Battery

1 . A battery in which a power generating element comprising a positive electrode, a negative electrode and a separator is accommodated in a battery case, wherein:

said battery case is composed of a flexible sheet, and

at least part of said power generating element is covered with a cover member in said battery case.

2 . The battery according to claim 1 , wherein:

said positive and negative electrodes comprise a non-coated portion, and

the part covered with said cover member is said non-coated portion.

3 . A battery in which a power generating element comprising a positive electrode, a negative electrode and a separator is accommodated in a battery case, wherein:

said battery case is composed of a flexible sheet, and

said power generating element is entirely covered with a cover member in said battery case.

4 . The battery according to any of claim 1 to 3 ,

wherein said cover member is cup-shaped.

5 . The battery according to claim 4 ,

wherein said cup-shaped cover members cover said power generating element with open sides thereof facing each other.

6 . The battery according to any of claim 1 to 3 , wherein:

said battery is hermetically sealed, and

a pressure inside said battery is lower than atmospheric pressure.

7 . The battery according to any of claim 1 to 3 ,

wherein said power generating element is formed by winding said positive and negative electrodes through said separator.

8 . The battery according to claim 4 , wherein:

said flexible sheet has an accommodating part for accommodating said power generating element, and

a shape of said accommodating part follows said cup-shaped cover member.

9 . The battery according to any of claim 1 to 3 ,

wherein said cover member is 0.1 mm or thicker and 5 mm or thinner.

10 . The battery according to any of claim 1 to 3 ,

wherein said cover member is a resin molded part.

11 . The battery according to any of claim 1 to 3 ,

wherein said flexible sheet is 0.05 mm or thicker and 1 mm or thinner.