BMS --- don't seem to see any PPTC or Fused outputs

[ridgerunner]

I have a 7S 20A BMS supposedly is supposed to have short ckt protection....shorted the load only to blow one of the FETs in half....Can someone tell me how short ckt protection is done on the BMS? Do they sense high side or low side? How come I don't see any PPTC on these as many say they are recoverable after you remove the load?
Thanks