Secondary battery, electronic device, and electric tool
AssigneeMurata Manufacturing Co., Ltd.
InventorYasuaki HARA
Life of this patent
Estimating the term…
Abstract
Provided is a secondary battery. The secondary battery includes a positive electrode includes a first covered part covered with a positive electrode active material layer and a positive electrode active material non-covered part on a positive electrode foil, and a negative electrode includes a second covered part covered with a negative electrode active material layer and a negative electrode active material non-covered part on a negative electrode foil, an electrode wound body includes: a flat surface formed by bending each of the positive electrode active material non-covered part and the negative electrode active material non-covered part toward the central axis of the electrode wound body to have an overlap with each other; and a groove formed in the flat surface.
Claims29
A secondary battery comprising:
- an electrode wound body including a first electrode, a second electrode, and a separator interposed therebetween, and having a first end and a second end;
- and
- a first electrode current collector plate connected to the first end;
- and
- a second electrode current collector plate connected to the second end, wherein
- the first electrode includes a first electrode foil, and a first electrode active material layer covering a part of the first electrode foil,
- the first electrode includes a first electrode covered part in which the first electrode foil is covered with the first electrode active material layer, and a first electrode exposed part exposed from the first electrode active material layer,
- the first electrode exposed part is bent and includes first electrode-foil adjacent portions adjacent to each other at a the first end, and
- the separator is spaced from the first electrode current collector plate.
The secondary battery comprising:
- an electrode wound body including a first electrode, a second electrode, and a separator interposed therebetween, and having a first end and a second end;
- a first electrode current collector plate is connected to the first end;
- and
- a second electrode current collector plate is connected to the second end,
- wherein
- the second electrode includes a second electrode foil, and a second electrode active material layer covering a part of the second electrode foil,
- the second electrode includes a second electrode covered part in which the second electrode foil is covered with the second electrode active material layer, and a second electrode exposed part exposed from the first electrode active material layer,
- the first electrode exposed part is bent and includes first electrode-foil adjacent portions adjacent to each other at the first end,
- a part of the separator is bent, and
- the separator is spaced from the second electrode current collector plate.
A secondary battery comprising:
- an electrode wound body including a first electrode, a second electrode, and a separator interposed therebetween, and having a first end and a second end;
- a first electrode current collector plate connected to the first end;
- and
- a second electrode current collector plate connected to the second end, wherein
- the first electrode includes a first electrode foil, and a first electrode active material layer covering a part of the first electrode foil,
- the first electrode includes a first electrode covered part in which the first electrode foil is covered with the first electrode active material layer, and a first electrode exposed part exposed from first electrode active material layer,
- the first electrode exposed part is bent and includes first electrode-foil adjacent portions adjacent to each other at the first end,
- the second electrode includes a second electrode foil, and a second electrode active material layer covering a part of the second electrode foil,
- the second electrode includes a second electrode covered part in which the second electrode foil is covered with the second electrode active material layer, and a second electrode exposed part exposed from the second electrode active material layer,
- the second electrode exposed part is bent and includes second electrode-foil adjacent portions adjacent to each other at the second end,
- a part of the separator is bent, and
- the separator is spaced from the first electrode current collector plate and the second electrode current collector plate.
Dependencies are inferred from the claim text.