Patents by Inventor Sarah G. Stewart
Sarah G. Stewart 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: 10534028Abstract: An apparatus and method for identifying a presence of a short circuit in a battery pack. A fault-detection apparatus for a charging system that rapidly charges a collection of interconnected lithium ion battery cells, the safety system includes a data-acquisition system for receiving a set of data parameters from the collection while the charging system is actively charging the collection; a monitoring system evaluating the set of data parameters to identify a set of anomalous conditions; and a controller comparing the set of anomalous conditions against a set of predetermined profiles indicative of an internal short in one or more cells of the collection, the controller establishing an internal-short state for the collection when the comparing has a predetermined relationship to the set of predetermined profiles.Type: GrantFiled: November 22, 2016Date of Patent: January 14, 2020Assignee: Tesla, Inc.Inventors: Sarah G. Stewart, Christopher Dangler, Clay H. Kishiyama, Weston A. Hermann, Scott I. Kohn, Kurt R. Kelty
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Patent number: 9728990Abstract: A system and method for early identification of an impending fast-charge or fast-charge opportunity and use of that information to prepare the battery cells for the fast-charge.Type: GrantFiled: October 31, 2012Date of Patent: August 8, 2017Assignee: TESLA, INC.Inventors: Christopher Dangler, Sarah G. Stewart, Clay Hajime Kishiyama
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Patent number: 9694699Abstract: An automated charge preparation method periodically determines critical parameters for the set of relevant operating conditions, determines whether fast charging is possible, applies fast charging when possible, otherwise applies a dynamically scaled charging rate that is optimized based upon current critical parameters (while optionally heating the individual battery cells as long as fast charging is not available) to reduce/eliminate a risk of lithium-plating.Type: GrantFiled: November 21, 2014Date of Patent: July 4, 2017Assignee: Tesla, Inc.Inventors: Kurt R. Kelty, Clay H. Kishiyama, Sarah G. Stewart
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Publication number: 20170074918Abstract: An apparatus and method for identifying a presence of a short circuit in a battery pack. A fault-detection apparatus for a charging system that rapidly charges a collection of interconnected lithium ion battery cells, the safety system includes a data-acquisition system for receiving a set of data parameters from the collection while the charging system is actively charging the collection; a monitoring system evaluating the set of data parameters to identify a set of anomalous conditions; and a controller comparing the set of anomalous conditions against a set of predetermined profiles indicative of an internal short in one or more cells of the collection, the controller establishing an internal-short state for the collection when the comparing has a predetermined relationship to the set of predetermined profiles.Type: ApplicationFiled: November 22, 2016Publication date: March 16, 2017Applicant: Tesla Motors, Inc.Inventors: Sarah G. Stewart, Christopher Dangler, Clay H. Kishiyama, Weston A. Hermann, Scott I. Kohn, Kurt R. Kelty
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Patent number: 9506990Abstract: An apparatus and method for identifying a presence of a short circuit in a battery pack. A fault-detection apparatus for a charging system that rapidly charges a collection of interconnected lithium ion battery cells, the safety system includes a data-acquisition system for receiving a set of data parameters from the collection while the charging system is actively charging the collection; a monitoring system evaluating the set of data parameters to identify a set of anomalous conditions; and a controller comparing the set of anomalous conditions against a set of predetermined profiles indicative of an internal short in one or more cells of the collection, the controller establishing an internal-short state for the collection when the comparing has a predetermined relationship to the set of predetermined profiles.Type: GrantFiled: September 29, 2014Date of Patent: November 29, 2016Assignee: TESLA MOTORS, INC.Inventors: Sarah G. Stewart, Christopher Dangler, Clay H. Kishiyama, Weston A. Hermann, Scott I. Kohn, Kurt R. Kelty
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Publication number: 20150077057Abstract: An automated charge preparation method periodically determines critical parameters for the set of relevant operating conditions, determines whether fast charging is possible, applies fast charging when possible, otherwise applies a dynamically scaled charging rate that is optimized based upon current critical parameters (while optionally heating the individual battery cells as long as fast charging is not available) to reduce/eliminate a risk of lithium-plating.Type: ApplicationFiled: November 21, 2014Publication date: March 19, 2015Inventors: Kurt R. Kelty, Clay H. Kishiyama, Sarah G. Stewart
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Patent number: 8970173Abstract: A method of setting the operational mode of an electric vehicle is provided, where the operational mode is selected from a plurality of operational modes that include at least a Battery Life mode and a Standard mode, wherein the Battery Life mode is configured to select operating and charging parameters that emphasize battery health and battery life over vehicle range and/or vehicle performance. The system includes a thermal management system for maintaining the vehicle's battery pack to within any of a plurality of temperature ranges, and a charging system for charging the vehicle's battery pack to any of a plurality of minimum and maximum SOC levels and at any of a plurality of charging rates.Type: GrantFiled: February 28, 2012Date of Patent: March 3, 2015Assignee: Tesla Motors, Inc.Inventors: Kurt Russell Kelty, Weston Arthur Hermann, Scott Ira Kohn, Clay Hajime Kishiyama, Vineet Haresh Mehta, Sarah G. Stewart
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Publication number: 20150039255Abstract: An apparatus and method for identifying a presence of a short circuit in a battery pack. A fault-detection apparatus for a charging system that rapidly charges a collection of interconnected lithium ion battery cells, the safety system includes a data-acquisition system for receiving a set of data parameters from the collection while the charging system is actively charging the collection; a monitoring system evaluating the set of data parameters to identify a set of anomalous conditions; and a controller comparing the set of anomalous conditions against a set of predetermined profiles indicative of an internal short in one or more cells of the collection, the controller establishing an internal-short state for the collection when the comparing has a predetermined relationship to the set of predetermined profiles.Type: ApplicationFiled: September 29, 2014Publication date: February 5, 2015Inventors: Sarah G. STEWART, Christopher Dangler, Clay H. Kishiyama, Weston A. Hermann, Scott I. Kohn, Kurt R. Kelty
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Patent number: 8907629Abstract: A multi-mode operating system for an electric vehicle is provided, the system including means for a user to select a preferred mode of operation from a plurality of operational modes that include at least a Battery Life mode and a Standard mode, wherein the Battery Life mode is configured to select operating and charging parameters that emphasize battery health and battery life over vehicle range and/or vehicle performance. The system includes a thermal management system for maintaining the vehicle's battery pack to within any of a plurality of temperature ranges, and a charging system for charging the vehicle's battery pack to any of a plurality of minimum and maximum SOC levels and at any of a plurality of charging rates.Type: GrantFiled: February 28, 2012Date of Patent: December 9, 2014Assignee: Tesla Motors, Inc.Inventors: Kurt Russell Kelty, Weston Arthur Hermann, Scott Ira Kohn, Clay Hajime Kishiyama, Vineet Haresh Mehta, Sarah G. Stewart
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Patent number: 8901885Abstract: An automated charge preparation method periodically determines critical parameters for the set of relevant operating conditions, determines whether fast charging is possible, applies fast charging when possible, otherwise applies a dynamically scaled charging rate that is optimized based upon current critical parameters (while optionally heating the individual battery cells as long as fast charging is not available) to reduce/eliminate a risk of lithium-plating.Type: GrantFiled: March 9, 2012Date of Patent: December 2, 2014Assignee: Tesla Motors, Inc.Inventors: Kurt Russell Kelty, Clay Hajime Kishiyama, Sarah G. Stewart
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Patent number: 8866444Abstract: An apparatus and method for identifying a presence of a short circuit in a battery pack. A fault-detection apparatus for a charging system that rapidly charges a collection of interconnected lithium ion battery cells, the safety system includes a data-acquisition system for receiving a set of data parameters from the collection while the charging system is actively charging the collection; a monitoring system evaluating the set of data parameters to identify a set of anomalous conditions; and a controller comparing the set of anomalous conditions against a set of predetermined profiles indicative of an internal short in one or more cells of the collection, the controller establishing an internal-short state for the collection when the comparing has a predetermined relationship to the set of predetermined profiles.Type: GrantFiled: December 16, 2010Date of Patent: October 21, 2014Assignee: Tesla Motors, Inc.Inventors: Sarah G. Stewart, Christopher Dangler, Clay Hajime Kishiyama, Weston Arthur Hermann, Scott Ira Kohn, Kurt Russell Kelty
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Patent number: 8803470Abstract: A power source comprised of a first battery pack (e.g., a non-metal-air battery pack) and a second battery pack (e.g., a metal-air battery pack) is provided, wherein the second battery pack is used when the user selects an extended range mode of operation. Minimizing use of the second battery pack prevents it from undergoing unnecessary, and potentially lifetime limiting, charge cycles.Type: GrantFiled: March 6, 2013Date of Patent: August 12, 2014Assignee: Tesla Motors, Inc.Inventors: Sarah G. Stewart, Scott Ira Kohn, Kurt Russell Kelty, Jeffrey Brian Straubel
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Patent number: 8803471Abstract: A power source comprised of a first battery pack (e.g., a non-metal-air battery pack) and a second battery pack (e.g., a metal-air battery pack) is provided, wherein the second battery pack is only used as required by the state-of-charge (SOC) of the first battery pack or as a result of the user selecting an extended range mode of operation. Minimizing use of the second battery pack prevents it from undergoing unnecessary, and potentially lifetime limiting, charge cycles. The second battery pack may be used to charge the first battery pack or used in combination with the first battery pack to supply operational power to the electric vehicle.Type: GrantFiled: March 18, 2013Date of Patent: August 12, 2014Assignee: Tesla Motors, Inc.Inventors: Sarah G. Stewart, Scott Ira Kohn, Kurt Russell Kelty, Jeffrey Brian Straubel
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Publication number: 20140121866Abstract: A system and method for early identification of an impending fast-charge or fast-charge opportunity and use of that information to prepare the battery cells for the fast-charge.Type: ApplicationFiled: October 31, 2012Publication date: May 1, 2014Applicant: TESLA MOTORS, INC.Inventors: Christopher Dangler, Sarah G. Stewart, Clay Hajime Kishiyama
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Publication number: 20130234648Abstract: An automated charge preparation method periodically determines critical parameters for the set of relevant operating conditions, determines whether fast charging is possible, applies fast charging when possible, otherwise applies a dynamically scaled charging rate that is optimized based upon current critical parameters (while optionally heating the individual battery cells as long as fast charging is not available) to reduce/eliminate a risk of lithium-plating.Type: ApplicationFiled: March 9, 2012Publication date: September 12, 2013Applicant: Tesla Motors, Inc.Inventors: Kurt Russell Kelty, Clay Hajime Kishiyama, Sarah G. Stewart
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Publication number: 20130221916Abstract: A multi-mode operating system for an electric vehicle is provided, the system including means for a user to select a preferred mode of operation from a plurality of operational modes that include at least a Battery Life mode and a Standard mode, wherein the Battery Life mode is configured to select operating and charging parameters that emphasize battery health and battery life over vehicle range and/or vehicle performance. The system includes a thermal management system for maintaining the vehicle's battery pack to within any of a plurality of temperature ranges, and a charging system for charging the vehicle's battery pack to any of a plurality of minimum and maximum SOC levels and at any of a plurality of charging rates.Type: ApplicationFiled: February 28, 2012Publication date: August 29, 2013Applicant: TESLA MOTORS, INC.Inventors: Kurt Russell Kelty, Weston Arthur Hermann, Scott Ira Kohn, Clay Hajime Kishiyama, Vineet Haresh Mehta, Sarah G. Stewart
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Publication number: 20130221928Abstract: A method of setting the operational mode of an electric vehicle is provided, where the operational mode is selected from a plurality of operational modes that include at least a Battery Life mode and a Standard mode, wherein the Battery Life mode is configured to select operating and charging parameters that emphasize battery health and battery life over vehicle range and/or vehicle performance. The system includes a thermal management system for maintaining the vehicle's battery pack to within any of a plurality of temperature ranges, and a charging system for charging the vehicle's battery pack to any of a plurality of minimum and maximum SOC levels and at any of a plurality of charging rates.Type: ApplicationFiled: February 28, 2012Publication date: August 29, 2013Applicant: TESLA MOTORS, INC.Inventors: Kurt Russell Kelty, Weston Arthur Hermann, Scott Ira Kohn, Clay Hajime Kishiyama, Vineet Haresh Mehta, Sarah G. Stewart
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Patent number: 8471521Abstract: A power source comprised of a first battery pack (e.g., a non-metal-air battery pack) and a second battery pack (e.g., a metal-air battery pack) is provided, wherein the second battery pack is only used as required by the state-of-charge (SOC) of the first battery pack or as a result of the user selecting an extended range mode of operation. Minimizing use of the second battery pack prevents it from undergoing unnecessary, and potentially lifetime limiting, charge cycles. The second battery pack may be used to charge the first battery pack or used in combination with the first battery pack to supply operational power to the electric vehicle.Type: GrantFiled: December 8, 2010Date of Patent: June 25, 2013Assignee: Tesla Motors, Inc.Inventors: Sarah G. Stewart, Scott Ira Kohn, Kurt Russell Kelty, Jeffrey Brian Straubel
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Patent number: 8450974Abstract: A power source comprised of a first battery pack (e.g., a non-metal-air battery pack) and a second battery pack (e.g., a metal-air battery pack) is provided, wherein the second battery pack is only used as required by the state-of-charge (SOC) of the first battery pack or as a result of the user selecting an extended range mode of operation. Minimizing use of the second battery pack prevents it from undergoing unnecessary, and potentially lifetime limiting, charge cycles. The second battery pack may be used to charge the first battery pack or used in combination with the first battery pack to supply operational power to the electric vehicle.Type: GrantFiled: December 8, 2010Date of Patent: May 28, 2013Assignee: Tesla Motors, Inc.Inventors: Sarah G. Stewart, Scott Ira Kohn, Kurt Russell Kelty, Jeffrey Brian Straubel
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Publication number: 20120038314Abstract: A power source comprised of a first battery pack (e.g., a non-metal-air battery pack) and a second battery pack (e.g., a metal-air battery pack) is provided, wherein the second battery pack is only used as required by the state-of-charge (SOC) of the first battery pack or as a result of the user selecting an extended range mode of operation. Minimizing use of the second battery pack prevents it from undergoing unnecessary, and potentially lifetime limiting, charge cycles. The second battery pack may be used to charge the first battery pack or used in combination with the first battery pack to supply operational power to the electric vehicle.Type: ApplicationFiled: December 8, 2010Publication date: February 16, 2012Applicant: TESLA MOTORS, INC.Inventors: Sarah G. Stewart, Scott Ira Kohn, Kurt Russell Kelty, Jeffrey Brian Straubel