All-solid-state batteries use solid electrodes and solid electrolytes to replace the electrolyte of previous lithium batteries, which greatly improves the energy density of the battery.
As an upgraded version of lithium batteries, all-solid-state batteries are superior to liquid lithium batteries in terms of energy density, charging rate, safety, cycle life and cell thermal management, and are considered by the industry as the next-generation advanced battery technology.
1. SVOLT launches all solid state prototype cells
Recently, the SVOLT all-solid-state battery laboratory has developed China’s first batch of 20Ah-class chalcogenide all-solid-state prototype batteries. The energy density of this series of cells reaches 350-400Wh/kg, and has successfully passed experiments such as acupuncture and 200°C hot box. Once mass-produced and applied, electric vehicles can achieve a cruising range of more than 1,000 kilometers.
According to reports, the SVOLT all-solid state laboratory adopts the more difficult sulfide technology route, and develops the layout in terms of sulfide electrolyte and its thin film preparation technology, sulfide all-solid-state battery preparation capability, etc., and currently has the kilogram-level solid electrolyte material.
Independent research and development capabilities such as independent synthesis, continuous preparation of solid-state electrolyte membranes, all-solid-state pouch cell assembly, and new equipment development, etc., have gained experience and expanded patent layout in a targeted manner, and have applied for 109 patents, including 93 item invention patents.
2. What is a solid state battery?
Advantages of safety, high energy density, and strong cycle performance, solid-state batteries are called the future development direction of lithium batteries. According to estimates, by 2030, the market size of solid-state batteries is expected to exceed 6 billion US dollars.
According to the different electrolytes, solid-state batteries are divided into three technical routes: polymer, sulfide and oxide. The three routes have their own advantages and disadvantages: Although the polymer of polymer solid-state batteries has good high-temperature electrical conductivity, it does not perform well at room temperature.
The conductivity is not high; the sulfide solid-state battery has the best overall performance among the three batteries. However, the sulfide electrolyte easily reacts with water, oxygen, etc. in the air to generate toxic gases, which increases the difficulty of manufacturing. Oxide solid-state batteries have the best overall performance. Although the oxide electrolyte is less stable, its cost is low.
3. The layout of solid-state batteries by different countries and companies
Experts generally believe that it will take 5-10 years for all-solid-state batteries to be mass-produced. According to experts’ speculation, 2025 is a critical period for the transition from liquid batteries to solid-state batteries, and different countries have different layouts for solid-state batteries.
1. The layout of the rest of the world
In addition, Chinese and foreign companies have different choices for solid-state battery routes: Japanese and Korean companies mostly use the sulfide solid-state electrolyte technology route, Chinese companies mainly use the oxide route, and European and American companies are more balanced in the choice of the three routes.
For example, Solid Power invested by BMW and Ford mainly develops all-solid-state batteries based on sulfides, while QuantumScape solid-state batteries invested by Volkswagen take the oxide route.Optimistic about the potential of solid-state batteries, Chinese and foreign companies have deployed them one after another. Among them, Japanese and Korean companies have more advantages.
Nikkei Shimbun cooperated with patent research company Patent Result to investigate the number of all-solid-state battery-related patents filed by 10 countries and regions including Japan, the United States, Europe, and 2 institutions including the World Intellectual Property Organization (WIPO). The results show that the top 5 Among the companies, 4 are Japanese companies.
And in terms of time planning, the goals of foreign companies are more clear: Toyota plans to achieve small-scale mass production of all-solid-state batteries by 2025, and firstly install them on hybrid models mass production; Hyundai plans to trial-produce electric vehicles equipped with solid-state batteries in 2025, and achieve full-scale mass production around 2030; BMW plans to launch a prototype vehicle equipped with solid-state batteries by 2025 and achieve mass production by 2030; LG’s new Energy expects to achieve mass production of all-solid-state batteries in 2026.
2. China’s layout
Chinese companies are not far behind and are catching up: the 360Wh/kg ternary semi-solid battery developed by Gotion Hi-Tech will be mass-produced this year, and the 400Wh/kg ternary semi-solid battery is currently in the company’s laboratory. There are prototype samples; Ganfeng Lithium Industry stated that its first-generation solid-state battery is a semi-solid-state battery, and the planned 2GWh first-generation solid-state battery production capacity is expected to be gradually released this year;
CALB has also been doing research and development of solid-state batteries. First is lean liquefaction, then semi-solid, and finally solid. 400Wh/kg for lean liquefaction, 450Wh/kg for semi-solid state, and 500Wh/kg for quasi-solid state; Joint Laboratory” was inaugurated. According to the plan, the long-range solid-state power battery of more than 1,000 kilometers jointly developed by the two parties will be the first to be applied on new models of SAIC’s own brand next year.
4. SVOLT strengthens the research and development of solid-state batteries
SVOLT’s business includes the research and development, manufacturing and innovation of next-generation battery materials, cells, modules, PACK, BMS, energy storage and solar technologies. According to the data, in June this year, SVOLT ranked seventh among Chinese enterprises in the month with a power battery loading capacity of 0.57GWh, accounting for 2.11%.
In recent years, SVOLT has increased its research and development efforts in the field of solid-state batteries: In April 2021, SVOLT Wuxi Lithium Battery Innovation Center and Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences jointly established a solid-state battery technology research center, dedicated to promoting solid-state batteries Technology transformation has landed.
SVOLT said that it has applied for a total of 3,800+ patents, including 1,200+ invention applications and 2,200+ valid patents. In terms of the layout of solid-state batteries, there are more than 200 global patent applications for SVOLT-state batteries and jelly batteries. The solid-state electrolyte is non-flammable, non-corrosive, non-volatile, and non-leakage. The jelly battery doesn’t catch fire and has self-healing, which also successfully passed the acupuncture experiment.
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