Jan 14, 2015 - 09:08 am EV battery patents. BatteriesHitachiLG ChemPatentsSamsung SDI As it holds 757 EV battery patents, LG Chem is the most innovative battery manufacturer, according to SNE Research. Samsung SDI takes second place with 528 patents followed by Hitachi (349). sneresearch.com – ADVERTISEMENT – Previous article Samsung SDI, Local Motors, University of Waterloo, Siemens. Next article Hyundai, Audi R8 e-tron, Audi Q7, Seoul, Infiniti, Bentley.