Patent ID: 7997368
Filing Date: 2011-08-16
Classification: B60K,B60R,H01M,Y02E

Abstract:
1. A battery case for an electric vehicle for containing therein battery modules, comprising: a tray member for supporting the battery modules; a cover member to be put on top of the tray member, and fixed to the tray member, the tray member including a resin section constituted of a peripheral wall and bottom wall formed of a resin, an insert structure including at least one insert member embedded in the peripheral wall, and a seal member applied to a joint part between the tray member and cover member, and the insert member including an embedded bolt arranged in the peripheral wall in such a manner that a threaded part thereof protrudes from the joint part of the tray member, and embedded nuts arranged in the peripheral wall of the tray member at positions different from the embedded bolt; the battery case further comprising: first fastening sections each of which is formed by screwing a nut member onto the embedded bolt, and fastening the nut member in a state where the cover member is put on top of the tray member; and second fastening sections each of which is formed by screwing a bolt member into the embedded nut, and fastening the bolt member in the state where the cover member is put on top of the tray member, wherein a first collar made of metal is arranged in a hole of a peripheral edge part of the cover member into which the embedded bolt is inserted, the first collar is interposed between the insert member and the nut member, a second collar is arranged in a hole of the peripheral edge part of the cover member into which the bolt member is inserted, and the second collar is interposed between the insert member and a head section of the bolt member.