Patent ID: 7914922
Filing Date: 2011-03-29
Classification: H01M,Y10T

Abstract:
1. A battery pack of an assembled battery comprising: an assembled battery including a plurality of flat-shaped cells that are hermetically sealed by a laminate film; a plurality of trays each formed of a thin metal plate, each cell placed on a respective tray, each tray including opposing peripheral edges formed with fitting engaging parts, respectively, by which adjacent trays come into fitting engagement with each other when the trays are vertically laminated, wherein each of the fitting engaging parts includes at least first and second extending portions extending substantially perpendicular to the tray on a first edge portion of the tray separated by a portion having no extending portion, and a third extending portion on a second edge portion of the tray, opposite the first edge portion, extending substantially perpendicular to the tray from a same face of the tray and in a same direction that the first and second extending portions extend, and having a width and positioning matching the portion having no extending portion on the first edge of the tray, so that when the trays are laminated, the extending portions of one tray are inserted into and engaged with the portions having no extending portions of another tray adjacently laminated on the one tray; a case for accommodating the cells in a state in which the cells are laminated in a thickness direction thereof while being placed on the trays, the case having an opening formed at least at one end thereof, the plurality of trays being fitted inside the case; a lid member for pressing the cells, which are laminated while being placed on the trays, from one end of the opening of the case in a laminating direction; and a fixing member for fixing the lid member to the case at a position to which a predetermined pressing force is applied.