1. By converting electrical energy into mechanical energy, the hand drill is charged and stored.
2. When the hand drill base is inserted into the power supply, the power supply will provide DC current, and the alternating current will be converted into direct current through the circuit conversion inside the charger.
The direct current passes through the current controller, which controls the size and stability of the current, and then enters the battery pack. The lithium-ion battery inside the battery pack converts electrical energy into chemical energy, which is stored inside the battery. What is more, with the continuous progress of science and technology, it is also constantly improving.
At present, some high-end hand drill base adopts fast charging technology, which can be fully charged in a short time, and has intelligent charging protection function, which can avoid overcharge and overdischarge, and extend the service life of the battery. In addition, there are some hand drill base using wireless charging technology, through electromagnetic induction or resonance principle, the power can be transmitted to the hand drill, making charging more convenient and efficient.
Cordless charging drill generally uses a miniature battery, and the charging of 12v battery, in principle, the voltage should not be higher than 14.4v, and the charging current is not higher than one tenth of the battery capacity, so the charging equipment that meets the above requirements can be used. Original or three-stage special charging equipment is better.
Can not use the ordinary 12-volt output transformer after rectification charge, this voltage is too low to charge, but can not directly charge from the output transformer sub-pole connection, the sub-pole output is alternating current.
Electric drill battery charger principle, the mains through the switching power supply or transformer step-down to low-voltage DC, charging the battery, the battery is full of charging current will be reduced, the charger light green, charging completed.