"The world's largest automotive supplier has decided against producing its own battery cells despite calls from EU politicians to do exactly that. Bosch said the investment would probably never pay off."
https://www.dw.com/en/bosch-says-battery-cells-are-too-expen...
The importance of BEV for China goes well beyond long-term concerns for climate change. For China the most important are the immediate geopolitical aspects of BEV. Every Chinese BEV in China is driving using domestic electricity and is not dependent on imported oil.
https://en.wikipedia.org/wiki/Malacca_dilemma
"The Malacca dilemma is a strategic vulnerability for the People's Republic of China due to its heavy reliance on the strait of Malacca, a critical maritime choke point connecting the Indian Ocean and the South China Sea."
"The United States is viewed within Chinese strategic analysis as a potential threat to maritime energy flows through the Strait of Malacca. In the event of a conflict, particularly over Taiwan, the United States could interdict oil shipments to China by disrupting maritime routes. China has expressed concern that U.S. naval forces operating near the Strait of Malacca could obstruct critical petroleum shipments, effectively cutting off vital imports. U.S. maritime strategy has included options for restricting China's access to key sea lanes through the use of attack submarines and surface ships."