NINGDE, China (Reuters) – Robin Zeng, the billionaire founder of CATL, aims to reinvent the world’s largest battery maker as a green-energy provider and to slash the cost of developing electric vehicles, upending the economics of the industry that has powered its growth. Zeng told Reuters in an interview that he expects the business of developing and managing “zero carbon” electric grids could be “ten times” larger than supplying electric-vehicle