Battery pack having support structure for supporting plurality of battery cells

A battery pack, comprising:

• a plurality of battery cells;
• and
• a frame having an opening in which a respective one of the battery cells is installed, an edge of the opening including a support portion contacting a side of the respective battery cell, the support portion having a curved surface corresponding to a surface of the respective battery cell and extending into the opening, the support portion having a tapered cross-section corresponding to the curved surface, the curved surface extending along a longitudinal length of the side of the battery cell, wherein:
• the battery cell has a rectangular shape having first, second, third, and fourth sides, the first side being opposite the second side, and the third side being opposite the fourth side,
• the battery cell has curved surfaces at the third and fourth sides,
• the battery cell includes an electrode assembly installed in a pouch, the electrode assembly being wound in a jelly roll having opposing curved surfaces, the pouch having opposing curved surfaces at the third and fourth sides of the battery cell corresponding to the opposing curved surfaces of the electrode assembly,
• the pouch includes bonding portions at a first side and the third and fourth sides of the battery cell, the bonding portions sealing the pouch, and
• the bonding portions at the third and fourth sides are folded along the curved surfaces of the electrode assembly, the bonding portions contacting respective support portions of the opening and being deformed to have a curve that corresponds to curved surfaces of the respective support portions.