Move Document Library PowerShell

I am facing problems while trying to move a Document Library from one Subsite to another on a SharePoint 2013 on premise installation.

I want to "move" a document library with powershell from one subsite to another and I also want to keep the Version history of all files.

I found the following script: http://ift.tt/16jQPCc

But the skript only copies the files and so they get a new version history. Is there a way to copy the history of each file too?

best regards Alex