What are the reasons of High nickel 811 ternary lithium batteries being popular?

1, Under the effect of both policy and market, high nickel NCM811 becomes the popular objects battery manufacturers in China.

2, Power battery enterprises including bick, tianjin lishen, byd, penghui energy and yiwei lithium energy have invested in the research and development and production of NCM811 technology.

3,Cycle life and safety of domestic experts think NCM811 is still short board, also face the bottleneck, such as technology and upstream materials supply express concern about its too fast on the market at the same time.

4, Industry experts predict that NCM811 batteries can be commercially used after 2022.

Why does the high nickel 811 ternary lithium battery wind up?

NCM811, namely, the ternary lithium battery with the content ratio of nickel-cobalt-manganese in the cathode material being 80:10% and 10%, represents the route of the highest energy density and the highest technical content in the field of ternary lithium battery at present. Nickel cobalt manganese sliding aluminum nickel and cobalt NCA are ternary lithium batteries, due to their high NCA battery technical barriers, and Japanese monopolized the NCA material market, the Chinese battery maker in integrated technology conditions, technology, cost and other factors, most of sliding route choice.

Different proportion according to the dosage of nickel, cobalt, manganese, nickel, cobalt, manganese ternary lithium batteries can be subdivided into specific 111 type, 523 type, 622 type and 811 type, etc. The main function of nickel in lithium-ion batteries is the laconic capacity, which makes them more energy dense. Public data shows that material NCM811 g capacity can reach 190 mah/g, higher than the current mainstream domestic power battery NCM523 g capacity is 166 mah/g.

NCM811 as China's battery makers rush object, has multiple causes. First of all, the policy has been in power battery energy density as the key indicators to guide the new energy automobile industry development, at the same time will be the new energy subsidies and power battery energy density. In addition, according to the auto industry long-term development planning, target by 2020, the energy density of power battery monomer reached more than 300 Wh/kg, strive to achieve 350 Wh/kg, system energy density to achieve 260 Wh/kg, costs have fallen to below 1 yuan/Wh.

According to the situation of industry, NCM523 highest energy density of 200 wh/kg, NCM622 and NCM811 can reach more than 230 wh/kg and 280 wh/kg.If rely on ternary lithium batteries achieve the goal of 2020 260 wh/kg, only NCM811 could do.

Second, as the key material of cobalt metal ternary lithium battery prices soaring, reversed transmission battery companies choose NCM811 route. Ternary lithium battery market after recent years of development, lithium, cobalt and other metallic resources tight, especially cobalt metal, its price from the end of 2016, 270000 yuan/ton to 2017 year-end 534000 yuan/ton, surged 97.8%. And the price of a ton of electrolytic nickel, currently has 110000 s. 811 route of nickel content, reduce the content of cobalt, can also result in cost reduction.

High nickel 811 companies into the bureau

Under the new policy and market environment, many Chinese battery companies announced or planning the r&d and production of high nickel project 811, so 2018 is also the industry called high nickel production in 811.

In May this year, bko battery was the first to announce the mass production of 3.0Ah cylinder 18650 battery NCM811, and the battery energy density was increased to 250Wh/kg. As the earliest production NCM811 battery enterprise, bick provide customer list shows the industry's passion for new technology route: according to introducing, bick NCM811 battery has been applied in zero run, xiao peng, cloud, jianghuai, saic chase, Beijing auto companies such as new energy vehicles. Great energy also revealed that, the company NCM811 material of 2.8 3.0 Ah Ah, cylindrical 18650 battery production, and began to supply to the oems.

Besides bick and great energy that has the capability of mass production, some domestic battery companies announced the 811 high nickel layout in the future. The tech center announced earlier this year, has developed three yuan 811 soft package of batteries, the energy density reached 302 wh/kg, pilot line, has started construction related products plan construction production line in 2019. In addition, the porch tech centers have been identified for ford's joint venture with zhongtai company developed the first models provide three yuan 622 type power battery.

Tianjin lishen battery co., ltd. is one of the few battery companies in China planning NCA and NCM routes at the same time. Lishen plans to increase the energy density of individual battery cells in passenger cars to 350Wh/kg by 2022. At present, tianjin lishen NCM811 have small batch supply, NCA were as enterprise long-term plan.

Byd has announced in June this year the NCM811 power battery research and development, significant progress will be put into use in the second half of 2019, and will be established in power battery with changan, on the basis of the joint venture company, investment of 5 billion yuan in chongqing build 10 811 GWH high nickel battery capacity.

But there are enterprise technical route of NCM811 cautious. As power battery shipments ranked the first enterprise in China, was found in ningde age had been launched in 2019, 811 high nickel battery, but the official declined to comment to this report said. At the same time, the car companies, chery new energy also no foreign procurement NCM811 plan, that is because of the technical maturity of NCM811, security remains to be verified.

Think globally, in addition to panasonic for exclusive supply NCA tesla battery, the south Korean companies, led by SK, LG chemical, research and development progress is not smooth. At the beginning of this year, South Korea's hyundai KonaEV pure electric SUV with LG chemical NCM811 soft pack battery was launched. The two sides agreed to put it into the market within this year, while South Korea's SK announced in late August 2017 that it would mass-produce the NCM811 battery for electric vehicles in August this year. But LG chem recently confirmed that this year will only produce cylindrical NCM811 batteries, used in electric buses.SK has confirmed it will delay NCM811 batteries for electric cars.

Experts: NCM811 system need to strengthen the validation, or towards commercialization after 2022

"Current limit NCM811 main reason for the mass production is craft level, followed by some technical bottlenecks are still to be solved, high nickel ternary material supply system is still not perfect." Since 2013 engaged in high nickel jun-feng ma yuan materials research and development of power battery experts NCM811 on preparation technology, equipment and production environment is extremely high, this is the main factor limiting NCM811 scale application; And NCM811 to form a complete set of high pressure for its electrolyte, the diaphragm and other material requirements are far higher than ordinary ternary battery, at the same time to the downstream of the battery thermal management technology also has a high threshold, this cause the commercial application of the actual NCM811 distance still has a distance.

Several industry experts are a relatively consistent opinion." NCM811 system need to strengthen the validation work, it is not have the ability to commercialization, is expected to 2022 for business applications." State 863 electric cars special power battery testing center, director of the institute of north China vehicle power battery lab zi-dong wang believes that the present technology to see, high energy density batteries tend to have low life and poor security problems, these problems must be solve before batch applications.

In jun-feng ma opinion, single ascending energy density is at the expense of power battery performance under the premise of other. Even if panasonic monomer for tesla energy density of 300 wh/kg 300 nca batteries, but its cell cycle life did not reach the current mainstream ternary material battery 2000 + level.

"Bick when closed NCM811, there will be a loop attenuation below 80% in less than 1000 times, this is especially common in the research and development of the early." Technical personnel said. As the first domestic enterprise production NCM811 battery, bak battery has installed over 0.3 GWh NCM811 battery, power battery overall market share of 1.3%. Even if has a mature research and development production experience, bick also failed to avoid missing battery cycle life of the negative impact.

In order to avoid the impact of high specific energy battery life reduction, the car companies have taken different measures. By way of the ascent to 100 KWH battery system capacity, Tesla reduce the single discharge depth of single pieces of batteries, so as to prolong the service life of power battery in disguised forms. And application of bick NCM811 battery jianghuai, also said only purchase monomer batteries, the battery Pack (Pack) and BMS, battery technology is our independent research and development applications such as surface."Jianghuai passenger car marketing company deputy general manager Wang Guangyu tell family of cars at the same time, the current jianghuai iEV7S and iEVA50 only two models using bick NCM811 batteries.

NCM811 batteries in addition to cycle life is not perfect, its safety compared to common ternary lithium battery is low." From the point of view of material performance, NCM811 battery life and overcharge safety performance than NCA battery, the dosage of the cobalt is also higher than NCA." Huang, a researcher at the Chinese academy of sciences institute of physics, said, "my suggestions to the enterprise is only a little, not to follow suit."

"High nickel ternary material by material modification, surface coating, increasing voltage, adjust the anode materials and so on a variety of ways to improve its security. NCM811 high specific energy and long cycle life, high safety and so on can exist at the same time, but at present domestic to reach such a level, also may be able to realize after three to five years."Jun-feng ma honest, either in his previous team, in the production of products or other market NCM811 product applications at present, performance is very "general".

"Even manufacturing process and quality control level are very advanced Korean companies, such as samsung and LG chem postponed NCM811 battery the size of the production and application, this side shows that the technical route is not yet mature."

As the highest energy density of power battery field with the highest technical content of the course, under the dual role of policy and market, NCM811 has become the key layout of many domestic battery enterprises. However, high specific energy is still in conflict with long cycle life, high safety, immature technology and materials and other comprehensive factors. No matter industry experts or new energy practitioners, who do not want to break the possibility of overtaking China's new energy corners, but we should still be rational to see that NCM811 is still a long way from large-scale application.

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