公开(公告)号：US20230062739A1

公开(公告)日：2023-03-02

申请号：US17816316

申请日：2022-07-29

Applicant: ESS TECH, INC.

Inventor： Yang Song ,  Craig Evans

IPC: H01M8/18 ,  H01M8/2465 ,  H01M8/1016 ,  H01M8/0438

Abstract: Systems and methods are provided for electrolyte distribution, rebalancing, and storage in a redox flow battery system. In one example, the redox flow battery system may include a plurality of redox flow battery cells and a plurality of storage tanks respectively fluidically coupled thereto, wherein a gauge pressure in each of the plurality of storage tanks may be maintained below a relatively low pressure (for example, below 2 psi). In some examples, the redox flow battery system may further include a plurality of rebalancing cells respectively fluidically coupled to the plurality of storage tanks, each of the plurality of rebalancing cells including a stack of internally shorted electrode assemblies. In this way, the redox flow battery system may be operated at less than the relatively low pressure, such that multiple space effective (for example, prismatic and relatively small) storage tanks may be included.

公开(公告)号：US20220037751A1

公开(公告)日：2022-02-03

申请号：US17450970

申请日：2021-10-14

Applicant: ESS Tech, Inc.

Inventor： Craig Evans ,  Yang Song

IPC: H01M50/60 ,  H01M8/18 ,  H01M8/20 ,  H01M8/04186

Abstract: In one example, a system for a flow cell for a flow battery, comprising: a first flow field; and a polymeric frame, comprising: a top face; a bottom face, opposite the top face; a first side; a second side, opposite the first side; a first electrolyte inlet located on the top face and the first side of the polymeric frame; a first electrolyte outlet located on the top face and the second side of the polymeric frame; a first electrolyte inlet flow path located within the polymeric frame and coupled to the first electrolyte inlet; and a first electrolyte outlet flow path located within the polymeric frame and coupled to the first electrolyte outlet. In this way, shunt currents may be minimized by increasing the length and/or reducing the cross-sectional area of the electrolyte inlet and electrolyte outlet flow paths.

公开(公告)号：US20210359332A1

公开(公告)日：2021-11-18

申请号：US17308913

申请日：2021-05-05

Applicant: ESS Tech, Inc.

Inventor： Sean Casey ,  Craig Evans ,  Thiago Groberg ,  Yang Song

IPC: H01M8/248 ,  H01M8/18 ,  H01M8/0247

Abstract: Methods and systems are provided for a redox flow battery system. In one example, the redox flow battery system includes a cell stack compressed between terminal structures defining ends of the redox flow battery. The cell stack may be formed of a plurality of cells where each cell includes a deformable positive electrode in contact with a first face of a membrane separator and a negative electrode configured to be less compressible than the positive electrode and arranged at a second face of the membrane separator.

公开(公告)号：US20170200936A1

公开(公告)日：2017-07-13

申请号：US15476795

申请日：2017-03-31

Applicant: ESS TECH, INC.

Inventor： Craig Evans ,  Yang Song

IPC: H01M2/36 ,  H01M8/20 ,  H01M8/04186 ,  H01M8/18

CPC classification number: H01M2/362 ,  H01M2/361 ,  H01M8/04186 ,  H01M8/188 ,  H01M8/20 ,  Y02E60/528 ,  Y10T137/4757

Abstract: In one example, a system for a flow cell for a flow battery, comprising: a first flow field; and a polymeric frame, comprising: a top face; a bottom face, opposite the top face; a first side; a second side, opposite the first side; a first electrolyte inlet located on the top face and the first side of the polymeric frame; a first electrolyte outlet located on the top face and the second side of the polymeric frame; a first electrolyte inlet flow path located within the polymeric frame and coupled to the first electrolyte inlet; and a first electrolyte outlet flow path located within the polymeric frame and coupled to the first electrolyte outlet. In this way, shunt currents may be minimized by increasing the length and/or reducing the cross-sectional area of the electrolyte inlet and electrolyte outlet flow paths.

公开(公告)号：US09685651B2

公开(公告)日：2017-06-20

申请号：US14019491

申请日：2013-09-05

Applicant: ESS TECH, INC.

Inventor： Craig Evans ,  Yang Song

IPC: H01M8/20 ,  H01M2/36 ,  H01M8/18

CPC classification number: H01M2/362 ,  H01M2/361 ,  H01M8/04186 ,  H01M8/188 ,  H01M8/20 ,  Y02E60/528 ,  Y10T137/4757

Abstract: In one example, a system for a flow cell for a flow battery, comprising: a first flow field; and a polymeric frame, comprising: a top face; a bottom face, opposite the top face; a first side; a second side, opposite the first side; a first electrolyte inlet located on the top face and the first side of the polymeric frame; a first electrolyte outlet located on the top face and the second side of the polymeric frame; a first electrolyte inlet flow path located within the polymeric frame and coupled to the first electrolyte inlet; and a first electrolyte outlet flow path located within the polymeric frame and coupled to the first electrolyte outlet. In this way, shunt currents may be minimized by increasing the length and/or reducing the cross-sectional area of the electrolyte inlet and electrolyte outlet flow paths.

公开(公告)号：US09614244B2

公开(公告)日：2017-04-04

申请号：US14019488

申请日：2013-09-05

Applicant: ESS TECH, INC.

Inventor： Craig Evans ,  Yang Song

IPC: H01M8/20 ,  H01M8/0258 ,  H01M8/0247 ,  H01M8/18

CPC classification number: H01M8/188 ,  H01M8/20 ,  Y02E60/528

Abstract: A system for a flow cell for a hybrid flow battery, comprising: a redox plate comprising a plurality of electrolyte flow channels; conductive inserts attached to the redox plate between adjacent electrolyte flow channels; a redox electrode attached to a surface of the redox plate; a plating electrode, comprising: a plurality of folded fins with an oscillating cross-section, the plurality of folded fins comprising: a first planar surface; a second planar surface, parallel to the first planar surface; a plurality of ridges intersecting the first and second planar surfaces such that the plurality of ridges divide the first planar surface into a first plurality of strips, and divide the second planar surface into a second plurality of strips; and a membrane barrier. In this way, the capacity and performance of hybrid flow batteries may be maximized, through decreasing the reaction kinetics, mass transport and ohmic resistance losses at both electrodes.