Solid State Battery Technology Route -Lithium - Ion Battery Equipment

Solid State Battery Technology Route -Lithium - Ion Battery Equipment

The pursuit of zero-carbon emission vehicles in advanced countries around the world is becoming more and more popular, and the demand for new energy vehicle specifications has become increasingly clear. However, the current sluggish development of lithium battery technology restricts the cruising range and safety, making the upgrade of new energy vehicles slow. Recently The shocking battery fire accident of new energy vehicles has occurred again and again, forcing BMW, Toyota and other international car manufacturers to go out, no matter investment, joint venture or joint development, just to be one step ahead with the next piece of battery technology "solid-state battery". strategic bundling.

However, the industry leaders have been investing in solid-state batteries for about 20 years, but they are still in a state of chaos. production, and some continue to postpone the research and development roadmap, and it is even more common to hear that they leave the field after spending hundreds of millions of dollars. In terms of performance and mass production, there are inherent advantages and disadvantages that are irreversible at the level of modern technology. We divide electrolytes into six categories according to the process and chemical system: oxides, sulfides, cyanides, halides, films, polymers, to list Four technical routes illustrate its development status:(Lithium - Ion Battery Equipment)

solid polymer

Thanks to the maturity of the development of liquid polymers, the mass production capacity of solid-state polymer batteries is not far from that of liquid polymers, but there are poor stability leading to poor electrical reliability, coupled with ionic conductivity at room temperature. Poor, the battery performance is greatly reduced, and even a situation where it is difficult to operate below 10-4S/cm.

Earlier, the French Bolloré Group used BatScap batteries for urban online car-hailing, but must continuously heat the electric vehicle battery to above 60°C to maintain the internal conductivity of the battery. The German component giant Bosch Bosch Group also had to announce its abandonment of its investment in Seeo in early 2018; the most notable recently is the solid polymer electrolyte manufacturer IonicMaterials, which has received investment from Samsung SDI, Dyson, Wanxiang and other groups, perhaps Samples have come out in recent years.

oxide film

The thickness of thin-film batteries can reach the micron level, and was once regarded as the best solution for the medical and wearable markets. However, it is similar to the semiconductor sputtering production process, the equipment cost is not cheap, the environmental requirements are extremely high, and the yield is low, so mass production is not easy. And the cost is very high.

IPS in the United States made all-solid-state thin-film batteries in 2008, and was acquired by Apple in 2014, but no products have been released so far; in addition, Dyson Dyson Group’s investment in Sakti3 is the most prosperous news in the solid-state battery market in 2015, but in 2017 Announced giving up all Sakti3 patents and turned to investing in solid polymer plants for quick market entry. From this point of view, the mass production and commercialization of thin-film batteries remains to be seen.


Although the electrical conductivity is good, the stability is the biggest shortcoming. The stability that affects the oxidation and reduction is also low. The process technology is complex, and it is far from the lithium battery process. Therefore, the sulfide system has extremely high resources.

Toyota, SamsungSDI and CATL have all invested in the development of this system. Toyota expects that the sulfide solid-state battery developed by it will be commercially available in 2022; South Korean battery manufacturer SDI has spent more than ten years of research on the sulfide technology route, and turned to the beginning of this year. Whether the solid polymer route or the sulfide route will work, only time will tell.


Oxides have the highest stability and can be produced in a general atmospheric environment with relatively inexpensive process equipment and factory facilities.

Sony, Ohara and Proineng Technology are the representatives of this technical route. Among them, Proineng Technology takes the lead in overcoming the poor electrical conductivity of oxides, which is easy to be brittle after being stacked during production, and will crack when bent. and other problems, successfully commercialized solid-state batteries with "12-minute fast charging" and "dynamically bendable", and applied them to HTC, SoftBank and other brand products, and has now cooperated with several car manufacturers in China, Europe, and Japan to deploy solid-state power. battery market.



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