BATTERY PACK AND LOWER CASE

An aspect of a battery pack according to the present disclosure is a battery pack including: a pond structure part in which a plurality of walls are formed so as to surround an area where the top surface of the heat dissipation projection is exposed is formed at a position corresponding to an electrode component attached to the battery cell, and the pond structure part is filled with a thermally conductive agent, the passage is formed so as to extend in the row direction in an area adjacent to the plurality of thermally conductive agent filling parts, and a thermally conductive agent amount control wall that faces the passage is formed in such a way that a height of the thermally conductive agent amount control wall is the lowest of the plurality of walls in each of the plurality of thermally conductive agent filling parts.