Patent ID: 7790309
Filing Date: 2010-09-07
Classification: H01M,Y02E

Abstract:
1. A battery pack, comprising: a casing formed of an insulative material; at least one secondary battery disposed inside the casing, said at least one secondary battery being cylindrical; a control circuit-board disposed inside the casing and provided to charge and discharge said at least one secondary battery; a protection sheet formed of an insulative material and disposed inside the casing, the protection sheet being adapted to a cylindrical contour of the at least one secondary battery such that the protection sheet does not extend entirely around a circumferential direction of the cylindrical contour of the at least one secondary battery, and a first longitudinal edge and a second longitudinal edge of the protection sheet extend in a longitudinal direction transverse to the circumferential direction and are attached with a sealant to an outer surface of said at least one secondary battery along a longitudinal direction of the battery; a positioning rib in contact with one of the longitudinal edges of the protection sheet to set the protection sheet at a predetermined position with respect to the casing, wherein the control circuit-board is disposed across from said at least one secondary battery while the protection sheet is disposed therebetween.