What are the trends in power battery applications?

Auto show is not only a bright new stage, but also an indicator of new technology trends. According to the exhibition organizers, there are 174 new energy vehicles at the Beijing auto show this year. Compared with the 2017 Shanghai auto show (159) and 2016 (147) Beijing auto show have expansion. New energy has become the main melody of the development of car companies. The core power behind cannot be ignored. Let take a look at the new energy vehicles power battery technology trends.

One minute to quickly understand the full text:

1, the density of production car battery system mostly in more than 140 wh/kg, the basic 300 km range.

2, battery costs falling, 300 ~ 400 km range models prices are locked in ten thousands to price range.

3, foreign car companies accelerate fuel cell technology application process, to improve domestic technology level.

4 Be recognised international mainstream car companies, domestic battery suppliers, form a complete set of majority.

The low ternary lithium battery for home

The Beijing auto show starting/listing of pure electric vehicles, basic all adopt the ternary lithium battery. Early a few years ago the auto show, lithium iron phosphate can and ternary lithium tied, is now gradually withdrew from the new energy passenger car market. Has two obvious change is that the original faction holdout BYD lithium iron phosphate, the new car is displayed using the ternary lithium battery. Leaf in morrowind qichen's in domestic product which the manganese acid lithium battery, and the other a platform with the leaf's latest models sylphy, pure electric is replaced by ternary lithium battery.

For passenger cars, the range, space, experience is very important, such as charging efficiency as a result, compared to lithium iron phosphate, lithium manganese acid etc., the ternary lithium batteries with higher energy density, better low temperature discharge performance and higher charge efficiency and other advantages, in a coppi passenger car applications.

From the open range information of the 33 models, 90% product comprehensive range of 300 km or more, thanks to the power battery energy density has increased, as well as further lightweight vehicle, low resistance.400 ~ 500 km range models also have a lot of, half of which is a concept car, 400 ~ 500 km range interval is expected to become the market mainstream.

In 2017, the ministry issued the medium and long term development plan for China's automobile industry, 2020 battery energy density to achieve 300 wh/kg, strive to achieve specific energy system 260 wh/kg, encourage power battery technology direction of high energy density. Information released from RGL center from 2018 to the present loading data, battery energy density from 2017 has obvious improvement, pure electric vehicle energy density Wh Wh/kg increased from 107.6 to 118.8 / kg.

Auto show the new products, often the most can reflect the new power battery technology trends. Existing models of, the vast majority of products of battery energy density in the more than 140 wh/kg, it also conforms to the subsidy policy guidance, 140 ~ 160 wh/kg models to 1.1 times the subsidies. Hippocampal new Mazda family E7 battery energy density compared to the highest, according to official information for 180 wh/kg. But the energy density and safety of the battery is a pair of contradiction, the higher energy density, enterprise was the more attention should be paid to safety. Application as a whole, production car battery level from 260 wh/kg, we still have some gap in the target, a number of battery experts assessment technology trends within the industry after, think that the energy density of a single goal is possible, but balanced, battery life and the cost of safety of comprehensive index has great difficulty.

From 2013 to 2017, power battery system costs fell by about two thirds, the ternary battery set the price of 1.4 ~ 1.5 yuan/Wh. Has clearly reflected in the product price change, or km range models, the price most lock in ten thousands to range. For example, the Beijing new energy listed latest EU5 pure electric vehicles, working condition of the range of 415 km R500 version subsidies after sale since 129900 yuan. As batteries improve the energy density and the optimization of system design, power battery manufacturing costs will also falling, pure electric vehicle battery system unit price in 2020 is expected to drop to 1 yuan/Wh, then within 100000 yuan to buy life five centuries km range will not be difficult.

Low fuel cell application process accelerated

In addition to the relatively mature lithium battery, fuel cell technology also begins to fall to the ground, the Beijing auto show debut three hydrogen fuel cell vehicles including love chi RG, BMW X7 concept car, the modern Nexo. Counting on usual exhibited fuel-cell cars of Toyota, Honda, saic, etc., to participate in the enterprise and the cars are on the rise, at least from the product level, fuel cell vehicles are a step closer to the consumer.

Before RG formal appearance, love passing car official is out the range of this car is as high as 1200 km, but it is 60 km/h under the condition of constant speed range, under the condition of constant speed 120 km/h, RG life can reach more than 600 kilometers. RG is through the fuel cell technology for such a long range, and usually hydrogen fuel cell stack, RG fuel cell system is restructuring type methanol fuel cell, namely restructuring after filling methanol conversion into hydrogen, hydrogen fuel cell stack system is direct hydrogenation. According to RG fuel battery supplier SerEnergy's official website, the system efficiency of 40-50%, in just 3 minutes to fuel. Before RG application, SerEnergy for Fiat500 provides a fuel cell raised Cheng Qi, make its mileage reached 800 kilometers.

As a new building car, love chi car walking on the RG this platform a distinctive technical route, but the current public information co., LTD., the concrete test technology remains to be seen. Officials say can now accept reservation, USES the limited customization, body pure handmade, the fastest can deliver by the end of this year.

BMW X7 concept car USES hydrogen fuel cell system, the power system is expected to be applied to future production models, but we do not publish detailed performance parameters. BMW R&D hydrogen fuel cell technology for 30 years, first launched in 2007 the world's first hydrogen-powered luxury high-performance cars BMW hydrogen 7, in the life can reach 700 km.Later, in 2015, BMW shows based on the BMW i8 and 5-series GT prototype models of hydrogen fuel cell vehicles, and said the relevant production models will be officially into the market in 2020.

Nexo is the second generation of hydrogen fuel-cell cars, hyundai Tucson Fuel Cell compared to the first generation, efficiency, space is smaller, lighter weight, low temperature cold start is wider, longer range. Modern official in this year, the committee on the BBS to introduce the car mentioned several "the most" : the world's highest efficiency 60%;The maximum range of 800 km (1, NEDC city operational standards);The world's highest level hydrogen-storage tanks 5.7 wt % (the weight of the storage of hydrogen fuel and hydrogen storage material weight ratio is 5.7:94.3).

To contrast the domestic development situation of fuel cell technology, countries in this field have also developed a technology roadmap, which put forward in 2020 to reach the highest efficiency 60% ", "cold start temperature 30 ℃ -", "5000 h life" and so on many indicators. Comparing the technology roadmap can be found that modern Nexo in efficiency, cold start temperature, the durability of the technical level, fall in China about 2020 years of technical targets.

Globally, each country and car companies did not give up hydrogen energy and fuel cell cars, China is also vigorously accelerate the promotion of hydrogen fuel cell car.Due to large volume of fuel cell system, the development of domestic currently not on passenger car is given priority to, but in public transportation such as buses, technology is relatively lower starting point, quickly cut into the more easily. Passenger cars only selected the ministry directory in the field of hydrogen fuel cell car sedan from Saic Roewe brand, on the whole, the domestic fuel cell technology remains to be developing.

"Four concept car officer Xuan a range of 1000 km or more

The auto show the new model has four so-called range of 1000 km or more, are the Yangtze river EV concept car C10, right K50 concept car, the path HKGT concept car, and the path H500 concept car, but the cars have not been made public what kind of working condition as well as the detailed technical route. Solely on the current lithium battery technology is difficult to support such a high range, the Yangtze river in the field of passenger car has developed relevant previous hydrogen fuel vehicles, do not rule out the car exhibition concept car is the fuel cell technology in the future.

The path group is not the first exhibited high range of models, from last year start successively appeared on each big mainstream international auto show, has been released six life concept car of 1000 km. The path walks in the field of passenger car 100% increase programs, the official said, this exhibition of three high range car powertrain are "generator extender and graphene super battery". At present a lot of research on graphene is staying in the laboratory stage, but the path claim of graphene passed the lab test, have to prepare for mass production stage. How concrete results to be the final production validation?

Low domestic battery suppliers supporting a majority

From the point of battery supply situation, worldwide, mainly in three areas of the industrialization of the power battery: Germany, the United States, China, Japan and South Korea in the east Asian region, and lithium ion power battery production of mainly concentrated in Japan and South Korea in the three countries., according to research center of RGL together from the perspective of technology and industry, Japan is still leading in technology, including solid state battery research, but the technical progress of China in the past two years, huge market share has overtaken Japan and South Korea occupy the first, power battery largest number, maximum capacity. Supporting conditions provided by the auto show, localized production of new energy vehicles were chose domestic suppliers, jaguar land rover, the public also chose the Ningde era as its global supply chain system.

Ningde era from the battery enterprise public information supports the most automakers and models, including 21 of 31 brand model. Ningde, the energy density of time square shell batteries at present stage has reached 240 wh/kg, technical planning is to raise its energy density batteries before the year 2020 to 300 wh/kg. Bick to nine brands also 12 product supply power battery, its 2.75 Ah power battery batteries energy density (18650) has reached 240 wh/Kg, and plans to achieve 300 wh/Kg in 2020. First, power enterprises are some facilities.

Japan and South Korea battery enterprise, Panasonic, LG, Samsung, SK are participating, but only invited customers to visit, very secret. In 2017, Samsung SDI co., LTD vice President Zheng Shixiong said publicly, Samsung SDI power battery monomer energy density current of 250 wh/kg, and is expected to reach 350 wh/kg in 2023.Panasonic, for tesla NCA18650 cylindrical power battery monomer energy density is controlled in 250 wh/kg, while 21700 monomer energy density has reached 300 wh/kg. From this energy density index, excellent domestic enterprise level close to the battery.

Editorial comment:

After several years of development, the application of power battery has more and more mature, will gradually fade into the background, the competition is no longer a car companies first, display elements. In the previous session of Beijing auto show, saic to prove the safety of the power battery to consumer, will also be battery directly in a tank filled with water in charge.On the annual auto show, the enterprise directly from the range, some intuitive, such as energy efficiency index to show its power system technology, especially the new forces of building cars in the application of new technology and high performance indicators on the pursuit of a more radical.

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