Claims for Patent: RE44038

Summary for Patent: RE44038

Title:	No point of contact charging system
Abstract:	Disclosed herein is a non-contact charging system. The non-contact charging system detects a portable terminal, a battery pack or a foreign object that is placed on the pad of a non-contact charger, and effectively monitors and controls its charging state through the detection, thus preventing such a foreign object placed on the pad from being heated by induction heating, and further causes anions to be generated during the charging of the portable terminal or the battery pack, thus sterilizing bacteria on a terminal and keeping ambient air thereof fresh.
Inventor(s):	Cho; Ki-Young (Gunpo-si, KR)
Assignee:	Hanrim Postech Co., Ltd. (Suwon-si, KR)
Application Number:	12/914,303
Patent Claims:	1. A non-contact charging system having a battery pack (B) charged by an induced electromotive force generated from a non-contact charger (A) supplied with power, wherein the non-contact charger (A) comprises: an electromagnetic wave filter (100) connected to a power input terminal to block electromagnetic waves caused by Alternating Current (AC) power; a primary rectification circuit (110) for rectifying the AC power, to Direct Current (DC) power; a flyback converter (110') for storing power transferred from the primary rectification circuit (110) while a contained transistor is turned on, and applying an input voltage to a gate driver (160), a central processing unit (180) and applying a driving voltage to a series resonance type converter (120) when the contained transistor is turned off; a current detection unit (170) interposed between the flyback converter (110') and the series resonance type converter (120) to detect a variation in current resulting from an approach of the battery pack (B) to a non-contact charging pad, and outputting a comparison current depending on the variation in current; the central processing unit (180) for detecting the approach of the battery pack (B) using the comparison current output from the current detection unit (170), controlling the gate drive (160) according not only to whether the battery pack (B) approaches but also to the current of a temperature protection circuit unit (183) to stop the switching of the gate drive (160) when abnormal operation occurs or the temperature of a foreign object placed on the non-contact charging pad exceeds a predetermined temperature; the gate driver (160) for outputting gate signals under the control of the central processing unit (180); the series resonance type converter (120) for adjusting the waveforms of voltage and current applied to a primary core unit (130) in response to the gate signals input from the gate driver (160); and the primary core unit (130) switched by the series resonance type converter (120) to generate the induced electromotive force, wherein the battery pack (B) comprises: a secondary core unit (210) configured to induce power through the primary core unit (130); a secondary rectification circuit unit (200) coupled to a coil (Scoil1) of the secondary core unit (120) to rectify the induced power; a charging control unit (230) comprising a charging adjustment circuit (230a) for supplying a fuel gauge (230b) with power rectified by the secondary rectification circuit (200), and applying voltage to a Radio Frequency Identification (RFID) control unit in response to the output of the secondary rectification circuit (200), and the fuel gauge (210b) for supplying a battery BAT through a protection circuit (240) with power supplied from the charging adjustment circuit (230a), and generating charging state information and periodically records the information while monitoring the charging state of the battery BAT; and a protection circuit unit (240) coupled between the charging control unit (230) and the battery (BAT) to control whether to perform charging or discharging depending on a charged state of the battery (BAT), and a shield plate (260) having a film shape, interposed between the secondary core unit (210) of the battery pack (B) and a battery case (250), the protection circuit unit (240) being surrounded by a shield member (241). 2. The non-contact charging system according to claim 1, wherein the gate driver (160) allows two switching devices, which are provided in the series resonance type converter (120), to be alternately turned on in response to the gate signals output under control of the central processing unit (180), thus adjusting the waveforms of the input voltage and current through charging and discharging parallel capacitors coupled to respective switching devices. 3. The non-contact charging system according to claim 1, wherein the current detection unit (170) is connected to both ends of a resistor connected to an output terminal of the flyback converter (110') and an input terminal of the series resonance type converter (120), comprises a differential amplifier (171) to which signals output from both ends of the resistor are inputted, and a comparator/low frequency filter (172) which is coupled to an output terminal of the differential amplifier (171), and detects the variation in current by comparing the output voltage of the differential amplifier (171) with a predetermined reference voltage, filters out the comparison current depending on variation in current, and outputs the comparison current. 4. The non-contact charging system according to claim 1, wherein the central processing unit (180) is configured to process information fed back from a dust and odor sensor (181) and switch an operation mode of the ion generation unit (182). 5. The non-contact charging system according to claim 1, wherein the primary core unit (130) is configured such that coils (Pcoil1 and Pcoil2) are wound around a plate core member (131) in which a central opening (132) is formed. 6. The non-contact charging system according to claim 5, wherein the plate core member (131) is formed in a polygonal shape, a circular shape, or elliptical shape, and is configured such that pieces of amorphous metal or ferrite material are attached thereto. 7. The non-contact charging system according to claim 5, wherein the coils (Pcoil1 and Pcoil2) are wound around the plate core member (131) in series or in parallel. 8. The non-contact charging system according to claim 1, wherein the charging control unit (230) is formed by integrating circuits optimized to perform both a charging control function of controlling the charging and discharging of the battery (BAT) using the power rectified by the secondary rectification circuit (200), and a fuel gauge function of generating the charge state information and periodically recording the generated information while monitoring the charging state of the battery (B). 9. The non-contact charging system according to claim 1, wherein the foreign object detection unit (220) detects instantaneous power at the same time that the battery pack (B) containing the secondary core unit (210) is placed on the wireless charger (A) and allows a no load state to be maintained by maintaining a switch (Q3) in an OFF state for a certain period of time, and allows the no load state to be switched into a load state by maintaining the switch (Q3) in an ON state after the no load state has been maintained for the period of time, thereby informing the primary coil through load modulation that the battery pack (B) containing the secondary core unit (210) has been placed on the non-contact charger (A) and, at the same time, applying power to a charging control unit (230). .Iadd.10. A charger for wirelessly charging an electronic device placed on a charging pad of the charger, comprising: a first and a second terminals that receive a DC voltage signal therebetween; a converter to adjust the DC voltage signal and provide a switching signal to a primary core unit to generate an induced electromotive force for transmission to the electronic device; a sensor unit interposed between the first terminal and the converter to sense a variation in one of a voltage and a current between the first terminal and the converter to generate a comparison current based on the sensed variation; and a processing unit configured to detect an approach of an external object based on the value of the comparison current, wherein the processing unit is configured to measure the value of the comparison current when no object is placed on the charging pad, and stores the value of the comparison current as a reference current value, wherein the processing unit is configured to detect a change in the comparison current, the change in the comparison current being triggered by placing an external object on the charging pad; and wherein the processing unit is configured to obtain a value of the comparison current as an object-presented current value in response to the change in the comparison current, and wherein the processing unit is configured to, in response to a detection of the change in the comparison current by the processing unit, compare the reference current value with the object-presented current value, determine whether the reference current value is less than the object-presented current value, and decide a type of the external object in response to an outcome of the comparison..Iaddend. .Iadd.11. The charger according to claim 10, wherein the processing unit enables the primary core unit to generate the induced electromotive force in response to a determination that the object-presented current value is less than the reference current value, which is indicative of the external object being a wirelessly chargeable device..Iaddend. .Iadd.12. The charger according to claim 11, wherein the processing unit is configured to, upon the determination that the object-presented current value is less than the reference current value receive information on an identity of the wirelessly chargeable device through load modulation from the wirelessly chargeable device after a first predetermined period of time..Iaddend. .Iadd.13. The charger according to claim 10, wherein the processing unit disables the primary core unit from generating the induced electromotive force in response to a determination that the object-presented current value is greater than the reference current value, which is indicative of the external object being a foreign object not suitable for wireless charging..Iaddend. .Iadd.14. The charger according to claim 10, further comprising a gate driver for outputting a gate signal to the converter under control of the processing unit, wherein the converter adjusts waveforms of the switching signal in response to the gate signal..Iaddend. .Iadd.15. The charger according to claim 14, further comprising a resistor connected between the first terminal and the converter in parallel to the sensor unit..Iaddend. .Iadd.16. The charger according to claim 15, wherein the sensor unit comprises a differential amplifier which is connected to the resistor in parallel, and a comparator, which is coupled to an output terminal of the differential amplifier, that senses the variation by comparing an output voltage of the differential amplifier with a predetermined reference voltage, and outputs the comparison current based on a comparison result thereof..Iaddend. .Iadd.17. The charger according to claim 10, wherein the converter is a series resonance type converter..Iaddend. .Iadd.18. The charger according to claim 10, further comprising a power generator circuit configured to generate the DC voltage signal based on an external AC power signal and output the DC voltage signal to apply to the first and second terminals..Iaddend. .Iadd.19. The charger according to claim 18, the power generator circuit comprises a rectification circuit to rectify the external AC power signal..Iaddend. .Iadd.20. A method of wirelessly charging an electronic device placed on a charging pad of a wireless charger, comprising: receiving a DC voltage signal between a first and a second terminals; converting the DC voltage signal by a converter and providing a switching signal to a primary core unit to generate an induced electromotive force for transmission to the electronic device; sensing a variation in one of a voltage and a current between the first terminal and the converter and generating a comparison current based on the sensed variation of the voltage or the current; memorizing the value of the comparison current as a reference current value; detecting a change in the value of the comparison current being triggered by placing an external object on the charging pad; in response to the change in the comparison current, obtaining a value of the comparison current as an object-presented current value; comparing the reference current value with the object-presented current value, and determining whether the reference current value is less than the object-presented current value; and deciding a type of the external object in response to the comparison..Iaddend. .Iadd.21. The method according to claim 20, further comprising: enabling the primary core unit to generate the induced electromotive force in response to a determination that the object-presented current value is less than the reference current value, which is indicative of the external object being a wirelessly chargeable device..Iaddend. .Iadd.22. The method according to claim 21, further comprising: upon a determination that the object-presented current value is less than the reference current value, receiving information on an identity of the wirelessly chargeable device through load modulation from the wirelessly chargeable device after a first predetermined period of time..Iaddend. .Iadd.23. The method according to claim 20, further comprising: disabling the primary core unit from generating the induced electromotive force in response to a determination that the object-presented current value is greater than the reference current value, which is indicative of the external object being a foreign object not suitable for wireless charging..Iaddend. .Iadd.24. An electronic device, comprising: a battery cell; an induction coil configured to generate a power signal from a magnetic field applied thereto; a rectification unit configured to rectify the power signal to generate a rectified power signal; a foreign object indication unit having a switch, the foreign object indication unit being configured to receive the rectified power signal and transfer the rectified power signal to a charging control unit through the switch; and the charging control unit configured to process the power signal to charge the battery cell with the processed power signal, wherein the foreign object indication unit is configured to control an on/off state of the switch in response to an instantaneous input of the rectified power, and wherein the foreign object indication unit turns off the switch in response to start of an input of the rectified power signal to disable the transfer of the rectified power signal to the charging control unit..Iaddend. .Iadd.25. The electronic device according to claim 24, wherein the foreign object indication unit maintains the off state of the switch for a first predetermined period of time after turning off the switch in response to the start of the input of the rectified power signal, and thereafter turns on the switch to start transfer of the rectified power signal to the charging control unit..Iaddend. .Iadd.26. The electronic device according to claim 25, wherein the first predetermined period of time is several tens of milliseconds..Iaddend. .Iadd.27. The electronic device according to claim 25, wherein the foreign object indication unit is configured to transmit an information signal on an identity of the wirelessly chargeable battery pack by way of load modulation through the induction coil to a wireless charger after the first predetermined period of time has passed..Iaddend. .Iadd.28. A battery pack, comprising: a battery cell; an induction coil configured to generate a power signal from a magnetic field applied thereto; a rectification unit configured to rectify the power signal to generate a rectified power signal; a foreign object indication unit having a switch, the foreign object indication unit being configured to receive the rectified power signal and transfer the rectified power signal to a charging control unit through the switch; and the charging control unit configured to process the power signal to charge the battery cell with the processed power signal, wherein the foreign object indication unit is configured to control an on/off state of the switch in response to an instantaneous input of the rectified power, and wherein the foreign object indication unit turns off the switch in response to start of an input of the rectified power signal to disable the transfer of the rectified power signal to the charging control unit..Iaddend. .Iadd.29. The battery pack according to claim 28, wherein the foreign object indication unit maintains the off state of the switch for a first predetermined period of time after turning off the switch in response to the start of the input of the rectified power signal, and thereafter turns on the switch to start transfer of the rectified power signal to the charging control unit..Iaddend. .Iadd.30. The batter,/pack according to claim 29, wherein the first predetermined period of time is several tens of milliseconds..Iaddend. .Iadd.31. The batter,/pack according to claim 29, wherein the foreign object indication unit is configured to transmit an information signal on an identity of the wirelessly chargeable battery pack by way of load modulation through the induction coil to a wireless charger after the first predetermined period of time has passed..Iaddend. .Iadd.32. A method of wirelessly charging a battery pack comprising: generating a power signal from an induction coil to an externally applied magnetic field; rectifying the power signal to generate a rectified power signal; transferring the rectified power signal to a charging control unit through a switch of a foreign object indication unit; and processing the power signal to charge a battery cell with the processed power signal; wherein an on/off state of the switch is controlled in response to an instantaneous input of the rectified power, and wherein the switch is turned off in response to a start of an input of the rectified power signal to disable the transfer of the rectified power signal to the charging control unit..Iaddend. .Iadd.33. The method according to claim 32, wherein the off state of the switch is maintained for a first predetermined period of time after turning off the switch in response to the start of the input of the rectified power signal, and thereafter the switch is turned on to start transfer of the rectified power signal to the charging control unit..Iaddend. .Iadd.34. The method according to claim 33, wherein the first predetermined period of time is several tens of milliseconds..Iaddend. .Iadd.35. The method according to claim 34, further comprising: transmitting an information signal on an identity of the wirelessly chargeable battery pack by way of load modulation through the induction coil to a wireless charger after the first predetermined period of time has passed..Iaddend.

Details for Patent RE44038

Applicant	Tradename	Biologic Ingredient	Dosage Form	BLA	Approval Date	Patent No.	Expiredate
Emergent Biosolutions Canada Inc.	BAT	botulism antitoxin heptavalent (a, b, c, d, e, f, g) - (equine)	Solution	125462	03/22/2013		2025-03-21