Patent ID: 7595132

Claim:
A battery, comprising: an electrode assembly including anode plates, cathode plates, and separators; and a battery case having first and second side bonding portions and an upper bonding portion coupled to the first and second bonding portions, the first and second bonding portions configured to be folded toward first and second sides, respectively, of the battery case, for accommodating the electrode assembly and a designated amount of electrolyte, and the electrode assembly being sealed such that two electrode terminals connected to corresponding electrode taps of the anode and cathode plates of the electrode assembly are exposed outside of the battery case, and common portions of the upper bonding portion and the first and second side portions of the battery case having removed portions to form first and second rectangular spaces thereon such that the upper bonding portion of the battery case is configured to be folded toward an upper end of the battery case, the two electrode terminals disposed on the upper bonding portion configured to be bent in a longitudinal direction of the battery case, and first and second inner corners of the upper bonding portion each have a first predetermined large radius of curvature such that the first and second inner corners do not extend to the first and second rectangular spaces, respectively, wherein a protection circuit is disposed on the upper end of the battery case, toward which the upper bonding portion is folded, such that a rear surface of the protection circuit contacts the upper end.