Lithium iron phosphate battery pack charging voltage should be set at 3.65V, the nominal voltage of 3.2V, generally charging the maximum voltage can be higher than the nominal voltage of 20%, but the voltage is too high and easy to damage the battery, the 3.6V voltage is lower than this indicator, there is no overcharge. Battery if you set a minimum of 3.0V to be charged, then 3.4V than the minimum high 0.4V, 3.6 than the minimum high 0.6V, more than 0.2V can release half of the power, that is to say, each charge, more than 3.4V than half of the use of time, due to the number of times the battery must be used so that the life of the new half, so in the absence of damage to the battery, the new charging voltage, the battery will be added! Life expectancy.
Lithium iron phosphate battery pack design 3.6V charging limit must be from the lithium-ion battery practical use, both can completely activate the battery capacity to the maximum, without damaging the battery, the number of charge refers to a number of times fully charged and discharged the number of cycles, the design of the 3.4V is not overcharged Judaism, but a small portion of the not participate in the cycle of charging and discharging, and most of the participation will be due to the number of cycles added to a certain number of times, it will continue to deteriorate, the vicious circle until it can not be used. Vicious cycle until it can not be used. This is the limitations of its life, a variety of unavoidable harmful factors overlap, the performance can not maintain the original design parameters of the inevitable.
What are the methods of charging lithium iron phosphate battery packs?
(1) Constant voltage charging method: During the charging process, the output voltage of the charging power supply is kept constant. With the changes in the state of charge of the lithium battery, automatically adjust the charging current, if the specified voltage constant value is appropriate, it can ensure the complete charging of the lithium iron ion battery pack, but also minimise the precipitation of gas and water loss.
(2) Constant current charging method: During the whole charging process, the charging current is kept constant by adjusting the output voltage. Keeping the charging current constant, the charging rate is relatively low. Constant current charging control method is simple, but due to the lithium iron phosphate battery pack's ability to accept current is gradually declining with the charging process, to the late charging stage, the power lithium batteries powered by the ability to decline, charging current utilisation rate is greatly reduced.
(3) Constant-current and constant-voltage charging method: the first stage adopts the constant-current charging method, which prevents the charging current from being too large at the beginning of constant-voltage charging. The second stage adopts constant voltage charging method, preventing the phenomenon of overcharging caused by constant current charging. Lithium iron phosphate battery pack and any other sealed rechargeable batteries, to control the charging, not indiscriminate charging, otherwise it is easy to damage the battery. Lithium iron phosphate battery packs generally use the first constant current and then voltage-limited charging method.
Post time: Aug-19-2024