One article knows the classification of power lithium batteries

Three minutes to know the classification of dynamic lithium batteries. Three minutes to know the classification of dynamic lithium batteries. New energy vehicle power lithium-ion batteries can be divided into fuel power batteries and secondary batteries (including lead-acid batteries, lithium batteries, nickel-hydrogen batteries, nickel-cadmium batteries). The working principle of lithium batteries Lithium batteries are generally divided into the following two categories according to the usage data of the positive and negative electrodes: metal lithium batteries are unstable and cannot be recharged, and are not secondary batteries. Regarding new energy vehicles, what we usually call lithium batteries refers to lithium batteries. The lithium metal battery uses manganese dioxide as the positive electrode data, and lithium metal or its alloy metal as the negative electrode data battery; the lithium battery uses the lithium alloy metal oxide as the positive electrode data, and graphite is the negative electrode data battery. The working principle of lithium batteries: Lithium batteries are mainly composed of four parts: positive electrode (compound containing lithium), negative electrode (carbon data), electrolyte and separator: when the battery is charged, the lithium atoms on the positive electrode are ionized into lithium ions and electrons (de-intercalation) ). Lithium ions move to the negative electrode through the electrolyte and obtain electrons. The electrons are reduced to lithium atoms and inserted into the micropores of the carbon layer (penetration). When the battery is discharged, the lithium atoms inserted into the carbon layer of the negative electrode lose electrons (delamination) and become lithium ions. After passing through the electrolyte, they return to the positive electrode (embedded). The charging and discharging process of lithium batteries, that is, the process of continuous insertion and stripping of lithium ions between the positive electrode and the negative electrode, is accompanied by the insertion and stripping of equivalent electrons. The more lithium ions, the stronger the charge and discharge capacity. Classification Due to the difference in positive electrode data, lithium batteries are mainly divided into lithium iron phosphate (LFP), lithium nickel oxide (LNO), lithium manganese oxide (LMO), lithium cobalt oxide (LCO), lithium NCM (NCM), and nickel nickel aluminate Lithium (NCA). The comparison of the types of chemical composition, structure and important functions is as follows: As can be seen from the above table, different types of lithium batteries have different application markets. As a pioneer of lithium batteries, lithium cobalt oxide can also be used as a power lithium ion battery to test water. It was originally used in Tesla Roadsters. However, due to its low cycle life and safety, it has proven to be unsuitable for power lithium-ion batteries. To compensate for this, Tesla uses what it calls the world's most advanced battery processing system to ensure battery stability. Lithium cobalt oxide is now an important part of the 3C market. Lithium manganese oxide batteries were originally developed by the battery company AESC, a joint venture between Nissan and NEC. The representative model of lithium manganese oxide is Nissan leaf, because of its low price, medium energy density, general safety and so-called good generalization function. It is also because of this tepid nature that it is gradually being replaced by new skills. As an important product of BYD, lithium iron phosphate has good stability, long lifespan and financial advantages. It is especially suitable for plug-in hybrid vehicles with frequent charging and discharging, but its disadvantage is the general energy density. As a rising star, the ternary lithium battery has the highest energy density, but its safety is relatively poor. There are pure electric vehicles that need to extend their range, and their vision is broader, which is the mainstream direction of current power lithium-ion batteries. 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 article: Design of a new type of lithium battery management system