the prob is she's looking to mate
so until shes had her eggs, the angel will stay in the seven gallon.
I hate to break it to you, but that is DEFINATLEY not the problem. The problem is, that Convicts are agressive fish. No matter what. I have never, ever had a Placid Convict, and I just sold over 40 1 inch long fry. All of them fought ect. Their parents fought, it's in thier genes. Even if you don't have another convict in the tank, they will still fight. If it is food, they want to be on top, with no other competition, or tank space ect. They will ALWAYS fight. It is NOT fair to the angel , being your selfeshness got the poor thing hurt in the begining, and from your other posts, you will probably put the angel back in.
Once the female lays the eggs, they will go bad, and she will eat them. She may lose some color. You might think "ohhh, she has finally cooled down", but nope, she hasnt. If you put the angel back in, you will end up in your same exact situation your in right now. This will keep happening until either:
A. You get rid of the convict, and put the angel back in a suitable tank size.
B. You sell the angel, and get a male convict
C. Sell the angel, and leave the female in her own tank.
Fish won't stop fighting because they have layed eggs, in cichlids( such as convicts), they become even more agressive.
I hope this advice, however harsh it seems, doesnt fall upon deaf ears.