Introduction to the advantages and disadvantages of current mainstream electric vehicle batteries

Lithium iron phosphate battery Lithium iron phosphate battery refers to a lithium ion battery that uses lithium iron phosphate as a positive electrode material. The cathode materials of lithium-ion batteries are mainly lithium cobalt oxide, lithium manganate, lithium nickelate, ternary materials, lithium iron phosphate and so on. Among them, lithium cobalt oxide is currently the cathode material used in most lithium-ion batteries. Advantages: high safety performance, long service life, good high temperature performance, large capacity, no memory effect, light weight, and environmental protection. Disadvantages: The tap density and compaction density are very low, resulting in lower energy density of lithium-ion batteries; material preparation costs and battery manufacturing costs are higher, battery yield is low, and consistency is poor. Application models: BYD Tang, Tengshi Electric Vehicle, Dongfeng Fengshen E30, JAC Heyue iEV4, General Sail Springo, Changan Yidong Pure Electric, Roewe 550Plug-in, etc. Lithium ion battery Lithium ion battery is a kind of battery that uses lithium metal or lithium alloy as negative electrode material and uses non-aqueous electrolyte solution. The earliest lithium ion battery came from the great inventor Edison, using the following reaction: Li+MnO2u003dLiMnO2 This reaction is a redox reaction, discharge. Advantages: high energy density, long service life, light weight, strong high and low temperature adaptability, green environmental protection, high rated voltage, high power endurance, low self-discharge rate, and basically no water consumption in production. Now it has become Mainstream vehicle batteries for electric vehicles. Disadvantages: poor safety, incapable of large current discharge, expensive, high production requirements, high cost, limited use conditions, high and low temperature use is dangerous. Application models: Ford Focus EV, Ford C-MAXEnergi, Toyota Prius, Mitsubishi iMiEV, Nissan Leaf, Tesla ModelS, etc. Iron batteries currently researched at home and abroad include high-speed iron and lithium iron. No manufacturer has claimed that their products can be put into practical use on a large scale. The high-speed iron battery is a synthetic stable ferrate (K2FeO4, BaFeO4, etc.) that can be used as the positive electrode material of the high-speed iron battery to produce a new type of chemical battery iron battery with high energy density, small size, light weight, long life, and pollution-free. Features: small size, light weight, long life, no pollution. Disadvantages: The process requirements for iron batteries are very high. If you can't grasp it, the battery will definitely have many small problems. In addition, the price of iron batteries is high. The cost of domestically produced 40Ah lithium iron phosphate batteries ranges from 30,000 to 40,000 yuan. If it is a 120Ah lithium iron phosphate battery pack, the market price is about 120,000 yuan. . Fuel Cell Fuel Cell is a power generation device that directly converts the chemical energy in fuel and oxidant into electrical energy. Fuel and air are fed into the fuel power cell separately, and electricity is magically produced. It looks like a battery with positive and negative poles and electrolytes from the outside, but in fact it cannot store electricity but is a power plant. Advantages: high energy conversion efficiency; flexible installation location; fast load response, high operating quality; strong overload capacity, etc. Disadvantages: The cost of fuel power cells is high, hydrocarbon fuels cannot be used directly, hydrogen storage technology is limited, and hydrogen fuel infrastructure is insufficient. Liquid battery Liquid battery consists of a battery composed of electrochemically active electrodes immersed in a glass container filled with electrolyte. Most batteries, including those used in laptop computers and TV remote controls, use solid materials such as zinc or cobalt lithium as the cathode, graphite as the anode, and liquid salt solutions as the electrolyte membrane. But this liquid battery is different, the yin and yang and the membrane are both liquid, and both are hot molten liquid like mud. Advantages: high energy density, stable and durable, faster charging speed, more environmentally friendly, and can maintain more than 14,000 cycles. Disadvantages: high cost. Sodium-sulfur battery The sodium-sulfur battery is a secondary battery with metallic sodium as the negative electrode, sulfur as the positive electrode, and ceramic tube as the electrolyte diaphragm. Under a certain degree of work, sodium ions permeate the reversible reaction between the electrolyte membrane and sulfur to form the release and storage of energy. Advantages: One is higher specific energy (that is, the effective electric energy per unit mass or unit volume of the battery), and the other is high current and high power discharge. Disadvantages: Its working temperature is 300-350℃, so it must be heated and kept warm when the battery is working. 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: How to quickly distinguish the quality of new and old lithium iron phosphate battery cells?