A charging device for carrying out a charging operation to a battery set, comprising:
- a transforming rectifying unit receiving an external input power source and transforming the input power source into a direct-current output power source;
- a voltage current processing unit transforming the direct-current output power source of the transforming rectifying unit into a direct-current power source and a charging power source;
- a microprocessor operating a controlling mode for controlling the charging operation of the battery set, wherein the controlling mode of the microprocessor comprises the following operations of:
- charging the battery set with a charging voltage and a charging current when an output voltage of the battery set is higher than a first charging threshold voltage;
- trickle charging the battery set with a trickle charging voltage identical to the charging voltage and a trickle charging current smaller than the charging current when the output voltage of the battery set is higher than a trickle charging threshold voltage;
- considering the battery set as having an anomaly and terminating the charging operation immediately if the output voltage of the battery set is lowered during the charging operation;
- terminating the charging operation if the charging operation reaches a predetermined charging time;
- and
- charging the battery set again if the output voltage is lower than a second charging threshold voltage that is larger than the first charging threshold voltage;
- an agitating unit controlled by the microprocessor and producing a sine pulse for chemically activating the battery set before carrying out the charging operation so as to remove carbon deposition inside of a battery of the battery set;
- a detecting unit detecting an output voltage of the battery set, producing a detecting signal and then transferring the detecting signal to the microprocessor, wherein the microprocessor determines an electrical status of the battery set according to the detecting signal, the electrical status comprises one of whether charging can be carried out, whether charging is completed, whether carbon deposition can not be removed, and whether an anomaly occurs;
- and
- a display unit controlled by the microprocessor to display a charging status of the battery set;
- wherein the battery set comprises at least one battery, the battery is a primary cell, the input power source is one of an alternating-current input power source and a direct-current input power source, the direct-current power source of the voltage current processing unit is used for power supplying the microprocessor, the agitating unit, the detecting unit and the display unit, and the charging power source is used for charging the battery set.