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  • MANAGING ISLANDED POWER SYSTEMS USING BATTERY STATE OF CHARGE AND FREQUENCY
    Publication number: 20180166887
    Abstract: A battery management system is configured to, in an island mode, cause a frequency adjustment (e.g., by 3 Hz) to voltage in the power system based on a state of charge. The frequency adjustment signals assets (e.g., loads, generators, energy storage devices) electrically coupled to a battery system to reduce or increase power. If the state of charge is below a threshold value, the frequency adjustment may signal a load to be decreased, power generation of a generator to be increased, or power output of an energy storage device to be increased. If the state of charge is above a threshold value, the frequency adjustment may signal a load to be maintained or increased, power generation of a generator to be decreased, or power output of an energy storage device to be decreased. The frequency adjustment may be calculated automatically as a function of the state of charge.
    Type: Application
    Filed: December 9, 2016
    Publication date: June 14, 2018
    Applicant: UniEnergy Technologies, LLC
    Inventor: David Ridley
  • Matching state of charge in a string
    Patent number: 10135087
    Abstract: A method of operating a redox flow battery string including at least first and second redox flow batteries and an outside power source includes: providing a least first and second redox flow batteries in a string electrically connected in a string, and each redox flow battery having a state-or-charge (SOC) and an electrical load, wherein the electrical load for at least one of the first and second redox flow batteries in the string is powered by the outside power source; obtaining an SOC value for each redox flow battery in the string; identifying a target SOC value in the string; and adjusting the SOC value for at least one of the first and second redox flow batteries to correspond to the target SOC value by using a portion of stored energy in the at least one first or second redox flow battery to supply power to the electrical load.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: November 20, 2018
    Assignee: UniEnergy Technologies, LLC
    Inventors: Chenxi Sun, Jinfeng Wu, Liyu Li, Jacob Parks, David Ridley
  • Gas management systems and methods in a redox flow battery
    Patent number: 9941527
    Abstract: A method of operating a redox flow battery includes providing a redox flow battery including an anolyte storage tank configured for containing a quantity of anolyte and an anolyte headspace, a catholyte storage tank configured for containing a quantity of a catholyte and a catholyte headspace, and a gas management system comprising at least one open conduit interconnecting the anolyte headspace and the catholyte headspace for free gas exchange between the anolyte and catholyte headspaces, and a passive gas exchange device in gaseous fluid communication with the anolyte headspace, the passive gas exchange device configured to release gas from the anolyte headspace to an exterior battery environment when an interior battery pressure exceeds an exterior battery pressure by a predetermined amount, and operating the battery.
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: April 10, 2018
    Assignee: UniEnergy Technologies, LLC
    Inventors: Liyu Li, Guanguang Xia, Jinfeng Wu, Chenxi Sun, Christopher Howard
  • MATCHING STATE OF CHARGE IN A STRING
    Publication number: 20180166726
    Abstract: A method of operating a redox flow battery string including at least first and second redox flow batteries and an outside power source includes: providing a least first and second redox flow batteries in a string electrically connected in a string, and each redox flow battery having a state-or-charge (SOC) and an electrical load, wherein the electrical load for at least one of the first and second redox flow batteries in the string is powered by the outside power source; obtaining an SOC value for each redox flow battery in the string; identifying a target SOC value in the string; and adjusting the SOC value for at least one of the first and second redox flow batteries to correspond to the target SOC value by using a portion of stored energy in the at least one first or second redox flow battery to supply power to the electrical load.
    Type: Application
    Filed: December 9, 2016
    Publication date: June 14, 2018
    Applicant: UniEnergy Technologies, LLC
    Inventors: Chenxi Sun, Jinfeng Wu, Liyu Li, Jacob Parks, David Ridley
  • FLOW BATTERY SYSTEM
    Publication number: 20190326619
    Abstract: In accordance with embodiments of the present disclosure, a redox flow battery (RFB) may include a shell, an electrolyte storage tank assembly disposed in the shell, wherein at least a portion of the electrolyte storage tank assembly is supported by the shell, an electrochemical cell, and an electrolyte circulation system configured for fluid communication between the electrolyte storage tank assembly and the electrochemical cell. In some embodiments, at least a portion of the electrolyte storage tank assembly defines a tank assembly heat transfer system between an outer surface of the electrolyte storage tank assembly and an inner surface of the shell. In other embodiments, a pump assembly in the electrolyte circulation system is moveable between a first position and a second position. In other embodiments, a gas management system includes a first gas exchange device in fluid communication with the catholyte headspace and the anolyte.
    Type: Application
    Filed: December 19, 2018
    Publication date: October 24, 2019
    Applicant: UniEnergy Technologies, LLC
    Inventors: Richard O. Winter, Kathryn M. Oseen-Senda, Brian Aher, Jonathan Horner, Guanguang Xia, Jinfeng Wu, Erik K.L. Johnson, Jason I. Cruz
  • CHARGE CAPACITY MANAGEMENT IN REDOX FLOW BATTERY STRING
    Publication number: 20160006052
    Abstract: A method of operating a redox flow battery string includes providing a plurality of redox flow batteries, each redox flow battery in electrical communication with at least one other redox flow battery, and each redox flow battery comprising an anolyte storage tank including a quantity of anolyte, a catholyte storage tank including a quantity of catholyte, and an electrochemical cell in fluid communication with the anolyte and catholyte storage tanks; obtaining an open circuit voltage value for each redox flow battery in the string; identifying a predetermined open circuit voltage value in the string; and adjusting the open circuit voltage value for each redox flow battery to correspond to the predetermined open circuit voltage value. A redox flow battery string system includes a plurality of redox flow batteries each redox flow battery in electrical communication with at least one other redox flow battery having an open circuit voltage value.
    Type: Application
    Filed: July 7, 2015
    Publication date: January 7, 2016
    Applicant: UniEnergy Technologies, LLC
    Inventors: Liyu Li, Chenxi Sun, Jinfeng Wu
  • Charge capacity management in redox flow battery string
    Patent number: 10333159
    Abstract: A method of operating a redox flow battery string includes providing a plurality of redox flow batteries, each redox flow battery in electrical communication with at least one other redox flow battery, and each redox flow battery comprising an anolyte storage tank including a quantity of anolyte, a catholyte storage tank including a quantity of catholyte, and an electrochemical cell in fluid communication with the anolyte and catholyte storage tanks; obtaining an open circuit voltage value for each redox flow battery in the string; identifying a predetermined open circuit voltage value in the string; and adjusting the open circuit voltage value for each redox flow battery to correspond to the predetermined open circuit voltage value. A redox flow battery string system includes a plurality of redox flow batteries each redox flow battery in electrical communication with at least one other redox flow battery having an open circuit voltage value.
    Type: Grant
    Filed: July 7, 2015
    Date of Patent: June 25, 2019
    Assignee: UniEnergy Technologies, LLC
    Inventors: Liyu Li, Chenxi Sun, Jinfeng Wu
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