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EP 4 140 008 A1

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(43) Date of publication: 01.03.2023 Bulletin 2023/09 (21) Application number: 21792500.7 (22) Date of filing: 16.04.2021

(51) International Patent Classification (IPC):  H02J 3/38(2006.01) H02J 3/36(2006.01) (52) Cooperative Patent Classification (CPC): H02J 1/106; H02J 7/34; H02J 7/0068; H02J 2310/42; H02J 2300/20 (86) International application number: PCT/CN2021/087673 (87) International publication number: WO 2021/213255 (28.10.2021 Gazette 2021/43)

(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: 20.04.2020 US 202063012284 P 23.07.2020 HK 32020012196 (71) Applicant: Ampd Energy Limited Hong Kong (HK)

(72) Inventors: NG, Brandon Boon Soon Hong Kong Science Park, Shatin, N.T. Hong Kong (HK) HUSSAIN, Shabab Hong Kong Science Park, Shatin, N.T. Hong Kong (HK) GURGEL VALENTE, Luciano Hong Kong Science Park, Shatin, N.T. Hong Kong (HK) KWAN, Lok Shu Hong Kong Science Park, Shatin, N.T. Hong Kong (HK) ALI, Jahan Zaib Hong Kong Science Park, Shatin, N.T. Hong Kong (HK) IP, Clayton Ka Luen Hong Kong Science Park, Shatin, N.T. Hong Kong (HK) (74) Representative: Cabinet Chaillot  16/20, avenue de l'Agent Sarre B.P. 74 92703 Colombes Cedex 92703 Colombes Cedex (FR)