Patent ID: 8603657
Filing Date: 2013-12-10
Classification: H01M,Y02E

Abstract:
1. A battery pack which is loaded and unloaded to and from a battery mounting portion while sliding one surface thereof along a sliding axis in said battery mounting portion, comprising: a pair of longitudinal insertion guide grooves formed substantially in a center of a width of a lower surface of the battery pack and extending along the sliding axis which is perpendicular to the width of the lower surface, the pair of longitudinal insertion guide grooves are positioned colinearly and spaced apart on the lower surface along the sliding axis, and provided on opposite sides of the lower surface of the battery pack, wherein each longitudinal insertion guide groove has an open end portion that opens on a respective end side surface of a battery main body so that the pair of longitudinal insertion guide grooves open in opposite directions along the sliding axis, and one of the open end portions is provided with a lock recess by which a lock piece is locked, the lock piece being provided on the battery mounting portion and positioned so as to come in contact with the lower surface of the battery pack in the center of the width of the lower surface, the lock recess extends from the longitudinal insertion guide groove with the one of the open end portions, wherein a width and a depth of the lock recess is greater than a width and a depth of the longitudinal insertion guide groove with the one of the open end portions, the lock recess is formed on a back end side surface of the battery pack, wherein the back end side surface faces a direction opposite from a direction of loading the battery pack to the battery mounting portion, each longitudinal insertion guide groove is provided with an inner end portion opposite to a respective open end portion, and a continuous flat section of the lower surface extends between the inner end portions over a substantial length of the lower surface such that the continuous flat section is longer than at least one of the longitudinal insertion guide grooves.