Battery device

Abstract

Battery device, characterized in that it comprises: a housing body (2) which is provided internally with a receiving chamber; a cell (1) which is arranged in the receiving chamber, wherein the cell (1) consists of at least several layers of electrode foils and a separator (13), wherein two adjacent layers of the electrode foils are separated from each other by the separator (13) and stacked on top of each other to form a stacked structure; and wherein each layer of the electrode foil is provided with a coating (15), wherein the electrode foils of adjacent layers have opposite polarities; wherein, in a stacking direction of the stacked structure, the stacked structure is successively provided with a first layer region, a second layer region and a third layer region, wherein the first layer region and the third layer region comprise at least one layer of the electrode foil;and wherein each coating (15) on the electrode foil of each layer in the second layer region is provided with recessed holes (14); wherein in the second layer region an area of ​​the coating (15) on the electrode foil of each layer is K1, wherein a total area occupied by all recessed holes (14) is K2, wherein the unit of the area is mm², wherein a stacking thickness of the stacked structure is D and the unit is mm, and wherein 15 ≤ D / (K2 / K1) ≤ 200.;