What has changed with the appearance of BYD blade batteries?

Power lithium-ion battery is an important symbol that distinguishes traditional fuel vehicles from new energy vehicles. At the same time, the power lithium-ion battery is also the core of electric vehicle users' attention, because it is closely related to the safety, battery life and even the price of the entire vehicle. ●Is the ternary lithium-ion battery necessarily good? ●Unfortunately, battery technology has not achieved major breakthroughs in recent decades. So far, although fuel-powered lithium batteries, solid-state batteries, new-material batteries and other technologies have made progress, there are still certain limitations in achieving large-scale commercial use. So how to achieve the improvement of battery technology under the premise of commercialization is not only the research goal of new energy companies, but also the new energy research and development topic of vehicle manufacturers. Judging from the current battery load, power lithium-ion batteries basically fall into two categories: ternary lithium-ion batteries and lithium iron phosphate batteries. Among them, the ternary lithium-ion battery has the characteristics of higher energy density and better charging efficiency, and is often considered by consumers as a better choice than lithium iron phosphate batteries, and even uses this to judge which electric car is more valuable to buy . However, the disadvantages of ternary lithium-ion batteries such as poor thermal stability and high cost are often overlooked. In this case, wouldn't it be a better choice for a lithium ferrite battery with slower heat release, less heat generation, less susceptibility to fire, and a more controllable cost to solve the energy density problem? Some people say that power lithium-ion batteries are difficult to achieve 'best of both worlds'. It was not until the emergence of BYD blade batteries that some people's views were changed. ●What are the advantages of blade batteries? ●Although the blade battery still belongs to the category of lithium iron phosphate battery in essence, it has the characteristics of better safety, more flexible structure, and higher energy density due to the innovation of the overall internal and external structure. This time, the electric man was also invited to visit BYD's Fudi battery factory in Chongqing to explore more secrets of blade batteries. Fudi Battery Factory, located in Bishan District, Chongqing, started construction in February 2019. It is currently the only production base for blade batteries with a total investment of 10 billion yuan and a planned annual output of 20GWH. A lot of BYD's original blade battery production lines and production equipment were born here, and a number of highly confidential core technologies are 'hidden'. The production of BYD blade batteries has to go through 'eight major processesAt the same time, the manufacturing of BYD blade batteries has very harsh conditions. For example: in some key processes, the blade battery production workshop will achieve no more than 29 particles of 5 microns (hair length 1/20 thickness) within one cubic meter of space, which meets the same standard as the LCD screen production workshop ; The pole piece of nearly 1 meter long can realize the tolerance control within ±0.3mm, the single-piece lamination efficiency within the accuracy and speed of 0.3s/pcs; the accuracy of the batching system is within 0.2%; both sides are coated and coated at the same time The maximum width of the cloth is 1300mm, and the deviation of the coating weight per unit area is less than 1%; the rolling speed of 1200mm ultra-wide width can reach 120m/min, and the thickness can be controlled within 2μm. BYD’s original production equipment, core technology and high standard requirements enable the blade battery system to achieve an energy density of 140Wh/kg, which is not much different from the current mainstream ternary lithium-ion battery 160Wh/kg ratio, said Li Yunfei, deputy general manager of BYD Auto Sales , 'The first BYD Han EV equipped with blade batteries has a cruising range of 605 kilometers under comprehensive conditions.' In addition, the blade battery can charge from 10% to 80% in 33 minutes and charge and discharge more than 3000 times. It can travel 1.2 million kilometers, and the performance of low temperature performance beyond the imagination of the industry is extremely safe. Through the on-site acupuncture test, the blade battery's 'plain as water' performance has proved its high safety, and safety is the core advantage of the blade battery, which is also the goal that ternary lithium-ion batteries are difficult to achieve. ●What has the blade battery changed? ● In addition to the existing advantages of BYD blade batteries, BYD will also plan a new generation of products with a single energy density to weight ratio of more than 180Wh/kg in the next two years. More efficient, safer, and cheaper, the user's pain points that the blade battery can solve, make it the most worthwhile power lithium-ion battery pack at present. The emergence of BYD’s independent sub-brand Verdi Power is to meet the needs of other automobile manufacturers for power lithium-ion battery packs and even the entire new energy power module. Therefore, “basically, the brands you want are now talking to BYD. The cooperation of blade batteries.” It can be seen that with its unique advantages, blade batteries will definitely change the current market pattern of the new energy industry. For consumers, the longer battery life, extreme safety, and reasonable price that blade batteries can provide provide the most valuable reasons for buying new energy vehicles. Imagine that after the large-scale use of blade batteries, an electric car that can last more than 400km and will never self-ignite is only priced at 100,000. Why not buy it? ●Written at the end ●The ideas and value of BYD blade batteries for the development and supply of the industry and the entire new energy technology are of great significance. Moreover, BYD’s breakthroughs in batteries have also proved that there are still many directions that can be tried and developed within the existing battery framework, which has also driven the enthusiasm of the entire industry and deserves to be respected.