From Tec1Do:Free BitLocker Manager is a strong and yet simple software for managing Microsoft BitLocker drive encryption and is at your service for free. By the capabilities this software provides for you, you can lock/unlock drives protected by BitLocker.
By this software, you can simply manage device when workstation goes locked and/or OS goes to hibernate or sleep mode. Another possibility this software has is the possibility to define a hotkey for showing software and another hotkey for locking all drives.