Wearable device, charging device and charging system

Abstract

The invention provides wearable equipment, charging equipment and a charging system, the wearable equipment comprises a charging circuit and a first carrier communication circuit, the charging circuit is connected with a first charging terminal, a battery and a control circuit, a first port of the first carrier communication circuit is connected with a power line, and a second port of the first carrier communication circuit is connected with the control circuit. In the embodiment of the invention, the data signal is carried to the power line in a carrier communication manner, so that the wired data communication between the wearable device and other external devices can be realized at a relatively low cost without changing the appearance structure of the wearable device, such as without adding extra pins or data interfaces; application scenes and functions of the wearable device are expanded, for example, wired data interaction between the wearable device and a PC or fast charging protocol interaction between the wearable device and a power adapter is achieved, and fast charging connection is achieved.

Description

Technical Field

[0001] This disclosure relates to the field of electronic device technology, specifically to a wearable device, a charging device, and a charging system. Background Technology

[0002] With the development of electronic devices, wearable devices have shown great market potential. Smartwatches, smart bracelets, and TWS (True Wireless Stereo) earphones have become the most commonly used wearable devices in people's daily lives.

[0003] Currently, wired charging for wearable devices primarily involves an adapter connecting to a charging dock, which in turn connects to the device. This means the wearable device has metal pins for charging. When the dock is connected to the wearable device, these metal pins contact the pins on the dock to establish an electrical connection. For example, a smartwatch typically has two metal pins on its back. After the watch is connected to the charging dock, these pins on the back of the watch contact the pins on the charging dock, thus achieving a wired charging connection.

[0004] However, this method can only enable wired charging of wearable devices, and cannot enable wired data communication between wearable devices and other devices. Summary of the Invention

[0005] In order to establish a wired data communication connection between wearable devices and other devices, embodiments of this disclosure provide a wearable device, a charging device, and a charging system.

[0006] In a first aspect, embodiments of this disclosure provide a wearable device, including:

[0007] A charging circuit includes a power input terminal and a power output terminal, wherein the power input terminal is connected to a first charging terminal and the power output terminal is connected to a battery and a control circuit.

[0008] The first carrier communication circuit includes a first port and a second port. The first port is connected to the power line between the charging circuit and the first charging terminal, and the second port is connected to the control circuit.

[0009] The first carrier communication circuit is configured to: receive a data signal sent by the control circuit and modulate the data signal onto the power line; and / or demodulate the data signal on the power line and send the data signal to the control circuit.

[0010] In some embodiments, the charging circuit includes a buck converter circuit and a charge pump circuit. The power input terminals of both the buck converter circuit and the charge pump circuit are connected to the first charging terminal. The power output terminal of the buck converter circuit is connected to the battery and the control circuit, and the power output terminal of the charge pump circuit is connected to the battery.

[0011] In some embodiments, the control circuit is configured to:

[0012] Receive data signals demodulated by the first carrier communication circuit, the data signals including charging parameters supported by the power supply equipment;

[0013] A fast charging request signal is generated based on the charging parameters and the current cell voltage of the battery.

[0014] The fast charging request signal is modulated onto the power line through the first carrier communication circuit, and the charge pump circuit is controlled to connect to the charging link of the battery.

[0015] In some embodiments, the control circuit is configured to:

[0016] During the charging process of the battery by the charge pump circuit, the cell voltage and cell current of the battery are detected;

[0017] In response to the cell current being less than a preset threshold, the requested voltage included in the fast charging request signal is increased successively by a preset voltage increment, and the fast charging request signal is modulated onto the power line through the first carrier communication circuit until the cell current is not less than the preset threshold.

[0018] In some embodiments, the control circuit is configured to:

[0019] In response to the battery cell voltage reaching a preset voltage value, the buck converter circuit is controlled to connect to the charging link of the battery.

[0020] A charging request signal is sent to the first carrier communication circuit, and the charging request signal is modulated onto the power line through the first carrier communication circuit.

[0021] In some embodiments, the first carrier communication circuit includes a coupling circuit, a signal driving circuit, and a signal demodulation circuit. One end of the coupling circuit is connected to the power line, and the other end is connected to the signal driving circuit and the signal demodulation circuit, respectively. The signal driving circuit and the signal demodulation circuit are connected to the control circuit.

[0022] In some embodiments, the coupling circuit includes a first capacitor and a first inductor connected in series;

[0023] The signal driving circuit includes a first transistor, a second transistor, and a second inductor. One end of the second inductor is connected to the control circuit, and the other end is connected to the gates of the first transistor and the second transistor. The source of the first transistor is connected to a high level, and the source of the second transistor is connected to a low level. The drains of the first transistor and the second transistor are both connected to the coupling circuit.

[0024] The signal demodulation circuit includes a follower circuit, a comparator circuit, and a digital signal processing circuit connected in series.

[0025] In some embodiments, the wearable device further includes a first isolation inductor disposed between a first node and the power input terminal of the charging circuit, wherein the first node represents the connection point between the first carrier communication circuit and the power line.

[0026] Secondly, embodiments of this disclosure provide a charging device, including:

[0027] A power supply circuit, wherein the input terminal of the power supply circuit is used to connect to the power output port of the power supply device, and the output terminal is connected to the second charging terminal of the charging device;

[0028] The second carrier communication circuit includes a third port and a fourth port. The third port is connected to the power line between the power supply circuit and the second charging terminal, and the fourth port is used to connect to the data port of the power supply device.

[0029] The second carrier communication circuit is configured to: receive a data signal sent by the power supply device and modulate the data signal onto the power line; and / or demodulate the data signal on the power line and send the data signal to the power supply device.

[0030] In some embodiments, the charging device further includes a protocol communication circuit, through which the second carrier communication circuit is connected to the data port. The protocol communication circuit is configured to: receive and process data signals sent by the power supply device, and send the data signals to the second carrier communication circuit; and / or receive and process data signals demodulated by the second carrier communication circuit, and send the data signals to the power supply device.

[0031] In some embodiments, the charging device further includes a microprocessor chip circuit, through which the second carrier communication circuit is connected to the protocol communication circuit. The microprocessor chip circuit is configured to: control the modulation signal of the first carrier communication circuit according to the data signal sent by the protocol communication circuit; and / or receive the demodulated data signal of the first carrier communication circuit and send it to the protocol communication circuit.

[0032] In some embodiments, the second carrier communication circuit includes a coupling circuit, a signal driving circuit, and a signal demodulation circuit. One end of the coupling circuit is connected to the power line, and the other end is connected to the signal driving circuit and the signal demodulation circuit, respectively. The signal driving circuit and the signal demodulation circuit are connected to the microprocessor chip circuit.

[0033] In some embodiments, the coupling circuit includes a first capacitor and a first inductor connected in series;

[0034] The signal driving circuit includes a first transistor, a second transistor, and a second inductor. One end of the second inductor is connected to the microprocessor chip circuit, and the other end is connected to the gates of the first transistor and the second transistor. The source of the first transistor is connected to a high level, the source of the second transistor is connected to a low level, and the drains of the first transistor and the second transistor are both connected to the coupling circuit.

[0035] The signal demodulation circuit includes a follower circuit, a comparator circuit, and a digital signal processing circuit connected in series.

[0036] In some embodiments, the charging device further includes a second isolation inductor disposed between the second node and the output terminal of the power supply circuit, wherein the first node represents the connection point between the second carrier communication circuit and the power line.

[0037] Thirdly, embodiments of this disclosure provide a charging system, including:

[0038] Power supply equipment, including power output ports and data ports;

[0039] A power receiving device includes a charging circuit and a first carrier communication circuit. The charging circuit includes a power input terminal and a power output terminal. The power input terminal is connected to a first charging terminal, and the power output terminal is connected to the battery and control circuit of the power receiving device. The first carrier communication circuit includes a first port and a second port. The first port is connected to a power line between the charging circuit and the first charging terminal, and the second port is connected to the control circuit. The first carrier communication circuit is configured to: receive a data signal sent by the control circuit and modulate the data signal onto the power line; and / or demodulate the data signal on the power line and send the data signal to the control circuit.

[0040] A bridging device includes a power supply circuit and a second carrier communication circuit. The input terminal of the power supply circuit is connected to the power output port, and the output terminal is connected to the second charging terminal of the charging device. The second carrier communication circuit includes a third port and a fourth port. The third port is connected to the power line between the power supply circuit and the second charging terminal, and the fourth port is connected to the data port. The second carrier communication circuit is configured to: receive a data signal sent by the power supply device and modulate the data signal onto the power line; and / or demodulate the data signal on the power line and send the data signal to the power supply device.

[0041] In some embodiments, the power supply device includes a computer or power adapter, the power receiving device includes a wearable device, the bridging device includes a charging dock, the wearable device and the charging dock are magnetically connected, and after the two are magnetically connected, the first charging terminal on the wearable device and the second charging terminal on the charging dock are electrically connected.

[0042] The wearable device disclosed herein includes a charging circuit and a first carrier communication circuit. The charging circuit is connected to a first charging terminal, a battery, and a control circuit. The first port of the first carrier communication circuit is connected to a power line, and the second port is connected to the control circuit. In this embodiment, data signals are transmitted to the power line via carrier communication, thus eliminating the need to change the external structure of the wearable device. For example, no additional pins or data interfaces are required. This allows for wired data communication between the wearable device and other external devices at a lower cost, expanding the application scenarios and functions of the wearable device. For example, it enables wired data interaction between the wearable device and a PC, or interaction with a power adapter's fast charging protocol to achieve fast charging connectivity. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the specific embodiments of this disclosure or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of the charging system in some embodiments of this disclosure.

[0045] Figure 2 This is a charging circuit diagram for wearable devices in related technologies.

[0046] Figure 3 This is a circuit diagram of a charging system in some embodiments of this disclosure.

[0047] Figure 4 This is a circuit diagram of the charging system in some other embodiments of this disclosure.

[0048] Figure 5 This is a circuit diagram of the charging system in some other embodiments of this disclosure.

[0049] Figure 6 This is a circuit diagram of the charging system in some other embodiments of this disclosure.

[0050] Figure 7 This is a circuit diagram of the charging system in some other embodiments of this disclosure.

[0051] Figure 8 This is a circuit diagram of the charging system in some other embodiments of this disclosure.

[0052] Figure 9 This is a structural block diagram of a wearable device in some other embodiments of this disclosure. Detailed Implementation

[0053] The technical solutions of this disclosure will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure. Furthermore, the technical features involved in the different embodiments of this disclosure described below can be combined with each other as long as they do not conflict with each other.

[0054] With the development of electronic devices, wearable devices have shown great market potential. Smartwatches, smart bracelets, and TWS (True Wireless Stereo) earphones have become the most commonly used wearable devices in people's daily lives.

[0055] Currently, the wired charging method for wearable devices mainly involves an adapter connecting to a base, and the base connecting to the device. In other words, the wearable device has metal pins for charging. When the base is connected to the wearable device, the metal pins contact the pins on the base to establish an electrical connection.

[0056] For example Figure 1As shown, taking a smartwatch as an example, the back of the watch typically has two metal pins, and the charging dock has two corresponding pins. After the watch is connected to the charging dock, the pins on the back of the watch contact the metal pins on the charging dock, thus achieving a wired charging connection. However, this method can only achieve wired charging of wearable devices and cannot achieve wired data communication between wearable devices and other devices, thereby limiting the application scenarios of wearable devices in some scenarios.

[0057] For example, in a scenario where a smartwatch cannot communicate wirelessly with a mobile phone, if a wired communication connection can be established between the watch and a PC (Personal Computer) or mobile phone, then data communication and interaction can be performed with the watch via wired communication.

[0058] For example, in another scenario, if a wired communication connection can be established between the watch and the power adapter during the watch charging process, then the watch can interact with the adapter using the fast charging protocol to achieve fast charging.

[0059] However, as mentioned above, since wearable devices only include pins for charging, external devices cannot establish wired data communication with wearable devices, making the above scenario impossible and limiting the application of wearable devices.

[0060] For example Figure 2 A schematic diagram of a wired charging circuit between a wearable device, a charging dock, and a power supply terminal in related technologies is shown. Figure 2 In the example, the power supply can be any device capable of providing power output; for example, the power supply could be... Figure 1 The power adapter and PC are shown. The power supply provides power output through the power output interface. The power output is connected to the charging dock via the power bus (Vbus). The charging dock typically contains simple protection circuits, such as voltage protection circuit (OVP) and current protection circuit (OCP). The charging dock then transmits power to the wearable device through the contact connection between pins. The charging circuit in the wearable device processes the output current through processes such as voltage reduction, voltage regulation, current adjustment, and filtering before supplying power to the battery and system load (Vsys).

[0061] pass Figure 2 As the example shows, there are only two pins that make contact between the charging dock and the wearable device to form a charging circuit. Due to the lack of a data communication signal line, the wearable device cannot communicate with the power supply.

[0062] To address the aforementioned issues, an easy-to-think solution is to add a data interface to the wearable device. For example, a USB (Universal Serial Bus) interface could be added, such as a USB-A, Type-C, or MicroUSB interface. However, this approach not only increases the device's hardware cost and sacrifices its dust and water resistance, but also presents a challenge due to space constraints for small devices.

[0063] Another solution is to add pins to the wearable device. For example, in another example, two pins could be added to the wearable device as signal lines for data communication. This approach also requires changes to the original device design, increasing hardware costs and posing challenges to product design. More importantly, the added pins have limited functionality. For instance, in fast charging scenarios, different fast charging protocols use different data ports. For example, the QC protocol uses D+ / D- signal lines, while the PD protocol uses CC1 / CC2 signal lines. Therefore, even with two additional pins, only partial fast charging protocol interaction can be achieved, and multiple fast charging protocols cannot be compatible. Thus, this solution is also not feasible.

[0064] Based on this, the present disclosure provides a wearable device, a charging device, and a charging system, which aim to use carrier communication technology to modulate data signals onto power lines and achieve data communication using the existing charging circuit without adding pins, interfaces, or other hardware structures.

[0065] Figure 3 The following diagram illustrates the circuit structure of the charging system in some embodiments of this disclosure. Figure 3 The embodiments of this disclosure will be described.

[0066] like Figure 3 As shown, the charging system includes a power supply device, a bridging device, and a power receiving device. In this embodiment, the power supply device refers to an electronic device capable of providing power and data signal output, such as... Figure 1 In the example, the power supply device can be a power adapter, which not only provides power output but also facilitates fast charging protocol interaction. The fast charging protocol interaction process is essentially a data signal transmission and interaction process. As another example, the power supply device can be a PC, which not only provides power output but also facilitates data interaction. Of course, those skilled in the art will understand that the power supply device is not limited to... Figure 1 Examples could also be any other suitable device type, such as smartphones, tablets, etc., and this disclosure is not limited thereto.

[0067] A powered device refers to an electronic device that requires charging and data communication. In some embodiments of this disclosure, the powered device can be a wearable device, such as a smartphone, smart bracelet, or TWS earphone. These devices share some common characteristics, such as small size, lacking space for standard data interfaces, and high requirements for dust and water resistance, resulting in few or no openings on their exterior. When wired charging the powered device, a dedicated charging device (such as a charging dock or charging case) is generally required. Electrical connection is achieved by the pins on the charging device contacting the pins on the powered device.

[0068] Bridging devices are electronic devices used to form an electrical connection with a power receiving device, such as the charging devices mentioned above (e.g., charging docks, charging cases, etc.). Bridging devices are generally sold and used in conjunction with the power receiving device. The bridging device has pins that mate with the pins of the power receiving device. The bridging device and the power receiving device can be detachably connected by magnetic attraction, snap-fit, slots, etc. When the bridging device and the power receiving device are assembled and connected, the pins on the bridging device contact the pins on the power receiving device to establish an electrical connection, thereby enabling power supply to the power receiving device.

[0069] In a typical example scenario, the power supply device could be a power adapter, the powered device could be a smartwatch, and the bridging device could be a charging dock, for example. Figure 1 As shown, the smartwatch is connected to the charging dock, which is connected to the power adapter via a USB plug. The power adapter is then plugged into an external power source to establish a complete wired charging link.

[0070] In another example scenario, the power supply device could be a PC, the powered device could be a smartwatch, and the bridging device could be a charging dock, for example... Figure 1 As shown, the smartwatch is connected to the charging dock, which is connected to the PC via a USB plug, establishing a complete wired charging link.

[0071] In another example scenario, the power supply device can be a PC, the powered device can be TWS earphones or smart glasses, and the bridging device can be a charging case. The TWS earphones or smart glasses are placed in the charging case and connected to it. The charging case is connected to the PC via a USB plug, establishing a complete wired charging link.

[0072] Of course, those skilled in the art will understand that the charging system of the present disclosure is not limited to the above examples, and the power supply equipment, the power receiving equipment and the bridging equipment can be any other suitable equipment type, which will not be described in detail here.

[0073] Meanwhile, for ease of understanding and explanation, in the following embodiments of this disclosure, the power receiving device is uniformly referred to as a wearable device and the bridging device is uniformly referred to as a charging device. However, it is understood that the device types of the power receiving device and the bridging device are not limited to these.

[0074] See Figure 3 As shown in the present invention, a carrier communication circuit is provided in the wearable device and the charging device, namely a first carrier communication circuit located at the wearable device end and a second carrier communication circuit located at the charging device end.

[0075] A carrier wave is a high-frequency signal that does not contain information itself. However, information can be modulated by changing its frequency, amplitude, and phase. The process of loading data signals onto a carrier wave is called "modulation." Conversely, at the receiving end, the data signal carried by the carrier wave can be recovered to obtain the original information; this process is called "demodulation." In short, a carrier wave is a medium used to transmit information. Data signals can be modulated onto a high-frequency carrier wave for transmission, and the receiving end can obtain the original data signal through demodulation.

[0076] In this embodiment, considering that the wearable device has only two pins connected to the power line (Vbus), and that data signals are typically low-frequency and cannot be transmitted on the Vbus power line, this embodiment modulates the data signal to be transmitted onto a high-frequency carrier wave, and then performs carrier communication via the Vbus power line. Since the carrier signal has a high frequency, signal communication can be achieved on the Vbus power line. At the receiving end, the original data signal can be obtained through carrier demodulation, thus enabling data signal interaction communication on the Vbus power line.

[0077] See Figure 3 As shown, the wearable device (i.e., the power receiving device) includes a charging circuit, a control circuit, a first carrier communication circuit, and a battery.

[0078] A battery is an energy storage device for wearable devices. The process of charging a wearable device is the process of charging a battery.

[0079] The control circuit refers to the main control circuit in a wearable device. For example, the control circuit can be a SoC (System on Chip), MCU (Microcontroller Unit), or CPU (Central Processing Unit) chip. The control circuit enables various functional controls of the wearable device. In this embodiment, it mainly involves the control circuit's control of the charging circuit and the data interaction between the control circuit and the first carrier communication circuit; other functions are not described in detail.

[0080] A charging circuit refers to the circuitry in a wearable device used to manage charging and discharging as well as battery-related functions. Examples of charging circuits include a PMIC (Power Management IC), voltage conversion circuits (such as Buck converters), and charge pump circuits. During the charging process of an electronic device, the charging circuit can both charge the battery and supply power to the system load, i.e., provide Vsys power to the system's electronic components.

[0081] The first carrier communication circuit includes two functions: first, it modulates the data signal sent by the control circuit onto the power line Vbus, thereby transmitting the data signal through the power line Vbus; second, it demodulates the data signal modulated onto the power line Vbus by the external device, thereby sending the data signal to the control circuit, thus realizing interactive communication of data signals on the power line Vbus. The specific circuit structure of the first carrier communication circuit will be described in the following embodiments of this disclosure; here, only the circuit functions will be described.

[0082] In this embodiment of the disclosure, the wearable device includes a first charging terminal, which is also known as... Figure 3 The two pins shown are used as follows: one pin is connected to the charging circuit via a wire as the Vbus power line, and the other pin is grounded (GND) to form a charging loop. The charging circuit connects the battery and the control circuit; that is, as mentioned above, the charging circuit charges the battery on one hand and supplies power to the control circuit on the other.

[0083] The first carrier communication circuit includes a first port and a second port. Both the first port and the second port have signal input and output functions. The first port is connected to the Vbus power line between the pin point and the charging circuit, and the second port is connected to the control circuit.

[0084] It should be noted that, for ease of understanding and explanation, power lines in the accompanying drawings are uniformly represented by solid black lines, and signal lines for data communication are represented by solid red lines.

[0085] exist Figure 3 In the example, the first port of the first carrier communication circuit is connected to the Vbus power line, and the second port is connected to the control circuit. The first carrier communication circuit can receive data signals sent by the control circuit, then modulate the data signals onto the Vbus power line via carrier modulation, and transmit the data signals via a high-frequency carrier. Simultaneously, the first carrier communication circuit can capture high-frequency carrier signals from the Vbus power line, then demodulate them to obtain data signals, and send these data signals to the control circuit, thus realizing the transmission and reception of data signals.

[0086] In this embodiment of the disclosure, at the charging device (i.e., bridging device) end, the circuit structure of the charging device includes a power supply circuit and a second carrier communication circuit.

[0087] A power supply circuit refers to the internal circuitry of a charging device used to transmit power current. For example, in one embodiment, the power supply circuit may include an off-voltage protection circuit (OVP), which disconnects or limits the power supply when the circuit voltage exceeds a threshold, thereby preventing damage to the appliance due to excessive voltage. In another embodiment, the power supply circuit may include an overcurrent protection circuit (OCP), which disconnects or limits the power supply when the circuit current exceeds a threshold, thereby preventing damage to the appliance due to excessive current. The specific circuit structures and principles of OVP and OCP protection circuits can be understood and fully implemented by those skilled in the art by referring to relevant technologies, and will not be elaborated upon here.

[0088] The input terminal of the power supply circuit can be connected to the power output port of the power supply equipment via a Vbus power cable, while the output terminal is connected to the second charging terminal. The second charging terminal refers to... Figure 3 The charging device shown has two pins. One pin is connected to the output terminal of the power supply circuit, and the other pin is grounded (GND). When the charging device and the wearable device are connected together, the two pins on the charging device and the two pins on the wearable device make contact to form a charging circuit.

[0089] The second carrier communication circuit includes a third port and a fourth port, both of which have signal input and output functions. The third port connects to the Vbus power line between the power supply circuit and the pin, while the fourth port connects to the data port of the power supply device. The second carrier communication circuit can receive data signals sent by the power supply device through its data port, then modulate these signals onto the Vbus power line using carrier modulation, and finally transmit the data to the wearable device via a high-frequency carrier wave. Simultaneously, the second carrier communication circuit can capture high-frequency carrier signals sent by the wearable device from the Vbus power line, demodulate them to obtain data signals, and send these data signals to the data port of the power supply device, thus achieving data signal relay.

[0090] For the power supply device, the power supply device includes a power output port and a data port. In some embodiments, the power output port and the data port can be different pins integrated in the same data interface. For example, the power supply device can be equipped with data interfaces such as USB-A and Type-C. These data interfaces include many pins, such as the Vbus pin for power supply, and the D+ / D- pins, CC1 / CC2 pins, etc., for data communication. In the example of this disclosure, the power output port can be the Vbus pin of the data interface, and the data port can be the D+ / D- and / or CC1 / CC2 pins of the data interface, etc. Of course, those skilled in the art will understand that for other types of data interfaces, the data port can also be other pins, as long as they can be used to transmit data. This disclosure does not limit this.

[0091] As can be seen from the above, in this embodiment of the present disclosure, there is no need to change the appearance and structure of the wearable device and the charging device. On the basis of maintaining the original two-pin structure, only through circuit-level improvements, using the charging device as a bridge, carrier communication between the wearable device and the power supply device can be realized, and interactive transmission of data signals can be achieved.

[0092] Since wearable devices still have a two-pin structure, there is no need to change the original appearance of the wearable device or add additional interfaces, and the sealing performance of the device will not be affected. At the same time, the appearance of the charging device does not require additional modifications, so it can be manufactured using existing molds, which greatly reduces the deployment cost of the solution.

[0093] In some implementations, on the charging device side, considering that the data transmission protocol of the second carrier communication circuit may be different from the data port protocol of the power supply device, the second carrier communication circuit cannot directly process the data signal sent by the data port of the power supply device. Therefore, a protocol communication circuit and a microprocessor chip circuit can be added between the second carrier communication circuit and the data port to identify and convert the data signal.

[0094] For example Figure 4 In this example, the power supply device is a PC, and the bridging device is a charging device for the wearable device, such as a charging dock. The PC has a USB port, and the charging device connects to the PC's USB port via a USB plug. The charging device's power supply circuit is connected to the power output port (i.e., the Vbus port) of the PC's USB port via a Vbus power cable. The port on the PC used for data communication is the USB protocol port within the USB interface, used to transmit data signals conforming to the USB protocol standard.

[0095] In this example, on the charging device side, the protocol communication circuit is a USB protocol chip, and the microprocessor chip circuit can be an MCU chip. The USB protocol chip connects to the USB protocol port on the PC side, thereby receiving and recognizing the data signals sent by the USB protocol port, and then sending the data signals to the microprocessor chip circuit. The function of the microprocessor chip circuit is to process the data signals and send them to the second carrier communication circuit, which then modulates the data signals onto the Vbus power line. Similarly, the second carrier communication circuit can also decouple and demodulate the carrier signal on the Vbus power line to obtain the data signal. Then, the microprocessor chip circuit sends the demodulated data signal from the second carrier communication circuit to the USB protocol chip, which converts the data signals into signals conforming to the USB protocol standard and sends them to the PC side.

[0096] For example Figure 5 In this example, the power supply device is a power adapter, and the bridging device is a charging device for the wearable device, such as a charging dock. The power adapter has a USB port, and the charging device connects to this USB port via a USB plug. The charging device's power supply circuit is connected to the power output port (Vbus port) of the USB port on the power adapter via a Vbus power cable. The power adapter contains a fast charging protocol chip, which connects to the fast charging protocol port on the USB port. This fast charging protocol port is used to transmit data signals compliant with the fast charging protocol standard.

[0097] In this example, on the charging device side, the protocol communication circuit is a fast charging protocol chip, and the microprocessor chip circuit can be an MCU chip. The fast charging protocol chip connects to the fast charging protocol port on the power adapter side, thereby receiving and recognizing the fast charging protocol data sent by the fast charging protocol port. It then sends the fast charging protocol data to the microprocessor chip circuit, which processes the data and sends it to the second carrier communication circuit. The second carrier communication circuit then modulates the data onto the Vbus power line. Similarly, the second carrier communication circuit can decouple and demodulate the carrier signal on the Vbus power line to obtain fast charging protocol data. The microprocessor chip circuit then sends the demodulated data from the second carrier communication circuit to the fast charging protocol chip. The fast charging protocol chip converts the data into data conforming to the fast charging protocol standard and sends it to the power adapter side, realizing fast charging protocol interaction.

[0098] Figure 6 and Figure 7 The circuit structures of the first carrier communication circuit and the second carrier communication circuit in some embodiments of this disclosure are shown below. Figure 6 and Figure 7 The circuit structure and principle of this carrier communication circuit are explained.

[0099] like Figure 6 As shown, the first carrier communication circuit and the second carrier communication circuit have the same circuit structure. The following description will only take the first carrier communication circuit as an example. The first carrier communication circuit includes a coupling circuit, a signal driving circuit and a signal demodulation circuit.

[0100] The coupling circuit connects to the Vbus power line, and its function is to modulate the high-frequency carrier signal onto the Vbus power line or decouple the high-frequency carrier signal on the Vbus power line. The signal driving circuit and the signal demodulation circuit are connected in parallel to the coupling circuit. The signal driving circuit and the signal demodulation circuit have opposite functions: the signal driving circuit drives the coupling circuit to modulate the data signal onto the Vbus power line, and the signal demodulation circuit demodulates the decoupled carrier signal to obtain the original data signal. In the first carrier communication circuit, the signal driving circuit and the signal demodulation circuit are connected to the control circuit; in the second carrier communication circuit, the signal driving circuit and the signal demodulation circuit are connected to the microprocessor chip circuit.

[0101] See Figure 6As shown, taking the wearable device as the transmitter and the charging device as the receiver as an example, the control circuit generates a data signal and sends it to the signal driving circuit of the first carrier communication circuit. The signal driving circuit generates a high-frequency carrier signal based on the data signal, and then modulates the carrier signal containing the data signal onto the Vbus power line through a coupling circuit. Afterwards, the carrier signal reaches the charging device. The coupling circuit of the second carrier communication circuit of the charging device decouples the carrier signal on the Vbus power line, and then obtains the original data signal through a signal demodulation circuit. The microprocessor chip circuit sends the data signal to the aforementioned protocol communication circuit, and finally to the power supply device. Similarly, when the charging device is the transmitter and the wearable device is the receiver, the communication principle of its data signal is the same as described above, and will not be repeated here.

[0102] Figure 7 A schematic diagram of the circuit structure of the first carrier communication circuit and the second carrier communication circuit is shown. In this embodiment, the circuit structure of the first carrier communication circuit and the second carrier communication circuit is the same. Therefore, the following description will only take the first carrier communication circuit as an example.

[0103] See Figure 7 As shown in the example, the connection node between the first carrier communication circuit and the Vbus power line is defined as the first node A, and the connection node between the second carrier communication circuit and the Vbus power line is defined as the second node B.

[0104] In the first carrier communication circuit, the coupling circuit includes a first capacitor C1 and a first inductor L1 connected in series. One terminal of the first capacitor C1 is connected to the first node A, and the other terminal is connected to the first inductor L1. The first inductor L1 is connected to the signal driving circuit and the signal demodulation circuit.

[0105] The signal driving circuit includes a first transistor Q1, a second transistor Q2, and a second inductor L2. In this embodiment, the first transistor Q1 and the second transistor Q2 can be, for example, transistors or MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors), and this disclosure does not limit this.

[0106] Taking a MOSFET as an example, a MOSFET has three terminals: gate (G), source (S), and drain (D). The basic working principle of a MOSFET is that by applying a control level to the gate (G), the source (S) and drain (D) are turned on or off. MOSFETs can be divided into NMOS and PMOS, and according to different control levels, they can be divided into enhancement-mode and depletion-mode. In the embodiments of this disclosure, there are no restrictions on the type of MOSFET, and all types can implement the solution of this disclosure.

[0107] In this example, one end of the second inductor L2 is connected to the control circuit, and the other end is connected to the gate G of the first transistor Q1 and the second transistor Q2 respectively. The source S of the first transistor Q1 is connected to the high level Vcc, and the source S of the second transistor Q2 is connected to the low level, for example, the source S of the second transistor Q2 is grounded (GND). The drain D of the first transistor Q1 and the second transistor Q2 is connected to the first inductor L1.

[0108] In this embodiment of the disclosure, during carrier signal modulation, the control circuit controls the on / off state of the first transistor Q1 and the second transistor Q2 according to the data signal, thereby switching between high and low levels and continuously charging and discharging the first capacitor C1 and the first inductor L1 of the coupling circuit. This achieves modulation of the high-frequency carrier signal on the Vbus power line, realizing the modulation process of the data signal onto the Vbus power line. For example, when the control circuit controls the first transistor Q1 to be turned on and the second transistor Q2 to be turned off, the signal driving circuit outputs a high level to charge the coupling circuit, and the corresponding carrier signal is a high-level signal. When the control circuit controls the first transistor Q1 to be turned off and the second transistor Q2 to be turned on, the signal driving circuit outputs a low level, the coupling circuit discharges, and the corresponding carrier signal is a low-level signal, thus realizing the modulation of the carrier signal.

[0109] The signal demodulation circuit includes a follower circuit, a comparator circuit, and a digital signal processing circuit. The follower circuit is connected to the coupling circuit, the comparator circuit is connected to the follower circuit, the digital signal processing circuit is connected to the comparator circuit, and the control circuit is connected to the digital signal processing circuit. The follower circuit isolates the transmitted and received data signals. The comparator circuit performs high-to-low level conversion on the decoupled data signals, converting the level signal into a digital signal. The digital signal processing circuit then processes the converted digital signal before sending it to the control circuit.

[0110] As can be seen from the above process, both the wearable device and the charging device can act as both data transmitters and receivers, thus achieving bidirectional data communication. The circuit structure and carrier modulation and demodulation principles of the second carrier communication circuit on the charging device side are the same as those described for the first carrier communication circuit, and will not be repeated here.

[0111] It is understandable that, since the carrier signal is a high-frequency signal, it is not significantly affected by power line signal interference when transmitting communication via the Vbus power line, thus meeting communication requirements. However, in some implementations, to further reduce the interference of the Vbus power line on the carrier signal, an isolation inductor can be installed on the Vbus power line.

[0112] For example Figure 7As shown, on the wearable device side, a first isolation inductor L can be set on the Vbus power line between the first node A and the charging circuit. g1 Meanwhile, at the charging device end, a second isolation inductor L can be installed on the Vbus power line between the second node B and the power supply circuit. g2 Among them, the first isolation inductor L g1 Second isolation inductor L g2 Its function is to isolate high-frequency carrier signals and ensure that the carrier signals are not interfered with by the signals of the front-end and back-end power supply systems.

[0113] For example Figure 7 As shown, on the Vbus power line, the transmission path of the carrier signal is between the first node A and the second node B. In this example, by using two isolation inductors to isolate the two ends of the power line between the first node A and the second node B, the power supply system signals at both ends can be prevented from being transmitted to the power line between the first node A and the second node B, thereby reducing the interference of the power supply system on the carrier signal and improving the stability and accuracy of the carrier signal transmission.

[0114] Combination Figure 4 In the scenario shown, this embodiment of the disclosure allows for wired data communication between the wearable device and the PC via carrier communication without altering the original appearance and structure of the wearable device. For example, in one scenario, this embodiment of the disclosure can be used to establish wired data communication between a smartwatch and a PC, allowing the PC to read data such as pictures, schedules, and activity from the smartwatch, and also to transmit firmware, audio, text, and other data to the smartwatch via the PC.

[0115] Combination Figure 5 In the scenario shown, this embodiment of the disclosure allows for the use of the two existing pins on the wearable device to establish a fast charging connection with the power adapter, thereby achieving rapid charging and improving the charging speed of the wearable device. The following example illustrates this. Figure 5 Using a specific scenario as an example, we will explain the process of achieving fast charging for wearable devices.

[0116] Combination Figure 2As can be understood, in related technologies, because wearable devices and power adapters cannot establish a communication connection, the power adapters can only provide charging functions in a fixed mode. For example, taking smartwatches as an example, due to the size and heat dissipation limitations of the watch, the current industry standard for charging smartwatches is mostly 1C or 2C charging, which is relatively slow. Here, C represents the nominal capacity of the battery, and 1C means the charging current equals the nominal capacity of the battery. For example, if the nominal capacity of the battery is 1000mAh, the 1C charging current is 1000mA. Similarly, 2C charging means the charging current is twice the nominal capacity of the battery, i.e., 2000mA. If the charging rate of the watch is further increased, such as to 3C or 4C, according to the heat generation formula, doubling the charging current will cause the heat generated during charging to increase exponentially, resulting in excessively high watch temperatures. Therefore, traditional wearable devices struggle to achieve fast charging.

[0117] In this embodiment, fast charging protocol communication between the wearable device and the power adapter can be established using carrier communication. Through fast charging protocol interaction, the wearable device requests current and voltage from the power adapter in real time according to its own charging progress, and fast charging of the wearable device is achieved using the fast charging protocol.

[0118] To facilitate understanding, the process of establishing a fast charging connection between the electronic device and the adapter is explained first: After the power adapter and the electronic device are connected, the power adapter first sends a fast charging protocol handshake signal to the electronic device. Upon receiving the handshake signal, if the electronic device also supports fast charging, it returns a response signal to the power adapter, and the fast charging protocol handshake is successful. Then, the power adapter sends the current and voltage parameters it supports to the electronic device. After receiving this, the electronic device sends a fast charging request message to the power adapter based on these parameters. The fast charging request message includes the current and voltage parameters requested by the electronic device. The power adapter then outputs power according to the current and voltage specified in the fast charging request message, and fast charging begins.

[0119] In this embodiment, data communication between the wearable device and the power adapter can be achieved using carrier communication, thereby enabling fast charging protocol interaction. Furthermore, to enable fast charging functionality in the wearable device, improvements to its charging circuitry are necessary. For example, in some embodiments, a charge pump (CP) circuit can be added to the charging circuit of the wearable device to facilitate the fast charging process.

[0120] For example Figure 8 As shown, in some embodiments, at the wearable device end, the charging circuit includes a buck converter circuit and a charge pump circuit connected in parallel. The buck converter circuit is the Buck circuit in the figure, and the charge pump circuit is the CP circuit in the figure.

[0121] A Buck circuit is a step-down converter circuit. Its basic principle is: by controlling the switching transistor to turn off, the input current charges the inductor when the switching transistor is closed, and the inductor powers the load when the switching transistor is open. By repeatedly controlling the switching transistor to turn off, the voltage drop of the output voltage is controlled by the charging and discharging of the inductor.

[0122] The charge pump circuit is a step-up / step-down circuit based on a charge pump structure. Its basic principle is: by controlling the switching transistor to turn off, the input current charges the capacitor when the switching transistor is closed, and the capacitor powers the load when the switching transistor is open. By repeatedly controlling the switching transistor to turn off, the voltage drop of the output voltage is controlled by charging and discharging the capacitor.

[0123] The voltage drop loss between the input and output terminals of the charge pump circuit is very small. Especially when the voltage difference between the input and output terminals is large, the output efficiency is equivalent to twice the voltage difference efficiency of the traditional Buck circuit. The theoretical output efficiency can reach more than 90%. Therefore, it is often used in the high current CC (constant current) charging stage of electronic devices, which greatly shortens the charging time.

[0124] Charge pumps are widely used in electronic devices such as mobile phones and tablets, but less so in small wearable devices. This is because when using charge pumps for high-current fast charging, electronic devices need to constantly interact with the adapter, requesting current and voltage to maintain a stable charging process. However, as mentioned earlier, traditional wearable devices cannot establish data communication with the power adapter, thus hindering fast charging data interaction. In this embodiment, however, power line communication between the wearable device and the power adapter can be achieved using the aforementioned carrier communication. This process will be described in detail below.

[0125] like Figure 8 As shown, in terms of circuit structure, the charging circuit of a wearable device includes a Buck circuit and a CP circuit (i.e., a charge pump circuit). The Buck circuit and the CP circuit are connected in parallel, meaning that the power input terminals of both the Buck circuit and the CP circuit are connected to the pin points of the wearable device, and their power output terminals are connected to the battery. The control circuit can control the on / off state of the Buck circuit and the CP circuit, thus allowing it to control whether the battery is charged using the CP circuit or the Buck circuit.

[0126] In terms of software strategy, after the power adapter, charging device and wearable device establish a charging connection, the power adapter outputs a basic charging voltage of 5V. After passing through the power supply circuit of the charging device, the power is supplied to the wearable device. Once the wearable device detects that it has entered the charging state, it can perform a fast charging protocol handshake with the power adapter.

[0127] Specifically, the power adapter sends a fast charging handshake signal to the fast charging protocol chip of the charging device through the fast charging protocol port. After receiving the fast charging handshake signal, the fast charging protocol chip of the charging device returns a response signal to the power adapter, thus successfully completing the fast charging protocol handshake between the power adapter and the charging device. This process is also called "protocol spoofing," which means that from the power adapter's perspective, the charging device returns a spoofed response signal to the power adapter, causing the power adapter to recognize the charging device as the electronic device that needs charging, and the fast charging protocol handshake between the two is successful.

[0128] Then, the power adapter can send charging parameters to the charging device, including the fast charging levels supported by the power adapter itself (such as power levels or current and voltage levels), thereby informing the other device which fast charging levels it supports.

[0129] In this embodiment, after receiving the charging parameters, the charging device needs to modulate the charging parameter data signal onto the Vbus power line and send it to the wearable device via a microprocessor chip circuit and a second carrier communication circuit. The specific data signal carrier modulation process is readily understood by those skilled in the art and will not be elaborated further here.

[0130] After receiving the carrier signal sent by the charging device, the wearable device demodulates the corresponding charging parameters through the first carrier communication circuit. Then, based on the fast charging protocol interaction process, the wearable device's control circuit generates a fast charging request signal according to the charging parameters and the current battery cell voltage. This fast charging request signal needs to carry the charging current and charging voltage to inform the power adapter to output power at the requested current and voltage.

[0131] In this embodiment of the disclosure, the current and voltage requested by the wearable device need to be determined in conjunction with the current cell voltage of the battery. For example, in one example, the system can monitor the battery cell voltage Vbat and cell current Ibat in real time, and then calculate the charging voltage Vbus and charging current Ibus included in the fast charging request signal based on the cell voltage, expressed as:

[0132] Vbus = 2 * Vbat + Icc * R

[0133] Ibus = Icc / 2 + 0.5

[0134] In the above formula, Vbat represents the current cell voltage of the battery, Icc represents the maximum current during the CC stage (its value can be predetermined according to specific scenario requirements), and R represents the impedance of the entire charging circuit. Therefore, using the above formula, the required charging voltage Vbus and charging current Ibus can be calculated in real time, thus obtaining the fast charging request signal.

[0135] Continue to refer to Figure 8 As shown, after the control circuit of the wearable device generates a fast charging request signal, it modulates the fast charging request signal onto the Vbus power line via the first carrier communication circuit and transmits it to the charging device. The modulation process of the carrier signal is readily understood by those skilled in the art and will not be elaborated upon here.

[0136] Then, the charging device uses the second carrier communication signal to demodulate the carrier signal on the Vbus power line to obtain the fast charging request signal, which is then sent to the power adapter via the fast charging protocol chip. After receiving the fast charging request information, the power adapter can control the power output according to the charging voltage Vbus and charging current Ibus in the fast charging request information.

[0137] Additionally, it's worth noting that on the wearable device side, during the fast charging process, the charge pump circuit (i.e., the CP circuit) can be controlled to conduct through the battery, thus utilizing the charge pump circuit to achieve high-current CC fast charging. It's understandable that because the loss of the charge pump circuit is very small, the heat generated by the wearable device during high-current fast charging remains within a controllable range, allowing for fast charging while meeting heat dissipation requirements.

[0138] As discussed above, when using a charge pump circuit for high-current CC charging, the wearable device and the power adapter need to continuously communicate via the fast charging protocol to ensure a stable CC phase. This is because, as fast charging progresses, the battery cell voltage Vbat gradually increases. With a constant charging power, the current Ibat entering the cell gradually decreases. To maintain a constant Ibat and ensure the constant current (CC) phase continues, the wearable device needs to continuously adjust the charging voltage Vbus requested from the power adapter.

[0139] Specifically, in terms of software strategy, the wearable device's system can monitor the battery's cell current Ibat in real time. When the cell current Ibat is lower than a preset threshold, it indicates a significant drop in Ibat, requiring a re-application of the charging voltage Vbus to raise the cell current Ibat. The preset threshold can be a pre-defined value or percentage. For example, in one scenario, assuming the specified cell current for the constant current (CC) stage is Ibat_0, the preset threshold could be 90% * Ibat_0.

[0140] In one example implementation, when the cell current Ibat is detected to be less than a preset threshold, a preset voltage increment ΔV can be added to the previously applied charging voltage Vbus. That is, the i-th applied charging voltage Vbus_i = (Vbus_i-1) + ΔV. After reapplying for the charging voltage according to the above method, the cell current Ibat is monitored again. If the cell current Ibat is still less than the preset threshold, the preset voltage increment ΔV is added to the previously applied charging voltage Vbus. This process is repeated until the cell current Ibat rises to or above the preset threshold, at which point the current increase process stops.

[0141] It is understandable that as high-current CC fast charging proceeds, the battery cell voltage Vbat gradually increases. When the cell voltage Vbat reaches the charging cutoff voltage, it means that the cell voltage Vbat cannot continue to rise. In actual scenarios, the battery capacity is also charged to a relatively high level at this time, and it is necessary to enter the constant voltage (CV) stage to reduce the cell current Ibat.

[0142] At this point, the wearable device's control circuit can re-request charging current and voltage from the power adapter, following the aforementioned process, for example, by having the power adapter output a 5V Vbus voltage. Furthermore, the control circuit disconnects the CP power supply and instead uses a low-power Buck current to charge the battery at a constant voltage until the battery is fully charged, thus interrupting the entire charging process.

[0143] As described above, in this embodiment, carrier communication enables fast charging protocol interaction between the wearable device and the power adapter, thereby achieving fast charging of the wearable device and improving its charging rate. Furthermore, during charging, the wearable device can request appropriate current and voltage from the power adapter in real time based on its charging status, achieving complete fast charging functionality and improving charging efficiency.

[0144] Figure 9 The structure of a wearable device according to some embodiments of this disclosure is shown below, in conjunction with... Figure 9 Wearable devices according to some embodiments of this disclosure will be described.

[0145] Reference Figure 9 The wearable device 1800 may include one or more of the following components: a processing component 1802, a memory 1804, a power supply component 1806, a multimedia component 1808, an audio component 1810, an input / output (I / O) interface 1812, a sensor component 1816, and a communication component 1818.

[0146] Processing component 1802 typically controls the overall operation of device 1800, such as operations associated with display, telephone calls, data communication, camera operation, and recording operations. Processing component 1802 may include one or more processors 1820 to execute instructions. Furthermore, processing component 1802 may include one or more modules to facilitate interaction between processing component 1802 and other components. For example, processing component 1802 may include a multimedia module to facilitate interaction between multimedia component 1808 and processing component 1802. As another example, processing component 1802 may read executable instructions from memory to implement relevant functions of the electronic device.

[0147] Memory 1804 is configured to store various types of data to support the operation of device 1800. Examples of this data include instructions for any application or method operating on electronic device 1800, contact data, phonebook data, messages, pictures, videos, etc. Memory 1804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0148] Power supply component 1806 provides power to various components of device 1800. Power supply component 1806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to device 1800.

[0149] The multimedia component 1808 includes a display screen that provides an output interface between the device 1800 and the user. In some embodiments, the multimedia component 1808 includes a front-facing camera and / or a rear-facing camera. When the device 1800 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera can receive external multimedia data. Each front-facing camera and rear-facing camera can be a fixed optical lens system or have focal length and optical zoom capabilities.

[0150] Audio component 1810 is configured to output and / or input audio signals. For example, audio component 1810 includes a microphone (MIC) configured to receive external audio signals when device 1800 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 1804 or transmitted via communication component 1818. In some embodiments, audio component 1810 also includes a speaker for outputting audio signals.

[0151] I / O interface 1812 provides an interface between processing component 1802 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0152] Sensor assembly 1816 includes one or more sensors for providing status assessments of various aspects of device 1800. For example, sensor assembly 1816 may detect the on / off state of device 1800, the relative positioning of components such as the display and keypad of device 1800, changes in the position of device 1800 or a component of device 1800, the presence or absence of user contact with device 1800, the orientation or acceleration / deceleration of device 1800, and temperature changes of device 1800. Sensor assembly 1816 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 1816 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 1816 may also include an accelerometer, a gyroscope, a magnetometer, a pressure sensor, or a temperature sensor.

[0153] Communication component 1818 is configured to facilitate wired or wireless communication between device 1800 and other devices. Device 1800 can access wireless networks based on communication standards, such as Wi-Fi, 2G, 3G, 4G, 5G, or 6G, or combinations thereof. In one exemplary embodiment, communication component 1818 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 1818 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0154] In an exemplary embodiment, device 1800 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components.

[0155] Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the embodiments. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all embodiments here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this disclosure.

Claims

1. A wearable device, comprising: The charging circuit comprises a power input end and a power output end, the power input end is connected with the first charging terminal, and the power output end is connected with the battery and the control circuit. The first carrier communication circuit comprises a first port and a second port, the first port is connected with the power line between the charging circuit and the first charging terminal, and the second port is connected with the control circuit. The first carrier communication circuit is configured to: receive a data signal sent by the control circuit and modulate the data signal on the power line; and / or demodulate a data signal on the power line and send the data signal to the control circuit.

2. The wearable device of claim 1, wherein The charging circuit comprises a step-down conversion circuit and a charge pump circuit, the power input ends of the step-down conversion circuit and the charge pump circuit are connected with the first charging terminal, the power output end of the step-down conversion circuit is connected with the battery and the control circuit, and the power output end of the charge pump circuit is connected with the battery. The control circuit is configured to:

3. The wearable device of claim 2, wherein, receive a data signal demodulated by the first carrier communication circuit, the data signal comprising charging parameters supported by the power supply device; generate a fast charging request signal according to the charging parameters and the current cell voltage of the battery; modulate the fast charging request signal on the power line through the first carrier communication circuit and control the charging link between the charge pump circuit and the battery to be turned on. The control circuit is configured to:

4. The wearable device of claim 3, wherein, detect the cell voltage and the cell current of the battery during the charging process of the battery by the charge pump circuit; in response to the cell current being less than a preset threshold, gradually increase the request voltage included in the fast charging request signal by a preset voltage increment, and modulate the fast charging request signal on the power line through the first carrier communication circuit until the cell current is not less than the preset threshold. The control circuit is configured to:

5. The wearable device of claim 2, wherein, in response to the cell voltage of the battery reaching a preset voltage value, control the charging link between the step-down conversion circuit and the battery to be turned on; send a charging request signal to the first carrier communication circuit and modulate the charging request signal on the power line through the first carrier communication circuit.

6. The wearable device of any one of claims 1 to 5, wherein The first carrier communication circuit comprises a coupling circuit, a signal driving circuit and a signal demodulation circuit, one end of the coupling circuit is connected with the power line, and the other end is connected with the signal driving circuit and the signal demodulation circuit respectively, and the signal driving circuit and the signal demodulation circuit are connected with the control circuit.

7. The wearable device of claim 6, wherein The coupling circuit comprises a first capacitor and a first inductor connected in series. ​ The signal driving circuit comprises a first transistor, a second transistor and a second inductor, one end of the second inductor is connected to the control circuit, the other end is connected to the gate of the first transistor and the second transistor, the source of the first transistor is connected to a high level, the source of the second transistor is connected to a low level, and the drain of the first transistor and the drain of the second transistor are both connected to the coupling circuit. The signal demodulation circuit comprises a follower circuit, a comparator circuit and a digital signal processing circuit connected in series.

8. The wearable device of claim 5, wherein, Further comprising a first isolation inductor, the first isolation inductor is arranged between a first node and the power input end of the charging circuit, wherein the first node represents a connection point of the first carrier communication circuit and the power line.

9. A charging device, characterized by Comprise: A power supply circuit, the input end of the power supply circuit is used for connecting the power output port of the power supply device, and the output end is connected to the second charging terminal of the charging device; A second carrier communication circuit comprising a third port and a fourth port, the third port is connected to the power line between the power supply circuit and the second charging terminal, and the fourth port is used for connecting the data port of the power supply device; Wherein, the second carrier communication circuit is configured to: receive the data signal sent by the power supply device, and modulate the data signal onto the power line; and / or, demodulate the data signal on the power line, and send the data signal to the power supply device.

10. The charging device of claim 9, wherein, Further comprising a protocol communication circuit, the second carrier communication circuit connects the data port through the protocol communication circuit, and the protocol communication circuit is configured to: receive and process the data signal sent by the power supply device, and send the data signal to the second carrier communication circuit; and / or, receive and process the data signal demodulated by the second carrier communication circuit, and send the data signal to the power supply device.

11. The charging device of claim 10, wherein, Further comprising a micro-processing chip circuit, the second carrier communication circuit connects the protocol communication circuit through the micro-processing chip circuit, and the micro-processing chip circuit is configured to: control the modulation signal of the second carrier communication circuit according to the data signal sent by the protocol communication circuit; and / or, receive the data signal demodulated by the second carrier communication circuit and send it to the protocol communication circuit.

12. The charging device of claim 11, wherein, The second carrier communication circuit comprises a coupling circuit, a signal driving circuit and a signal demodulation circuit, one end of the coupling circuit is connected to the power line, the other end is connected to the signal driving circuit and the signal demodulation circuit respectively, and the signal driving circuit and the signal demodulation circuit are connected to the micro-processing chip circuit.

13. The charging device of claim 12, wherein, The coupling circuit comprises a first capacitor and a first inductor connected in series; The signal driving circuit comprises a first transistor, a second transistor and a second inductor, one end of the second inductor is connected to the micro processing chip circuit, the other end is connected to the gate of the first transistor and the second transistor, the source of the first transistor is connected to high level, the source of the second transistor is connected to low level, the drain of the first transistor and the second transistor are both connected to the coupling circuit. The signal demodulation circuit comprises a follower circuit, a comparator circuit and a digital signal processing circuit connected in series.

14. The charging device of claim 12, wherein Further comprising a second isolation inductor, the second isolation inductor is arranged between a second node and an output terminal of the power supply circuit, wherein the second node represents a connection point of the second carrier communication circuit and the power line.

15. A charging system, characterized by Comprise: A power supply device comprising a power output port and a data port; A powered device comprising a charging circuit and a first carrier communication circuit, the charging circuit comprising a power input terminal and a power output terminal, the power input terminal being connected to a first charging terminal, the power output terminal being connected to a battery and a control circuit of the powered device, the first carrier communication circuit comprising a first port and a second port, the first port being connected to a power line between the charging circuit and the first charging terminal, the second port being connected to the control circuit, wherein the first carrier communication circuit is configured to: receive a data signal sent by the control circuit and modulate the data signal onto the power line; and / or demodulate a data signal on the power line and send the data signal to the control circuit; A bridge device comprising a power supply circuit and a second carrier communication circuit, the input terminal of the power supply circuit being connected to the power output port, the output terminal being connected to a second charging terminal of the charging device, the second carrier communication circuit comprising a third port and a fourth port, the third port being connected to a power line between the power supply circuit and the second charging terminal, the fourth port being connected to the data port, wherein the second carrier communication circuit is configured to: receive a data signal sent by the power supply device and modulate the data signal onto the power line; and / or demodulate a data signal on the power line and send the data signal to the power supply device.

16. The charging system of claim 15, wherein The power supply device comprises a computer or a power adapter, the powered device comprises a wearable device, the bridge device comprises a charging base, the wearable device and the charging base are magnetically attractable, and after the two are magnetically attracted, the first charging terminal on the wearable device and the second charging terminal on the charging base establish electrical connection.

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