SEOUL- South Korea's LG Energy Solution Ltd. said Friday that its joint venture with Honda Motor Co. has begun mass production of lithium-ion battery cells for energy storage systems (ESS) in the United States.The battery plant in Jeffersonville, Ohio, operated by the joint venture L-H Battery Co., began producing ESS battery cells on Thursday (U.S. local time), the company said.The battery cells will be supplied through LG Energy Solution Vertech, the company's North American ESS system integration subsidiary, for use in power grid, commercial, industrial and residential ESS applications a…READ FULL ARTICLE