The upper limit of the charging voltage of a single lithium iron phosphate battery of Pacific Automotive Network is 3.65V. Generally, the upper limit of charging voltage of the lithium iron phosphate battery is 3.7-4V and the lower discharge limit voltage is 2-2.5V. Lithium battery voltage is one of the important indicators to measure the discharge performance of lithium battery. Potential difference between the positive and negative electrodes of the lithium battery in a certain state.
The common 18650 battery with lithium iron phosphate battery voltage is divided into lithium ion battery and lithium iron phosphate battery. The rated voltage of lithium ion battery is 3.7V, the charging cutoff voltage is 4.2V, the rated voltage of lithium iron phosphate battery is 3.2V, the cutoff voltage charging is 3.6V, capacity is generally 1200mAh. 3000mAh, common capacity is 2200mAh-2600mAh.
Why is the lithium iron phosphate battery voltage 3.2V?
Lithium iron phosphate battery refers to a lithium ion battery using lithium iron phosphate as the positive electrode material. The cathode materials of lithium ion batteries mainly include lithium cobalt oxide, lithium manganate, lithium nickel oxide, ternary materials, lithium iron phosphate, etc. Among them, lithium cobalt oxide is the cathode material currently used in most lithium-ion batteries.
The rated voltage of the lithium iron phosphate battery is 3.2V, the high terminal charging voltage is 3.6V, and the low terminal discharge voltage is 2.0 V. Due to the different quality and process of positive and negative electrode materials and electrolytic materials used by different fabslaughing, there will be some differences in their performance.
3.2V is a lithium iron phosphate battery, which can discharge to a large capacity. This type of battery is now used in electric vehicles. This type of battery has a long lifespan and is lightweight! 3.6V and 3.7V are the same as lithium polymer batteries. The upper limit of lithium polymer 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 to 3.65V, and the rated voltage is 3.2V. Generally, the Maximum charging voltage can be 20% higher than rated voltage, but it is too high. Voltage can easily damage the battery. 3.6 V. If the voltage is below this indicator, it is not overloaded. If the battery is set to a minimum of 3.0 V, it should be charged. Then 3.4V is 0.4V higher thanlower, and 3.6 is 0.6V higher than the lowest. The extra 0.2V can free up half the power. which means that each charge is twice as much as 3.4V. Usage time Since the battery is used a certain number of times, the lifespan is increased by half. Therefore, increasing the charging voltage without damaging the battery will increase its lifespan.
The discharge platform of lithium iron phosphate battery is: 3.2V. The discharge range value is: 2.5-3.65V. This maximum charging value can be changed according to customer needs (protection card parameters). It is the maximum charging voltage set to 3.85V and reaches 3.85V, the protection voltage is reached and the protection board will automatically cut off the charging circuit to protect the battery.
Voltage of lithium-ion battery Lithium-ion battery discharge platform refersence to the battery voltage changing state when a fully charged lithium battery is discharged. When a battery is discharged at a constant current, the battery voltage goes through three processes: falling, stabilizing and falling here. Among the three processes, the stable period is the longest. The longer the stabilization time, the higher the battery discharge platform. The level of the discharge platform is closely related to the battery manufacturing process.
(Images/Text/Photos: Pacific Automotive Network Calling the Beast Q&A)