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EP 4 108 051 A1

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(43) Date of publication: 28.12.2022 Bulletin 2022/52 (21) Application number: 20808314.7 (22) Date of filing: 12.11.2020

(51) International Patent Classification (IPC):  H05B 47/19(2020.01) H04W 4/80(2018.01) H05B 47/16(2020.01) (52) Cooperative Patent Classification (CPC): H05B 47/19; H05B 47/16; H04W 4/80; H04L 67/12; H04W 56/0015; Y02B 20/40; Y02D 30/70 (86) International application number: PCT/EP2020/081975 (87) International publication number: WO 2021/164906 (26.08.2021 Gazette 2021/34)

(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: 21.02.2020 CN 202010108537 (71) Applicants: Self Electronics Co., Ltd. Ningbo City, Zhejiang 315103 (CN) SELF ELECTRONICS Germany GmbH 51149 Köln (DE) Lin, Wanjiong Ningbo City, Zhejiang 315103 (CN)

(72) Inventors: DONG, Jianguo Ningbo, Zhejiang 315103 (CN) ZHANG, Jian Ningbo, Zhejiang 315103 (CN) ZHAO, Pengyuan Ningbo, Zhejiang 315103 (CN) ZOU, Huimin Ningbo, Zhejiang 315103 (CN) WU, Liang Ningbo, Zhejiang 315103 (CN) (74) Representative: 2K Patentanwälte Blasberg Kewitz & Reichel  Partnerschaft mbB Schumannstrasse 27 60325 Frankfurt am Main 60325 Frankfurt am Main (DE)