The contention of the future power battery - three Yuan VS lithium iron phosphate

Held on December 15, 2016, "2016 the 2nd China power battery assembles", Guangzhou power energy technology co., LTD. Parker technical director Liu Wenkai, according to a report in the existing system of materials under the framework, no matter how to improve technology, Lithium iron phosphate power battery Batteries energy density of 300 WH/kg hopes a little smaller. Relatively speaking, three Yuan is a promising technology route.

three Yuan, who is the future lithium iron phosphate technology mainstream has been debated. But it seems to some experts, the next three Yuan battery or will become the mainstream of cell line.

As the demand of the new energy vehicles, power battery range low also gradually exposed. Since 2016, multiple departments issued documents, revising the dynamic range of the battery, the energy density criteria. Formulated by the ministry of industry leading energy saving and new energy vehicles industry development planning (2012-2020), clearly put forward in the 2020 than energy to power the vehicle battery module of 260 WH/kg.

"Policy direction change, heralding the ternary battery will release soon."Liu Wenkai said.

The ternary battery will release soon

Power battery anode materials including lithium iron phosphate, three Yuan, lithium titanate and manganese acid lithium. Among them, the lithium titanate and manganese acid lithium energy density is low, the current domestic most used batteries is the lithium iron phosphate. In China, over the years there has been power battery cathode material should be taking lithium iron phosphate line or walk three Yuan route.

This kind of dispute even affected the policy direction. In January 2016, the ministry announced a moratorium on three Yuan for commercial vehicle to investigate its security.

However, in the near future, the ministry of industry and information technology held on further do a good job in the new energy automobile application safety supervision work stable cross will, on January 1, 2017, the new application of the new energy automobile application recommended models catalog of the use of the ternary cell of the bus, to pay a third party inspection report, this information is also viewed as three Yuan battery is about to unlock the fuse.

The personage inside course of study, according to the analysis on the test and thermal runaway expansion test by thermal runaway test under the premise of the ternary battery application in electric buses or will be lifted.

Industry experts believe that restricting the popularization of the new energy vehicles range is one of the main reasons for the problem, so it is imperative to improve the energy density of power battery, technical route and choose three Yuan is the most effective means.

Have to mention that about three Yuan and the technical route of the lithium iron phosphate battle continued for several years, and at the beginning of 2016, the ministry announced the suspension of the ternary batteries used in pure electric bus once put battery into the bottom three Yuan, also let the main technical route of three Yuan power battery companies get into trouble.

Ningde era of new energy technology co., LTD., marketing director Elgin, points out that suspension of ternary batteries, for safety consideration, lifted the ternary batteries because of safety standards, with safety standards, three Yuan and lithium iron phosphate can compete again.

According to the testing institutions, according to the existing power battery system, the risk of monomer battery is widespread, and low risk including leakage, deformation and exhaust, high-risk including fire, explosion, and so on and so forth. If the batteries in monomer thermal runaway, Batteries ternary material More prone to spark than lithium iron phosphate material, fire, explosion and other security problems.

However, the security of the ternary battery can be resolved, Liu Wenkai said, increasing the safety of the ternary battery can through the following three ways, "the first is to join in the ternary battery cathode material titanium silicon nanotubes to improve the capacity, guarantee the security of thermal runaway condition (good conductive titanium silicon nanotubes, flame retardant, provide capacity, cycle life extension of one to three times).

The second is to use solventless adhesives, PI dosage is one third of the PVDF, half of the cost of PVDF, heat curing, EB electron beam curing, can also be UV curing. Coating line, the length of only 12 meters long, energy consumption reduced by half, coating and the rate of 120 m/min. The third is to use a solid electrolyte, lithium battery life prolong double capacity of 300 watts/kg, and the cost by half.

It is understood that the country will continue to support in the future Three Yuan power battery Technical route. The personage inside course of study thinks, is expected to begin from 2017 to three years, countries will be populated for a number of policy measures aimed at increasing the safety of the new energy vehicles.

Data show that by 2020 China's new energy automobile market demand of power battery total close to 50 million kWh, among them the lithium iron phosphate will be after 2 years of slow growth, by 2019 the absolute demand will decline, rapid decline in 2020 to about 2020 kWh. Even with the industry predicted that "the next three or four years lithium iron phosphate will be new energy car out".

In 2018 is expected to field of pure electric passenger cars will be on three Yuan battery was released, the ternary battery demand will erupt. By 2020 will reach about 42.5 million kWh, which basically complete rule over China's new energy automobile market Lithium iron phosphate batteries Will transfer the center of the current market to storage areas.

Grab more than three Yuan battery development route in hand more insurance

Although three Yuan battery technology route can be more likely to reach 300 WH/kg, but also can't do without power. At present domestic industry such as BYD, ningde era giant started to grab three Yuan battery market share.

Learned, BYD has been sticking to the lithium iron phosphate battery technology route, and in the recently, BYD chairman secretary Li Qian said BYD future expansion of the ternary lithium battery layout, BYD battery capacity is expected to 2016 GWH 10, 2017 new ternary battery capacity 5-6 GWH.BYD large-scale layout ternary lithium batteries, means that three Yuan battery technology route will be dominant in the future. The technical characteristic, of course, more product portfolio and conducive to grab market share.

Elgin revealed at the same time, the current era of ningde and ternary lithium iron phosphate capacity proportion in 2:1, based on the requirement of the market to improve the energy density, three Yuan battery technology route or will become the industry trend, next year, the company will increase the layout of the ternary technology.

The second half of 2016, in fact, many companies have started three Yuan battery project layout, such as the state's group invested 1.226 billion Yuan, annual output of 35000 tons of ternary precursor project; Expansion has wisdom energy capital of 3.114 billion Yuan, foster high-end ternary lithium electricity production line; Heng Dian east magnetic spent 3 billion layout ternary lithium batteries; Green beauty to buy three Yuan precursor production line, teamed up with state general layout ternary lithium batteries; The porch high-tech power ternary lithium battery.

Subject to release three Yuan "message has not yet been confirmed and security of the ternary lithium battery electric buses still skeptical attitude. Therefore, battery manufacturers continue to stick to the layout of the lithium iron phosphate at the same time, also need to do three Yuan technical reserves, after all, the future for a long time and ternary lithium iron phosphate will coexist.

However, China's vehicle industry technology innovation alliance, deputy secretary general Luo Huiming stressed that the battery itself too many unsafe factors are relatively ternary batteries, lithium iron phosphate is safer, more suitable for the beginning of new energy vehicles, because the new energy cars just for promotion, once appear, safety accident can cause devastating.

"Three Yuan battery and lithium iron phosphate has the advantages of higher energy density than battery."Luo Huiming thinks, with the rapid development of the electric car market, people is higher and higher requirement for the energy density, range is almost pure electric vehicle technology level of the key indicators. After China's power battery technology route is given priority to with lithium iron phosphate batteries, however on subsidies policy in the new energy vehicles began to tilt to the power density and range.

The development of high energy density power battery system has become an international trend. According to statistics, the ternary material batteries currently accounts for more than 80% of the global power battery market, and our country power battery cathode material ternary accounted for only about 30%.

"In the new energy automobile power battery market in the world, the United States, Europe, Japan and South Korea started to ternary lithium battery as the main technical route, the Japan and South Korea, Panasonic, Samsung, LG chemical, AESC is outstanding in this field."Luo Huiming thinks Tesla and Panasonic battery cooperation in three Yuan will do well.

In early 2016, Tesla CEO Elon musk - announced a joint Panasonic in the Nevada desert to invest 3.7 billion pounds to build a capacity of up to 35 GWH ternary battery factory, the factory production capacity is almost equivalent to the sum of the global market capacity of power battery now, after will be able to meet the 460000 Tesla Models, ModelX and requirements of power battery Model3, battery production cost will reduce 30%.

"However, this does not mean that the future will definitely ternary lithium batteries over the world."Liu Wenkai said, never stopped industry for technology and material mining, like all solid state battery has brought the new ternary new material structure and new battery pole piece, is three Yuan battery provides a new structure and raw material choice, so a higher energy density and safer performance always is the enterprise trying to balance the two propositions.

New energy automobile competition is the core of the dispute of power battery, power battery technology route "will continue, three Yuan or lithium iron phosphate, and other new technology will be decided by the market demand," both passenger cars and buses, safety problems must be auto enterprise R&D and manufacturing products considering the primary factor."Luo Huiming believes that only by constantly improve the technical level, production reached safety technical standard of battery is the way of production.

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