FIG. 1 is a view illustrating a state in which a thin pouch battery is curved in a right-left direction and in a front-rear direction.

FIG. 2 is a view illustrating a thin pouch battery in which a concave-convex wave-shaped crest ridge or a trough furrow formed on a top surface of a protrusion of a laminate film has a step shape, in Embodiment 1.

FIG. 3 is a view illustrating a manufacturing process of the thin pouch battery.

FIG. 4 is a view illustrating a thin pouch battery in which a concave-convex wave-shaped crest ridge or a trough furrow formed on a top surface of a protrusion of a laminate film has a square undulating shape, in Embodiment 2.

FIG. 5 is a view illustrating a thin pouch battery in which an angle is formed between a side surface of a protrusion and a concave-convex wave-shaped crest ridge or a trough furrow formed on a top surface of the protrusion of a laminate film, in Embodiment 3.

FIG. 6 is a view illustrating a thin pouch battery in which a concave-convex wave-shaped crest ridge or a trough furrow formed on a top surface of a protrusion of a laminate film is concentric, in Embodiment 4.

FIG. 7 is a view illustrating a thin pouch battery in which a convex shape is formed on a top surface of a protrusion of a laminate film, in Embodiment 5.

FIGS. 8A and 8B are sectional views illustrating a thin pouch battery in which a side surface of a protrusion, of a laminate film is inclined, in Embodiment 6.