JP2018532358A - Adapter and charge control method - Google Patents

Adapter and charge control method Download PDF

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Publication number
JP2018532358A
JP2018532358A JP2017564618A JP2017564618A JP2018532358A JP 2018532358 A JP2018532358 A JP 2018532358A JP 2017564618 A JP2017564618 A JP 2017564618A JP 2017564618 A JP2017564618 A JP 2017564618A JP 2018532358 A JP2018532358 A JP 2018532358A
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Prior art keywords
voltage
adapter
current
output
charging
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JP2017564618A
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Japanese (ja)
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チェン ティエン
チェン ティエン
ジャリャン ジャン
ジャリャン ジャン
Original Assignee
グァンドン オッポ モバイル テレコミュニケーションズ コーポレーション リミテッド
グァンドン オッポ モバイル テレコミュニケーションズ コーポレーション リミテッド
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Priority to CN201610600612.3 priority Critical
Priority to CN201610600612 priority
Application filed by グァンドン オッポ モバイル テレコミュニケーションズ コーポレーション リミテッド, グァンドン オッポ モバイル テレコミュニケーションズ コーポレーション リミテッド filed Critical グァンドン オッポ モバイル テレコミュニケーションズ コーポレーション リミテッド
Priority to PCT/CN2017/070526 priority patent/WO2017133386A2/en
Publication of JP2018532358A publication Critical patent/JP2018532358A/en
Application status is Pending legal-status Critical

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Abstract

The present invention provides a power conversion unit, a voltage feedback unit, a current feedback unit, an input terminal connected to an output terminal of the voltage feedback unit and an output terminal of the current feedback unit, an output terminal connected to the power conversion unit, If a feedback signal and a current feedback signal are received and the voltage feedback signal indicates that the output voltage of the second adapter has reached the target voltage, or that the current feedback signal has reached the target current of the second adapter , An adapter including a power adjustment unit configured to stabilize the output voltage and output current of the second adapter and a charge control method are provided. The second adapter according to the present invention can improve the safety of the charging process.
[Selection] Figure 1A

Description

  The present invention relates to the field of charging technology, and more specifically to an adapter and a charging control method.

  The adapter is also called a power adapter and is used to charge a charged device (for example, a terminal). Currently, commercially available adapters typically charge a charged device (eg, terminal) at a constant voltage, but the current drawn by the charged device (eg, terminal) is the maximum output current threshold that the adapter can provide. Exceeding the threshold value, it may cause the adapter to enter an overload protection state, and charging of the charged device (eg, terminal) may not be continued.

  Embodiments of the present invention provide an adapter and a charge control method in order to improve the safety of the charging process.

  In the first aspect, the adapter is a power conversion unit configured to obtain an output voltage and an output current of the adapter by converting input alternating current (AC), and an input terminal is the power conversion A voltage feedback unit connected to the unit and configured to generate a voltage feedback signal indicating whether the output voltage of the adapter has reached a predetermined target voltage by detecting the output voltage of the adapter; and An input end is connected to the power conversion unit and configured to generate a current feedback signal indicating whether or not the output current of the adapter has reached a predetermined target current by detecting the output current of the adapter. Current feedback unit, and the input terminal is the output terminal of the voltage feedback unit and the current feedback. Connected to the output end of the knit, the output end is connected to the power conversion unit, the voltage feedback signal and the current feedback signal are received, and the output voltage of the adapter has reached the target voltage. Or when the current feedback signal indicates that the output current of the adapter has reached the target current, a power adjustment unit configured to stabilize the output voltage and output current of the adapter, and a charging An adapter for performing bidirectional communication with the device to be charged via a data line of the charging interface.

  In the second aspect, the charge control method used for the adapter is to obtain an output voltage and an output current of the adapter by converting an input alternating current (AC), and to output an output voltage of the adapter. By detecting, generating a voltage feedback signal indicating whether or not the output voltage of the adapter has reached a predetermined target voltage, and detecting the output current of the adapter, the output current of the adapter is predetermined. Generating a current feedback signal indicating whether or not the target current of the adapter has been reached, and if the voltage feedback signal indicates that the output voltage of the adapter has reached the target voltage, or the current feedback signal is If the output current indicates that the target current has been reached, the adapter output voltage and current should be stabilized. , To provide a charging control method comprising, a to perform the be-charged device and two-way communication via a data line of the charging interface.

  An adapter according to an embodiment of the present invention includes both a voltage feedback unit and a current feedback unit. Among them, the voltage feedback unit, the power adjustment unit, and the power conversion unit form a hardware circuit for controlling the output voltage of the adapter in a closed loop, that is, a hardware voltage feedback loop. On the other hand, the current feedback unit, the power adjustment unit, and the power conversion unit form a hardware circuit for controlling the output current of the adapter in a closed loop, that is, a hardware current feedback loop. The power adjustment unit according to the embodiment of the present invention takes into account feedback information provided by the voltage feedback signal and the current feedback signal based on the double loop feedback control, and outputs the adapter output voltage and the adapter output current. When either one reaches the target value, the output voltage and output current of the adapter are stabilized. In other words, in the embodiment of the present invention, when either one of the output voltage and output current of the adapter reaches the target value, the power adjustment unit immediately senses this result and responds immediately. Stabilize the output voltage and output current of the adapter and improve the safety of the charging process.

  Hereinafter, in order to explain the technical solutions according to the embodiments of the present invention more clearly, the drawings necessary for describing the embodiments of the present invention will be briefly introduced. The drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be conceived by these drawings without creative efforts.

FIG. 1A is a schematic structural diagram of a second adapter according to an embodiment of the present invention. FIG. 1B is a schematic structural diagram of a power conversion unit according to an embodiment of the present invention. FIG. 2 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 3 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 4 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 5 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 6 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 7 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 8 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 9 is a schematic structural diagram of a voltage comparison unit according to an embodiment of the present invention. FIG. 10 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 11 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 12 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 13 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 14 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 15 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 16 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 17 is a schematic structural diagram of a current comparison unit according to an embodiment of the present invention. FIG. 18 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 19A is a schematic diagram illustrating a connection method between the second adapter and the device to be charged according to the embodiment of the present invention. FIG. 19B is a schematic diagram of a quick charge communication process according to an embodiment of the present invention. FIG. 20 is a schematic diagram of a current waveform of a pulsating direct current. FIG. 21 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 22 is a schematic diagram of pulsating direct current in the constant current mode according to the embodiment of the present invention. FIG. 23 is a circuit diagram of the second adapter according to the embodiment of the present invention. FIG. 24 is a flowchart of the charge control method according to the embodiment of the present invention.

  DESCRIPTION OF EMBODIMENTS The following clearly and completely describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained based on the embodiments of the present invention on the assumption that those skilled in the art do not make creative efforts shall fall within the protection scope of the present invention.

  In the related art, reference has been made to a first adapter for operating in a constant voltage mode to charge a device to be charged (eg, a terminal). In the first adapter, the voltage output in the constant voltage mode basically maintains a voltage such as 5V, 9V, 12V or 20V constant.

  The voltage output from the first adapter is not directly applied to both ends of the battery, but is converted by a conversion circuit in the device to be charged (for example, terminal), so that the voltage in the device to be charged (for example, terminal) Obtain the desired charging voltage and / or charging current of the battery.

  The conversion circuit is configured to satisfy a desired charging voltage and / or charging current requirement of the battery by converting the voltage output from the first adapter.

  As an example, the conversion circuit may refer to a charge management module for managing a charging voltage and / or a charging current of a battery during a battery charging process, such as an integrated circuit (IC) for charging. The conversion circuit has the function of the voltage feedback module and / or the function of the current feedback module, thereby realizing management of the charging voltage and / or charging current of the battery.

  For example, the battery charging process may include one or more of a trickle charging phase, a constant current charging phase, and a constant voltage charging phase. In the trickle charge phase, the converter circuit may allow the current entering the battery in the trickle charge phase to satisfy the desired charge current (eg, the first charge current) of the battery through a current feedback loop. In the constant current charging stage, the conversion circuit causes a current feedback loop to cause the current entering the battery in the constant current charging stage to be a desired charging current of the battery (eg, a second charging current that can be a charging current greater than the first charging current). Can meet. In the constant voltage charging stage, the conversion circuit may allow the voltage applied across the battery in the constant voltage charging stage to satisfy the desired charging voltage of the battery by a voltage feedback loop.

  As an example, when the voltage output from the first adapter is higher than the desired charging voltage of the battery, the conversion circuit performs a step-down process on the voltage output from the first adapter, thereby obtaining the charge obtained after the step-down conversion. The voltage can be configured to meet the desired charging voltage requirement of the battery. As another example, when the voltage output from the first adapter is smaller than the desired charging voltage of the battery, the conversion circuit obtains the voltage output from the first adapter after the boost conversion by performing a boost process on the voltage output from the first adapter. The charged voltage is configured to meet the desired charge voltage requirement of the battery.

  As another example, for example, when the first adapter outputs a constant voltage of 5 V, when the battery is a single cell (the lithium battery cell is taken as an example and the end-of-charge voltage of the single cell is 4.2 V), the conversion circuit (For example, the Buck step-down circuit) performs a step-down process on the voltage output from the first adapter, so that the charge voltage obtained after the step-down can satisfy the demand for the desired charge voltage of the battery.

  As another example, for example, when the first adapter outputs a constant voltage of 5 V, a battery in which two or more single cells are connected in series by the first adapter (for example, a lithium battery cell is used as an end-of-charge voltage of a single cell). Is charged to 4.2V), the conversion circuit (for example, the boost booster circuit) performs a boosting process on the voltage output from the first adapter, so that the charging voltage obtained after boosting is charged to the battery. To meet the desired charging voltage requirements.

  Since the conversion circuit is limited to the low efficiency of circuit conversion, the electrical energy of the unconverted portion is lost in the form of heat. Such an amount of heat is concentrated inside the device to be charged (for example, a terminal). The design space and heat dissipation space of the device to be charged (for example, the terminal) are small (for example, the mobile terminal used by the user is lighter and thinner in physical size, and a large amount of electronic devices for improving the performance of the mobile terminal) The components are densely arranged in the mobile terminal), which not only increases the design difficulty of the conversion circuit, but also makes it difficult to quickly release the amount of heat concentrated in the charged device (for example, the terminal). There is a possibility that an abnormality may occur in a charging device (for example, a terminal).

  For example, the amount of heat concentrated on the conversion circuit may cause thermal interference to electronic components near the conversion circuit, which may cause abnormal operation of the electronic components. As another example, the amount of heat concentrated in the conversion circuit can shorten the service life of the conversion circuit and the electronic components in the vicinity thereof. As another example, the amount of heat concentrated on the conversion circuit may cause thermal interference to the battery, which may cause abnormal charging / discharging of the battery. As yet another example, the amount of heat concentrated on the conversion circuit may increase the temperature of the device to be charged (for example, a terminal) and may affect the user's use experience during charging. As yet another example, the amount of heat concentrated in the conversion circuit may cause a short circuit of the conversion circuit itself, so that the voltage output from the first adapter is applied directly across the battery, causing abnormal charging. Further, if the battery is charged with an overvoltage for a long time, there is a possibility of explosion, which is a safety problem.

  The embodiment of the present invention provides a second adapter capable of adjusting an output voltage. The second adapter can acquire battery state information. The battery status information may include battery current electricity information and / or voltage information. The said 2nd adapter can satisfy | fill the request | requirement of the desirable charging voltage and / or charging current of a battery by adjusting the output voltage of 2nd adapter itself based on the acquired battery state information. Further, in the constant current charging stage in the battery charging process, the output voltage adjusted by the second adapter is directly applied to both ends of the battery to charge the battery.

  The second adapter may have a function of a voltage feedback module and a function of a current feedback module in order to realize management of the charging voltage and / or charging current of the battery.

  When the second adapter adjusts the output voltage of the second adapter itself according to the acquired battery status information, the second adapter acquires the battery status information in real time, and the battery real-time status information acquired every time. May adjust the output voltage of the second adapter itself to meet the desired charging voltage and / or charging current of the battery.

  The second adapter adjusts the output voltage of the second adapter itself based on the battery state information acquired in real time because the second adapter is charged in the charging process as the battery voltage continuously increases. The battery's current state information is acquired at different points in time, and the output voltage of the second adapter itself is adjusted in real time based on the battery's current state information, thereby satisfying the desired charging voltage and / or charging current requirement of the battery. Can point to that.

  For example, the battery charging process may include one or more of a trickle charging phase, a constant current charging phase, and a constant voltage charging phase. In the trickle charge phase, the second adapter can cause the current feedback loop to allow the current output from the second adapter in the trickle charge phase and into the battery to meet the desired charge current requirement of the battery (eg, First charging current). In the constant current charging phase, the second adapter may allow the current output from the second adapter and entering the battery in the constant current charging phase to satisfy the desired charging current requirement of the battery by a current feedback loop ( For example, a second charging current that may be a charging current greater than the first charging current). In the constant current charging stage, the second adapter can charge the battery by directly applying the output charging voltage to both ends of the battery. In the constant voltage charging stage, the second adapter may cause the voltage output from the second adapter in the constant voltage charging stage to satisfy a desired charging voltage requirement of the battery by a voltage feedback loop.

  In the trickle charge stage and the constant voltage charge stage, the voltage output from the second adapter is used by using a processing method similar to that of the first adapter, that is, a method of converting by a conversion circuit in a device to be charged (for example, a terminal), A desired charging voltage and / or charging current of the battery in the device to be charged (eg, terminal) is obtained.

  Optionally, in one embodiment, the current feedback loop of the second adapter can be implemented by software based on a voltage feedback loop. Specifically, if the charging current output from the second adapter does not satisfy the requirement, the second adapter calculates a desired charging voltage based on the desired charging current, and the voltage feedback loop causes the second adapter to The output charging voltage is adjusted to the calculated desired charging voltage, that is, the function of the current feedback loop can be realized by the voltage feedback loop by software. However, since the load current in the charging circuit always changes rapidly during the process of charging the battery in the constant voltage mode, the second adapter realizes a current feedback loop by software. This requires operation, slows the response speed of the second adapter to the load current, and the current drawn by the charged device (eg, terminal) may exceed the maximum output current threshold that can be provided by the second adapter. This may cause the second adapter to enter the overload protection state, and charging the charged device (for example, the terminal) may not be continued.

  In order to improve the response speed of the second adapter with respect to the load current, a voltage feedback loop in the form of hardware and a current feedback loop in the form of hardware may be provided inside the second adapter. Hereinafter, this will be described in detail with reference to FIG. 1A.

  FIG. 1A is a schematic structural diagram of a second adapter according to an embodiment of the present invention. The second adapter 10 in FIG. 1A may include a power conversion unit 11, a voltage feedback unit 12, a current feedback unit 13, and a power adjustment unit 14.

  The power conversion unit 11 is configured to obtain the output voltage and output current of the second adapter 10 by converting the input alternating current.

  The voltage feedback unit 12 has an input terminal connected to the power conversion unit 11 and detects the output voltage of the second adapter 10 to indicate whether or not the output voltage of the second adapter 10 has reached a predetermined target voltage. A voltage feedback signal is configured to be generated.

  The current feedback unit 13 is connected to the power conversion unit 11 at the input end, and detects whether or not the output current of the second adapter 10 has reached a predetermined target current by detecting the output current of the second adapter 10. A current feedback signal is configured to be generated.

  The power adjustment unit 14 has an input terminal connected to an output terminal of the voltage feedback unit 12 and an output terminal of the current feedback unit 13, an output terminal connected to the power conversion unit 11, and receives a voltage feedback signal and a current feedback signal. When the voltage feedback signal indicates that the output voltage of the second adapter 10 has reached the target voltage, or when the current feedback signal indicates that the output current of the second adapter 10 has reached the target current, The output voltage and the output current are configured to be stabilized.

  Stabilizing the output voltage and output current of the second adapter 10 by the power adjustment unit 14 may refer to controlling the power adjustment unit 14 to keep the output voltage and output current of the second adapter 10 constant. Taking the power adjustment unit 14 which is a pulse width modulation (PWM) power adjustment unit as an example, when the frequency and duty ratio of the PWM control signal are kept constant, the output voltage and output current of the second adapter 10 are stable. Can be retained.

  The second adapter according to the embodiment of the present invention includes both a voltage feedback unit and a current feedback unit. Here, the voltage feedback unit, the power adjustment unit, and the power conversion unit constitute a hardware circuit for controlling the output voltage of the second adapter in a closed loop, that is, a hardware type voltage feedback loop. The current feedback unit, the power adjustment unit, and the power conversion unit constitute a hardware circuit for controlling the output current of the second adapter in a closed loop, that is, a hardware-type current feedback loop. Based on the double loop feedback control, the power adjustment unit according to the embodiment of the present invention takes into account the feedback information provided by the voltage feedback signal and the current feedback signal, and the output voltage of the second adapter and the output of the second adapter. When either one of the currents reaches the target value, the output voltage and output current of the second adapter are stabilized. In other words, in the embodiment of the present invention, when one of the output voltage and the output current of the second adapter reaches the target value, the power adjustment unit immediately senses this situation and responds immediately. The output voltage and output current of the second adapter are stabilized and the safety of the charging process is improved.

  Taking the constant voltage mode as an example, the voltage feedback loop mainly serves to adjust the output voltage of the second adapter to a voltage corresponding to the constant voltage mode, while the current feedback loop has the output current of the second adapter as a target current ( The target current at this time can be the maximum output current allowed in the constant voltage mode), and when the output current of the second adapter reaches the target current, the power adjustment unit performs current feedback. The loop can immediately detect this situation and can immediately stabilize the output current of the second adapter to prevent further increase thereof. Similarly, in the constant current mode, the current feedback loop serves to adjust the output current of the second adapter to a current corresponding to the constant current mode, while the voltage feedback loop allows the output voltage of the second adapter to be the target voltage ( The target voltage at this time may be the maximum output voltage allowed in the constant current mode), and when the output voltage reaches the target voltage, the power adjustment unit causes this situation by the voltage feedback loop. Can be immediately detected, and the output voltage of the second adapter can be immediately stabilized to prevent further increase thereof.

  The voltage feedback signal and the current feedback signal do not limit the signal types of the voltage feedback signal and the current feedback signal, and indicate that the respective feedback targets are different. Specifically, the voltage feedback signal is for feeding back the output voltage of the second adapter, and the current feedback signal may be for feeding back the output current of the second adapter. Any of the signals may be a voltage signal.

  The target voltage may be a predetermined fixed value or an adjustable variable. In some embodiments, the second adapter 10 can adjust the voltage value of the target voltage by a specific adjustment circuit according to actual needs. For example, the to-be-charged device (terminal) can transmit a target voltage adjustment instruction to the second adapter, and the second adapter 10 can adjust the voltage value of the target voltage by the target voltage adjustment instruction. As another example, the second adapter 10 can receive battery state information from the device to be charged, and can adjust the voltage value of the target voltage in real time according to the state of the battery. Similarly, the target current may be a predetermined fixed value or an adjustable variable. In some embodiments, the second adapter 10 can adjust the voltage value of the target current through a specific adjustment circuit according to actual needs. For example, the to-be-charged device (terminal) can transmit a target current adjustment instruction to the second adapter 10, and the second adapter 10 can adjust the voltage value of the target current by the target current adjustment instruction. As another example, the second adapter 10 can receive battery state information from the device to be charged and adjust the current value of the target current in real time according to the state of the battery.

  The device to be charged used in the embodiment of the present invention may be a “communication terminal” (or abbreviated as “terminal”), and may be connected to a wired line (for example, a public switched telephone network (PSTN)). Digital subscriber line (DSL), digital cable, direct connection cable, and / or another data connection / network) and / or wireless interface (eg, cellular network, wireless local area network ( wireless local area network (WLAN), digital television network such as digital video broadcasting handheld (DVB-H) network, satellite network, amplitude modulation-frequency modulation (AM-FM) broadcast transmitter And / or to another communication terminal Including a device configured to receive / transmit communication signals over the wireless interface), but is not limited thereto. A communication terminal configured to communicate via a wireless interface may also be referred to as a “wireless communication terminal”, “wireless terminal” and / or “mobile terminal”. Examples of mobile terminals include satellite or cellular telephones, cellular radio telephones, personal communication system (PCS) terminals incorporating data processing, fax and data communication functions, radio telephones, pagers, Internet / Personal digital assistant (PDA) with intranet access, web browser, organizer, calendar and / or global positioning system (GPS) receiver and normal laptop and / or palmtop reception Machine or other electronic device with a radiotelephone communication device (transceiver).

  In some embodiments, the second adapter 10 includes a control unit (see MCU in FIG. 23) configured to control the charging process to improve the intelligence level of the second adapter 10. But you can. Specifically, the control unit performs two-way communication with a device to be charged (for example, a terminal), so that the instruction or state information of the device to be charged (for example, the terminal) (the state information is stored in the battery to be charged). The current voltage and / or the status information such as the temperature of the device to be charged is obtained) and the device to be charged (for example, the second adapter 10) (for example, based on the instruction or status signal of the device to be charged) , Terminal) is configured to control the charging process. In some embodiments, the control unit may be a microcontroller unit (MCU), but embodiments of the present invention are not limited to this, and may be other types of chips or circuits. Good.

  In some embodiments, the second adapter 10 may include a charging interface (see charging interface 191 in FIG. 19A), but in embodiments of the present invention, the type of charging interface is not particularly limited, for example, A universal serial bus (USB) interface may be used, and the USB interface may be a standard USB interface, a microUSB interface, or a Type-C interface.

  The charging mode or function of the second adapter 10 correlates with the selection of the target voltage and target current. Depending on the different charging modes or functions of the second adapter 10, the values of the target voltage and the target current are also different. Hereinafter, the constant voltage mode and the constant current mode will be described in detail as examples.

  Optionally, in some embodiments, the second adapter 10 is in a first charging mode that is a constant voltage mode (ie, the second adapter 10 operates in the first charging mode to operate a charged device (eg, a terminal ) Can be recharged). In the constant voltage mode, the target voltage of the second adapter 10 is a voltage corresponding to the constant voltage mode. The target current is the maximum output current that the second adapter 10 is allowed in the constant voltage mode. Specifically, the power adjustment unit 14 adjusts the output voltage of the second adapter 10 to a voltage corresponding to the constant voltage mode based on the voltage feedback signal, and the current feedback signal indicates that the output current of the second adapter 10 is the second adapter. When indicating that the maximum output current allowed in the 10 constant voltage mode is reached, control is performed so that the output current of the second adapter 10 does not exceed the maximum output current allowed in the constant voltage mode of the second adapter 10. It is configured as follows.

  In the constant voltage mode, the output voltage of the second adapter 10 is adjusted to a fixed voltage value, and the voltage corresponding to the constant voltage mode described above is the fixed voltage value. For example, in the constant voltage mode, when the output voltage of the second adapter 10 is 5V, the voltage corresponding to the constant voltage mode is 5V.

  In the embodiment of the present invention, the target voltage is set to a voltage corresponding to the constant voltage mode, and the target current is set to the maximum output current allowed for the second adapter in the constant voltage mode. In this way, the second adapter quickly adjusts the output voltage of the second adapter to a voltage corresponding to the constant voltage mode based on the voltage feedback loop, and performs constant voltage charging on the charged device (for example, terminal). It can be performed. In the constant voltage charging process, when the output current of the second adapter (ie, the load current) reaches the maximum allowable output current of the second adapter, the second adapter immediately senses this situation through the current feedback loop and immediately Further, it is possible to prevent further increase in the output current of the second adapter, prevent the occurrence of charging failure, and improve the response capability of the second adapter with respect to the load current.

  For example, in the constant voltage mode, when the fixed voltage value corresponding to the constant voltage mode is 5 V, the output current of the second adapter is generally maintained between 100 mA and 200 mA. In this case, the target voltage may be set to a fixed voltage value (for example, 5V), and the target current may be set to 500 mA or 1A. When the output current of the second adapter increases to a current value corresponding to the target current, the power adjustment unit 14 immediately senses this situation by the current feedback loop and prevents further increase of the output current of the second adapter. .

  As shown in FIG. 1B, based on the above-described embodiment, the power conversion unit 11 may include a primary rectification unit 15, a transformer 16, a secondary rectification unit 17, and a secondary filter unit 18. The primary rectification unit 15 directly outputs a voltage having a pulsation waveform to the transformer 16.

  In the prior art, the power conversion unit includes a rectification unit and a filter unit located on the primary side, and a rectification unit and a filter unit located on the secondary side. The rectification unit and the filter unit located on the primary side may be referred to as a primary rectification unit and a primary filter unit. The rectification unit and the filter unit located on the secondary side may be referred to as a secondary rectification unit and a secondary filter unit. The primary filter unit generally uses a liquid aluminum electrolytic capacitor for filtering, but the volume of the liquid aluminum electrolytic capacitor is relatively large, resulting in an increase in the volume of the adapter.

  In the embodiment of the present invention, the power conversion unit 11 includes a primary rectification unit 15, a transformer 16, a secondary rectification unit 17, and a secondary filter unit 18, and the primary rectification unit 15 converts the voltage of the pulsation waveform to the above. Output directly to the transformer 16. In other words, since the power conversion unit 11 according to the embodiment of the present invention does not include the primary filter unit, the volume of the second adapter 10 can be greatly reduced, and the second adapter 10 can be carried more conveniently. . The secondary filter unit 18 mainly filters based on a solid aluminum electrolytic capacitor. After removing the primary filter unit from the power conversion unit 11, the load capacity of the solid aluminum electrolytic capacitor is limited, but since there is a hardware-type current feedback loop, it can respond immediately to changes in the load current, A charging failure due to an excessive output current of the second adapter can be prevented.

  In the above solution where the primary filter unit is removed, the maximum output current allowed in the constant voltage mode of the second adapter 10 can be determined based on the capacitor capacity in the secondary filter unit. For example, when it is determined that the maximum load current that the secondary filter unit can withstand is 500 mA or 1 A based on the capacitor capacity in the secondary filter unit, the second adapter is set by setting the target current to 500 mA or 1 A. Charging failure due to the output current exceeding the target current can be prevented.

  Optionally, in some embodiments, the second adapter 10 is in a second charging mode that is a constant current mode (ie, the second adapter 10 operates in the second charging mode to operate a charged device (eg, a terminal ) Can be recharged). In the constant current mode, the target voltage is the maximum output voltage allowed by the second adapter 10 in the constant current mode, and the target current is a current corresponding to the constant current mode. Specifically, the power adjustment unit 14 adjusts the output current of the second adapter 10 to a current corresponding to the constant current mode based on the current feedback signal, and the voltage feedback signal is the output voltage of the second adapter 10 is the second adapter. When indicating that the maximum output voltage allowed in the 10 constant current mode has been reached, control is performed so that the output voltage of the second adapter 10 does not exceed the maximum output voltage allowed in the constant current mode of the second adapter 10. It is configured as follows.

  In the embodiment of the present invention, the target current is set to a current corresponding to the constant current mode, and the target voltage is set to the maximum output voltage allowed for the second adapter in the constant current mode. In this way, the second adapter can charge the device to be charged (for example, a terminal) by adjusting the output current of the second adapter to a current corresponding to the constant current mode based on the current feedback loop. In the charging process, when the output voltage of the second adapter reaches the maximum allowable output voltage of the second adapter, the second adapter immediately senses this situation by the voltage feedback loop, and immediately detects the output voltage of the second adapter. Further increase can be prevented and charging failure can be prevented.

  Optionally, as shown in FIG. 2, the second adapter 10 may further include a first adjustment unit 21 based on any of the embodiments described above. The first adjustment unit 21 is connected to the voltage feedback unit 12 and is configured to adjust the value of the target voltage.

  In the embodiment of the present invention, a first adjustment unit capable of adjusting the output voltage of the second adapter according to actual needs is introduced, and the intelligence level of the second adapter is improved. For example, the second adapter 10 is operable in the first charging mode or the second charging mode, and the first adjustment unit 21 is in the first charging mode or the second charging mode currently used by the second adapter 10. Accordingly, the target voltage value can be adjusted.

  Optionally, based on the embodiment of FIG. 2, the voltage feedback unit 12 may include a voltage sampling unit 31 and a voltage comparison unit 32, as shown in FIG. The voltage sampling unit 31 has an input end connected to the power conversion unit 11 and is configured to sample the output voltage of the second adapter 10 to obtain the first voltage. The voltage comparison unit 32 has an input terminal connected to the output terminal of the voltage sampling unit 31, compares the first voltage with the first reference voltage, and determines the voltage based on the comparison result between the first voltage and the first reference voltage. It is configured to generate a feedback signal. The first adjustment unit 21 is connected to the voltage comparison unit 32, supplies the first reference voltage to the voltage comparison unit 32, and realizes the purpose of adjusting the value of the target voltage by adjusting the value of the first reference voltage. be able to.

  In addition, the 1st voltage in embodiment of this invention respond | corresponds with the output voltage of a 2nd adapter, or it is comprised so that the magnitude | size of the present output voltage of a 2nd adapter may be shown. In addition, the first reference voltage in the embodiment of the present invention corresponds to the target voltage or is configured to indicate the magnitude of the target voltage.

  In some embodiments, if the first voltage is less than the first reference voltage, the voltage comparison unit generates a first voltage feedback signal indicating that the output voltage of the second adapter does not reach the target voltage, while the first voltage If the one voltage is equal to the first reference voltage, the voltage comparison unit generates a second voltage feedback signal indicating that the output voltage of the second adapter has reached the target voltage.

  In the embodiment of the present invention, the specific form of the voltage sampling unit 31 is not particularly limited. For example, the voltage sampling unit 31 may be a wiring. In this case, the first voltage is the output voltage of the second adapter. And the first reference voltage is the target voltage. As another example, the voltage sampling unit 31 may include two resistors connected in series that operate as a voltage divider. In this case, the first voltage is a voltage obtained by dividing the voltage by the two resistors. The value of the first reference voltage may be related to the voltage division ratio of the two resistors. Taking the case where the target voltage is 5V as an example, when the output voltage of the second adapter reaches 5V, the first voltage is 0.5V after being divided by the series connection of two resistors, The reference voltage can be set to 0.5V.

  The first adjustment unit 21 in the embodiment of FIG. 3 can adjust the first reference voltage in various forms. Hereinafter, it will be described in detail with reference to FIGS.

  Optionally, in some embodiments, as shown in FIG. 4, the first adjustment unit 21 may include a control unit 41 and a first digital to analog converter (DAC) 42. The first DAC 42 has an input end connected to the control unit 41 and an output end connected to the voltage comparison unit 32. The control unit 41 achieves the purpose of adjusting the value of the first reference voltage through the first DAC 42.

  Specifically, the control unit 41 may be an MCU that can be connected to the first DAC 42 via a DAC port. The MCU outputs a digital signal through the DAC port, and converts the digital signal into an analog signal that is a voltage value of the first reference voltage by the first DAC 42. The DAC has characteristics that the signal conversion speed is high and the accuracy is high. By adjusting the reference voltage with the DAC, the adjustment speed and control accuracy of the reference voltage by the second adapter can be improved.

  Optionally, in some embodiments, the first adjustment unit 21 may include a control unit 51 and an RC filter unit 52, as shown in FIG. The RC filter unit 52 has an input end connected to the control unit 51 and an output end connected to the voltage comparison unit 32. The control unit 51 is configured to adjust the value of the first reference voltage by generating a PWM signal and adjusting the duty ratio of the PWM signal.

  Specifically, the control unit 51 may be an MCU that can output a PWM signal via a PWM port. After the PWM signal is filtered by the RC filter circuit 52, a stable analog quantity, that is, a first reference voltage can be formed. Since the RC filter circuit 52 has characteristics that it is easy to implement and low in cost, the adjustment of the first reference voltage can be realized at a relatively low cost.

  Optionally, in some embodiments, as shown in FIG. 6, the first adjustment unit 21 may include a control unit 61 and a digital potentiometer 62. The digital potentiometer 62 has a control end connected to the control unit 61 and an output end connected to the voltage comparison unit 32. The control unit 61 adjusts the value of the first reference voltage by adjusting the voltage dividing ratio of the digital potentiometer 62.

  Specifically, the control unit 61 may be an MCU, and the MCU can be connected to the control end of the digital potentiometer 62 via an inter integrated circuit (I2C eye square sea) interface. The voltage dividing ratio of the digital potentiometer 62 is adjusted. In the digital potentiometer 62, the high potential end is VDD, that is, the power supply end, the low potential end is grounded, the output end (also referred to as an adjustment output end) is connected to the voltage comparison unit 32, and the voltage comparison unit 32 has a first reference. It is configured to output a voltage. The digital potentiometer is easy to implement and low in cost, and can adjust the first reference voltage at a relatively low cost.

  Optionally, based on the embodiment of FIG. 2, the voltage feedback unit 12 may include a voltage dividing unit 71 and a voltage comparing unit 72, as shown in FIG. The voltage dividing unit 71 is connected to the power conversion unit 11 at an input end, and is configured to divide the output voltage of the second adapter 10 based on a predetermined voltage dividing ratio to generate a first voltage. The voltage comparison unit 72 has an input terminal connected to the output terminal of the voltage dividing unit 71, compares the first voltage with the first reference voltage, and determines the voltage based on the comparison result between the first voltage and the first reference voltage. It is configured to generate a feedback signal. The first adjustment unit 21 is connected to the voltage dividing unit 71 and adjusts the voltage value of the target voltage by adjusting the voltage dividing ratio of the voltage dividing unit 71.

The difference between the embodiment of FIG. 7 and the embodiment of FIGS. 3 to 6 is that the embodiment of FIGS. 3 to 6 mainly adjusts the voltage value of the target voltage by adjusting the reference voltage of the voltage comparison unit. The embodiment shown in FIG. 7 is to realize the adjustment of the voltage value of the target voltage by adjusting the voltage dividing ratio of the voltage dividing unit 71. In other words, in the embodiment of FIG. 7, if the first reference voltage can be set to a fixed value V REF and the output voltage of the second adapter is desired to be 5V, the output voltage of the second adapter is 5V. The voltage dividing ratio of the voltage dividing unit 71 can be adjusted so that the voltage at the output terminal of the voltage dividing unit 71 becomes equal to V REF . Similarly, if the output voltage of the second adapter is desired to be 3V, the output voltage of the voltage dividing unit 71 is equal to V REF when the output voltage of the second adapter is 3V. The partial pressure ratio of the pressure unit 71 can be adjusted.

  The embodiment of the present invention realizes sampling of the output voltage of the second adapter and adjustment of the voltage value of the target voltage by the voltage dividing unit, and simplifies the circuit structure of the second adapter.

  The voltage dividing unit 71 according to the embodiment of the present invention can be implemented in various forms. For example, the function of adjusting the voltage dividing ratio and the voltage dividing ratio can be realized by a digital potentiometer, or an element such as a discrete resistor or a switch. it can.

  Taking the embodiment of the digital potentiometer as an example, as shown in FIG. 8, the voltage dividing unit 71 may include a digital potentiometer 81. The first adjustment unit 21 may include a control unit 82. The digital potentiometer 81 has a high potential end connected to the power conversion unit 11, a low potential end grounded, and an output end connected to the input end of the voltage comparison unit 72. The control unit 82 is connected to the control end of the digital potentiometer 81 and is configured to adjust the voltage division ratio of the digital potentiometer 81.

  The voltage comparison unit 72 described above can be implemented in various forms. In some embodiments, as shown in FIG. 9, the voltage comparison unit 72 may include a first operational amplifier. The first operational amplifier includes a negative-phase input terminal that receives a first voltage, an in-phase input terminal that receives a first reference voltage, and an output terminal that generates a voltage feedback signal. The first operational amplifier may be referred to as a first error amplifier or a voltage error amplifier.

  Optionally, as shown in FIG. 10, based on any of the embodiments described above, the second adapter 10 is connected to the current feedback unit 13 and is configured to adjust the current value of the target current. Two adjustment units 101 may be further included.

  In the embodiment of the present invention, a second adjustment unit capable of adjusting the output current of the second adapter according to actual needs is introduced to improve the intelligence level of the second adapter. For example, the second adapter 10 is operable in the first charging mode or the second charging mode, and the second adjustment unit 101 is in the first charging mode or the second charging mode currently used by the second adapter 10. Based on this, the current value of the target current is adjusted.

  Optionally, in some embodiments, based on the embodiment of FIG. 10, the current feedback unit 13 may include a current sampling unit 111 and a current comparison unit 112, as shown in FIG. The current sampling unit 111 has an input terminal connected to the power conversion unit 11 and is configured to sample the output current of the second adapter 10 to obtain a second voltage indicating the magnitude of the output current of the second adapter 10. ing. The current comparison unit 112 has an input terminal connected to the output terminal of the current sampling unit 111, compares the second voltage with the second reference voltage, and determines the current based on the comparison result between the second voltage and the second reference voltage. It is configured to generate a feedback signal. The second adjustment unit 101 is connected to the current comparison unit 112, supplies the second reference voltage to the current comparison unit 112, and adjusts the current value of the target current by adjusting the voltage value of the second reference voltage.

  In addition, the 2nd voltage which concerns on embodiment of this invention respond | corresponds to the output current of a 2nd adapter, or shows the magnitude | size of the output current of a 2nd adapter. The second reference voltage according to the embodiment of the present invention corresponds to the target current or indicates the magnitude of the target current.

  Specifically, if the second voltage is less than the second reference voltage, the current comparison unit generates a first current feedback signal indicating that the output current of the second adapter does not reach the target current, while the second voltage is If equal to the second reference voltage, the current comparison unit generates a second current feedback signal indicating that the output current of the second adapter has reached the target current.

  The current sampling unit 111 can acquire the second voltage as follows. Specifically, the current sampling unit 111 first samples the output current of the second adapter, obtains the sampling current, and then converts the sampling current to a corresponding sampling voltage based on the magnitude of the sampling current (sampling voltage value). = Sampling current value x Sampling resistance). In some embodiments, the sampling voltage can be directly the second voltage. In another embodiment, the voltage after the sampling voltage is divided by a plurality of resistors may be the second voltage. Specifically, the current sampling function in the current sampling unit 111 can be realized by a galvanometer.

  The second adjustment unit in the embodiment of FIG. 11 can adjust the second reference voltage in various forms. Hereinafter, this will be described in detail with reference to FIGS.

  Optionally, in some embodiments, the second adjustment unit 101 may include a control unit 121 and a second DAC 122, as shown in FIG. The second DAC 122 has an input terminal connected to the control unit 121 and an output terminal connected to the current comparison unit 112. The control unit 121 adjusts the voltage value of the second reference voltage through the second DAC 122.

  Specifically, the control unit 121 may be an MCU that can be connected to the second DAC 122 via a DAC port. The MCU outputs a digital signal via the DAC port, and converts the digital signal into an analog signal by the second DAC 122. The analog signal is a voltage value of the first reference voltage. The DAC has characteristics that the signal conversion speed is high and the accuracy is high. By adjusting the reference voltage with the DAC, the adjustment speed and control accuracy of the reference voltage by the second adapter can be improved.

  Optionally, in some embodiments, as shown in FIG. 13, the second adjustment unit 101 may include a control unit 131 and an RC filter unit 132. The RC filter unit 132 has an input end connected to the control unit 131 and an output end connected to the current comparison unit 112. The control unit 131 is configured to adjust the voltage value of the second reference voltage by generating a PWM signal and adjusting the duty ratio of the PWM signal.

  Specifically, the control unit 131 may be an MCU that can output a PWM signal via a PWM port. After the PWM signal is filtered by the RC filter circuit 132, a stable analog quantity, that is, a second reference voltage can be formed. Since the RC filter circuit 132 has characteristics that it is easy to implement and low in cost, the second reference voltage can be adjusted at a relatively low cost.

  Optionally, in some embodiments, as shown in FIG. 14, the second adjustment unit 101 may include a control unit 141 and a digital potentiometer 142. The digital potentiometer 142 has a control end connected to the control unit 141 and an output end connected to the current comparison unit 112. The control unit 141 adjusts the voltage value of the second reference voltage by adjusting the voltage division ratio of the digital potentiometer 142.

  In some embodiments, the control unit 141 may be an MCU. The MCU is configured to adjust the voltage division ratio of the digital potentiometer 142 that can be connected to the control end of the digital potentiometer 142 via the I2C interface. In the digital potentiometer 142, the high potential end is VDD, that is, the power supply end, the low potential end is grounded, the output end (also referred to as the adjustment output end) is connected to the voltage comparison unit 112, and the current comparison unit 112 is connected to the second reference. It is configured to output a voltage. The digital potentiometer is easy to implement and low in cost, and can adjust the second reference voltage at a relatively low cost.

  Optionally, in some embodiments, based on the FIG. 10 embodiment, as shown in FIG. 15, the current feedback unit 13 may include a current sampling unit 151, a voltage dividing unit 152, and a current comparison unit 153. . The current sampling unit 151 is connected to the power conversion unit 11 at the input end, and is configured to sample the output current of the second adapter 10 to obtain a third voltage indicating the magnitude of the output current of the second adapter 10. ing. The voltage dividing unit 152 has an input terminal connected to the output terminal of the current sampling unit 151, and is configured to divide the third voltage based on a predetermined voltage dividing ratio to generate the second voltage. The current comparison unit 153 has an input terminal connected to the output terminal of the voltage dividing unit 152, compares the second voltage with the second reference voltage, and determines the current based on the comparison result between the second voltage and the second reference voltage. It is configured to generate a feedback signal. The second adjusting unit 101 is connected to the voltage dividing unit 152 and adjusts the current value of the target current by adjusting the voltage dividing ratio of the voltage dividing unit 152.

The difference between the embodiment of FIG. 15 and the embodiment of FIGS. 11 to 14 is that the embodiment of FIGS. 11 to 14 mainly adjusts the current value of the target current by adjusting the reference voltage of the current comparison unit. The embodiment shown in FIG. 15 is to realize the adjustment of the current value of the target current by adjusting the voltage dividing ratio of the voltage dividing unit 152. In other words, in the embodiment of FIG. 15, if the second reference voltage can be set to a fixed value V REF and the output current of the second adapter is desired to be 300 mV, the output current of the second adapter is 300 mV. The voltage dividing ratio of the voltage dividing unit 152 can be adjusted so that the voltage at the output terminal of the voltage dividing unit 152 becomes equal to V REF . Similarly, if the output current of the second adapter is desired to be 500 mV, the output voltage of the voltage dividing unit 152 is equal to V REF when the output current of the second adapter is 500 mV. The partial pressure ratio of the pressure unit 152 can be adjusted.

  The voltage dividing unit 152 according to the embodiment of the present invention can be implemented in various forms. For example, the function of adjusting the voltage dividing ratio and the voltage dividing ratio can be realized by a digital potentiometer, or an element such as a discrete resistor or a switch. it can.

  Taking the embodiment of the digital potentiometer as an example, as shown in FIG. 16, the voltage dividing unit 152 includes a digital potentiometer 161, and the second adjustment unit 101 includes a control unit 162. The digital potentiometer 161 has a high potential end connected to the output end of the current sampling unit 151, a low potential end grounded, and an output end connected to the input end of the current comparison unit 153. The control unit 162 is connected to the control end of the digital potentiometer 161 and is configured to adjust the voltage division ratio of the digital potentiometer 161.

  The control unit described above may be a single control unit or a plurality of control units. In some embodiments, the control units in the first adjustment unit and the second adjustment unit described above are the same control unit.

  The current comparison unit 153 described above can be implemented in various forms. In some embodiments, as shown in FIG. 17, the current comparison unit 153 may include a second operational amplifier. The second operational amplifier includes a negative-phase input terminal that receives a second voltage, an in-phase input terminal that receives a second reference voltage, and an output terminal that generates a current feedback signal. The second operational amplifier may be referred to as a second error amplifier or a current error amplifier.

  The embodiment of the voltage feedback unit 12 and the current feedback unit 13 and the adjustment mode of the target voltage corresponding to the voltage feedback unit 12 and the target current corresponding to the current feedback unit 13 are described in detail above with reference to FIGS. explained. Hereinafter, an embodiment of the power adjustment unit 14 will be described in detail with reference to FIG.

  Optionally, in some embodiments, as shown in FIG. 18, the voltage feedback unit 12 includes a first operational amplifier (not shown in FIG. 18) with an output configured to output a voltage feedback signal. Specifically, see FIG. 9). The current feedback unit 13 may include a second operational amplifier (not shown in FIG. 18 and specifically refer to FIG. 17) having an output configured to output a current feedback signal. The power adjustment unit 14 may include a first diode D 1, a second diode D 2, a photoelectric coupling unit 181, and a PWM control unit 182. The output terminal of the first operational amplifier of the voltage feedback unit 12 (refer to FIG. 9, the output terminal of the first operational amplifier is configured to output a voltage feedback signal) is connected to the cathode of the first diode D1. Has been. The anode of the first diode D1 is connected to the input terminal of the photoelectric coupling unit 181. The output terminal of the second operational amplifier of the current feedback unit 13 (refer to FIG. 17, the output terminal of the second operational amplifier is configured to output a current feedback signal) is connected to the cathode of the second diode D2. Has been. The anode of the second diode D2 is connected to the input end of the photoelectric coupling unit 181. The output end of the photoelectric coupling unit 181 is connected to the input end of the PWM control unit 182. The output end of the PWM control unit 182 is connected to the power conversion unit 11.

  Note that the first operational amplifier in this specification may refer to the same operational amplifier. Similarly, the second operational amplifier in this specification may refer to the same operational amplifier.

  Specifically, in the present embodiment, the voltage signal output from the first operational amplifier is a voltage feedback signal, and the voltage signal output from the second operational amplifier is a current feedback signal. If the voltage signal output from the first operational amplifier is 0, it indicates that the output voltage of the second adapter has reached the target voltage, while if the voltage signal output from the second operational amplifier is 0, 2 Indicates that the output current of the adapter has reached the target current. The first diode D1 and the second diode D2 are two diodes connected in antiparallel. When the voltage signal output from either the first operational amplifier or the second operational amplifier is 0, the voltage at the feedback point in FIG. 18 is about 0 (a constant voltage difference is necessary to make the diode conductive). Therefore, the actual voltage at the feedback point is a value slightly greater than 0, eg, 0.7V). In this case, the photoelectric coupling unit 181 operates in a stable state and outputs a stable voltage signal to the PWM control unit 182. Thereafter, the PWM control unit 182 generates a PWM control signal having a constant duty ratio, and stabilizes the output voltage and output current of the second adapter by the power conversion unit 11. In other words, when one of the output voltage and the output current of the second adapter reaches the target value, the first diode D1 and the second diode D2 connected in anti-parallel immediately sense this situation. Further, the output voltage and output current of the second adapter are stabilized.

  Optionally, in some embodiments, the second adapter 10 is operable in a first charging mode and a second charging mode, and a charging rate for a charged device (eg, a terminal) in the second charging mode is first. It is faster than the charging speed for a charged device (for example, a terminal) in one charging mode. In other words, compared to the second adapter 10 that operates in the first charging mode, the second adapter 10 that operates in the second charging mode fully charges the battery in the charged device (eg, terminal) having the same capacity. Takes less time.

  The second adapter 10 includes a control unit. In the process in which the second adapter 10 is connected to the charged device (for example, terminal), the control unit controls the charging process in the second charging mode by performing bidirectional communication with the charged device (for example, terminal). To do. The control unit may be the control unit in any of the above-described embodiments, and may be, for example, the control unit in the first adjustment unit or the control unit in the second adjustment unit.

  The first charging mode may be a normal charging mode, and the second charging mode may be a quick charging mode. The normal charging mode means that a relatively small current value (generally less than 2.5 A) is output from the second adapter, or a device to be charged (for example, less than 15 W) (for example, less than 15 W) , Terminal) means charging a battery. Generally, several hours are required to fully charge a large-capacity battery (for example, a battery with a capacity of 3000 mAh) in the normal charging mode. On the other hand, in the fast charge mode, the second adapter outputs a relatively large current (typically greater than 2.5A, eg, 4.5A, 5A and more) or relatively large power (typically , 15 W or more) to charge the battery in the device to be charged (for example, terminal). Compared to the normal charging mode, the second adapter can obviously shorten the charging time required to fully charge a battery of the same capacity in the quick charging mode, and increase the charging speed.

  In the embodiment of the present invention, the communication content between the control unit of the second adapter and the device to be charged (for example, the terminal) and the form in which the control unit controls the output of the second adapter in the second charging mode are not particularly limited. For example, the control unit communicates with a charged device (eg, a terminal), exchanges the current voltage or current amount of battery in the charged device (eg, terminal), and the current voltage or current of the battery. The output voltage or output current of the second adapter can be adjusted based on the amount of electricity. Hereinafter, with reference to specific embodiments, the communication contents between the control unit and the device to be charged (for example, the terminal), and the mode in which the control unit controls the output of the second adapter in the second charging mode, explain in detail.

  Optionally, in some embodiments, the control unit controls the output of the second adapter in the second charging mode by performing bi-directional communication with a charged device (eg, a terminal). However, it may include negotiating a charging mode between the second adapter and the charged device (eg, terminal) by performing bidirectional communication with the charged device (eg, terminal).

  In an embodiment of the present invention, the second adapter does not indiscriminately charge the charged device (eg, terminal) in the second charging mode but performs bidirectional communication with the charged device (eg, terminal). Thus, it is possible to improve the safety of the charging process by negotiating whether or not the second adapter can rapidly charge the charged device (for example, the terminal) in the second charging mode.

  Specifically, the control unit negotiates the charging mode between the second adapter and the charged device (eg, terminal) by performing bidirectional communication with the charged device (eg, terminal). The unit transmits a first instruction to a device to be charged (for example, a terminal); receives a response instruction for the first instruction transmitted from the device to be charged (for example, a terminal); If the device to be charged (eg, terminal) agrees to enable the second charging mode, the control unit may include charging the device to be charged (eg, terminal) in the second charging mode. . Here, the first instruction is configured to inquire whether or not the device to be charged (for example, the terminal) enables the second charging mode, and the response instruction is for the device to be charged (for example, the terminal). Is configured to indicate whether or not to agree to enable the second charging mode.

  The above description of the embodiment of the present invention does not limit the master-slave relationship between the second adapter (or the control unit of the second adapter) and the charged device (for example, a terminal). In other words, either one of the control unit and the charged device (eg, terminal) can initiate a two-way communication session as a master device, whereas the other is a slave device (slavedevice). The first response or the first response can be made for the communication started by the master device. As a possible embodiment, the roles of the master device and the slave device may be confirmed in the communication process by comparing the level on the second adapter side with respect to ground and the level on the charged device (eg, terminal) side with respect to ground. .

  In the embodiment of the present invention, a specific embodiment of bidirectional communication between the second adapter (or the control unit of the second adapter) and the charged device (for example, a terminal) is not limited. That is, either one of the second adapter (or the control unit of the second adapter) and the charged device (for example, a terminal) starts a communication session as a master device, while the other is a slave device. When the master device makes a first response or a first response to the communication session started by the master device, and the master device makes a second response to the first response or the first response by the slave device, One cycle of the charging mode negotiation process with the slave device is considered complete. In a possible embodiment, after the multi-cycle charging mode negotiation is completed between the master device and the slave device, the charging operation between the master device and the slave device is performed, so that the charging process after the negotiation is performed safely. Ensure reliability and reliability.

  As one form in which the master device can make a second response in response to the first response or the first response of the slave device to the communication session, the master device can send the first response or the first response of the slave device to the communication session. And a second response corresponding to the received first response or first response of the slave device can be performed. For example, when the master device receives the first response or the first response of the slave device for the communication session within a predetermined time, the second response corresponding to the first response or the first response of the slave device. Is performed as follows. Specifically, the master device and the slave device perform the charging operation in the first charging mode or the second charging mode according to the negotiation result after one cycle of the charging mode negotiation is completed, that is, the second adapter negotiates. Depending on the result, the device to be charged (for example, a terminal) is charged by operating in the first charging mode or the second charging mode.

  As another mode in which the master device can make a second response in response to the first response or the first response of the slave device with respect to the communication session, the master device can perform the second response of the slave device with respect to the communication session within a predetermined time. Even if the first response or the first response is not received, the second response corresponding to the first response or the first response of the slave device is performed. Illustratively, the master device does not receive the first response or the first response of the slave device for the communication session within a predetermined time, and the second corresponding to the first response or the first response of the slave device. The response is made as follows. Specifically, the master device and the slave device perform the charging operation in the first charging mode after one cycle of the charging mode negotiation is completed, that is, the second adapter is charged in the first charging mode (for example, the charged device (for example, , Device).

  Optionally, in some embodiments, a charged device (eg, a terminal) initiates a communication session as a master device and a second adapter (or control unit of the second adapter) is initiated by the master device as a slave device. After performing the first response or the first response to the communication session, the charged device (for example, the terminal) does not perform the second response corresponding to the first response or the first response of the second adapter, It is considered that one cycle of the charging mode negotiation process is completed between the second adapter (or the control unit of the second adapter) and the device to be charged (for example, a terminal). Furthermore, the second adapter can charge a device to be charged (for example, a terminal) in the first charging mode or the second charging mode according to the negotiation result.

  Optionally, in some embodiments, the control unit controls the output of the second adapter in the second charging mode by performing bi-directional communication with a charged device (eg, a terminal). Determining a charging voltage for charging the charged device (eg, terminal) output from the second adapter in the second charging mode by performing bidirectional communication with the charged device (eg, terminal); The control unit sets the voltage value of the target voltage so that the voltage value of the target voltage is equal to the charging voltage for charging the charged device (eg, terminal) output from the second adapter in the second charging mode. Adjusting.

  Specifically, charging for charging the device to be charged (for example, terminal) output from the second adapter in the second charging mode by the control unit performing bidirectional communication with the device to be charged (for example, terminal). The voltage is determined by the control unit transmitting a second instruction to the charged device (eg, terminal) and the control unit responding to the second instruction transmitted from the charged device (eg, terminal). Receiving instructions. Here, the second instruction is configured to inquire whether or not the output voltage of the second adapter matches the current voltage of the battery of the device to be charged (for example, the terminal), and a response instruction of the second instruction. Is configured to indicate whether the output voltage of the second adapter matches the current voltage of the battery or is higher or lower than the current voltage of the battery. Alternatively, is the second instruction appropriate as the charging voltage for charging the charged device (eg, terminal) output from the second adapter in the second charging mode when the current output voltage of the second adapter is in the second charging mode? Can be configured to query whether or not. The response instruction of the second instruction may be configured to indicate whether the output voltage of the second adapter is appropriate or high or low. The current output voltage of the second adapter matches the current voltage of the battery, or the device to be charged (for example, the terminal) in which the current output voltage of the second adapter is output from the second adapter in the second charging mode. A suitable charging voltage for charging is that the current output voltage of the second adapter is slightly higher than the current voltage of the battery and the difference between the output voltage of the second adapter and the current voltage of the battery. May be in a predetermined range (generally several hundred mV).

  Optionally, in some embodiments, the control unit controls the output of the second adapter in the second charging mode by performing bi-directional communication with a charged device (eg, a terminal). Determining a charging current for charging the charged device (eg, terminal) output from the second adapter in the second charging mode by performing bidirectional communication with the charged device (eg, terminal). The current value of the target current so that the current value of the target current is equal to the charging current for charging the charged device (eg, terminal) output from the second adapter in the second charging mode. Adjusting.

  Specifically, charging for charging the device to be charged (for example, terminal) output from the second adapter in the second charging mode by the control unit performing bidirectional communication with the device to be charged (for example, terminal). Determining the current means that the control unit transmits a third instruction to the device to be charged (for example, a terminal) and a response of the third instruction transmitted from the device to be charged (for example, the terminal). Receiving the instruction, and the control unit based on the maximum charging current currently supported by the device to be charged (e.g. terminal) (e.g. the device to be charged output from the second adapter in the second charging mode (e.g. Determining a charging current for charging the terminal. Here, the third instruction is configured to inquire about the maximum charging current currently supported by the device to be charged (eg, terminal), and the response instruction of the third instruction is the device to be charged (eg, terminal). Is configured to indicate the maximum charging current currently supported. In addition, the control unit may be charged in various forms (for example, a charged device (for example, a terminal) output from the second adapter in the second charging mode based on the maximum charging current currently supported by the charged device (for example, a terminal)). The charging current for charging the terminal can be determined. For example, the second adapter charges the charged device (eg, terminal) output from the second adapter in the second charging mode with the maximum charging current currently supported by the charged device (eg, terminal). The charging current of the second charging mode in consideration of factors such as the maximum charging current currently supported by the device to be charged (eg, the terminal) and its own current output capability. You may determine the charging current for charging the to-be-charged apparatus (for example, terminal) output from the adapter.

  Optionally, in some embodiments, the control unit controls the output of the second adapter in the second charging mode by performing bi-directional communication with a charged device (eg, a terminal). In the process in which the adapter charges the device to be charged (for example, terminal) in the second charging mode, the control unit performs two-way communication with the device to be charged (for example, terminal). Adjusting the output current may be included.

  Specifically, adjusting the output current of the second adapter by the control unit performing two-way communication with the device to be charged (for example, a terminal) means that the control unit is connected to the device to be charged (for example, the terminal). 4 instructions are transmitted, the control unit receives a response instruction of the fourth instruction transmitted from the second adapter, and the control unit outputs the output current of the second adapter according to the current voltage of the battery. Adjusting. Here, the fourth instruction is configured to inquire about the current voltage of the charged device (eg, terminal) battery, and the response instruction of the fourth instruction is configured to indicate the current voltage of the battery. Yes.

  Optionally, in some embodiments, the second adapter 10 includes a charging interface 191 as shown in FIG. 19A. Further, in some embodiments, the control unit (MCU in FIG. 23) in the second adapter 10 performs bidirectional communication with a device to be charged (for example, a terminal) via the data line 192 in the charging interface 191. be able to.

  Optionally, in some embodiments, the control unit controls the output of the second adapter in the second charging mode by performing two-way communication with a charged device (eg, a terminal). The method may include determining whether or not a contact failure has occurred in the charging interface by performing bidirectional communication with a device to be charged (for example, a terminal).

  Specifically, the control unit determines whether or not a contact failure has occurred in the charging interface by performing two-way communication with a charged device (for example, a terminal). Transmitting a fourth instruction to the terminal), receiving a response instruction of the fourth instruction transmitted from the charged device (for example, the terminal), and controlling the output voltage of the second adapter. And determining whether a contact failure has occurred at the charging interface based on the current voltage of the device to be charged (eg, terminal) battery. Here, the fourth instruction is configured to inquire the current voltage of the charged device (eg, terminal) battery, and the response instruction of the fourth instruction is the current instruction of the charged device (eg, terminal) battery. It is configured to show voltage. For example, when the control unit determines that the voltage difference between the output voltage of the second adapter and the current voltage of the device to be charged (eg, terminal) is higher than a predetermined voltage threshold, the voltage difference is output from the second adapter. It can be determined that the impedance divided by the current value is larger than a predetermined impedance threshold, that is, that a contact failure has occurred in the charging interface.

  Optionally, in some embodiments, poor contact at the charging interface can be determined by a charged device (eg, a terminal). Specifically, the determination is based on the fact that the charged device (for example, terminal) transmits the sixth instruction to the control unit, and the response instruction for the sixth instruction transmitted by the charged device (for example, terminal) from the control unit. And whether the device to be charged (for example, the terminal) has caused a contact failure in the charging interface based on the current voltage of the battery to be charged (for example, the terminal) battery and the output voltage of the second adapter. Determining. Here, the sixth instruction is configured to inquire about the output voltage of the second adapter, and the response instruction of the sixth instruction is configured to indicate the output voltage of the second adapter. After determining that the device to be charged (for example, the terminal) has caused a contact failure in the charging interface, the device to be charged (for example, the terminal) transmits a fifth instruction indicating that the contact failure has occurred in the charging interface to the control unit. To do. After receiving the fifth instruction, the control unit controls the second adapter so that the second adapter ends the second charging mode.

  Hereinafter, the communication process between the control unit in the second adapter and the device to be charged (for example, a terminal) will be described in more detail with reference to FIG. 19B. Note that the example of FIG. 19B is merely for those skilled in the art to understand the embodiments of the present invention, and does not limit the embodiments of the present invention to specific numerical values or specific scenarios illustrated. It should be. It is obvious that various equivalent modifications or changes made by those skilled in the art based on the example described in FIG. 19B belong to the scope according to the embodiment of the present invention.

  As illustrated in FIG. 19B, the process of charging the charged device (for example, the terminal) by the output of the second adapter in the second charging mode, that is, the charging process may include the following five stages.

<Stage 1>
After the device to be charged (for example, a terminal) is connected to the power supply device, the type of the power supply device can be detected by the data lines D + and D−. When it is detected that the power supply device is the second adapter, the current drawn by the charged device (for example, the terminal) may be larger than a predetermined current threshold I2 (for example, may be 1A). When the control unit in the second adapter detects that the output current of the second adapter in a predetermined period (for example, it may be the continuous time T1) is I2 or more, the control unit ) To complete the identification of the type of the power supply device, start a negotiation process between the second adapter and the device to be charged (eg, terminal), By transmitting (corresponding to the first instruction), an inquiry is made as to whether or not the device to be charged (for example, the terminal) agrees to charge the device to be charged (for example, the terminal) in the two charging mode by the second adapter.

  The control unit receives an instruction 1 response instruction transmitted from a device to be charged (for example, a terminal), and the instruction to respond to the instruction 1 is the second charging mode in which the apparatus to be charged (for example, the terminal) is in the second charging mode by the second adapter. The control unit redetects the output current of the second adapter if it indicates that it does not agree with the charging of the device to be charged (eg, terminal). If the output current of the second adapter is still greater than or equal to I2 within a predetermined continuous period (eg, may be continuous time T1), the control unit retransmits instruction 1 to the device to be charged (eg, terminal), An inquiry is made as to whether or not the device to be charged (eg, terminal) agrees to charge the device to be charged (eg, terminal) in the second charging mode by the second adapter. In the control unit, the device to be charged (for example, the terminal) agrees to charge the device to be charged (for example, the terminal) in the second charging mode by the second adapter, or the output current of the second adapter is I2 or more. Repeat step 1 above until the requirement is not met.

  If the device to be charged (eg, terminal) agrees that the second adapter will charge the device to be charged (eg, terminal) in the second charging mode, the communication process proceeds to the second stage.

<Stage 2>
The output voltage of the second adapter may include multiple levels. The control unit transmits instruction 2 (corresponding to the second instruction) to the device to be charged (for example, terminal), so that the output voltage (current output voltage) of the second adapter becomes the device to be charged (for example, terminal) ) Query whether it matches the current voltage of the battery.

  The charged device (eg, terminal) transmits an instruction 2 response instruction to the control unit, so that the output voltage of the second adapter matches the current voltage of the charged device (eg, terminal) battery, or Indicates whether the current voltage of the battery is higher or lower. If the response instruction to instruction 2 indicates that the output voltage of the second adapter is high or low, the control unit adjusts the output voltage of the second adapter by one level, and re-instructs instruction 2 on the device to be charged (eg, terminal). And inquire again whether the output voltage of the second adapter matches the current voltage of the charged device (eg, terminal) battery. If the device to be charged (eg, terminal) repeats the above step 2 until it determines that the output voltage of the second adapter matches the current voltage of the device to be charged (eg, terminal) battery, The process proceeds to the third stage.

<Stage 3>
The control unit transmits instruction 3 (corresponding to the third instruction) to the device to be charged (for example, terminal) and inquires about the maximum charging current currently supported by the device to be charged (for example, terminal). The device to be charged (eg terminal) indicates the maximum charging current currently supported by the device to be charged (eg terminal) by sending a response instruction 3 instruction to the control unit and proceeds to the fourth stage To do.

<Stage 4>
The control unit is for charging the charged device (eg, terminal) output from the second adapter in the second charging mode according to the maximum charging current currently supported by the charged device (eg, terminal). After determining the charging current, the process proceeds to stage 5, that is, the constant current charging stage.

<Stage 5>
After shifting to the constant current charging stage, the control unit transmits the instruction 4 (corresponding to the fourth instruction) to the apparatus to be charged (for example, the terminal) at regular time intervals, and the apparatus to be charged (for example, Terminal) can query the current voltage of the battery. The charged device (for example, terminal) can feed back the current voltage of the charged device (for example, terminal) battery by transmitting a response instruction of instruction 4 to the control unit. The control unit determines whether the charging interface is in good contact and whether the output current of the second adapter needs to be reduced based on the current voltage of the charged device (eg, terminal) battery. be able to. The second adapter can transmit instruction 5 (corresponding to the fifth instruction) to the device to be charged (for example, the terminal) when the charging interface determines that the contact is poor, and the second adapter After exiting the mode, reset and go to Step 1 again.

  Optionally, in some embodiments, in stage 1, when the charged device (eg, terminal) transmits an instruction 1 response instruction, the instruction 1 response instruction includes a charged device (eg, terminal). ) Path impedance data (or information). The path impedance data of the device to be charged (eg, terminal) is configured to determine in step 5 whether the charging interface is in good contact.

  Optionally, in some embodiments, in stage 2, the charged device (eg, terminal) from when the second adapter agrees to charge the charged device (eg, terminal) in the second charging mode. The time until the control unit adjusts the output voltage of the second adapter to an appropriate charging voltage can be controlled within a certain range. When the time exceeds a predetermined range, the second adapter or the device to be charged (for example, the terminal) can determine that an abnormality has occurred in the quick charging communication process, and resets and proceeds to Step 1 again.

  Optionally, in some embodiments, in stage 2, the output voltage of the second adapter may be set to ΔV (ΔV may be 200-500 mV) from the current voltage high of the charged device (eg, terminal) battery. ) When it becomes higher, the charged device (eg, terminal) sends a response instruction 2 instruction to the control unit, so that the output voltage of the second adapter matches the battery voltage of the charged device (eg, terminal). Indicates to do.

  Optionally, in some embodiments, in stage 4, the adjustment speed of the output current of the second adapter may be controlled within a certain range, and thus the second charging mode due to excessive adjustment speed. Thus, it is possible to prevent the occurrence of an abnormality in the charging process of the charged device (for example, the terminal) by the output of the second adapter.

  Optionally, in some embodiments, in step 5, the output current variation of the second adapter may be controlled within 5%.

  Optionally, in some embodiments, in step 5, the control unit can monitor the path impedance of the charging circuit in real time. Specifically, the control unit may monitor the path impedance of the charging circuit based on the output voltage of the second adapter, the output current, and the current voltage of the battery fed back from the charged device (eg, terminal). it can. When the path impedance of the charging circuit is larger than the sum of the path impedance of the device to be charged (for example, terminal) and the impedance of the charging cable (“path impedance of the charging circuit”> “path impedance of the device to be charged (for example, terminal)” "+" Impedance of charging cable "), the charging interface can determine that the contact is poor, and the second adapter stops charging the device to be charged (for example, the terminal) in the second charging mode.

  Optionally, in some embodiments, the second adapter enables charging of the charged device (eg, terminal) in the second charging mode, and then the control unit and the charged device (eg, terminal). The communication time interval can be controlled within a certain range, and the occurrence of an abnormality in the communication process due to an excessive communication interval can be prevented.

  Optionally, in some embodiments, stopping the charging process (or stopping the charging process to the charged device (eg, terminal) in the second charging mode by the second adapter) is a recoverable stop and recovery. There are two types of stoppages that are impossible.

  For example, when a device to be charged (for example, a terminal) detects a full charge of a battery or a contact failure of a charging interface, the charging process is stopped, the charging communication process is reset, and the charging process shifts to Step 1 again. After that, if the charged device (eg, terminal) does not agree that the second adapter charges the charged device (eg, terminal) in the second charging mode, the communication process does not move to stage 2. In this case, the stop of the charging process can be regarded as an unrecoverable stop.

  As another example, when a communication abnormality occurs between the control unit and the device to be charged (for example, a terminal), the charging process is stopped, the charging communication process is reset, and the charging process proceeds to Step 1 again. After meeting stage 1 requirement, the charged device (eg, terminal) agrees that the second adapter will charge the charged device (eg, terminal) in the second charging mode to restore the charging process. To do. In this case, stopping the charging process can be considered as a recoverable stop.

  As another example, when a device to be charged (for example, a terminal) detects the occurrence of a battery abnormality, the charging process is stopped, the charging communication process is reset, and the charging process proceeds to Step 1 again. Thereafter, the charged device (eg, terminal) does not agree that the second adapter charges the charged device (eg, terminal) in the second charging mode. After the battery recovers normally and meets the requirements of Step 1, the charged device (eg, terminal) agrees that the second adapter charges the charged device (eg, terminal) in the second charging mode. To do. In this case, the stop of the quick charge process can be regarded as a recoverable stop.

  Note that the communication steps or operations shown in FIG. 19B are merely examples. For example, in Step 1, after the charged device (eg, terminal) is connected to the second adapter, the handshake communication between the charged device (eg, terminal) and the control unit is performed by the charged device (eg, terminal). Terminal). That is, the device to be charged (for example, a terminal) transmits instruction 1 and inquires whether or not the control unit enables the second charging mode. When the device to be charged (eg, terminal) receives the control unit's reply instruction indicating that the control unit agrees to charge the device to be charged (eg, terminal) in the second charging mode by the second adapter, The second adapter starts charging the battery of the device to be charged (for example, the terminal) in the second charging mode.

  As another example, after stage 5, a constant voltage charging stage may be included. Specifically, in stage 5, the device to be charged (eg, terminal) feeds back the current voltage of the battery to the control unit, and if the current voltage of the battery reaches the voltage threshold for constant voltage charging, the charging stage is: Switch from constant current charging stage to constant voltage charging stage. In the constant voltage charging stage, the charging current gradually decreases and decreases to a certain threshold value, indicating that the entire charging process is completed and that the battery of the charged device (eg, terminal) is fully charged.

  Optionally, in some embodiments, the output current of the second adapter is either pulsating direct current (unidirectional pulsating output current, pulsating waveform current, or steamed-bun shaped current). Called). The waveform of the pulsating direct current is shown in FIG.

  As the output power of the second adapter increases, the second adapter tends to cause a phenomenon of lithium deposition in the battery when charging the battery in the device to be charged (for example, a terminal), and thus reduces the service life of the battery. In order to improve the flexibility and safety of the battery, in the embodiment of the present invention, the second adapter is controlled to output pulsating direct current. Pulsating direct current can reduce the probability and intensity of contact arcing at the charging interface and improve the life of the charging interface. The output current of the second adapter can be set to pulsating direct current in various forms. For example, the output current of the second adapter can be set to pulsating direct current by removing the secondary filter unit in the power conversion unit 11, rectifying the secondary current, and outputting the current as it is to generate pulsating direct current.

  Furthermore, as shown in FIG. 21, based on any of the above-described embodiments, the second adapter 10 can operate in the first charging mode and the second charging mode, and the charged device in the second charging mode ( For example, the charging speed for the terminal is faster than the charging speed for the charged device (for example, the terminal) in the first charging mode. The power conversion unit 11 may include a secondary filter unit 211, and the second adapter 10 may include a control unit 212. The control unit 212 is connected to the secondary filter unit 211. In the first charging mode, the control unit 212 controls the secondary filter unit 211 to operate, whereby the voltage value of the output voltage of the second adapter 10 is kept constant. In the second charging mode, the control unit 212 performs control to stop the operation of the secondary filter unit 211, whereby the output current of the second adapter 10 becomes a pulsating direct current.

  In the embodiment of the present invention, the control unit controls whether or not the secondary filter unit operates, so that the second adapter can output a normal direct current with a constant current value, and an output current value It is also possible to output a pulsating direct current that changes, so that it is compatible with the conventional charging mode.

  Optionally, in some embodiments, the second adapter 10 is operable in a second charging mode that may be a constant current mode. In the second charging mode, the output current of the second adapter is an alternating current that can reduce the lithium precipitation phenomenon of the lithium cell and improve the service life of the cell.

  Optionally, in some embodiments, the second adapter 10 is operable in a second charging mode that may be a constant current mode. In the second charging mode, the output voltage and output current of the second adapter are directly applied to both ends of the battery of the device to be charged (for example, a terminal), and direct-charge is performed on the battery.

  Specifically, the direct charge means that the output voltage and output current of the second adapter are directly applied (or directly introduced) to both ends of a battery to be charged (for example, a terminal) without being converted by a conversion circuit. It may refer to charging a battery of a charging device (eg, terminal). In this way, direct charging can prevent power loss due to the conversion process. In order to allow adjustment of the charging voltage or charging current in the charging circuit in the process of charging in the second charging mode, the second adapter may be designed as an intelligent adapter, and the charging voltage by such a second adapter. Alternatively, by converting the charging current, the burden on the charged device (for example, the terminal) can be reduced, and the amount of heat generated by the charged device can be reduced. The constant current mode in the present specification refers to a charging mode for controlling the output current of the second adapter, and should not be construed as requiring the output current of the second adapter to be kept constant (invariant) at all times. In practice, the second adapter is often charged with a multi-stage constant current in a constant current mode.

  Multi-stage constant current charging has N charging stages (N is an integer of 2 or more). The multi-stage constant current charging can start the first stage charging with a predetermined charging current. The N charging stages of the multi-stage constant current charging are sequentially executed from the first stage to the (N-1) stage, and after the transition from the previous charging stage to the next charging stage in the charging stage, the charging current value When the battery voltage reaches the threshold value of the end-of-charge voltage, the charging phase shifts from the previous charging phase to the next charging phase.

  Further, when the output current of the second adapter is a pulsating direct current, the constant current mode is a charging mode for controlling the peak value or the average value of the pulsating direct current, that is, as shown in FIG. It may refer to a charging mode that controls the peak value not to exceed the current corresponding to the constant current mode. In addition, when the output current of the second adapter is an alternating current, the constant current mode may indicate a charging mode for controlling the alternating current peak value.

  Hereinafter, embodiments of the present invention will be described in more detail with reference to specific examples. Note that the example of FIG. 23 is merely for those skilled in the art to understand the embodiments of the present invention, and is not intended to limit the embodiments of the present invention to specific numerical values or specific scenarios. It should be. It is obvious that various equivalent modifications or changes made by those skilled in the art based on the example described in FIG. 23 belong to the scope according to the embodiment of the present invention.

  The second adapter includes a power conversion unit (corresponding to the power conversion unit 11). As shown in FIG. 23, the power conversion unit may include an AC AC input end, a primary rectification unit 231, a transformer T <b> 1, a secondary rectification unit 232, and a secondary filter unit 233.

  Specifically, a rated current (mains current, generally AC at 220 V) is introduced to the input terminal of the AC AC, and then the rated current is transmitted to the primary rectification unit 231.

  The primary rectification unit 231 is configured to transmit the first pulsating direct current to the transformer T1 after converting the rated current to the first pulsating direct current. In the embodiment of the present invention, the primary rectification unit 231 is not particularly limited, and may be a bridge rectification unit such as a full-bridge rectification unit or a half-bridge rectification unit shown in FIG.

  A primary filter unit is provided on the primary side of the conventional adapter. The primary filter unit is typically filtered by a liquid aluminum electrolytic capacitor, but the volume of the liquid aluminum electrolytic capacitor is relatively large, resulting in an increase in the volume of the adapter. Since the primary filter unit is not provided on the primary side of the second adapter according to the embodiment of the present invention, the volume of the second adapter can be significantly reduced.

  The transformer T1 couples the first pulsating direct current from the primary side of the transformer to the secondary side, obtains the second pulsating direct current, and outputs the second pulsating direct current from the secondary winding of the transformer T1. It is configured. The transformer T1 may be a normal transformer or a high-frequency transformer with an operating frequency of 50 KHz to 2 MHz. The number of primary windings and the connection form of the transformer T1 vary depending on the type of the switching power supply used in the second adapter, but are not particularly limited in the embodiment of the present invention. As shown in FIG. 23, the second adapter can use a flyback switching power supply. The primary winding of the transformer has one end connected to the primary rectification unit 231 and the other end connected to a switch controlled by the PWM controller. Needless to say, the second adapter may be a forward switching power supply or a second adapter using a push-pull switching power supply. The primary rectification unit and the transformer in different types of switching power supplies have their respective connections, and detailed description is omitted here for the sake of brevity.

  The secondary rectification unit 232 is configured to rectify the second pulsating direct current output from the secondary winding of the transformer T1 to obtain a third pulsating direct current. Although the secondary rectification unit 232 has various forms, a typical secondary synchronous rectification circuit is shown in FIG. The synchronous rectification circuit includes a synchronous rectification (Synchronous Rectifier, SR) chip, a MOS (Metal Oxide Semiconductor, MOS) transistor controlled by the SR chip, and a diode connected to both ends of the source and drain of the MOS transistor. The SR chip realizes secondary synchronous rectification by transmitting a PWM control signal to the gate of the MOS transistor and controlling on / off of the MOS transistor.

  The secondary filter unit 233 rectifies the second pulsating direct current output from the secondary rectification unit 232, and outputs the output voltage and output current of the second adapter (that is, the voltage and current across VBUS and GND in FIG. 23). Configured to get. In the embodiment of FIG. 23, the capacitor in the secondary filter unit 233 can be filtered by a solid capacitor or a solid capacitor and a normal capacitor (eg, a ceramic capacitor) connected in parallel.

  Further, the secondary filter unit 233 may include a switch unit such as the switch transistor Q1 in FIG. The switch transistor Q1 receives a control signal transmitted from the MCU. When the MCU controls to turn on the switch transistor Q1, the secondary filter unit 233 starts operation and operates the second adapter in the first charging mode. In the first charging mode, the second adapter may be a direct current having an output voltage of 5V and a stable output current. When the MCU controls the switch transistor Q1 to turn off, the secondary filter unit 233 stops operating and causes the second adapter to operate in the second charging mode. In the second charging mode, the second adapter directly outputs the pulsating direct current obtained by rectifying the secondary rectifying unit 232.

  Further, the second adapter may include a voltage feedback unit (corresponding to the voltage feedback unit 12). As shown in FIG. 23, the voltage feedback unit may include a resistor R1, a resistor R2, and a first operational amplifier OPA1.

  Specifically, the resistor R1 and the resistor R2 sample the output voltage of the second adapter (that is, the voltage at VBUS), and transfer the obtained first voltage to the negative phase input terminal of the OPA1, thereby the second adapter. Indicates the magnitude of the output voltage. The common-mode input terminal of the first operational amplifier OPA1 is connected to the DAC1 port of the MCU via the DAC1. The MCU adjusts the voltage value of the reference voltage (corresponding to the first reference voltage) of the first operational amplifier OPA1 by controlling the magnitude of the analog amount output from the DAC1, and the voltage feedback unit also supports it. Adjust the voltage value of the target voltage.

  Further, the second adapter may include a current feedback unit (corresponding to the current feedback unit 13). As shown in FIG. 23, the current feedback unit may include a resistor R3, a galvanometer, a resistor R4, a resistor R5, and a second operational amplifier OPA2.

  Specifically, the resistor R3 is a current detection resistor. The galvanometer detects the current flowing through the resistor R3 to obtain the output current of the second adapter, converts the output current of the second adapter into a corresponding voltage value, and outputs it to both ends of the resistor R4 and the resistor R5. A second voltage is obtained by dividing the voltage. The second voltage is configured to indicate the magnitude of the output current of the second adapter. The negative phase input terminal of the second operational amplifier OPA2 is configured to receive the second voltage. The common-mode input terminal of the second operational amplifier OPA2 is connected to the DAC2 port of the MCU via the DAC2. The MCU adjusts the voltage value of the reference voltage (corresponding to the second reference voltage) of the second operational amplifier OPA2 by controlling the magnitude of the analog amount output from the DAC2, and the current feedback unit also supports Adjust the target current value.

  The second adapter further includes a power adjustment unit (corresponding to the power adjustment unit 14). As shown in FIG. 23, the power adjustment unit may include a first diode D1, a second diode D2, a photoelectric coupling unit 234, a PWM controller, and a switch transistor Q2.

  Specifically, the first diode D1 and the second diode D2 are two diodes connected in antiparallel, and the anodes of the first diode D1 and the second diode D2 are connected to the feedback point shown in FIG. Has been. The input terminal of the photoelectric coupling unit 234 is configured to receive a voltage signal at a feedback point. When the voltage at the feedback point is lower than the operating voltage VDD of the photoelectric coupling unit 234, the photoelectric coupling unit 234 starts to operate so as to supply the feedback voltage to the FB terminal of the PWM controller. The PWM controller controls the duty ratio of the PWM signal output from the PWM terminal by comparing the voltage at the CS terminal and the voltage at the FB terminal. When the voltage signal output from the first operational amplifier OPA1 (that is, the voltage feedback signal described above) is 0, or when the voltage signal output from the second operational amplifier OPA2 (that is, the current feedback signal described above) is 0. The voltage at the FB end is stable, and the duty ratio of the PWM control signal output from the PWM end of the PWM controller is kept constant. The PWM end of the PWM controller is connected to the primary winding of the transformer T1 via the switch transistor Q2, and is configured to control the output voltage and output current of the second adapter. When the duty ratio of the control signal transmitted from the PWM end is constant, the output voltage and output current of the second adapter are maintained stably.

  Furthermore, the second adapter of FIG. 23 further includes a first adjustment unit and a second adjustment unit. As shown in FIG. 23, the first adjustment unit includes an MCU (corresponding to the control unit) and the DAC 1, adjusts the voltage value of the reference voltage of the first operational amplifier OPA1, and further, a target voltage corresponding to the voltage feedback unit. The voltage value is adjusted. The second adjustment unit includes an MCU (corresponding to the control unit) and DAC2, and is configured to adjust the reference voltage of the second operational amplifier OPA2 and further adjust the current value of the target current corresponding to the current feedback unit. ing.

  The MCU can adjust the voltage value of the target voltage and the current value of the target current based on the currently used charging mode of the second adapter. For example, when charging in the constant voltage mode, the second adapter can adjust the target voltage to a voltage corresponding to the constant voltage mode and adjust the target current to the maximum output current allowed in the constant voltage mode. As another example, when charging in the constant current mode, the second adapter adjusts the target current to a current corresponding to the constant current mode, and adjusts the target voltage adjustment to the maximum output voltage allowed in the constant current mode. be able to.

  For example, in the constant voltage mode, the target voltage can be adjusted to a fixed voltage value (eg, 5V). A primary filter unit is provided on the primary side (the primary filter unit uses a large volume liquid aluminum electrolytic capacitor, so in the embodiment of the present invention, the primary filter unit is removed to reduce the volume of the second adapter). In consideration of the fact that the load capacity of the secondary filter unit 233 is limited, the target current can be set to 500 mA or 1 A. The second adapter first adjusts the output voltage to 5V based on the voltage feedback loop. When the output current of the second adapter reaches the target current, control is performed by the current feedback loop so that the output current of the second adapter does not exceed the target current. In the constant current mode, the target current can be set to 4A and the target voltage can be set to 5V. Since the output current of the second adapter is a pulsating direct current, the peak current of the pulsating direct current can be maintained at 4A by performing a peak clipping process on a current higher than 4A by the current feedback loop. When the output voltage of the second adapter exceeds the target voltage, control is performed by the voltage feedback loop so that the output voltage of the second adapter does not exceed the target voltage.

  Further, the MCU may include a communication interface. The MCU can perform bidirectional communication with a charged device (for example, a terminal) via the communication interface and control the charging process of the second adapter. Taking the case where the charging interface is a USB interface as an example, the communication interface may be the USB interface. Specifically, the second adapter charges a device to be charged (for example, a terminal) with a power line in the USB interface, and also charges a device to be charged (for example, a terminal) with a data line (D + and / or D−) in the USB interface. Can communicate with.

  In addition, the photoelectric coupling unit 234 is connected to the voltage adjustment unit, and can maintain the operating voltage of the optocoupler stably. As shown in FIG. 23, the voltage stabilization unit (voltage adjustment unit) in the embodiment of the present invention can be realized by a low dropout regulator (LDO).

  FIG. 23 illustrates an example in which the control unit (MCU) adjusts the reference voltage of the first operational amplifier OPA1 by the DAC1. Such a reference voltage adjustment method corresponds to the reference voltage adjustment method shown in FIG. 4, but the embodiment of the present invention is not limited to this. For example, any of the reference voltage adjustment methods shown in FIGS. The reference voltage adjustment method can be used, and detailed description is omitted here for the sake of brevity.

  FIG. 23 illustrates an example in which the control unit (MCU) adjusts the reference voltage of the second operational amplifier OPA2 by the DAC2. Such a method for adjusting the reference voltage corresponds to the method for adjusting the reference voltage shown in FIG. 12, but the embodiment of the present invention is not limited to this. For example, any of the methods shown in FIGS. The reference voltage adjustment method can be used, and detailed description is omitted here for the sake of brevity.

  The embodiment of the apparatus according to the present invention has been described in detail above with reference to FIGS. Hereinafter, a method embodiment according to an embodiment of the present invention will be described in detail with reference to FIG. In addition, since the description regarding a method respond | corresponds to the description regarding an apparatus, the overlapping description here is abbreviate | omitted appropriately for the sake of brevity.

  FIG. 24 is a flowchart of the charge control method according to the embodiment of the present invention. The charging method of FIG. 24 can be executed by the second adapter 10 described above. The charging method may include the following operations 2410 to 2440.

  In 2410, the input alternating current is converted to obtain the output voltage and output current of the second adapter.

  In 2420, by detecting the output voltage of the second adapter, a voltage feedback signal indicating whether or not the output voltage of the second adapter has reached a predetermined target voltage is generated.

  In 2430, the output current of the second adapter is detected to generate a current feedback signal indicating whether the output current of the second adapter has reached a predetermined target current.

  At 2440, if the voltage feedback signal indicates that the output voltage of the second adapter has reached the target voltage, or if the current feedback signal indicates that the output current of the second adapter has reached the target current, Stabilizes the output voltage and output current.

  Optionally, in some embodiments, the second adapter is operable in a first charging mode that is a constant voltage mode. In the constant voltage mode, the target voltage is a voltage corresponding to the constant voltage mode, and the target current is the maximum output current allowed in the constant voltage mode of the second adapter. The method of FIG. 24 may further include adjusting the output voltage of the second adapter to a voltage corresponding to the constant voltage mode based on the voltage feedback signal. At 2440, if the current feedback signal indicates that the output current of the second adapter has reached the maximum output current allowed in the constant voltage mode of the second adapter, the output current of the second adapter is in the constant voltage mode of the second adapter. And controlling so as not to exceed the maximum output current allowed by the.

  Optionally, in some embodiments, the second adapter includes a primary rectification unit, a transformer, a secondary rectification unit, and a secondary filter unit. The primary rectification unit directly outputs a voltage having a pulsating waveform to the transformer.

  Optionally, in some embodiments, the maximum output current allowed in the constant voltage mode of the second adapter is determined based on the capacitor capacitance in the secondary filter unit.

  Optionally, in some embodiments, the second adapter is operable in a second charging mode that is a constant current mode. In the constant current mode, the target voltage is the maximum output voltage allowed in the constant current mode of the second adapter, and the target current is a current corresponding to the constant current mode. The method of FIG. 24 further includes adjusting the output current of the second adapter to a current corresponding to the constant current mode based on the current feedback signal. At 2440, if the voltage feedback signal indicates that the output voltage of the second adapter has reached the maximum output voltage allowed in the constant current mode of the second adapter, the output voltage of the second adapter is in the constant current mode of the second adapter. Control so as not to exceed the maximum allowable output voltage.

  Optionally, in some embodiments, the method of FIG. 24 further includes adjusting the value of the target voltage.

  Optionally, in some embodiments, the second adapter is operable in a first charging mode and a second charging mode. Adjusting the value of the target voltage may include adjusting the value of the target voltage based on the first charging mode or the second charging mode currently used by the second adapter.

  Optionally, in some embodiments, generating the voltage feedback signal by detecting the output voltage of the second adapter is to sample the output voltage of the second adapter to obtain the first voltage; Comparing the first voltage with the first reference voltage and generating a voltage feedback signal based on a comparison result between the first voltage and the first reference voltage may be included. Adjusting the value of the target voltage includes adjusting the value of the target voltage by adjusting the value of the first reference voltage.

  Optionally, in some embodiments, the value of the first reference voltage is adjusted by a first DAC.

  Optionally, in some embodiments, the value of the first reference voltage is adjusted by an RC filter unit.

  Optionally, in some embodiments, the value of the first reference voltage is adjusted by a digital potentiometer.

  Optionally, in some embodiments, generating the voltage feedback signal by detecting the output voltage of the second adapter divides the output voltage of the second adapter based on a predetermined voltage division ratio, and Generating a first voltage; comparing the first voltage with a first reference voltage; and generating a voltage feedback signal based on a comparison result between the first voltage and the first reference voltage. Good. Adjusting the value of the target voltage includes adjusting the voltage value of the target voltage by adjusting the voltage dividing ratio.

  Optionally, in some embodiments, the voltage divider ratio is a digital potentiometer voltage divider ratio.

  Optionally, in some embodiments, the method of FIG. 24 may include adjusting the current value of the target current.

  Optionally, in some embodiments, the second adapter is operable in a first charging mode and a second charging mode. Adjusting the current value of the target current may include adjusting the current value of the target current based on the first charging mode or the second charging mode currently used by the second adapter.

  Optionally, in some embodiments, generating the current feedback signal by detecting the output current of the second adapter samples the output current of the second adapter to determine the output current of the second adapter. Obtaining a second voltage indicative of the magnitude; comparing the second voltage with a second reference voltage; generating a current feedback signal based on a comparison result between the second voltage and the second reference voltage; May be included. Adjusting the current value of the target current may include adjusting the current value of the target current by adjusting the voltage value of the second reference voltage.

  Optionally, in some embodiments, the value of the second reference voltage is adjusted by a second DAC.

  Optionally, in some embodiments, the value of the second reference voltage is adjusted by an RC filter unit.

  Optionally, in some embodiments, the value of the second reference voltage is adjusted by a digital potentiometer.

  Optionally, in some embodiments, generating the current feedback signal by detecting the output current of the second adapter samples the output current of the second adapter and outputs the output current of the second adapter. A current feedback signal is generated based on a result of comparing the second voltage with the second reference voltage, obtaining a third voltage indicating the magnitude of the second voltage, comparing the second voltage with the second reference voltage, and comparing the second voltage with the second reference voltage. May also be included. Adjusting the current value of the target current may include adjusting the current value of the target current by adjusting a voltage dividing ratio.

  Optionally, in some embodiments, the voltage divider ratio is a digital potentiometer voltage divider ratio.

  Optionally, in some embodiments, the second adapter is operable in a first charging mode and a second charging mode. The charging speed of the second adapter in the second charging mode is higher than the charging speed of the charged device in the first charging mode. The method of FIG. 24 controls the output of the second adapter in the second charging mode by performing two-way communication with the charged device in a process in which the second adapter is connected to the charged device. May further be included.

  Optionally, in some embodiments, controlling the output of the second adapter in the second charging mode by performing bidirectional communication with the charged device is bidirectional with the charged device. It may include negotiating a charging mode between the second adapter and the charged device by performing communication.

  Optionally, in some embodiments, the charged device can negotiate a charging mode between the second adapter and the charged device by performing bidirectional communication with the charged device. Transmitting a first instruction for inquiring whether or not to enable the second charging mode to the device to be charged; and the device to be charged transmitted from the device to be charged changes the second charging mode. When receiving the response instruction of the first instruction indicating whether or not to agree to enable the operation, and when the device to be charged agrees to enable the second charging mode, the second instruction Charging the device to be charged in a charging mode.

  Optionally, in some embodiments, controlling the output of the second adapter in the second charging mode by performing bi-directional communication with the charged device may be bi-directional communication with the charged device. To determine a charging voltage for charging the device to be charged output from the second adapter in the second charging mode, and the voltage value of the target voltage is the value in the second charging mode. Adjusting the voltage value of the target voltage so as to be equal to the charging voltage for charging the device to be charged output from the second adapter.

  Optionally, in some embodiments, by performing bi-directional communication with the charged device, a charging voltage for charging the charged device output from the second adapter in the second charging mode is provided. Determining includes transmitting to the charged device a second instruction for inquiring whether the output voltage of the second adapter matches the current voltage of the battery of the charged device; and the charged device Receiving a response instruction of the second instruction transmitted from the second adapter indicating whether the output voltage of the second adapter matches the current voltage of the battery or higher or lower than the current voltage of the battery; May be included.

  Optionally, in some embodiments, controlling the output of the second adapter in the second charging mode by performing bi-directional communication with the charged device may be bi-directional communication with the charged device. To determine a charging current for charging the device to be charged output from the second adapter in the second charging mode, and the current value of the target current is the value in the second charging mode. Adjusting the current value of the target current so as to be equal to the charging current for charging the charged device output from the second adapter.

  Optionally, in some embodiments, by performing bi-directional communication with the charged device, a charging current for charging the charged device output from the second adapter in the second charging mode is provided. Determining includes transmitting to the charged device a third instruction that inquires about the maximum charging current currently supported by the charged device, and the charged device currently transmitted from the charged device. Receiving a response instruction of the third instruction indicating the maximum charging current supported, and outputting from the second adapter in the second charging mode based on the maximum charging current currently supported by the device to be charged. Determining a charging current for charging the charged device It may be.

  Optionally, in some embodiments, controlling the output of the second adapter in the second charging mode by performing bi-directional communication with the device to be charged charges in the second charging mode. The process may include adjusting the output current of the second adapter by performing bidirectional communication with the charged device.

  Optionally, in some embodiments, adjusting the output current of the second adapter by performing bi-directional communication with the charged device may query a current voltage of the battery of the charged device. 4 instructions are transmitted to the device to be charged; a response instruction of the fourth instruction indicating the current voltage of the battery transmitted from the second adapter is received; and the current voltage of the battery Adjusting the output current of the second adapter based on the above.

  Optionally, in some embodiments, the second adapter includes a charging interface. The second adapter performs bidirectional communication with the device to be charged via a data line in the charging interface.

  Optionally, in some embodiments, the second adapter is operable in a second charging mode that is a constant current mode, and in the second charging mode, the output current of the second adapter is a pulsating direct current. is there.

  Optionally, in some embodiments, the second adapter is operable in a first charging mode that is a constant voltage mode. The second adapter includes a secondary filter unit. In the method of FIG. 24, in the first charging mode, the voltage value of the output voltage of the second adapter is maintained constant by controlling the secondary filter unit to operate. Then, it may further include that the output current of the second adapter becomes a pulsating direct current by controlling the operation of the secondary filter unit to stop.

  Optionally, in some embodiments, the second adapter is operable in a second charging mode that is a constant current mode, and in the second charging mode, the output current of the second adapter is an alternating current. .

  Optionally, in some embodiments, the second adapter is operable in a second charging mode, wherein in the second charging mode, the output voltage and output current of the second adapter are those of the device to be charged. The battery is directly applied to both ends of the battery, and the battery is directly charged.

  Optionally, in some embodiments, the second adapter is a second adapter configured to charge a mobile charged device.

  Optionally, in some embodiments, the second adapter includes a control unit that is an MCU configured to control the charging process.

  Optionally, in some embodiments, the second adapter includes a charging interface that is a USB interface.

  It is understood that the “first adapter” and the “second adapter” in the text are merely for convenience of explanation, and do not limit the specific type of adapter according to the embodiment of the present invention. Should be.

  As will be appreciated by those skilled in the art, the various units and algorithm steps described in connection with the embodiments disclosed herein may be implemented in electronic hardware or a combination of computer software and electronic hardware. Is possible. Whether these functions are implemented in hardware or software depends on the specific application of the technical means and the design constraints. One skilled in the art can implement the above functionality using different methods for each specific application, however, this implementation should not be considered beyond the scope of the present invention.

  As will be appreciated by those skilled in the art, for the convenience and brevity of the description, the detailed operational process of the system, apparatus, and unit may refer to the process corresponding to the method embodiment. Therefore, it will not be explained again.

  In some embodiments provided in this application, it should be appreciated that the disclosed systems, devices, and methods can be implemented in other manners. For example, the device embodiments described above are merely exemplary. For example, the unit division is simply a logical function division, and may be another division in an actual implementation. For example, multiple units or components can be combined or incorporated into another system, or some features are ignored or not performed. Furthermore, the mutual coupling or direct coupling or communication connection shown or described may be realized via some interface, and the indirect coupling or communication connection of the device or unit may be in electrical form, mechanical form, or Other forms may be used.

  A unit described as a separate member may or may not be physically separate. The member as the display unit may be a physical unit or may not be a physical unit, that is, may be in one position, or may be distributed over a plurality of network units. . Some or all of the units may be selected according to actual needs to achieve the objectives of the technical means according to the embodiment.

  In addition, each functional unit in each embodiment of the present invention may be incorporated into one processing unit, may physically exist alone, or two or more units may be incorporated into one unit. Good.

  When the above functions are realized by software function units and sold or used as an independent product, the software may be stored in a computer readable storage medium. Based on such an understanding, the gist of the technical means of the present invention, the part contributing to the prior art, or a part of the technical means may be realized by a software product. The computer software product is stored in a storage medium and includes a number of commands that cause a computer (such as a personal computer, server, or network device) to perform all or part of the method steps according to various embodiments of the invention. May be included. The storage medium can store program codes such as a USB memory, a removable hard disk, a read-only memory (ROM, read-only memory), a random access memory (RAM, random access memory), a magnetic disk, or an optical disk. Any medium may be included.

Although the embodiments of the present invention have been shown and described above, those skilled in the art can understand that the above-described embodiments are not limited to illustrative examples, and cannot be construed to limit the present invention. Various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and gist of the present invention.

Claims (53)

  1. An adapter,
    A power conversion unit configured to obtain the output voltage and output current of the adapter by converting the input alternating current; and
    An input end is connected to the power conversion unit and configured to generate a voltage feedback signal indicating whether or not the output voltage of the adapter has reached a predetermined target voltage by detecting the output voltage of the adapter. A voltage feedback unit,
    An input end is connected to the power conversion unit and configured to generate a current feedback signal indicating whether or not the output current of the adapter has reached a predetermined target current by detecting the output current of the adapter. Current feedback unit,
    An input terminal is connected to an output terminal of the voltage feedback unit and an output terminal of the current feedback unit, an output terminal is connected to the power conversion unit, receives the voltage feedback signal and the current feedback signal, and receives the voltage feedback signal. Indicates that the output voltage of the adapter has reached the target voltage, or if the current feedback signal indicates that the output current of the adapter has reached the target current, the output voltage and output current of the adapter are A power conditioning unit configured to stabilize;
    An adapter comprising: a charging interface, wherein the adapter performs bidirectional communication with the device to be charged via a data line of the charging interface.
  2.   The adapter of claim 1, further comprising a first adjustment unit connected to the voltage feedback unit and configured to adjust a value of the target voltage.
  3. The voltage feedback unit includes:
    A voltage dividing unit connected to the power conversion unit and configured to divide the output voltage of the adapter based on a predetermined voltage dividing ratio to generate a first voltage;
    An input terminal is connected to an output terminal of the voltage dividing unit, compares the first voltage with a first reference voltage, and compares the voltage feedback signal based on a comparison result between the first voltage and the first reference voltage. A voltage comparison unit configured to generate
    The adapter according to claim 2, wherein the first adjustment unit is connected to the voltage dividing unit and adjusts a value of the target voltage by adjusting a voltage dividing ratio of the voltage dividing unit.
  4. The voltage dividing unit includes a digital potentiometer,
    The first adjustment unit includes a control unit;
    The digital potentiometer has a high potential end connected to the power conversion unit, a low potential end grounded, and an output end connected to the input end of the voltage comparison unit,
    The adapter according to claim 3, wherein the control unit is connected to a control end of the digital potentiometer and configured to adjust a voltage dividing ratio of the digital potentiometer.
  5.   The voltage comparison unit includes a first operational amplifier, and the first operational amplifier has a negative-phase input terminal that receives the first voltage, an in-phase input terminal that receives the first reference voltage, and an output that generates the voltage feedback signal. The adapter according to claim 3, further comprising an end.
  6.   The adapter is operable in a first charging mode and a second charging mode, and the first adjustment unit is configured to use the target voltage based on a first charging mode or a second charging mode currently used by the adapter. The adapter according to any one of claims 2 to 5, characterized in that adjustment of the value of is performed.
  7.   The adapter according to any one of claims 1 to 6, further comprising a second adjustment unit connected to the current feedback unit and configured to adjust a current value of the target current. The listed adapter.
  8. The current feedback unit is
    A current sampling unit configured to have an input connected to the power conversion unit, sample the output current of the adapter, and obtain a third voltage indicating the magnitude of the output current of the adapter;
    A voltage dividing unit having an input end connected to the output end of the current sampling unit and configured to divide a third voltage based on a predetermined voltage dividing ratio to generate a second voltage;
    An input terminal is connected to an output terminal of the voltage dividing unit, compares the second voltage with a second reference voltage, and compares the current feedback signal based on a comparison result between the second voltage and the second reference voltage. A current comparison unit configured to generate
    The adapter according to claim 7, wherein the second adjustment unit is connected to the voltage dividing unit and adjusts a current value of the target current by adjusting a voltage dividing ratio of the voltage dividing unit.
  9. The voltage dividing unit includes a digital potentiometer,
    The second adjustment unit includes a control unit;
    The digital potentiometer has a high potential end connected to the output end of the current sampling unit, a low potential end grounded, and an output end connected to the input end of the voltage comparison unit,
    The adapter according to claim 8, wherein the control unit is connected to a control end of the digital potentiometer and is configured to adjust a voltage dividing ratio of the digital potentiometer.
  10.   The current comparison unit includes a second operational amplifier. The second operational amplifier has a negative-phase input terminal that receives the second voltage, an in-phase input terminal that receives the second reference voltage, and an output that generates the current feedback signal. The adapter according to claim 8, further comprising an end.
  11.   The adapter is operable in a first charging mode and a second charging mode, and the second adjustment unit is configured to generate the target current based on the first charging mode or the second charging mode currently used by the adapter. The adapter according to claim 8, wherein the adjustment of the current value is performed.
  12. The adapter is operable in a first charging mode that is a constant voltage mode. In the constant voltage mode, the target voltage is a voltage corresponding to the constant voltage mode, and the target current is the constant voltage of the adapter. The maximum output current allowed in the mode,
    The power adjustment unit adjusts the output voltage of the adapter to a voltage corresponding to the constant voltage mode based on the voltage feedback signal, and the current feedback signal indicates that the output current of the adapter is equal to the constant voltage mode of the adapter. The adapter is configured to control so that the output current of the adapter does not exceed the maximum output current allowed in the constant voltage mode of the adapter. The adapter according to claim 1, wherein the adapter is a feature.
  13.   The power conversion unit includes a primary rectification unit, a transformer, a secondary rectification unit, and a secondary filter unit, and the primary rectification unit directly outputs a voltage having a pulsating waveform to the transformer. The adapter according to claim 12.
  14.   14. The adapter according to claim 13, wherein the maximum output current allowed in the constant voltage mode of the adapter is determined based on a capacitor capacity in the secondary filter unit.
  15. The adapter is operable in a second charging mode which is a constant current mode, wherein the target voltage is a maximum output voltage allowed in the constant current mode of the adapter, and the target current is A current corresponding to the constant current mode,
    The power adjustment unit adjusts the output current of the adapter to a current corresponding to the constant current mode based on the current feedback signal, and the voltage feedback signal indicates that the output voltage of the adapter is equal to the constant current mode of the adapter. The adapter is configured to control so that the output voltage of the adapter does not exceed the maximum output voltage allowed in the constant current mode of the adapter. 15. Adapter according to any one of the preceding claims, characterized in that it is characteristic.
  16. The voltage feedback unit includes a first operational amplifier configured such that an output terminal outputs the voltage feedback signal, and the current feedback unit includes a second operational amplifier configured such that the output terminal outputs the current feedback signal. With an operational amplifier
    The power adjustment unit includes a first diode, a second diode, a photoelectric coupling unit, and a pulse width modulation control unit, and an output terminal of the first operational amplifier of the voltage feedback unit is connected to a cathode of the first diode. The anode of the first diode is connected to the input terminal of the photoelectric coupling unit, the output terminal of the second operational amplifier of the current feedback unit is connected to the cathode of the second diode, and the anode of the second diode is Connected to the input end of the photoelectric coupling unit, the output end of the photoelectric coupling unit is connected to the input end of the pulse width modulation control unit, and the output end of the pulse width modulation control unit is connected to the power conversion unit The adapter according to any one of claims 1 to 15, wherein the adapter is characterized by that.
  17.   The adapter is operable in a first charging mode and a second charging mode, and a charging speed for the charged device in the second charging mode is faster than a charging speed for the charged device in the first charging mode, and the adapter Includes a control unit, and the control unit controls the output of the adapter in the second charging mode by performing two-way communication with the charged device in a process in which the adapter is connected to the charged device. The adapter according to any one of claims 1 to 16, characterized in that:
  18. The control unit controls the output of the adapter in the second charging mode by performing bidirectional communication with the charged device.
    The adapter according to claim 17, wherein the control unit includes negotiating a charging mode between the adapter and the charged device by performing bidirectional communication with the charged device. .
  19. The control unit negotiates a charging mode between the adapter and the charged device by performing bidirectional communication with the charged device,
    The control unit transmits, to the charged device, a first instruction for inquiring whether or not the charged device enables the second charging mode;
    The control unit receives a response instruction of the first instruction transmitted from the charged device and indicating whether or not the charged device agrees to enable the second charging mode; ,
    When the device to be charged agrees to enable the second charging mode, the control unit includes charging the device to be charged in the second charging mode. The adapter according to claim 18.
  20. The control unit controls the output of the adapter in the second charging mode by performing bidirectional communication with the charged device.
    The control unit determines a charging voltage for charging the charged device output from the adapter in the second charging mode by performing bidirectional communication with the charged device;
    The control unit adjusts the voltage value of the target voltage so that the voltage value of the target voltage becomes equal to a charging voltage for charging the charged device output from the adapter in the second charging mode. The adapter according to any one of claims 17 to 19, characterized by comprising:
  21. The control unit determines a charging voltage for charging the charged device output from the adapter in the second charging mode by performing bidirectional communication with the charged device.
    The control unit transmits to the charged device a second instruction for inquiring whether an output voltage of the adapter matches a current voltage of a battery of the charged device;
    The second unit instruction transmitted from the charged device to indicate whether the output voltage of the adapter matches the current voltage of the battery or is higher or lower than the current voltage of the battery; 21. The adapter according to claim 20, comprising receiving a reply instruction.
  22. The control unit controls the output of the adapter in the second charging mode by performing bidirectional communication with the charged device.
    The control unit determines a charging current for charging the charged device output from the adapter in the second charging mode by performing bidirectional communication with the charged device;
    The control unit adjusts the current value of the target current so that the current value of the target current is equal to a charging current for charging the charged device output from the adapter in the second charging mode. The adapter according to any one of claims 17 to 21, characterized by comprising:
  23. The control unit determines a charging current for charging the charged device output from the adapter in the second charging mode by performing bidirectional communication with the charged device.
    The control unit sends a third instruction to the charged device for querying a maximum charging current currently supported by the charged device;
    The control unit receives a response instruction of the third instruction transmitted from the charged device and indicating the maximum charging current currently supported by the charged device;
    The control unit determines a charging current for charging the charged device output from the adapter in the second charging mode based on a maximum charging current currently supported by the charged device; The adapter according to claim 22, comprising:
  24. The control unit controls the output of the adapter in the second charging mode by performing bidirectional communication with the charged device.
    The charging process in the second charging mode includes adjusting the output current of the adapter by the control unit performing bi-directional communication with the device to be charged. 24. The adapter according to any one of 23.
  25. The control unit adjusts the output current of the adapter by performing bidirectional communication with the charged device.
    The control unit transmits a fourth instruction for inquiring a current voltage of a battery of the charged device to the charged device;
    The control unit receives a response instruction of the fourth instruction transmitted from the adapter and indicating a current voltage of the battery;
    25. The adapter of claim 24, wherein the control unit includes adjusting an output current of the adapter based on a current voltage of the battery.
  26.   26. The adapter according to any one of claims 1 to 25, wherein the adapter is an adapter configured to charge a mobile charged device.
  27.   27. The adapter according to any one of claims 1 to 26, characterized in that the adapter comprises a control unit, which is a micro control unit, configured to control the charging process.
  28.   28. The adapter according to any one of claims 1 to 27, wherein the adapter includes a charging interface that is a universal serial bus USB interface.
  29. A charge control method used for the adapter,
    Obtaining the output voltage and output current of the adapter by converting the input alternating current;
    Generating a voltage feedback signal indicating whether the output voltage of the adapter has reached a predetermined target voltage by detecting the output voltage of the adapter;
    Generating a current feedback signal indicating whether the output current of the adapter has reached a predetermined target current by detecting the output current of the adapter;
    If the voltage feedback signal indicates that the output voltage of the adapter has reached the target voltage, or if the current feedback signal indicates that the output current of the adapter has reached the target current, the output voltage of the adapter And stabilizing the output current;
    Performing bidirectional communication with the charged device via a data line of the charging interface;
    The charge control method characterized by including.
  30.   30. The charging control method according to claim 29, further comprising adjusting a value of the target voltage.
  31. Generating a voltage feedback signal by detecting the output voltage of the adapter
    Dividing the output voltage of the adapter based on a predetermined voltage division ratio to generate a first voltage;
    Comparing the first voltage with a first reference voltage;
    Generating the voltage feedback signal based on a comparison result between the first voltage and the first reference voltage;
    Adjusting the value of the target voltage
    The charge control method according to claim 30, further comprising adjusting a value of the target voltage by adjusting the voltage dividing ratio.
  32.   32. The charging control method according to claim 31, wherein the voltage dividing ratio is a voltage dividing ratio of a digital potentiometer.
  33. The adapter is operable in a first charging mode and a second charging mode,
    Adjusting the value of the target voltage
    33. The method according to any one of claims 30 to 32, comprising adjusting the value of the target voltage based on a first charging mode or a second charging mode currently used by the adapter. Charge control method.
  34.   The charge control method according to any one of claims 29 to 33, further comprising adjusting a current value of the target current.
  35. Generating a current feedback signal by detecting the output current of the adapter
    Sampling the output current of the adapter to obtain a third voltage indicative of the magnitude of the output current of the adapter;
    Dividing the third voltage based on a predetermined voltage division ratio to generate a second voltage;
    Comparing the second voltage with a second reference voltage;
    Generating the current feedback signal based on a comparison result between the second voltage and the second reference voltage;
    To adjust the current value of the target current,
    The charge control method according to claim 34, further comprising adjusting a current value of the target current by adjusting the voltage dividing ratio.
  36.   36. The charging control method according to claim 35, wherein the voltage dividing ratio is a voltage dividing ratio of a digital potentiometer.
  37. The adapter is operable in a first charging mode and a second charging mode,
    To adjust the current value of the target current,
    37. The method according to claim 34, further comprising adjusting a current value of the target current based on a first charging mode or a second charging mode currently used by the adapter. The charge control method as described.
  38. The adapter is operable in a first charging mode that is a constant voltage mode. In the constant voltage mode, the target voltage is a voltage corresponding to the constant voltage mode, and the target current is the constant voltage of the adapter. The maximum output current allowed in the mode,
    The charge control method includes:
    Adjusting the output voltage of the adapter to a voltage corresponding to the constant voltage mode based on the voltage feedback signal;
    If the voltage feedback signal indicates that the output voltage of the adapter has reached the target voltage, or if the current feedback signal indicates that the output current of the adapter has reached the target current, the output voltage of the adapter And stabilizing the output current is
    When the current feedback indicates that the output current of the adapter has reached the maximum output current allowed in the constant voltage mode of the adapter, the output current of the adapter is the maximum allowed in the constant voltage mode of the adapter. The charge control method according to any one of claims 29 to 37, further comprising controlling so as not to exceed an output current.
  39.   The adapter includes a primary rectification unit, a transformer, a secondary rectification unit, and a secondary filter unit, and the primary rectification unit directly outputs a voltage having a pulsation waveform to the transformer. The charge control method according to claim 38.
  40.   40. The charging control method according to claim 39, wherein a maximum output current allowed in the constant voltage mode of the adapter is determined based on a capacitor capacity in the secondary filter unit.
  41. The adapter is operable in a second charging mode which is a constant current mode, wherein the target voltage is a maximum output voltage allowed in the constant current mode of the adapter, and the target current is A current corresponding to the constant current mode,
    The charge control method includes:
    Adjusting the output current of the adapter to a current corresponding to the constant current mode based on the current feedback signal;
    If the voltage feedback signal indicates that the output voltage of the adapter has reached the target voltage, or if the current feedback signal indicates that the output current of the adapter has reached the target current, the output voltage of the adapter And stabilizing the output current is
    If the voltage feedback signal indicates that the output voltage of the adapter has reached the maximum output voltage allowed in the constant current mode of the adapter, the output voltage of the adapter is allowed in the constant current mode of the adapter. The charge control method according to any one of claims 29 to 40, further comprising controlling so as not to exceed a maximum output voltage.
  42. The adapter is operable in a first charging mode and a second charging mode, and a charging rate for the charged device in the second charging mode is faster than a charging rate for the charged device in the first charging mode,
    The charge control method includes:
    The method further comprises controlling the output of the adapter in the second charging mode by performing bidirectional communication with the charged device in a process in which the adapter is connected to the charged device. The charge control method according to any one of 29 to 41.
  43. Controlling the output of the adapter in the second charging mode by performing bidirectional communication with the device to be charged,
    43. The charging control method according to claim 42, further comprising negotiating a charging mode between the adapter and the charged device by performing bidirectional communication with the charged device.
  44. Negotiating the charging mode between the adapter and the charged device by performing bidirectional communication with the charged device,
    Transmitting to the charged device a first instruction for inquiring whether or not the charged device enables the second charging mode;
    Receiving a response instruction of the first instruction transmitted from the charged device and indicating whether the charged device agrees to enable the second charging mode;
    44. Charging the device to be charged in the second charging mode if the device to be charged agrees to enable the second charging mode. 44. Charge control method.
  45. Controlling the output of the adapter in the second charging mode by performing bidirectional communication with the device to be charged,
    Determining a charging voltage for charging the charged device output from the adapter in the second charging mode by performing bidirectional communication with the charged device;
    Adjusting the voltage value of the target voltage so that the voltage value of the target voltage becomes equal to a charging voltage for charging the charged device output from the adapter in the second charging mode. The charge control method according to any one of claims 42 to 44, wherein:
  46. Determining a charging voltage for charging the charged device output from the adapter in the second charging mode by performing bidirectional communication with the charged device;
    Sending a second instruction to inquire whether the output voltage of the adapter matches the current voltage of the battery of the device to be charged;
    Receiving a response instruction of the second instruction transmitted from the charged device indicating whether the output voltage of the adapter matches the current voltage of the battery or higher or lower than the current voltage of the battery; The charge control method according to claim 45, further comprising:
  47. Controlling the output of the adapter in the second charging mode by performing bidirectional communication with the device to be charged,
    Determining a charging current for charging the charged device output from the adapter in the second charging mode by performing bidirectional communication with the charged device;
    Adjusting the current value of the target current so that the current value of the target current is equal to a charging current for charging the charged device output from the adapter in the second charging mode. The charge control method according to any one of claims 42 to 46, wherein:
  48. Determining a charging current for charging the charged device output from the adapter in the second charging mode by performing bidirectional communication with the charged device;
    Sending a third instruction to query the charged device for a maximum charging current currently supported by the charged device;
    Receiving a response instruction of the third instruction transmitted from the charged device and indicating a maximum charging current currently supported by the charged device;
    Determining a charging current for charging the charged device output from the adapter in the second charging mode based on a maximum charging current currently supported by the charged device. The charge control method according to claim 47.
  49. Controlling the output of the adapter in the second charging mode by performing bidirectional communication with the device to be charged,
    The process of charging in the second charging mode includes adjusting the output current of the adapter by performing bidirectional communication with the device to be charged. The charge control method according to item.
  50. Adjusting the output current of the adapter by performing bidirectional communication with the charged device
    Transmitting a fourth instruction to inquire about the current voltage of the battery of the charged device to the charged device;
    Receiving a response instruction of the fourth instruction sent from the adapter indicating the current voltage of the battery;
    The charge control method according to claim 49, further comprising adjusting an output current of the adapter based on a current voltage of the battery.
  51.   51. The charging control method according to any one of claims 29 to 50, wherein the adapter is an adapter configured to charge a mobile charged device.
  52.   52. The charging control method according to any one of claims 29 to 51, wherein the adapter includes a control unit that is a micro control unit configured to control a charging process.
  53. 53. The charging control method according to any one of claims 29 to 52, wherein the adapter includes a charging interface that is a universal serial bus USB interface.

JP2017564618A 2016-02-05 2017-01-07 Adapter and charge control method Pending JP2018532358A (en)

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