EXPLOSION-PROOF PANEL AND ENERGY STORAGE SYSTEM INCLUDING THE SAME

An explosion-proof panel includes a support portion fixed to a container portion, the container portion accommodating one or more battery modules, a cover portion parallel to the support portion, and a length-adjusting portion configured to adjust a separation distance between the support portion and the cover portion, wherein the cover portion is movable in a first direction according to an internal pressure of the container portion, the separation distance being adjustable.