Rectangular Secondary Battery

Abstract

Provided is a square secondary battery that is capable of reducing the amount of electrolyte compared to the related art. The square secondary battery includes a flat electrode group that is manufactured by winding positive and negative electrodes, a flat square battery can which stores the electrode group, a battery lid that seals an opening of the battery can, and an insulating member which is fixed to the battery lid and stored in the battery can. The square secondary battery includes a storage member made of a bag-like insulating sheet that has a volume smaller than the battery can, is stored in the battery can and stores the electrode group together with the electrolyte. The insulating member adheres to the battery lid to seal a space formed with respect to the battery lid, and is bonded to an opening of the storage member to seal the opening.

Dependencies are inferred from the claim text.