Patent ID: 7989101
Filing Date: 2011-08-02
Classification: H01M,Y02E

Abstract:
1. A battery device having an approximately rectangular parallelepiped battery enclosure incorporating a battery cell and an output terminal which is placed to expose an output portion in an approximate center of at least a first surface of the battery enclosure in a crosswise direction and outputs power of the battery cell, the battery enclosure comprising: a second surface approximately perpendicular to the first surface; a first step surface provided continuously with and approximately parallel to the second surface with a predetermined step on one side of the second surface in the crosswise direction; a second step surface provided continuously with and approximately parallel to the second surface with a predetermined step on the other side of the second surface in the crosswise direction; a first engaging portion protruding from one side of the second surface with predetermined width and thickness in the crosswise direction; a second engaging portion protruding from the other side of the second surface with predetermined width and thickness in the crosswise direction; a first groove formed in the first step surface and the first engaging portion; and a second groove formed in the second step surface and the second engaging portion, wherein a recess is provided in at least one of the first step surface and the second step surface.