Charging and discharging characteristics of lithium iron phosphate battery pack:
Lithium battery packs have high energy density and high average output voltage. Self-discharge is small, below 10% per month. There is no memory effect. The wide operating temperature range is -20℃～60℃. Excellent cycle performance, fast charging and discharging, charging efficiency up to 100%, and high output power. It has a long service life and is called a green battery. The charging process of lithium iron phosphate battery is divided into two stages: constant current fast charging stage and constant voltage current decreasing stage.
In the constant current fast charge stage, the battery voltage gradually rises to the battery standard voltage, and then switches to the constant voltage stage under the control chip. The voltage does not rise to ensure that it will not overcharge, and the current gradually decreases as the battery power rises. To 0, and finally complete charging. The power statistics chip can sample and calculate the battery power by recording the discharge curve. After repeated use of lithium batteries, the discharge curve will change. Although lithium ion batteries have no memory effect, improper charging will seriously affect battery performance.
Over-discharge of lithium iron phosphate battery causes the negative carbon sheet structure to collapse, and the collapse will cause the lithium ions to be unable to be inserted during the charging process; over-charging causes too much lithium ions to be embedded in the negative carbon structure, and some of the lithium ions can no longer be released come out. Lithium battery discharge time is related to battery capacity and discharge current. When the battery is discharged = battery capacity/discharge current. Lithium battery discharge current should not exceed 3 times the battery capacity, otherwise the battery will be damaged.
How to charge and discharge lithium batteries correctly?
1. Charge according to the standard time and procedure, even the first three times;
2. When the battery is too low, try to start charging as soon as possible;
3. The activation of the lithium iron phosphate battery does not require special methods, and the lithium battery will naturally activate during normal use. If you insist on using the popular "first three 12-hour long charge activation" method, it won't actually work.
