Power battery market

Defects in the lack of control over the industrial chain caused by defying technology in some domestic industries may spread to the power battery market. As the domestic new energy vehicle market is increasingly showing an explosive trend, many participants are rushing in and out, and the various concepts suspected of speculation are flying all over the sky. This situation in which the market is in short supply often makes it easy for the entire industry to lose sight of it, and the indifference to battery safety will cause serious damage to the market. Don't look down on battery safety, the index is coming, Tesla, BYD E6, Zotye... Which electric car has not had a terrible safety accident?

The reality is to solve the problem of marketization of new energy vehicles. The power battery market that is supporting the power supply is now storming the “lifetime mileage” and “energy density”, and the safety guarantee of the power battery?

Huang Shilin, president of Ningde Times, believes that the current strength of domestic power batteries is uneven. Enterprises are scattered, the scale is not large, the threshold for access is low, due to lack of technology, corporate costs remain high and lack competitiveness. This situation will not last too long. If the products with certain hidden risks are brought to the market, the risk to the enterprise is very large, because unlike consumer electronics, the shelf life is only one and a half years, and the power battery must be kept for more than 8 years. Product performance and technical reliability. Not enough. If the product is broken in one or two years, it will need to be replaced or compensated. The enterprise risk will be very large.

How to achieve a good balance between "airship mileage", "energy density" and safety, the market has already approved some proven technology paths. Due to the safety of lithium iron phosphate battery and the low safety of ternary materials, China's previous technical route is to give priority to the development of lithium iron phosphate batteries. After the market has a certain degree of acceptance for electric vehicles, the development of ternary material batteries . Therefore, domestic related companies started late in research and development of high-nickel ternary materials, and the technology maturity was relatively low. At present, the ternary material battery vehicles that can be mass-produced are extremely limited. It can be said that it takes a three-year period to achieve a battery energy density span of 140Wh/kg to 350Wh/kg, which is a big challenge for the entire industry.

Huang Shilin said: "In terms of materials, the Ningde era chose to gradually evolve from lithium iron phosphate / graphite, ternary / graphite, high nickel ternary / silicon carbon to solid lithium air metal, which is the mainstream technology development route. In the process, we continue to do a good job of safety, increase energy density, improve cycle life, and reduce costs. This is something that our ternary materials will mainly be used for mainstream products and technologies in passenger cars in the future. Iron lithium, we will gradually increase its energy density, and will be mainly applied to buses and energy storage in the future. We will vigorously improve the cycle life and service life of the lithium iron phosphate battery, and hope that the battery we can make can be done. 15,000 cycles, more than 20 years of use. We believe that this technology and products will form a mainstream product in the future."

In contrast, BYD, the world's largest-selling new energy vehicle manufacturer, has an energy density of up to 140 Wh/kg. If a BYD electric car needs to have a cruising range of 400 kilometers, using lithium iron phosphate material, it is necessary to install a 600 kg battery. In contrast, the use of Tesla's ternary material battery is about 400 kg. The low energy density of the battery brings a contradiction that is difficult to reconcile - in order to pursue a longer cruising range, it is necessary to install more batteries, and more batteries are added, which will increase the weight of the vehicle, increase the power consumption during driving, and increase the cost of use. . According to the Ministry of Industry and Information Technology's "Guiding Opinions on Promoting the Development of Automotive Power Battery Industry", by 2020, the power battery has a specific energy of 350Wh/kg, while the current energy of most power batteries in China is about 140Wh/kg. The specific energy of the power battery used is about 230Wh/kg. If China can achieve the goal of 350Wh/kg in 2020, it will have an extraordinary significance for China's new energy automobile industry.

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