Battery Pack

Abstract: The present invention relates to a battery pack which can suppress swelling which may occur in a battery module accommodated therein and includes an auxiliary partition wall which is easy to attach and detach. More specifically, the battery pack of the present invention is characterized by comprising a pack case including a module area on which a cell stack is placed, wherein the pack case comprises: a base plate supporting the lower part of the cell stack; a main partition wall formed to extend across the base plate and vertically coupled to the center of the base plate; side walls vertically coupled along the edges of the base plate; and an auxiliary partition wall composed of a pair of reinforcement plates combined with each other and connected to the main partition wall and the side walls at both ends, wherein the reinforcement plates are formed to protrude and include a plurality of reinforcement ribs extending along the longitudinal direction of the auxiliary partition wall.

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