This week Tesla took the padlock off its patent file for others to copy, and in Europe it’s meeting with automakers including BMW to discuss ways to proliferate electric vehicles.

On Wednesday Tesla and BMW met, but what specifically was discussed was not published.

“Both companies are strongly committed to the success of electromobility and discussed how to further strengthen the development of electromobility on an international level,” a BMW spokesman said today in a statement.

BMW is developing its i-Series, with its i3 city car with range extending option, its most likely mainstream contender at the moment.

Tesla of course is all in, with no internal combustion or range-extended models planned, so ways to create synergies with the buying public are a hot topic.

On Thursday, Tesla CEO Elon Musk said his company has been in talks with BMW and other automakers on the topic of promoting EVs and making better use of its German Supercharger charging stations.

Previously, in January, Daimler CEO Dieter Zetsche said was open to increasing collaboration with Tesla. It presently owns a 4.3-percent stake.