Patent ID: 8906530
Filing Date: 2014-12-09
Classification: H01M,Y02E

Abstract:
1. A battery unit comprising: a battery housing; a module assembly disposed in the battery housing, the module assembly including a plurality of battery modules, the battery modules being stacked and having positive terminals and negative terminals, the module assembly defining a first surface extending along a stacking direction in which the battery modules are stacked and a second surface opposite to the first surface and extending along the stacking direction, the positive terminals and the negative terminals being disposed on the first surface; electrode portions disposed on the positive terminals and the negative terminals of the battery modules, and electrically connecting the positive terminals and the negative terminals of the battery modules; a blower disposed to oppose a side wall of the battery housing, the side wall extending along the stacking direction without facing the first surface and the second surface of the module assembly, the blower having a rotation shaft that is located between a first plane and a second plane, the first plane including the first surface of the module assembly, the second plane including the second surface of the module assembly; and a plurality of fins disposed along the electrode portions, wherein the blower is configured such that air is supplied toward the fins over a range substantially equal to a dimension of the module assembly with respect to the stacking direction, the plurality of fins includes a plurality of sets of fins, each set of fins including a first fin immediately adjacent an upstream end of the battery housing with respect to a direction of a flow of air, a second fin immediately adjacent a downstream end of the battery housing with respect to the flow of air and a third fin disposed between the first fin and the second fin; and the second fin having a length greater than a length of said first fin in the direction of the flow of air to provide a surface area greater than a surface area of said first fin without reducing a cross-sectional area of the flow of air in a plane perpendicular to the direction of the flow of air, the battery unit further comprising: an accommodation member disposed along the first surface of the module assembly to cover at least a portion of the first surface other than the electrode portions; sensors disposed in the battery modules; and wires extending from the sensors, wherein the accommodation member extends in the stacking direction and provides an accommodation space therein for accommodating the wires in the stacking direction, the accommodation member has a wall opposed to the first surface of the module assembly across the accommodation space, and a distance between the first surface of the module assembly and the opposed wall is smaller than a distance between the first surface of the module assembly and the fins.