Lithium ion batteries for electric vehicles: what challenges?

This data-file tabulates the greatest challenges for lithium ion batteries in electric vehicles, which have been cited in 2020’s patent literature. Specifically, the work contains a sample of 100 patents aiming to overcome these challenges, as filed by companies including Tesla, CATL, GM, GS Yuasa, LG, Nissan, Panasonic, Sanyo, Sumitomo, Toyota, et al.

Our notes and conclusions are spelled out in detail. We find the industry is clearly entering execution mode, and less focused on radical breakthroughs in energy density. CATL and Tesla’s pursuit of a “million mile battery” is substantiated, but includes trade-offs. The patent disclosures also suggest great difficulties in ever achieving a battery-powered semi-truck.