I am actually curious to know who does what? Tesla and Panasonic and CATL are doing R&D on batteries. And Tesla and Panasonic are known long-term partners. So,

I am actually curious to know who does what? Tesla and Panasonic and CATL are doing R&D on batteries. And Tesla and Panasonic are known long-term partners. So, how do they share the R&D? Do they research different topics (chemistry, manufacturing, etc...), does Tesla pays Panasonic to do the R&D? Directly or indirectly? Tesla must have played a major role regarding battery technology. Other EV manufacturers too, but I suspect Tesla more than the others since they were the biggest player for quite a while (and still are by some metrics), have loads of money, and offer battery products other than cars.