EP4261806A1
EP4261806A1 EP22901487.3A EP22901487A EP4261806A1 EP 4261806 A1 EP4261806 A1 EP 4261806A1 EP 22901487 A EP22901487 A EP 22901487A EP 4261806 A1 EP4261806 A1 EP 4261806A1 Authority EP European Patent Office Prior art keywords slitter training user secondary battery quality Prior art date 2021-11-30 Legal status (The …