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Mukilteo, WA, United States

Patent
UniEnergy Technologies LLC | Date: 2015-07-07

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.


Patent
Unienergy Technologies Llc | Date: 2015-07-07

A redox flow battery includes 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 conduit interconnecting the anolyte headspace and the catholyte headspace, and a gas exchange device configured to contain or release an evolving gas from either or both of the anolyte and catholyte storage tanks to an exterior battery environment when an interior battery pressure exceeds an exterior battery pressure by a predetermined amount.


Patent
Unienergy Technologies Llc | Date: 2015-07-07

A method of operating an all vanadium redox flow battery includes providing an all vanadium redox flow battery comprising an anolyte storage tank including a volume of anolyte and a catholyte storage tank including a volume of catholyte; an electrochemical cell in fluid communication with the anolyte and catholyte storage tanks; and a predetermined range for the ratio of vanadium concentration between the anolyte and the catholyte; and transferring an amount of catholyte from the catholyte storage tank to the anolyte storage tank, or an amount of anolyte from the anolyte storage tank to the catholyte storage tank, to restore the ratio of vanadium concentration to the predetermined range. An all vanadium redox flow battery system includes means for transferring anolyte and catholyte between the anolyte and catholyte storage tanks to maintain a predetermined range for the ratio of vanadium concentration between the anolyte and the catholyte.


Patent
Unienergy Technologies Llc | Date: 2015-07-07

A redox flow battery includes an anolyte storage tank having a height configured for containing a quantity of an anolyte; a catholyte storage tank having a height configured for containing a quantity of a catholyte; an electrochemical cell configured for fluid communication with the anolyte and catholyte storage tanks; and a tub defining a cavity formed in at least one of the anolyte and catholyte storage tanks to provide a sealed fluid connection point below the height of the at least one storage tank.


Patent
Unienergy Technologies Llc | Date: 2015-07-07

A redox flow battery includes a battery housed in a substantially closed housing having at least first and second internal containers, wherein the first and second containers are in fluid communication with each other, and wherein the first container is configured for containing a quantity of electrolyte and providing a gas headspace above the electrolyte; an electrolyte circulation system configured to circulate the electrolyte between the first and second containers; and -an anti-siphon device configured to prevent siphoning between the first and second containers.

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