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Energy density 304Wh/kg! Breakthrough in battery technology in Ningde era

2024-04-17 Update From: AutoBeta autobeta NAV: AutoBeta > News >

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At present, the new energy vehicles on the market are mainly electric vehicles, and battery life is a major wound of electric vehicles, the root of the problem is that the energy density of power batteries used in electric vehicles has not been developed for a long time. Now there is good news from Ningde era, the company has developed a sample of battery mass energy density up to 304Wh/kg.

According to the latest news from Ningde Times, the company's R & D team conquered the key core technologies such as positive and negative materials of power batteries and developed samples with specific energy (mass energy density) up to 304Wh/kg, which is in a leading position in the international market.

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Industry analysts believe that the current Ningde era of technological breakthroughs have been experimental success, as the related technology gradually entered the market-oriented application stage, will significantly enhance the core competitiveness of domestic power batteries.

Lithium battery includes many key parts, such as positive electrode, negative electrode, electrolyte and so on. Positive and negative electrodes are the places where chemical reactions take place. At present, the energy density of negative electrode materials is much greater than that of positive electrodes. This time, the cathode materials of Ningde era adopted high performance and high nickel, which solved the shortcomings of low energy density of cathode materials, and relying on the National Engineering Research Center, through collaborative development with the upstream and downstream units of the industrial chain. The large-scale production and application of domestic high nickel materials have been realized step by step.

In addition to cathode materials, Ningde era also aimed at the hard wounds of anode materials, using silicon-based anode materials to replace graphite, which is widely used in the market at present. Traditional silicon-based materials mainly use carbon coating technology. After many cycles, the carbon material will be broken and fall off, resulting in poor battery cycle performance, while the Ningde era turned to the study of artificial electrolyte interface film coating technology. It took two years to develop a new type of silicon-carbon composite anode material coated with artificial electrolyte interface film with independent intellectual property rights, which improved the cycle stability.

Now the energy density of the ternary soft bag battery loaded for Nissan Xuanyi pure electric vehicle in Ningde era is about 200Wh/kg, the energy density of the system is 123.78wh/kg, and the energy density of its ternary square cell is 240Wh/kg. Ningde era also plans to reach 270Wh/kg in 2019, and increase the energy density of the cell to 300Wh/kg by 2020.

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At present, in the industry, the battery energy density that can achieve mass production is mostly up and down the 250Wh/kg, and the "medium-and long-term Development Plan of the Automotive Industry" released by the Ministry of Industry and Information Technology also clearly requires that the energy density of the power battery unit should reach 300Wh/kg in 2020, but many people are not optimistic about this goal of the country. Now Ningde era has developed samples with energy density up to 304Wh/kg, which gives people hope again.

Ningde Times, referred to as CATL, was established in 2011 and listed on the Shenzhen Stock Exchange on June 11, 2018. It can be said that China's new energy policy contributed to the "unicorn" Ningde era, with operating income of 19.997 billion yuan in 2017, an increase of more than 34% over the same period last year, and net profit of 3.972 billion yuan, an increase of 31.4% over the same period last year. In 2018, total revenue reached 29.611 billion yuan, an increase of 48.08% over the same period last year. Net profit belonging to shareholders of listed companies was 3.579 billion yuan, down 7.71% from the same period last year. At present, Ningde era has provided batteries to BMW, BAIC New Energy, Geely Automobile, Changan Automobile, Dongfeng Automobile and other car companies, and has also established a joint venture with SAIC.

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