Although a composite sheet and a battery pack in one or plural aspects have been described above based on the above-described exemplary embodiments, the present invention is not limited to those exemplary embodiments. Other embodiments which can be constructed by making various modifications that may be conceived by a person skilled in the art to the above-described exemplary embodiments and other embodiments which can be constructed by combining components of different exemplary embodiments or their modifications may be included within the scope in one or more aspects.

The present disclosure is applicable to composite sheets for dissipating heat of, for example, battery packs.

• 11 composite sheet
• 12 thermally-conductive sheet
• 12a, 12b surface
• 13 first insulating sheet
• 14 second insulating sheet
• 15 first through hole
• 16 second through hole
• 17 inner wall surface
• 18 insulating lamination portion
• 14c adhesive layer
• 14d first surface
• 14e second surface
• 21 end portion
• 22 first region