A few days ago, Honda spokesperson Teruhiko Tatebe said that Honda is considering developing all-solid-state battery technology for electric vehicles and has not developed the project with other manufacturers. It is worth noting that with the continuous expansion of the new energy market and the continuous promotion of national policies, more and more car companies are turning their attention to the research and development and production of new energy vehicles. At the same time, more car companies have set their sights on the iterative update of batteries, thus introducing more extreme products.
The Honda Urban EV concept car unveiled at the 2017 Frankfurt Motor Show
2017 Tokyo Motor Show debut Honda Sports EV Concept Car
In fact, researchers around the world are on the road to commercializing solid-state batteries. The all-solid lithium battery has extremely high safety. Its solid electrolyte is non-flammable, non-corrosive, non-volatile, and liquid-free. It also overcomes the phenomenon of lithium dendrite. The auto-ignition probability of a car equipped with an all-solid lithium battery is greatly reduced. The current energy density of all-solid-state lithium batteries is about 400Wh/Kg, and the estimated maximum potential value is 900Wh/Kg. However, solid electrolytes have high electrical resistance. There are still some problems to be solved in terms of battery energy density. It is necessary to start with solid electrolytes and positive and negative materials. Once these problems can be effectively solved, a new battery will be set up in the future. revolution.
In addition, according to previous reports, Toyota has planned to replace lithium batteries with solid-state batteries by 2020. Its solid-state battery energy density is three to four times that of lithium batteries, according to Toyota Shigeki Suzuki, who is responsible for materials engineering. Said that Toyota will fully realize the commercialization of all solid-state batteries by 2020. In the future, more and more car companies will devote themselves to the research and development and investment of new energy vehicles and peripheral supporting products, which will better improve the products, so that pure electric new energy vehicles can achieve the idea of “replacement” of traditional fuel vehicles.
◆ Introduction to Fanwai:
It is understood that the characteristics of solid-state batteries are very obvious compared to liquid batteries: their safety is high. The most prominent advantage of an all-solid-state battery compared to a conventional lithium battery is safety. The liquid electrolyte is flammable and explosive, and the growth of lithium dendrites during the charging process is likely to pierce the diaphragm, causing a short circuit of the battery, posing a safety hazard. The solid electrolyte is non-flammable, non-corrosive, non-volatile, and has no leakage problems, and also overcomes the phenomenon of lithium dendrite, so the all-solid battery has extremely high safety.
High energy density. The solid-state battery electrolyte can block the growth of lithium dendrites, and the range of material application systems is greatly improved, laying a foundation for the new lithium battery technology with higher energy density space. At present, the development of solid-state batteries can provide energy densities of up to 300-400 Wh/kg.
The loop performance is strong. The solid electrolyte solves the problem of the solid electrolyte interface film formed during the charging and discharging of the liquid electrolyte and the lithium dendrite phenomenon (lithium dendrites refer to the lithium dendrites formed by lithium ion reduction during charging of the lithium battery using the liquid electrolyte). Single quality.), greatly improve the cycle and service life of the lithium battery, ideally, the cycle performance is excellent, can reach about 45,000 times.
The scope of application is expanding. The solid-state electrolyte gives the solid-state lithium battery a compact structure, adjustable scale, and large design flexibility, which can be applied to drive microelectronic devices, and can also be used in the fields of power and energy storage. In addition, solid-state batteries also have a wider temperature operating range, and currently guarantee a temperature range of -25 ° C – 60 ° C.