(19)

(11)

EP 4 824 569 A1

(12)

(43) Date of publication: 21.10.2026 Bulletin 2026/43 (21) Application number: 23829001.9 (22) Date of filing: 11.12.2023

(51) International Patent Classification (IPC):  G01R 31/392(2019.01) G01R 31/367(2019.01) (52) Cooperative Patent Classification (CPC): G01R 31/392; G01R 31/367; H01M 10/0525; H01M 10/425; H01M 2010/4271 (86) International application number: PCT/EP2023/085155 (87) International publication number: WO 2025/124686 (19.06.2025 Gazette 2025/25)

(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: KH MA MD TN (71) Applicant: Mondragon Goi Eskola Politeknikoa Jose Maria Arizmendiarrieta, S.COOP. 20500 Arrasate-Mondragon (ES)	(72) Inventors: LOPETEGUI, Iker 20500 Arrasate-Mondragon (ES) OCA, Laura 20500 Arrasate-Mondragon (ES) MIGUEL, Eduardo 20500 Arrasate-Mondragon (ES) IRAOLA, Unai 20500 Arrasate-Mondragon (ES) (74) Representative: Galbaian S.Coop.  Garaia Parke Teknologikoa Goiru kalea 1 20500 Arrasate-Mondragón 20500 Arrasate-Mondragón (ES)