Patents by Inventor Venkat Subramanian
Venkat Subramanian 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).
-
Publication number: 20240111668Abstract: Techniques are provided for implementing an in-memory columnar data store that is configured to either grow or shrink in response to performance prediction data generated from database workload information. A system maintains allocations of volatile memory from a given memory area for a plurality of memory-consuming components in a database system. The system receives for each memory-consuming component, performance prediction data that contains performance predictions for a plurality of memory allocation sizes for the memory-consuming components. The system determines a target memory allocation for an in-memory columnar data store based on the performance predictions. The system determines an incrementally adjusted amount of memory for the in-memory columnar data store and causes the incrementally adjusted amount to be allocated to the in-memory columnar data store.Type: ApplicationFiled: September 29, 2023Publication date: April 4, 2024Inventors: Hariharan Lakshmanan, Teck Hua Lee, Vinita Subramanian, Gary Smith, Lijian Wan, Shasank Kisan Chavan, Venkat Raman Senapati
-
Patent number: 11710859Abstract: In some embodiments, a battery management system is provided. The battery management system comprises a connector for electrically coupling a battery to the battery management system, at least one sensor configured to detect a battery state, a programmable chip configured to control at least one of charging and discharging of the battery, and a controller device. The controller device is configured to receive at least one battery state from the at least one sensor; provide the at least one battery state as input to a tanks-in-series model that represents the battery; and provide at least one output of the tanks-in-series model to the programmable chip for controlling at least one of charging and discharging of the battery.Type: GrantFiled: September 23, 2020Date of Patent: July 25, 2023Assignees: University of Washington, BattGenie Inc.Inventors: Akshay Subramaniam, Suryanarayana Kolluri, Caitlin Parke, Manan Pathak, Venkat Subramanian
-
Patent number: 11462929Abstract: Electrochemical models for the lithium-ion battery are useful in predicting and controlling its performance. The values of the parameters in these models are vital to their accuracy. However, not all parameters can be measured precisely, especially when destructive methods are prohibited. In some embodiments of the present disclosure, a parameter estimation approach is used to estimate the open circuit potential of the positive electrode (Up) using piecewise linear approximation together with all the other parameters of a single particle model. Up and 10 more parameters may be estimated from a single discharge curve without knowledge of the electrode chemistry using a technique such as a genetic algorithm. Different case studies were presented for estimating Up with different types of parameters of the battery model. The estimated parameters were then validated by comparing simulations at different discharge rates with experimental data.Type: GrantFiled: October 4, 2017Date of Patent: October 4, 2022Assignee: UNIVERSITY OF WASHINGTONInventors: Yanbo Qi, Suryanarayana Kolluri, Venkat Subramanian, Sung-Yuan Chen, Neal Dawson-Elli
-
Publication number: 20210091418Abstract: In some embodiments, a battery management system is provided. The battery management system comprises a connector for electrically coupling a battery to the battery management system, at least one sensor configured to detect a battery state, a programmable chip configured to control at least one of charging and discharging of the battery, and a controller device. The controller device is configured to receive at least one battery state from the at least one sensor; provide the at least one battery state as input to a tanks-in-series model that represents the battery; and provide at least one output of the tanks-in-series model to the programmable chip for controlling at least one of charging and discharging of the battery.Type: ApplicationFiled: September 23, 2020Publication date: March 25, 2021Applicants: University of Washington, BattGenie Inc.Inventors: Akshay Subramaniam, Suryanarayana Kolluri, Caitlin Parke, Manan Pathak, Venkat Subramanian
-
Patent number: 10769236Abstract: Battery models using robust fail-safe iteration free approach for solving Differential Algebraic Equations, and associated systems and methods are disclosed. In one embodiment, a method includes generating a model of the rechargeable battery; determining one or more initial conditions for one or more algebraic variables of the model using a solver; holding differential variables of the model static by a switch function while determining the one or more initial conditions; applying the initial conditions to the model by the switch function; and determining one or more parameters for the rechargeable battery by solving the algebraic and differential equations.Type: GrantFiled: July 20, 2016Date of Patent: September 8, 2020Assignees: University of Washington, Washington UniversityInventors: Dayaram Sonawane, Manan Pathak, Venkat Subramanian, Matthew Lawder
-
Patent number: 10037395Abstract: A computer-implemented method for modeling the amount of current discharged by a battery is provided. The method is implemented by a computing device communicatively coupled with a memory, and includes generating, by the computing device, a model of at least one battery cell comprising a positive electrode region, a negative electrode region, and a separator region. The method also includes transforming the positive electrode region, the negative electrode region, and the separator region of the battery into a single region in the model. In addition, the method includes generating, by the computing device, a plurality of trial functions associated with the single region, and determining, by the computing device, the amount of current discharged from the battery cell based on the trial functions.Type: GrantFiled: November 13, 2013Date of Patent: July 31, 2018Assignee: Washington UniversityInventors: Venkat Subramanian, Venkatasailanathan Ramdesigan, Paul Northrop, Sumitava De, Bharat Kumar Suthar, Matthew Lawder
-
Publication number: 20180210861Abstract: Battery models using robust fail-safe iteration free approach for solving Differential Algebraic Equations, and associated systems and methods are disclosed. In one embodiment, a method includes generating a model of the rechargeable battery; determining one or more initial conditions for one or more algebraic variables of the model using a solver; holding differential variables of the model static by a switch function while determining the one or more initial conditions; applying the initial conditions to the model by the switch function; and determining one or more parameters for the rechargeable battery by solving the algebraic and differential equations.Type: ApplicationFiled: July 20, 2016Publication date: July 26, 2018Applicants: University of Washington, Washington UniversityInventors: Dayaram Sonawane, Manan Pathak, Venkat Subramanian, Matthew Lawder
-
Publication number: 20180097396Abstract: Electrochemical models for the lithium-ion battery are useful in predicting and controlling its performance. The values of the parameters in these models are vital to their accuracy. However, not all parameters can be measured precisely, especially when destructive methods are prohibited. In some embodiments of the present disclosure, a parameter estimation approach is used to estimate the open circuit potential of the positive electrode (Up) using piecewise linear approximation together with all the other parameters of a single particle model. Up and 10 more parameters may be estimated from a single discharge curve without knowledge of the electrode chemistry using a technique such as a genetic algorithm. Different case studies were presented for estimating Up with different types of parameters of the battery model. The estimated parameters were then validated by comparing simulations at different discharge rates with experimental data.Type: ApplicationFiled: October 4, 2017Publication date: April 5, 2018Applicant: University of WashingtonInventors: Yanbo Qi, Suryanarayana Kolluri, Venkat Subramanian, Sung-Yuan Chen
-
Publication number: 20160312633Abstract: The present application provides composite seals for reducing leakages between adjacent components of turbomachinery. The composite seals may include a metallic shim, a metallic support structure and a ceramic, glass or enamel coating. The shim and the support structure may be bonded or fused together. The support structure may include internal voids or gaps, and the coating may be applied to the shim and the support structure such that the coating is provided within the voids or gaps of the support structure, between portions of the support structure and the shim, and substantially over the outer surface of the support structure. The support structure may thereby provide a mechanical attachment between the shim and the coating. In use, the coating provides thermal and/or chemical insulation to the metallic shim and the support structure of the seal.Type: ApplicationFiled: April 24, 2015Publication date: October 27, 2016Applicant: GENERAL ELECTRIC COMPANYInventors: Edip SEVINCER, Neelesh Nandkumar SARAWATE, Anthony MARIN, Venkat Subramanian VENKATARAMANI
-
Publication number: 20140136169Abstract: A computer-implemented method for modeling the amount of current discharged by a battery is provided. The method is implemented by a computing device communicatively coupled with a memory, and includes generating, by the computing device, a model of at least one battery cell comprising a positive electrode region, a negative electrode region, and a separator region. The method also includes transforming the positive electrode region, the negative electrode region, and the separator region of the battery into a single region in the model. In addition, the method includes generating, by the computing device, a plurality of trial functions associated with the single region, and determining, by the computing device, the amount of current discharged from the battery cell based on the trial functions.Type: ApplicationFiled: November 13, 2013Publication date: May 15, 2014Inventors: Venkat Subramanian, Venkatasailanathan Ramdesigan, Paul Northrop, Sumitava De, Bharat Kumar Suthar, Matthew Lawder
-
Publication number: 20130297414Abstract: An apparatus, computer-readable medium, and computer-implemented method for managing mobile payment transactions includes receiving transaction data from a mobile device of a merchant, the transaction data including payment card information associated with a customer and transaction details information relating to the transaction, and the payment card information being captured with the mobile device of the merchant, storing a transaction record including the transaction details information in an online merchant account registered to the merchant, the online merchant account storing transaction records associated with the merchant, and providing access to the transaction records through the online merchant account.Type: ApplicationFiled: March 15, 2013Publication date: November 7, 2013Applicant: FLINT MOBILE, INC.Inventors: Greg Goldfarb, Paulo Ferreira, Sergei Gouzeev, Zachary Nelson, Dan Nieuwland, Venkat Subramanian, Gary Gippetti, Ben Flores
-
Publication number: 20100291302Abstract: A protected article is prepared by providing the article, depositing a bond coat onto an exposed surface of the article, and producing a thermal barrier coating on an exposed surface of the bond coat. The step of producing the thermal barrier coating includes the steps of depositing a primary ceramic coating onto an exposed surface of the bond coat, and depositing a stabilization composition onto an exposed surface of the primary ceramic coating. The stabilization composition includes a first element selected from Group 2 or Group 3 of the periodic table, and a second element selected from Group 5 of the periodic table. The atomic ratio of the amount of the first element to the amount of the second element is at least 1.3, more preferably at least 1:1.Type: ApplicationFiled: March 12, 2007Publication date: November 18, 2010Applicant: GENERAL ELECTRIC COMPANYInventors: John Frederick Ackerman, Venkat Subramanian Venkataramani, Irene T. Spitsberg, Brett Allen Rohrer Boutwell, Ramgopal Darolia
-
Publication number: 20100134286Abstract: A radio frequency based sensor is provided. The sensor comprises a radio frequency identification tag having a substrate, where the radio frequency identification tag generates an associated electromagnetic field. The sensor further includes an analyte recognition element in operative association with the substrate, where the analyte recognition element is capable of binding to a target analyte, and a signal amplification entity coupled to the analyte recognition element, where the signal amplification entity facilitates change in electromagnetic field in presence of the target analyte.Type: ApplicationFiled: December 1, 2008Publication date: June 3, 2010Applicant: General Electric CompanyInventors: Radislav Alexandrovich Potyrailo, Venkat Subramanian Venkataramani, William Guy Morris
-
Patent number: 7364802Abstract: Ceramic compositions comprising at least about 91 mole % zirconia and up to about 9 mole % of a stabilizer component comprising a first metal oxide having selected from the group consisting of yttria, calcia, ceria, scandia, magnesia, india and mixtures thereof. This stabilizer component further comprises a second metal oxide of a trivalent metal atom selected from the group consisting of lanthana, gadolinia, neodymia, samaria, dysprosia, erbia, ytterbia, and mixtures thereof. These ceramic compositions are useful in preparing thermal barrier coatings having reduced thermal conductivity for the metal substrate of articles that operate at, or are exposed to, high temperatures.Type: GrantFiled: December 30, 2003Date of Patent: April 29, 2008Assignee: General Electric CompanyInventors: Irene Spitsberg, Venkat Subramanian Venkataramani, Brett Allen Boutwell, Mark Daniel Gorman, Robert William Bruce
-
Patent number: 6960395Abstract: Ceramic compositions comprising at least about 91 mole % zirconia and up to about 9 mole % of a stabilizer component comprising a first metal oxide having selected from the group consisting of yttria, calcia, ceria, scandia, magnesia, india and mixtures thereof. This stabilizer component further comprises a second metal oxide of a trivalent metal atom selected from the group consisting of lanthana, gadolinia, neodymia, samaria, dysprosium, and mixtures thereof and a third metal oxide of a trivalent metal atom selected from the group consisting of erbia, ytterbia and mixtures thereof. These ceramic compositions are useful in preparing thermal barrier coatings having reduced thermal conductivity for the metal substrate of articles that operate at, or are exposed to, high temperatures.Type: GrantFiled: December 30, 2003Date of Patent: November 1, 2005Assignee: General Electric CompanyInventors: Irene Spitsberg, Venkat Subramanian Venkataramani, Brett Allen Boutwell, Mark Daniel Gorman
-
Patent number: 6858334Abstract: Zirconia-containing ceramic compositions having a c/a ratio of the zirconia lattice in the range of from about 1.005 to about 1.016. These compositions comprise a stabilizing amount up to about 10 mole % of the composition of a stabilizer component which comprises: (1) a first metal oxide selected from the group consisting of yttria, calcia, ceria, scandia, magnesia, india and mixtures thereof in an amount of from about 1.5 to about 6 mole % of the composition of; (2) a second metal oxide selected from the group consisting of lanthana, neodymia and mixtures thereof in an amount of from about 0.5 to about 4 mole % of the composition; and (3) optionally ytterbia in an amount of from about 0.5 to about 4 mole % of the composition. These compositions further comprise hafnia in an amount of from about 0.5 to about 15 mole % of the composition; and optionally tantala in an amount of from about 0.5 to about 1.5 mole % of the composition.Type: GrantFiled: December 30, 2003Date of Patent: February 22, 2005Assignee: General Electric CompanyInventors: Mark Daniel Gorman, Irene Spitsberg, Brett Allen Boutwell, Ramgopal Darolia, Robert William Bruce, Venkat Subramanian Venkataramani, Anthony Mark Thompson, Antonio Mogro-Campera