(19)

(11)

EP 4 241 357 A1

(12)

(43) Date of publication: 13.09.2023 Bulletin 2023/37 (21) Application number: 20803517.0 (22) Date of filing: 05.11.2020

(51) International Patent Classification (IPC):  H02J 3/32(2006.01) H02J 4/00(2006.01) H02J 3/38(2006.01) H02J 3/18(2006.01) (52) Cooperative Patent Classification (CPC): H02J 3/32; H02J 3/38; H02J 4/00; H02J 3/1807; Y02E 40/30 (86) International application number: PCT/EP2020/081159 (87) International publication number: WO 2022/096106 (12.05.2022 Gazette 2022/19)

(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 (71) Applicant: Hitachi Energy Switzerland AG 5400 Baden (CH)	(72) Inventor: MAJUMDER, Ritwik 723 44 Västerås (SE)