Patents by Inventor Zachary D. Bylsma
Zachary D. Bylsma 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: 9395327Abstract: A battery system may include a plurality of subdivisions, such as battery cells or sub-packs. A measurement system configured to determine a subdivision electrical parameter associated with each of a plurality of subdivisions. A battery control may identify a subdivision satisfying a criterion based on the plurality of subdivision electrical parameters. According to some embodiments, the battery control system may determine a ratio of the subdivision electrical parameter of the identified subdivision to the electrical parameter of the battery pack. The ratio may be used to scale the electrical parameter associated with the battery pack by the ratio. According to other embodiments, the subdivision electrical parameter associated with the identified subdivision may be provided to a battery state estimation system. The scaled electrical parameter or the electrical parameter associated with the identified subdivision may be used by a battery state estimation system to generate an estimated battery state.Type: GrantFiled: November 30, 2012Date of Patent: July 19, 2016Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Robert C. Baraszu, Kurt M. Johnson, Zachary D. Bylsma, Damon R. Frisch, Wei Liu, David S. Maxwell
-
Patent number: 9190853Abstract: Methods and systems for adjusting the voltage limits of a battery. In some implementations, voltage data may be received from each of a plurality of battery sections of a vehicle battery. A voltage offset for the vehicle battery may be calculated using the voltage data. The voltage offset may be calculated by determining a difference between an average voltage taken from each of the plurality of battery sections and at least one of a minimum voltage of all of the battery cells and an average cell voltage from a battery section having the lowest average cell voltage. The voltage offset may be applied to dynamically adjust a voltage limit associated with the vehicle battery so as to prevent any of the battery cells in the vehicle battery from exceeding the voltage limit.Type: GrantFiled: July 25, 2013Date of Patent: November 17, 2015Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Kurt M. Johnson, Robert C. Baraszu, Zachary D. Bylsma, Ashley McAllister, George Robison
-
Patent number: 9128159Abstract: A method for estimating charge capacity of a lithium iron-phosphate battery pack using data from a plug-in charge event. A laboratory-measured battery pack resistance, which is known to remain constant over a battery pack's life, can be used to determine open circuit voltage from terminal voltage during charging. Actual open circuit voltage after charging can be measured later, after the battery pack has rested for a sufficient amount of time. The two values of open circuit voltage, if taken at points on the battery pack's SOC-OCV curve which have great enough slope, provide two values of battery pack state of charge. By integrating charging current over the time interval between the two open circuit voltage readings, and using the two state of charge values, the battery pack capacity can be determined from the plug-in charge data.Type: GrantFiled: December 12, 2012Date of Patent: September 8, 2015Assignee: GM Global Technology Operations LLCInventors: Christopher W. Mousseau, Michael Wahlstrom, Zachary D. Bylsma
-
Patent number: 9065278Abstract: Systems and methods for estimating the relative capacity of individual battery subdivisions in a battery system are presented. In some embodiments, a system may include calculation system configured to analyze the electrical parameters to generate derivative values of the parameters over a period of time. The calculation system may further calculate summation values associated with individual battery subdivisions based upon the derivate values. A battery control system may utilize the summation values to generate one or more commands configured to control an aspect of an operation of the battery pack based on using the summation values. The summation values associated with battery subdivisions may be used to determine a relative capacity for storing electrical energy, according to some embodiments. The determination of relative capacity may be used by a control system to prevent over-discharge of a battery subdivision having the lowest energy storage capacity.Type: GrantFiled: January 22, 2013Date of Patent: June 23, 2015Assignee: GM Global Technology Operations LLCInventors: Robert C. Baraszu, Kurt M. Johnson, Zachary D. Bylsma, Damon R. Frisch, George Robison, Ashley McAllister
-
Publication number: 20150028814Abstract: Methods and systems for adjusting the voltage limits of a battery. In some implementations, voltage data may be received from each of a plurality of battery sections of a vehicle battery. A voltage offset for the vehicle battery may be calculated using the voltage data. The voltage offset may be calculated by determining a difference between an average voltage taken from each of the plurality of battery sections and at least one of a minimum voltage of all of the battery cells and an average cell voltage from a battery section having the lowest average cell voltage. The voltage offset may be applied to dynamically adjust a voltage limit associated with the vehicle battery so as to prevent any of the battery cells in the vehicle battery from exceeding the voltage limit.Type: ApplicationFiled: July 25, 2013Publication date: January 29, 2015Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: KURT M. JOHNSON, ROBERT C. BARASZU, ZACHARY D. BYLSMA, ASHLEY MCALLISTER, GEORGE ROBISON
-
Publication number: 20140203785Abstract: Systems and methods for estimating the relative capacity of individual battery subdivisions in a battery system are presented. In some embodiments, a system may include calculation system configured to analyze the electrical parameters to generate derivative values of the parameters over a period of time. The calculation system may further calculate summation values associated with individual battery subdivisions based upon the derivate values. A battery control system may utilize the summation values to generate one or more commands configured to control an aspect of an operation of the battery pack based on using the summation values. The summation values associated with battery subdivisions may be used to determine a relative capacity for storing electrical energy, according to some embodiments. The determination of relative capacity may be used by a control system to prevent over-discharge of a battery subdivision having the lowest energy storage capacity.Type: ApplicationFiled: January 22, 2013Publication date: July 24, 2014Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: ROBERT C. BARASZU, KURT M. JOHNSON, ZACHARY D. BYLSMA, DAMON R. FRISCH, GEORGE ROBISON, ASHLEY MCALLISTER
-
Publication number: 20140163853Abstract: A method for estimating charge capacity of a lithium iron-phosphate battery pack using data from a plug-in charge event. A laboratory-measured battery pack resistance, which is known to remain constant over a battery pack's life, can be used to determine open circuit voltage from terminal voltage during charging. Actual open circuit voltage after charging can be measured later, after the battery pack has rested for a sufficient amount of time. The two values of open circuit voltage, if taken at points on the battery pack's SOC-OCV curve which have great enough slope, provide two values of battery pack state of charge. By integrating charging current over the time interval between the two open circuit voltage readings, and using the two state of charge values, the battery pack capacity can be determined from the plug-in charge data.Type: ApplicationFiled: December 12, 2012Publication date: June 12, 2014Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Christopher W. Mousseau, Michael Wahlstrom, Zachary D. Bylsma
-
Publication number: 20140152317Abstract: A battery system may include a plurality of subdivisions, such as battery cells or sub-packs. A measurement system configured to determine a subdivision electrical parameter associated with each of a plurality of subdivisions. A battery control may identify a subdivision satisfying a criterion based on the plurality of subdivision electrical parameters. According to some embodiments, the battery control system may determine a ratio of the subdivision electrical parameter of the identified subdivision to the electrical parameter of the battery pack. The ratio may be used to scale the electrical parameter associated with the battery pack by the ratio. According to other embodiments, the subdivision electrical parameter associated with the identified subdivision may be provided to a battery state estimation system. The scaled electrical parameter or the electrical parameter associated with the identified subdivision may be used by a battery state estimation system to generate an estimated battery state.Type: ApplicationFiled: November 30, 2012Publication date: June 5, 2014Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: ROBERT C. BARASZU, KURT M. JOHNSON, ZACHARY D. BYLSMA, DAMON R. FRISCH, WEI LIU, DAVID S. MAXWELL
-
Publication number: 20130043840Abstract: Systems and methods to perform cell balancing on a vehicle battery pack. Cell balancing regulates which cells are discharged during use of the battery pack. Individual cell capacities may be used to determine for how long individual cells are discharged.Type: ApplicationFiled: August 16, 2011Publication date: February 21, 2013Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Zachary D. Bylsma, Matthew A. Herrmann