Patent ID: 8765280
Filing Date: 2014-07-01
Classification: H01M,Y02E

Abstract:
1. A battery pack detachably mountable on a power tool having a body portion containing a battery-driven motor, the battery pack comprising: a case having a first portion and a second portion in which the first portion is inserted into the power tool and the second portion is projected from the power tool when the battery pack is mounted on the power tool, the first portion being provided above the second portion; and a plurality of battery cells including at least a first battery cell, a second battery cell, and a third battery cell, of which at least the first battery cell is disposed in the first portion and at least the second and third battery cells are disposed in the second portion, wherein each of the battery cells in the second portion is arranged in a direction in which the body portion of the power tool on which the battery pack is mounted extends, wherein at least a portion of the first battery cell is disposed inside the power tool when the battery pack is mounted on the power tool, wherein the longitudinal axis of the first battery cell extends in substantially a vertical direction, and wherein the longitudinal axes of the second and third battery cells extend in substantially a horizontal direction.