In the rapid development of China's power lithium-ion battery industry, the global trend of electrification of cars is increasingly obvious, the global solid-state battery companies have sprung up, Japan, the United States, Germany and other national research institutions and many enterprises to speed up the all-solid-state lithium battery research and development investment, a number of world-renowned automotive companies announced in 2017, 2020 ~ 2025 all-solid-state lithium batteries will be mass production on board.
All-solid-state battery patent situation
The number of patents that have been disclosed in the field of solid-state batteries since 1990 has reached 1926, of which the number of patents in the field of all-solid-state batteries has reached 871, accounting for about 45%.
In terms of quantity, the number of patents in the field of solid-state batteries has increased from 26 in 2007 to 273 in 2017, an increase of more than 10 times, while the number of patents for all-solid-state batteries has increased from zero to nearly half, especially in the past three years, the number of patents for solid-state batteries has started to exceed 200 each year, indicating that the research and development of solid-state batteries, especially all-solid-state batteries, is receiving more and more attention from various parties.
Geographically, Japan currently owns 916 solid-state battery patents, accounting for nearly half of the patents, with a large lead. Next, the United States and China have 398 and 362 patents respectively, and their positions are close to each other. South Korea has 100 patents and ranks fourth. In terms of all-solid-state battery, Japan has 657 patents, accounting for 75%, with a more obvious lead. China and South Korea have 128 and 37 patents respectively; the United States is slightly weaker in the field of all-solid-state batteries, with only 29 patents. Among them, Japan and Korea are dominated by industry in terms of holding the main body of all-solid-state battery patents, while China is still dominated by research institutions and universities.
Progress of domestic and foreign all-solid-state battery industrialization
Japan
Toyota plans to realize the commercial application of all-solid-state battery in the first half of 2020s. The basic core technology is the technology to reduce the internal resistance of all-solid-state battery cells. With this basic technology, Toyota has increased the volumetric power density of all-solid-state batteries to about 2.5 kW/L. At the same time, it has succeeded in increasing the volumetric energy density to about 400 wh/L, which is about twice the level of lithium-ion batteries (LIBs) around 2010. Although this level of performance is not yet equivalent to the most advanced LIB batteries, according to Mr. Iwase, director of Toyota's Power Battery Production Technology Development Department, Toyota is now aiming to advance beyond LIB to commercial mass production. The company will first use the above-mentioned internal resistance reduction technology as a basis to achieve a certain number of all-solid-state batteries in the first half of 2020, and then will establish the goal of mass production technology.
Toyota's basic technology for commercial application of all-solid-state batteries and the corresponding effect
In addition, 23 automotive, battery and material companies such as Toyota, Honda, Nissan and Panasonic, as well as 15 academic institutions such as Kyoto University and RIKEN will participate in the research and plan to fully grasp the technology related to all-solid-state batteries by 2022.
South Korea
In order to significantly reduce the risk of power battery fire, Samsung SDI has proposed a "blueprint for the development of all-solid-state battery technology". The all-solid-state battery is a solid electrolyte that can completely separate the positive and negative electrodes, which has a very high safety level and will significantly reduce the possibility of battery fires. At the same time, all-solid-state batteries may have a driving range of more than 700 kilometers on a single charge. Samsung SDI General Manager Jeon Young-hyun said, "In order to take a leading position in the future electric vehicle market, we will lead the popularization of electric vehicles by developing differentiated products based on cutting-edge technologies and strive to have the dominant technology competition."
Germany
In November 2018, German Chancellor Angela Merkel will plan to allocate €1 billion to support a German battery manufacturer and also fund a battery R&D facility for the development of next-generation solid-state batteries. Among others, Volkswagen and BMW are also heavily developing solid-state batteries, with mass production likely to begin in 2024 or 2025.
United States
The United States is focusing on the R&D route of all-solid-state lithium batteries based on polymer and oxide solid electrolytes, and the United States Advanced Battery Consortium (USABC) proposes to increase the energy density of cells to 350 Wh/kg in 2020. some startup battery companies such as Sakit3, SEEO, QuantumScape and SolidPower have announced that they have made significant progress in the development of high energy density Some startups such as Sakit3, SEEO, QuantumScape and SolidPower have announced significant progress in the development of all-solid-state lithium batteries.
