BCC - Bottom Coil Clearomizer.
Place your mouse pointer over abbreviations for a definition.
If I got the right one, yours is a ego battery and a CE4 clearomizer. I really don't have much experience with that type of tank. Used one early on, within my first week vaping, not much good to say about them. If it continues to give you problems you might consider a Kanger t3 or similar tank. Note: CE4 ranks are not repairable. The T3 is a big improvement over the CE4.