(Edit this message through the "fast facts" section)
Apple is apparently jumping into the battery production game.
https://www.linkedin.com/job/apple/battery-management-jobs/?sort=relevance&page_num=1&trk=jserp_pagination_1 http://www.macworld.co.uk/news/apple/will-apple-make-icar-project-titan-rumour-roundup-bmw-3425394/
https://www.linkedin.com/job/apple/battery-management-jobs/?sort=relevance&page_num=1&trk=jserp_pagination_1
http://www.macworld.co.uk/news/apple/will-apple-make-icar-project-titan-rumour-roundup-bmw-3425394/
Electrovaya's technology would be a good starting point.