Wu Kai, chief scientist of CATL, said at the CIBF2024 Advanced Battery Frontier Technology Seminar that if technology and manufacturing maturity are used as an evaluation system (on a scale of 1-9), CATL’s all-solid-state battery research and development is currently at a level of 4. Wu Kai said that CATL’s goal is to reach the 7-8 level by 2027, which means that all-solid-state batteries can be produced in small batches and the opportunities are great, but mass production will still face problems such as cost.