Disclosed is a fast-connectable energy storage battery case for a hard-packaged lithium battery with non-threaded posts. The energy storage battery case comprises a case frame and the hard-packaged lithium battery installed in the case frame. The bottom of the case frame is provided with a case pedestal; the case pedestal is provided with a spring strip; and a line connecting bank with wiring terminals embedded in is arranged at the top of the case frame and is located above the hard-packaged lithium battery, wherein the wiring terminals are corresponding to the posts of the hard-packaged lithium battery one to one. The spring strip acts on and applies elastic force to the bottom of the hard-packaged lithium battery, so that the posts closely contact with the wiring terminals. The hard-packaged lithium battery is locked and firmly fixed in a housing of the battery case, and is capable of being fast inserted, pulled out, and replaced. Heat dissipating capacity can be increased through a cooling fin arranged outside the battery case, and stable operation of the battery is ensured. Through-holes in the upper part of the case frame can be connected in a group to satisfy the requirement of capacity expansion. According to the invention, troubles of threaded connection of posts of the hard-packaged lithium battery and welding of connection chips are avoided; the connection internal resistance is reduced; a hidden trouble of poor contact doesn't exist; and the operation is simple.