Stack housing for battery modules and battery system including the same

A battery system for electric vehicles, comprising:

• a stack housing comprising:
• a multi-case that defines a plurality of loading compartments that are arranged side by side and have a predetermined height, each of the plurality of loading compartments being configured to receive a plurality of battery modules,
• an arched mount that connects the plurality of loading compartments, the arched mount defining a space between the plurality of loading compartments,
• a stack layer coupled to a top of the arched mount, the stack layer defining a frame that supports the plurality of battery modules stacked in the multi-case, and
• a plurality of damping brackets, each of the plurality of damping brackets having (i) a first end and a second end that are attached to the stack layer and (ii) a middle portion that is downwardly bent and coupled to the arched mount;
• a single-layer module array of battery modules disposed in at least one of the plurality of loading compartments;
• a middle plate coupled to at least a part of an upper surface of the single-layer module array;
• a double-layer module array of battery modules positioned at a top of the stack layer;
• and
• a top plate coupled to the upper surface of the double-layer module array.