Patents by Inventor Harmohan N. Singh

Harmohan N. Singh 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: 10514425
    Abstract: A system for assuring safe use of a battery pack includes a display unit and a state of health (SoH) monitor connected to the battery pack, the SoH monitor.
    Type: Grant
    Filed: June 12, 2018
    Date of Patent: December 24, 2019
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: Jeevan Reddy Neelam, Madasamy Shunmugavel, Harmohan N Singh, Hassan Ali Kojori
  • Publication number: 20180292460
    Abstract: A system for assuring safe use of a battery pack includes a display unit and a state of health (SoH) monitor connected to the battery pack, the SoH monitor.
    Type: Application
    Filed: June 12, 2018
    Publication date: October 11, 2018
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Jeevan Reddy Neelam, Madasamy Shunmugavel, Harmohan N Singh, Hassan Ali Kojori
  • Publication number: 20180246173
    Abstract: Methods and apparatus for online estimation of battery model parameters for determining a State-of-Charge (SoC) and a State-of-Health (SoH) of a battery are provided. A mathematical approach using voltage, current, and temperature samples at programmable intervals to estimate RC battery model parameters is utilized, reducing computational requirements to enable real-time estimation of the SoC in an online environment. The SoC estimation utilizes an optimal estimator with an Extended Kalman Filter (EKF) to reduce sensitivity to process noise and measurement errors. After a discharge or charge operation, the SoH can also be estimated and updated as necessary.
    Type: Application
    Filed: February 28, 2017
    Publication date: August 30, 2018
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Harmohan N. Singh, Jeevan Reddy Neelam, Madasamy Shunmugavel
  • Patent number: 9157966
    Abstract: An online method and apparatus for determining state of charge (SoC) and state of health (SoH) of batteries on platforms that present dynamic charge and discharge environments is disclosed. A rested open circuit voltage (OCV) may be estimated online using a battery dynamic model along with measured terminal voltage, current and temperature. The SoC and SoH can then be determined from this estimated OCV. The apparatus and methods may estimate SoC and SoH of a battery in a real-time fashion without the need to a) disconnect the battery system from service; b) wait for a predefined rest time; or c) depolarize the battery.
    Type: Grant
    Filed: November 25, 2011
    Date of Patent: October 13, 2015
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: Anki Reddy Papana, Harmohan N. Singh, Hassan Ali Kojori, Subodh Keshri, David Lazarovich
  • Patent number: 9013066
    Abstract: A power management system may employ a power source, a distribution system between the power source and electrical loads and an energy accumulator. The accumulator may comprise a plurality of energy processing blocks. Each block may have a limited number of energy storage cells connected in series to produce first voltage. A second higher output voltage from the accumulator may be achieved though integrated DC-DC, DC-AC and AC-DC conversion with intermediate boost of AC voltage through high frequency transformers. Bidirectional power flow may be achieved with high efficiency during charge and discharge of the accumulator. Secondary windings of the transformers may be connected with one another in series so that the accumulator can transfer energy between the distribution system and any one or all of the energy processing units in a fault-tolerant and efficient manner.
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: April 21, 2015
    Assignee: Honeywell International Inc.
    Inventors: Hassan Ali Kojori, Harmohan N. Singh, David Lazarovich, Momcilo Tanic
  • Patent number: 8946929
    Abstract: A method for effectively utilizing energy storage components within a microgrid may include the steps of connecting a first plurality of energy storage components to a DC bus through switches, connecting a second plurality of energy storage components to an AC bus through inverters, connecting controllers to the energy storage components, connecting a first plurality of the controllers to the DC bus to regulate bidirectional flow of energy between the DC bus and the first plurality of energy storage components and connecting a second plurality of the controllers to the AC bus to regulate bidirectional flow of energy between the AC bus and the second plurality of energy storage components. The controllers may be interconnected with a local energy storage system bus and controlled via a master microgrid controller connected to the local energy storage system bus.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: February 3, 2015
    Assignee: Honeywell International Inc.
    Inventors: Harmohan N. Singh, Cristian Anghel
  • Publication number: 20130113287
    Abstract: An online method and apparatus for determining state of charge (SoC) and state of health (SoH) of energy storage components in a microgrid environment is disclosed. The apparatus and methods may estimate SoC and SoH of an energy storage device in a real-time fashion. The SoC may be used to preserve/extend the life of the energy storage components, while the SoH may be used for trend analysis and energy storage component prognostics.
    Type: Application
    Filed: November 4, 2011
    Publication date: May 9, 2013
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: HARMOHAN N. SINGH, CRISTIAN ANGHEL
  • Patent number: 8384343
    Abstract: A power management system may comprise a generative power source, a main bus between the generative power source and electrical loads, a energy accumulator and a main bi directional power converter interposed between the main bus and the energy accumulator unit. The energy accumulator may comprise a plurality of energy storage blocks. The energy storage blocks may individually comprise energy storage units and control units with dedicated DC/DC bidirectional power converters.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: February 26, 2013
    Assignee: Honeywell International Inc.
    Inventors: Hassan Ali Kojori, David Lazarovich, Harmohan N. Singh
  • Patent number: 8193761
    Abstract: A hybrid power system is comprised of a high energy density element such as a fuel-cell and high power density elements such as a supercapacitor banks. A DC/DC converter electrically connected to the fuel cell and converting the energy level of the energy supplied by the fuel cell. A first switch is electrically connected to the DC/DC converter. First and second supercapacitors are electrically connected to the first switch and a second switch. A controller is connected to the first switch and the second switch, monitoring charge levels of the supercapacitors and controls the switching in response to the charge levels. A load is electrically connected to the second switch. The first switch connects the DC/DC converter to the first supercapacitor when the second switch connects the second supercapacitor to the load. The first switch connects the DC/DC converter to the second supercapacitor when the second switch connects the first supercapacitor to the load.
    Type: Grant
    Filed: November 8, 2007
    Date of Patent: June 5, 2012
    Assignee: Honeywell International, Inc.
    Inventor: Harmohan N. Singh
  • Publication number: 20120126619
    Abstract: A hybrid power system is comprised of a high energy density element such as a fuel-cell and high power density elements such as a supercapacitor banks. A DC/DC converter electrically connected to the fuel cell and converting the energy level of the energy supplied by the fuel cell. A first switch is electrically connected to the DC/DC converter. First and second supercapacitors are electrically connected to the first switch and a second switch. A controller is connected to the first switch and the second switch, monitoring charge levels of the supercapacitors and controls the switching in response to the charge levels. A load is electrically connected to the second switch. The first switch connects the DC/DC converter to the first supercapacitor when the second switch connects the second supercapacitor to the load. The first switch connects the DC/DC converter to the second supercapacitor when the second switch connects the first supercapacitor to the load.
    Type: Application
    Filed: November 8, 2007
    Publication date: May 24, 2012
    Inventor: HARMOHAN N. SINGH
  • Publication number: 20110260690
    Abstract: A power management system may comprise a generative power source, a main bus between the generative power source and electrical loads, a energy accumulator and a main bi directional power converter interposed between the main bus and the energy accumulator unit. The energy accumulator may comprise a plurality of energy storage blocks. The energy storage blocks may individually comprise energy storage units and control units with dedicated DC/DC bidirectional power converters.
    Type: Application
    Filed: April 27, 2010
    Publication date: October 27, 2011
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: HASSAN ALI KOJORI, DAVID LAZAROVICH, HARMOHAN N. SINGH
  • Patent number: 7705564
    Abstract: In accordance with various embodiments, there is a method for determining the state of charge of a battery. Various embodiments include the steps of determining the specific gravity of the battery and measuring an open circuit voltage of the battery at rest. The open circuit voltage at rest can be used to determine the battery state of charge from a correlation function dependent on the battery specific gravity.
    Type: Grant
    Filed: July 16, 2008
    Date of Patent: April 27, 2010
    Assignee: Honeywell International Inc.
    Inventors: Hector M. Atehortua, Steven Hoenig, Thirumalai G. Palanisamy, Harmohan N. Singh
  • Patent number: 7612540
    Abstract: Embodiments provide a method and a system for determining cell imbalance condition of a multi-cell battery including a plurality of cell strings. To determine a cell imbalance condition, a charge current is applied to the battery and is monitored during charging. The charging time for each cell string is determined based on the monitor of the charge current. A charge time difference of any two cell strings in the battery is used to determine the cell imbalance condition by comparing with a predetermined acceptable charge time difference for the cell strings.
    Type: Grant
    Filed: October 24, 2006
    Date of Patent: November 3, 2009
    Assignee: Honeywell International Inc.
    Inventor: Harmohan N. Singh
  • Patent number: 7576545
    Abstract: In accordance with various embodiments, there are systems and methods for predicting end of life of a Li-ion battery. The method can include at least one of partially charging and partially discharging a battery, measuring an open circuit voltage of the battery before and after at least one of partial charging and partial discharging, and determining a state of charge value of the battery corresponding to the open circuit voltage measured before and after at least one of partial charging and partial discharging. The method can also include correlating at least one of a charge energy and a discharge energy with a change in the state of charge value and extrapolating to get a full battery capacity, tracking the full battery capacity as a function of time, and performing trend analysis of the full battery capacity over time to predict the battery's end of life.
    Type: Grant
    Filed: October 18, 2006
    Date of Patent: August 18, 2009
    Assignee: Honeywell International Inc.
    Inventors: Harmohan N. Singh, James S. Johnson
  • Patent number: 7471090
    Abstract: In accordance with various embodiments, there is a method for determining the capacity of a battery. Various embodiments include applying a predetermined current ramp to a fully charged lead-acid battery while measuring a battery terminal voltage. An Iup can be determined, where the Iup is a transition from charging to overcharging. A specific gravity of the lead-acid battery can also be determined. The capacity of the lead-acid battery can then be determined from the Iup using a correlation function that describes the relationship of the Iup to the capacity, where the correlation function depends on the specific gravity of the lead-acid battery.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: December 30, 2008
    Assignee: Honeywell International Inc.
    Inventors: Hector M. Atehortua, Steven Hoenig, Thirumalai G. Palanisamy, Harmohan N. Singh
  • Publication number: 20080272790
    Abstract: In accordance with various embodiments, there is a method for determining the state of charge of a battery. Various embodiments include the steps of determining the specific gravity of the battery and measuring an open circuit voltage of the battery at rest. The open circuit voltage at rest can be used to determine the battery state of charge from a correlation function dependent on the battery specific gravity.
    Type: Application
    Filed: July 16, 2008
    Publication date: November 6, 2008
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: HECTOR M. ATEHORTUA, STEVEN HOENIG, THIRUMALAI G. PALANISAMY, HARMOHAN N. SINGH
  • Patent number: 7429436
    Abstract: In accordance with various embodiments, there is a method for determining the state of charge of a battery. Various embodiments include the steps of determining the specific gravity of the battery and measuring an open circuit voltage of the battery at rest. The open circuit voltage at rest can be used to determine the battery state of charge from a correlation function dependent on the battery specific gravity.
    Type: Grant
    Filed: January 31, 2005
    Date of Patent: September 30, 2008
    Assignee: Honeywell International Inc.
    Inventors: Hector M. Atehortua, Steven Hoenig, Thirumalai G. Palanisamy, Harmohan N. Singh
  • Publication number: 20080094031
    Abstract: In accordance with various embodiments, there are systems and methods for predicting end of life of a Li-ion battery. The method can include at least one of partially charging and partially discharging a battery, measuring an open circuit voltage of the battery before and after at least one of partial charging and partial discharging, and determining a state of charge value of the battery corresponding to the open circuit voltage measured before and after at least one of partial charging and partial discharging. The method can also include correlating at least one of a charge energy and a discharge energy with a change in the state of charge value and extrapolating to get a full battery capacity, tracking the full battery capacity as a function of time, and performing trend analysis of the full battery capacity over time to predict the battery's end of life.
    Type: Application
    Filed: October 18, 2006
    Publication date: April 24, 2008
    Inventors: Harmohan N. Singh, James S. Johnson
  • Publication number: 20080094029
    Abstract: Embodiments provide a method and a system for determining cell imbalance condition of a multi-cell battery including a plurality of cell strings. To determine a cell imbalance condition, a charge current is applied to the battery and is monitored during charging. The charging time for each cell string is determined based on the monitor of the charge current. A charge time difference of any two cell strings in the battery is used to determine the cell imbalance condition by comparing with a predetermined acceptable charge time difference for the cell strings.
    Type: Application
    Filed: October 24, 2006
    Publication date: April 24, 2008
    Inventor: Harmohan N. Singh
  • Patent number: 7345453
    Abstract: In accordance with the invention, there is a battery defect detection method comprising applying a current ramp to a battery; determining a first time (t1) when a current of the battery reaches a maximum current (Ipeak), and determining a second time (t2) when a terminal voltage of the battery reaches a maximum voltage (Vpeak). The method also includes determining a differential (d), wherein (d)=/(t1)?(t2)/, and wherein (d) corresponds to a magnitude of defects in the battery.
    Type: Grant
    Filed: March 1, 2005
    Date of Patent: March 18, 2008
    Assignee: Honeywell International, Inc.
    Inventors: Hector M. Atehortua, Steven Hoenig, Thirumalai G. Palanisamy, Harmohan N. Singh