Brief analysis of the structure and working principle of lithium iron phosphate battery

The full name of lithium iron phosphate battery is lithium iron phosphate battery, the name is too long, referred to as lithium iron phosphate battery. Because its performance is particularly suitable for power applications, the word power was added to its name, that is, lithium iron phosphate power lithium-ion battery. Others call it a lithium-iron (life) power lithium-ion battery. Lithium iron phosphate battery refers to a lithium battery using lithium iron phosphate as the positive electrode material. Lithium battery cathode materials mainly include lithium cobalt acid, lithium manganese acid, lithium nickel acid, three materials, lithium iron phosphate and so on. Lithium cobalt oxide is the negative electrode material for most lithium batteries. Working principle The full name of the lithium iron phosphate battery is the lithium iron phosphate battery, the name is too long, and the lithium iron phosphate battery for short. Because its performance is particularly suitable for power applications, the word power was added to its name, that is, lithium iron phosphate power lithium-ion battery. Others call it a lithium-iron (life) power lithium-ion battery. Significance In the metal market, cobalt (Co) is the most expensive, with few stocks, nickel (Ni) and manganese (Mn) are cheaper, and iron (Fe) is the cheapest. The price of the cathode material is also consistent with the price of these metals. Therefore, lithium batteries made of LiFePO4 anode materials should be the cheapest. Another feature is that it does not pollute the environment. The requirements for rechargeable batteries are: high capacity, high output voltage, good charge and discharge cycle performance, stable output voltage, high current charge and discharge, electrochemical stability, safe use (not charged, discharge and short-circuit caused by improper operation, such as burning or Explosion), wide operating temperature range, non-toxic or less toxic, no pollution to the environment. The anode of lithium iron phosphate lithium iron phosphate battery is good for these performance requirements, especially in large discharge rate discharge (5~10c discharge), the discharge voltage is stable, safe, will not burn, will not explode, and life (cycle), It has no pollution to the environment, it is the best, and the best battery high current output power. Structure and working principle LiFePO4 is the positive electrode of the battery, which is connected to the positive electrode of the battery by aluminum foil. In the middle is a layer of polymer film, which separates the positive and negative electrodes, but lithium ions Li can pass, but electrons e- cannot. On the right is the negative electrode of the battery, which is made of carbon (graphite) and is connected to the negative electrode of the battery through copper foil. Between the upper and lower ends of the battery is the electrolyte of the battery, and the battery is enclosed in a metal casing. When the LiFePO4 battery is charged, the positive lithium ion Li migrates to the negative electrode through the polymer membrane. During the discharge process, lithium ions in the negative electrode migrate to the positive electrode through the separator. Lithium batteries are named after lithium ions move back and forth between charge and discharge. 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: Analysis of new methods for winter battery maintenance