Solid state batteries are ahead of all solid state batteries

In recent years, the research and development focus of domestic and foreign companies and research institutions has shifted to solid lithium batteries. All-solid batteries have a huge advantage over current lithium-ion batteries in terms of cost, density and thermal stability. In the future, the use of ultra-safe, long-running electric vehicles will be a new hope for the electric car industry. However, at this stage, all-solid batteries are still not available, but the news that the country's first solid-state batteries have passed the National Safety check is encouraging. Recently, Jiawei's subsidiary, Jiaweilong, produced by solid state energy storage technology Rugao Co., Ltd., a type 36 Ah solid solid soft package three-phase material power lithium ion battery has passed the mandatory inspection of the National Motor Vehicle Quality Supervision and Inspection Center. This is the first case in China that solid state batteries have passed the National inspection and certification.

Affected by this news, the stock price of Jiawei shares on July 20(Friday) rose shortly after the opening and continued until the close. Judging from the performance of the securities market, the market recognizes its future performance in the industry.

Previously, the OFweek Lithium Grid had reported that Japanese companies and research institutes have invested more in solid state battery research and development than in the world. Toyota already plans to formally replace liquid batteries with solid batteries by 2020, triggering a revolution in the global car industry. As the current mainstream of the next generation of batteries, solid-state batteries in China's research and development and production, Domestic battery giants such as Ningde Times, BYD, Guoxuan Gaoke, Zhongtian Technology, and Lithium Lithium have all entered the research and development of solid-state lithium battery technology and technology exploration, but they are currently in the laboratory stage.

Why choose solid cell type instead of going directly into solid cell?

The reason is that in the design of the battery, dendritic growth often pierce the diaphragm, causing the battery to short-circuit. The solid lithium-like battery is made of pure lithium foil and is coated with polymer ceramic electrolytes, which can prevent dendritic growth and greatly improve the safety performance of the battery. At the same time, lithium-like batteries have a good ploidability and cycle life by increasing the invulnerability and stability of the interface, reducing the interface impedance and introducing a very small amount of Ionic liquids or gel electrolytes.

Compared with solid-state batteries, all-solid batteries still have great technical problems and high thresholds. On May 21st, the "OFweek 2018(2nd) China Power Lithium Battery Technology and Application Seminar" organized by the OFweek Lithium Grid, Dr Huqizhao, founder and CEO of Solid Energy, a US energy company, shared his vision of a lithium battery with an energy density of up to 500 watts/kg. During the round table discussion, he admitted that there are still material problems in all-solid batteries that need to be overcome. All-solid batteries still have a high technical threshold.

Solid state is an important transition stage for solid state batteries. The first domestic report on solid state batteries is an important milestone for China's solid state batteries. With the improvement of comprehensive technical indicators such as recycling and safety, the market for solid state batteries will gradually expand. Then there will be an outbreak in the market.

All solid batteries are too early, solid batteries first

According to the OFweek lithium grid, Shenzhenjiawei has long been deployed in the solid-state battery field, and its subsidiary Jiaweilong has accumulated rich experience in the development of solid-state batteries. In March this year, Jiaweilong was able to send samples of 36Ah solid lithium-ion batteries and battery modules to the National Motor Vehicle Quality Supervision and Inspection Center in Chongqing for electrical performance, life, environmental reliability, safety, and battery thermochemical coupling. All inspection items comply with the National "GB/T31484-2015 Electric Vehicle Power Battery Cycle Life Requirements and Test Methods", "GB/T31485-2015 Electric Vehicle Power Battery Safety Requirements and Test Methods" and "GB-T31486-2015 Electric The requirements of the Performance Requirements and Test Methods of the Power Battery for Automobile and the compulsory inspection report recognized by the National Motor Vehicle Quality Supervision and Inspection Center.

In fact, Jiaweilong has a total of three types of solid lithium-ion battery products that have passed the National Power Battery New National Standard strength test. In addition to the previously mentioned 36Ah high energy density ternary lithium-ion battery, there is also 20Ah fast charge lithium titanate battery. And 24Ah quick-charge lithium ion ternary battery.

According to the research and development personnel of Wei Weilong, Jiaweilong can currently obtain a strong 36Ah high-energy density three-way lithium ion cell with a core energy density of 220-250 Wh / kg and a battery energy density of 145-175 Wh / kg. The cycle life is more than 4,000 times. For passenger vehicles, logistics vehicles, household energy storage and other areas, according to Jia Wei shares, is currently preparing for cooperation with a number of new energy vehicle plants new energy models. According to the announcement issued by 6yue27rijiawei's shares, Jiaweilong and Wuxi Zhongying Industry and Trade Co., Ltd. signed the "Contract for the Purchase and Sale of Electric Vehicle Battery Systems." Wuxi Zhongying Industry and Trade will purchase two models of electric vehicle Jiaweilong from Wuxi Zhongying. Lithium battery system, the total number of 200,000, the contract amount is 43, 2 million yuan, the two sides agreed to complete the delivery of all products within one year.

The energy density of the 20Ah fast-charging lithium titanate battery core can reach 80Wh / kg, which can be fully charged within 6min and has a cycle life of more than 25,000 times. It is used for fixed line passenger cars, ore carriers, and dock unloading trucks. Large energy storage power stations, power grid FM and other fields.

In addition, 24Ah fast-charging three-way lithium-ion batteries have a core energy density of 150 Wh / kg, a battery energy density of 100 Wh / kg, and a cycle life of more than 8,000 times. For hybrid electric vehicles(HEV), shared bicycles, shared tricycles, shared logistics vehicles and other fields. The above three types of solid lithium-ion battery products have reached the industry's leading level in terms of safety, energy density, fast charge and fast discharge, and cycle life.

Solid state batteries are an important product strategic plan for Jiawei shares. Three solid state lithium batteries have successively received national motor vehicle inspection reports, or they will be expected to gain a greater share in the market competition with the continuous development of technology and the market.

The page contains the contents of the machine translation.