude of the second charging current being such that the battery voltage exceeds a steady state voltage limit for the battery; after the cutoff criterion is satisfied, determining a rest voltage of the battery; and updating the cutoff criterion based on a difference between the determined rest voltage and a target rest voltage.Type: GrantFiled: June 19, 2017Date of Patent: May 14, 2019Assignee: Robert Bosch GmbHInventors: Nikhil Ravi, Anantharaman Subbaraman, Reinhardt Klein, Ashish Krupadanam, Anahita MirTabatabaei, Gerd Simon Schmidt, Christoph Klee
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Publication number: 20190036356Abstract: A method for monitoring a battery while the battery is connected to a load has been developed. The method includes measuring a first current level flowing through the battery to the load and a first voltage level of the battery at a first time, generating an estimated open cell voltage (OCV) of the battery at the first time based on the first current level, the first voltage level, and a predetermined model of the battery, identifying a first excitation level of the battery at the first time based on the first voltage level, the first current level and a cost optimization process, and identifying at least one of a state of charge (SoC) and state of health (SoH) of the battery using the estimated OCV only in response to the first excitation level being below a predetermined threshold.Type: ApplicationFiled: July 31, 2017Publication date: January 31, 2019Inventors: Anantharaman Subbaraman, Nikhil Ravi, Reinhardt Klein, Gerd Simon Schmidt, Christopher Mayhew
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Publication number: 20180145527Abstract: A method for charging a battery comprises: measuring a battery voltage with a voltage sensor and a battery current with a current sensor; applying, with a charging circuit, a first charging current to the battery until the measured battery voltage exceeds a predetermined voltage threshold, a magnitude of the first charging current being held at a first constant value; applying, with the charging circuit, in response to the measured battery voltage exceeding the predetermined voltage threshold, a second charging current to the battery until a cutoff criterion is satisfied, a magnitude of the second charging current being such that the battery voltage exceeds a steady state voltage limit for the battery; after the cutoff criterion is satisfied, determining a rest voltage of the battery; and updating the cutoff criterion based on a difference between the determined rest voltage and a target rest voltage.Type: ApplicationFiled: October 9, 2017Publication date: May 24, 2018Inventors: Nikhil Ravi, Anantharaman Subbaraman, Reinhardt Klein, Ashish Krupadanam, Anahita MirTabatabaei, Gerd Simon Schmidt, Christoph Klee
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Publication number: 20180145526Abstract: A method for charging a battery comprises: measuring a battery voltage with a voltage sensor and a battery current with a current sensor; applying, with a charging circuit, a first charging current to the battery until the measured battery voltage exceeds a predetermined voltage threshold, a magnitude of the first charging current being held at a first constant value; applying, with the charging circuit, in response to the measured battery voltage exceeding the predetermined voltage threshold, a second charging current to the battery until a cutoff criterion is satisfied, a magnitude of the second charging current being such that the battery voltage exceeds a steady state voltage limit for the battery; after the cutoff criterion is satisfied, determining a rest voltage of the battery; and updating the cutoff criterion based on a difference between the determined rest voltage and a target rest voltage.Type: ApplicationFiled: June 19, 2017Publication date: May 24, 2018Inventors: Nikhil Ravi, Anantharaman Subbaraman, Reinhardt Klein, Ashish Krupadanam, Anahita MirTabatabaei, Gerd Simon Schmidt, Christoph Klee