3.65V
This maximum charging value can be changed according to customer needs
Generally, the maximum charging voltage is set at 3, 6V
When it reaches 3.6V, it reaches the protection voltage, and the protection board automatically cuts off the charging circuit to protect the battery.
Detailed information:
The working principle of lithium iron phosphate battery ( LiFePO4)
The internal structure of LiFePO4 battery: on the left is LiFePO4 with olivine structure as the positive electrode of the battery, which is connected to the positive electrode of the battery by a sheet of aluminum. polymer separator, which separates the positive electrode from the negative electrode, but the lithium ion Li+ can pass but the e- electron cannot pass. On the right is the negative electrode of the battery made of carbon (graphite), which is connected to the. electnegative rode of the battery by copper foil. Between the upper and lower ends of the battery is the battery electrolyte, and the battery is sealed by a metal casing.
When the LiFePO4 battery is charging, the lithium Li+ ions from the positive electrode migrate to the negative electrode through the polymer separator; during the discharge process, lithium Li+ ions from the negative electrode migrate to the positive electrode; through the separator. Lithium-ion batteries get their name because lithium ions migrate back and forth during charging and discharging.
Main performance of LiFePO4 battery
The rated voltage of LiFePO4 battery is 3.2V, the charging termination voltage is 3.6V, and the voltage of termination is 2.0V. Due to the different quality and process of positive and negative electrode materials and electrolytic materials used bydifferent manufacturers, there will be some differences in their performance. For example, the same model (standard battery in the same package) has a big difference in battery capacity (10% to 20%).
Baidu Encyclopedia-Lithium Iron Battery
Baidu Encyclopedia-Phosphate iron and lithium Battery