North Carolina-based Cirba Solutions has raised a $50M funding round to provide battery management solutions for end-of-life batteries.  The company extracts key materials from end-of-life batteries and then reuses them for other products in the supply chain. Cirba Solutions aims to use the funding to open a new manufacturing plant in Arizona in addition to the company's six existing plants. The company has raised over $300M since its inception. Marubeni led this funding round. Cirba is based in Charlotte, North Carolina.