I think you should use Qlik Sense Desktop to turn the csv files into a qvd file. You'll have to use the Data Load Editor to write a bit of script code to store a table to a qvd file. Here's the online help for the Store command: Store ‒ Qlik Sense
I'm not sure but you can convert all those 7 CSV files into individual QVDs and then load those each QVD into new QVW file and use that QVW file as Binary load in Qlik Sense. In this way you'll get all the tables I.E Data Model in Qlik Sense.