Middle or large-sized battery pack assembly

摘要

Disclosed herein is a battery pack including (a) a module assembly including two or more battery modules, each of which includes a chargeable and dischargeable battery cell, the battery modules being stacked to have a two layer structure including an upper layer and a lower layer while being in contact with each other in a lateral direction, (b) a first upper layer connection member and a second upper layer connection member mounted at the upper layer module assembly, (c) a first lower layer connection member and a second lower layer connection member mounted at the lower layer module assembly, (d) a pair of side support members, (e) insulation members mounted at interfaces between the sides of the upper and lower layer module assemblies and the side support members, and (f) a first lower end support member and a second lower end support member.

主权项

1. A battery pack comprising:
an upper layer module assembly comprising two or more upper layer battery modules lying in a first plane; a lower layer module assembly comprises two or more lower layer battery modules lying in a second plane, parallel and offset from the first plane; each module comprises a chargeable and dischargable battery cell; a first direction is defined by the stacking direction of the battery modules of the upper layer module assembly and the lower layer module assembly; a pair of side support members surround sides of the upper and lower layer module assemblies; a first upper layer connection member mounted at an upper surface of the upper layer module assembly to surround a portion of opposite sides and a front upper end of the battery modules of the upper layer module assembly, and a second upper layer connection member mounted at the upper surface of the upper layer module assembly to surround a portion of the opposite sides and a rear upper end of the battery modules of the upper layer module assembly, each of the first and second upper layer connection members comprises a frame body formed in a bracket shape in vertical section to simultaneously surround a portion of the opposite sides and the front upper end or the rear upper end of the module assembly, and coupling parts extending from opposite sides of the frame body such that the coupling parts are coupled to the side support members; a first lower layer connection member mounted at a lower surface of the lower layer module assembly to surround a portion of opposite sides and a front lower end of the battery modules of the lower layer module assembly, and a second lower layer connection member mounted at the lower surface of the lower layer module assembly to surround a portion of the opposite sides and a rear lower end of the battery modules of the lower layer module assembly, each of the first and second lower layer connection members comprises a frame body formed in a bracket shape in vertical section to simultaneously surround a portion of the opposite sides and the front lower end or the rear lower end of the module assembly, and coupling parts extending from opposite sides of the frame body such that the coupling parts are coupled to the side support members; the pair of side support members coupled to the upper layer connection members and the lower layer connection members; interfaces between the sides of the upper and lower layer module assemblies and the side support members comprise insulation members mounted thereto; a first lower end support member is coupled to the first lower layer connection member, has a length which is longer than a length of the first lower layer connection member in the first direction, and is coupled to the side support members in a second direction perpendicular to the first direction, and a second lower end support member is coupled to the second lower layer connection member, has a length which is longer than the length of the second lower layer connection member in the first direction, and is coupled to the side support members in the second direction.