Solid-state battery or new energy vehicle core research project

Time:2019-10-29
With the rapid growth of new energy vehicle ownership, new energy vehicle safety accidents have gradually increased, especially with new energy vehicles. Because existing lithium batteries contain flammable liquid electrolytes, it is difficult to fundamentally solve this problem. The solid-state battery uses a solid electrolyte with ion conductivity to replace the electrolyte in whole or in part, which is beneficial to improve the safety performance of the battery. At the same time, from the perspective of improving battery performance, solid-state batteries have great potential compared to existing liquid lithium batteries. Academician Ouyang Minggao of the Chinese Academy of Sciences said that based on the comparison of power battery technology routes in various countries, lithium-ion batteries with liquid electrolyte in the short term will be developed in the next step. Considering the battery cost and the development direction of the power battery, Ouyang Minggao suggested that China should follow a similar path, that is, short-term liquid electrolyte, development of high-nickel ternary positive electrode and silicon-carbon negative electrode; medium and long-term, gradual transition from liquid electrolyte to All solid state battery.
Enterprises have paid close attention to solid-state batteries
Solid-state batteries are expected to crack consumers‘ "safety anxiety, endurance anxiety, and charging anxiety" for electric vehicles, and have always attracted great attention from car companies. In addition, European and American car companies also hope to take the lead in mastering solid-state battery technology and regain the initiative in the power battery segment. At present, Volkswagen, Daimler, BMW, Renault, Toyota, Nissan, Honda, Hyundai, Ford and other international car companies, BYD, Wei Lai, Skyline, Hezhong, Beiqi and other domestic car companies have invested in the field of solid-state batteries.
In terms of battery companies, Ningde era, BYD, Yanfeng Lithium, Beijing Weilan, Qingtao Energy, Lishen Battery, Huineng Technology, Guoxuan Hi-Tech, Yiwei Lithium, Weiwei and other domestic companies have always had solid-state batteries. Research and development. Major foreign companies in some industries are also stepping up their layout. In January this year, Toyota and Panasonic announced that they will set up a joint venture for automotive square batteries by the end of 2020, responsible for the development and production of all-solid-state batteries and square lithium batteries for vehicles; 2018 In November, Samsung SDI, LG Chem and SKI agreed to jointly develop core battery technology. In addition, the three companies will set up a fund of 100 billion won (about 90 million US dollars) to jointly invest in technology research and development of solid-state batteries, lithium metal batteries and lithium-sulfur batteries.
Improve the development system of power battery industry
According to the "Planning" of the network, we strive to make a major breakthrough in the core technology of China‘s new energy vehicles after 15 years of continuous efforts. Pure electric vehicles have become the mainstream, and fuel cell commercial vehicles have achieved large-scale applications. By 2030, new energy vehicles will have a competitive advantage in the market, with sales accounting for 40% of total car sales that year. At that time, the formation of pure electric vehicles, plug-in hybrid vehicles, fuel cell vehicles as a "three vertical" pattern, layout of the vehicle technology innovation chain; power battery and management systems, drive motors and power electronics, network and intelligent The technology is “three horizontals” and builds a technical supply system for key components.
In addition, the "Plan" also proposed to promote the development of the full value chain of power batteries. Specifically, optimize the industrial organization structure and increase the concentration of the industry. The production of power batteries requires lithium, nickel, cobalt and other metal resources. In order to ensure the stable supply of power batteries for electric vehicles and the long-term healthy development of the industry, there is an urgent need to stabilize or even lock upstream resources. The Plan encourages qualified enterprises to improve their key resource support capabilities such as lithium, nickel, cobalt and platinum.
With the expansion of electric vehicles, how to effectively recycle decommissioned batteries has become a difficult problem for the industry. According to the "Planning" of the network, it is necessary to improve the multi-level and multi-purpose recycling system of power batteries and encourage the construction of shared recycling channels. At the same time, establish and improve the management system of power battery transportation warehousing, maintenance, safety inspection, scrapping and exit, etc., and strengthen the supervision of the whole life cycle.
In addition, the “Planning” of the network also proposed to establish a sound modular system for power batteries, accelerate the breakthrough of key manufacturing equipment, and improve the process level and production efficiency.