Current compensation module, charging apparatus, and charging apparatus controlling method

A charging apparatus used for inputting an AC or a DC power from a power input terminal, and outputting a charging power for charging battery module, wherein when the charging apparatus outputs the charging current, there have three operative conditions in a first start-up phase, a second start-up phase, and a third start-up phase;

• the charging apparatus comprising:
• a power conversion module, electrically connected to the power input terminal for receiving the AC or the DC power to convert the charging power for charging the battery module;
• a driving circuit, electrically connected to the power converting module;
• and
• a current compensation module, electrically connected to the driving circuit, to output a control signal inputting the driving circuit, wherein the driving circuit is electrically connected to the power conversion module to make the current compensation module that can adjust and control a charging current of the power conversion module, the current compensation module comprising:
• a transition unit, having an operation of a clamping control for implementing the current compensation module and the charging apparatus, wherein when the charging apparatus is operated in the first start-up phase to output the charging current, the transition unit is employed for the operation of the clamping control, and to make an internal-signal voltage in the current compensation module can be increased from a first voltage;
• a proportional controlling unit, electrically connected to the transition unit, wherein when the internal-signal voltage attains to a second voltage, and that the charging current is lower than a rated output current of the power conversion module, the charging apparatus is operated in the second start-up phase, thus the proportional controlling unit will output a proportional controlling signal to control and adjust the output current of the power conversion module through the driving circuit;
• and
• an integral controlling unit, electrically connected to the proportional controlling unit and the transition unit, wherein when the charging current attains to the rated output current of the power conversion module, the charging apparatus and the current compensation module are operated in the third start-up phase, thus the integral controlling unit incorporates with the proportional controlling unit to output a proportional-integral controlling signal to control and adjust the output current of the power conversion module through the driving circuit to output a constant current for charging the battery module.

A charging apparatus controlling method is employed for a current compensation module in the charging apparatus to adjust and control a charging current of a power conversion module to charge a battery module, wherein when the charging apparatus outputs the charging current, there have three operative conditions in a first start-up phase, a second start-up phase, and a third start-up phase, the method comprising the steps as follow:

• operating a clamp control in the first start-up phase to enable an internal-signal voltage increase from a first voltage;
• wherein, the internal-signal voltage will be increased along with the increased charging current;
• when the increased internal-signal voltage attains to a second voltage, and the charging current is lower than a rated output current of the power conversion module, the current compensation module operates in the second start-up phase to output a proportional controlling signal in order to adjust and control the charging current;
• and
• when the charging current attains to the rated output current of the power conversion module, the current compensation module operates in the third start-up phase to output a proportional-integral controlling signal to adjust and control the power conversion module outputting a constant current, so as to charge the battery module.