Charging apparatus

A charging apparatus for charging a rechargeable battery system comprising a battery management system and a first communication unit, the first communication unit being electrically connected to the battery management system, the battery management system calculating a current state of charge (SOC) percentage associated with the rechargeable battery system, said charging apparatus comprising:

• an AC/DC converter, for receiving an AC power;
• a controller, electrically connected to the AC/DC converter;
• a DC output unit, respectively electrically connected to the AC/DC converter and the controller, the DC output unit being also electrically connected to the rechargeable battery system with a cable, wherein the controller controls the DC output unit to turn on or off;
• and
• a second communication unit, electrically connected to the controller, the second communication unit being capable of communicating with the first communication unit and being for receiving the current SOC through the first communication unit,
• wherein the controller, according to a plurality of previous charging information, judges if a number of times a first selected SOC percentage being selected equals N, and if yes, the controller determines a second selected SOC, and controls the AC/DC converter to convert the AC power into a charging DC and to output the charging DC to the DC output unit, and controls the DC output unit to output the charging DC to charge the rechargeable battery system until the current SOC percentage equals the second selected SOC percentage, N is an integer larger than 1, the second selected SOC percentage is larger than the first selected SOC percentage.

A charging apparatus for charging a rechargeable battery system, said charging apparatus comprising:

• an AC/DC converter, for receiving an AC power;
• a controller, electrically connected to the AC/DC converter, the controller therein storing a relationship among a plurality of predetermined charging voltage, a plurality of predetermined charging current a plurality of predetermined state of charge (SOC) percentages;
• a DC output unit, respectively electrically connected to the AC/DC converter and the controller, the DC output unit being also electrically connected to the rechargeable battery system with a cable, wherein the controller controls the DC output unit to turn on or off;
• a detection unit, electrically connected to the controller and electrically coupled to the cable, the detection unit being for detecting a charging voltage and a charging current;
• and
• a selection unit, electrically connected to the controller, the selection unit being operated by a user to input an instruction,
• wherein the controller, responsive to the instruction, determines a selected SOC percentage, and determines a current SOC percentage from the plurality of predetermined SOC percentages in accordance with the charging voltage, the charging current and the relationship, the controller controls the AC/DC converter to convert the AC power into a charging DC and to output the charging DC to the DC output unit, and controls the DC output unit to output the charging DC to charge the rechargeable battery system until the current SOC percentage equals the selected SOC percentage.