MIDDLE OR LARGE-SIZED BATTERY PACK WITH IMPROVED SAFETY

摘要

The present invention is a middle or large-sized battery pack, comprising: an assembly of multiple battery modules arranged such that they are electrically interconnected and adjoined to each other in a lateral direction, each of the battery modules constituted of a multiplicity of battery cells or unit modules connected in series and built in a module case; a pair of lateral face support elements for encompassing lateral faces of the outermost battery modules in the assembly; and at least one top-to-top connection element for connecting the lateral face support members in a direction from the top of the assembly, wherein at least one of the pair of lateral face support elements has, on a portion thereof, a weak region (weak part) against volume expansion, to cut power supply by inducing local transformation of the battery module in the event of the occurrence of swelling.