USRE48193E1 - No point of contact charging system - Google Patents

No point of contact charging system Download PDF

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Publication number
USRE48193E1
USRE48193E1 US13/750,494 US200513750494A USRE48193E US RE48193 E1 USRE48193 E1 US RE48193E1 US 200513750494 A US200513750494 A US 200513750494A US RE48193 E USRE48193 E US RE48193E
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Prior art keywords
electronic device
power
unit
charging
wireless power
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US20130154559A1 (en
Inventor
Ki-Young Cho
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GE Hybrid Technologies LLC
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GE Hybrid Technologies LLC
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Priority to US13/750,494 priority Critical patent/USRE48193E1/en
Assigned to HANRIM POSTECH CO., LTD. reassignment HANRIM POSTECH CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHO, KI-YOUNG
Assigned to GE HYBRID TECHNOLOGIES, LLC reassignment GE HYBRID TECHNOLOGIES, LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HANRIM POSTECH CO., LTD
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/60—Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/025—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/17—Hygienic or sanitary devices on telephone equipment
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • H02J7/00034—Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates, in general, to a no point of contact charging system and, more particularly, to a no point of contact charging system, which 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 which causes anions to be generated during the charging of the portable terminal or the battery pack, thus destroying bacteria on a terminal and keeping nearby ambient air fresh.
  • a contact type charging scheme or a non-contact charging scheme, which charges a battery using magnetic coupling without electrical contact, in order to solve the problems of the contact type charging scheme that result form the exposure of the contact terminals to the outside, is being used.
  • the present applicant proposed technology that constructs a wireless charging pad for performing a non-contact charging function is configured such that the battery pack of a portable device is placed on the wireless charging pad for performing a non-contact charging function and, therefore, allows non-contact charging to be performed through “Wireless Charging Pad And Battery Pack Employing Radio Frequency Identification Technology (previously filed Korean Appl. No. 2004-48286).”
  • the conventional technology when detecting the portable device or the battery pack placed on the non-contact charging pad, the conventional technology depends on a scheme for transmitting Radio Frequency (RF) carrier signals to the outside through a reader antenna, and then detecting whether return signals exist, so that it is problematic in that the detection of the battery pack and the monitoring and controlling of the charging state through the detection are limitedly performed.
  • RF Radio Frequency
  • a foreign object other than the battery pack or the portable device
  • power transmission is continuously performed, so that a problem occurs in that the foreign object placed on the non-contact charging pad is heated by induction heating.
  • the non-contact charging pad only has a function of charging terminals or battery packs, so that a problem occurs in that the efficiency thereof is lowered.
  • an object of the present invention is to provide a non-contact charging system that detects a portable terminal, a battery pack or a foreign object placed on a non-contact charging pad according to a type, and monitors and controls its charging state through the detection, thus preventing such a foreign object placed on the pad from being heated to high temperature.
  • Another object of the present invention is to provide a non-contact charging system, in which a function of sterilizing a terminal is provided to a non-contact charging pad and causes anions to be generated therefrom, thus enabling sanitary use of the terminal and keeping ambient air nearby thereof fresh.
  • a further object of the present invention is to provide a non-contact charging system, in which a primary core unit included in a non-contact charging pad is provided in a form such that the center portion thereof may be passed through, so that the structure thereof is simplified, charging is available at a defined location and, therefore, the usage efficiency thereof can be increased.
  • the present invention provides 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) includes 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, the electromagnetic waves of which are blocked, 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 an ion generation unit ( 182 ) 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
  • 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 the 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.
  • 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 ), includes a differential amplifier ( 171 ) to which signals output from both ends of the resistor are input, and a comparator/low frequency filter ( 172 ) which is coupled to an output terminal of the differential amplifier ( 171 ), and detects variation in current by comparing the output voltage of the differential amplifier ( 171 ) with a predetermined reference voltage, filters out a comparison current depending on variation in current, and outputs the comparison current.
  • the central processing unit ( 180 ) is configured to process information fed back from a dust and odor sensor ( 181 ) and switch the operation mode of the ion generation unit ( 182 ).
  • the primary core unit ( 130 ) is configured such that coils (Pcoil 1 and Pcoil 2 ) are wound around a plate core member ( 131 ) in which a central opening ( 132 ) is formed.
  • 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.
  • the coils (Pcoil 1 and Pcoil 2 ) are wound around the plate core member ( 131 ) in series or in parallel.
  • the battery pack (B) includes a secondary core unit ( 210 ) configured to induce power through the primary core unit ( 130 ); a secondary rectification circuit unit ( 200 ) coupled to the coil (Scoil 1 ) of the secondary core unit ( 120 ) to rectify the induced power; a charging control unit ( 230 ) comprising a charging adjustment circuit ( 230 a) for supplying a fuel gauge ( 230 b) 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 ( 210 b) for supplying a battery BAT through a protection circuit ( 240 ) with power supplied from the charging adjustment circuit ( 230 a), 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 dis
  • a shield plate ( 260 ) having a film shape is interposed between the secondary core unit ( 210 ) of the battery pack (B) and a battery case ( 250 ), and the protection circuit unit ( 240 ) is surrounded by a shield member ( 241 ).
  • 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).
  • the foreign object detection unit ( 220 ) detects instantaneous power at the same time that the batter 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 (Q 3 ) 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 (Q 3 ) 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 ).
  • components for detecting a portable terminal, a battery pack or a foreign object that is placed on the pad of a non-contact charger, and effectively monitoring and controlling its charging state through the detection are added, so that the efficiency of the entire circuit is improved, and the foreign object can be prevented from being heated by induction heating.
  • a function of sterilizing a terminal is provided to a non-contact charging pad and also anions are generated therefrom, so that the terminal can be sanitarily used and nearby ambient air thereof can be kept fresh.
  • a primary core unit included in a non-contact charging pad is provided in a form such that the center portion thereof may be passed through, so that the structure thereof is simplified, charging is available at a defined location and, therefore, the usage efficiency thereof can be increased.
  • FIG. 1 is a block diagram showing the construction of a non-contact charging system according to the present invention
  • FIGS. 2 and 3 are perspective views showing a primary core unit disposed in the non-contact charging system according to the present invention
  • FIGS. 4, 5 and 6 are perspective views showing the use of the primary core unit disposed in the non-contact charging system according to the present invention
  • FIG. 7 is a view showing a direction of rotation of a magnetic field depending on each mode of operation in a series resonance type converter provided in the non-contact charging system according to the present invention.
  • FIG. 8 is a perspective view showing the construction of a battery pack provided in the non-contact charging system according to the present invention.
  • FIG. 9 is a diagram illustrating an algorithm that executes when a battery pack, in which a secondary core unit is contained, is placed on the non-contact charging system according to the present invention.
  • FIG. 10 is a diagram illustrating an algorithm that execute when a foreign object made of metal is placed on the non-contact charging system according to the present invention.
  • FIG. 11 is a diagram illustrating the algorithm and state of the non-contact charging system according to the present invention.
  • FIG. 1 is a block diagram showing the construction of a non-contact charging system according to the present invention.
  • the non-contact charging system includes a battery pack B charged by an induced electromotive force that is generated in a non-contact charger A supplied with power.
  • the non-contact charger A blocks electromagnetic waves caused by Alternating Current (AC) power (110/220V) input using an electromagnetic wave filter 100 that is connected to the power input terminal of a wireless charging pad, and a primary rectification circuit 110 rectifies the AC power, the electromagnetic waves of which are blocked, to create DC power.
  • a flyback converter 110 ′ contains a transistor, stores power transferred from the primary rectification circuit 110 while the contained transistor is turned on. In contrast, the flyback converter 110 ′ simultaneously applies an input voltage to a gate driver 160 , a central processing unit 180 and an ion generation unit 182 and a driving voltage to a series resonance type converter 120 when the contained transistor is turned off.
  • a current detection unit 170 is interposed between the flyback converter 110 ′ and the series resonance type converter 120 , detects variation in current resulting from the approach of the battery pack B, and outputs a comparison current depending on variation in the current.
  • the current detection unit 170 is connected to both ends of a resistor connected to the output terminal of the flyback converter 110 ′ and the input terminal of the series resonance type converter 120 , has a differential amplifier 171 , to which signals output from both ends of the resistor are input, and a comparator/low-frequency filter 172 , coupled to the output terminal of the differential amplifier 171 .
  • the current detection unit 170 detects variation in current by comparing the output voltage of the differential amplifier 171 with a predetermined reference voltage, filters out a comparison current depending on the amount of variation in current, and outputs the result.
  • the central processing unit 180 detects the approach of the battery pack B using the comparison current input from the current detection unit 170 , controls the gate drive 160 depending not only on whether a battery pack B approaches but also on the current of a temperature protection circuit unit 183 for stopping 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. Furthermore, the central processing unit 180 performs the determination of information fed back from a dust and odor sensor 181 and switches the operation mode of the ion generation unit 182 .
  • the gate driver 160 outputs gate signals under the control of the central processing unit 180 , and the series resonance type converter 120 adjusts the waveforms of voltage and current applied to the primary core unit 130 in response to the gate signals input from the gate driver 160 .
  • 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 by the control of the central processing unit 180 , and allows the waveforms of the input voltage and current to be adjusted by charging and discharging parallel capacitors coupled to respective switching devices.
  • the series resonance type converter 120 is configured to adjust the waveforms of the voltage and the current applied to the primary core unit 130 by the gate signals.
  • the primary core unit 130 is configured to be switched by the series resonance type converter 120 and, therefore, generate an induced electromotive force.
  • FIGS. 2 and 3 are perspective views showing a primary core unit disposed in the non-contact charging system according to the present invention
  • FIGS. 4, 5 and 6 are perspective views showing the use of the primary core unit disposed in the non-contact charging system according to the present invention.
  • the primary core unit 130 is configured such that coils Pcoil 1 and Pcoil 2 are wound around a plate core member 131 in which a central opening 132 is formed, and is configured such that pieces of amorphous metal or ferrite material, such as Cobalt Co, Iron Fe, Nickel Ni, Boron B or Silicon Si, having high magnetic permeability (>80,000) and an unbroken characteristic, are attached thereto.
  • amorphous metal or ferrite material such as Cobalt Co, Iron Fe, Nickel Ni, Boron B or Silicon Si, having high magnetic permeability (>80,000) and an unbroken characteristic.
  • the plate core member 131 is formed in a polygonal shape, it may be formed in either circular or elliptical shapes in addition to the polygonal shape.
  • the central opening 132 is configured such that a function, which is capable both of reducing the amount of material used and of maximizing the area for radiating heat, is provided.
  • the coils Pcoil 1 and Pcoil 2 are configured to be wound around the plate core member 131 in series or in parallel, and it is preferable to use a single wire, a paired wire, a Litz wire or a copper foil.
  • the start points of the coils Pcoil 1 and Pcoil 2 are formed by winding the coils in the same directions, and the ends of the coils Pcoil 1 and Pcoil 2 are configured to be matched with Lr and Lr′, respectively, and to be switched using two series resonance type converters.
  • driven switching adjusts the phase of a signal Q 1 and the phase of a signal Q 2 , thus inducing LC resonance, so that energy is stored in a secondary coil.
  • the switching patterns of the coils Pcoil 1 and Pcoil 2 are alternately generated, so that a magnetic field shown in FIG. 7 rotates 360°, and induced energy can be stored regardless of the location of the secondary coil wound in a single direction.
  • primary core units 130 and 130 ′ can be placed on one side of the circuit 134 in series or parallel.
  • Power rectified by the secondary rectification circuit 200 is supplied to a foreign object detection unit 220 , and the supplied power is applied to a charging adjustment circuit 230 a in response to the output of the foreign object detection unit 220 .
  • the foreign object detection unit 220 detects power at the moment at which the battery pack B that contains the secondary core unit 210 , that is, a secondary module, is placed on the non-contact charger A, and is maintained in a no load state (the current of the current detection unit is smaller than a no load reference value) by maintaining a switch Q 3 in an OFF state for a predetermined time (several tens of ms).
  • the foreign object detection unit 220 When a predetermined period of time has lapsed after the no load state, the foreign object detection unit 220 is switched into a load state (the current of the current detection unit is larger than the no load reference value) by maintaining the switch Q 3 in an ON state, and informs 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, applies power to a charging control unit 230 .
  • the current of the current detection unit 170 becomes smaller than the reference value of the no load state when the charging is completed and, at the same time, the secondary core unit 210 enters the no load state again, so that a fully-charging state is indicated by a Light Emitting Diode (LED) or a Liquid Crystal Display (LCD).
  • LED Light Emitting Diode
  • LCD Liquid Crystal Display
  • the charging control unit 230 includes the charging adjustment circuit 230 a and a fuel gauge 230 b, and performs both charging adjustment and fuel gauge functions.
  • the charging adjustment circuit 230 a supplies the fuel gauge 230 b with power rectified by the secondary rectification circuit 200 , and applies voltage to a RFID control unit (not shown) in response to the output of the secondary rectification circuit 200 .
  • the fuel gauge 230 b supplies a battery BAT through a protection circuit 240 with power supplied from the charging adjustment circuit 230 a, generates charging state information and periodically records the information in the RFID control unit (not shown) while monitoring the charging state of the battery BAT.
  • the protection unit is coupled between the charging control unit 230 and the battery BAT, and adjusts the charging and discharging of the battery BAT depending on whether the battery BAT is to be charged or discharged.
  • the RFID control unit (not shown), the RFID information of the battery BAT is stored and, at the same time, the charging state information is periodically recorded.
  • the RFID control unit When receiving an RF carrier, the RFID control unit generates RFID data, including the stored RFID and charging state information of the battery BAT, in response to the received RF carrier, modulates the RFID data, and wirelessly transmits the modulated RFID data through a tag antenna.
  • the battery BAT is charged depending on the adjustment of the protection circuit unit 240 .
  • the charging control unit 230 is formed by integrating circuits optimized to perform both the charging control function of controlling the charging and discharging of the battery BAT using the power rectified by the secondary rectification circuit 200 , and the fuel gauge function of generating the charge state information and periodically recording the generated information while monitoring the charging state of the battery B.
  • FIG. 8 is a perspective view showing the construction of the battery pack provided in the non-contact charging system according to the present invention.
  • the battery pack B is configured such that a shield plate 260 having a film shape is interposed between the secondary core unit 210 and a battery case 250 , thus preventing the temperature of the battery BAT from increasing due to an induced electromotive force generated by the induction of an electromagnetic field and, therefore, enhancing the stability of the battery pack B, and is also configured such that sufficient electromotive force is generated by reducing the interference of the electromagnetic field caused by the induced electromotive force, thus enhancing the charging rate.
  • the shield member 241 is formed in a box form so as to surround the protection circuit unit 240 . It is preferred that the entire protection circuit unit 240 is formed by molding.
  • FIG. 9 is a diagram illustrating an algorithm that executes when a battery pack, in which a secondary core unit is contained, is placed in the non-contact charging system according to the present invention.
  • FIG. 10 is a diagram illustrating an algorithm that executes when a foreign object, which is made of metal, is placed on the non-contact charging system according to the present invention.
  • FIG. 11 is a diagram illustrating the algorithm and states of the non-contact charging system according to the present invention.
  • the foreign detection unit 220 detects instantaneous power at the same time that a battery pack B is placed on the wireless charging pad, and allows a no load state to be maintained by maintaining the switch Q 3 in an OFF state for a certain period of time.
  • the foreign detection unit 220 maintains the state at which the current of the current detection unit 170 becomes smaller than the no load reference value for the period of time, and then allows the no load state to be switched into a load state by maintaining the switch Q 3 in an ON state. At this time, the current of the current detection unit 170 becomes larger than the no load reference value, so that the foreign object detection unit 220 informs the primary coil through load modulation that a battery pack B containing a secondary core unit 210 has been placed on the non-contact charger A and, at the same time, applies power to the charging control unit 230 .
  • the current of the current detection unit 170 becomes smaller than the reference value of the no load state when the charging is completed and, at the same time, the secondary core unit 210 enters the no load state, so that a fully-charging state is indicated by a LED or a LCD.
  • the power is applied to the charging control unit 230 , and the operation mode of the ion generation unit 182 is switched by allowing the central processing unit 180 to determine information fed back from the odor sensor 181 , so that a plurality of ions generated by the ion generation unit 182 , are spread to the area around the wireless charging pad. Accordingly, the bacteria on the battery pack can be destroyed and, at the same time, the ambient air near the wireless charging pad can be purified.
  • the switch Q 3 is maintained in an OFF state for a certain period of time and the no load state is maintained by detecting instantaneous power at the same time that a batter pack B is placed on the wireless charging pad, and a current below the reference value is supplied and is then blocked by the central processing unit 180 to which the currents of the current detection unit 170 and the temperature protection circuit unit 183 are applied, so that damage caused by overheating is prevented.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Epidemiology (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Veterinary Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Signal Processing (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
US13/750,494 2005-03-21 2005-04-11 No point of contact charging system Active 2026-05-11 USRE48193E1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US13/750,494 USRE48193E1 (en) 2005-03-21 2005-04-11 No point of contact charging system

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
KR1020050023184A KR100554889B1 (ko) 2005-03-21 2005-03-21 무접점 충전 시스템
KR10-2005-0023184 2005-03-21
PCT/KR2005/001037 WO2006101285A1 (fr) 2005-03-21 2005-04-11 Système de charge sans point de contact
US13/750,494 USRE48193E1 (en) 2005-03-21 2005-04-11 No point of contact charging system
US10/570,041 US7443135B2 (en) 2005-03-21 2005-04-11 No point of contact charging system
US91430310A 2010-10-28 2010-10-28

Publications (1)

Publication Number Publication Date
USRE48193E1 true USRE48193E1 (en) 2020-09-01

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US13/750,494 Active 2026-05-11 USRE48193E1 (en) 2005-03-21 2005-04-11 No point of contact charging system
US12/914,303 Ceased USRE44038E1 (en) 2005-03-21 2005-04-11 No point of contact charging system
US10/570,041 Ceased US7443135B2 (en) 2005-03-21 2005-04-11 No point of contact charging system
US13/750,494 Granted US20130154559A1 (en) 2005-03-21 2013-01-25 No point of contact charging system

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US12/914,303 Ceased USRE44038E1 (en) 2005-03-21 2005-04-11 No point of contact charging system
US10/570,041 Ceased US7443135B2 (en) 2005-03-21 2005-04-11 No point of contact charging system
US13/750,494 Granted US20130154559A1 (en) 2005-03-21 2013-01-25 No point of contact charging system

Country Status (6)

Country Link
US (4) USRE48193E1 (fr)
EP (3) EP3525315A1 (fr)
JP (1) JP4258568B2 (fr)
KR (1) KR100554889B1 (fr)
CN (1) CN100362725C (fr)
WO (1) WO2006101285A1 (fr)

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US11456610B2 (en) * 2019-02-20 2022-09-27 Samsung Sdi Co., Ltd. Internal short sensing battery control apparatus and battery control method
US11689856B2 (en) 2015-11-19 2023-06-27 The Lovesac Company Electronic furniture systems with integrated induction charger

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Publication number Priority date Publication date Assignee Title
KR100554889B1 (ko) 2005-03-21 2006-03-03 주식회사 한림포스텍 무접점 충전 시스템
US7825543B2 (en) 2005-07-12 2010-11-02 Massachusetts Institute Of Technology Wireless energy transfer
EP2306616B2 (fr) 2005-07-12 2023-06-21 Massachusetts Institute of Technology (MIT) Transfert d'énergie non radiative sans fil
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