FIG. 14 is a view illustrating a thin pouch-type battery in the related art disclosed in Japanese Patent Unexamined Publication No. 2000-173559.
As illustrated in FIG. 14, laminate film 201 disposed on the upper side and laminate film 202 disposed on the lower side are sealed with a positive electrode and a negative electrode and an electrolyte therebetween. Wave shapes 203, which extend straightly in one direction and are arranged parallel to each other, are formed on surfaces of laminate films 201 and 202, respectively, such that flexibility of laminate films 201 and 202 is enhanced.
FIGS. 15A and 15B are views illustrating a manufacturing process of the thin pouch battery.
As illustrated in FIG. 15A, straight continuous wave shapes are formed in parallel at equal intervals on the laminate film of the thin pouch battery. Next, as illustrated in FIG. 15B, the laminate film is folded back with, bending position 206 as a base position and electrode group 207 including a positive electrode, a negative electrode, a separator, an electrolyte, or the like is inserted in the folded laminate film. Then, adhesion is performed on three sides except for the folded portion, and thus the thin pouch battery is obtained.
SUMMARY
FIGS. 16A and 16B are views illustrating a state in which an external force is applied to the thin pouch battery and the thin pouch battery is curved.
