Abstract: The present invention is proposed to improve a conventional two-pin charging device (dumb charger), which stops charging when the battery is fully charged and can avoid the inrush current at any charging stage. A novel intelligent securely charging system is proposed, which includes a control module for controlling the operation of the system, a power conversion module for converting the input AC power ACin into the electricity required by the system, a switch module for passing or interrupting electrical power transformation, and a pre-charging module with impedance higher than the switch module used for limiting the inrush current, and a voltage detection module which detects the battery voltage Vb, the charging voltage Va. Further, the pre-charging module maintains in the on-state at any charging stage, and the switching module is configured to be in the on-state or off-state according to the application of the charging stage.

Abstract: A pulse controlled charging method for higher temperature charging in addition to the current-reducing operation at ambient temperature. A specific software control strategy for these purposes is proposed, which can be divided into two parts, (a) two-stage charging current control at ambient temperature, which sets different current-limiting transient points for chargers with different outputs; (b) high-temperature pulse charging, which utilizes an internal NTC (Negative temperature coefficient) thermistor inside the charger to detect the internal temperature of the charger, if the temperature exceeds a pre-determined value, the charging process will be stopped for a period of time to avoid the temperature of the charger becoming too high.

Abstract: A dual port battery charging system comprises a charger, a microcontroller, a first switching unit, a second switching unit, a first charging interface and a second charging interface, wherein the microcontroller is coupled with the first switching unit, the second switching unit, the first charging interface and the second charging interface to detect a voltage and a current of a first battery pack or a second battery pack, and the microcontroller can control the first switching unit and the second switching unit to charge the first battery pack and the second battery pack separately or alternately.

Abstract: An intelligence AC to DC maximum power charging management method of a battery includes providing a battery charger having a power conversion unit coupled to a charging control device, which contains a micro-controller, a voltage detection unit, a current detection unit, a temperature sensor, and a communication port, and providing a battery pack electrically connected to the battery charger enabling the charging controller to provide charging management for the battery pack, wherein the micro-controller can calculate charging power through received battery voltage, battery charger current, and temperature of the battery charger and tracking the maximum output charging power.

Abstract: A dual port battery charging system comprises a charger, a microcontroller, a first switching unit, a second switching unit, a first charging interface and a second charging interface, wherein the microcontroller is coupled with the first switching unit, the second switching unit, the first charging interface and the second charging interface to detect a voltage and a current of a first battery pack or a second battery pack, and the microcontroller can control the first switching unit and the second switching unit to charge the first battery pack and the second battery pack separately or alternately.

Abstract: A pulse controlled charging method for higher temperature charging in addition to the current-reducing operation at ambient temperature. A specific software control strategy for these purposes is proposed, which can be divided into two parts, (a) two-stage charging current control at ambient temperature, which sets different current-limiting transient points for chargers with different outputs; (b) high-temperature pulse charging, which utilizes an internal NTC (Negative temperature coefficient) thermistor inside the charger to detect the internal temperature of the charger, if the temperature exceeds a pre-determined value, the charging process will be stopped for a period of time to avoid the temperature of the charger becoming too high.

Abstract: An intelligence AC to DC maximum power charging management method of a battery includes providing a battery charger having a power conversion unit coupled to a charging control device, which contains a micro-controller, a voltage detection unit, a current detection unit, a temperature sensor, and a communication port, and providing a battery pack electrically connected to the battery charger enabling the charging controller to provide charging management for the battery pack, wherein the micro-controller can calculate charging power through received battery voltage, battery charger current, and temperature of the battery charger and tracking the maximum output charging power.

Abstract: The present invention is a multi-channel intelligent charger, including: power module, providing electric power needed the multi-channel intelligent charger for operation, control module, coupling to power module for controlling the operation of multi-channel intelligent charger, circuit switch module, coupling to control module for switching charging mode, which basis on circumstances of charging, detect module, coupling to circuit switch module, detecting the circumstances of charging, and, charge module, outputting the charging power.

Abstract: The present invention discloses a modulation method for inverter AC waveform. The detailed steps of the modulation method comprise: generating an AC waveform which includes at least three time periods, wherein a middle time period corresponds to a peak segment of the AC waveform, and the remaining time periods are averaged corresponding to the rise and decline segments of the AC waveform; and during the at least three time periods, a duty ratio modulated driving signal is generated according to different duty ratios, so as to modulate the AC waveform and generate a stepping AC waveform converted from the AC waveform. The stepping AC waveform generated by the modulation method of the present invention will have a longer dwell time at zero potential, so as to turn on the AC electric tool more efficiently.