Patent ID: 7550228

Claim:
A car power source battery apparatus comprising: battery modules provided with a plurality of batteries joined in a straight-line fashion, the battery modules being batteries connected in series and joined in a straight-line fashion either with or without intervention of connecting pieces; a holder case to house the battery modules; wherein battery modules further comprise elastomer cylinders which are cylindrical elements that can flexibly deform and cover boundary regions between connected batteries; wherein an elastomer cylinder is layered on top of both end region surfaces of adjacent batteries, and the center region covers the connection gap at the boundary between batteries; wherein a battery module provided with the elastomer cylinders at connection regions has an outline at the elastomer cylinder regions that is wider than the outline of battery regions, which are not covered by the elastomer cylinder; wherein the holder case has holding compartments to house battery modules, the holder case is divided into a first holder and a second holder to sandwich and hold battery modules in those holding compartments, the inside shape of holding compartments formed by the first holder and the second holder is a cylinder shape narrower than the outline at elastomer cylinder regions, and wider than the outline of battery regions; and wherein battery modules are disposed in cylinder shaped holding compartments the first holder and the second holder are joined together, elastomer cylinder regions are resiliently compressed by inside surfaces of holding compartments to retain battery modules in the holding compartments, and cooling gaps are established between battery regions and inside surfaces of the holding compartments.