Lithium iron phosphate battery voltage range
Generally, the upper limit voltage of lithium iron phosphate battery is 3.7~4V, and the lower limit voltage of discharge is 2~2.5V. Considering the five aspects of discharge capacity, discharge median voltage, charging time, constant current capacity percentage and safety, constant current and constant voltage are adopted. The charging scheme, for the lithium iron phosphate battery, the charging limit voltage is set at 3.55 ~ 3.70V, the recommended value is 3.60 ~ 3.65V, the discharge lower limit voltage is 2.2V ~ 2.5V.
The lithium iron phosphate battery has a 3.6V charging limit, which is designed to fully activate the battery capacity to the maximum without damaging the battery. The number of times of charging refers to the number of times of full charge and discharge cycles. Although the design of 3.4V is not overcharged, there will be a small part that does not participate in the cycle charge and discharge, and most of the participation will increase due to the number of cycles to a certain number of times. Poor, vicious circle until unusable. This is the limitation of its life, the superposition of various inevitable harmful unfavorable factors, and the inability to maintain the original design parameters.
The charging voltage of lithium iron phosphate battery should be set at 3.65v, the nominal voltage is 3.2v, the general charging maximum voltage can be higher than 20% of the nominal voltage, but the voltage is too high, it is easy to damage the battery, 3.6v voltage is lower than this indicator, Not overcharged.
Although the lithium iron phosphate battery has a design-limited voltage, it is also equipped with a protective plate to protect the lithium battery from overcharging. But to make the life of lithium batteries longer, the correct charging method is also very important.