Battery pack exhibiting enhances structural strength

摘要

There is provided a battery pack in which a pair of ribs are formed at an inner frame to extend toward plane portions of a bare cell, so that the inner frame can be fixed at the exact position of the bare cell. In one embodiment, a battery pack includes a bare cell having a pair of first side portions opposite to each other, a pair of second side portions opposite to each other, and a pair of plane portions opposite to each other. The second side portions and the plane portions are connected to ends of the first side portions. A protection circuit module is electrically connected to the bare cell. An inner frame is provided between the bare cell and the protection circuit module. The inner frame has at least a pair of ribs opposite to each other while extending toward the plane portions of the bare cell.

主权项

1. A battery pack comprising:
a bare cell having a can that receives an electrode assembly, wherein the can of the bare cell also has a pair of first side portions opposite to each other, a pair of second side portions opposite to each other, and a pair of plane portions opposite to each other, the second side portions and the plane portions being connected to ends of the first side portions; a protection circuit module electrically connected to the bare cell; an inner frame provided between the bare cell and the protection circuit module, the inner frame having at least a pair of ribs opposite to each other while extending over a part of the plane portions of the can of the bare cell wherein the inner frame covers at least a portion of one of the first side portions of the can of the bare cell and at least a portion of the second side portions of the can of the bare cell and wherein the ribs extend over the part of the plane portions of the can of the bare cell adjacent the one of the first side portions so as to directly contact the plane portions of the can and the second side portions of the can of the bare cell; and an outer frame for accommodating the bare cell, the protection circuit module and the inner frame, the outer frame being formed so that the pair of plane portions of the bare cell are exposed and so that the outer frame overlies the inner frame over at least a portion of the second side portions of the bare cell wherein at least one of the pair of ribs of the inner frame extending over the part of the plane portion defines at least one protrusion that extends outward from the plane of the plane portion of the cells and wherein the outer frame defines an edge with at least one opening formed so as to extend from the edge and so as to be parallel to the plane of the plane portions of the bare cell and wherein the at least one protrusion is positioned within the at least one opening in the outer frame.