Power storage device, battery management unit, and electronic device
A repeatedly bendable power storage device is provided. A highly reliable power storage device is provided. A long-life power storage device is provided. A repeatedly bendable electronic device is provided. A flexible electronic device is provided. The power storage device includes a positive electrode, a negative electrode, and an exterior body wrapping the positive electrode and the negative electrode. The exterior body includes a metal layer and a resin layer. The thickness of the metal layer in at least part of an outer edge of the exterior body is smaller than that in a region other than the outer edge. The exterior body has a plurality of slits in the outer edge.
1. A power storage device comprising:
a positive electrode;
a negative electrode; and
an exterior body wrapping the positive electrode and the negative electrode,
wherein the exterior body includes an outer edge comprising a first slit and a second slit,
wherein an angle between a major axis of the first slit and a major axis of the outer edge is represented as a°,
wherein an angle between a major axis of the second slit and the major axis of the outer edge is represented as b°, and
wherein a is larger than b.
2. The power storage device according to claim 1 ,
wherein the exterior body includes a first film-form region and a second film-form region, and
wherein the first film-form region is in contact with the second film-form region in the outer edge.
3. The power storage device according to claim 1 , wherein the exterior body comprises a resin layer.
4. The power storage device according to claim 1 , wherein the exterior body comprises a metal layer.
5. The power storage device according to claim 1 , wherein the exterior body is sealed in the outer edge.
6. The power storage device according to claim 1 , wherein the power storage device is configured to be repeatedly bent.
7. A battery management unit comprising:
the power storage device according to claim 1 ; and
a transistor.
8. The battery management unit according to claim 7 , wherein the transistor comprises an oxide semiconductor.
9. An electronic device comprising the power storage device according to claim 1 .
10. A power storage device comprising:
a positive electrode;
a negative electrode; and
an exterior body wrapping the positive electrode and the negative electrode,
wherein the exterior body includes an outer edge,
wherein the outer edge has a band-like shape,
wherein the outer edge comprises:
a first slit comprising a first edge on an edge side of the exterior body; and
a second slit comprising a second edge on the edge side of the exterior body,
wherein the second edge is closer to a center of the power storage device than the first edge,
wherein an angle between a major axis of the first slit and a major axis of the outer edge is represented as a°,
wherein an angle between a major axis of the second slit and the major axis of the outer edge is represented as b°, and
wherein a is larger than b.
11. The power storage device according to claim 10 ,
wherein the exterior body includes a first film-form region and a second film-form region,
wherein each of the first film-form region and the second film-form region comprises a resin layer, and
wherein the first film-form region is in contact with the second film-form region in the outer edge.
12. The power storage device according to claim 10 , wherein the exterior body further comprises a metal layer.
13. A battery management unit comprising:
the power storage device according to claim 10 ; and
a transistor.
14. An electronic device comprising the power storage device according to claim 10 .
15. A power storage device comprising:
a positive electrode;
a negative electrode; and
an exterior body wrapping the positive electrode and the negative electrode,
wherein the exterior body includes an outer edge,
wherein the outer edge comprises a first plurality of holes arranged linearly, and
wherein the exterior body comprises a resin layer,
wherein the outer edge comprises a second plurality of holes arranged linearly, and
wherein a linear line on which the first plurality of holes are arranged is different from a linear line on which the second plurality of holes are arranged.
16. The power storage device according to claim 15 ,
wherein the exterior body includes a first film-form region and a second film-form region, and
wherein the first film-form region is in contact with the second film-form region in the outer edge.
17. The power storage device according to claim 15 , wherein the exterior body comprises a metal layer.
18. The power storage device according to claim 15 ,
wherein a major diameter of each of the first plurality of holes is greater than or equal to 0.1 mm and less than or equal to 3 mm.
19. A battery management unit comprising:
the power storage device according to claim 15 ; and
a transistor.
20. An electronic device comprising the power storage device according to claim 15 .