Battery can, and battery using the battery can

Battery case for electrolytic battery comprising an electrode assembly and an electrolyte, said case comprising:

• a closed-end hollow tubular outer metal case;
• a first plurality of ridges, spaced apart from one another, on at least a portion of an inner surface of said metal case, projecting from said inner surface of said metal case inwardly toward an interior of said metal case, and extending linearly at a first angle with respect to a central longitudinal axis of said metal case;
• and
• a second plurality of ridges, spaced apart from one another, on said at least a portion of said inner surface of said metal case, projecting from said inner surface of said metal case inwardly toward an interior of said case, and extending linearly at a second angle with respect to a central longitudinal axis of said metal case;
• such that said first and second pluralities of ridges intersect one another and are connected to one another at points of intersection to form a grid on said at least a portion of said inner surface of said metal case.