What is the important way to charge the lithium iron phosphate battery pack?

It is recommended to use the CCCV charging method for charging the lithium iron phosphate battery pack, that is, first constant current and then constant voltage. The recommended constant current is 0.3C. Constant voltage recommendation 3.65. That is, 0.3C current charge in the constant current process, when the battery voltage reaches 3.65V, use 3.65V voltage constant voltage charge, when the charging current is lower than 0.1C (or 0.05C), stop charging, that is, the battery is already full. When you charge with a constant voltage power supply, you also need to look at the charging current. It is recommended not to charge with a voltage that is too high. After adjusting the voltage, ensure that the charging current is below 0.5C, which is good for the battery. Generally, the upper limit voltage of lithium iron phosphate battery charge is 3.7~4V, and the lower limit voltage of discharge is 2~2.5V. Considering the five aspects of discharge capacity, median discharge voltage, charging time, constant current capacity percentage, and safety, constant current and constant voltage are adopted. For lithium iron phosphate battery packs, it is reasonable to set the charging limit voltage at 3.55～3.70V, the recommended value is 3.60～3.65V, and the lower limit voltage of discharge is 2.2V～2.5V. The charger of lithium iron phosphate battery pack is different from ordinary lithium battery. The highest termination charging voltage for lithium batteries is 4.2 volts; the lithium iron phosphate battery pack is 3.65 volts. When charging the lithium iron phosphate battery pack, it is connected to the balance charging board. Generally, it is directly charged in series from both ends. The voltage of the charger is greater than the voltage of the battery pack. The cable detection of the voltage of each single cell is equivalent to connecting a zener tube in parallel. The charging voltage of the single cell will not exceed the voltage stabilization value, while the other single cells continue to be charged through the zener tube bypass charging. Because the power of each cell is nearly full at this time, it is just balancing each cell, so the charging current is small, and each cell is fully charged to supplement the balance. The charger can only protect the terminal voltage of the entire battery pack. The balance charging board ensures that each cell is overcharged and each cell is fully charged. It cannot stop charging the entire lithium battery pack because one cell is fully charged. 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: What are the reasons for the safety factors of lithium batteries?