WO2008151643A1 - Apparatus for battery charging and method of charging a battery - Google Patents
Apparatus for battery charging and method of charging a battery Download PDFInfo
- Publication number
- WO2008151643A1 WO2008151643A1 PCT/EP2007/005170 EP2007005170W WO2008151643A1 WO 2008151643 A1 WO2008151643 A1 WO 2008151643A1 EP 2007005170 W EP2007005170 W EP 2007005170W WO 2008151643 A1 WO2008151643 A1 WO 2008151643A1
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- WIPO (PCT)
- Prior art keywords
- current
- electronic device
- portable electronic
- circuitry
- regulating
- Prior art date
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Classifications
-
- 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
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
Definitions
- the present invention relates to apparatus for batter)' charging of a portable electronic device, and to a device for charging such a battery, and to a method of charging such a batter)'.
- Batter Batter' capacity is often abbreviated as the letter C, and references are made for example to 1/20 C or C/20.
- a 600 mAh battery will give 600mA for one hour, 60 mA for 10 hours, or 6mA for 100 hours. In practice, at high currents, the rated capacity is never quite reached; at low currents, it is exceeded.
- a rate of 1/10 C means a charging current of one tenth of the battery stated capacity.
- a trickle charge at 1/10 C is usually safe for any battery.
- a preferred method of charging both NiCd and NiMH batteries is the so called delta-V (change in voltage) method.
- the terminal voltage of the cell during a charge with a constant current continues to rise slowly as charging progresses. At the point of full charge, the cell voltage drops in a short time. The amount of drop is small, about 10 mV/cell for NiCd (lower for NiMH), but is distinctive. Delta charging is nearly always allied with temperature measurement as a backup.
- an initial charge rate of 1 C is used and. when the fully charged state has been reached, a maintenance charge of 1/30 to 1/50 C is used to maintain the battery.
- Another approach is to measure the cell temperature.
- the cell temperature will rise steeply as full charge is reached. When the cell temperature rises to 10° C or so above ambient, it will stop charging, or go into trickle mode.
- One particular problem with many phones is that, when used in cars, the amount of noise and interference on the car supply can defeat or mask the delta V detection and phones are more prone to operating on temperature limiting. While this has no significant effect in occasional use. it can lead to a loss of battery life in vehicles when the phone is permanently connected (e.g. a car kit) and a lot of stop/start motoring takes place. Each time the ignition is turned off for a few minutes and then turned back on, a new charge sequence is initiated.
- the term "portable electronic device” is used to indicate any electrical or electronic device or unit which is suitable for carrying by a human, and for example includes a mobile communication device or smart mobile phone, a personal digital assistant unit or laptop/tablet PC, a personal music player or mp3 player or digital/analogue radio, a games or other entertainment unit, a navigation device for example a satellite navigation unit, or a data storage unit.
- An object of the present invention may be to provide apparatus for charging a portable electronic device which may overcome any one or more of the problems referred to herein.
- Another object of the present invention may be to provide apparatus for charging a portable device at a predetermined magnitude.
- apparatus for charging a portable electronic device comprising circuitry for dynamically regulating the current from a charger to the portable electronic device so that the current to the battery of the portable electronic device is at a magnitude independent of the current drawn by other operations of the portable electronic device.
- the apparatus may allow for charging of the batter ⁇ ' at a consistent magnitude, advantageously at an optimum level, regardless of other operations of the portable electronic device. Moreover the charging can be maintained at a high level without risk of intermittent excessive charge levels.
- the apparatus may include any one or more of the following features:
- circuitry for regulating is operable to provide a predetermined magnitude current being input to the battery of the portable electronic device
- the circuitry for regulating comprises circuitry for determining the current drawn by said other operations to provide control of the current from the charger to the portable electronic device;
- the circuitry for determining the drawn current comprises circuitry to measure the current consumption at all said other operations of the portable electronic device, and circuitry for summing the current measurements derived from the circuitry to measure the current consumption;
- the circuitry for regulating comprises circuitry for adding to combine the output of said circuitry for summing with the batter)' current input, to derive the charger current to the portable electronic device;
- circuitry for determining the current drawn is operable such that the current drawn by said other operations are measured over a predetermined time period and/or at predetermined time intervals;
- circuitry for determining the current drawn is operable such that the measurements are substantially instantaneous and/or continual;
- circuit ⁇ for sensing the current to the batter ⁇ ' of the portable electronic device for input to the circuitry for regulating
- the circuitry for sensing comprises a current-sensing resistor in series with the battery; • circuitry to measure voltage drop across the current-sensing resistor for input to the circuitry for regulating;
- circuitry for current sensing is operable such that the current measurements are made over a predetermined time period and/or at predetermined time intervals; • the circuitry for current sensing is operable such that the measurements are substantially instantaneous and/or continual.
- a device for charging a portable electronic device comprising apparatus of the first aspect.
- a method of charging a portable electronic device comprising dynamically regulating the current from a charger to the portable electronic device so that the current being input to the battery of the portable electronic device is at a magnitude independent of the current drawn by other operations of the portable electronic device.
- the method may include any one or more of the following features:
- the regulating inputs a predetermined magnitude current to the batter)' of the portable electronic device; • the regulating comprises determining current drawn by said other operations for control of the current from the charger to the portable electronic device;
- the determining comprises measuring the current consumption at all said other operations of the portable electronic device, and summing the current measurements derived from the measuring;
- the regulating comprises combining the output of said summing with the battery current input for derivation of the charger current to the portable electronic device;
- the current determining comprises measuring the current drawn by said other operations over a predetermined time period and/or at predetermined time intervals;
- the sensing comprises measuring the voltage drop across a current- sensing resistor in series with the batter ⁇ ' for input to the circuitry for regulating;
- the current sensing makes the current measurements over a predetermined time period and/or at predetermined time intervals; • the current sensing makes the measurements substantially instantaneous and/or continual.
- an apparatus for charging a portable electronic device comprising means for dynamically regulating the current from a charger to the portable electronic device so that the current being input to the battery of the portable electronic device is at a magnitude independent of the current drawn by other operations of the portable electronic device.
- a computer program e.g. stored on a memory
- the computer program comprising computer code for dynamically regulating the current from a charger to the portable electronic device so that the current being input to the battery of the portable electronic device is at a magnitude independent of the current drawn by other operations of the portable electronic device.
- the charger regulating function may be located within the charger unit, or within the portable electronic device, or separately, or elsewhere, as appropriate.
- Any circuitry may include one or more processors, memories, and bus lines. One or more of the circuitries may share circuitry elements.
- the present invention includes one or more aspects, embodiments and/or features of said aspects and/or embodiments in isolation and/or in various combinations whether or nor specifically stated (including claimed) in that combination or in isolation.
- Corresponding means for performing one or more of the disclosed functions are also within the present disclosure.
- charging of the battery may be set at an optimum rate allowing efficient, fast affective charging
- charging of the battery may be maintained at or near a maximum rate without risk of exceeding the maximum rate upon variation of other operations of the portable electronic device.
- FIG. 1 is a block schematic drawing of one embodiment of an apparatus embodying the present invention
- Figure 2 is a block schematic drawing of a second embodiment of the present invention.
- FIG 1 there is shown a mobile phone charger 1 , plugged into a mobile phone 2. by way of a USB terminal 3 at the mobile phone 2.
- Mobile phone 2 has a number of internal functionality block circuits, these including:
- Charger 1 has a supply unit 10 connected in series to a dynamic control unit 11 which regulates the current output of the charger 1.
- Control unit 11 operates by determining the instantaneous current consumption Ij to I 7 at each of the circuits 5 to 7, summing them and then adding the required battery charging current I 4 , which typically in the beneficial mode is 1C being the maximum permitted charging current, in order to result in the total current I ⁇ N from supply circuit 10.
- FIG. 2 there is shown a second embodiment in which charger 21 is plugged into a USB terminal 22 (acting as a USB charging connector) of mobile phone 23.
- control unit 28 Between USB terminal 22 and the individual functionality circuits of the mobile phone 23 (being battery circuit 24, RF circuit 25, LED circuit 26. video circuit 27) is control unit 28.
- a current sensing resistor 29 is located in series connection with the batter ⁇ 7 unit 30 of battery circuit 24. allowing the voltage drop across resistor 29 to be continuously monitored by the generation of a signal which is input to control unit 28 for dynamic regulation of the current I JN being input to mobile phone 23 from charger 21.
Abstract
Charger (1) is plugged into mobile phone (2) by way of USB terminal (3). Charger (1) has a dynamic control unit (11) to regulate the current output to provide optimum charging current to battery circuit (4) for any current drawn from other functionality circuits of mobile phone (2). Dynamic control unit determines current consumption at functionality circuits (5) to (7), summing them with the required charging current for the battery.
Description
APPARATUS FOR BATTERY CHARGING AND METHOD OF CHARGLNG A BATTERY
The present invention relates to apparatus for batter)' charging of a portable electronic device, and to a device for charging such a battery, and to a method of charging such a batter)'.
Background of the Invention
Conventional mobile phone batter)' chargers have up to three different modes of charging being: -
• Standard charging - at 1/1 Oth of the batteries capacity for about 15 hours;
• Rapid Charging - at about 1/3 of the batteries capacity for about 5 hours; • Quick Charging (or Delta V Charging) where the barter)' state is measured and charging is terminated when complete, typically about 1 hour.
Batter)' capacity is often abbreviated as the letter C, and references are made for example to 1/20 C or C/20. When referring to a discharge rate of 1/10 C or C/10, it means that the discharge rate is one tenth of the battery rated capacity. For a 600 mAh hour battery, this would be 600/10=60mA. In theory, a 600 mAh battery will give 600mA for one hour, 60 mA for 10 hours, or 6mA for 100 hours. In practice, at high currents, the rated capacity is never quite reached; at low currents, it is exceeded.
Similarly for charging, a rate of 1/10 C means a charging current of one tenth of the battery stated capacity. A trickle charge at 1/10 C is usually safe for any battery.
Standard Charging (or trickle charging)
This involves using a current of about 50 mA (for AA cells) and leaving them on charge for 15 hours. At this current level, oxygen diffusion is more than enough to
take care of the excess current once full charge is achieved. For example, the charging current is maintained at a constant 0.1 C for 16 hours.
Fast Charging
This is variation of trickle charging in which a charging current of 0.3 to l .OC is used. It is essential that the battery is discharged fully before charging so such chargers often start with a discharge cycle to get the battery to a known state of charge. For example a rate of 1/3 C is maintained for 4 to 5 hours. This charging method has a tendency to overheat batteries, especially when charging current of 1 C are used.
Delta V Charging
A preferred method of charging both NiCd and NiMH batteries is the so called delta-V (change in voltage) method. The terminal voltage of the cell during a charge with a constant current continues to rise slowly as charging progresses. At the point of full charge, the cell voltage drops in a short time. The amount of drop is small, about 10 mV/cell for NiCd (lower for NiMH), but is distinctive. Delta charging is nearly always allied with temperature measurement as a backup.
For example, an initial charge rate of 1 C is used and. when the fully charged state has been reached, a maintenance charge of 1/30 to 1/50 C is used to maintain the battery.
One disadvantage with this charging mode is that, in a battery with a bad cell, this method may not work, and one may end up destroying all the cells.
Another approach is to measure the cell temperature. The cell temperature will rise steeply as full charge is reached. When the cell temperature rises to 10° C or so above ambient, it will stop charging, or go into trickle mode.
One particular problem with many phones is that, when used in cars, the amount of noise and interference on the car supply can defeat or mask the delta V detection and phones are more prone to operating on temperature limiting. While this has no significant effect in occasional use. it can lead to a loss of battery life in vehicles when the phone is permanently connected (e.g. a car kit) and a lot of stop/start motoring takes place. Each time the ignition is turned off for a few minutes and then turned back on, a new charge sequence is initiated.
Another problem concerning conventional mobile chargers is that, when the mobile is in use in a high-consuming mode (for example in a video call mode), then the majority of the current from the charger is needed to maintain merely the video functionality and the other basic functionalities, to the detriment of the charge current passing to the battery which is therefore substantially reduced from the normal level or the preferred level.
This difficulty cannot be overcome by increasing the charger output current, because of the danger of the barter}' input current exceeding acceptable levels when there is only low-consumption modes in use.
The listing or discussion of a prior-published document in this specification should not necessarily be taken as an acknowledgement that the document is part of the state of the art or is common general knowledge.
In the patent specification, the term "portable electronic device" is used to indicate any electrical or electronic device or unit which is suitable for carrying by a human, and for example includes a mobile communication device or smart mobile phone, a personal digital assistant unit or laptop/tablet PC, a personal music player or mp3 player or digital/analogue radio, a games or other entertainment unit, a navigation device for example a satellite navigation unit, or a data storage unit.
Objects
An object of the present invention may be to provide apparatus for charging a portable electronic device which may overcome any one or more of the problems referred to herein.
Another object of the present invention may be to provide apparatus for charging a portable device at a predetermined magnitude.
Summary
According to a first aspect, there is provided apparatus for charging a portable electronic device, the apparatus comprising circuitry for dynamically regulating the current from a charger to the portable electronic device so that the current to the battery of the portable electronic device is at a magnitude independent of the current drawn by other operations of the portable electronic device.
In this way, the apparatus may allow for charging of the batter}' at a consistent magnitude, advantageously at an optimum level, regardless of other operations of the portable electronic device. Moreover the charging can be maintained at a high level without risk of intermittent excessive charge levels.
The apparatus may include any one or more of the following features:
• the circuitry for regulating is operable to provide a predetermined magnitude current being input to the battery of the portable electronic device;
• the circuitry for regulating comprises circuitry for determining the current drawn by said other operations to provide control of the current from the charger to the portable electronic device;
• the circuitry for determining the drawn current comprises circuitry to measure the current consumption at all said other operations of the portable electronic device, and circuitry for summing the current
measurements derived from the circuitry to measure the current consumption;
• the circuitry for regulating comprises circuitry for adding to combine the output of said circuitry for summing with the batter)' current input, to derive the charger current to the portable electronic device;
• the circuitry for determining the current drawn is operable such that the current drawn by said other operations are measured over a predetermined time period and/or at predetermined time intervals;
• the circuitry for determining the current drawn is operable such that the measurements are substantially instantaneous and/or continual;
• circuit^ for sensing the current to the batter}' of the portable electronic device for input to the circuitry for regulating;
• the circuitry for sensing comprises a current-sensing resistor in series with the battery; • circuitry to measure voltage drop across the current-sensing resistor for input to the circuitry for regulating;
• the circuitry for current sensing is operable such that the current measurements are made over a predetermined time period and/or at predetermined time intervals; • the circuitry for current sensing is operable such that the measurements are substantially instantaneous and/or continual.
According to a second aspect, there is also provided a device for charging a portable electronic device, the device comprising apparatus of the first aspect.
According to a third aspect, there is also provided a method of charging a portable electronic device, the method comprising dynamically regulating the current from a charger to the portable electronic device so that the current being input to the battery of the portable electronic device is at a magnitude independent of the current drawn by other operations of the portable electronic device.
The method may include any one or more of the following features:
• the regulating inputs a predetermined magnitude current to the batter)' of the portable electronic device; • the regulating comprises determining current drawn by said other operations for control of the current from the charger to the portable electronic device;
• the determining comprises measuring the current consumption at all said other operations of the portable electronic device, and summing the current measurements derived from the measuring;
• the regulating comprises combining the output of said summing with the battery current input for derivation of the charger current to the portable electronic device;
• the current determining comprises measuring the current drawn by said other operations over a predetermined time period and/or at predetermined time intervals;
• the current determining comprising making measurements that are substantially instantaneous and/or continual;
• sensing current to the battery of the portable electronic device for the regulating;
• the sensing comprises measuring the voltage drop across a current- sensing resistor in series with the batter}' for input to the circuitry for regulating;
• the current sensing makes the current measurements over a predetermined time period and/or at predetermined time intervals; • the current sensing makes the measurements substantially instantaneous and/or continual.
In a fourth aspect, there is provided an apparatus for charging a portable electronic device, the apparatus comprising means for dynamically regulating the current from a charger to the portable electronic device so that the current being input to the battery of the portable electronic device is at a magnitude independent of the current drawn by other operations of the portable electronic device.
In a fifth aspect, there is provided a computer program (e.g. stored on a memory) for an apparatus for charging a portable electronic device, the computer program comprising computer code for dynamically regulating the current from a charger to the portable electronic device so that the current being input to the battery of the portable electronic device is at a magnitude independent of the current drawn by other operations of the portable electronic device.
The charger regulating function may be located within the charger unit, or within the portable electronic device, or separately, or elsewhere, as appropriate.
Any circuitry may include one or more processors, memories, and bus lines. One or more of the circuitries may share circuitry elements.
The present invention includes one or more aspects, embodiments and/or features of said aspects and/or embodiments in isolation and/or in various combinations whether or nor specifically stated (including claimed) in that combination or in isolation. Corresponding means for performing one or more of the disclosed functions are also within the present disclosure.
Advantages
It will be appreciated that one or more of the described embodiment may provide at least one more of the following advantages:
• charging of the battery may be maintained at a predetermined rate regardless of other operations of the portable electronic device;
• charging of the battery may be set at an optimum rate allowing efficient, fast affective charging;
• charging of the battery may be maintained at or near a maximum rate without risk of exceeding the maximum rate upon variation of other operations of the portable electronic device.
Brief Description of the Figures
A description is now given, by way of example only, reference being made to the accompanying drawings in which:
Figure 1 is a block schematic drawing of one embodiment of an apparatus embodying the present invention;
Figure 2 is a block schematic drawing of a second embodiment of the present invention.
Specific Embodiments
In Figure 1, there is shown a mobile phone charger 1 , plugged into a mobile phone 2. by way of a USB terminal 3 at the mobile phone 2.
Mobile phone 2 has a number of internal functionality block circuits, these including:
• batter}' circuit 4 for input to and output from the battery;
• RF circuit 5 for radio frequency communication of the mobile phone;
• LEDs circuit 6 for operation and powering of the mobile phone keys; • video circuit 7 for handling video transmissions.
The instantaneous current drawn by each circuit 4 to 7 at any time is given by I4 to I7 respectively. (It will be appreciated that other portable electronic devices may comprise different combination or different/additional block circuits to those shown in Figure 1.)
Charger 1 has a supply unit 10 connected in series to a dynamic control unit 11 which regulates the current output of the charger 1.
Control unit 11 operates by determining the instantaneous current consumption Ij to I7 at each of the circuits 5 to 7, summing them and then adding the required battery charging current I4, which typically in the beneficial mode is 1C being the
maximum permitted charging current, in order to result in the total current IΓN from supply circuit 10.
In Figure 2. there is shown a second embodiment in which charger 21 is plugged into a USB terminal 22 (acting as a USB charging connector) of mobile phone 23.
Between USB terminal 22 and the individual functionality circuits of the mobile phone 23 (being battery circuit 24, RF circuit 25, LED circuit 26. video circuit 27) is control unit 28. A current sensing resistor 29 is located in series connection with the batter}7 unit 30 of battery circuit 24. allowing the voltage drop across resistor 29 to be continuously monitored by the generation of a signal which is input to control unit 28 for dynamic regulation of the current IJN being input to mobile phone 23 from charger 21.
The arrangement of Figure 2 allows the dynamic regulation of the charging current without the need to determine the instantaneous current consumption at the functionality circuits 25 to 27.
The applicant hereby discloses in isolation each individual feature described herein and any combination of two or more such features, to the extent that such features or combinations are capable of being carried out based on the present specification as a whole in the light of the common general knowledge of a person skilled in the art, irrespective of whether such features or combinations of feature solve any problems disclosed herein, and without limitation to the scope of the claims. The applicant indicates that aspects of the present invention may consist of any such individual feature or combination of features. In view of the foregoing description, it will be evident to a person skilled in the art that various modifications may be made within the scope of the invention.
While there have been shown and described and pointed out fundamental novel features of the invention as applied to preferred embodiments thereof, it will be understood that various omissions and substitutions and changes in the form and details of the devices and methods described may be made by those skilled in the art without departing from the spirit of the invention. For example, it is expressly
intended that all combinations of those elements and/or method steps which perform substantially the same function in substantially the same way to achieve the same results are within the scope of the invention.
Moreover, it should be recognised that structures, and/or elements and/or method steps shown and/or described in connection with any disclosed form or embodiment of the invention may be incorporated in any other disclosed or described or suggested form or embodiment as a general matter of design choice. It is the intention, therefore, to be limited only as indicated by the scope of the claims appended hereto. Furthermore, in the claims means-plus-function clauses are intended to cover the structures described herein as performing the recited function and not only structural equivalents, but also equivalent structures. Thus although a nail and screw may not be structural equivalents in that a nail employs a cylindrical surface to secure wooden part together, whereas a screw employs a helical surface, in the environment of fastening wooden parts, a nail and a screw may be equivalent structures.
Claims
1. Apparatus for charging a portable electronic device, the apparatus comprising circuitry for dynamically regulating the current from a charger to the portable electronic device so that the current being input to the batter)' of the portable electronic device is at a magnitude independent of the current drawn by other operations of the portable electronic device.
2. Apparatus according to Claim 1. wherein the circuitry for regulating is operable to provide a predetermined magnitude current being input to the batter}' of the portable electronic device.
3. Apparatus according to Claim 1 or 2 wherein the circuitry for regulating comprises circuitry for determining the current drawn by said other operations to provide control of the current from the charger to the portable electronic device.
4. Apparatus according to Claim 3 wherein the circuitry for current determination comprises circuitry for measuring the current consumption at all said other operations of the portable electronic device, and circuitry for summing to sum the current measurements derived from the circuitry for measuring current.
5. Apparatus according to Claims 3 and 4 wherein the circuitry for regulating comprises means for adding to combine the output of said circuitry for summing with the battery current input, to derive the charger current to the portable electronic device.
6. Apparatus according to any of Claims 3 to 5 wherein the circuitry for current determination is operable such that the current drawn by said other operations are measured over a predetermined time period and/or at predetermined time intervals.
7. Apparatus according to Claim 6 wherein the circuitry for current determination is operable such that the measurements are substantially instantaneous and/or continual.
8. Apparatus according to Claim 1 or 2 comprising: circuitry for sensing current to the batter}' of the portable electronic device for input to the circuitry' for regulating.
9. Apparatus according to Claim 8 wherein the circuitry for sensing comprises a current-sensing resistor in series with the batter)'.
10. Apparatus according to Claim 9 including circuitry for measuring voltage drop across the current-sensing resistor for input to the circuitry for regulating.
11. Apparatus according to any of Claims 8 to 10 wherein the circuitry for current sensing is operable such that the current measurements are made over a predetermined time period and/or at predetermined time intervals.
12. Apparatus according to Claim 11 wherein the circuitry for current sensing is operable such that the measurements are substantially instantaneous and/or continual.
13. A device for charging a portable electronic device, the device for charging comprising apparatus according to any preceding claim.
14. A method for charging a portable electronic device, the method comprising dynamically regulating the current from a charger apparatus to the portable electronic device so that the current being input to the battery of the portable electronic device is at a magnitude independent of the current drawn by other operations of the portable electronic device.
15. A method according to Claim 14 wherein the regulating inputs a predetermined magnitude current to the battery of the portable electronic device.
16. A method according to Claims 14 or 15 wherein the regulating comprises determining current drawn by said other operations for control of the current from the charger to the portable electronic device.
17. A method according to Claim 16 wherein the determining comprises measuring the current consumption at all said other operations of the portable electronic device, and summing the current measurements derived from the measurement step.
18. A method according to Claim 16 or 17 wherein the regulating comprises combining the output of said summing with the battery current input for derivation of the charger current to the portable electronic device.
19. A method according to any of Claims 16 to 18 wherein the current determining comprises measuring the current drawn by said other operations over a predetermined time period and/or at predetermined time intervals.
20. A method according to Claim 19 wherein the current determining comprises making measurements that are substantially instantaneous and/or continual.
21. A method according to Claims 14 or 15 comprising sensing current to the battery of the portable electronic device for the regulating.
22. A method according to Claim 21 wherein the sensing comprises measuring the voltage drop across a current-sensing resistor in series with the battery for input to the regulating.
23. A method according to Claims 21 or 22 wherein the current sensing makes the current measurements over a predetermined time period and/or at predetermined time intervals.
24. A method according to Claim 23 wherein the current sensing makes substantially instantaneous and/or continual measurements.
25. A computer program comprising for an apparatus for charging a portable electronic device, the computer program comprising computer code for dynamically regulating the current from a charger to the portable electronic device so that the current being input to the battery of the portable electronic device is at a magnitude independent of the current drawn by other operations of the portable electronic device.
26. Apparatus for charging a portable electronic device, the apparatus comprising means for dynamically regulating the current from a charger to the portable electronic device so that the current being input to the battery of the portable electronic device is at a magnitude independent of the current drawn by other operations of the portable electronic device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2007/005170 WO2008151643A1 (en) | 2007-06-12 | 2007-06-12 | Apparatus for battery charging and method of charging a battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2007/005170 WO2008151643A1 (en) | 2007-06-12 | 2007-06-12 | Apparatus for battery charging and method of charging a battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008151643A1 true WO2008151643A1 (en) | 2008-12-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2007/005170 WO2008151643A1 (en) | 2007-06-12 | 2007-06-12 | Apparatus for battery charging and method of charging a battery |
Country Status (1)
| Country | Link |
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| WO (1) | WO2008151643A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993019508A1 (en) * | 1992-03-18 | 1993-09-30 | Grid Systems Corporation | A power supply and battery charging system |
| US5463305A (en) * | 1982-06-07 | 1995-10-31 | Norand Corporation | Fast battery charging system and method |
| US6275007B1 (en) * | 1999-05-14 | 2001-08-14 | Murata Manufacturing Co., Ltd. | Charging controller |
-
2007
- 2007-06-12 WO PCT/EP2007/005170 patent/WO2008151643A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5463305A (en) * | 1982-06-07 | 1995-10-31 | Norand Corporation | Fast battery charging system and method |
| WO1993019508A1 (en) * | 1992-03-18 | 1993-09-30 | Grid Systems Corporation | A power supply and battery charging system |
| US6275007B1 (en) * | 1999-05-14 | 2001-08-14 | Murata Manufacturing Co., Ltd. | Charging controller |
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