GB2314470A - Battery charging arrangement with inductively coupled charging device and rechargeable battery device - Google Patents

Battery charging arrangement with inductively coupled charging device and rechargeable battery device Download PDF

Info

Publication number
GB2314470A
GB2314470A GB9612663A GB9612663A GB2314470A GB 2314470 A GB2314470 A GB 2314470A GB 9612663 A GB9612663 A GB 9612663A GB 9612663 A GB9612663 A GB 9612663A GB 2314470 A GB2314470 A GB 2314470A
Authority
GB
United Kingdom
Prior art keywords
induction coil
rechargeable battery
secondary induction
secondary
coil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB9612663A
Other versions
GB9612663D0 (en
Inventor
Chung-Lung Tien
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TIEN CHUNG LUNG
Wang Jack
Original Assignee
Wang Jack
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wang Jack filed Critical Wang Jack
Priority to GB9612663A priority Critical patent/GB2314470A/en
Publication of GB9612663D0 publication Critical patent/GB9612663D0/en
Publication of GB2314470A publication Critical patent/GB2314470A/en
Application status is Withdrawn legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/022Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters characterised by the type of converter
    • H02J7/025Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters characterised by the type of converter using non-contact coupling, e.g. inductive, capacitive
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/033Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/0354Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
    • G06F3/03543Mice or pucks
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/46Accumulators structurally combined with charging apparatus
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44Methods for charging or discharging

Abstract

A battery (24, Figs. 1,2) of a rechargeable battery device 20 is connected to a secondary induction coil 21 which is displaceable relative to a primary induction coil 14 of a charging device 10, so that the battery (24) is charged when the coils 14 and 21 are located adjacent one another such that a current in the coil 14 can induce a current in coil 21. The battery (24) and coil 21 may be incorporated in an electrical product, particularly a wireless electrical product such as a remote control unit, eg. a wireless computer mouse 30. The primary coil 14 is has a transistor driver (13, Figs. 1,2) receiving a pulse train from an oscillator (12), the oscillator (12) and driver (13) being powered by a DC power source (11) which incorporates a voltage regulator (113) for deriving a desired DC voltage from an AC or DC supply. The secondary coil 21 is connected to the battery (24) via rectifier and filter circuits (22, 23). The coils 14 and 21 are preferably planar spiral coils.

Description

RECHARGEABLE POWER SUPPLY WITH RECHARGEABLE BATTERY DEVICE AND CHARGING DEVICE, AND METHOD FOR CHARGING A RECHARGEABLE BATTERY DEVICE The invention relates to a rechargeable power supply, more particularly to a rechargeable power supply which includes a rechargeable battery device and a charging device, and to a method for charging a rechargeable battery device.

A conventional rechargeable power supply includes a rechargeable battery device and a charging device. The charging device is provided with a pair of electrical contacts for connecting electrically with corresponding electrical contacts of the rechargeable battery device to permit the supply of electric current from the charging device to the rechargeable battery device. The electrical contacts of the charging device and the rechargeable battery device are susceptible to corrosion and deformation, thereby resulting in improper connection between the charging device and the rechargeable battery device which can adversely affect the charging operation.

The main object of the present invention is to provide a method for charging a rechargeable battery device which obviates the need for electrical contacts to overcome the aforementioned drawbacks of the prior art.

Another object of the present invention is to provide a rechargeable power supply which includes a rechargeable battery device and a charging device that utilize magnetic coupling to establish electrical connection therebetween.

Still another object of the present invention is to provide a charging device and a rechargeable battery device which incorporate induction coils for establishing magnetic coupling therebetween.

According to one aspect of the present invention, a method for charging a rechargeable battery device with a rechargeable battery cell comprises the steps of: providing the rechargeable battery device with a secondary induction coil which is connected electrically to the rechargeable battery cell; and providing a charging device with a primary induction coil which is displaceable with respect to the secondary induction coil and which is capable of generating a magnetic field for inducing electric current in the secondary induction coil when the primary induction coil is juxtaposed with the secondary induction coil.

According to another aspect of the present invention, a rechargeable power supply comprises: a rechargeable battery device which includes a rechargeable battery cell and a secondary induction coil connected electrically to the rechargeable battery cell; and a charging device which includes a primary induction coil that is displaceable with respect to the secondary induction coil and that is capable of generating a magnetic field for inducing electric current in the secondary induction coil when the primary induction coil is juxtaposed with the secondary induction coil.

According to still another aspect of the present invention, a rechargeable battery device is to be charged by a magnetic field that is generated by a primary induction coil of a charging device. The rechargeable battery device comprises a rechargeable battery cell and a secondary induction coil connected electrically to the rechargeable battery cell The secondary induction coil is displaceable with respect to the primary induction coil. The magnetic field that is generated by the primary induction coil induces electric current in the secondary induction coil when the secondary induction coil is juxtaposed with the primary induction coil.

According to a further aspect of the present invention, a charging device is used to charge a rechargeable battery device which includes a secondary induction coil connected electrically to a rechargeable battery cell. The charging device comprises a primary induction coil which is displaceable with respect to the secondary induction coil and which is capable of generating a magnetic field for inducing electric current in the secondary induction coil when the primary induction coil is juxtaposed with the secondary induction coil.

Other features and advantages of the present invention will become apparent in the following detailed description of the preferred embodiment with reference to the accompanying drawings, of which: Figure 1 is a schematic circuit block diagram of the preferred embodiment of a rechargeable power supply according to the present invention; Figure 2 is a schematic electrical circuit diagram of the preferred embodiment; and Figure 3 is a perspective view illustrating an intended application of the preferred embodiment Referring to Figures 1 and 2, the preferred embodiment of a rechargeable power supply according to the present invention is shown to comprise a charging device 10 and a rechargeable battery device 20.

The charging device 10 includes a DC power source 11, an oscillator circuit 12, a driving circuit 13 and a primary induction coil 14.

In. this embodiment, the DC power source 11 is capable of converting an external AC line input into a desired DC voltage output. However, the DC power source 11 may be replaced by a circuit which converts an external DC input into the desired DC voltage output.

The DC power source 11 includes a plug 111 for connection to an AC line outlet, a diode bridge rectifier 112, a voltage regulator 113, and capacitors C1, C2.

The oscillator circuit 12 includes an integrated oscillator circuit 121 and discrete components, such as resistors R1, R2, VR1 and capacitors C3, C4, C5. The DC voltage output of the DC power source 11 drives the oscillator circuit 12 to generate a pulse train output at the resistor R2.

The driving circuit 13 includes a capacitor C6, a diode D1 and a transistor Q1 which are connected electrically in series. The transistor Q1 has a base terminal connected to the resistor R2. The driving circuit 13 serves to amplify the pulse train output of the oscillator circuit 12.

The primary induction coil 14 is connected across the capacitor C6 so that electric current can be supplied thereto by the driving circuit 13. The primary induction coil 14 generates a magnetic field whenever electric current passes therethrough.

The rechargeable battery device 20 includes a secondary induction coil 21, a rectifier circuit 22, a filter circuit 23, and a rechargeable battery cell 24.

The secondary induction coil 21 is displaceable with respect to the primary induction coil 14. When the secondary induction coil 21 is juxtaposed with the primary induction coil 14, the magnetic field that is generated by the primary induction coil 14 can induce electric current in the secondary induction coil 21.

The rectifier circuit 22 is connected electrically to the secondary induction coil 21 and includes a capacitor C7 and a diode D2. The rectifier circuit 22 serves to rectify the voltage across the secondary induction coil 21.

The filter circuit 23 is connected electrically to the rectifier circuit 22 and includes a capacitor C8 for filtering the rectified output of the rectifier circuit 22, thereby resulting in a stable DC voltage output.

The rechargeable battery cell 24 is connected across the filter circuit 23 so as to be charged by the DC voltage output of the latter.

When charging the battery cell 24 of the rechargeable battery device 20, the rechargeablebattery device 20 is placed adjacent to the charging device 10 such that the secondary induction coil 21 is juxtaposed with the primary induction coil 14. The DC power source 11 converts the external AC line input at the plug 111 into a DC voltage output, and the oscillator circuit 12 is driven by the DC voltage output so as to generate a pulse train output which is amplified by the driving circuit 13. The driving circuit 13 controls the flow of electric current through the primary induction coil 14, thereby resulting in a magnetic field which induces electric current in the secondary induction coil 21. The voltage across the secondary induction coil 21 is then rectified and filtered by the rectifier circuit 22 and the filter circuit 23, respectively, before being applied to the rechargeable battery cell 24 so as to charge the same.

Figure 3 illustrates an intended application of the rechargeable power supply of this invention. As illustrated, the rechargeable battery device 20 is incorporated in a wireless computer mouse 30, whereas the charging device 10 is provided on a charging base 40 for the computer mouse 30. The secondary induction coil 21 is formed as a planar spiral coil that is disposed on a bottom side of the computer mouse 30. The primary induction coil 14 is formed as a planar spiral coil that is disposed on a top side of the charging base 40. When charging the rechargeable battery device 20, the computer mouse 30 is placed on the charging base 40 such that the secondary induction coil 21 is juxtaposed with the primary induction coil 14.

It has thus been shown that the rechargeable power supply of the present invention does not incorporate electrical contacts, thereby overcoming the drawbacks of corrosion and deformation usually encountered in the prior art. The rechargeable power supply can be incorporated in different electrical products, particularly in wireless electrical products, such as remote control units.

Claims (16)

CLAIMS:
1. A method for charging a rechargeable battery device with a rechargeable battery cell, comprising the steps of: providing the rechargeable battery device with a secondary induction coil which is connected electrically to the rechargeable battery cell; and providing a charging device with a primary induction coil which is displaceable with respect to the secondary induction coil and which is capable of generating a magnetic field for inducing electric current in the secondary induction coil when the primary induction coil is juxtaposed with the secondary induction coil.
2. A rechargeable power supply, comprising: a rechargeable battery device which includes a rechargeable battery cell and a secondary induction coil connected electrically to said rechargeable battery cell; and a charging device which includes a primary induction coil that is displaceable with respect to said secondary induction coil and that is capable of generating a magnetic field for inducing electric current in said secondary induction coil when said primary induction coil is juxtaposed with said secondary induction coil.
3. The rechargeable power supply as claimed in Claim 2, wherein said rechargeable battery device further includes: a rectifier circuit connected electrically to said secondary induction coil for rectifying a voltage across said secondary induction coil; and a filter circuit connected electrically to said rectifier circuit for filtering output of said rectifier circuit.
4. The rechargeable power supply as claimed in Claim 2, wherein said charging device further includes: a DC power source for providing a DC voltage output; an oscillator circuit connected electrically to said DC power source and driven by the DC voltage output of said DC power source so as to generate a pulse train output; and a driving circuit connected electrically to said oscillator circuit and said primary induction coil, said driving circuit amplifying the pulse train output and controlling flow of electric current through said primary induction coil.
5. The rechargeable power supply as claimed in Claim 2, wherein said secondary induction coil is formed as a planar spiral coil.
6. The rechargeable power supply as claimed in Claim 2, wherein said primary induction coil is formed as a planar spiral coil.
7. A rechargeable battery device to be charged by a magnetic field that is generated by a primary induction coil of a charging device, said rechargeable battery device comprising a rechargeable battery cell and a secondary induction coil connected electrically to said rechargeable battery cell, said secondary induction coil being displaceable with respect to the primary induction coil, the magnetic field generated by the primary induction coil inducing electric current in said secondary induction coil when said secondary induction coil is juxtaposed with the primary induction coil.
8. The rechargeable battery device as claimed in Claim 7, further comprising: a rectifier circuit connected electrically to said secondary induction coil for rectifying a voltage across said secondary induction coil; and a filter circuit connected electrically to said rectifier circuit for filtering output of said rectifier circuit.
9. The rechargeable battery device as claimed in Claim 7, wherein said secondary induction coil is formed as a planar spiral coil.
10. A charging device for charging a rechargeable battery device which includes a secondary induction coil connected electrically to a rechargeable battery cell, said charging device comprising a primary induction coil which is displaceable with respect to the secondary induction coil and which is capable of generating a magnetic field for inducing electric current in the secondary induction coil when said primary induction coil is juxtaposed with the secondary induction coil.
11. The charging device as claimed in Claim 10, further comprising: a DC power source for providing a DC voltage output; an oscillator circuit connected electrically to said DC power source and driven by the DC voltage output of said DC power source so as to generate a pulse train output; and a driving circuit connected electrically to said oscillator circuit and said primary induction coil, said driving circuit amplifying the pulse train output and controlling flow of electric current through said primary induction coil.
12. The charging device as claimed in Claim 10, wherein said primary induction coil is formed as a planar spiral coil.
13. The method for charging a rechargeable battery device substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
14. The rechargeable power supply substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
15. The rechargeable battery device substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
16. The charging device substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
GB9612663A 1996-06-18 1996-06-18 Battery charging arrangement with inductively coupled charging device and rechargeable battery device Withdrawn GB2314470A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9612663A GB2314470A (en) 1996-06-18 1996-06-18 Battery charging arrangement with inductively coupled charging device and rechargeable battery device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9612663A GB2314470A (en) 1996-06-18 1996-06-18 Battery charging arrangement with inductively coupled charging device and rechargeable battery device

Publications (2)

Publication Number Publication Date
GB9612663D0 GB9612663D0 (en) 1996-08-21
GB2314470A true GB2314470A (en) 1997-12-24

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GB9612663A Withdrawn GB2314470A (en) 1996-06-18 1996-06-18 Battery charging arrangement with inductively coupled charging device and rechargeable battery device

Country Status (1)

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GB (1) GB2314470A (en)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001043063A1 (en) * 1999-12-06 2001-06-14 Soundtouch Limited. Inputting data
WO2002015320A1 (en) * 2000-08-16 2002-02-21 Inca Systems Co., Ltd. Battery charging system and battery charging apparatus thereof
EP1191429A2 (en) * 2000-09-19 2002-03-27 Tai-Her Yang Integrated mouse or trackball assembly
EP1197915A1 (en) * 2000-10-13 2002-04-17 Matthew Charles Harding computer mouse
EP1315051A1 (en) * 2001-11-26 2003-05-28 ETA SA Manufacture Horlogère Suisse Small electronic object that can be wrist worn
GB2388716A (en) * 2002-05-13 2003-11-19 Splashpower Ltd Contactless power transfer area
WO2003105308A1 (en) 2002-01-11 2003-12-18 City University Of Hong Kong Planar inductive battery charger
GB2393860A (en) * 2002-09-27 2004-04-07 Zap Wireless Technologies Ltd Variable positioning of devices being inductively charged
WO2005015374A1 (en) * 2003-08-12 2005-02-17 Creative Technology Ltd Alphanumeric keyboard with in built functional microphone
US6903725B2 (en) 2001-02-23 2005-06-07 Sabatino Nacson Self-powered cordless mouse
US6906495B2 (en) 2002-05-13 2005-06-14 Splashpower Limited Contact-less power transfer
US6960968B2 (en) * 2002-06-26 2005-11-01 Koninklijke Philips Electronics N.V. Planar resonator for wireless power transfer
WO2006033736A1 (en) * 2004-09-21 2006-03-30 Motorola Inc. Inductive charging pad with alignment indicator
US7158116B2 (en) 2003-04-04 2007-01-02 Drb Institute Llc Rechargeable cordless input and pointing device
CN1295575C (en) * 2001-11-26 2007-01-17 Eta草图制造公司 Small electronic object capable of worn on wrist
US7180503B2 (en) * 2001-12-04 2007-02-20 Intel Corporation Inductive power source for peripheral devices
DE102004045134B4 (en) * 2004-09-17 2007-08-02 Prigge, Maggie Computer mouse and computer system
AU2003233895B2 (en) * 2002-05-13 2008-09-25 Access Business Group International Llc Contact-less power transfer
US7688036B2 (en) 2006-06-26 2010-03-30 Battelle Energy Alliance, Llc System and method for storing energy
EP2262091A1 (en) * 2009-06-10 2010-12-15 Braun GmbH Device and method for inductive energy transfer
US8129942B2 (en) 2005-07-30 2012-03-06 Ls Cable & System Ltd. Contactless charging method for charging battery
US8159183B2 (en) 2006-01-31 2012-04-17 Ls Cable & System Ltd. Contact-less power supply, contact-less charger systems and method for charging rechargeable battery cell
US8305343B2 (en) 2004-09-30 2012-11-06 Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. Computer pointing device with motion-driven electromagnetic induction module
RU2488906C2 (en) * 2007-08-28 2013-07-27 Эксесс Бизнесс Груп Интернешнл Ллс Inductive power supply
US8749097B2 (en) * 2007-03-22 2014-06-10 Powermat Technologies, Ltd System and method for controlling power transfer across an inductive power coupling
US8917057B2 (en) 2002-06-10 2014-12-23 City University Of Hong Kong Battery charging system

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GB1570594A (en) * 1975-11-20 1980-07-02 Koehler Mfg Co Battery chargers
GB2094574A (en) * 1981-03-09 1982-09-15 Trisa Buerstenfabrik Ag Improvements in or relating to arrangements for charging storage batteries
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GB2185364A (en) * 1985-12-13 1987-07-15 Terence Henry Leather Communication system
GB2225197A (en) * 1988-11-18 1990-05-23 Marconi Electronic Devices Location monitoring of moveable objects
EP0552737A1 (en) * 1992-01-22 1993-07-28 Hughes Aircraft Company Weatherized curb-side charger

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1570594A (en) * 1975-11-20 1980-07-02 Koehler Mfg Co Battery chargers
GB2008869A (en) * 1977-11-15 1979-06-06 Microsource Corp Electrical energy conversion systems
GB2094574A (en) * 1981-03-09 1982-09-15 Trisa Buerstenfabrik Ag Improvements in or relating to arrangements for charging storage batteries
EP0171747A2 (en) * 1984-08-14 1986-02-19 Metaphor Computer Systems Cordless intelligent mouse
GB2185364A (en) * 1985-12-13 1987-07-15 Terence Henry Leather Communication system
GB2225197A (en) * 1988-11-18 1990-05-23 Marconi Electronic Devices Location monitoring of moveable objects
EP0552737A1 (en) * 1992-01-22 1993-07-28 Hughes Aircraft Company Weatherized curb-side charger

Cited By (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6891527B1 (en) 1999-12-06 2005-05-10 Soundtouch Limited Processing signals to determine spatial positions
US8436808B2 (en) 1999-12-06 2013-05-07 Elo Touch Solutions, Inc. Processing signals to determine spatial positions
WO2001043063A1 (en) * 1999-12-06 2001-06-14 Soundtouch Limited. Inputting data
WO2002015320A1 (en) * 2000-08-16 2002-02-21 Inca Systems Co., Ltd. Battery charging system and battery charging apparatus thereof
EP1191429A3 (en) * 2000-09-19 2005-12-07 Tai-Her Yang Integrated mouse or trackball assembly
EP1191429A2 (en) * 2000-09-19 2002-03-27 Tai-Her Yang Integrated mouse or trackball assembly
EP1197915A1 (en) * 2000-10-13 2002-04-17 Matthew Charles Harding computer mouse
WO2002031757A1 (en) * 2000-10-13 2002-04-18 Matthew Hercules Robinson Computer mouse
US6903725B2 (en) 2001-02-23 2005-06-07 Sabatino Nacson Self-powered cordless mouse
CN1295575C (en) * 2001-11-26 2007-01-17 Eta草图制造公司 Small electronic object capable of worn on wrist
US7175339B2 (en) 2001-11-26 2007-02-13 Eta Sa Fabriques D'ebauches Electronic object of small dimensions capable of being worn on the wrist
EP1315051A1 (en) * 2001-11-26 2003-05-28 ETA SA Manufacture Horlogère Suisse Small electronic object that can be wrist worn
US7180503B2 (en) * 2001-12-04 2007-02-20 Intel Corporation Inductive power source for peripheral devices
WO2003105308A1 (en) 2002-01-11 2003-12-18 City University Of Hong Kong Planar inductive battery charger
US7714537B2 (en) 2002-05-13 2010-05-11 Access Business Group International Llc Contact-less power transfer
US7863861B2 (en) 2002-05-13 2011-01-04 Access Business Group International Llc Contact-less power transfer
US7525283B2 (en) 2002-05-13 2009-04-28 Access Business Group International Llc Contact-less power transfer
US6906495B2 (en) 2002-05-13 2005-06-14 Splashpower Limited Contact-less power transfer
GB2388716A (en) * 2002-05-13 2003-11-19 Splashpower Ltd Contactless power transfer area
GB2388716B (en) * 2002-05-13 2004-10-20 Splashpower Ltd Improvements relating to contact-less power transfer
AU2003233895B2 (en) * 2002-05-13 2008-09-25 Access Business Group International Llc Contact-less power transfer
US7952324B2 (en) 2002-05-13 2011-05-31 Access Business Group International Llc Contact-less power transfer
EP2479866A3 (en) * 2002-06-10 2014-09-10 City University of Hong Kong Planar inductive battery charger
EP2685594A1 (en) * 2002-06-10 2014-01-15 City University of Hong Kong Planar inductive battery charger
EP1547222A1 (en) * 2002-06-10 2005-06-29 City University of Hong Kong Planar inductive battery charger
EP1547222A4 (en) * 2002-06-10 2011-01-26 Univ City Hong Kong Planar inductive battery charger
EP2479866A2 (en) * 2002-06-10 2012-07-25 City University of Hong Kong Planar inductive battery charger
US8917057B2 (en) 2002-06-10 2014-12-23 City University Of Hong Kong Battery charging system
US6960968B2 (en) * 2002-06-26 2005-11-01 Koninklijke Philips Electronics N.V. Planar resonator for wireless power transfer
GB2393860B (en) * 2002-09-27 2006-02-15 Zap Wireless Technologies Ltd Improvements relating to retention of rechargeable devices
US7518337B2 (en) 2002-09-27 2009-04-14 Access Business Group International Llc Retention of inductively rechargeable devices on an inductive charger
WO2004030176A3 (en) * 2002-09-27 2005-06-09 Splashpower Ltd Improvements relating to retention of rechargeable devices
GB2393860A (en) * 2002-09-27 2004-04-07 Zap Wireless Technologies Ltd Variable positioning of devices being inductively charged
WO2004030176A2 (en) * 2002-09-27 2004-04-08 Splashpower Limited Improvements relating to retention of rechargeable devices
US7158116B2 (en) 2003-04-04 2007-01-02 Drb Institute Llc Rechargeable cordless input and pointing device
WO2005015374A1 (en) * 2003-08-12 2005-02-17 Creative Technology Ltd Alphanumeric keyboard with in built functional microphone
US6935797B2 (en) 2003-08-12 2005-08-30 Creative Technology Limited Keyboard with built-in microphone
DE102004045134B4 (en) * 2004-09-17 2007-08-02 Prigge, Maggie Computer mouse and computer system
WO2006033736A1 (en) * 2004-09-21 2006-03-30 Motorola Inc. Inductive charging pad with alignment indicator
US7271569B2 (en) 2004-09-21 2007-09-18 Motorola Inc. Contact less charger with alignment indicator
US8305343B2 (en) 2004-09-30 2012-11-06 Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. Computer pointing device with motion-driven electromagnetic induction module
US8129942B2 (en) 2005-07-30 2012-03-06 Ls Cable & System Ltd. Contactless charging method for charging battery
US8159183B2 (en) 2006-01-31 2012-04-17 Ls Cable & System Ltd. Contact-less power supply, contact-less charger systems and method for charging rechargeable battery cell
US7688036B2 (en) 2006-06-26 2010-03-30 Battelle Energy Alliance, Llc System and method for storing energy
US8749097B2 (en) * 2007-03-22 2014-06-10 Powermat Technologies, Ltd System and method for controlling power transfer across an inductive power coupling
RU2488906C2 (en) * 2007-08-28 2013-07-27 Эксесс Бизнесс Груп Интернешнл Ллс Inductive power supply
EP2262091A1 (en) * 2009-06-10 2010-12-15 Braun GmbH Device and method for inductive energy transfer

Also Published As

Publication number Publication date
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