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EP 4 348 743 A1

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(43) Date of publication: 10.04.2024 Bulletin 2024/15 (21) Application number: 22843040.1 (22) Date of filing: 13.07.2022

(51) International Patent Classification (IPC):  H01M 8/18(2006.01) H01M 8/04276(2016.01) H01M 8/04089(2016.01) H01M 4/96(2006.01) H01M 8/24(2016.01) H01M 8/04186(2016.01) H01M 8/0258(2016.01) H01M 4/92(2006.01) (52) Cooperative Patent Classification (CPC): Y02E 60/50; H01M 8/18; H01M 8/04186; H01M 8/04089; H01M 8/0258; H01M 8/2432; H01M 8/2483; H01M 8/2495; H01M 8/0606; H01M 8/0662; H01M 8/188; H01M 8/04283 (86) International application number: PCT/US2022/073693 (87) International publication number: WO 2023/288251 (19.01.2023 Gazette 2023/03)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 13.07.2021 US 202163221325 P 13.07.2021 US 202163221330 P (71) Applicant: ESS Tech, Inc. Wilsonville, Oregon 97070 (US)	(72) Inventors: KISSICK, Sean Portland, Oregon 97202 (US) SONG, Yang West Linn, Oregon 97068 (US) EVANS, Craig West Linn, Oregon 97068 (US) (74) Representative: von Tietzen und Hennig, Nikolaus  Lorenz Seidler Gossel Rechtsanwälte Patentanwälte Partnerschaft mbB Widenmayerstraße 23 80538 München 80538 München (DE)