Method and principle of fast charging for mobile phone battery

fast Charging implementation: In addition to the usual constant current constant voltage (CC/CV) mode, some advanced charger with high-speed charging capacity, charging time only 25 minutes or even 10 minutes. (such as the international four-car model competition with battery charger). The principle is: the use of high-current charging, the core charge to the saturated gasification point instantaneous reversal of discharge immediately to absorb the resulting gas ... Keep circulating until the battery is full. In principle, there is a way to detect when the battery reaches an over-charging temperature rise acceleration, and there is a slight decrease in voltage when the battery charge reaches saturation dt/dt. Monitoring sampling, calculation and control must be done using dedicated LSI precision chips, GP three-generation 1800mah one-hour fast charger is the Δ v way.

mobile phone commonly used lithium-ion (Lion) battery charger is a constant current limit voltage charging system, charging current generally use C2 around----that is, the use of two-hour charging rate, such as 500mah Battery with 250ma charge of about two hours to 4. 2V and then constant voltage charging.

the charge and discharge of lead-acid battery is a complicated electrochemical process. Generally, charging current in the charging process with the exponential decline in time, it is not possible to automatically press constant current or constant voltage charging. There are many factors that affect the charging process, such as the concentration of electrolyte, the concentration of the active material of the plate, the temperature of the environment and so on, which will make the charging greatly different.