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EP 4 771 727 A1

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(43) Date of publication: 08.07.2026 Bulletin 2026/28 (21) Application number: 24860966.1 (22) Date of filing: 28.08.2024

(51) International Patent Classification (IPC):  H02J 3/32(2026.01) F24H 1/20(2022.01) H01M 50/204(2021.01) H02J 7/00(2026.01) F24H 9/20(2022.01) H01M 50/251(2021.01) (52) Cooperative Patent Classification (CPC): F24H 2240/09; F24H 4/04; F24D 18/00; F24H 2240/01; F24H 9/25; F24H 9/2021; F24H 15/421; F24H 15/281; F24H 15/375; F24H 15/223; F24H 15/174; F24H 15/37 (86) International application number: PCT/US2024/044267 (87) International publication number: WO 2025/049630 (06.03.2025 Gazette 2025/10)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: GE KH MA MD TN (30) Priority: 28.08.2023 US 202363535023 P (71) Applicant: Channing Street Copper Company Berkeley, CA 94710 (US)

(72) Inventors: CALISCH, Samuel Oakland, California 94608 (US) GILMAN, Tucker Oakland, California 94608 (US) GOLDWATER, Dan Amherst, Massachusetts 01002 (US) WILHELM, Eric Oakland, California 94602 (US) KOSECOFF, David San Francisco, California 94118 (US) PANDA, Pushan Chandra San Francisco, California 94116 (US) SMITH, Miles Cambridge, Massachusetts 02139 (US) THOMAS, Kaitlyn Berkeley, California 94702 (US) HEINRICH, Mitchell Oakland, California 94609 (US) (74) Representative: Forresters IP LLP  Skygarden Erika-Mann-Straße 11 80636 München 80636 München (DE)