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公开(公告)号：US20180316037A1
公开(公告)日：2018-11-01
申请号：US15965722
申请日：2018-04-27
Applicant: ESS TECH, INC.
Inventor： Yang Song , Craig E. Evans
IPC: H01M8/18 , H01M8/06 , H01M8/04858 , H01M8/04537
CPC classification number: G06K9/0002 , G06K9/0012
Abstract: A method of cleansing a redox flow battery system may include operating the redox flow battery system in a charge, discharge, or idle mode, and responsive to a redox flow battery capacity being less than a threshold battery capacity, mixing the positive electrolyte with the negative electrolyte. In this way, battery capacity degradation following cyclic charging and discharging of the redox flow battery system can be substantially reduced.
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公开(公告)号：US20160190604A1
公开(公告)日：2016-06-30
申请号：US14984416
申请日：2015-12-30
Applicant: ESS TECH, INC.
Inventor： Craig E. Evans , Yang Song , Jeffrey Chen
IPC: H01M4/88 , H01M8/18 , H01M8/0256 , H01M8/0239 , H01M8/0245
CPC classification number: H01M4/8803 , H01M4/8817 , H01M4/8828 , H01M8/0239 , H01M8/0245 , H01M8/188 , H01M8/20 , Y02E60/528
Abstract: An electrode for use in an all-iron redox flow battery is provided. In one example, the electrode may include a plastic mesh; and a coating on the plastic mesh. The coating may be a hydrophilic coating or a conductive coating and the electrode may have an electrode reaction potential is less than 0.8V. Further, a method of manufacturing a coated plastic mesh electrode for use in an all-iron redox flow battery is provided. In one example method, the steps include fabricating a plastic mesh, treating the plastic mesh by applying a solvent treatment or a plasma treatment or a mechanical abrasion treatment; coating the plastic mesh with a material selected from: carbon inks, metal oxides, and hydrophilic polymers.
Abstract translation: 提供了一种用于全铁氧化还原液流电池的电极。 在一个示例中，电极可以包括塑料网; 和塑料网上的涂层。 涂层可以是亲水性涂层或导电涂层，并且电极的电极反应电位可能小于0.8V。 此外，提供了一种制造用于全铁氧化还原液流电池的涂覆塑料网状电极的方法。 在一个示例性方法中，步骤包括制造塑料网，通过施加溶剂处理或等离子体处理或机械磨损处理来处理塑料网; 用选自：碳油墨，金属氧化物和亲水性聚合物的材料涂覆塑料网。
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公开(公告)号：US20240162467A1
公开(公告)日：2024-05-16
申请号：US18421785
申请日：2024-01-24
Applicant: ESS TECH, INC.
Inventor： Yang Song , Craig E. Evans , Brady Thompson
IPC: H01M8/18
CPC classification number: H01M8/188
Abstract: A method for a redox flow battery may include, interrupting cycling of the redox flow battery, including charging the redox flow battery to a threshold charge condition, draining positive and negative electrolyte from the redox flow battery, circulating a wash solution through the redox flow battery, and returning the positive and negative electrolyte to the redox flow battery, and resuming cycling of the redox flow battery. In this way, contamination of the redox flow battery system can be reduced, thereby prolonging the life and increasing performance of the redox flow battery system.
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公开(公告)号：US11817606B2
公开(公告)日：2023-11-14
申请号：US15965728
申请日：2018-04-27
Applicant: ESS TECH, INC.
Inventor： Craig E. Evans
IPC: H01M8/0662 , H01M8/18 , H01M8/04276 , H01M8/2455 , H01M8/04186
CPC classification number: H01M8/0687 , H01M8/04186 , H01M8/04276 , H01M8/188 , H01M8/2455 , Y02E60/50
Abstract: A rebalancing reactor for a redox flow battery system may include a first side through which hydrogen gas is flowed, a second side through which electrolyte from the redox flow battery system is flowed, and a porous layer separating and fluidly coupled to the first side and the second side, wherein, the hydrogen gas and the electrolyte are fluidly contacted at a surface of the porous layer, and a pressure drop across the second side is less than a pressure drop across the porous layer. In this way, rebalancing of electrolyte charges in a redox flow battery system may be performed with increased efficiency and cost effectiveness as compared to conventional rebalancing reactors.
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公开(公告)号：US20230299318A1
公开(公告)日：2023-09-21
申请号：US18324044
申请日：2023-05-25
Applicant: ESS TECH, INC.
Inventor： Yang Song , Craig E. Evans , Timothy J. McDonald , Kenneth Fisher , Sean Kissick
IPC: H01M8/04276 , H01M8/18 , H01M8/04186
CPC classification number: H01M8/04276 , H01M8/188 , H01M8/04186
Abstract: A method for a redox flow battery system may include flowing an electrolyte from an electrolyte storage tank to a multi-stage rebalancing reactor, the multi-stage rebalancing reactor comprising reactor vessels grouped to form stages. Hydrogen gas may be injected into the electrolyte upstream of the multi-stage rebalancing reactor via a gas line and a metal ion of the electrolyte may be chemically reduced by oxidizing the hydrogen gas at a catalyst bed of each of the reactor vessels to maintain a charge balance of the electrolyte and a pH of the electrolyte within a predetermined range.
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Patent Agency Ranking
公开(公告)号：US20220285717A1
公开(公告)日：2022-09-08
申请号：US17664562
申请日：2022-05-23
Applicant: ESS Tech, Inc.
Inventor： Yang Song , Craig E. Evans
Abstract: Methods and systems are provided for a redox flow battery system. In one example, the redox flow battery is adapted with an additive included in a battery electrolyte and an anion exchange membrane separator dividing positive electrolyte from negative electrolyte. An overall system cost of the battery system may be reduced while a storage capacity, energy density and performance may be increased.
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公开(公告)号：US11424470B2
公开(公告)日：2022-08-23
申请号：US16536237
申请日：2019-08-08
Applicant: ESS TECH, INC.
Inventor： Yang Song , Craig E. Evans
Abstract: Methods and systems are provided for a redox flow battery system. In one example, the redox flow battery is adapted with an additive included in a battery electrolyte and an anion exchange membrane separator dividing positive electrolyte from negative electrolyte. An overall system cost of the battery system may be reduced while a storage capacity, energy density and performance may be increased.
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公开(公告)号：US20210313589A1
公开(公告)日：2021-10-07
申请号：US17235810
申请日：2021-04-20
Applicant: ESS TECH, INC.
Inventor： Craig E. Evans , Yang Song , Jeffrey Chen
IPC: H01M4/88 , H01M8/0239 , H01M8/0245 , H01M8/18 , H01M8/20
Abstract: An electrode for use in an all-iron redox flow battery is provided. In one example, the electrode may include a plastic mesh; and a coating on the plastic mesh. The coating may be a hydrophilic coating or a conductive coating and the electrode may have an electrode reaction potential is less than 0.8V. Further, a method of manufacturing a coated plastic mesh electrode for use in an all-iron redox flow battery is provided. In one example method, the steps include fabricating a plastic mesh, treating the plastic mesh by applying a solvent treatment or a plasma treatment or a mechanical abrasion treatment; coating the plastic mesh with a material selected from: carbon inks, metal oxides, and hydrophilic polymers.
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公开(公告)号：US20210143463A1
公开(公告)日：2021-05-13
申请号：US17151611
申请日：2021-01-18
Applicant: ESS TECH, INC.
Inventor： Yang Song , Craig E. Evans
Abstract: A method of rebalancing electrolytes in a redox flow battery system comprises directing hydrogen gas generated on the negative side of the redox flow battery system to a catalyst surface, and fluidly contacting the hydrogen gas with an electrolyte comprising a metal ion at the catalyst surface, wherein the metal ion is chemically reduced by the hydrogen gas at the catalyst surface, and a state of charge of the electrolyte and pH of the electrolyte remain substantially balanced.
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公开(公告)号：US10586996B2
公开(公告)日：2020-03-10
申请号：US15436593
申请日：2017-02-17
Applicant: ESS TECH, INC.
Inventor： Craig E. Evans , Yang Song
IPC: H01M8/18 , H01M8/04186 , H01M8/04791 , H01M8/04701 , H01M8/20
Abstract: A method of operating an iron redox flow battery system may comprise fluidly coupling a plating electrode of an iron redox flow battery cell to a plating electrolyte; fluidly coupling a redox electrode of the iron redox flow battery cell to a redox electrolyte; fluidly coupling a ductile plating additive to one or both of the plating electrolyte and the redox electrolyte; and increasing an amount of the ductile plating additive to the plating electrolyte in response to an increase in the plating stress at the plating electrode. In this way, ductile Fe can be plated on the negative electrode, and the performance, reliability and efficiency of the iron redox flow battery can be maintained. In addition, iron can be more rapidly produced and plated at the plating electrode, thereby achieving a higher charging rate for all iron flow batteries.
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