Battery device

Abstract

Battery device characterized in that it comprises: a housing body wherein a receiving cavity is arranged inside; a battery cell (1) arranged in the receiving cavity, wherein the battery cell (1) has a winding structure, the winding structure being formed by stacking two electrode sheets with separators in between and subsequent winding, and wherein a coating (14) is arranged on each electrode sheet; wherein a total of n layers are wound in the winding structure and at least one circular arc section (17) is arranged; wherein the circular arc section (17) comprises an outer layer region and an inner layer region, wherein recessed holes (13) are arranged in the inner layer region on the coating (14) of the circular arc section (17) of each layer of the electrode sheet;and wherein in one area unit of each electrode sheet, an area fraction of the recessed holes (13) on the coating (14) is m² and 23 ≤ n / m² ≤ 400 applies.;