Analysis of the characteristics of lithium batteries

Automotive lithium-ion power lithium-ion batteries are developed on the basis of disposable lithium batteries and are the primary direction for the development of pure electric vehicle batteries. Lithium batteries have the advantages of no recall, low self-discharge rate, environmental protection, high specific energy, and high specific power. It is the potential car battery that is most favored by research institutes and automakers after nickel-metal hydride batteries. Characteristics of Lithium Battery 1. Voltage Platform Due to the different data of the positive and negative electrodes, the working voltage of the single battery is planned to be 3.7~4v, and the working voltage of the proposed large-scale lithium iron phosphate single battery is 3.2v, which is nickel. Three times that of hydrogen batteries and twice that of lead-acid batteries. 2. The specific energy. At that time, the energy density of lithium-ion power lithium-ion batteries for passenger cars was close to 200 watt-hours/kg, and it is expected to reach 300 watt-hours/kg by 20203. Short battery life Due to the limitation of electrochemical data characteristics, the cycle number of lithium batteries has not been broken. Taking lithium iron phosphate as an example, the number of cycles of a single battery can reach more than 2000 times, and it can only reach more than 1000 times after grouping. 4. Great impact on the environment Lithium batteries use light metal lithium. Although it does not contain harmful heavy metals such as mercury and lead, it is considered a green battery and has less environmental pollution. But in fact, because its negative electrode material and electrolyte include nickel and metal, the situation of lithium batteries is now classified as including flammable, manganese, echo, leaching toxicity, corrosive, toxic, and harmful batteries, and now a variety of cells Including one of the most toxic substances, because the recycling technology is messy and leads to higher capital. Now the recycling rate is not high, and the impact of discarded batteries on the environment. 5. The capital is still high. The initial purchase cost of lithium batteries is very high. Taking the current mainstream automotive power lithium-ion battery products as an example, the price of lithium iron phosphate batteries is about 2500 yuan/KWH. With the popularity of electric vehicles, it is estimated that by 2020, the price of electric vehicles will fall below 1,000 yuan/kWh. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What are the advantages of fuel power batteries and general chemical batteries?