The basic principle of a battery charger is to meet the charging needs of different types of batteries by adjusting the output voltage and current. Specifically:
Constant Current Charging: The current detection circuit inside the charger can regulate the output current according to the charging status of the battery to ensure that the battery will not be damaged by overcharging. For example, the TSM101 chip detects the battery voltage and current and maintains a stable output voltage by controlling the switching of the MOS tubes.
Voltage control: The charging current of the charger is affected by the current sampling resistor, when the charging current increases, the voltage across the sampling resistor will also increase. In order to keep the output voltage stable, the constant current source needs to increase the voltage so that the constant current source will keep the current constant by increasing the voltage.
Control of charging stages: Some types of chargers are able to control the maximum charge current of the battery in stages during the charging process. For example, a lithium-ion battery charger will vary the amount of charging current during different stages of charging to optimize charging efficiency and avoid overcharging.
Monitoring of charging status: The charger also needs to monitor the charging status of the battery in order to stop charging or adjust charging parameters in a timely manner. For example, a lithium-ion battery charger will adjust the size of the charging current according to the charging progress of the battery.
In summary, the core function of a battery charger is to charge the battery quickly and safely using the appropriate voltage and current, while taking into account the protection of battery health and prolonged service life.
Post time: Mar-12-2024