Nec Energy Devices, Ltd.

Makoto Unno

Provided is a battery pack capable of improving volumetric efficiency while reducing the thickness of the entire battery. The battery pack is configured by laminating a plurality of film-sheathed batteries () each including power generating element () and film sheath material () in which internal space () is formed for housing power generating element () along with an electrolyte. Power generating element () includes main surfaces () that are positioned on both sides in a lamination direction, and side surfaces () that are adjacent to main surfaces (). Film sheath material () includes housing part () that is provided with main surface covering sections () for covering main surfaces () and side surface covering sections () for covering side surfaces (), main surface covering sections () and side surface covering sections () forming internal space (), and sealing parts () that protrude from side surface covering sections () to seal internal space (). In one film sheath material, sealing partsare bonded to side surface covering sections () of the other film sheath material that is adjacent to the one film sheath material in the lamination direction.

Battery pack

The object of the present invention is to provide a battery pack that can reduce the thickness of the entire battery while ensuring that the film-packaged batteries adhere to each other. The battery pack of the present invention includes: film-packaged battery assemblyof multiple laminated film-packaged batteries, each film-packaged battery including power generation elementand film-wrappingforming an interior spacethat can house power generation elementalong with electrolyte; and, at least one fixing memberthat faces the side face of film-packaged battery assembly. Film wrappingincludes casing partthat forms interior spaceand sealing partthat extends from casing partto fixing memberto seal interior space. Sealing partis inserted in slitthat is formed in fixing memberand that is fixed therein to fixing member

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Kanagawa, Japan

Makoto Unno