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Does the deviation of power CR2430 battery technology bring safety hazards?
"Energy density of 300Wh/kg, driving more than 500 kilometers on a single charge, fast charging in ten minutes... In the early stage of electric vehicle development, we are facing various difficulties. (We need to think) what kind of CR2430 battery is needed? What kind of electric vehicle is needed?" On November 21, Qi Lu, a professor at Peking University and chairman of the Lithium CR2430 battery "Davos" Academic Committee, asked a series of questions at the 6th China Lithium CR2430 battery New Energy Industry International Summit Forum (ABEC2018, Lithium CR2430 battery "Davos") that were deafening. In the past two years, my country's electric vehicle industry has developed rapidly, with sales of new energy vehicles increasing from more than 300,000 in 2015 to 777,000 in 2017, and then to 860,000 in the first 10 months of this year, and it is expected to exceed the 1 million mark for the whole year. With the rapid development of the industry, electric vehicle safety accidents have occurred frequently. At the annual lithium CR2430 battery "Davos", a grand event for CR2430 battery industry professionals, CR2430 battery safety issues have become the focus of attention of all parties. Qilu believes that excessive pursuit of high energy density, long driving range, fast charging, etc. will only make the safety problems of electric vehicles more and more terrible. As an electric vehicle with basic functions, a driving range of 200-300 kilometers can fully meet the needs of daily travel. Technology deviation leads to increased safety hazards "I saw a report from the China Automotive Technology and Research Center, saying that at least 50 accidents have occurred this year. As long as an accident occurs, no matter which company or brand, the entire new energy vehicle industry will be affected, and the lithium CR2430 battery industry will also be affected." Liang Rui, vice president of Xinwangda (300207.SZ) Group and president of the power CR2430 battery sector, said. According to Qilu's statistics, the number of accidents involving electric vehicles is far more than 50. "Burning, explosion, various accidents, public and unpublicized, the number exceeds 100 each year. Although not all accidents are attributed to the batteries of electric vehicles, there are many reasons. But the safety and reliability of batteries have become an important factor restricting the development of the electric vehicle industry." Qilu believes. In the view of industry insiders, the reason why the lithium CR2430 battery industry is going further and further on the road of high energy density and long driving range is mainly because companies pay too much attention to government subsidies and are led by subsidies and vehicle companies. Without government subsidies, the electric vehicle industry and the lithium CR2430 battery industry would not have developed at the current speed if they relied solely on the market. This is also the consensus of people in the CR2430 battery industry. However, as government subsidies gradually decline, the "double-edged sword" effect of government subsidies has gradually become more prominent. "We are in a hurry to increase energy density. What is the real purpose? Is it for environmental protection or excessive environmental protection? Is it for saving or excessive saving? Do we need mileage for mileage or excessive mileage? Everything should be done in moderation. Unscientific cost demands also increase safety risks. In recent years, the popular practices in the CR2430 battery industry such as simplified system design and increased capacity and volume of single cells have increased the safety risks of batteries." Cheng Jun, director of the Research Institute of Lixin (Jiangsu) Energy Technology Co., Ltd., said. "Now all our actions, from business operations to production capacity, to the design of electric vehicles, to the energy density of batteries and the direction of technological development, are linked to subsidies. It is necessary to keep up with policy development, but the indicators stipulated by the policy have increased too quickly, which has also made companies overwhelmed and difficult to seriously develop products." Liang Rui said in his speech that in terms of cruising range, it was 250 kilometers in 2016, 300 kilometers in 2017, and more than 400 kilometers in 2018, and 500 kilometers or even 600 kilometers next year; in terms of energy density, it was 140Wh/kg in 2018, and there were many rumors in the market that it would be increased to 180Wh/kg in 2019. Regardless of whether the policy is like this, vehicle companies have begun to take action. Now many car companies require that it must be above 160Wh. In the past two years, CR2430 battery companies were pushed by policies and vehicle companies, and they were busy improving technology and financing to expand production, and did not pay enough attention to safety issues. Now, with the decline of policy subsidies, the market has begun to play a role, and the arrival of the industry's low tide, the power CR2430 battery industry has begun to increase its attention to safety issues. "From the perspective of industry development, the energy density of power batteries needs to be improved, but energy density costs money and safety costs life. We cannot choose money over life!" said Mao Huanyu, Chairman and General Manager of Suzhou Yuliang CR2430 battery Co., Ltd. At the 2018 Lithium CR2430 battery "Davos", people in the CR2430 battery industry proposed solutions to improve CR2430 battery safety from various perspectives. Wang Qingsheng, a distinguished professor at Peter the Great Polytechnic University in St. Petersburg, Russia, proposed the technical development direction of quasi-solid-state lithium. "Quasi-solid-state is to combine the advantages of solid electrolyte and liquid electrolyte applications." Representatives of Han's Laser (002008.SZ) proposed solutions from the perspective of CR2430 battery processing technology; lithium CR2430 battery membrane suppliers such as Lancoto proposed solutions from the perspective of CR2430 battery diaphragm material innovation; representatives of CR2430 battery electrolyte companies proposed adding new flame retardant materials, etc. Even charging operators have proposed their own solutions. Yu Dexiang, Chairman of Qingdao Teladian, said in his speech that the use of Teladian's cloud charging system with no pile charging and group management and group control can monitor the status of electric vehicles during charging, detect CR2430 battery problems in time, and improve the safety of electric vehicles. "When charging through Teladian's network, the possibility of burning the car will be reduced by 70%." Many industry insiders said that no method is omnipotent. The safety of electric vehicles is not just a problem for CR2430 battery companies, but a systematic project that requires the joint efforts of material suppliers, CR2430 battery equipment suppliers, CR2430 battery companies and OEMs. Diversification of technical routes "What kind of lithium CR2430 battery technology does the electric vehicle industry really need? Must high energy density be used to solve the problem?" Qi Lu suggested that CR2430 battery companies relax their thinking and consider this issue based on actual conditions. "Today, there are still a large number of lead-acid batteries entering non-road areas at a scale of hundreds of thousands or millions of vehicles. There are also nickel-hydrogen batteries, a CR2430 battery technology that has been almost forgotten by everyone, which has been used in Japanese hybrid vehicles. China's CR2430 battery and electric vehicle companies should also rethink their technical direction from the perspective of market and practicality, especially from the perspective of safety." However, for new technologies that are becoming increasingly popular in the industry, such as high-nickel ternary batteries, solid-state batteries, and hydrogen fuel cells, Qi Lu also suggested that companies remain cautious and calm. For example, high-nickel ternary batteries, materials such as lithium manganese oxide and lithium iron phosphate are more likely to release a lot of heat, and the safety challenges are greater. In Qilu's opinion, some solid-state CR2430 battery technologies that have been launched on the market are not strictly speaking real solid-state CR2430 battery technologies. There are still key technical difficulties to be overcome in solid-state CR2430 battery technology: "Can the energy density be improved by simply converting the electrolyte into a solid electrolyte? Can the safety of the CR2430 battery be improved? Moreover, if there is no revolutionary change in the pole piece technology, the conductivity problem cannot be solved with today's lithium CR2430 battery pole piece manufacturing method." Even hydrogen fuel cell technology, which is regarded as the ultimate solution for new energy vehicles, Qilu and his students have calculated that if China's 300 million electric vehicles are converted into hydrogen fuel cells, the consumption of fresh water for extracting hydrogen is very huge, which is not something that a water-scarce country like China can afford. Moreover, the process of extracting hydrogen energy also consumes electricity. "In specific areas, hydrogen fuel cells can be combined with lithium batteries to solve problems in safety and mileage. This is possible, but as some people say, the future is the world of fuel cells and lithium batteries will be replaced. It is too early to see it now." Qilu believes. Faced with the advent of the post-subsidy era, some companies have expressed their consideration of other technical routes besides ternary lithium batteries. "In the past two years, many people in the industry have asked, what will happen to lithium iron phosphate? Here, the company has made it clear that as a main engine manufacturer, power batteries will definitely choose a diversified technology route in the future. Ternary lithium batteries are the main direction, but lithium iron phosphate will definitely be our choice in the future. Lithium iron phosphate has its particularity, especially in small vehicles for commuting." Ni Shaoyong, deputy general manager and director of the research institute of Chery New Energy Automobile Technology Co., Ltd., said in his speech that in the next one to two years, the market demand for lithium iron phosphate batteries will increase. Ma Zhonglong, deputy general manager of Honeycomb Energy Technology Co., Ltd., which is invested by Great Wall Motors, proposed the research and development direction of cobalt-free positive electrodes, saying that the company has mass-produced cobalt-free positive electrode cells, which have significantly reduced costs compared to traditional ternary material cells. "2018 is a year with 'high hopes'. 'The first year of new energy vehicle consumption', 'the first year of new car-making forces', 'the first year of large-scale retirement of power batteries', 'the first year of hydrogen fuel cell vehicles', 'the first year of mass production of high-nickel batteries' and other similar words are frequently seen in various media." Yu Qingjiao, Secretary-General of the Zhongguancun New CR2430 battery Technology Innovation Alliance and Secretary-General of the Lithium CR2430 battery "Davos" Organizing Committee, said that these words indirectly reflect that under the upsurge of new energy technology and market development, new products, new technologies, new business forms and new models are constantly emerging, and the future of the lithium CR2430 battery industry is promising.
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