An ideal power battery should look like this: a battery that can withstand high current for ultra-fast charging, solves the problem that the charging time of electric vehicles is much longer than that of traditional refueling, and can still maintain the good characteristics of the battery at low temperatures, and the energy density is large enough , High safety, and the cost is similar to or lower than the current battery cost... Maybe there are already batteries on the market that have left their peers in some way. However, the question that terminal car manufacturers or consumers are more concerned about is whether there is a master of fast charging, high energy, high safety, good low temperature characteristics, and long cycle life?

　　I don’t know if there were any before, but after this CIBF2018 exhibition, someone may have given the answer.

　　At this CIBF2018 exhibition, as the only lithium-ion power company in Hunan Province that has passed the regulations of the Ministry of Industry and Information Technology for the automotive power battery industry, and the leader of the ten key industries in Hunan Province-Miaosheng Power Technology Co., Ltd. (hereinafter referred to as "Miaosheng Power ”), bringing its heavyweight new products to CIBF2018. At the exhibition, Miaosheng Power released the super fast charging power battery independently developed by the company, which provides a breakthrough solution for the current energy supply of new energy vehicles. In addition, Miaosheng Power also conducted a demonstration on the car.

　　So, what kind of power battery is this?

　　Ultra-fast charging technology will set off a revolution in the industry

　　It is understood that Miaosheng Power currently mainly develops high-energy density, high-power batteries, fast charging, ultra-low temperature and other battery products. It has advantages in appearance and structure design, BMS research and development, automated flexible production, quality management, and safety protection.

　　As the "heart" of electric vehicles, the performance of power batteries restricts the development of electric vehicles. Battery life is short, charging is slow, and there are certain safety hazards, which are the major "death points" of current power batteries.

　　The new technology brought by Miaosheng Power this time is based on solving these consumer pain points. On the morning of the 22nd, at the three-minute China super fast charging power battery system and the world premiere press conference for electric vehicles, Miaosheng Power released the results of their painstaking research for many years-the world's first mass-produced power for 3 minutes fast charging The battery and the first mass-produced 3-minute fast-charging electric car will be turned on simultaneously for three minutes. China’s super-fast-charging electric car test charge and test drive activities. This new technology is expected to solve problems such as fast charging of electric vehicles and set off a new round of revolution in the new energy vehicle industry.

　　According to Mr. Qiu Zeyou, Chairman of Miaosheng Power, the world's first mass-produced 3-minute super fast charging battery released this time can be continuously charged at a rate of 15C or higher, charging at a speed of more than 80% in 3 minutes, and charging and discharging cycles of 10,000 at 1C. It can start normally and charge quickly even in extremely cold and low temperature (-20℃) environment. In addition, a new energy vehicle power battery testing agency has been entrusted to carry out a full range of charging efficiency testing, and a third-party authoritative notary agency has been invited to supervise the entire process, and the testing agency’s test report has been presented on the spot.

　　A series of power battery products were released at this conference, according to the charging type: 20C type, 15C type, 10C type, 5C type. Among them, 5C energy fast charge battery is its main product. The energy density ranges from 190wh/kg to 210wh/kg, with 5C fast charging capability; it is used in various fields such as passenger cars, logistics vehicles, automobile buses, and electric energy storage.

　　Miaosheng Power: build a "bucket" power battery

　　Nowadays, what people often call "bucket machine" is used to describe those mobile phones with balanced configuration, no shortcomings, and powerful comprehensive experience. Extended to the field of power batteries, the "bucket" type power battery refers to a product with good charge and discharge characteristics, long cycle life, high energy density, good low temperature characteristics, high safety and fast charging.

　　According to Qiu Ze, the battery products of Miaosheng Power are close to linear discharge characteristics, and the remaining power can be calculated without any difference. The remaining mileage can be accurate to kilometers, effectively eliminating the unpredictability and uncertainty of cruising range, and solving mileage anxiety.

　　In terms of cycle life, he said that the battery has been tested and the remaining capacity is still more than 80% after 8,000 cycles. As can be seen from the graph below, from the overall curve of 0 to 7,500 cycles, the remaining capacity is a very gentle decline curve; after reaching 7,500 cycles, the remaining capacity fluctuates around 80%.

　　In terms of safety, the battery can work normally even in extremely cold and low temperature areas (below -20°C). In addition, he emphasized that the unit charge capacity of this series of super fast charge batteries is one-tenth of the heat produced by ordinary batteries, which meets the national "GBT31485-2015 Safety Requirements and Test Methods for Electric Vehicle Power Batteries" standard. The test results of a number of national safety requirements show that the battery can achieve no fire, no explosion, and no leakage under the test conditions.

　　In terms of battery cell consistency and BMS management, Qiu has analyzed, “The dynamic voltage difference of the battery can be controlled within 10mV, the product consistency is high, the battery charging and discharging curve is a sloping straight line, and the remaining voltage can be displayed by the corresponding voltage. Electricity, the unique straight line can greatly reduce the difficulty of BMS system management. "The remaining power measurement is not accurate, and it has always been a very bad experience for car owners in the process of using electric vehicles. If the accuracy of the calculation can be improved, it can effectively eliminate car owners' anxiety about the effective mileage of electric vehicles.

　　In addition, according to technical experts from Miaosheng Power, the energy density of the company's next-generation fast-charge battery products will be increased to more than 180wh/kg. In view of the current situation that the power of the existing domestic charging piles has not yet reached the technical requirements of super fast charging, while developing the 3-minute super fast charging, they also designed and developed 5-minute and 10-minute fast charging batteries, and began mass production. According to Qiu Zeyou, many well-known domestic automakers have thrown olive branches. It is worth mentioning that super fast charging is also a technology that maximizes the benefits of charging facilities and operating vehicles. Compared with ordinary electric vehicles, the super fast charging battery of Miaosheng shortens the charging time from about 2 hours to 3-5 minutes, which means that the number of times the charging pile can be charged per hour is increased by about 24 times, and the efficiency is greatly improved. go".

　　What is shocking is that in a private exchange with Dong Qiu, he revealed to OFweek Lithium Grid that the current cost of 5C ultra-fast rechargeable batteries is almost the same as the current cost of power batteries. Just imagine, if such power batteries reach cooperation with car manufacturers and produce real cars in volume, this will promote the entire industry to break through the bottleneck and greatly promote the development of new energy vehicles.

　　Real car experience, intuitively feel that fast charging is not a dream

　　According to the introduction, at present, Miaosheng super fast charging electric vehicle has completed 36,000 kilometers inspection, and has experienced four seasons of spring, summer, autumn and winter, as well as road tests in different environments and different roads. The car weighs 1700kg, is loaded with 23.8 kilowatt-hours of electricity, has a battery energy density of about 150wh/kg, has a maximum range of 202 kilometers, and consumes 11.78 kilowatt-hours of electricity per 100 kilometers, which is much lower than the current low consumption of 16 kilowatt-hours/100 kilometers.

　　You can see the current charging battery status of the car from the back box of the car, and you can see from the number of connected charging guns and the battery port that the battery supports three guns charging at the same time, which can greatly reduce the charging time.

　　In the actual test on site, it can be seen through the central control screen that the temperature of the MCU and the motor has basically remained stable within 40°C. The battery shape bar at the bottom shows the charged power, and the right side shows the mileage that can be traveled with the current power. After a few minutes of testing, the dashboard shows that the battery is fully charged. Intuitively seeing the extremely fast charging on the real car brought a deep shock to the audience present.