This article is a little dated, but it shows the possible connection.  Since then I believe the arrangement has been formalized.

German battery cell production: Terra E is the name of a consortium that consists of ThyssenKrupp, M+W and Manz who reportedly want to team up with battery assembly firms like Litarion, BMZ and StreetScooter to establish large scale battery cell production in Germany. Varta may join the partners’ endeavour and BMW has been mentioned as first automotive customer. The first task for Terra E will be to find 150m euros before applying for further funding from the federal government.
tagesspiegel.de (in German)

http://www.electrive.com/2017/05/16/terra-e-podbike-visedo-teco-hyundai/