Rechargeable battery including fluorescent coating layer
A rechargeable battery including an electrode assembly including a first electrode and a second electrode; electrode terminals electrically coupled to the electrode assembly; a case in which the electrode assembly is placed; a cap plate in an opening of the case to seal the case, the cap plate including a vent hole; and a fluorescent coating between the cap plate and the opening of the case.
1. A rechargeable battery comprising:
an electrode assembly including a first electrode and a second electrode;
electrode terminals electrically coupled to the electrode assembly;
a case in which the electrode assembly is placed;
a cap plate in an opening of the case to seal the case, the cap plate including a vent hole; and
a fluorescent coating between the cap plate and the case,
wherein the fluorescent coating includes:
a first coating on a circumference of an inner wall surface of the opening of the case; and
a second coating on a lateral surface of the cap plate and facing the first coating.
2. The rechargeable battery as claimed in claim 1 , wherein the second coating is on a lower circumference of an edge of the cap plate and has a thickness of 40% or less a thickness of the edge of the cap plate.
3. The rechargeable battery as claimed in claim 1 , wherein the first coating is on an upper end of the inner wall surface of the case and has a same width as a thickness of the cap plate.
4. The rechargeable battery as claimed in claim 1 , wherein:
an edge of the cap plate includes a tapered surface, and
the second coating is on the tapered surface.
5. The rechargeable battery as claimed in claim 4 , wherein the fluorescent coating is on 40% or less of an entire width of the tapered surface.