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|1. (WO2017154999) BATTERY PACK|
|Applicants:||NISSAN MOTOR CO., LTD.
[Problem] To provide a battery pack allowing, even if an electrode surface area is large, an appropriate pushing pressure to be applied readily onto a layered body comprising single cells that have been layered. [Solution] The invention comprises: the layered body 140 wherein single cells 10 are layered; a cell case 120 having a first opening portion 126 and having the layered body 140 disposed therein; and a first lid member 170 sealing the first opening portion 126. The first opening portion 126 is positioned in such a manner as to face a surface 142 of the layered body 140 in the single cell layering direction S. The first lid member 170 is configured in such a manner that, if the internal pressure of the cell case 120 is lower than the atmospheric pressure, the first lid member 170 deforms while maintaining a sealed state, abuts the surface 142 of the layered body 140, and applies onto the abutted surface a pressure that is based on the pressure difference between the atmospheric pressure and the cell case 120 internal pressure.