luckylindy

Oh...two thoughts: that recommendation above is for a 2.5" drive. Duh. You have a stick. Try Other World Computing. They have enclosures for those.  

Second: I have a 2015 15" MBP, too. For a number of months, the battery indicator had a warning icon and it said it needed to be serviced. I did some research and, apparently, there was an issue with batteries for some 2015 MBPs and an official replacement program. In December of 2021, I called support at Apple and they verified the issue and program. So they had me send the machine in and they replaced the battery at no cost. Of course, being Apple, to replace the battery means replacing the whole top case (keyboard, trackpad, etc.)

So, you could see if the program applies to your machine? Call them or chat with them; tell them that the battery is bulging in your machine and your system got hot and stopped working. That you're afraid it might explode. That you looked up the issue and saw there were defective batteries on these machines, and that Apple had put a program in place to replace these batteries. (They hate it when customers may face a personal injury due to their products, so they tend to bend over a bit.) Don't tell them you went to a third party to open it up and look at it. That will just complicate things. If the replacement battery fixes it, great. If not, maybe they will fix the fans, too. Worst case is they tell you it is not covered, and they send it back. 

BTW, if you do send it back, if you upgraded any component (like I did, putting in a 1TB SSD), you need to put the machine back to how you got it. Otherwise, they won't even look at it.

Good luck!