Contact-less chargeable battery and charging device, battery charging set, and charging control method thereof

A contact-less charging circuit module electrically connected to a battery cell and used for charging an electric energy to the battery cell in a contact-less method, the contact-less charging circuit module comprising:

• a high frequency AC current inducing unit to which a high frequency AC current is induced by means of a magnetic field generated from an external contact-less charging device;
• a rectifier for receiving the induced high frequency AC current and converting the induced high frequency AC current into a DC current;
• a constant voltage/constant current supplier for receiving the DC current from the rectifier and supplying a charging power to the battery cell in a constant voltage/constant current mode;
• and
• an overvoltage monitoring unit for monitoring voltages at both ends of the constant voltage/constant current supplier and transmitting a monitoring result to the external contact-less charging device by means of wireless communication so as to induce a change of intensity of the magnetic field.

A contact-less charging device for transmitting a charging power by means of electromagnetic induction phenomenon to a contact-less chargeable battery that has a constant-voltage/constant current supplier to be capable of being charged in a constant voltage/constant current mode and wirelessly transmits a monitoring result for voltages at both ends of the constant voltage/constant current supplier, the contact-less charging device comprising:

• a magnetic field generating unit for receiving an AC current and forming a magnetic field in an outer space;
• a high frequency power driving unit for applying a high frequency AC current to the magnetic field generating unit;
• and
• a charging power adjusting unit for receiving the monitoring result from the contact-less chargeable battery by means of wireless communication and controlling the high frequency power driving unit to adjust a power of the high frequency AC current applied to the magnetic field generating unit so that a charging power transmitted to the battery is adjusted.

A battery charging set including a contact-less chargeable battery and a contact-less charging device,

• wherein the battery includes:
• a high frequency AC current inducing unit to which a high frequency AC current is induced by means of a magnetic field intermittently generated from an external contact-less charging device;
• a rectifier for receiving the induced high frequency AC current and converting the induced high frequency AC current into a DC current;
• a constant voltage/constant current supplier for receiving the DC current from the rectifier and supplying a charging power to a battery cell in a constant voltage/constant current mode;
• and an overvoltage monitoring unit for monitoring voltages at both ends of the constant voltage/constant current supplier and transmitting a monitoring result to the external contact-less charging device by means of wireless communication while a high frequency AC current is not induced,
• wherein the charging device includes:
• a magnetic field generating unit for receiving an AC current and forming a magnetic field in an outer space;
• a high frequency power driving unit for intermittently applying a high frequency AC current to the magnetic field generating unit;
• and
• a charging power adjusting unit for, while a high frequency AC current is not applied to the magnetic field generating unit, receiving the monitoring result by means of wireless communication and controlling the high frequency power driving unit to adjust a power of the high frequency AC current applied to the magnetic field generating unit so that a charging power transmitted to the battery is adjusted.

A method for controlling charging of a contact-less chargeable battery using a contact-less charging device by means of electromagnetic induction phenomenon, the method comprising:

• (a) intermittently applying a high frequency AC current to a primary coil provided to the charging device so as to intermittently generate a magnetic field in an outer region;
• (b) linking a magnetic flux of the generated magnetic filed to a secondary coil provided to the battery so as to intermittently output an electromagnetically-induced high frequency AC current;
• (c) rectifying the output high frequency AC current to be converted into a DC current;
• (d) applying the DC current to a battery cell through a constant voltage/constant current supplier so as to charge the battery cell in a constant voltage/constant current mode;
• (e) monitoring voltages at both ends of the constant voltage/constant current supplier and transmitting a monitoring result to the charging device by means of wireless communication while a high frequency AC current is not induced in the secondary coil;
• and
• (f) adjusting a power of the high frequency AC current applied to the primary coil according to the transmitted monitoring result.