WO2008058557A1 - Battery charger - Google Patents

Battery charger Download PDF

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Publication number
WO2008058557A1
WO2008058557A1 PCT/EP2006/010948 EP2006010948W WO2008058557A1 WO 2008058557 A1 WO2008058557 A1 WO 2008058557A1 EP 2006010948 W EP2006010948 W EP 2006010948W WO 2008058557 A1 WO2008058557 A1 WO 2008058557A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
mobile
rechargeable
internal
mains
Prior art date
Application number
PCT/EP2006/010948
Other languages
French (fr)
Inventor
Sameer Shirgaonkar
Phillip Lindberg
Original Assignee
Nokia Corporation
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 Nokia Corporation filed Critical Nokia Corporation
Priority to PCT/EP2006/010948 priority Critical patent/WO2008058557A1/en
Publication of WO2008058557A1 publication Critical patent/WO2008058557A1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/46—Accumulators structurally combined with charging apparatus
    • 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
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • 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
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging
    • 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
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/40—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries adapted for charging from various sources, e.g. AC, DC or multivoltage
    • 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 to battery chargers, in particular to mobile battery chargers for charging a battery in an external mobile device. Further, the invention relates to a method of charging a battery in a mobile electronic device.
  • a mobile battery charger comprising a power converter with an A/C inlet and with a D/C outlet, a rechargeable internal battery coupled to the D/C outlet, and a connector for connecting the battery charger to a rechargeable external battery in an external device, the connector being
  • COMFJRft ⁇ ATJON COPY coupled to the rechargeable internal battery and to the D/C outlet.
  • a mobile user will only have to bring his/her mobile charger and will be able to recharge an empty battery in his/her mobile device even if there is currently no access to mains.
  • the coupling between the connector, the D/C outlet and the rechargeable internal battery is configured for charging the rechargeable internal battery and the rechargeable external battery simultaneously when the A/C inlet is connected to the mains, and the coupling between the connector, the D/C outlet and the rechargeable internal battery is configured for charging the rechargeable external battery from the rechargeable internal battery when the A/C inlet is not connected to the mains.
  • the internal battery will normally always be substantially fully charged and charging power is available even when there is currently no access to mains .
  • the A/C inlet can be adapted for receiving power from A/C mains .
  • the charger may comprise a housing containing the power converter and the internal rechargeable battery.
  • the internal battery may be user exchangeable. Thus, it is possible to swap the battery in the charger with the battery in the mobile device if the two batteries are compatible.
  • the connector may comprise a socket or plug.
  • the battery charger may be provided with a cable connected to the socket or plug.
  • the power converter may have a capacity sufficient for charging the internal battery and the external battery simultaneously.
  • the battery charger may further comprise a charge switching circuitry for delivering a charge to the internal battery under the control of a controller.
  • the controller may have a state detection logic for detecting the current state of the battery, and charging logic for charging the battery by selectively enabling and disabling the charge switching circuitry based on the condition of the battery.
  • the above problems are also overcome or at least reduced by providing a method for charging a battery in a mobile electronic device, comprising providing a mobile charger with a plug for connecting the mobile charge to the mains and with an internal rechargeable battery, connecting the mobile charger to the mobile electronic device with the plug inserted in the mains when a mains socket is currently available, and connecting the mobile charger to the mobile electronic device with the plug not inserted in the mains when no mains socket is currently available.
  • the internal battery in the external device and the internal battery in the mobile battery charger may be charged simultaneously when the plug of the mobile battery charger is inserted in the mains.
  • the internal battery in the external device can be charged by power from the internal battery in the mobile battery charger when the plug of the mobile battery charger is not inserted in the mains.
  • the mobile electronic device can be a mobile phone.
  • the above subject is also achieved by providing a method of charging a rechargeable battery with a mobile battery charger, comprising charging a rechargeable battery in an external device by coupling the mobile battery charger to the external device, providing power for charging operation said rechargeable battery in said external device from an internal rechargeable battery in the mobile charger when the mobile charger is not connected to the mains, providing power for charging said rechargeable battery in said external device from a power converter in said mobile battery charger when said mobile battery charger is connected to the mains, and providing power for charging said rechargeable battery in said mobile battery charger from said power converter in said mobile battery charger when said mobile battery charger is connected to the mains.
  • Fig. 1 is a front view of a mobile charger according to an embodiment of the invention connected to a mobile device
  • Fig. 2 is a front view of a mobile charger according to another embodiment of the invention.
  • Fig. 3 is a block diagram illustrating the general architecture of a mobile charger according to an embodiment of the invention and a mobile phone.
  • the charger according to the invention in the form of a mobile battery charger will be described by the preferred embodiments.
  • the mobile device containing a battery to be charged in the form of a mobile phone will also be described.
  • Fig. 1 illustrates a mobile battery charger 33.
  • the mobile battery charger 33 has a housing 37 from which two or more pins 39 of a plug for engaging a mains socket 50
  • the battery charger 33 is also provided with a cable 40 that leads a D/C charging current to a mobile phone 1 for charging a rechargeable battery in the mobile phone.
  • the free end of the cable 40 is provided with a plug 41 that engages a socket 31 (cf.
  • the mobile phone 1 comprises a user interface having a housing 2, a display 3, an on/off button (not shown), a speaker 5 (only the opening is shown) , and a microphone 6 (not visible in Fig. 1) .
  • the phone 1 according to the first preferred embodiment is adapted for communication via a cellular network, such as the GSM 900/1800 MHz network, but could just as well be adapted for use with a Code Division Multiple Access (CDMA) network, a 3G network, or a TCP/IP-based network to cover a possible VoIP-network (e.g. via WLAN, WIMAX or similar) or a mix of VoIP and Cellular such as UMA (Universal Mobile Access) .
  • CDMA Code Division Multiple Access
  • 3G Wireless Fidelity
  • TCP/IP-based network to cover a possible VoIP-network (e.g. via WLAN, WIMAX or similar) or a mix of VoIP and Cellular such as UMA (Universal Mobile Access) .
  • UMA Universal Mobile Access
  • the keypad 7 has a first group of keys 8 as alphanumeric keys.
  • the keypad 2 has additionally a second group of keys comprising two softkeys 9, two call handling keys (offhook key 11 and onhook key 12), and a 5-way navigation key 10.
  • a releasable rear cover (not shown) gives access to the SIM card (not shown) , and a rechargeable battery 24 (cf. Fig. 3) in the back of the mobile phone that supplies electrical power for the electronic components of the mobile phone 1.
  • the mobile phone 1 has a flat display 3.
  • Fig. 2 illustrates another embodiment of the mobile batter charger according to the invention.
  • the embodiment shown in Fig. 2 is essentially identical with the embodiment shown in Fig. 1, except that the internal battery 34 can be taken out of and placed back into the charger 33 by the user.
  • this embodiment has the advantage that the user can replace an empty battery in a mobile device with a fully loaded battery from the mobile charger 33.
  • Fig. 3 illustrates in block diagram form the general ar- chitecture of an embodiment of the charger 33 and of the mobile phone 1.
  • the processor 18 controls the operation of the terminal and has an integrated digital signal processor 17 and an integrated RAM 15.
  • the processor 18 controls the communication with the cellular network via the transmitter/receiver circuit 19 and an internal antenna 20.
  • a microphone 6 coupled to the processor 18 via voltage regulators 21 transforms the user's speech into analogue signals, the analogue signals formed thereby are A/D converted in an A/D converter (not shown) before the speech is encoded in the DSP 17 that is included in the processor 18.
  • the encoded speech signal is transferred to the processor 18, which e.g. supports the GSM terminal software.
  • the digital signal-processing unit 17 speech-decodes the signal, which is transferred from the processor 18 to the speaker 5 via a D/A converter (not shown) .
  • the voltage regulators 21 form the interface for the speaker 5, the microphone 6, the LED drivers 91 (for the LEDS backlighting the keypad 7 and the display 3) , the SIM card 22, battery 24, the bottom connector 27, the DC jack 31 (for connecting to the charger 33) and the audio amplifier 32 that drives the (hands-free) loudspeaker 25.
  • the processor 18 also forms the interface for some of the peripheral units of the device, including a (Flash) ROM memory 16, the graphical display 3 and the keypad 7.
  • the mobile in charger 33 includes a power converter 35 that is provided with an inlet that is connected to the plug 39 for the mains.
  • the power converter 35 transforms A/C power from the mains into lower voltage D/C power at its outlet.
  • the power converter 35 has an outlet that is connected to both the rechargeable internal battery 34 and to the cable 40 with plug 41.
  • the plug 41 can be inserted into the connector (DC jack socket 31) in the bottom of the mobile phone 1 to establish an electrical connection that leads the D/C charging current to the rechargeable battery 24 in the mobile phone 1.
  • the power converter 35 delivers charging current to the rechargeable internal battery 34 and to the cable
  • the power converter 35 is dimensioned with a capacity sufficient for charging the two batteries 24,34 at the same time.
  • the battery 34 in the mobile battery charger 34 delivers charging current to the battery 24 in the mobile phone 1.
  • the level to which the battery 24 in the mobile charger can charge the battery 24 in the mobile phone 1 depends on the relative size of the batteries, and their initial state of charge. With a fully charged internal battery 34 in the mobile battery charger 33, typically an empty at 324 in the mobile phone can be charged to approximately half of a full charge. This will provide the user of the mobile phone 1 with a significant amount of operating time of the mobile phone 1, in many cases enough to last until a mains socket becomes available.
  • the mobile battery charger includes charge switching circuitry for delivering a charge to the internal battery under the control of a controller.
  • the controller has state detection logic for detecting the current state of the battery, and charging logic for charging the battery by selectively enabling and disabling the charge switching circuitry based on the condition of the battery.

Abstract

A mobile battery charger (33) for charging a battery (24) of a mobile electronic device (1). The mobile battery charger (33) includes a power converter (35) with an inlet connectable to the mains and an outlet delivering D/C charging power. The mobile battery charger (33) further includes a rechargeable internal battery (34) coupled to the outlet and a connector for connecting the outlet of the power converter (35) to the mobile electronic device (1). When the mobile battery charger (33) is connected to the mains and to the mobile electronic device (1) the power converter (35) delivers charging current for the internal battery (34) in the mobile battery charger (33) and for the battery in the mobile electronic device (1). When mains are not currently available the internal battery (34) in the mobile battery charger (33) provides charging power for the battery (24) in the mobile electronic device (1).

Description

BATTERY CHARGER
FIELD OF THE INVENTION
The present invention relates to battery chargers, in particular to mobile battery chargers for charging a battery in an external mobile device. Further, the invention relates to a method of charging a battery in a mobile electronic device.
BACKGROUND OF THE INVENTION
With mobile phones providing ever greater functionality, they also get power hungry. With phone size also being an issue, growing battery volumes to give greater capacity are not desirable. In many cases, a ready spare battery is the only answer. The other option is to charge the battery of the mobile phone more often. However, this means that the mobile phone user has to carry a spare battery and/or have a charger with him/her and have access to mains.
DISCLOSURE OF THE INVENTION
On this background, it is an object of the present invention to provide a mobile battery charger that overcomes or at least reduces the problems indicated above. This object is achieved by providing a mobile battery charger comprising a power converter with an A/C inlet and with a D/C outlet, a rechargeable internal battery coupled to the D/C outlet, and a connector for connecting the battery charger to a rechargeable external battery in an external device, the connector being
COMFJRftøATJON COPY coupled to the rechargeable internal battery and to the D/C outlet.
Thus, a mobile user will only have to bring his/her mobile charger and will be able to recharge an empty battery in his/her mobile device even if there is currently no access to mains.
Preferably, the coupling between the connector, the D/C outlet and the rechargeable internal battery is configured for charging the rechargeable internal battery and the rechargeable external battery simultaneously when the A/C inlet is connected to the mains, and the coupling between the connector, the D/C outlet and the rechargeable internal battery is configured for charging the rechargeable external battery from the rechargeable internal battery when the A/C inlet is not connected to the mains.
Thus, the internal battery will normally always be substantially fully charged and charging power is available even when there is currently no access to mains .
The A/C inlet can be adapted for receiving power from A/C mains .
The charger may comprise a housing containing the power converter and the internal rechargeable battery.
The internal battery may be user exchangeable. Thus, it is possible to swap the battery in the charger with the battery in the mobile device if the two batteries are compatible. The connector may comprise a socket or plug.
The battery charger may be provided with a cable connected to the socket or plug.
The power converter may have a capacity sufficient for charging the internal battery and the external battery simultaneously.
The battery charger may further comprise a charge switching circuitry for delivering a charge to the internal battery under the control of a controller. The controller may have a state detection logic for detecting the current state of the battery, and charging logic for charging the battery by selectively enabling and disabling the charge switching circuitry based on the condition of the battery.
The above problems are also overcome or at least reduced by providing a method for charging a battery in a mobile electronic device, comprising providing a mobile charger with a plug for connecting the mobile charge to the mains and with an internal rechargeable battery, connecting the mobile charger to the mobile electronic device with the plug inserted in the mains when a mains socket is currently available, and connecting the mobile charger to the mobile electronic device with the plug not inserted in the mains when no mains socket is currently available.
In the method the internal battery in the external device and the internal battery in the mobile battery charger may be charged simultaneously when the plug of the mobile battery charger is inserted in the mains. In the method the internal battery in the external device can be charged by power from the internal battery in the mobile battery charger when the plug of the mobile battery charger is not inserted in the mains.
In the method the mobile electronic device can be a mobile phone.
The above subject is also achieved by providing a method of charging a rechargeable battery with a mobile battery charger, comprising charging a rechargeable battery in an external device by coupling the mobile battery charger to the external device, providing power for charging operation said rechargeable battery in said external device from an internal rechargeable battery in the mobile charger when the mobile charger is not connected to the mains, providing power for charging said rechargeable battery in said external device from a power converter in said mobile battery charger when said mobile battery charger is connected to the mains, and providing power for charging said rechargeable battery in said mobile battery charger from said power converter in said mobile battery charger when said mobile battery charger is connected to the mains.
Further objects, features, advantages and properties of the mobile battery charger and method of according to the invention will become apparent from the detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
In the following detailed portion of the present description, the invention will be explained in more detail with reference to the exemplary embodiments shown in the drawings, in which:
Fig. 1 is a front view of a mobile charger according to an embodiment of the invention connected to a mobile device,
Fig. 2 is a front view of a mobile charger according to another embodiment of the invention, and
Fig. 3 is a block diagram illustrating the general architecture of a mobile charger according to an embodiment of the invention and a mobile phone.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
In the following detailed description, the charger according to the invention in the form of a mobile battery charger, will be described by the preferred embodiments. The mobile device containing a battery to be charged in the form of a mobile phone will also be described.
Fig. 1 illustrates a mobile battery charger 33. The mobile battery charger 33 has a housing 37 from which two or more pins 39 of a plug for engaging a mains socket 50
(A/C, typically 110 or 240 V) . The battery charger 33 is also provided with a cable 40 that leads a D/C charging current to a mobile phone 1 for charging a rechargeable battery in the mobile phone. The free end of the cable 40 is provided with a plug 41 that engages a socket 31 (cf.
Fig. 3) in the mobile phone 1. The mobile phone 1 comprises a user interface having a housing 2, a display 3, an on/off button (not shown), a speaker 5 (only the opening is shown) , and a microphone 6 (not visible in Fig. 1) . The phone 1 according to the first preferred embodiment is adapted for communication via a cellular network, such as the GSM 900/1800 MHz network, but could just as well be adapted for use with a Code Division Multiple Access (CDMA) network, a 3G network, or a TCP/IP-based network to cover a possible VoIP-network (e.g. via WLAN, WIMAX or similar) or a mix of VoIP and Cellular such as UMA (Universal Mobile Access) .
The keypad 7 has a first group of keys 8 as alphanumeric keys. The keypad 2 has additionally a second group of keys comprising two softkeys 9, two call handling keys (offhook key 11 and onhook key 12), and a 5-way navigation key 10. A releasable rear cover (not shown) gives access to the SIM card (not shown) , and a rechargeable battery 24 (cf. Fig. 3) in the back of the mobile phone that supplies electrical power for the electronic components of the mobile phone 1.
The mobile phone 1 has a flat display 3.
Fig. 2 illustrates another embodiment of the mobile batter charger according to the invention. The embodiment shown in Fig. 2 is essentially identical with the embodiment shown in Fig. 1, except that the internal battery 34 can be taken out of and placed back into the charger 33 by the user. In this embodiment has the advantage that the user can replace an empty battery in a mobile device with a fully loaded battery from the mobile charger 33.
Fig. 3 illustrates in block diagram form the general ar- chitecture of an embodiment of the charger 33 and of the mobile phone 1.
In the mobile phone the processor 18 controls the operation of the terminal and has an integrated digital signal processor 17 and an integrated RAM 15. The processor 18 controls the communication with the cellular network via the transmitter/receiver circuit 19 and an internal antenna 20. A microphone 6 coupled to the processor 18 via voltage regulators 21 transforms the user's speech into analogue signals, the analogue signals formed thereby are A/D converted in an A/D converter (not shown) before the speech is encoded in the DSP 17 that is included in the processor 18. The encoded speech signal is transferred to the processor 18, which e.g. supports the GSM terminal software. The digital signal-processing unit 17 speech-decodes the signal, which is transferred from the processor 18 to the speaker 5 via a D/A converter (not shown) .
The voltage regulators 21 form the interface for the speaker 5, the microphone 6, the LED drivers 91 (for the LEDS backlighting the keypad 7 and the display 3) , the SIM card 22, battery 24, the bottom connector 27, the DC jack 31 (for connecting to the charger 33) and the audio amplifier 32 that drives the (hands-free) loudspeaker 25.
The processor 18 also forms the interface for some of the peripheral units of the device, including a (Flash) ROM memory 16, the graphical display 3 and the keypad 7. The mobile in charger 33 includes a power converter 35 that is provided with an inlet that is connected to the plug 39 for the mains. The power converter 35 transforms A/C power from the mains into lower voltage D/C power at its outlet. The power converter 35 has an outlet that is connected to both the rechargeable internal battery 34 and to the cable 40 with plug 41. The plug 41 can be inserted into the connector (DC jack socket 31) in the bottom of the mobile phone 1 to establish an electrical connection that leads the D/C charging current to the rechargeable battery 24 in the mobile phone 1.
When the mobile battery charger 33 is connected to the mains, the power converter 35 delivers charging current to the rechargeable internal battery 34 and to the cable
40. When the cable 40 is connected to the mobile phone 1 the rechargeable battery 24 in the mobile phone 1 will be charged simultaneously with the rechargeable battery 34 in the mobile battery charger 33. The power converter 35 is dimensioned with a capacity sufficient for charging the two batteries 24,34 at the same time.
When the mobile battery charger 33 is not connected to the mains, the battery 34 in the mobile battery charger 34 delivers charging current to the battery 24 in the mobile phone 1. The level to which the battery 24 in the mobile charger can charge the battery 24 in the mobile phone 1 depends on the relative size of the batteries, and their initial state of charge. With a fully charged internal battery 34 in the mobile battery charger 33, typically an empty at 324 in the mobile phone can be charged to approximately half of a full charge. This will provide the user of the mobile phone 1 with a significant amount of operating time of the mobile phone 1, in many cases enough to last until a mains socket becomes available.
According to another embodiment (not shown) the mobile battery charger includes charge switching circuitry for delivering a charge to the internal battery under the control of a controller. The controller has state detection logic for detecting the current state of the battery, and charging logic for charging the battery by selectively enabling and disabling the charge switching circuitry based on the condition of the battery.
The term "comprising" as used in the claims does not exclude other elements or steps. The term "a" or "an" as used in the claims does not exclude a plurality.
Although the present invention has been described in detail for purpose of illustration, it is understood that such detail is solely for that purpose, and variations can be made therein by those skilled in the art without departing from the scope of the invention.

Claims

CLAIMS :
1. A mobile battery charger comprising:
a power converter with an A/C inlet and with a D/C outlet,
a rechargeable internal battery coupled to said D/C outlet, and
a connector for connecting said battery charger to a rechargeable external battery in an external device,
said connector being coupled to said rechargeable internal battery and to said D/C outlet.
2. A mobile battery charger according to claim 1, wherein said coupling between said connector, said D/C outlet and said rechargeable internal battery is configured for charging said rechargeable internal battery and said rechargeable external battery simultaneously when said A/C inlet is connected to the mains, and said coupling between said connector, said D/C outlet and said rechargeable internal battery is configured for charging said rechargeable external battery from said rechargeable internal battery when said A/C inlet is not connected to the mains.
3. A mobile battery charger according to claim 2, wherein said A/C inlet is adapted for receiving power from A/C mains .
4. A mobile battery charger according to claim 1, comprising a housing containing said power converter and said internal rechargeable battery.
5. A mobile battery charger according to claim 1, wherein said internal battery is user exchangeable.
6. A mobile battery charger according to claim 1, wherein said connector comprises a socket or plug.
7. A mobile battery charger according to claim 4, further comprising a cable connected to said socket or plug.
8. A mobile battery charger according to claim 1, wherein said power converter has a capacity sufficient for charging said internal battery and said external battery simultaneously.
9. A mobile battery charger according to claim 1, further comprising charge switching circuitry for delivering a charge to the internal battery under the control of a controller.
10. A mobile battery charger according to claim 9, wherein the controller has state detection logic for detecting the current state of the battery, and charging logic for charging the battery by selectively enabling and disabling the charge switching circuitry based on the condition of the battery.
11. A mobile battery charger according to claim 1, comprising a housing containing said power converter and said internal rechargeable battery and wherein said power converter has a capacity sufficient for charging said internal battery and said external battery simultaneously.
12. A mobile battery charger according to claim 1, wherein said coupling between said connector, said D/C outlet and said rechargeable internal battery is configured for charging said rechargeable internal battery and said rechargeable external battery simultaneously when said A/C inlet is connected to the mains, and said coupling between said connector, said D/C outlet and said rechargeable internal battery is configured for charging said rechargeable external battery from said rechargeable internal battery when said A/C inlet is not connected to the mains, and wherein said power converter has a capacity sufficient for charging said internal battery and said external battery simultaneously.
13. A method for charging a battery in a mobile electronic device, comprising:
providing a mobile battery charger with a plug for connecting the mobile charge to the mains and with an internal rechargeable battery,
connecting said mobile battery charger to the mobile electronic device with said plug inserted in the mains when a mains socket is currently available,
and connecting said mobile battery charger to the mobile electronic device with said plug not inserted in the mains when no mains socket is currently available .
14. A method according to claim 13, wherein said internal battery in said external device and said internal battery in the mobile battery charger are charged simultaneously when the plug of the mobile battery charger is inserted in the mains.
15. A method according to claim 13, wherein said internal battery in said external device is charged by power from said internal battery in the mobile battery charger when the plug of the mobile battery charger is not inserted in the mains.
16. A method according to claim 13, wherein said mobile electronic device is a mobile phone.
17. A method of charging a rechargeable battery with a mobile battery charger, comprising:
charging a rechargeable battery in an external ■ device by coupling the mobile battery charger to the external device,
providing power for charging said rechargeable battery in said external device from an internal rechargeable battery in the mobile charger when the mobile charger is not connected to the mains,
providing power for charging said rechargeable battery in said external device from a power converter in said mobile battery charger when said mobile battery charger is connected to the mains, and providing power for charging said rechargeable battery in said mobile battery charger from said power converter in said mobile battery charger when said mobile battery charger is connected to the mains .
PCT/EP2006/010948 2006-11-15 2006-11-15 Battery charger WO2008058557A1 (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Country Link
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Cited By (2)

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Publication number Priority date Publication date Assignee Title
US8841798B2 (en) 2011-12-02 2014-09-23 Navteq B.V. Method, apparatus for emergency power supply and device associated thereto
CN106992326A (en) * 2017-04-19 2017-07-28 深圳天珑无线科技有限公司 A kind of charge control method, device and electronic equipment

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