Battery and electronic device comprising same
A battery includes: a positive electrode including a positive electrode substrate having a first surface and a second surface, a positive active material applied to the first surface of the positive electrode substrate, and a positive electrode tab attached to the first surface of the positive electrode substrate; a negative electrode including a negative electrode substrate having a first surface and a second surface, a negative active material applied to the first surface of the negative electrode substrate, and a negative electrode tab attached to the first surface of the negative electrode substrate; and a separator provided between the positive electrode and the negative electrode, wherein the first surface of the negative electrode substrate includes a first region to which the negative active material is not applied and which faces the positive electrode tab, the first surface of the negative electrode substrate includes a second region to which the negative active material is applied and which is adjacent to the first region in a longitudinal direction of the positive electrode tab, and the negative electrode includes an insulating layer disposed in at least a portion of the first region.
1 . A battery comprising:
a positive electrode comprising a positive electrode substrate having a first surface and a second surface, a positive active material applied to the first surface of the positive electrode substrate, and a positive electrode tab attached to the first surface of the positive electrode substrate;
a negative electrode comprising a negative electrode substrate having a first surface and a second surface, a negative active material applied to the first surface of the negative electrode substrate, and a negative electrode tab attached to the first surface of the negative electrode substrate; and
a separator provided between the positive electrode and the negative electrode,
wherein the first surface of the negative electrode substrate comprises a first region to which the negative active material is not applied and which faces the positive electrode tab,
wherein the first surface of the negative electrode substrate comprises a second region to which the negative active material is applied and which is adjacent to the first region in a longitudinal direction of the positive electrode tab, and
wherein the negative electrode comprises an insulating layer disposed in at least a portion of the first region.
2 . The battery of claim 1 , wherein the insulating layer comprises a first insulating layer disposed from the first region up to a peripheral region of the second region within a predetermined range from the first region.
3 . The battery of claim 1 , wherein the insulating layer comprises a second insulating layer disposed in the first region.
4 . The battery of claim 1 , wherein an end of the positive electrode substrate and an end of the negative electrode substrate do not overlap.
5 . The battery of claim 1 , further comprising:
a plurality of turn regions comprising a first turn region and a second turn region,
wherein the positive electrode substrate, the separator, and the negative electrode substrate are wound in a jelly-roll type configuration.
6 . The battery of claim 5 , wherein the first region to which the negative active material is not applied is disposed in a turn region, from among the plurality of turn regions, that is adjacent to a different turn region from among the plurality of turn regions, and
wherein the positive electrode tab is disposed in the different turn region.
7 . The battery of claim 6 , wherein on the second surface of the negative electrode substrate, the negative active material is not applied to a region corresponding to the first region.
8 . An electronic device comprising:
the battery of claim 1 ;
a memory; and
a processor,
wherein the battery is configured to supply power to the memory and the processor.