Explanation of the voltage of lithium iron phosphate battery and the voltage of lithium ion battery

The common 18650 battery voltage of lithium iron phosphate battery is divided into lithium ion battery and lithium iron phosphate battery. The nominal voltage of lithium-ion battery is 3.7v, the charging cut-off voltage is 4.2v, the nominal voltage of lithium iron phosphate battery is 3.2V, the charging cut-off voltage is 3.6v, the capacity is usually 1200mAh-3000mAh, and the common capacity is 2200mAh- 2600mAh. Why is the voltage of the lithium iron phosphate battery 3.2V? Lithium iron phosphate battery refers to a lithium ion battery that uses lithium iron phosphate as the positive electrode material. The positive materials of lithium-ion batteries mainly include lithium cobalt oxide, lithium manganate, lithium nickelate, ternary materials, lithium iron phosphate, and so on. Among them, lithium cobalt oxide is the cathode material used by most lithium-ion batteries today. The nominal voltage of the lithium iron phosphate battery is 3.2V, the high end charging voltage is 3.6V, and the low end discharge voltage is 2.0V. Due to differences in the quality and process of the positive and negative materials and electrolyte materials recovered by various manufacturers, there will be some differences in their functions. 3.2V is a lithium iron phosphate battery, which can be discharged with a large capacity. At the moment, all electric vehicles use this kind of battery. This kind of battery has a long life and is light in weight! Both 3.6V and 3.7V communicate with polymer lithium ion batteries. The upper limit of polymer lithium ion batteries is 4.2 and the lower limit is 2.6. The general standard is 3.7V. The charging voltage of the lithium iron phosphate battery should be set at 3.65V, and the nominal voltage is 3.2V. Generally, the maximum charging voltage can exceed 20% of the nominal voltage, but too high voltage can damage the battery. The 3.6V voltage is lower than this index. There is no overcharge. If the battery is set to be charged at the lowest 3.0V, then 3.4V is 0.4V higher than the lowest, 3.6V is 0.6V higher than the lowest. This 0.2V can release half of the electric energy, which means that every time it is charged, it is half more than 3.4V. Utilization time, due to the inevitable number of battery utilization, so that the life span is increased by half, so if the charging voltage is increased without damaging the battery, the battery life will be increased. The discharge platform of lithium iron phosphate battery is: 3.2V discharge range value: 2.5-3.65V, the highest charging value can be changed according to customer needs (shield parameter), generally the highest charging voltage is configured at 3.85V to 3.85 When V reaches the shielding voltage, the shielding board will automatically cut off the charging circuit to protect the battery. Lithium-ion battery voltage The discharge platform of a lithium-ion battery refers to the voltage change state of the battery when a fully charged lithium-ion battery is discharged. When the battery is constantly discharged, the battery voltage needs to experience three processes, namely, drop, unchanged, and then drop. Among these three processes, the stable schedule is the longest. The longer the constant time, the higher the discharge platform of the battery. The ups and downs of the discharge platform are closely related to the battery manufacturing process. It is because the market positioning of various lithium-ion battery manufacturers does not communicate, the skills and techniques are different, and their controlled discharge platforms do not communicate, and the quality is very different. Generally, a 18650 lithium-ion battery has a full voltage of 4.2V. When it is discharged to 3.7V with 1C of electricity, and it is left for 60 minutes, then we say that the battery's utilization capacity is 2200mAh. Nominal voltage, also known as rated voltage, refers to the voltage expressed by the battery in the course of normal work. The nominal voltage of lithium-ion batteries is generally 3.7V or 3.6V. According to the difference of the positive material of the lithium ion battery, the nominal voltage will be different. The nominal voltage of lithium cobalt oxide battery is 3.7V; the nominal voltage of lithium manganate battery is 3.8V; the nominal voltage of lithium nickel cobalt manganese ternary material is only 3.5-3.6V, but the formula is endless. The renovation and layout are complete. The nominal voltage of the lithium-ion battery of this material can reach 3.7V; the nominal voltage of the lithium iron phosphate battery is the lowest, only 3.2V, but the lithium-ion battery of this material is very safe and will not explode. The reincarnation function is very good and can reach 2000 weeks. 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: Do you know any details about the assembly essentials of lithium-ion battery electric vehicles?