US20160164324A1 - Portable device capable of controlling output characteristics of adaptor, and corresponding method - Google Patents

Portable device capable of controlling output characteristics of adaptor, and corresponding method Download PDF

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Publication number
US20160164324A1
US20160164324A1 US14/777,526 US201414777526A US2016164324A1 US 20160164324 A1 US20160164324 A1 US 20160164324A1 US 201414777526 A US201414777526 A US 201414777526A US 2016164324 A1 US2016164324 A1 US 2016164324A1
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United States
Prior art keywords
adaptor
voltage
battery
portable device
controlling
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Abandoned
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US14/777,526
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English (en)
Inventor
Chih-Yuan Hsu
Chi-Ming Lee
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MediaTek Inc
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MediaTek Inc
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Priority to US14/777,526 priority Critical patent/US20160164324A1/en
Assigned to MEDIATEK INC. reassignment MEDIATEK INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HSU, CHIH-YUAN, LEE, CHI-MING
Publication of US20160164324A1 publication Critical patent/US20160164324A1/en
Abandoned legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • 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
    • H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • H02J7/0044—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction specially adapted for holding portable devices containing batteries
    • H02J7/045—
    • G01R31/3679—
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/392—Determining battery ageing or deterioration, e.g. state of health
    • 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
    • H02J7/0069—Charging or discharging for charge maintenance, battery initiation or rejuvenation
    • 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
    • H02J7/007—Regulation of charging or discharging current or voltage
    • 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
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
    • 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
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • 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
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
    • H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • H02J7/00034—Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge

Definitions

  • the present invention relates to a charging scheme for controlling an adaptor, and more particularly to a portable device capable of controlling output characteristics of the adaptor and corresponding method.
  • the conventional adaptor when a conventional adaptor is connected to an electronic device via a communication interface to charge a battery of the electronic device, the conventional adaptor usually employs a constant current to charge the battery in a constant current mode.
  • a constant current can be employed for charging the battery.
  • the smaller current indicates that it is necessary for the conventional adaptor to consume a longer time period to charge the battery. This drawback is unacceptable by users. Accordingly, it is important to provide a novel charging scheme to overcome the shortcoming of the prior art.
  • one of the objectives of the present invention is to provide a portable device and method capable of controlling output characteristics of an adaptor used for charging a battery of the portable device, to solve the above-mentioned problems.
  • a portable device capable of controlling output characteristics of an adaptor used for charging a battery of the portable device.
  • the portable device comprises a sensing circuit and a controlling circuit.
  • the sensing circuit senses a condition of the battery.
  • the controlling circuit controls the adaptor to adjust its output characteristics based on the condition of the battery.
  • a method for employing a portable device to control output characteristics of an adaptor which is used for charging a battery of the portable device comprises: sensing a condition of the battery; and controlling the adaptor to adjust its output characteristics based on the condition of the battery.
  • an adaptor used for charging a battery of a portable device is disclosed.
  • An output characteristic of the adaptor is configurable according to a condition of the battery.
  • the portable device can communicate with the controllable adaptor via a variety of communication interfaces and control output characteristics of the controllable adaptor, to achieve the purpose of fast charging, avoid thermal damage, enhance/improve the whole charging efficiency, and to save more power.
  • FIG. 1 is a diagram of a charging system according to an embodiment of the present invention.
  • FIG. 2 is a diagram illustrating a safe operating area of the conductive circuit element as shown in FIG. 1 .
  • FIG. 3 is a diagram illustrating I-V curve of the adaptor according to the embodiments of FIG. 1 .
  • FIG. 4 is a control flowchart of the operations of the charging system as shown in FIG. 1 according to an embodiment of fast charging in the present invention.
  • FIG. 1 is a diagram of a charging system 100 according to an embodiment of the present invention.
  • the charging system 100 comprises an adaptor 105 such as an AC-to-DC traveler adaptor (but not limited) and a portable device 110 such as a mobile device (e.g. a smart phone device, a tablet).
  • the portable device 110 comprises a conductive circuit element 1101 , a resistor 1102 , a battery 1103 , a sensing circuit 1104 , and a controlling circuit 1105 .
  • the sensing circuit 1104 and the controlling circuit 1105 can be regarded as a battery charger device which can be implemented by using an integrated circuit chip.
  • the adaptor 105 is used for converting an AC source into DC charging voltage Vchg and charging current Ichr and providing the charging voltage Vchg and charging current Ichr for charging the battery 1103 of portable device 110 .
  • the adaptor 105 is capable of providing a variety of different charging voltages and charging currents for the battery 1103 based on different conditions of the battery 1103 .
  • the output characteristic of the adaptor 105 is configurable according to a condition of the battery 1103 .
  • the portable device 110 can inform the adaptor 105 of the condition of the battery 1103 such as a battery voltage, and control the adaptor 105 to dynamically output different charging voltages and charging currents under different conditions.
  • the conductive circuit element 1101 in this embodiment is implemented with (but not limited) a bipolar junction transistor or a MOS transistor.
  • the battery 1103 includes at least one cell.
  • the sensing circuit 1104 is coupled to the battery 1103 and used for sensing a condition of the battery 1103 .
  • the sensing circuit 1104 senses the battery voltage Vbat of the battery 1103 to generate a sensing result of the battery voltage Vbat.
  • the controlling circuit 1105 is coupled to the sensing circuit 1104 and used for controlling the adaptor 105 to adjust its out characteristics based on the condition of the battery 1103 .
  • the controlling circuit 1105 can determine the desired charging voltage and/or charging current that are supplied from the adaptor 105 based on the sensing result of battery voltage Vbat.
  • the controlling circuit 1105 informs the adaptor 105 of the determined charging voltage and charging current by sending control signals to the adaptor 105 via a specific communication interface such as via the VBUS line of USB communication interface, via a dedicated communication line of USB communication interface, or via any communication interface between the adaptor 105 and the portable device 110 .
  • the adaptor 105 can provide the charging voltage and charging current determined by the portable device 110 for charging the battery 1103 according to the control signals. Specifically, in order to achieve fast charging and thermal protection simultaneously, the portable device 110 controls the adaptor 105 to supply a maximum charging current to the battery 1103 as far as possible.
  • the maximum charging current that can be provided by the adaptor 105 depends on a condition of the battery 1103 and a power dissipation threshold associated with the thermal protection.
  • the condition indicates the battery voltage Vbat
  • the power dissipation threshold Pdmax of the conductive circuit element is considered as the power dissipation threshold associated with the thermal protection.
  • the power dissipation threshold associated with the thermal protection may be a threshold of another different circuit element included within the portable device 110 .
  • the controlling circuit 1105 controls the adaptor 105 to adjust and then provide the charging voltage Vchg after determining the maximum charging current that can be provided by the adaptor 105 as far as possible so that the provided charging current and charging voltage would not result in a power dissipation exceeding above the power dissipation threshold Pdmax.
  • the relation of power dissipation resulted from the conductive circuit element 1103 can be calculated according to the following equation:
  • Vchg indicates the output charging voltage outputted by the adaptor 105 for charging the battery 1103
  • Vbat indicates the battery voltage
  • Ichr indicates the charging current.
  • the battery voltage Vbat can be sensed by the sensing circuit 1104 , and accordingly the controlling circuit 1105 can adjust the charging current Ichr and output charging voltage Vchg in order to maximize the charging current Ichr and avoid the power dissipation Pd exceed the power dissipation threshold Pdmax. That is, in order to increase the charging current Ichr as far as possible, the portable device 110 is arranged to decrease the voltage difference between the output charging voltage Vchg and the battery voltage Vbat.
  • the controlling circuit 1105 may set the output charging voltage Vchg as a voltage level that is lower than a level calculated based on the maximized charging current Ichr, so that the corresponding power dissipation Pd is slightly smaller than the power dissipation threshold Pdmax and the conductive circuit element 1101 is not damaged. That is, after determining and configuring the charging current Ichr provided by the adaptor 105 , the portable device 110 can control the adaptor 105 to selectively output or supply different output charging voltage levels.
  • a first level may be determined based on the above-mentioned equation and the maximized charging current, and a second level may be a level which is slightly lower than the first level.
  • the selection of supplying different output charging voltage levels according to the same charging current provides a flexibility of outputting different powers.
  • the portable device 110 controls the adaptor 105 to select one of multiple charging levels corresponding to different powers and provide the selected voltage for the battery 1103 under different conditions.
  • the portable device 110 (or the controlling circuit 1105 ) can be used for configuring the charging current Ichr supplied by the adaptor 105 based on the battery voltage Vbat, determining the output charging voltage Vchg provided by the adaptor 105 according to the configured charging current Ichr, and controlling the adaptor 105 to output the determined output charging voltage Vchg and the configured charging current Ichr.
  • the portable device 110 including the sensing circuit 1104 and controlling circuit 1105 is capable of controlling output characteristics of the adaptor 105 .
  • the output characteristics may indicate (but not limited to) the charging current Ichr or the output charging voltage Vchg.
  • the output characteristics may include AC-to-DC switching frequency, AC-to-DC bias current, the precision of output voltage, voltage ripple, and the dynamic loading, etc.
  • the portable device 110 can also be used to control the output characteristics of the adaptor 105 by adjusting at least one characteristic of AC-to-DC switching frequency, AC-to-DC bias current, the precision of output voltage, voltage ripple, and the dynamic loading, etc., so as to adjust the charging current Ichr.
  • controlling circuit 1105 can adjust the output charging voltage Vchg after determining/configuring the charging current Ichr in a first embodiment or can adjust the charging current Ichr after determining/configuring the output charging voltage Vchg in a second embodiment according to the equation of power dissipation of conductive circuit element 1101 .
  • the conductive circuit element 1101 can be implemented with a bipolar junction transistor.
  • the bipolar junction transistor is turned on and becomes saturated when the adaptor 105 is charging the battery 1103 .
  • the voltage drop between the collector and emitter of the bipolar junction transistor is marked as VCE which in some examples may be equivalent to 0.25 Volts-0.4 Volts.
  • VCE voltage drop between the collector and emitter of the bipolar junction transistor
  • the voltage different between the output charging voltage Vchg and battery voltage Vbat can be represented by VCE+Ichr*R wherein R indicates the resistance value of the resistor 1102 disposed between the bipolar junction transistor and the battery 1103 . The resistance value is very small and can be ignored.
  • the voltage different between the output voltage Vchg and battery voltage Vbat is almost equivalent to VCE. Accordingly, the maximum of charging current Ichr can be calculated or estimated by the following equation:
  • Imax indicates the maximum of charging current Ichr.
  • the maximum charging current Imax can be configured as 2.8 A ⁇ 1.75 A that is dependent upon the voltage drop VCE between the collector and emitter of the bipolar junction transistor. If the voltage drop VCE is equal to 0.25 Volts, the maximum charging current Imax can be configured as 2.8 A. If the voltage drop VCE is equal to 0.4 Volts, the maximum charging current Imax can be configured as 1.75 A.
  • the controlling circuit 1105 of portable device 110 is arranged to control the adaptor 105 to output the maximum charging current Imax as the charging current Ichr for the battery 1103 and output the output charging voltage Vchg that is equal to the sum of the voltage drop VCE and battery voltage Vbat.
  • the output charging voltage Vchg supplied by the adaptor 105 can be dynamically adjusted according to the change of the battery voltage Vbat since the battery voltage Vbat can be sensed by the sensing circuit 1104 and the voltage drop VCE can be determined. That is, the portable device 110 can control the adaptor 105 to output the stable maximum current Imax and different charging voltage levels based on the different levels of the battery voltage Vbat.
  • the battery 1103 can be rapidly charged with the maximum charging current Imax in a constant current mode.
  • FIG. 2 is a diagram illustrating a safe operating area of the conductive circuit element 1101 such as the bipolar junction transistor as shown in FIG. 1 .
  • the controlling circuit 1105 in addition to configuring the charging current Ichr as the maximum charging current Imax, the controlling circuit 1105 can also configure the charging current Ichr as any currents that are smaller than the maximum charging current Imax, and can control the adaptor 105 to adjust the output charging voltage Vchg or not to adjust the output charging voltage Vchg.
  • the dotted line area of FIG. 2 indicates that the conductive circuit element 1101 is not damaged due to thermal damage caused by the power dissipation when the conductive circuit element 1101 is turned on and becomes saturated.
  • the dotted line area represents the safe operating area of the conductive circuit element 1101 .
  • the charging current Ichr may be configured by the portable device 110 as a current (e.g. 368 mA, 500 mA, or 777 mA) that is smaller than the maximum current Imax such as 1.75 A.
  • the portable device 110 (or controlling circuit 1105 ) correspondingly. sets the output charging voltage Vchg as 5.5 Volts, 5 Volts, or 4.5 Volts when the level of battery voltage Vbat is equal to 3.6 Volts.
  • the combination of 500 mA and 5 Volts indicates that the adaptor 105 can output more or maximum power.
  • the portable device 110 when the portable device 110 configures the charging current Ichr as a current smaller than the maximum current Imax, the portable device 110 can control the adaptor 105 to output different voltage levels for charging. For example, when the portable device 110 configures the charging current Ichr as a current of 777 mA smaller than 1.75 A, the portable device 110 can control the adaptor 105 to output different voltage levels 4 Volts-4.5 Volts for charging. Similarly, when the portable device 110 configures the charging current Ichr as a current of 500 mA, the portable device 110 can control the adaptor 105 to output different voltage levels 4 Volts-5 Volts for charging. The charging current Ichr becomes smaller, and the range of output charging voltage level becomes wider. It should be noted that the example shown in FIG.
  • the battery voltage Vbat may be changed with time when the adaptor 105 continuously charges the battery 1103 , and the safe operating area of the conductive circuit element 1101 becomes different correspondingly.
  • the maximum power dissipation (i.e. power dissipation threshold) of the conductive circuit element, 0.7 W is merely used for illustrative purposes and is not intended to be a limitation of the present invention.
  • FIG. 3 is a diagram illustrating I-V curve of the adaptor 105 according to the embodiments of FIG. 1 .
  • the controlling circuit 1105 is arranged to adjust the charging current Ichr after determining/configuring the output charging voltage Vchg. As shown in FIG. 3 , for example, the controlling circuit 1105 or the portable device 110 can control the adaptor 105 to supply a current of 1 A (i.e. the charging current Ichr) and 5 Volts (i.e. the output charging voltage Vchg) for charging the battery 1103 .
  • the adaptor 105 is capable of providing the power of 5 W.
  • the controlling circuit 1105 or portable device 110 can control the adaptor 105 to decrease and configure the output charging voltage Vchg as 4.6 Volts that is lower than 5 Volts, and then control the adaptor 105 to select one current value from a range of 1000 mA-1086 mA as the charging current Ichr for charging the battery 1103 . If the charging current Ichr is configured as 1086 mA, then this indicates that the adaptor 105 is still providing the output power of 5 W almost. The adaptor 105 substantially keeps its output power at 5 W. Also, the charging current Ichr can be still configured as 1 A.
  • the controlling circuit 1105 or portable device 110 can control the adaptor 105 to decease and configure the output charging voltage Vchg as 3.8 Volts lower than 4.6 Volts, and then control the adaptor 105 to select one current value from a range of 1000 mA-1315 mA as the charging current Ichr for charging the battery 1103 . If the charging current Ichr is configured as 1315 mA, then this indicates that the adaptor 105 is still providing the output power of 5 W almost. The adaptor 105 substantially keeps its output power at 5 W. Also, the charging current Ichr can be still configured as 1 A or 1.086 A.
  • the controlling circuit 1105 configures the charging voltage Vchg as a lower level
  • the charging current Ichr that can be supplied by the adaptor 105 to the battery 1103 can be increased for rapidly charging the battery 1103 especially in a constant current charging mode
  • the adaptor 105 is capable of substantially keeping its output power at a rated maximum output power such as 5 W.
  • FIG. 4 is provided to show a control flowchart of the operations of the charging system 100 as shown in FIG. 1 according to an embodiment of fast charging in the present invention. Provided that substantially the same result is achieved, the steps of the flowchart shown in FIG. 4 need not be in the exact order shown and need not be contiguous, that is, other steps can be intermediate. The steps are detailed in the following:
  • Step 405 The controlling circuit 1105 of portable device 110 (i.e. a charging host) communicates with the adaptor 105 via a specific communication interface such as a USB communication interface;
  • Step 410 The controlling circuit 1105 of portable device 110 checks whether the adaptor 105 is a controllable adaptor or not. If the adaptor 105 is controllable, the flow proceeds to Step 415 , otherwise, the flow proceeds to Step 450 ;
  • Step 415 The controlling circuit 1105 of portable device 110 determines or calculates the maximum charging current Imax according to the power dissipation threshold Pdmax and the voltage drop VCE across the conductive circuit element 1101 , and configures the charging current Ichr as the maximum charging current Imax;
  • Step 420 The sensing circuit 1104 senses the battery voltage Vbat, and the controlling circuit 1105 gradually raise up the charging voltage Vchg provided by the adaptor 105 according to the sensed battery voltage Vbat and the voltage drop VCE;
  • Step 425 The sensing circuit 1104 is arranged to sense the charging current Ichr and check whether the charging current Ichr reaches the maximum charging current Imax that has been configured. If the charging current Ichr reaches the maximum charging current Imax, the flow proceeds to Step 430 , otherwise, the flow proceeds back to Step 420 .
  • Step 430 The sensing circuit 1104 is arranged to sense and check whether the actual power dissipation of the conductive circuit element 1101 exceed above the power dissipation threshold Pdmax or not by using a temperature sensor to detect the operating temperature of conductive circuit element 1101 . If the detected temperature is lower than a temperature threshold, this may indicate that the actual power dissipation of conductive circuit element 1101 does not exceed above the power dissipation threshold Pdmax and the flow proceeds to Step 435 ; otherwise, the flow proceeds to Step 450 ;
  • Step 435 The controlling circuit 1105 of portable device 110 sets/configures the adjusted output charging voltage Vchg provided by the adaptor 105 ;
  • Step 440 The sensing circuit 1104 is arranged to sense the battery voltage Vbat, and the controlling circuit 1105 is arranged to estimate whether the sensed battery voltage Vbat is changed or not. If the sensed battery voltage Vbat is changed, the flow proceeds to Step 420 ; otherwise, the flow proceeds to Step 445 .
  • Step 445 The controlling circuit 1105 controls and keeps the adaptor 105 to output the output charging voltage Vchg that has been set/configured in Step 435 ;
  • Step 450 End.
  • Step 405 the portable device 110 is arranged to communicate with the adaptor 105 via the specific communication interface such as USB communication interface.
  • the USB communication interface may be implemented by using a USB cable, and the portable device 110 can send information or commands to the adaptor 105 via data line (i.e. D+ or D ⁇ ) and/or power supply line (i.e. VBUS) of the USB cable so as to control/adjust the output characteristics of the adaptor 105 .
  • data line i.e. D+ or D ⁇
  • power supply line i.e. VBUS
  • the above-mentioned example is not meant to a limitation of the present invention.
  • Other examples of using different communication interfaces or using different communication protocols to control/adjust the output characteristics of the adaptor 105 should fall within the scope of the present invention.
  • Step 410 before controlling the output characteristics of the adaptor 105 , the portable device 110 is arranged to check whether the adaptor 105 is a controllable adaptor capable of supporting this controllable scheme.
  • the adaptor 105 is a controllable adaptor, and the flow proceeds to Step 415 so that the portable device 110 begins to control the output characteristics of the adaptor 105 .
  • Step 450 if another adaptor not supporting this controllable scheme is connected to the portable device 110 , the flow proceeds to Step 450 and the portable device 100 is not arranged to control the output characteristics of this adaptor.
  • the controlling circuit 1105 is arranged to configure the charging current Ichr as the maximum charging current Imax so as to achieve the purpose of fast charging.
  • the controlling circuit 1105 can configure the charging current Ichr as a current that is slightly smaller than the maximum charging current Imax, to achieve the purpose of fast charging. This modification can also reduce the whole charging time effectively.
  • the above-mentioned temperature sensor employed by the sensing circuit 1104 may be implemented by using a negative temperature coefficient (NTC) thermistor or a positive temperature coefficient (PTC) thermistor.
  • NTC negative temperature coefficient
  • PTC positive temperature coefficient
  • the portable device 110 can inform the adaptor 105 of the condition of the battery 1103 , and control the adaptor 105 to dynamically provide/supply different output characteristics corresponding to different operation modes.
  • the adaptor 105 comprises a normal mode and a green mode (or called sleep mode). Under the normal mode, the controlling circuit 1105 of portable device 110 controls the adaptor 105 to provide normal output characteristics such as a normal output power.
  • the normal output characteristics may include AC-to-DC switching frequency, AC-to-DC bias current, the precision of output voltage, voltage ripple, and/or the dynamic loading, etc.
  • the controlling circuit 1105 can control the sensing circuit 1104 to sense the condition of the battery 1103 (i.e.
  • the controlling circuit 1105 is arranged to control the adaptor 105 to exit from the normal mode and enter the green mode or sleep mode. That is, the portable device 110 can sense the loading condition and control the adaptor 105 exit from the normal mode and enter the green mode or sleep mode according to the sensing result. In addition, the controlling circuit 1105 can also control the adaptor 105 to decrease the output characteristics and control the adaptor 105 to enter the green mode or sleep mode if the controlling circuit 1105 estimates that the portable device 110 switches from a heavy loading condition to a light loading condition.
  • the adaptor 105 may be designed as an adaptor device operating under the green mode or sleep mode according to the default setting. Under the green mode or sleep mode, the controlling circuit 1105 of portable device 110 controls the adaptor 105 to provide the decreased/reduced output characteristics such as a lower output power. The controlling circuit 1105 can check whether the adaptor 105 is connected to portable device 110 to charge the battery 1103 , and can control the adaptor 105 to increase the output characteristics of the adaptor 105 and control the adaptor 105 to exit from the green mode or sleep mode to enter the normal mode if it is required for the adaptor 105 to charge the battery 1103 .
  • the portable device 110 can sense the loading condition and control the adaptor 105 exit from the green mode or sleep mode and enter the normal mode according to the sensing result.
  • the controlling circuit 1105 can also control the adaptor 105 to increase the output characteristics of the adaptor 105 so as to control the adaptor 105 to enter the normal mode if the controlling circuit 1105 estimates that the portable device 110 switches from a light loading condition to a heavy loading condition.
  • the portable device 110 as shown in FIG. 1 employs the linear charger structure; however, this is not intended to be a limitation of the present invention.
  • Other types of charger structure can be also applied into the portable device 110 .
  • the portable device 110 can also employ the switching mode charger structure. This also falls within the scope of the present invention.
  • the portable device 110 can communicate with the controllable adaptor 105 via a variety of communication interfaces and control output characteristics of the controllable adaptor 105 , to achieve the purpose of fast charging, avoid thermal damage, enhance/improve the whole charging efficiency, and to save more power.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
US14/777,526 2013-06-03 2014-06-03 Portable device capable of controlling output characteristics of adaptor, and corresponding method Abandoned US20160164324A1 (en)

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US201361830486P 2013-06-03 2013-06-03
US14/777,526 US20160164324A1 (en) 2013-06-03 2014-06-03 Portable device capable of controlling output characteristics of adaptor, and corresponding method
PCT/CN2014/079099 WO2014194810A1 (fr) 2013-06-03 2014-06-03 Dispositif portable apte à commander les caractéristiques de sortie d'un adaptateur et procédé correspondant

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US14/782,331 Active 2034-11-21 US9929576B2 (en) 2013-06-03 2014-06-03 Method, device, and adaptor for dynamically adjusting charging current of adaptor to achieve thermal protection and fast charging

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US9929576B2 (en) 2018-03-27
CN104335446B (zh) 2017-05-03
CN104885328B (zh) 2017-08-01
WO2014194810A1 (fr) 2014-12-11
US20160049804A1 (en) 2016-02-18
EP3005527A1 (fr) 2016-04-13
CN104335446A (zh) 2015-02-04
WO2014194811A1 (fr) 2014-12-11
EP3005527B1 (fr) 2018-03-14
EP3005527A4 (fr) 2016-08-17

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