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fast technology reported on september 2 that at the 2024 world power battery conference held recently, zeng yuqun, chairman of catl, talked about the latest developments in solid-state batteries in his keynote speech.

zeng yuqun said,catl has invested 7 to 8 years in research on all-solid-state batteries. the key to developing all-solid-state batteries lies in the research of materials and chemical systems, among which the most difficult problem is the "solid-solid interface" problem. ps. that is, the ion transmission between particles.

he gave an example, saying that if we use numbers 1 to 9 to represent the technology and manufacturing maturity of solid-state batteries, 1 means that the field has just begun to be involved, and 9 means that the technology is mature and can be put into large-scale production.

the current highest level in the industry is only around 4, and only some device samples have been made and some experimental verifications have been carried out. the use of these devices has many boundary conditions, such as achieving high low-temperature performance under 6000 atmospheres of pressure. this means that these devices cannot be put into market application.

“our current research progress is also around 4%, but compared with the situation around the world, our research should be considered "a big step ahead", or in english, "second to none".zeng yuqun said.

in addition, he also talked about battery safety. at present, new energy vehicle safety accidents occur frequently. in june this year, cctv's special report mentioned,the fire rate of new energy vehicles will be about 0.96 per 10,000 in 2023. if the safety problem is not solved, the consequences will be catastrophic.

many products claim that their safety failure rate reaches the ppm level, which is one in a million, but in fact, the safety failure rate is only one in a thousand. at present, the number of battery cells installed in the 25 million new energy vehicles in the country has reached billions. multiplying this absolute value by the failure rate, the safety risk can be imagined.

current,catl regards safety as the lifeline of the company and has successfully reduced the single-cell safety failure rate of battery cells to one part per billion, or ppb level, increasing the safety factor by several orders of magnitude.

zeng yuqun hopes that the industry will put competition aside and put the vital interests of consumers, especially everyone's safety, first; jointly improve safety standards and establish an absolute red line for safety standards.