技术领域technical field
本发明涉及通信技术领域，具体而言涉及一种充电适配器、终端、充电控制方法。The present invention relates to the field of communication technology, in particular to a charging adapter, a terminal, and a charging control method.
背景技术Background technique
目前的移动终端多采用通过USB接口连接充电适配器进行充电，如图1所示，充电原理为：当充电适配器11与移动终端12连接后，充电适配器中的变压器111将高压220V的交流电转换成5V的直流电，通过USB接口输出到移动终端12，移动终端12的内置充电芯片121再对5V的直流电进行直流变压，最终以合适的电压和电流强度输入电池122。目前移动终端功耗越来越大，电池容量也越来越大，充电发热和充电慢的问题很突出。该充电方式存在以下问题，充电电流难以提高，主要原因是由于从充电适配器输出到电池输入的路径上有损耗，特别是受移动终端充电芯片转换效率制约，很难把充电电流提高到2A以上，即使可以把电流提高到2A以上，也同时增加了充电损耗，这样会导致更为严重的充电发热问题。Most of the current mobile terminals are charged by connecting the charging adapter through the USB interface, as shown in Figure 1, the charging principle is: when the charging adapter 11 is connected to the mobile terminal 12, the transformer 111 in the charging adapter converts the high-voltage 220V alternating current into 5V The DC power is output to the mobile terminal 12 through the USB interface, and the built-in charging chip 121 of the mobile terminal 12 performs DC transformation on the 5V DC power, and finally inputs it into the battery 122 with a suitable voltage and current intensity. At present, the power consumption of mobile terminals is increasing, and the battery capacity is also increasing. The problems of charging heat and slow charging are very prominent. This charging method has the following problems. It is difficult to increase the charging current. The main reason is that there is a loss on the path from the output of the charging adapter to the input of the battery. In particular, it is difficult to increase the charging current to more than 2A due to the conversion efficiency of the charging chip of the mobile terminal. Even if the current can be increased to more than 2A, the charging loss will be increased at the same time, which will lead to more serious charging heating problems.
发明内容Contents of the invention
本发明提供一种充电适配器、终端、充电控制方法及装置，用以解决现有技术中存在的充电电流难以提高的问题。The invention provides a charging adapter, a terminal, a charging control method and a device to solve the problem in the prior art that the charging current is difficult to increase.
根据本发明的一个方面，提供了一种充电适配器，包括：交流变压器、直流变压器、外置充电芯片以及微控制器；交流变压器的输出端分别与直流变压器以及外置充电芯片相连；微控制器用于在充电适配器与终端有效连接后，控制交流变压器提供直流输出，控制直流变压器进行直流变压输出，以及，在充电适配器与终端建立握手连接后，控制外置充电芯片对终端进行充电。According to one aspect of the present invention, a charging adapter is provided, including: an AC transformer, a DC transformer, an external charging chip, and a microcontroller; the output terminals of the AC transformer are respectively connected to the DC transformer and the external charging chip; After the charging adapter is effectively connected to the terminal, control the AC transformer to provide DC output, control the DC transformer to output DC voltage, and, after the charging adapter and the terminal establish a handshake connection, control the external charging chip to charge the terminal.
进一步的，上述充电适配器还包括：具有扩展直流输入管脚以及扩展接地管脚的通用串行总线USB接口；外置充电芯片的直流输出端与USB接口的扩展直流输入管脚连接，USB接口的扩展接地管脚接地。Further, the above-mentioned charging adapter also includes: a universal serial bus USB interface with an extended DC input pin and an extended ground pin; the DC output end of the external charging chip is connected to the extended DC input pin of the USB interface, and the USB interface The extended ground pin is grounded.
根据本发明的另一个方面，还提供了一种终端，包括：充电保护电路、电池、内置充电芯片以及控制器；电池的正极分别与内置充电芯片以及充电保护电路相连；控制器，用于在终端与充电适配器建立握手连接后，向充电保护电路发送控制信号，以使充电保护电路工作；充电保护电路，用于在接收到来自控制器的控制信号并且充电保护电路的输入端电压低于预设参考电压时，开启由充电适配器中的外置充电芯片为电池充电的充电通路。According to another aspect of the present invention, a terminal is also provided, including: a charging protection circuit, a battery, a built-in charging chip, and a controller; the positive pole of the battery is connected to the built-in charging chip and the charging protection circuit; After the terminal establishes a handshake connection with the charging adapter, it sends a control signal to the charging protection circuit to make the charging protection circuit work; the charging protection circuit is used to receive the control signal from the controller and the input voltage of the charging protection circuit is lower than the predetermined When setting the reference voltage, open the charging path for the battery to be charged by the external charging chip in the charging adapter.
其中，充电保护电路包括：电压比较器、逻辑门电路、和可控开关电路；电压比较器的第一输入端与终端的充电接口相连，电压比较器的第二输入端用于接收一预设参考电压，其输出端与逻辑门电路的第一输入端相连；逻辑门电路的第二输入端与终端的CPU相连，逻辑门电路的输出端与可控开关电路的控制端相连；可控开关电路其余两端连接在终端的充电接口与电池之间；当充电保护电路的输入端电压输入到电压比较器的第一输入端时，若电压比较器的第一输出端输入的电压小于预设参考电压，则逻辑门电路的输出控制终端的充电接口与电池之间的电路导通；否则，逻辑门电路的输出控制终端的充电接口与电池之间的电路断开。Wherein, the charging protection circuit includes: a voltage comparator, a logic gate circuit, and a controllable switch circuit; the first input terminal of the voltage comparator is connected to the charging interface of the terminal, and the second input terminal of the voltage comparator is used to receive a preset Reference voltage, its output terminal is connected with the first input terminal of the logic gate circuit; the second input terminal of the logic gate circuit is connected with the CPU of the terminal, and the output terminal of the logic gate circuit is connected with the control terminal of the controllable switch circuit; the controllable switch The remaining two ends of the circuit are connected between the charging interface of the terminal and the battery; when the input terminal voltage of the charging protection circuit is input to the first input terminal of the voltage comparator, if the voltage input by the first output terminal of the voltage comparator is less than the preset Reference voltage, the circuit between the charging interface of the output control terminal of the logic gate circuit and the battery is turned on; otherwise, the circuit between the charging interface of the output control terminal of the logic gate circuit and the battery is disconnected.
进一步的，终端还包括具有扩展直流输入管脚以及扩展接地管脚的USB接口；扩展直流输入管脚与电压比较器的第一输入端相连，USB接口的扩展接地管脚接地。Further, the terminal also includes a USB interface with an extended DC input pin and an extended ground pin; the extended DC input pin is connected to the first input end of the voltage comparator, and the extended ground pin of the USB interface is grounded.
根据本发明的在一方面，还提供了一种充电控制方法，在充电适配器侧执行的流程，包括：在充电适配器与终端有效连接后，通过微控制器控制交流变压器向直流变压器和外置充电芯片输出直流电压，以及控制直流变压器输出第一充电电压，对终端进行充电；在充电适配器与终端建立握手连接之后，通过微控制器控制外置充电芯片基于交流变压器输出的直流电压输出第二充电电压，对终端进行充电。According to one aspect of the present invention, there is also provided a charging control method. The process executed on the charging adapter side includes: after the charging adapter is effectively connected to the terminal, the microcontroller controls the AC transformer to charge the DC transformer and the external The chip outputs DC voltage, and controls the DC transformer to output the first charging voltage to charge the terminal; after the charging adapter establishes a handshake connection with the terminal, the microcontroller controls the external charging chip to output the second charging based on the DC voltage output by the AC transformer. voltage to charge the terminal.
其中，充电适配器与终端建立握手连接包括：充电适配器向终端发送握手消息，握手消息包括：充电适配器的识别标志；充电适配器接收来自终端的握手响应消息，握手响应消息包括：是否支持快速充电、输入电压、以及输入电流。Wherein, the establishment of a handshake connection between the charging adapter and the terminal includes: the charging adapter sends a handshake message to the terminal, the handshake message includes: the identification mark of the charging adapter; the charging adapter receives a handshake response message from the terminal, the handshake response message includes: whether to support fast charging, input voltage, and input current.
其中，控制外置充电芯片基于交流变压器输出直流电压对终端进行充电，包括：在接收到握手响应信息后，控制开启外置充电芯片，根据握手响应信息配置外置充电芯片，向终端发送充电就绪消息；获取来自终端的充电状态消息；重新向终端发送充电就绪消息，直到获取终端返回的充电结束消息。Among them, controlling the external charging chip to charge the terminal based on the DC voltage output by the AC transformer includes: after receiving the handshake response information, controlling the opening of the external charging chip, configuring the external charging chip according to the handshaking response information, and sending the charging ready message to the terminal. message; obtain the charging status message from the terminal; resend the charging ready message to the terminal until the charging end message returned by the terminal is obtained.
根据本发明的还一方面，提供了一种充电控制方法，在终端侧执行的流程，包括：在终端与充电适配器有效连接后，通过控制器控制内置充电芯片基于充电适配器输出的第一充电电压为电池充电；在终端与充电适配器建立握手连接之后，通过控制器控制充电保护电路是否开启充电通道，充电通道，用于接收充电适配器输出的第二充电电压为电池充电。According to still another aspect of the present invention, a charging control method is provided. The process executed on the terminal side includes: after the terminal is effectively connected to the charging adapter, the controller controls the built-in charging chip based on the first charging voltage output by the charging adapter Charging the battery; after the terminal establishes a handshake connection with the charging adapter, the controller controls whether the charging protection circuit opens the charging channel, and the charging channel is used to receive the second charging voltage output by the charging adapter to charge the battery.
其中，终端与充电适配器建立握手连接包括：当终端接收到充电适配器发来的握手消息时，向充电适配器反馈握手响应消息，握手响应消息包括：是否支持快速充电、输入电压、以及输入电流。Wherein, establishing a handshake connection between the terminal and the charging adapter includes: when the terminal receives a handshake message from the charging adapter, feeding back a handshake response message to the charging adapter. The handshake response message includes: whether to support fast charging, input voltage, and input current.
本发明实施例通过对现有充电适配器进行改进，在充电适配器内部增加外置充电芯片，以及为外置充电芯片提供直流电压的交流变压器，可以加大对终端的充电电流，提高充电效率。The embodiment of the present invention improves the existing charging adapter, adds an external charging chip inside the charging adapter, and an AC transformer that provides DC voltage for the external charging chip, which can increase the charging current for the terminal and improve the charging efficiency.
附图说明Description of drawings
图1是现有技术中充电适配器与终端的充电电路示意图；FIG. 1 is a schematic diagram of a charging circuit of a charging adapter and a terminal in the prior art;
图2为本发明实施例的充电适配器的电路原理图；2 is a schematic circuit diagram of a charging adapter according to an embodiment of the present invention;
图3为本发明实施例提供的终端的电路原理图；FIG. 3 is a schematic circuit diagram of a terminal provided by an embodiment of the present invention;
图4是本发明实施例提供的终端中充电保护电路的电路原理图；FIG. 4 is a schematic circuit diagram of a charging protection circuit in a terminal provided by an embodiment of the present invention;
图5是本实施例提供的充电控制方法在充电适配器侧执行的流程；FIG. 5 is a flowchart of the charging control method provided by this embodiment executed on the charging adapter side;
图6是本实施例提供的充电控制方法在终端侧执行的流程；FIG. 6 is a flowchart of the charging control method provided by this embodiment executed on the terminal side;
图7是本发明实施例充电适配器对终端的加力充电阶段的流程图。Fig. 7 is a flow chart of the afterburner charging phase of the terminal by the charging adapter according to the embodiment of the present invention.
具体实施方式detailed description
为更进一步阐述本发明为达成预定目的所采取的技术手段及功效，以下结合附图及较佳实施例，对本发明进行详细说明如后。In order to further explain the technical means and functions adopted by the present invention to achieve the intended purpose, the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.
图2为本发明实施例的充电适配器的电路原理图，如图2所示，该充电适配器，包括：交流变压器、直流变压器、外置充电芯片(即外置charger)以及微控制器；其中，交流变压器的输出端分别与直流变压器以及外置充电芯片相连；微控制器用于在充电适配器与终端有效连接后，控制交流变压器提供直流输出，控制直流变压器进行直流变压输出，以及，在充电适配器与终端建立握手连接后，控制外置充电芯片对终端进行充电，需要说明的是，本文中提到的充电芯片即为charger，它是一个直流变压器，具有将一个高直流电压转换为低直流电压的功能，也具有过压保护等功能；为了表达简洁，本发明的实施例附图中，均用“charger”表示“充电芯片”。Fig. 2 is a schematic circuit diagram of a charging adapter according to an embodiment of the present invention. As shown in Fig. 2, the charging adapter includes: an AC transformer, a DC transformer, an external charging chip (i.e., an external charger) and a microcontroller; wherein, The output terminals of the AC transformer are respectively connected to the DC transformer and the external charging chip; the microcontroller is used to control the AC transformer to provide DC output after the charging adapter is effectively connected to the terminal, and to control the DC transformer to perform DC transformation output, and, in the charging adapter After establishing a handshake connection with the terminal, control the external charging chip to charge the terminal. It should be noted that the charging chip mentioned in this article is the charger, which is a DC transformer that can convert a high DC voltage into a low DC voltage. It also has functions such as overvoltage protection; in order to express concisely, in the drawings of the embodiments of the present invention, "charger" is used to represent "charging chip".
该充电适配器的工作原理为：在充电适配器与充电终端有效连接并且未与终端建立握手连接的情况下，交流变压器将外部提供的交流电压转化为10V左右的直流电压，由直流变压器将该直流电压变压为5V直流电压后，输入给终端，而在充电适配器与终端建立握手连接后，充电适配器中的微控制器，控制开启设置于其内部的外置充电芯片，该外置充电芯片根据来自与交流变压器转换后的直流电压为终端充电。The working principle of the charging adapter is: when the charging adapter is effectively connected to the charging terminal and has not established a handshake connection with the terminal, the AC transformer converts the external AC voltage into a DC voltage of about 10V, and the DC voltage is converted by the DC transformer. After the voltage is transformed into 5V DC voltage, it is input to the terminal, and after the charging adapter establishes a handshake connection with the terminal, the microcontroller in the charging adapter controls to turn on the external charging chip installed inside it. The DC voltage converted with the AC transformer charges the terminals.
本实施例提供的充电适配器，是在目前现有的终端充电适配器上额外增加了一个充电通道来对终端进行充电，基于此，需要扩展充电适配器的USB接口，可以在原有的5PINUSB接口基础上，额外扩充或两个电源线，形成7PIN的接口结构，该接口需要兼容标准5PINUSB接口，两个扩展管脚的名称为EX_DC_IN，即扩展直流输入，以及EX_GND，即扩展接地，如图1所示，外置充电芯片的直流输出端与USB的扩展直流输入管脚连接，USB接口扩展接地管脚接地，如图所示，USB接口的扩展接地管脚与接地管脚连接，直流变压器的5V直流输出端与USB接口的VBUS管脚相连。The charging adapter provided in this embodiment is an additional charging channel added to the existing terminal charging adapter to charge the terminal. Based on this, it is necessary to expand the USB interface of the charging adapter, which can be based on the original 5PINUSB interface. Additional expansion or two power lines form a 7PIN interface structure. This interface needs to be compatible with the standard 5PINUSB interface. The names of the two extension pins are EX_DC_IN, which is the extended DC input, and EX_GND, which is the extended ground, as shown in Figure 1. The DC output terminal of the external charging chip is connected to the extended DC input pin of the USB, and the extended ground pin of the USB interface is grounded. As shown in the figure, the extended ground pin of the USB interface is connected to the ground pin, and the 5V DC output of the DC transformer The terminal is connected to the VBUS pin of the USB interface.
图3为本发明实施例提供的终端的电路原理图，如图3所示，该终端包括：充电保护电路、电池以及内置充电芯片以及控制器；其中，电池的正极分别与内置充电芯片以及充电保护电路相连；控制器，控制器用于在终端与充电适配器建立握手连接后，向充电保护电路发送控制信号，以使充电保护电路工作；充电保护电路用于在接收到来自控制器的控制信号并且充电保护电路的输入端电压低于预设参考电压时，开启由充电适配器中的外置充电芯片为电池充电的充电通路。Fig. 3 is a circuit schematic diagram of the terminal provided by the embodiment of the present invention. As shown in Fig. 3, the terminal includes: a charging protection circuit, a battery, a built-in charging chip and a controller; The protection circuit is connected; the controller is used to send a control signal to the charging protection circuit after the terminal and the charging adapter establish a handshake connection, so that the charging protection circuit works; the charging protection circuit is used to receive the control signal from the controller and When the voltage at the input terminal of the charging protection circuit is lower than the preset reference voltage, the charging channel for charging the battery by the external charging chip in the charging adapter is opened.
图4是本发明实施例提供的终端中充电保护电路的电路原理图。Fig. 4 is a schematic circuit diagram of a charging protection circuit in a terminal provided by an embodiment of the present invention.
如图4所示，该充电保护电路可以包括：电压比较器、逻辑门电路、可控开关电路、该可控开关电路具体可以采用MOS管来实现；电压比较器的第一输入端与终端的充电接口相连，电压比较器的第二输入端用于接收一预设参考电压，其输出端与逻辑门电路的第一输入端相连；逻辑门电路的第二输入端与终端的CPU相连，逻辑门电路的输出端与可控开关电路的控制端相连。As shown in Figure 4, the charging protection circuit may include: a voltage comparator, a logic gate circuit, a controllable switch circuit, and the controllable switch circuit may specifically be realized by using a MOS tube; the first input terminal of the voltage comparator and the terminal The charging interface is connected, the second input terminal of the voltage comparator is used to receive a preset reference voltage, and its output terminal is connected with the first input terminal of the logic gate circuit; the second input terminal of the logic gate circuit is connected with the CPU of the terminal, and the logic gate circuit The output terminal of the gate circuit is connected with the control terminal of the controllable switch circuit.
可控开关电路其余两端连接在终端的充电接口与电池之间；当充电保护电路的输入端电压输入到电压比较器的第一输入端时，若电压比较器的第一输出端输入的电压小于预设参考电压，则逻辑门电路的输出控制终端的充电接口与电池之间的电路导通；否则，逻辑门电路的输出控制终端的充电接口与电池之间的电路断开。该充电保护电路的电压比较器用于对充电适配器通过外置充电芯片提供的电压与一参考电压进行比较，以判断外置充电芯片提供的电压是否过高，逻辑门电路用于根据终端内的控制器的信号以及电压比较器的比较结果两个条件来确定是否控制开启MOS管，具体地，在电压比较器判断外置充电芯片提供的电压没有超过一预设值并且控制器向该逻辑门电路输出控制信号时，控制开启MOS管，其中，控制器在检测到终端与充电适配器成功建立握手连接后，即可以向逻辑门电路发出控制信号，二级管起到防止电流反向的作用。The remaining two ends of the controllable switch circuit are connected between the charging interface of the terminal and the battery; when the input terminal voltage of the charging protection circuit is input to the first input terminal of the voltage comparator, if the voltage input by the first output terminal of the voltage If the voltage is lower than the preset reference voltage, the output of the logic gate circuit controls the circuit between the charging interface of the terminal and the battery; otherwise, the output of the logic gate circuit controls the circuit between the charging interface of the terminal and the battery to disconnect. The voltage comparator of the charging protection circuit is used to compare the voltage provided by the charging adapter through the external charging chip with a reference voltage to determine whether the voltage provided by the external charging chip is too high. The signal of the voltage comparator and the comparison result of the voltage comparator are used to determine whether to control the opening of the MOS tube. Specifically, when the voltage comparator judges that the voltage provided by the external charging chip does not exceed a preset value and the controller sends a signal to the logic gate circuit When the control signal is output, the control turns on the MOS tube. After the controller detects that the terminal and the charging adapter have successfully established a handshake connection, it can send a control signal to the logic gate circuit, and the diode prevents the reverse current.
终端还包括具有扩展直流输入管脚以及扩展接地管脚的USB接口；扩展直流输入管脚与电压比较器的第一输入端相连，USB接口的扩展接地管脚接地，即，USB接口的接地管脚与扩展接地管脚连接，USB接口的VBUS脚与内置充电芯片的输入端相连，为其提供输入电源。The terminal also includes a USB interface with an extended DC input pin and an extended ground pin; the extended DC input pin is connected to the first input end of the voltage comparator, and the extended ground pin of the USB interface is grounded, that is, the ground pin of the USB interface The pin is connected to the extended ground pin, and the VBUS pin of the USB interface is connected to the input end of the built-in charging chip to provide input power for it.
图5是本实施例提供的充电控制方法在充电适配器侧执行的流程，如图5所示，该方法包括以下步骤：Fig. 5 is the flow of the charging control method provided by this embodiment executed on the charging adapter side, as shown in Fig. 5, the method includes the following steps:
步骤401：在充电适配器与终端有效连接后，通过微控制器控制交流变压器向直流变压器和外置充电芯片输出直流电压，以及控制直流变压器输出第一充电电压，对终端进行充电；Step 401: After the charging adapter is effectively connected to the terminal, the microcontroller controls the AC transformer to output a DC voltage to the DC transformer and an external charging chip, and controls the DC transformer to output a first charging voltage to charge the terminal;
步骤402：在充电适配器与终端建立握手连接之后，通过微控制器控制外置充电芯片基于交流变压器输出的直流电压输出第二充电电压，对终端进行充电。Step 402: After the charging adapter establishes a handshake connection with the terminal, the microcontroller controls the external charging chip to output a second charging voltage based on the DC voltage output by the AC transformer to charge the terminal.
其中充电适配器与终端建立握手连接具体可以包括：充电适配器向终端发送握手消息，握手消息包括：充电适配器的识别标志；充电适配器接收来自终端的握手响应消息，握手响应消息包括：是否支持快速充电、输入电压、输入电流。The establishment of a handshake connection between the charging adapter and the terminal may specifically include: the charging adapter sends a handshake message to the terminal, the handshake message includes: the identification mark of the charging adapter; the charging adapter receives a handshake response message from the terminal, the handshake response message includes: whether to support fast charging, Input voltage, input current.
控制外置充电芯片基于交流变压器输出直流电压对终端进行充电，包括：Control the external charging chip to charge the terminal based on the DC voltage output by the AC transformer, including:
在接收到握手响应消息后，控制开启外置充电芯片，根据握手响应信息配置外置充电芯片，向终端发送充电就绪消息；获取来自终端的充电状态信息；重新向终端发送充电就绪消息，直到获取终端返回的充电结束消息。其中，终端的充电状态消息为其在接收到充电配置器的充电就绪消息后的反馈消息，该充电状态消息用于指示终端目前的充电状态，以便充电适配器根据该充电状态消息确定是否继续为终端充电。After receiving the handshake response message, control to turn on the external charging chip, configure the external charging chip according to the handshake response information, and send the charging ready message to the terminal; obtain the charging status information from the terminal; send the charging ready message to the terminal again until the charging ready message is obtained The charging end message returned by the terminal. Among them, the charging status message of the terminal is a feedback message after receiving the charging ready message from the charging configurator. The charging status message is used to indicate the current charging status of the terminal, so that the charging adapter can determine whether to continue to charge the terminal according to the charging status message. Charge.
图6是本实施例提供的充电控制方法在终端侧执行的流程，如图6所示，该方法包括以下步骤：FIG. 6 is a flow of the charging control method provided by this embodiment executed on the terminal side. As shown in FIG. 6, the method includes the following steps:
步骤501：在终端与充电适配器有效连接后，通过控制器控制内置充电芯片基于充电适配器输出的第一充电电压为电池充电；Step 501: After the terminal is effectively connected to the charging adapter, the controller controls the built-in charging chip to charge the battery based on the first charging voltage output by the charging adapter;
步骤502：在终端与充电适配器建立握手连接之后，通过控制器控制充电保护电路是否开启充电通道，充电通道，用于接收充电适配器输出的第二充电电压为电池充电。Step 502: After the terminal establishes a handshake connection with the charging adapter, the controller controls whether the charging protection circuit opens the charging channel, and the charging channel is used to receive the second charging voltage output by the charging adapter to charge the battery.
其中，终端与充电适配器建立握手连接包括：当终端接收到充电适配器发来的握手消息时，向充电适配器反馈握手响应消息，握手响应消息包括：是否支持快速充电、输入电压、以及输入电流。Wherein, establishing a handshake connection between the terminal and the charging adapter includes: when the terminal receives a handshake message from the charging adapter, feeding back a handshake response message to the charging adapter. The handshake response message includes: whether to support fast charging, input voltage, and input current.
本发明实施例提供的充电适配器对终端进行充电的过程可以分为常规充电阶段和加力充电阶段两部分：The charging adapter provided by the embodiment of the present invention charges the terminal in a process that can be divided into two parts: a conventional charging stage and an afterburning charging stage:
初始阶段下，充电适配器与终端连接后，充电适配器的直流变压器的5V直流输出默认打开，其与USB接口的VBUS脚相连，DC-DC输出端与USB扩展引脚EX_DC_IN相连。支持快速充电的移动终端的内置充电芯片关闭，该内置充电芯片的输入端与VBUS相连，输出端与电池正极相连；USB扩展管脚X_DC_IN与快速充电通道相连，快速充电通道的MOS管开关默认处于断开状态，末端与电池正极相连。In the initial stage, after the charging adapter is connected to the terminal, the 5V DC output of the DC transformer of the charging adapter is turned on by default, which is connected to the VBUS pin of the USB interface, and the DC-DC output terminal is connected to the USB extension pin EX_DC_IN. The built-in charging chip of the mobile terminal that supports fast charging is turned off. The input terminal of the built-in charging chip is connected to VBUS, and the output terminal is connected to the positive pole of the battery; the USB extension pin X_DC_IN is connected to the fast charging channel, and the MOS tube switch of the fast charging channel is at default In the disconnected state, the end is connected to the positive pole of the battery.
常规充电阶段即为充电适配器与终端连接后，充电适配器的直流变压器的5V直流输出通过USB的VBUS端进入终端的VBUS端；终端内的控制器检测到VUBS有效，则打开内置充电芯片对VBUS输入进行直流变压后输入电池正极。The normal charging stage is that after the charging adapter is connected to the terminal, the 5V DC output of the DC transformer of the charging adapter enters the VBUS terminal of the terminal through the VBUS terminal of the USB; when the controller in the terminal detects that VUBS is valid, it turns on the built-in charging chip to input VBUS After DC transformation, input the positive pole of the battery.
图7是本发明实施例充电适配器对终端的加力充电阶段的流程图。Fig. 7 is a flow chart of the afterburner charging phase of the terminal by the charging adapter according to the embodiment of the present invention.
其中，充电适配器侧的充电流程如下：Among them, the charging process on the charging adapter side is as follows:
步骤601：充电适配器与终端连接；Step 601: Connect the charging adapter to the terminal;
步骤602：充电适配器启动充电流程，输出5V直流电压；Step 602: The charging adapter starts the charging process and outputs a 5V DC voltage;
步骤603：充电适配器向终端发送握手消息1；Step 603: The charging adapter sends a handshake message 1 to the terminal;
步骤604：如果设备连接异常，则关闭加力充电，返回初始状态；Step 604: If the device connection is abnormal, turn off afterburner charging and return to the initial state;
其中加力充电即为通过充电适配器中的外置充电芯片对终端进行充电。The afterburner charging refers to charging the terminal through the external charging chip in the charging adapter.
步骤605：等待来自终端的握手消息2；Step 605: Waiting for handshake message 2 from the terminal;
步骤606：判断与充电适配器的握手连接是否成功，如果是，则执行步骤607，如果否，则返回步骤604；Step 606: Determine whether the handshake connection with the charging adapter is successful, if yes, execute step 607, if not, return to step 604;
步骤607：根据握手消息2中的信息配置外置充电芯片，启动充电；Step 607: configure the external charging chip according to the information in the handshake message 2, and start charging;
步骤608：向终端发送充电就绪消息3；Step 608: Send charging ready message 3 to the terminal;
步骤609：等待来自终端的充电状态消息4；Step 609: Waiting for charging status message 4 from the terminal;
步骤610：判断终端是否及时响应，如果是则返回步骤608，如果否，则返回步骤604，指导终端反馈充电完成消息。Step 610: Determine whether the terminal responds in time, if yes, return to step 608, if not, return to step 604, and instruct the terminal to feed back a charging completion message.
其中，终端侧的充电流程包括：Among them, the charging process on the terminal side includes:
步骤701：终端与充电适配器连接；Step 701: Connect the terminal to the charging adapter;
步骤702：检测到VBUS有效，则启动内置充电芯片进行充电；Step 702: Detect that VBUS is valid, start the built-in charging chip to charge;
步骤703：等待来自充电适配器侧的握手消息1；Step 703: Waiting for handshake message 1 from the charging adapter side;
步骤704：如果设备连接异常，则关闭充电通道，返回初始状态；Step 704: If the device connection is abnormal, close the charging channel and return to the initial state;
步骤705：判断握手连接是否成功，如果握手连接成功，则执行步骤706，如果握手连接失败，则返回步骤704；Step 705: Determine whether the handshake connection is successful, if the handshake connection is successful, execute step 706, if the handshake connection fails, return to step 704;
步骤706：向充电适配器发送握手消息2；Step 706: Send handshake message 2 to the charging adapter;
步骤707：等待来自充电适配器侧的充电就绪消息3；Step 707: Waiting for the charging ready message 3 from the charging adapter side;
步骤708：判断终端侧是否及时响应充电就绪消息3，如果是，则执行步骤709，如果否，则返回步骤705。Step 708: Determine whether the terminal side responds to the charging ready message 3 in time, if yes, execute step 709, if not, return to step 705.
本发明实施例的提供的充电适配器，通过在常规充电适配器中增加外置充电芯片，可以灵活的提供常规充电功能和加力充电功能，以增加充电电流，从而达到快速充电的目的。同时，由于在充电适配器中增加了外置充电芯片，可以分担由于充电在终端侧产生的热量，不会将热量集中在一侧设备上，即使在超大电流充电时也不会引起任何一侧设备过度发热。The charging adapter provided by the embodiment of the present invention can flexibly provide the conventional charging function and the afterburning charging function by adding an external charging chip to the conventional charging adapter to increase the charging current so as to achieve the purpose of fast charging. At the same time, due to the addition of an external charging chip in the charging adapter, it can share the heat generated on the terminal side due to charging, and will not concentrate the heat on one side of the device. Excessive fever.
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。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。Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.
| Application Number | Priority Date | Filing Date | Title |
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| CN201410301785.6ACN104065147B (en) | 2014-06-27 | 2014-06-27 | A kind of charging adapter, terminal, charge control method |
| Application Number | Priority Date | Filing Date | Title |
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| CN201410301785.6ACN104065147B (en) | 2014-06-27 | 2014-06-27 | A kind of charging adapter, terminal, charge control method |
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| CN104065147A CN104065147A (en) | 2014-09-24 |
| CN104065147Btrue CN104065147B (en) | 2017-06-06 |
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| CN201410301785.6AActiveCN104065147B (en) | 2014-06-27 | 2014-06-27 | A kind of charging adapter, terminal, charge control method |
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