Step 1\/4
When the phone starts charging, the electrons in the positive part of the battery will move to the negative terminal, at the same time, the lithium ions in the positive part of the battery will move through the insulating diaphragm in the middle to the negative terminal, stored in the material like a sponge, when the positive lithium ions all move to the negative terminal means that the battery has been full.
Step 2\/4
Lithium battery charging speed refers to the rate at which electrical energy is converted into chemical energy, according to high school physics knowledge: P=IU, that is
Power = current * voltage.
Step 3\/4
To improve the charging power of the mobile phone, it is necessary to increase the charging current or charging voltage, or both at the same time.
Step 4\/4
Charging in the case of undervoltage or overvoltage will cause damage to the battery, so the charging method of lithium batteries is more special. Such a charging process is generally controlled by the built-in power management chip of the phone, and the charger is only regulated according to the instructions of the power chip in most cases
The principle is: the use of high current charging, in the cell charging reaches the saturation gasification point immediately reverse discharge to absorb the generated gas... Cycle until the battery is full. In principle, there is a dT\/dt method to detect the temperature rise acceleration when the battery reaches overcharge, and a -ΔV method to detect the slight drop in voltage when the battery reaches saturation gas. Monitoring sampling, calculation and control must be carried out with a dedicated LSI precision chip, and the GP generation 1800mah one-hour fast charger is -ΔV mode.