Sealing features in metal-air battery cells for the prevention of electrolyte leakage

摘要

A leak-proof, prism-shaped, metal-air battery cell made from at least two mutually engaging casing elements to form a prism shaped structure. The casing elements are engaged to create a stress-generated seal between the casing elements that prevents electrolyte and other components from exiting the battery cell. The casing elements are separated by a sealing element where at least some of the stress is generated. The stresses are generally in the axial direction, and the casing elements are engaged and shaped to create this generally axial stress. The inner casing element is preferably shaped with side walls that flare outwards to prevent collapse and to improve electrical connectivity. The axial stress compensates for the lack of radial or hoop strength that are exhibited in button shaped battery cells.