Patent ID: 7964303

Claim:
A structure of a thin battery comprising: a battery cell formed in a flat and approximately rectangular shape having top and bottom surfaces and four side surfaces, a positive pole formed on a first side surface and a negative pole formed on a second side surface which is opposite the first side surface; a rectangular frame portion formed by only four side surfaces accommodating the four side surfaces of said battery cell, a height of a side surface of the frame portion, corresponding to the negative pole, being substantially equal to a height of the battery cell at its most inflated condition during charging or in a high temperature, and a height of a remaining three side surfaces of the frame portion being less than the height of the side surface corresponding to the negative pole; a circuit board unit disposed on an outer side surface of said frame portion corresponding to the positive pole; a cap portion mounted on one end of said frame portion and said battery cell so as to sandwich said circuit board unit with said outer side surface of said frame portion; and an outer packaging film integrally covering a part of said cap portion, said top and bottom surfaces of said battery cell, and two of the side surfaces of said frame portion.