WO2015014224A1 - 一种供电终端、充电控制方法及装置 - Google Patents

一种供电终端、充电控制方法及装置 Download PDF

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Publication number
WO2015014224A1
WO2015014224A1 PCT/CN2014/082697 CN2014082697W WO2015014224A1 WO 2015014224 A1 WO2015014224 A1 WO 2015014224A1 CN 2014082697 W CN2014082697 W CN 2014082697W WO 2015014224 A1 WO2015014224 A1 WO 2015014224A1
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WO
WIPO (PCT)
Prior art keywords
power module
switch
output voltage
terminal
power supply
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Application number
PCT/CN2014/082697
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English (en)
French (fr)
Inventor
李长琦
贺彦国
郑立翔
赵彦丰
Original Assignee
华为终端有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为终端有限公司 filed Critical 华为终端有限公司
Priority to EP14832921.2A priority Critical patent/EP3001532A4/en
Priority to US14/909,001 priority patent/US10554060B2/en
Priority to JP2016530327A priority patent/JP6198258B2/ja
Publication of WO2015014224A1 publication Critical patent/WO2015014224A1/zh

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Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26Power supply means, e.g. regulation thereof
    • G06F1/266Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Definitions

  • the present invention relates to the field of terminal charging technologies, and in particular, to a power supply terminal, a charging control method, and a device.
  • USB Universal Serial Bus
  • the power supply terminal shorts the two data pins D+ and D- of the USB port, and the analog standard charger charges the power supply terminal.
  • the charging capability of the power supply terminal can meet the demand of the powered terminal, that is, the maximum charging current that the power supply terminal can output is not less than the charging current required by the power supply terminal
  • the power supply terminal can charge the powered terminal; however, when the power is supplied
  • the charging capability of the terminal cannot meet the demand of the powered terminal, that is, the maximum charging current that the power supply terminal can output is less than the charging current required by the power supply terminal, the voltage of the USB port of the power supply terminal may drop, and eventually the charging fails.
  • the embodiment of the invention provides a power supply terminal, a charging control method and a device, which are used to solve the problem of poor compatibility of the terminal charging scheme in the prior art.
  • a power supply terminal including a USB port, a switch, a power module, and a processor. among them:
  • the USB port is configured to connect to a powered terminal
  • One end of the power module is connected to the power pin VBUS of the USB port, and is used to charge the power supply terminal through the power pin VBUS, and the other end of the power module is connected to one terminal of the processor;
  • the other two terminals of the processor are respectively connected to two data pins D+ and D- of the USB port;
  • the switch and the two data pins D+, D- are connected in parallel to the processor;
  • the processor In the closed state of the switch, during the charging process of the power module, the processor detects that the falling amplitude of the output voltage of the power module exceeds a preset value, and controls the switch. Disconnecting; and controlling the power module output voltage to charge the powered terminal when the switch is off.
  • the processor is specifically configured to: after detecting that a falling amplitude of an output voltage of the power module exceeds a preset value, before controlling the switch to be disconnected , controlling the power module to stop the voltage output.
  • the processor is further configured to: charge, by the power module, an output voltage to charge the powered terminal In the process, if it is detected that the powered terminal is pulled out from the USB port, the power module is controlled to stop voltage output.
  • the processor is specifically used in In the disconnected state, the power module output voltage is controlled to charge the powered terminal based on the OTG protocol.
  • the processor is further configured to: when the switch is in a closed state, the power module outputs a voltage During the charging process of the powered terminal, if it is not detected that the falling amplitude of the output voltage of the power module exceeds a preset value, the output voltage of the power module is controlled to be charged to the end of the powered terminal.
  • a charging control method including:
  • the power module output voltage is controlled to charge the powered terminal.
  • the method includes the steps of: controlling the power source The module stops the voltage output.
  • the method further includes:
  • the output voltage of the power module is charged by the powered terminal, and specifically includes:
  • the power module output voltage is controlled to charge the powered terminal based on an OTG protocol.
  • the first possible implementation manner of the second aspect, the second possible implementation manner of the second aspect, or the third possible implementation manner of the second aspect, in the fourth possible implementation manner In the closed state of the switch, when the output voltage of the power module is in the charging process of the powered terminal, if the falling amplitude of the output voltage of the power module is not detected to exceed a preset value, the control is performed. The power module output voltage is charged to the end of the powered terminal.
  • a charging control apparatus including: The detecting unit detects the falling amplitude of the output voltage of the power module during the charging process of the power supply terminal when the switch connected in parallel with the two data pins D+ and D- of the USB port is in a closed state. Exceeding the preset value;
  • a control unit that controls the switch to be turned off, and in the off state of the switch, controls the power module output voltage to charge the powered terminal.
  • control unit is specifically configured to: after detecting that a falling amplitude of an output voltage of the power module exceeds a preset value, before controlling the switch to be disconnected , controlling the power module to stop the voltage output.
  • control unit is further configured to: when the output voltage of the power module is configured to charge the powered terminal In the process, if it is detected that the powered terminal is pulled out from the USB port, the power module is controlled to stop voltage output.
  • the control unit is specifically used in In the disconnected state, the power module output voltage is controlled to charge the powered terminal based on the OTG protocol.
  • control unit is further configured to: when the output voltage of the power module is in the charging process of the powered terminal, if the output of the power module is not detected, if the output voltage of the power module is not detected, the amplitude of the drop exceeds At the preset value, the power module output voltage is controlled to charge the powered terminal to the end.
  • a switch and a data port D+, D- are connected in parallel in the power supply terminal,
  • the switch is controlled to be closed when the powered terminal is inserted into the power supply terminal through the USB port, and the power supply terminal simulates a standard charger to charge the powered terminal, and when the power supply terminal simulates a standard charger
  • the switch is controlled to be disconnected, and the power supply terminal and the powered terminal can communicate.
  • the power supply terminal can charge the powered terminal, thereby improving compatibility.
  • FIG. 1 is a schematic structural diagram of a power supply terminal according to an embodiment of the present invention.
  • FIG. 2 is a flowchart of a charging control method according to an embodiment of the present invention.
  • FIG. 3 is a detailed flowchart of a charging control method according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a charging control apparatus according to an embodiment of the present invention. detailed description
  • the embodiment of the present invention provides a power supply terminal, a charging control method and a device.
  • the following describes the preferred embodiments of the present invention with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein. It is intended to illustrate and explain the present invention and is not intended to limit the invention. And in the case of no conflict, the features in the embodiments and the embodiments of the present application can be combined with each other.
  • An embodiment of the present invention provides a power supply terminal, as shown in FIG. 1, including a USB port 101, a switch 102, a power module 103, and a processor 104, where:
  • USB port 101 for connecting to a powered terminal
  • the power module 103 is connected to the power pin VBUS of the USB port 101 for charging the powered terminal through the power pin VBUS, and the other end of the power module 103 is connected to the processor 104-terminal;
  • the other two terminals of the processor 104 are respectively connected to the two data pins D+, D- of the USB port 101;
  • the switch 102 and the two data pins D+, D- are connected in parallel to the processor 104;
  • the processor 104 detects that the falling amplitude of the output voltage of the power module 103 exceeds a preset value, and the control switch 102 is turned off;
  • the off state of 102 the output voltage of the control power module 103 is charged for the powered terminal.
  • the power module 103 may specifically include a battery and a voltage regulating circuit.
  • the processor 104 is specifically configured to: after detecting that the falling amplitude of the output voltage of the power module 103 exceeds a preset value, before the control switch 102 is turned off, the control power module 103 stops the voltage output.
  • the processor 104 is further configured to: when the output voltage of the power module 103 is being charged for charging the powered terminal, if the powered terminal is detected to be pulled out from the USB port 101, the control power module 103 stops the voltage output.
  • the processor 104 is specifically configured to control the output voltage of the power module 103 to charge the powered terminal based on the OTG (On The Go) protocol when the switch 102 is turned off.
  • the embodiment of the present invention further provides a charging control method. As shown in FIG. 2, the method includes the following steps: Step 201: The power module is in a closed state when the switch connected to the two data pins D+ and D- of the USB port is in a closed state. When the output voltage is being charged by the power supply terminal, the falling amplitude of the output voltage of the power module is detected to exceed a preset value, and the switch is controlled to be turned off;
  • Step 202 Control the output voltage of the power module to charge the powered terminal when the switch is off.
  • the method includes the steps of: controlling the power module to stop the voltage output.
  • the charging control method may further include:
  • the power module When the output voltage of the power module is charging the powered terminal, if it is detected that the powered terminal is pulled out from the USB port, the power module is controlled to stop the voltage output.
  • step 203 may specifically be:
  • the output voltage of the power module is controlled according to the OTG protocol to be powered Terminal charging.
  • Step 301 When the power supply terminal detects that the powered terminal is accessed through the USB port, the switch that controls the two data pins D+ and D- in the USB port is closed.
  • the power supply terminal can detect whether the powered terminal is plugged in by detecting the level of the ID pin of the USB port. If the level of the ID pin of the USB port is pulled low, the powered terminal is inserted. This part is prior art and will not be described in detail here.
  • Step 302 The power supply terminal controls a power module output voltage connected to the power port VBUS of the USB port to charge the powered terminal.
  • the power supply terminal simulates a standard charger to charge the powered terminal.
  • the standard voltage of the USB port is 5V, and it is possible to output a charging current of up to 1A to charge the power supply terminal. That is, the power module outputs 5V voltage and can output a charging current of up to 1A.
  • Step 303 The power supply terminal detects the output voltage of the power module, and determines whether there is a drop amplitude of the output voltage of the power module exceeding a preset value.
  • the power supply terminal detects that the falling amplitude of the output voltage of the power module exceeds a preset value, that is, the falling amplitude of the voltage of the USB port exceeds a preset value, indicating that the power supply terminal simulates the standard charger to charge the powered terminal, charging The capability cannot meet the requirements of the powered terminal, and the process proceeds to step 304; otherwise, the power supply terminal simulates the standard charger to charge the powered terminal, and the charging capability can meet the requirement of the powered terminal. At this time, the power supply terminal can The analog standard charger always charges the powered terminal until the charging is completed, and the process ends.
  • the preset value can be specifically set according to the actual situation.
  • Step 304 The power supply terminal controls the power module to stop the voltage output. At this time, the USB port stops voltage output.
  • Step 305 The power terminal controls the two data pins D+ and D- in parallel with the USB port to be disconnected.
  • the power supply terminal can communicate with the power supply terminal through the two data pins D+ and D- of the USB port, which can be based on the OTG protocol, the power supply terminal is used as the OTG master device, and the power supply terminal is used as the OTG slave device.
  • step 305 may be performed first, and then step 304 is performed, that is, the two data pins D+ and D- of the USB port are first controlled.
  • the parallel switch is turned off, and then the power module stops controlling the voltage output.
  • Step 306 The power supply terminal controls the power module to continue to output the voltage to be charged by the power supply terminal.
  • the USB port has a voltage output.
  • the charging current required by the OTG slave device is 500 mA.
  • the charging capability of the power supply terminal can meet the demand of the powered terminal, and the power supply terminal can always charge the powered terminal until the charging is completed.
  • the control power module stops the voltage output, so that the USB port stops the voltage output.
  • the method provided by the embodiment of the invention has better compatibility, and the power supply terminal preferentially simulates the standard charger to charge the powered terminal, so as to obtain a larger charging current for the powered terminal, and simulates the standard charger when the power supply terminal
  • the power supply terminal is charged based on the USB communication protocol, so that the terminal charging time can be shortened as much as possible, the charging efficiency is improved, and the user experience is improved.
  • the charging control method according to the above embodiment of the present invention, correspondingly, the embodiment of the present invention further provides a charging control device, and a schematic structural diagram thereof is shown in FIG. 4, which specifically includes: a detecting unit 401, The two data pins D+ and D- in parallel of the USB port are in a closed state, and the output voltage of the power module is charged during the charging process of the power supply terminal, and the falling amplitude of the output voltage of the power module is detected to exceed a preset value;
  • the control unit 402 controls the switch to be turned off, and controls the power module output voltage to charge the powered terminal when the switch is turned off.
  • control unit 402 is specifically configured to control the power module to stop the voltage output before detecting that the switch has been turned off after detecting that the falling amplitude of the output voltage of the power module exceeds a preset value.
  • control unit 402 is further configured to control the power module to stop the voltage output when detecting that the powered terminal is pulled out from the USB port during the charging of the power module.
  • control unit 402 is specifically configured to control, according to the OTG protocol, the output voltage of the power module to charge the powered terminal when the switch is in an off state.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Power Sources (AREA)

Abstract

一种供电终端、充电控制方法及装置,能够解决现有技术中的终端充电方案兼容性较差的问题。该供电终端包括USB端口、开关、电源模块和处理器, USB端口,用于连接被供电终端;电源模块一端连接于USB端口的电源管脚 VBUS,用于通过电源管脚VBUS为被供电终端充电,电源模块另一端连接于处理器一个端子;处理器的另两端子,分别与USB端口的两个数据管脚D+、D- 连接;开关与两个数据管脚D+、D-并联于处理器;在开关闭合状态下,电源模块输出电压为被供电终端充电过程中,处理器检测到电源模块的输出电压的跌落幅值超过预设值,控制开关断开;并在开关断开状态下,控制电源模块输出电压为被供电终端充电。

Description

一种供电终端、 充电控制方法及装置
本申请要求于 2013 年 07 月 31 日提交中国专利局, 申请号为 CN 201310330408.0、 发明名称为 "一种供电终端、 充电控制方法及装置" 的中国专 利申请, 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及终端充电技术领域, 尤其涉及一种供电终端、 充电控制方法及 装置。
背景技术
目前, 很多配置有大容量蓄电池的终端都可以作为供电终端给其它终端充 电。 当供电终端和被供电终端通过 USB ( Universal Serial Bus , 通用串行总线) 端口相连时, 可釆用如下的充电方案为被供电终端进行充电:
供电终端将 USB端口的两个数据管脚 D+、 D-短接, 模拟标准充电器为被 供电终端充电。 当供电终端的充电能力能够满足被供电终端的需求时, 即供电 终端能够输出的最大充电电流不小于被供电终端需求的充电电流时, 此时供电 终端能够为被供电终端充电; 然而, 当供电终端的充电能力不能够满足被供电 终端的需求时, 即供电终端能够输出的最大充电电流小于被供电终端需求的充 电电流时, 将会导致供电终端的 USB端口电压跌落, 最终导致充电失败。
可见, 上述方案的兼容性较差, 很多情况下, 供电终端不能釆用上述方案 为被供电终端充电。 发明内容
本发明实施例提供一种供电终端、 充电控制方法及装置, 用以解决现有技 术中的终端充电方案兼容性较差的问题。
第一方面, 提供一种供电终端, 包括 USB端口、 开关、 电源模块和处理器, 其中:
所述 USB端口, 用于连接被供电终端;
所述电源模块一端连接于所述 USB端口的电源管脚 VBUS, 用于通过所述 电源管脚 VBUS为被供电终端充电, 所述电源模块另一端连接于所述处理器一 个端子;
所述处理器的另两端子, 分别与所述 USB端口的两个数据管脚 D+、 D-连 接;
所述开关与所述两个数据管脚 D+、 D-并联于所述处理器;
在所述开关闭合状态下, 所述电源模块输出电压为所述被供电终端充电过 程中, 所述处理器检测到所述电源模块的输出电压的跌落幅值超过预设值, 控 制所述开关断开; 并在所述开关断开状态下, 控制所述电源模块输出电压为所 述被供电终端充电。
结合第一方面, 在第一种可能的实现方式中, 所述处理器, 具体用于在检 测到所述电源模块的输出电压的跌落幅值超过预设值之后, 控制所述开关断开 之前, 控制所述电源模块停止电压输出。
结合第一方面, 或者第一方面的第一种可能的实现方式, 在第二种可能的 实现方式中, 所述处理器, 还用于在所述电源模块输出电压为所述被供电终端 充电过程中, 若检测到所述被供电终端从所述 USB端口拔出时, 控制所述电源 模块停止电压输出。
结合第一方面, 第一方面的第一种可能的实现方式, 或者第一方面的第二 种可能的实现方式, 在第三种可能的实现方式中, 所述处理器, 具体用于在所 述开关断开状态下, 基于 OTG协议控制所述电源模块输出电压为所述被供电终 端充电。
结合第一方面, 第一方面的第一种可能的实现方式, 第一方面的第二种可 能的实现方式, 或者第一方面的第三种可能的实现方式, 在第四种可能的实现 方式中, 所述处理器, 还用于在所述开关闭合状态下, 所述电源模块输出电压 为所述被供电终端充电过程中, 若没有检测到所述电源模块的输出电压的跌落 幅值超过预设值时, 控制所述电源模块输出电压为所述被供电终端充电至结束。
第二方面, 提供一种充电控制方法, 包括:
在与 USB端口的两个数据管脚 D+、 D-并联的开关处于闭合状态下, 电源 模块输出电压为被供电终端充电过程中, 检测到所述电源模块的输出电压的跌 落幅值超过预设值, 控制所述开关断开;
在所述开关断开状态下, 控制所述电源模块输出电压为所述被供电终端充 电。
结合第二方面, 在第一种可能的实现方式中, 在检测到所述电源模块的输 出电压的跌落幅值超过预设值之后, 控制所述开关断开之前, 包括步骤: 控制 所述电源模块停止电压输出。
结合第二方面, 或者第二方面的第一种可能的实现方式, 在第二种可能的 实现方式中, 所述方法还包括:
在所述电源模块输出电压为所述被供电终端充电过程中, 若检测到所述被 供电终端从所述 USB端口拔出时, 控制所述电源模块停止电压输出。
结合第二方面, 第二方面的第一种可能的实现方式, 或者第二方面的第二 种可能的实现方式, 在第三种可能的实现方式中, 在所述开关断开状态下, 控 制所述电源模块输出电压为所述被供电终端充电, 具体包括:
在所述开关断开状态下, 基于 OTG协议控制所述电源模块输出电压为所述 被供电终端充电。
结合第二方面, 第二方面的第一种可能的实现方式, 第二方面的第二种可 能的实现方式, 或者第二方面的第三种可能的实现方式, 在第四种可能的实现 方式中, 在所述开关闭合状态下, 所述电源模块输出电压为所述被供电终端充 电过程中, 若没有检测到所述电源模块的输出电压的跌落幅值超过预设值时, 控制所述电源模块输出电压为所述被供电终端充电至结束。
第三方面, 提供一种充电控制装置, 包括: 检测单元, 在与 USB端口的两个数据管脚 D+、 D-并联的开关处于闭合状 态下, 电源模块输出电压为被供电终端充电过程中, 检测到所述电源模块的输 出电压的跌落幅值超过预设值;
控制单元, 控制所述开关断开, 在所述开关断开状态下, 控制所述电源模 块输出电压为所述被供电终端充电。
结合第三方面, 在第一种可能的实现方式中, 所述控制单元, 具体用于在 检测到所述电源模块的输出电压的跌落幅值超过预设值之后, 控制所述开关断 开之前, 控制所述电源模块停止电压输出。
结合第三方面, 或者第三方面的第一种可能的实现方式, 在第二种可能的 实现方式中, 所述控制单元, 还用于在所述电源模块输出电压为所述被供电终 端充电过程中, 若检测到所述被供电终端从所述 USB端口拔出时, 控制所述电 源模块停止电压输出。
结合第三方面, 第三方面的第一种可能的实现方式, 或者第三方面的第二 种可能的实现方式, 在第三种可能的实现方式中, 所述控制单元, 具体用于在 所述开关断开状态下, 基于 OTG协议控制所述电源模块输出电压为所述被供电 终端充电。
结合第三方面, 第三方面的第一种可能的实现方式, 第三方面的第二种可 能的实现方式, 或者第三方面的第三种可能的实现方式, 在第四种可能的实现 方式中, 所述控制单元, 还用于在所述开关闭合状态下, 所述电源模块输出电 压为所述被供电终端充电过程中, 若没有检测到所述电源模块的输出电压的跌 落幅值超过预设值时, 控制所述电源模块输出电压为所述被供电终端充电至结 束。
根据第一方面提供的供电终端, 第二方面提供的充电控制方法, 或第三方 面提供的充电控制装置, 在供电终端中设置一个开关和 USB端口的两个数据管 脚 D+、 D-并联, 在被供电终端通过该 USB端口***供电终端时控制该开关闭 合, 供电终端模拟标准充电器为被供电终端充电, 当供电终端模拟标准充电器 为被供电终端充电失败时, 再控制该开关断开, 供电终端和被供电终端可以进 行通信, 按照 USB通信协议, 供电终端可以为被供电终端充电, 因此提高了兼 容性。
附图说明
附图用来提供对本发明的进一步理解, 并且构成说明书的一部分, 与本发 明实施例一起用于解释本发明, 并不构成对本发明的限制。 在附图中:
图 1为本发明实施例提供的供电终端的结构示意图;
图 2为本发明实施例提供的充电控制方法的流程图;
图 3为本发明实施例提供的充电控制方法的详细流程图;
图 4为本发明实施例提供的充电控制装置的结构示意图。 具体实施方式
为了提高终端充电方案的兼容性, 本发明实施例提供了一种供电终端、 充 电控制方法及装置, 以下结合说明书附图对本发明的优选实施例进行说明, 应 当理解, 此处所描述的优选实施例仅用于说明和解释本发明, 并不用于限定本 发明。 并且在不冲突的情况下, 本申请中的实施例及实施例中的特征可以相互 组合。
本发明实施例提供一种供电终端, 如图 1所示, 包括 USB端口 101、 开关 102、 电源模块 103和处理器 104, 其中:
USB端口 101 , 用于连接被供电终端;
电源模块 103—端连接于 USB端口 101的电源管脚 VBUS, 用于通过电源 管脚 VBUS为被供电终端充电, 电源模块 103另一端连接于处理器 104—个端 子;
处理器 104的另两端子, 分别与 USB端口 101的两个数据管脚 D+、 D-连 接;
开关 102与两个数据管脚 D+、 D-并联于处理器 104; 在开关 102闭合状态下, 电源模块 103输出电压为该被供电终端充电过程 中, 处理器 104检测到电源模块 103的输出电压的跌落幅值超过预设值, 控制 开关 102断开; 并在开关 102断开状态下, 控制电源模块 103输出电压为该被 供电终端充电。
上述电源模块 103 , 具体可以包括蓄电池和调压电路。
进一步的, 处理器 104 , 具体用于在检测到电源模块 103的输出电压的跌落 幅值超过预设值之后, 控制开关 102断开之前, 控制电源模块 103停止电压输 出。
进一步的, 处理器 104 ,还用于在电源模块 103输出电压为该被供电终端充 电过程中, 若检测到该被供电终端从 USB端口 101拔出时, 控制电源模块 103 停止电压输出。
进一步的,处理器 104,具体用于在开关 102断开状态下,基于 OTG( On The Go )协议控制电源模块 103输出电压为该被供电终端充电。
本发明实施例还提供了一种充电控制方法, 如图 2所示, 包括如下步骤: 步骤 201、在与 USB端口的两个数据管脚 D+、 D-并联的开关处于闭合状态 下, 电源模块输出电压为被供电终端充电过程中, 检测到该电源模块的输出电 压的跌落幅值超过预设值, 控制该开关断开;
步骤 202、在该开关断开状态下, 控制该电源模块输出电压为该被供电终端 充电。
进一步的, 在检测到该电源模块的输出电压的跌落幅值超过预设值之后, 控制该开关断开之前, 包括步骤: 控制该电源模块停止电压输出。
较佳的, 该充电控制方法还可以包括:
在该电源模块输出电压为该被供电终端充电过程中, 若检测到该被供电终 端从该 USB端口拔出时, 控制该电源模块停止电压输出。
进一步的, 步骤 203具体可以为:
在该开关断开状态下, 基于 OTG协议控制该电源模块输出电压为该被供电 终端充电。
下面用具体实施例对本发明提供的充电控制方法进行详细描述。 如下步骤:
步骤 301、当供电终端检测到被供电终端通过 USB端口接入时,控制与 USB 端口的两个数据管脚 D+、 D-并联的开关闭合。
供电终端可以通过检测 USB端口的 ID管脚的电平检测被供电终端是否插 入, 如果 USB端口的 ID管脚的电平被拉低, 则说明被供电终端***。 此部分 为现有技术, 在此不再详述。
步骤 302、 供电终端控制与该 USB端口的电源管脚 VBUS连接的电源模块 输出电压为该被供电终端充电。
此时, 供电终端模拟标准充电器为该被供电终端充电。
现有技术中, USB端口的标准电压为 5V, 能够输出最大为 1A的充电电流 为被供电终端充电。即电源模块输出 5V电压、能够输出最大为 1A的充电电流。
步骤 303、供电终端检测电源模块的输出电压, 判断是否存在电源模块的输 出电压的跌落幅值超过预设值。
当供电终端检测到电源模块的输出电压的跌落幅值超过预设值, 即 USB端 口的电压的跌落幅值超过预设值时, 表明供电终端模拟标准充电器为该被供电 终端充电时,充电能力不能够满足被供电终端的需求,此时进入步骤 304; 否则, 则表明供电终端模拟标准充电器为该被供电终端充电时, 充电能力能够满足被 供电终端的需求, 此时, 供电终端可以模拟标准充电器一直对被供电终端进行 充电, 直至充电完成, 该流程结束。
其中, 预设值可以根据实际情况进行具体设定。
即当供电终端 USB端口能够输出的最大充电电流为 1A时, 如果被供电终 端需求的充电电流的大于 1A, 引起的电压跌落超过了预设值, 进入步骤 304。
步骤 304、 供电终端控制电源模块停止电压输出。 此时, USB端口停止电压输出。
步骤 305、供电终端控制与 USB端口的两个数据管脚 D+、 D-并联的开关断 开。
此时, 供电终端可以和被供电终端通过 USB端口的两个数据管脚 D+、 D- 进行通信, 具体可以基于 OTG协议, 供电终端作为 OTG主设备, 被供电终端 作为 OTG从设备。
上述步骤 304和步骤 305没有必然的先后执行顺序, 在本发明的其它实施 例中, 也可以先执行步骤 305, 再执行步骤 304, 即先控制与 USB端口的两个 数据管脚 D+、 D-并联的开关断开, 再控制电源模块停止电压输出。
步骤 306、 供电终端控制电源模块继续输出电压为被供电终端充电。
此时, USB端口有电压输出。
在 OTG协议中, OTG从设备需求的的充电电流为 500mA , 此时, 供电终 端的充电能力能够满足被供电终端的需求, 供电终端可以一直为被供电终端进 行充电, 直至充电完成。
在上述被供电终端被充电过程中, 当供电终端检测到被供电终端拔出时, 控制电源模块停止电压输出, 使 USB端口停止电压输出。
釆用本发明实施例提供的方法, 兼容性较好, 并且, 供电终端优先模拟标 准充电器为被供电终端充电, 尽可能使被供电终端获得较大的充电电流, 当供 电终端模拟标准充电器为被供电终端充电失败时, 再基于 USB通信协议为被供 电终端充电, 因此能够尽量缩短终端充电时间, 提高充电效率, 提高用户的使 用体验。
基于同一发明构思, 根据本发明上述实施例提供的充电控制方法, 相应地, 本发明实施例还提供一种充电控制装置, 其结构示意图如图 4所示, 具体包括: 检测单元 401 , 在与 USB端口的两个数据管脚 D+、 D-并联的开关处于闭合 状态下, 电源模块输出电压为被供电终端充电过程中, 检测到该电源模块的输 出电压的跌落幅值超过预设值; 控制单元 402, 控制该开关断开, 在该开关断开状态下, 控制该电源模块输 出电压为该被供电终端充电。
进一步的, 控制单元 402, 具体用于在检测到该电源模块的输出电压的跌落 幅值超过预设值之后, 控制该开关断开之前, 控制该电源模块停止电压输出。
进一步的, 控制单元 402, 还用于在该电源模块输出电压为该被供电终端充 电过程中, 若检测到该被供电终端从该 USB端口拔出时, 控制该电源模块停止 电压输出。
进一步的, 控制单元 402 , 具体用于在该开关断开状态下, 基于 OTG协议 控制该电源模块输出电压为该被供电终端充电。
综上所述, 釆用本发明实施例提供的方案, 解决了现有技术中的终端充电 方案兼容性较差的问题。 明的精神和范围。 这样, 倘若本发明的这些修改和变型属于本发明权利要求及 其等同技术的范围之内, 则本发明也意图包含这些改动和变型在内。
+

Claims

权利 要求 书
1、 一种供电终端, 其特征在于, 包括 USB 端口、 开关、 电源模块和处理 器, 其中:
所述 USB端口, 用于连接被供电终端;
所述电源模块一端连接于所述 USB端口的电源管脚 VBUS, 用于通过所述 电源管脚 VBUS为被供电终端充电, 所述电源模块另一端连接于所述处理器一 个端子;
所述处理器的另两端子, 分别与所述 USB端口的两个数据管脚 D+、 D-连 接;
所述开关与所述两个数据管脚 D+、 D-并联于所述处理器;
在所述开关闭合状态下, 所述电源模块输出电压为所述被供电终端充电过 程中, 所述处理器检测到所述电源模块的输出电压的跌落幅值超过预设值, 控 制所述开关断开; 并在所述开关断开状态下, 控制所述电源模块输出电压为所 述被供电终端充电。
2、 如权利要求 1所述的供电终端, 其特征在于, 所述处理器, 具体用于在 检测到所述电源模块的输出电压的跌落幅值超过预设值之后, 控制所述开关断 开之前, 控制所述电源模块停止电压输出。
3、 如权利要求 1或 2所述的供电终端, 其特征在于, 所述处理器, 具体用 于在所述开关断开状态下, 基于 OTG协议控制所述电源模块输出电压为所述被 供电终端充电。
4、 一种充电控制方法, 其特征在于, 包括:
在与 USB端口的两个数据管脚 D+、 D-并联的开关处于闭合状态下, 电源 模块输出电压为被供电终端充电过程中, 检测到所述电源模块的输出电压的跌 落幅值超过预设值, 控制所述开关断开;
在所述开关断开状态下, 控制所述电源模块输出电压为所述被供电终端充 电。
5、 如权利要求 4所述的方法, 其特征在于, 在检测到所述电源模块的输出 电压的跌落幅值超过预设值之后, 控制所述开关断开之前, 包括步骤: 控制所 述电源模块停止电压输出。
6、 如权利要求 4或 5所述的方法, 其特征在于, 在所述开关断开状态下, 控制所述电源模块输出电压为所述被供电终端充电, 具体为:
在所述开关断开状态下, 基于 OTG协议控制所述电源模块输出电压为所述 被供电终端充电。
7、 一种充电控制装置, 其特征在于, 包括:
检测单元, 在与 USB端口的两个数据管脚 D+、 D-并联的开关处于闭合状 态下, 电源模块输出电压为被供电终端充电过程中, 检测到所述电源模块的输 出电压的跌落幅值超过预设值;
控制单元, 控制所述开关断开, 在所述开关断开状态下, 控制所述电源模 块输出电压为所述被供电终端充电。
8、 如权利要求 7所述的装置, 其特征在于, 所述控制单元, 具体用于在检 测到所述电源模块的输出电压的跌落幅值超过预设值之后, 控制所述开关断开 之前, 控制所述电源模块停止电压输出。
9、 如权利要求 7或 8所述的装置, 其特征在于, 所述控制单元, 具体用于 在所述开关断开状态下, 基于 OTG协议控制所述电源模块输出电压为所述被供 电终端充电。
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