Patent ID: 7803482
Filing Date: 2010-09-28
Classification: H01M,Y02E,Y02P

Abstract:
1. A battery comprising: a battery stack body including a plurality of stacks of secondary batteries in each of which electrode plates, stacked via a separator, are accommodated and sealed in an outer sheath member, with electrode terminals correspondingly connected to the electrode plates and extracted from an outer peripheral edge of the outer sheath member; a pair of plate-like members, stacked as outermost layers of the battery stack body, respectively, so as to be opposed to each other; and a pressing mechanism pressing the plurality of secondary batteries via the pair of plate-like members with at least four pressing points, wherein at least one of the pair of plate-like members has a characteristic exhibiting a highest rigidity at a pressing center thereof determined based on a plurality of pressing points of the at least one of the pair of plate-like members that are pressed by the pressing mechanism, wherein the at least one of the pair of plate-like members is formed with a plurality of ribs, wherein the at least one of the pair of plate-like members is configured to provide a cooling flow across a space between the plurality of ribs so as to cool the secondary batteries, and wherein the plurality of ribs are formed in clearance pattern such that the closer to the pressing center, the smaller will be a clearance of the plurality of ribs.