Battery pack including insulating tube

A battery pack comprising:

• a plurality of can type secondary batteries arranged to be laid down in a horizontal direction;
• a bus bar at least partially formed of an electrically conductive material to electrically connect the plurality of can type secondary batteries;
• at least one module case with a space therein to accommodate the plurality of can type secondary batteries;
• and
• an insulating tube configured to surround an outer wall of the module case and having an outer surface on which a plurality of outward direction embossing structures, each having a part protruding in an outward direction, are formed,
• wherein the module case comprises:
• a first case having an empty space to accommodate the plurality of can type secondary batteries;
• and
• a second case coupled to one side of the first case in a horizontal direction and having an empty space to accommodate the plurality of can type secondary batteries,
• wherein the insulating tube comprises a heat shrinkable material that is heat shrunk such that the first case and the second case are tightly fixed to each other,
• wherein the insulating tube comprises a band portion extending in a band shape to surround an outside of the module case at a portion corresponding to a coupling interface between the first case and the second case where the outward embossing structures are absent, the band portion having a greater thickness than other parts of the insulating tube, and
• wherein the insulating tube is provided to prevent a contact between the bus bar provided therein and an external component or an external material of electrical conductivity and wholly surrounds the outer walls of the module case on which the bus bars are provided.