Charging interface detection device

Abstract

The utility model discloses a charging interface detection device, and relates to the technical field of charging monitoring, the charging interface detection device comprises a shell and a circuit board, two ends of the shell are respectively provided with a charging male head and a charging female seat, and pins of the charging male head comprise a VBUS end, a D + end and a D-end; the circuit board is arranged in the shell and comprises a power management module, a main control module, a detection module and an NFC radio frequency module, the input end of the power management module is connected with the VBUS end, and the output end of the power management module is connected with the main control module and the NFC radio frequency module; the input end of the detection module is connected with the VBUS end, the D + end, the D-end, the output end of the power management module and the load ground end of the charging female seat, the multiple output ends of the detection module are connected with the main control module, the output end of the main control module is connected with the NFC radio frequency module, and the NFC radio frequency module is used for converting detection data obtained by the detection module into radio frequency data and sending the radio frequency data. According to the invention, the convenience of data management can be improved.

Description

Technical Field

[0001] This application relates to the field of charging monitoring technology, and in particular to a charging interface detection device. Background Technology

[0002] In the current field of electronic device charging, the testing and diagnostics of charging interfaces are crucial for ensuring charging safety and efficiency. Traditional charging interface testing devices typically use wired connections, displaying key parameters such as voltage and current in real time on a built-in screen, allowing users or technicians to quickly determine the charging interface's operational status. However, existing charging interface testing devices rely on built-in displays, which have limited screen size and fixed positions, making them inconvenient for flexible viewing in various environments, especially in low light or when observation from a distance is required. Furthermore, while some testing devices support data logging, this data is usually stored internally, preventing users from directly accessing or exporting it, thus limiting further data analysis and utilization. Utility Model Content

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a charging interface detection device that can improve the convenience of data management.

[0004] This application provides a charging interface detection device, including:

[0005] The housing has a male charging connector and a female charging socket at its two ends. The male charging connector is used to connect to an external power adapter, and the female charging socket is used to connect to a charging load via a charging cable. The pins of the male charging connector and the pins of the female charging socket are connected in a one-to-one correspondence. The pins of the male charging connector include a VBUS terminal, a D+ terminal, and a D- terminal.

[0006] A circuit board is disposed within the housing. The circuit board includes a power management module, a main control module, a detection module, and an NFC radio frequency module. The input terminal of the power management module is connected to the VBUS terminal, and the output terminal of the power management module is connected to the main control module and the NFC radio frequency module. The input terminal of the detection module is connected to the VBUS terminal, the D+ terminal, the D- terminal, the output terminal of the power management module, and the load ground terminal of the charging female connector. The multiple output terminals of the detection module are connected to the main control module, and the output terminal of the main control module is connected to the NFC radio frequency module. The NFC radio frequency module is used to convert the detection data obtained by the detection module into radio frequency data and transmit it.

[0007] The charging interface detection device according to the embodiments of this application has at least the following beneficial effects: The male charging connector is connected to an external power adapter and receives electrical energy through the VBUS terminal. The power management module receives the electrical energy from the VBUS terminal and converts it into voltage and current suitable for the operation of the internal circuit to power the entire device. The detection module is connected to the VBUS terminal, D+ terminal, D- terminal, the output terminal of the power management module, and the load ground terminal of the female charging connector through its input terminal. It detects various parameters of the charging interface in real time, such as voltage, current, and data transmission status. The detection module converts the detected data into electrical signals and sends them to the main control module through multiple output terminals. The main control module receives the data from the detection module, processes and analyzes it, and sends the processed data to the NFC radio frequency module. The NFC radio frequency module converts the data into radio frequency signals for wireless transmission. Users can use NFC-enabled smartphones or other devices to wirelessly connect and transmit data by bringing them close to the NFC radio frequency module of the device. The data is converted into visualized charging data, such as voltage and current values, and displayed on the screen. Users can save, edit, or share this charging data on their smartphones as needed, achieving convenient data storage and management. In this application, users can view charging data without relying on the built-in display screen of the detection device, and can also connect to the NFC radio frequency module in the charging interface detection device through the NFC function of their smartphones to achieve convenient data storage and management, thus improving ease of use.

[0008] According to some embodiments of this application, the NFC radio frequency module includes a reader chip, a matching circuit, and a coil antenna. The input terminal of the reader chip is connected to the output terminal of the main control module. The first transmitting terminal and the second transmitting terminal of the reader chip are respectively connected to the first input terminal and the second input terminal of the matching circuit. The first output terminal and the second output terminal of the matching circuit are respectively connected to the two ends of the coil antenna.

[0009] According to some embodiments of this application, the matching circuit includes a first inductor, a second inductor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a first resistor, and a second resistor. The first transmitting end of the reader chip is connected to the first end of the coil antenna in sequence through the first inductor, the first capacitor, and the first resistor. The second transmitting end of the reader chip is connected to the second end of the coil antenna in sequence through the second inductor, the second capacitor, and the second resistor. One end of the third capacitor is connected between the first inductor and the first capacitor. One end of the fourth capacitor is connected between the second inductor and the second capacitor. The other end of the third capacitor is connected to the other end of the fourth capacitor. One end of the fifth capacitor is connected between the first capacitor and the first resistor. One end of the sixth capacitor is connected between the second capacitor and the second resistor. The other end of the fifth capacitor is connected to the other end of the sixth capacitor.

[0010] According to some embodiments of this application, the detection module includes a voltage detection module, a current detection module, a temperature detection module, and a fast charging protocol detection module. The input terminal of the voltage detection module is connected to the VBUS terminal, the input terminal of the current detection module is connected to the load ground terminal of the charging socket, the input terminal of the temperature detection module is connected to the output terminal of the power management module, the first and second input terminals of the fast charging protocol detection module are respectively connected to the D+ terminal and the D- terminal, and the output terminals of the voltage detection module, the current detection module, the temperature detection module, and the fast charging protocol detection module are respectively connected to the main control module.

[0011] According to some embodiments of this application, the voltage detection module includes a third resistor and a fourth resistor. One end of the third resistor is the input terminal of the voltage detection module, and the other end of the third resistor is grounded through the fourth resistor. The area between the third resistor and the fourth resistor is the output terminal of the voltage detection module.

[0012] According to some embodiments of this application, the current detection module includes a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a third capacitor, a fourth capacitor, a fifth capacitor, and a power amplifier. One end of the fifth resistor is connected to one end of the sixth resistor, and the area between the fifth and sixth resistors is the input terminal of the current detection module. The other end of the fifth resistor is grounded. The other end of the sixth resistor is connected to the non-inverting input terminal of the power amplifier. The sixth resistor and the non-inverting input terminal of the power amplifier are grounded through the third capacitor. The positive power supply terminal of the power amplifier is connected to the output terminal of the power management module. The positive power supply terminal of the power amplifier and the output terminal of the power management module are grounded through the fourth capacitor. The negative power supply terminal of the power amplifier is grounded. The output terminal of the power amplifier is grounded sequentially through the seventh resistor and the fifth capacitor. The area between the seventh resistor and the fifth capacitor is the output terminal of the current detection module. The inverting input terminal of the power amplifier is grounded through the eighth resistor. The output terminal of the power amplifier is connected to its inverting input terminal through the ninth resistor.

[0013] According to some embodiments of this application, the temperature detection module includes a tenth resistor and a thermistor. One end of the tenth resistor is the input terminal of the temperature detection module, and the other end of the tenth resistor is grounded through the thermistor. The area between the tenth resistor and the thermistor is the output terminal of the temperature detection module.

[0014] According to some embodiments of this application, the fast charging protocol detection module includes an eleventh resistor, a twelfth resistor, a thirteenth resistor, and a fourteenth resistor. One end of the eleventh resistor is connected to the D+ terminal and serves as the first input terminal of the fast charging protocol detection module. The other end of the eleventh resistor is grounded through the twelfth resistor. One end of the thirteenth resistor is connected to the D- terminal and serves as the second input terminal of the fast charging protocol detection module. The other end of the thirteenth resistor is grounded through the fourteenth resistor. The points between the eleventh and twelfth resistors, and between the thirteenth and fourteenth resistors, respectively serve as the two output terminals of the fast charging protocol detection module.

[0015] According to some embodiments of this application, a display module is provided on the surface of the housing. The power supply terminal of the display module is connected to the output terminal of the power management module, and the input terminal of the display module is connected to the output terminal of the main control module, for displaying detection data obtained from the detection module.

[0016] According to some embodiments of this application, a button module is further provided on the surface of the housing. One end of the button module is connected to the input terminal of the main control module and the output terminal of the power management module, respectively, and the other end of the button module is grounded, which is used to switch the display state of the display module.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] Additional aspects and advantages of this application will become apparent and readily understood in conjunction with the following description of the embodiments, in which:

[0019] Figure 1 This is a schematic diagram of the structure of a charging interface detection device provided in some embodiments of this application;

[0020] Figure 2 Circuit block diagram of a charging interface detection device provided in some embodiments of this application;

[0021] Figure 3 Circuit diagrams of the main control module provided for some embodiments of this application;

[0022] Figure 4 Circuit diagrams of male and female charging connectors provided for some embodiments of this application;

[0023] Figure 5 Circuit diagrams of NFC radio frequency modules provided in some embodiments of this application;

[0024] Figure 6 Circuit diagrams of voltage detection modules provided in some embodiments of this application;

[0025] Figure 7 Circuit diagrams of current detection modules provided in some embodiments of this application;

[0026] Figure 8 Circuit diagrams of temperature detection modules provided in some embodiments of this application;

[0027] Figure 9 Circuit diagrams of fast charging protocol detection modules provided in some embodiments of this application;

[0028] Figure 10 Circuit diagrams of button modules provided in some embodiments of this application;

[0029] Figure 11 Circuit diagrams of power management modules provided for some embodiments of this application.

[0030] The attached icons are numbered as follows:

[0031] Male charging connector 110; Female charging connector 120; Housing 130; Detection module 200; Power management module 300; Main control module 400; NFC radio frequency module 500; Display module 600; Button module 700. Detailed Implementation

[0032] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0033] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0034] In the description of this application, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0035] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0036] In the current field of electronic device charging, the testing and diagnostics of charging interfaces are crucial for ensuring charging safety and efficiency. Traditional charging interface testing devices typically use wired connections, displaying key parameters such as voltage and current in real time on a built-in screen, allowing users or technicians to quickly determine the charging interface's operational status. However, existing charging interface testing devices rely on built-in displays, which have limited screen size and fixed positions, making them inconvenient for flexible viewing in various environments, especially in low light or when observation from a distance is required. Furthermore, while some testing devices support data logging, this data is usually stored internally, preventing users from directly accessing or exporting it, thus limiting further data analysis and utilization.

[0037] Based on this, this application provides a charging interface detection device to solve the above-mentioned technical problems. The technical solutions provided by this application will be described in detail below.

[0038] Reference Figure 1 and Figure 2 This application provides a charging interface detection device, including: a housing 130 and a circuit board. The housing 130 has a male charging connector 110 and a female charging connector 120 at its two ends. The male charging connector 110 is used to connect to an external power adapter, and the female charging connector 120 is used to connect to a charging load via a charging cable. The pins of the male charging connector 110 and the female charging connector 120 are connected one-to-one. The pins of the male charging connector 110 include a VBUS terminal, a D+ terminal, and a D- terminal. The circuit board is disposed inside the housing 130 and includes a power management module 300, a main control module 400, a detection module 200, and an NFC radio frequency module 5. 00, the input terminal of the power management module 300 is connected to the VBUS terminal, and the output terminal of the power management module 300 is connected to the main control module 400 and the NFC radio frequency module 500 respectively. The input terminal of the detection module 200 is connected to the VBUS terminal, D+ terminal, D- terminal, the output terminal of the power management module 300, and the load ground terminal of the charging female connector 120 respectively. The multiple output terminals of the detection module 200 are connected to the main control module 400 respectively. The output terminal of the main control module 400 is connected to the NFC radio frequency module 500. The NFC radio frequency module 500 is used to convert the detection data obtained by the detection module 200 into radio frequency data and transmit it.

[0039] The male charging connector 110 connects to an external power adapter and receives power through the VBUS terminal. The power management module 300 receives the power from the VBUS terminal and converts it into voltage and current suitable for the internal circuitry to power the entire device. The detection module 200 connects to the VBUS terminal, D+ terminal, D- terminal, the output terminal of the power management module 300, and the load ground terminal of the female charging connector 120 through its input terminal. It monitors various parameters of the charging interface in real time, such as voltage, current, and data transmission status. The detection module 200 converts the detected data into electrical signals and sends them to the main control module 400 through multiple output terminals. The main control module 400 receives the data from the detection module 200, processes and analyzes it, and sends the processed data to the NFC radio frequency module 500. The NFC radio frequency module 500 converts this data into radio frequency signals for wireless transmission. Users can wirelessly connect and transmit data by bringing NFC-enabled smartphones or other devices close to the NFC radio frequency module 500 of the device. This data is then converted into visualized charging data, such as voltage and current values, and displayed on the screen. Users can save, edit, or share this charging data on their smartphones as needed, achieving convenient data storage and management. In this application, users do not need to rely on the built-in display screen of the detection device to view charging data, and can conveniently store and manage data by connecting their smartphones to the NFC radio frequency module 500 in the charging interface detection device via the NFC function, thus improving ease of use.

[0040] in, Figure 3 This application provides a circuit diagram of the main control module 400. The interface type of the male charging connector 110 and the female charging socket 120 in this application is Type-C. Figure 4 TYPEC-1 represents the circuit diagram at the male charging connector 110, and TYPEC-2 represents the circuit diagram at the female charging connector 120. Figure 11 The power management module 300 provided in this application is mainly composed of a voltage regulator chip, which can convert the VBUS voltage into a stable 3.3V voltage to provide the voltage and current for the internal circuits to operate and to power the entire device.

[0041] Reference Figure 5 It is understood that the NFC RF module 500 includes a reader chip U1, a matching circuit, and a coil antenna U3. The input terminal of the reader chip U1 is connected to the output terminal of the main control module 400. The first and second transmitting terminals of the reader chip U1 are connected to the first and second input terminals of the matching circuit, respectively. The first and second output terminals of the matching circuit are connected to the two ends of the coil antenna U3, respectively. As the core of the NFC RF module 500, the reader chip U1 is responsible for encoding the data sent by the main control module 400 into a signal suitable for NFC communication. The matching circuit is used to optimize the impedance matching between the reader chip U1 and the coil antenna U3, thereby maximizing signal transmission efficiency and power. The charging interface detection device equipped with the NFC RF module 500 can not only realize wireless data transmission and storage, but also interact with other NFC-enabled devices. When using the charging interface detection device equipped with the NFC RF module 500, users only need to bring NFC-enabled devices such as smartphones close to the device to complete data reading and transmission.

[0042] Continue to refer to Figure 5It is understood that the matching circuit includes a first inductor L1, a second inductor L2, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a first resistor R1, and a second resistor R2. The first transmitting end of the reader chip U1 is connected to the first end of the coil antenna U3 in sequence through the first inductor L1, the first capacitor C1, and the first resistor R1. The second transmitting end of the reader chip U1 is connected to the second end of the coil antenna U3 in sequence through the second inductor L2, the second capacitor C2, and the second resistor R2. One end of the third capacitor C3 is connected between the first inductor L1 and the first capacitor C1. One end of the fourth capacitor C4 is connected between the second inductor L2 and the second capacitor C2. The other end of the third capacitor C3 is connected to the other end of the fourth capacitor C4. One end of the fifth capacitor C5 is connected between the first capacitor C1 and the first resistor R1. One end of the sixth capacitor C6 is connected between the second capacitor C2 and the second resistor R2. The other end of the fifth capacitor C5 is connected to the other end of the sixth capacitor C6. In the circuit described above, the inductor and capacitor together form a resonant circuit, which helps adjust the resonant frequency of the antenna, enabling it to achieve optimal radiation efficiency at a specific frequency. The resistor, along with the capacitor and inductor, forms an impedance matching network, ensuring optimal impedance matching between the antenna and the reader chip U1, thus improving signal transmission efficiency and stability.

[0043] Reference Figure 2 It is understood that the detection module 200 includes a voltage detection module, a current detection module, a temperature detection module, and a fast charging protocol detection module. The input terminal of the voltage detection module is connected to the VBUS terminal, the input terminal of the current detection module is connected to the load ground terminal of the charging socket 120, the input terminal of the temperature detection module is connected to the output terminal of the power management module 300, the first input terminal and the second input terminal of the fast charging protocol detection module are connected to the D+ terminal and the D- terminal, respectively, and the output terminals of the voltage detection module, the current detection module, the temperature detection module, and the fast charging protocol detection module are connected to the main control module 400.

[0044] The voltage detection module monitors voltage changes in real time during charging, ensuring stable voltage that meets safety standards and preventing damage to the equipment from overvoltage or undervoltage. The current detection module monitors the charging current to prevent excessive current from causing overheating or short circuits, and also helps assess charging efficiency. The temperature detection module monitors the output temperature of the power management module 300 to promptly detect and prevent overheating during charging, thus avoiding safety hazards such as fires. The fast charging protocol detection module ensures fast charging protocol compatibility between the charging device and the charging interface, preventing low charging efficiency or equipment damage due to protocol incompatibility. The connection of these detection modules to the main control module 400 enables the system to intelligently analyze and process real-time monitored data, automatically adjusting charging strategies or issuing warning signals, further enhancing the system's intelligence level.

[0045] Reference Figure 6 It is understood that the voltage detection module includes a third resistor R3 and a fourth resistor R4. One end of the third resistor R3 is the input terminal of the voltage detection module, and the other end of the third resistor R3 is grounded through the fourth resistor R4. The output terminal of the voltage detection module is located between the third resistor R3 and the fourth resistor R4. The third resistor R3 and the fourth resistor R4 together form a voltage divider network, which divides the voltage to be measured to a lower voltage level suitable for subsequent circuit processing. The third resistor R3 can be 100kΩ, and the fourth resistor R4 can be 10kΩ; this application does not limit this, but the choice of resistance value will affect the voltage division ratio, and thus affect the accuracy and range of the measurement results.

[0046] Reference Figure 7 It can be understood that the current detection module includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, and a power amplifier U2. One end of the fifth resistor R5 is connected to one end of the sixth resistor R6, and the area between the fifth resistor R5 and the sixth resistor R6 is the input terminal of the current detection module. The other end of the fifth resistor R5 is grounded, and the other end of the sixth resistor R6 is connected to the non-inverting input terminal of the power amplifier U2. The sixth resistor R6 and the non-inverting input terminal of the power amplifier U2 are connected by the third capacitor C3. 3. Grounding: The positive power supply terminal of power amplifier U2 is connected to the output terminal of power management module 300. The positive power supply terminal of power amplifier U2 and the output terminal of power management module 300 are grounded through the fourth capacitor C4. The negative power supply terminal of power amplifier U2 is grounded. The output terminal of power amplifier U2 is grounded in sequence through the seventh resistor R7 and the fifth capacitor C5. The output terminal of current detection module is located between the seventh resistor R7 and the fifth capacitor C5. The inverting input terminal of power amplifier U2 is grounded through the eighth resistor R8. The output terminal of power amplifier U2 is connected to its inverting input terminal through the ninth resistor R9.

[0047] The fifth resistor, R5, serves as the primary resistor for current sensing. Connected in series with the circuit under test, it converts the current into a voltage drop. R5 and the sixth resistor, R6, together form a voltage divider network for current sensing and also act as the input resistor for power amplifier U2, transmitting the converted voltage signal to U2. The third capacitor, C3, is connected in parallel between the sixth resistor, R6, and the non-inverting input of power amplifier U2. It filters out high-frequency noise in the input signal, improving signal purity. Similarly, the fourth capacitor, C4, reduces signal fluctuations at the corresponding location, resulting in a smoother signal. The seventh resistor, R7, and the fifth capacitor, C5, form an RC low-pass filter to filter out high-frequency interference and improve signal stability. The eighth resistor, R8, provides a stable reference potential for power amplifier U2, contributing to stable amplifier output. The ninth resistor, R9, acts as the feedback resistor for power amplifier U2, forming a negative feedback circuit that helps stabilize the amplifier's gain and bandwidth, reducing nonlinear distortion.

[0048] Reference Figure 8 It is understood that the temperature detection module includes a tenth resistor R10 and a thermistor. One end of the tenth resistor R10 is the input terminal of the temperature detection module, and the other end of the tenth resistor R10 is grounded through the thermistor. The output terminal of the temperature detection module is between the tenth resistor R10 and the thermistor. The thermistor is the core component of the temperature detection module. Utilizing the thermistor's temperature-sensitive characteristic, its resistance changes with the ambient temperature. The thermistor and the tenth resistor R10 form a voltage divider circuit, converting temperature changes into voltage signal changes. When the ambient temperature rises, the thermistor's resistance usually decreases, and conversely, when the ambient temperature decreases, the resistance increases. Because the thermistor has a large resistance range and is sensitive to temperature, this characteristic of resistance changing with temperature allows the thermistor to be used as a temperature detection module. Therefore, it can provide high-precision temperature detection. The thermistor model can be CMFA103J3500HANB-RT, but this application does not limit it to this model.

[0049] Reference Figure 9It is understood that the fast charging protocol detection module includes an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, and a fourteenth resistor R14. One end of the eleventh resistor R11 is connected to the D+ terminal, serving as the first input terminal of the fast charging protocol detection module. The other end of the eleventh resistor R11 is grounded through the twelfth resistor R12. One end of the thirteenth resistor R13 is connected to the D- terminal, serving as the second input terminal of the fast charging protocol detection module. The other end of the thirteenth resistor R13 is grounded through the fourteenth resistor R14. The connection between the eleventh resistor R11 and the twelfth resistor R12, and the connection between the thirteenth resistor R13 and the fourteenth resistor R14, respectively serve as the two output terminals of the fast charging protocol detection module. The eleventh resistor R11 and the twelfth resistor R12 form a voltage divider circuit for the D+ terminal, and the thirteenth resistor R13 and the fourteenth resistor R14 form a voltage divider circuit for the D- terminal, thereby obtaining the voltages of the D+ and D- terminals. Different fast charging protocols will generate specific voltage signals or signal sequences on the D+ and D- terminals. By obtaining the voltage conditions of the D+ and D- terminals, the corresponding fast charging protocol type can be obtained by looking up the table.

[0050] Reference Figure 1 and Figure 2 It is understood that a display module 600 is provided on the surface of the housing 130. The power supply terminal of the display module 600 is connected to the output terminal of the power management module 300, and the input terminal of the display module 600 is connected to the output terminal of the main control module 400, for displaying the detection data obtained from the detection module 200.

[0051] Reference Figure 1 , 2 and Figure 10 Understandably, a button module 700 is also provided on the surface of the housing 130. One end of the button module 700 is connected to the input terminal of the main control module 400 and the output terminal of the power management module 300, respectively, and the other end of the button module 700 is grounded, used to switch the display state of the display module 600. When the user presses a button, the button module 700 generates a low level, which is then transmitted to the main control module 400 to control the content displayed by the display module 600.

[0052] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. A charging interface detection device, characterized in that, include: The housing has a male charging connector and a female charging socket at its two ends. The male charging connector is used to connect to an external power adapter, and the female charging socket is used to connect to a charging load via a charging cable. The pins of the male charging connector and the pins of the female charging socket are connected in a one-to-one correspondence. The pins of the male charging connector include a VBUS terminal, a D+ terminal, and a D- terminal. A circuit board is disposed within the housing. The circuit board includes a power management module, a main control module, a detection module, and an NFC radio frequency module. The input terminal of the power management module is connected to the VBUS terminal, and the output terminal of the power management module is connected to the main control module and the NFC radio frequency module. The input terminal of the detection module is connected to the VBUS terminal, the D+ terminal, the D- terminal, the output terminal of the power management module, and the load ground terminal of the charging female connector. The multiple output terminals of the detection module are connected to the main control module, and the output terminal of the main control module is connected to the NFC radio frequency module. The NFC radio frequency module is used to convert the detection data obtained by the detection module into radio frequency data and transmit it.

2. The charging interface detection device according to claim 1, characterized in that, The NFC radio frequency module includes a reader chip, a matching circuit, and a coil antenna. The input terminal of the reader chip is connected to the output terminal of the main control module. The first and second transmitting terminals of the reader chip are respectively connected to the first and second input terminals of the matching circuit. The first and second output terminals of the matching circuit are respectively connected to the two ends of the coil antenna.

3. The charging interface detection device according to claim 2, characterized in that, The matching circuit includes a first inductor, a second inductor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a first resistor, and a second resistor. The first transmitting end of the reader chip is connected to the first end of the coil antenna in sequence through the first inductor, the first capacitor, and the first resistor. The second transmitting end of the reader chip is connected to the second end of the coil antenna in sequence through the second inductor, the second capacitor, and the second resistor. One end of the third capacitor is connected between the first inductor and the first capacitor. One end of the fourth capacitor is connected between the second inductor and the second capacitor. The other end of the third capacitor is connected to the other end of the fourth capacitor. One end of the fifth capacitor is connected between the first capacitor and the first resistor. One end of the sixth capacitor is connected between the second capacitor and the second resistor. The other end of the fifth capacitor is connected to the other end of the sixth capacitor.

4. The charging interface detection device according to claim 1, characterized in that, The detection module includes a voltage detection module, a current detection module, a temperature detection module, and a fast charging protocol detection module. The input terminal of the voltage detection module is connected to the VBUS terminal, the input terminal of the current detection module is connected to the load ground terminal of the charging socket, the input terminal of the temperature detection module is connected to the output terminal of the power management module, the first and second input terminals of the fast charging protocol detection module are connected to the D+ terminal and the D- terminal, respectively, and the output terminals of the voltage detection module, the current detection module, the temperature detection module, and the fast charging protocol detection module are connected to the main control module.

5. The charging interface detection device according to claim 4, characterized in that, The voltage detection module includes a third resistor and a fourth resistor. One end of the third resistor is the input terminal of the voltage detection module, and the other end of the third resistor is grounded through the fourth resistor. The area between the third resistor and the fourth resistor is the output terminal of the voltage detection module.

6. The charging interface detection device according to claim 4, characterized in that, The current detection module includes a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a third capacitor, a fourth capacitor, a fifth capacitor, and a power amplifier. One end of the fifth resistor is connected to one end of the sixth resistor, and the area between the fifth and sixth resistors forms the input terminal of the current detection module. The other end of the fifth resistor is grounded. The other end of the sixth resistor is connected to the non-inverting input terminal of the power amplifier. The sixth resistor and the non-inverting input terminal of the power amplifier are grounded through the third capacitor. The positive power supply terminal of the power amplifier is connected to the output terminal of the power management module. The positive power supply terminal of the power amplifier and the output terminal of the power management module are grounded through the fourth capacitor. The negative power supply terminal of the power amplifier is grounded. The output terminal of the power amplifier is grounded sequentially through the seventh resistor and the fifth capacitor. The area between the seventh resistor and the fifth capacitor forms the output terminal of the current detection module. The inverting input terminal of the power amplifier is grounded through the eighth resistor. The output terminal of the power amplifier is connected to its inverting input terminal through the ninth resistor.

7. The charging interface detection device according to claim 4, characterized in that, The temperature detection module includes a tenth resistor and a thermistor. One end of the tenth resistor is the input terminal of the temperature detection module, and the other end of the tenth resistor is grounded through the thermistor. The area between the tenth resistor and the thermistor is the output terminal of the temperature detection module.

8. The charging interface detection device according to claim 4, characterized in that, The fast charging protocol detection module includes an eleventh resistor, a twelfth resistor, a thirteenth resistor, and a fourteenth resistor. One end of the eleventh resistor is connected to the D+ terminal, serving as the first input terminal of the fast charging protocol detection module. The other end of the eleventh resistor is grounded through the twelfth resistor. One end of the thirteenth resistor is connected to the D- terminal, serving as the second input terminal of the fast charging protocol detection module. The other end of the thirteenth resistor is grounded through the fourteenth resistor. The points between the eleventh and twelfth resistors, and between the thirteenth and fourteenth resistors, serve as the two output terminals of the fast charging protocol detection module.

9. The charging interface detection device according to claim 1, characterized in that, A display module is provided on the surface of the housing. The power supply terminal of the display module is connected to the output terminal of the power management module, and the input terminal of the display module is connected to the output terminal of the main control module, for displaying the detection data obtained from the detection module.

10. The charging interface detection device according to claim 9, characterized in that, The surface of the housing is also provided with a button module. One end of the button module is connected to the input terminal of the main control module and the output terminal of the power management module, respectively. The other end of the button module is grounded and used to switch the display state of the display module.

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