The company’s woes are symptomatic of a wider malaise among companies that make batteries for electric vehicles.
The new agreement builds on an earlier announcement in which the German automaker said it would invest up to $5 billion in Rivian, a maker of electric vehicles. The new venture brings them closer.
The European Union is trying to assemble the building blocks to produce electric cars, but subsidies are luring companies to the United States.
Chancellor Angela Merkel steered Europe through crises, and Germany has boomed during her tenure. But she has ducked changes needed to ensure the success lasts, analysts say.