1, constant current charging, that is, the current is certain, and the lithium iron phosphate battery voltage gradually increases with the charging process, according to the above specifications generally with 0.2C current charging, when the battery voltage is close to the full voltage 4.2V, change the constant current charging to constant voltage charging. The process takes about five hours.
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2, constant voltage charging, that is, the voltage is certain, and the current gradually decreases with the saturation degree of the cell, according to the specification, when the current is reduced to 0.01C, that is, 10mA, it is considered that the charge is terminated. After this process and the constant current charging time are added up, the total charging time should not exceed eight hours.
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3, lithium iron phosphate battery charging temperature is best within 0-45℃, such a temperature is more conducive to the lithium ion battery chemical activity, making the charging efficiency is higher.
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4. For the charger of lithium iron phosphate battery pack, it is best to use the special charger equipped by the manufacturer. Do not use other chargers of other models or charging voltage is not suitable.
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5. After the lithium iron phosphate battery is charged, try to prevent it from being placed on the charger for more than 10 hours, if it is not used for a long time, the mobile phone and the lithium ion battery should be separated.
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6, the charger can only protect the entire battery pack terminal voltage, the balance of the charging board is to ensure that each single overcharge and each single is full, can not stop the entire lithium iron phosphate battery pack charging because there is a cell full.
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7, iron phosphate lithium ion battery to get the hand want to formally use, it is necessary to charge, because lithium-ion battery storage power can not be too full, too full will make its capacity loss.
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The charge of lithium iron phosphate battery is recommended to use CCCV charging mode, that is, constant current before constant voltage. Constant current 0.3C is recommended. The recommended constant voltage is 3.65. that is, 0.3C current charge during the constant current process. When the battery voltage reaches 3.65V, 3.65V voltage constant voltage charge is adopted. When you charge with a balanced voltage power supply, you also need to look at the charging current, it is recommended not to charge with too high a voltage, adjust the voltage to ensure that the charging current is below 0.5C, which is good for the battery.
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General lithium iron phosphate battery charging upper voltage 3.7~4V, discharge lower voltage 2~2.5V, comprehensive consideration of discharge capacity, discharge median voltage, charging time, constant current capacity percentage, safety of these 5 aspects, the use of constant current constant voltage charging scheme, for lithium iron phosphate battery, charging limit voltage set at 3.55 ~ 3.70V is more reasonable. The recommended value is 3.60 ~ 3.65V, and the lower discharge voltage is 2.2V~2.5V.