Since a while, many self-ignition accidents in electric vehicles have worried about the quality of electric vehicle power lithium batteries.. Therefore, there is a moving lithium battery, attracting the attention of everyone.
. Recently, the Ministry of Industry and Information Technology, the eighth batch of “New Energy Automobile Promotion Application Recommendation Type” (hereinafter referred to as “Directory”) announced, 5 models are selected to lithium iron ion batteries, including Chery new energy new model small ants. It replaces the three-dimensional lithium ion battery used by the current model to the lithium iron ion battery.
In fact, in the context of subsidiants, electric vehicles are safe and worried, some cars are re-aimed at lithium iron phosphate ion batteries.. “This is the choice made after the comprehensive safety, performance, cost, market, etc.
, although the lithium iron-free battery and the three-dimensional lithium ion battery have each other on some parameters, but with some power lithium batteries The advancement of company technology, the advantage of lithium iron phosphate ion battery is increasing. “Hunan University Materials Science and Engineering Academy” Huang Hongwen said in an interview with reporters. Lithium iron phosphate ion battery is increased from the market.
At present, iron phosphate ion battery cost is lower than the ternary lithium ion battery, like a small antique A00-level micro-electric vehicle, using a lithium iron ion battery is important for cost-effective considerations. Before Chery, Jianghuai’s new energy has begun to carry a lithium iron-phosphate ion battery for its IEV6E models, and the same product also includes high-intensive mileage versions equipped with a ternary lithium-ion battery..
In A00-level electric vehicles, in addition to Chery Small ants and Jianghuai IEv6e, SAIC E100 and E200 also uses three-dimensional lithium-ion battery and lithium-phosphate ion batteries, which also announced in the Ministry of Industry and Information Technology. 7 batch “directory” has been confirmed. In addition, from the few “directories” issued by the Office of Working Department in 2019, the ratio of lithium iron phosphate ion batteries is also gradually improved.
. In the first batch of “catalogs” this year, there are 73 models that choose to choose the phosphate ion battery, accounting for 50%; in the second batch of “catalog” this year, there are 49 models. With 58.
3%. In the third batch of “catalog” this year, there are 164 models that are selected to select the phosphate ion battery, accounting for 61.9%; in the fourth batch of “catalogs” this year, the models of the silicite ion battery are used.
244, accounting for 69.7%. It is not difficult to find that the total ratio of the fourth batch of “catalog” has been reached nearly 70%, only the four batch of accumulated models will be 530.
. Therefore, the model in the eighth batch of “catalog” this year is reduced because some models using lithium iron phosphate ion batteries have basically completed the option, and they have entered a relatively stable period..
“More and more car enterprises, models are used for lithium iron phosphate ion batteries because their safety performance is relatively good, which also reflects the safety needs of the market to some extent.. “Professor Peking University Chemistry and Molecular Engineering, the director of the New Energy Materials and Technology Laboratories believes in interviewing reporters.
In addition to Chery and Jianghuai, the two batteries are in addition to Chery and Jianghuai.. Among them, BYD, which is both cargo, also producing power lithium batteries, its actions are worthy of attention.
Recently, BYD revealed that the new generation of phosphate ion battery will be launched in May 2020, the volume is 50% higher than the energy density, the life is 8 years, and the cost can also save 30%.. According to reports, BYD’s odd phosphate ion battery is due to the solid advantage of lithium iron phosphate ion batteries, which is high, and the price is relatively cheap.
. However, the energy density of the lithium iron phosphate ion battery is still not as good as a three-dimensional ion battery. One of the faucets of lithium iron phosphate ion battery, BYD has been working hard to break through its energy density ceiling.
In 2018, BYD once stated that the lithium phosphate ion battery cell energy density can reach 165Wh / kg, including 140WH / kg. In the next two years, its planning increases the monomer energy density of the lithium phosphate ion battery to 180Wh / kg or more, and the body is increased to 160Wh / kg..
From a market perspective, the application of lithium iron phosphate ion batteries is closely related to new energy car subsidies.. Prior to 2017, the amount of lithium iron phosphate ion battery in the new energy vehicle area accounted for 70%, and after the new energy car subsidy, the market, the market of lithium iron phosphate ion batteries was gradually Falling, the market share fell to 39% afterwards this year.
But this year is just a turning point. As new energy car subsidies are getting more and bigger, in view of the pressure of reducing cost, the car companies also re-turn the lithium iron phosphate ion battery. According to the data, the market quotation of the phosphate ion battery cells in 2019 has dropped to 0.
7 yuan / WH, the quote of the ternary battery cell is about 0.9 yuan / WH, the gap is beginning to expand. With 2021 new energy car subsidies will be fully exited, the price advantage of lithium iron phosphate ion battery will continue to be prominent.
The analyst of the automotive industry said, if a pure electric vehicle replaces the lithium iron battery from the three-dimensional ion battery, the new energy car subsidy will reduce the resiliency of about 2,000 yuan, but the battery cost can save 12,000 yuan.. In addition to cost, there is also safety factors.
From the material characteristics, the thermal out-of control temperature of the lithium iron phosphate ion battery is generally above 500 ¡ã C, while the critical point of the three-dimensional lithium-ion battery is less than 300 ¡ã C, some high-nickel-based lithium ion batteries are as low as 200 ¡ã C.. According to reports, with the advancement of lithium iron phosphate ion battery technology, the energy density increases, it will be possible to break its original renewal mileage bottleneck, and the three advantages of its three advantages will be more prominent.
First, the safety performance is highlighted; The number of times can reach 3,500, almost twice the three-yuan lithium-ion battery 2000 times, which will greatly reduce the cost of the user to replace the battery; three, battery manufacturing does not need precious metal materials, especially if it will not use rare metal cobalt, this makes it The manufacturing cost is low, which will greatly reduce the cost of purchases.. These advantages, more highlighted after new energy car subsidies.
Of course, there is still a significant disadvantage in the lithium-phosphate ion battery and the ternary lithium-ion battery. In addition to the energy density, the anti-low temperature capacity is also poor, which will restrict the use of lithium iron phosphate ion batteries in the northern market..
Under low temperature conditions below -10 ¡ã C, the lithium phosphate ion battery attenuation is very fast, less than 100 charge and discharge cycles, the battery capacity will drop to 20% of the initial capacity.. The low temperature performance of the ternary lithium-ion battery is excellent, even in the condition of -30 ¡ã C, the normal battery capacity can be maintained, and it is more suitable for the conditions of use in the northern low temperature area.
. In the future, the “Power Lithium Battery Blue Paper” (2019) announced in the future or will be pointed out that the vast majority of the pure electric passenger vehicle uses a three-yuan battery. As the amount of production and sales increases, the three-dimensional ion battery has occupied mainstream.
market. In 2018, the electric passenger car performance in the market, the total support of the three-yuan lithium-ion battery exceeded the lithium-phosphate ion battery, occupying the market, accounting for 58%. And iron phosphate ion battery market share accounts for 39%, and it is important to apply to the bus market.
. Overall, most companies have dotted on the three-dimensional ion battery, such as CATL, Bike battery, Yip Lithium, Far East Foster, etc..
Japan Panasonic, South Korea LG Chemical, Samsung SDI, etc. Power Lithium Battery Company also uses the technical route of the three-dimensional ion battery. About the lithium iron phosphate ion battery, industry perspective, energy density is the greatest challenge of lithium iron phosphate ion battery.
From this point of view, it is not possible to develop the same as the three-yuan battery as the three-yuan battery. This feature allows the lithium iron phosphate ion battery to be limited in a particular application. At present, the lithium iron phosphate ion battery is important in the market.
Commercial vehicle. However, under the situation of the new energy vehicle financial subsidies, the new energy vehicle emphasizes high quality and low-cost development, the dynamic lithium battery industry has developed positive and growing market competition and challenges, the future, lithium iron phosphate What kind of development pattern will be presented to the ion battery and the ternary battery. With the gradual slope of financial subsidies, 2018 development does not account for excellent lithium iron ion battery has counterattack.
In addition to the new energy bus, the application range of lithium iron phosphate ion batteries is expanding, such as Jianghuai, aiming at the low-decisive ride market for lithium iron phosphate ion batteries.. In the perspective of Jianghuai, in the long run, my country’s electric car market is not only concentrated in a second-year city, and consumers on three or four-tier cities and even townships.
The three-way battery products of the main renewal feature are not suitable for their commuter. Short use characteristics, opposite, low price, lithium iron phosphate ion battery with long life is more competitive. Industry people think that two types of batteries or synchronization will be developed in the future.
“With the advancement of technology, if you can extend weakness, lithium iron phosphate ion batteries and ternary lithium ion batteries can find the best choice for their own market, is the best choice.. “Zhong Jing believes that this is an indispensable foundation for developing new energy .