Precautions for fast charging of lithium-ion batteries
The initial charging current should not be too high to avoid overheating of the battery, which could lead to leakage or explosion.
When the battery terminal voltage reaches 4.20V, it must be switched to constant voltage immediately. This voltage requirement is high (error <0.5%) and must be measured with a multimeter of 4.5 digits or higher.
Charge according to the standard time and procedure, even for the first three times: first plug the charger into the power source, and then plug the charger's output end into the phone's charging port;
When your phone displays a low battery warning, you should start charging it as soon as possible; lithium-ion batteries are most easily damaged when over-discharged.
Lithium-ion batteries do not require any special activation method; they will activate naturally during normal use of the phone.
A lithium-ion battery charger is a charger specifically designed to charge lithium-ion batteries. Lithium-ion batteries place high demands on chargers, requiring protection circuits. Therefore, lithium-ion battery chargers typically have high control precision, enabling constant current and constant voltage charging of lithium-ion batteries. Lithium-ion battery chargers are widely used in power supplies for portable electronic instruments such as special-purpose vehicles, scientific research, resource exploration, medical instruments, ultrasonic flaw detectors, video cameras, digital communications, digital electronics, solar power plants, walkie-talkies, and personal computers. Lithium-ion battery chargers, when connected to an external current-limiting charging power supply and a P-channel MOSFET, can safely and effectively fast charge a single lithium-ion battery. Their biggest advantage is achieving very low power dissipation without using an inductor. To meet the demand for more precise and safer chargers for low-power portable products, many IC manufacturers have developed low-cost linear chargers. The LD6275 constitutes a stand-alone linear charger circuit requiring only a few external components, capable of charging a maximum battery capacity of 1.5A. The LD6275 is a highly integrated lithium-ion battery linear charger IC with active power path management. It adjusts the battery charging current in real time when the load current is loaded/unloaded, effectively monitors and manages the input current, and meets the surge current limiting and soft activation requirements specified by USB-IF.
