Rechargeable Power Supply, Battery Device, Contactless Charger System And Method For Charging Rechargeable Battery Cell
First Claim
1. A charging power supply device contactlessly coupled with a battery device including a secondary coil for induced coupling, a wireless transmitting module for wirelessly transmitting data, a charging control circuit for controlling a charging status of a battery, and a rechargeable battery, the charging power supply device comprising:
- a primary coil for inducing a charging power to the secondary coil;
a wireless receiving module for receiving charging status information from the wireless transmitting module; and
means for driving the primary coil so that a power signal between the primary and secondary coils and a communication signal between the wireless transmitting and receiving modules are not overlapped in aspect of time.
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Accused Products
Abstract
A system, method and apparatus for contact-less charging of battery operated devices is presented. There is a host charger with a power converter and resonant tank circuit and a portable device where the battery is located, with a battery charging control IC. The method obviates the need for a voltage controller in each of both the host and the portable stages, thus decreasing complexity and increasing efficiency. The charging of the battery in the portable device is controlled by a charging controller therein, which is in continual electric communication with the host, whose output power the control IC dynamically monitors and controls. Two embodiments for the charging circuitry in the portable device are presented. In one embodiment component count is minimized but battery charging is not optimized when the battery voltage is very low. In the other embodiment charging efficiency is maximized regardless of the output voltage of the battery, but additional components are utilized.
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Citations
40 Claims
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1. A charging power supply device contactlessly coupled with a battery device including a secondary coil for induced coupling, a wireless transmitting module for wirelessly transmitting data, a charging control circuit for controlling a charging status of a battery, and a rechargeable battery, the charging power supply device comprising:
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a primary coil for inducing a charging power to the secondary coil; a wireless receiving module for receiving charging status information from the wireless transmitting module; and means for driving the primary coil so that a power signal between the primary and secondary coils and a communication signal between the wireless transmitting and receiving modules are not overlapped in aspect of time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A charging device for receiving a power contactlessly from a charging power supply device that generates an AC voltage pulse having a frequency larger than an AC line frequency using an AC line voltage, and charging a rechargeable battery using the power, the charging device comprising:
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a secondary coil magnetically coupled with a primary coil of the charging power supply device to generate an induced electromotive force pulse corresponding to the AC voltage pulse; a charging control circuit for generating a constant voltage and a constant current used for charging the battery on the basis of the induced electromotive force pulse; and a feedback control means for checking a falling edge of the induced electromotive force pulse, and then wirelessly feeding back a feedback response signal including charging status information of the battery to the charging power supply device in case a falling is detected. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A battery device for contactlessly receiving a charging power from a power supply device that generates a pulse width modulation signal having a frequency larger than an AC line frequency using an AC line power, the battery device comprising:
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a rechargeable battery; a secondary coil magnetically coupled with a primary coil of the power supply device to generate an induced electromotive force pulse corresponding to the pulse width modulation signal; a charging control circuit for generating a constant voltage and a constant current used for charging the battery on the basis of the induced electromotive force, and charging the battery using the constant voltage and the constant current; a falling detector for detecting a falling edge of the induced electromotive force pulse; a memory for storing charging status information of the battery and battery specification information; a monitoring circuit for monitoring a charging status of the battery to generate charging status information, and storing the charging status information to the memory; a wireless transmitting module for modulating the charging status information to generate a feedback response signal, and wirelessly transmitting the feedback response signal to the power supply device; and a feedback controller for reading the charging status information from the memory and transmitting the charging status information to the wireless transmitting module in case the falling edge is detected. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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23. A method for charging a battery in a contactless charger system that includes a primary charging unit having a primary coil and a wireless receiving module, a secondary charging unit having a wireless transmitting module and a secondary coil magnetically coupled with the primary coil, and a battery for receiving a charging voltage from the second charging unit, the method comprising:
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(A) applying a power pulse train having a pulse width (W1) to the primary coil to emit out a corresponding magnetic field; (B) wirelessly receiving from the secondary charging unit a charging start signal confirming that the primary coil and the secondary coil are magnetically coupled; (C) generating a charging power pulse train having a pulse width (W2) at least greater than the pulse width (W1) according to the charging start signal, and applying the charging power pulse train to the primary coil to generate a corresponding induced electromotive force pulse to the secondary coil; (D) charging the battery using the induced electromotive force pulse; (E) feeding back the charging status information of the battery from the secondary charging unit; and (F) controlling a pulse width of the charging power pulse based on the charging status information, wherein the wireless feedback signal from the secondary charging unit is synchronized with a falling edge of the induced electromotive force pulse. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A contactless charger system including a primary charging unit having a primary coil and a wireless receiving module, a secondary charging unit having a wireless transmitting module and a secondary coil magnetically coupled with the primary coil, and a battery for receiving a charging voltage from the second charging unit,
wherein the primary charging unit includes means for generating an AC power pulse having a frequency larger than an AC line frequency as an AC line power is applied, and then applying the AC power pulse to the primary coil to induce a high frequency AC power pulse to the secondary coil, wherein the secondary charging unit includes means for transmitting charging status information of the battery to the primary charging unit by using an unused time between pulses of the AC voltage pulse induced by the secondary coil, whereby a power signal between the primary and secondary coils and a communication signal between the wireless transmitting and receiving modules are not overlapped in aspect of time.
Specification