Battery pack with filling material and supports and manufacturing method therefor

1 . A battery pack, comprising:

a frame having an inner space and an opened one side;

a plurality of battery cells each having one end disposed in the inner space of the frame and the other end protruding to an outside of the frame through the opened one side of the frame;

a cell holder at one side of the frame and having a plurality of insertion holes to which the other ends of the battery cells are respectively inserted;

a heat sink on the cell holder to cool the battery cells;

a plurality of supports disposed in a portion of a space between the battery cells; and

a filling material filled in a remaining space in which the supports are not disposed in the space between the battery cells,

wherein a filled amount of the filling material is adjusted according to a number of the supports, and

wherein the cell holder includes a plurality of cell holders, and the plurality of cell holders are stacked in a vertical direction.

2 . The battery pack of claim 1 , wherein each of the supports is disposed along a flat surface shape of the space between the battery cells and extends less than a height of the inner space of the frame.

3 . The battery pack of claim 2 , wherein the battery cells form groups, wherein corresponding battery cells in each group are disposed along one direction so that the groups are disposed in a row along a direction perpendicularly crossing the one direction, and wherein each of the groups comprises a same number of battery cells.

4 . The battery pack of claim 2 , wherein the battery cells form groups, wherein corresponding battery cells in each group are disposed along one direction so that the battery cells are alternately disposed in a direction perpendicularly crossing the one direction, and

wherein each of the supports has a shape in which a circumference of a flat surface of a corresponding one of the supports has three sides.

5 . The battery pack of claim 4 , wherein each of the sides of the circumference of the flat surface of the corresponding one of the supports has one of a curved shape or a straight line shape.

6 . The battery pack of claim 1 , wherein the supports occupy 10% or more to 40% or less of a volume of an entire space between the battery cells.

7 . The battery pack of claim 1 ,

wherein the frame has multiple sides,

wherein a first side of the multiple sides is closed in that the first side has a side surface extending entirely from a ceiling surface of the frame to a lowest part of the frame, and

wherein a second side of the multiple sides is open entirely from the ceiling surface of the frame to the lowest part of the frame.

8 . The battery pack of claim 1 , wherein the supports extend vertically from a ceiling surface of the frame to a top surface of the cell holder.

9 . The battery pack of claim 1 ,

wherein the plurality of cell holders include a first cell holder and a second cell holder stacked in the vertical direction;

wherein an entire lower surface of the first cell holder is planar, and the entire lower surface is coextensive with the first cell holder in plan view;

wherein an entire upper surface of the second cell holder is planar, and the entire upper surface is coextensive with the second cell holder in plan view;

wherein the entire lower surface of the first cell holder is in direct contact with the entire upper surface of the second cell holder.