How does the electric parking brake work?

Hello guys, excited Due to the handbrake problem of the V70II drivers (and S60, S80, XC90) I would have liked to know how exactly the parking brake works with the newer Volvos. Sure, electric with engine – but how exactly ?? Does anyone have drawings etc?? Is it also designed as a drum brake via separate brake cheeks? Or are the pads of the normal service brake used with ? Has anyone ever used the electric HB during the (slow) ride ?? Since Volvo switched to VIDA, everything is Scheixxe Greetings, Eric