Recently, David Moss, Nissan's senior vice president of research and development in Europe, said that Nissan has successfully developed all-solid-state batteries and is aiming to start trial production in 2025 and produce a new electric car powered by solid-state batteries in 2028.

Because solid-state batteries have long-lasting range, fast payback, and long lifespan, they are likely to be an important and transformative technology for the next phase of electric vehicle competition.

The core cost of electric vehicles on the battery, from the future direction of electric vehicles, the bottleneck of battery technology is to limit the entire electric vehicle breakthrough in the core of the ring, the current battery range of short board, charging time is long, as well as the battery life attenuation, winter is afraid of the cold, summer is afraid of the heat and other limitations, who can be attacked in this ring of the industry's pain points, to achieve the user experience level of the surge, the possibility of bending the curve to overtake the car is there.

From the type point of view, there are two main types of power batteries on the market, one is lithium iron phosphate, the other is a ternary lithium battery. Ternary lithium batteries have higher energy density and longer range, but due to the shortcomings of poor safety, they have been gradually replaced by lithium iron phosphate, and most of the new energy fire accidents are related to ternary lithium batteries. The structure of these two batteries is almost the same, mainly by the positive electrode, diaphragm, negative electrode, and then filled with electrolyte manufacturing, they are collectively referred to as liquid batteries.

Solid-state batteries are different from today's commonly used lithium-ion batteries and lithium-ion polymer batteries in that it is a kind of battery using solid electrodes and solid electrolyte, the solid electrolyte has a density as well as a structure that allows more charged ions to be gathered at one end to conduct a larger current, thus enhancing the capacity of the battery. In addition, it uses a glass compound made of lithium and sodium as the conducting material, replacing the electrolyte of the previous lithium batteries and greatly improving the energy density of lithium batteries.

Simply put, compared with the current lithium batteries, the advantages of solid-state batteries are quite obvious: first of all, its charging speed can be increased by more than a few times, and it is not subject to temperature limitations; secondly, the energy density is doubled, and the range reaches more than 1,000km; what's more, due to the solid-state electrolyte has the characteristics of non-flammable, non-corrosive, non-volatile, and won't leak, the chemistry is more stable, and there is no need to worry about the safety issues after the puncture. Safety.

In a way, solid-state batteries are kind of a revolutionary breakthrough.

From what we have seen so far, Nissan's solid-state battery completely removes the liquid element from the battery and will greatly improve the efficiency of storage and power transmission. Not only does it save 50% over lithium batteries, it also doubles the energy density and triples the charging speed. Simply put, Nissan's solid-state technology is 'all-solid-state', removing all liquid parts, which is where it leads the way. But semi-solid state still has a liquid electrolyte, and the liquid boils, still making energy storage and transmission less efficient. The news that Japan's solid-state battery has been successfully developed and has reduced the cost of the battery, we must not take it lightly and underestimate Japan's R&D capabilities in the field of new energy vehicles. Because in the past, it seems that the solid-state battery research and development why the delay in advancing, a big reason is that the cost of solid-state batteries is very high, the cost of all-solid-state batteries is four times the cost of liquid batteries, which is the core of its problems. If the cost of solid-state batteries down, the popularization of solid-state batteries will be greatly reduced.

In fact, Japan has been planning for a bend in the road in terms of solid-state batteries for a long time. For example, Toyota 2010-2014 there was a wave of patent applications, the research direction focuses on sulfide system solid state electrolyte. Toyota, Panasonic, Kyoto University, Riken Research Institute of Japan and other 38 automotive, battery, materials companies and scientific research institutions jointly, plans to 2030 around the cost per kilowatt hour of solid-state battery packs down to lithium batteries 30%. Outside Japan, South Korea's Samsung SDI and SK battery companies are also jointly developing solid-state batteries. Germany's BMW, has built its own electric cell research and development center, and Solid Power cooperation, is expected to realize the solid-state battery breakthrough and mass production in 2026.

(Source: TMT)

[Zhongshun New Energy Marketing Department February 25, 2023 Responsibility: Xiao Zheng]

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