Hitachi Vehicle Energy, Ltd.

Tatsuo Ono

Tunemi Aiba

Takeyuki Goto

Toshiaki Onuki

The present invention provides a secondary battery module which is excellent in vibration resistance. A battery modulehas assembled battery blockseach constituted by screw-fixing the assembled batteriesto the block basessupporting a lower portion thereof and the two block reinforcing platessupporting an upper portion thereof, the six assembled batteriesare sandwiched by and fixed firmly to the block basesand the block reinforcing plates. The assembled batteriesdo not move freely even if vibration is added to the battery module. Because the elastic sheetis laid between the block basesand the assembled batteries, since a space derived due to variance in size accuracy of frameswhich hold and fix the unit cellsand derived due to variance in size accuracy of the block basescan be removed, and vibration resistance can be enhanced. To thermal stress change caused due to combination of different materials, influence thereof can be reduced by laying the elastic sheet

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Mitaka, Japan

Tatsuo Ono