How to charge lithium-ion battery? How to correctly charge the lithium battery? Lithium-ion battery charging is available in a variety of ways. With the correct charging method, the lithium-ion battery can be fully charged. If the charging method is not correct, the lithium-ion battery is not fully charged, but the lithium-ion battery capacity is reduced, the life is shortened, and overcharge is caused.
How to charge lithium-ion battery?
The charging process of a lithium-ion battery can be divided into four stages: trickle charging (low voltage pre-charging), constant current charging, constant voltage charging, and charging termination.
Phase 1: Trickle Charge - Trickle charge is used to precharge (recovery charge) the fully discharged battery unit.
Phase 2: Constant Current Charging—When the lithium ion battery voltage rises above the trickle charge threshold, the charging current is increased for constant current charging. The current for constant current charging is between 0.2C and 1.0C.
Phase 3: Constant Voltage Charging - When the battery voltage rises to 4.2V, the constant current charging ends and the constant voltage charging phase begins. The current is gradually reduced by the maximum value according to the saturation degree of the battery, and the charging current is terminated when it is reduced to 0.01C.
Phase 4: Charge Termination—There are two typical methods of terminating charge termination: use minimum charge current judgment or use a timer (or a combination of both). The minimum current method monitors the charging current during the constant voltage charging phase and terminates charging when the charging current is reduced to the range of 0.02C to 0.07C.
How to correctly charge the lithium battery?
1 Lithium battery does not need to be filled for 12 hours for the first charge. This is what old-fashioned NiMH batteries need to do. The batteries used in today's smartphones and laptops are mostly lithium-ion batteries or polymer lithium batteries. The first time you only need to charge in peacetime, the battery full indicator lights up.
2 From a safety point of view, do not cover anything on the lithium battery during charging, and do not put it on the bed to avoid fire. In addition, try not to answer the phone while charging, because the mobile phone in the charging, the electromagnetic radiation will be relatively large.
The 3 lithium battery does not require special methods to activate, and the lithium battery will naturally activate during the driving of the electric vehicle. Lithium batteries have no memory effect and do not require deliberate deep charge and discharge activation.
4 Avoid high temperature charging. Do not charge in an environment where the temperature exceeds 40°. The high temperature will degrade the battery capacity. Try to choose a cool and ventilated environment. Too much sultry environment is not conducive to the state of charge, but also damage the battery and reduce the life of the charger.
5 pairs of lithium battery packs should be installed as needed, avoiding the battery to be recharged after each undervoltage, which can greatly improve the battery life, so that the battery is in a shallow cycle, so that the battery life will be extended.
6 Please use the charger of the original or reputable brand. Lithium battery should use the special charger for lithium battery, and follow the instructions, otherwise it will damage the battery and even cause danger.