Technical route, security, recycling experts What sentences to the dynamic lithium battery industry?

Автор: Iflowpower – Kannettavien voimalaitosten toimittaja

The power lithium-ion battery is "heart" as a new energy car, and its importance is self-evident. With the rise of electric vehicles, the production of dynamic lithium-ion battery is constantly added. According to the data released by my country's Automotive Lithium Ion Battery Industry Innovation Alliance It is 65 billion yuan, the whole society is constantly improving the focus of the power lithium-ion battery, even if consumers buy cars, they all understand that the battery used by the vehicle is three yuan or lithium iron phosphate.

As the prior art is constantly mature, what should the next power lithium-ion battery technology route? The thermal discussion caused by electric vehicles from retarded, how will future battery safety will be guaranteed? Some data shows that my country's retired batteries will reach 100GWH, the company, what is the planning of battery recovery and reuse? At the 2021 global new energy and intelligent auto supply chain, the 2021 global new energy and intelligent auto supply chain, the industry expert, and the company have shared some considerations for the future development trend of the dynamic lithium-ion battery industry: power The lithium ion battery will be technically improved around "nickel nickel", and the final direction is a solid battery; the power lithium ion battery safety will monitor the algorithm model by more accurate data collection while using stabilizing materials; Recycling should work with the company to work with the company to achieve the use of the ladder, and create a "urban mine". Power Lithium Ion Battery Technology Path: Cobalt Cobalt Situation In the long-term direction, according to the vice chairman of the my country Battery Industry Association, Huang Xuejie, the mainstream of my country's new energy vehicle mainstream dynamic lithium-ion battery has two, respectively, high security Low cost, limited miles of iron lithium-ion batteries and long, slightly higher prices, safety have a three-dimensional lithium-ion battery, which has a good performance in the market. The industry introduces the reporter that the current technology, there is further development space, the important direction is to increase energy density, reduce cost, to better travel to market, attract consumers, which can also better Promote energy conservation and emission reduction.

The battery material is important to force low cobalt batteries. Due to the rare cobalt resources in my country, most of the cobalt resources are concentrated in African countries, not only high imports, but also the global reserves are also limited. Therefore, the development of battery technology must reduce the cobalt elements in battery positive electrode materials.

Now major companies, institutions are pushing low cobalt, or even cobalt-free batteries. Where is the direction of low cobalt and cobalt-free batteries? Huang Xuejie shares the development path of nickel, lifting nickel, and the core of "decrease" as the core, and develops a nickel-manganese acid lithium-ion battery. Before and after 2010, a hot-selling electric car listener in Nissan has adopted a battery-manganate ion battery that is completely different from the current technology.

This battery is safe, but the endless mileage is limited, Huang Xuejie believes that 1/4 of Manganese can be converted into nickel (compared to the low cobalt high nickel ternary lithium ion battery compared to the low-cobalt high nickel with low cobalt high, Also decreased, in this way to increase the high pressure of the battery, then match the graphite negative electrode, the nickel-manganese acid lithium-ion battery voltage can reach 4.5V, which is higher than the standard voltage of the lithium iron ion battery and the three-dimensional lithium ion battery. Energy density advantage, effectively enhance life.

Huang Xuejie further explained that the nickel-manganese acid lithium-ion battery was re-increased by only 40% of the volume energy of the phosphate ion battery unit volume energy than the phosphate ion battery unit, and the cost was reduced by 20%. At present, the technical bottleneck of the nickel-manganese acid lithium-ion battery is important in high temperature and cycle, Huang Xuejie said that his team has achieved breakthrough in this area. Disclosed.

The second development path introduced by Huang Xuejie is based on the three-dimensional lithium-ion battery, and the cobalt rises. While nickel is lower than the cobalt, it can supply a higher energy density for the battery and improve the battery life. The internal capacity of high-nickel low cobalt can be increased from 160 mAh / g to 180mAh / g, continued to increase to 200mAh / g.

The limit is the lithium-ion battery that is completely removed from the cobalt, combined with the upgrade of the negative electrode material, and the energy density can be increased by 40% more than the ternary lithium ion battery, from less than 700 in the stage to 1000Wh / L. The breakthrough of this technology is currently good enough life and stability. New Energy Car Giant Tesla is now in power to high nickel low cobalt battery technology.

Xiao Chengwei, a research firm of my country's Electronic Technology Group Company, also mentioned that the current high-nickel-based three-membered materials can also create solid-liquid mixed batteries, such batteries as a transition technology and products will also have a very good development prospect. The publication shows that it is planned to be equipped with semi-solid battery technology on the new sedan ET7. In addition, Huang Xuejie also mentioned the development of solid state batteries.

In his view, the solid-state battery is a revolutionary technology. The "heroes" in the country are fighting for the project. I hope to make a full solid-state battery through the principle innovation.

Strive for the next generation of 600WH / kg, the battery is even Can support the operation of the aircraft. Improve the powerful lithium-ion battery safety two steps to upgrade materials, improve monitoring ability Chairman and CEO, Chairman and CEO of Shanghai, in charge, with the continuous expansion of the new energy car, the battery has appeared in the past few years Less security issues, consumers also pay more attention to electric vehicle battery safety issues. In this regard, the national regulations are rigorously strict, and the standards have been established in BMS, discharge mode, etc.

in the 5-minute predetermined, in advance of the thermal out-of-control. In the view of Huang Chendong, in order to make the safety of dynamic lithium-ion battery continue to increase, the company should continue to apply more stable materials, on the other hand, do data monitoring. Huang Chendong introduced that whether it is a low-nickel technology that is concerned about the industry, it is also a solid state battery that has been hoped, and they use more secure materials.

In addition, the company also adds to the battery pack to the power-on protection system. The battery is added to the short-circuit material, the liquid cooling constant temperature system is used to upgrade the battery safety; the 4S shop should check the mechanical structure of the vehicle battery when consumer maintenance, The company should judge the battery in the usual data by monitoring, and daily monitoring is especially important. Huang Chendong believes that everyday data monitoring has two important technical links, one is to achieve accurate and high-frequency data collection, and the other is to establish a correct stress model for data analysis.

Ding Xiaohua, deputy director of the Shanghai New Energy Automobile Public Data Acquisition and Monitoring Research Center, also mentioned that data acquisition frequency is highly improved. my country's current standard is a set of data in 30 seconds, and many companies have requested 10 seconds in the actual sampling process. However, the data that appears in these two frequencies not only cannot reflect the battery characteristics, but also is also relatively limited in some traffic accidents.

So Ding Xiaohua, Huang Chendong mentioned the increase of data collection frequencies to 1 second. On the one hand, the battery can be warned and on the other hand, and the relevant data can also assist the event backtrack in other fields. In Huang Chendong, in addition to improving the data acquisition frequency while ensuring accuracy, the battery monitoring company also transforms from the past single stress model from the past.

The multi-stress model is to be superimposed on the software design, and the battery magnification, temperature, discharge depth, high voltage and other factors are superimposed. The abnormal characteristics of a stress model cannot be causing the battery, resulting in no early warning. In short, the safety of battery systems must not only have improved material technology, but also have a full-cycle monitoring management, both are an important part of future technology development.

2025 dynamic lithium-ion battery retirement over 100GWH ladder utilization and recovery reduced battery costs more than 20% over the new energy vehicle experience for many years, some vehicles have entered the scrap session. Battery recycling and reuse gradually entered people's field of view. Secondary executive Wang Pan, senior executive, said that in 2025, my country's dynamic lithium-ion battery accumulated retirement will exceed 100GWH, a large number of car batteries face retirement, on the one hand, most of these batteries are still in a good state, but no longer satisfied The vehicle rule-level requirements can be used as energy storage batteries; on the other hand, these batteries are rich in rare metals, which can be regarded as "urban mines" and refine again.

The ladder uses a collaborative development urban mine to recover the power lithium-ion battery, which can not only reduce carbon emissions, but also alleviate the rising prices of upstream raw materials and the shortage of metal resources, dependence on imports. According to the data of Bao Wei, General Manager of Jiangsu Huayou Circular Technology Co., Ltd.

, 2020 Congo's cobalt content reached 51.5% of the world, and my country is only 1%. Carry out the use of battery traders, it is necessary to develop "urban mines".

The ladder utilization and recovery of the power lithium-ion battery have a more active market, and its profits have gradually emerged. Wang Pan said that from the entire battery recycling, the application scenario of the ladder is used in the way of renting sales, and the economic level of the low-speed bicycle or the tricycle is relatively good, the investment cycle is short, the street light , Ship, base station standby, energy storage is also a good development direction. From the perspective of regeneration, the profit of the three-yuan lithium-ion battery in dynamic changes has always been good.

As the price of lithium carbonate, the regeneration and utilization of lithium iron phosphate ion batteries also has higher profit space. Xiao Chengwei also mentioned that the price of iron phosphate has risen to 200,000 / ton, and the economics of the entire phosphate resource regeneration has already been very full. Bowei introduced the reporter that under the applicable scene, the company can reduce the battery cost by more than 20% by the company's secondary use and regeneration.

In addition, Wang Pan also shared the situation of reuse of dynamic lithium-ion battery internationally. In 2020, the recycling of the dynamic lithium-ion battery in 2020 issued a series of guiding policies such as the "New Battery Materials", which proposed a proportional requirements in the contents of the regeneration materials in the new battery materials, or directly or indirectly promoted battery recycling. Utilized industrial development, even forming a carbon trade barrier covering full life cycle.

Under the changing international situation, the government, the company works in to promote the use and recycling of battery traders. At present, the country is also guiding the ladder of the dynamic lithium-ion battery. The Ministry of Industry and Information Technology has been jointly issued in August in August.

Wang Pan supplementation, there may be some mechanisms, subsidizes, financial support, and recycling of battery ladder. Picture (Source: Beijing News Seashell Finance / Author: Bai Haotian).