New batteries let electric cars lose 'charging anxiety'

A new kind of battery can get rid of the charging anxiety of electric vehicles.Core tips: fast ion ring and super electronic network accelerate the charge. We use graphite anode materials, innovative use of channel optimization and fast ion ring technology to create a round high-speed channel surface of graphite , Lithium ions can be quickly inserted into graphite, which greatly increases the speed of lithium ion insertion into the graphite cathode. Moreover, the characteristics of modified graphite/super fast charging and high energy density can prevent negative by-products from appearing during the fast charging process, which affects the battery’s performance. Cycle and stability. Zheng said Xiaoyan. Charging anxiety and mileage anxiety are important obstacles to the large-scale industrialization of pure electric vehicles. At the 2019 World New Energy Vehicle Conference, a technology called high specific energy fast charging lithium-ion battery won the Global New Energy Vehicle Innovation Technology Award. This technology breaks through the technical bottleneck that the graphite system cannot be quickly charged. On the basis of maintaining the advantages of high energy density, high safety, long life, etc., 100% charging can be completed within 15 minutes, ensuring that the electric vehicle has a battery life of 300 kilometers. What is the secret of this technology? How can new energy users realize the fast charging of electric vehicles while experiencing the convenience of charging for 5 minutes and talking for 2 hours like mobile phones? At present, the industry’s fast charging methods are well known to all. For electric vehicles, the charge and discharge performance of the battery system is an important indicator that determines the actual use of the vehicle. High energy density and fast charging capabilities are the technological direction that power lithium battery manufacturers are constantly striving to develop, and they are also the core areas of new energy technology. Lithium-ion batteries are also called rocking chair batteries. Director Cheng Xiaoyan of Ningde Bei’s scientific research project, at New Energy Technology Co., Ltd. (hereinafter referred to as Ningde Bei), told Science and Technology Daily that the two poles of the rocking chair battery, while the lithium ion runs back and forth between the two ends of the rocking chair. When charging, lithium ions pass from the positive electrode of the battery through the electrolyte to the negative electrode. As the negative electrode, graphite has a sheet-like structure. Lithium ions are embedded in the graphite through the intermediate layer. The more lithium ions are inserted, the greater the charging capacity. A key indicator to measure the charging efficiency of electric vehicles is the charge-discharge ratio (C). The charge-discharge rate can be simply understood as the charge-discharge rate. The charge-discharge rate of a lithium-ion battery determines the speed at which we store a certain amount of energy in the battery, or the speed at which we release energy from the battery. For example, when a battery with a rated capacity of 100 amperes is charged at 20 amperes, its discharge rate is 0.2c, and the used capacity is discharged within 1 hour, which is called 1C discharge. Discharge after 5 hours is called 0.2c discharge. The industry generally believes that fast charging of electric vehicles refers to a charging method with a charging rate greater than 1.6c, that is, a technology that takes less than 30 minutes to charge from 0% to 80%. As the name implies, in order to shorten the charging time, the charging and discharging rate must be continuously increased. The core of fast charging technology is to accelerate the movement of lithium ions between the positive electrode and the negative electrode by optimizing the chemical system and design. However, in the development of fast charging technology, time considerations speed is not yet very mature. During rapid charging, lithium ions will accelerate into the cathode instantaneously. This poses a challenge to the cathode's ability to quickly extract lithium ions. In batteries of ordinary chemical systems, by-products such as lithium precipitation in the negative electrode during rapid charging, which affect the cycle and stability of the battery. Therefore, only the negative electrode material that can withstand fast charging and high current can realize fast charging. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Why is lithium-ion battery a milestone in the battery revolution?