CN-121978409-A - DP-DN line for checking internal resistance of wire rod

Abstract

The invention relates to the field of detection of charging cables, and discloses a DP-DN line for checking internal resistance of a wire, which comprises an intelligent control module arranged in a charging adapter and an intelligent management module arranged in electronic equipment. The two modules are in communication negotiation through the data wire core to determine a basic internal resistance test mode or an advanced diagnosis mode. In the base mode, direct current resistance measurements are performed in tandem. In the advanced diagnosis mode, the intelligent control module injects alternating current detection signals and collects phase quantity of the adapter end, and the intelligent management module collects phase quantity of the electronic equipment end and returns the phase quantity through the load modulation unit. The central control unit of the intelligent control module calculates complex impedance according to the phasors at two ends, and compares the real-time impedance spectrum with a fault characteristic library through a diagnosis and matching engine to determine a state identifier. The adaptive charging strategy controller adjusts the charging parameters accordingly. The invention can accurately diagnose the cable state and realize self-adaptive safe charging.

Inventors

• NIE XIAOZHI
• LIU WANLE

Assignees

• 苏州美思迪赛半导体技术有限公司

Dates

Publication Date

20260505

Application Date

20251217

Claims (10)

1. 1. A DP-DN line for checking internal resistance of a wire is characterized by comprising The intelligent control module is arranged in the charging adapter; The intelligent management module is arranged inside the electronic equipment; The intelligent control module and the intelligent management module carry out communication negotiation through the data wire core to determine a working mode, and the working mode comprises a basic internal resistance test mode and an advanced diagnosis mode.
2. 2. The DP-DN line for checking internal resistance of a wire according to claim 1, wherein in said basic internal resistance test mode, said intelligent management module sends a wire internal resistance test command to said intelligent control module, said wire internal resistance test command carrying a preset dc test current value; The intelligent control module outputs current according to the preset direct current test current value, acquires a direct current voltage value of an electric energy output port of the charging adapter and sends the direct current voltage value to the intelligent management module; The intelligent management module collects a direct-current voltage value of an electric energy receiving port of the electronic equipment, and calculates an average direct-current resistance of a single power wire core according to the direct-current voltage value of an electric energy output port of the charging adapter, the direct-current voltage value of the electric energy receiving port of the electronic equipment and the preset direct-current test current value.
3. 3. A DP-DN line for checking internal resistance of a wire according to claim 2, wherein in the advanced diagnostic mode the intelligent control module comprises: A first Data Plus-Data Minus communication unit for transmitting a capability query Data frame to the intelligent management module and receiving a response Data frame containing an advanced diagnosis mode support status; the multi-frequency alternating current signal injection unit is used for superposing an alternating current detection signal on the power wire core; The broadband impedance measurement unit is used for synchronously collecting alternating voltage phasors and total alternating current phasors of the output port of the charging adapter; The power line carrier demodulation unit is used for extracting and decoding the data signals sent by the intelligent management module through a load modulation mode; And a central control unit.
4. 4. A DP-DN line for checking internal resistance of wires according to claim 3, wherein the central control unit is configured to: And calculating the complex impedance of the DP-DN line according to the alternating voltage phasors and the total alternating current phasors acquired by the broadband impedance measuring unit and the alternating voltage phasors of the electric energy receiving port of the electronic equipment decoded by the power line carrier demodulation unit.
5. 5. A DP-DN line for checking internal resistance of a wire according to claim 4, wherein the central control unit further includes: A fault signature memory for storing a plurality of standard impedance spectrum vectors; A diagnostic and matching engine for comparing a real-time impedance spectrum formed based on the complex impedance with the standard impedance spectrum vector to determine a status identifier; And the self-adaptive charging strategy controller is used for searching a corresponding charging control instruction set in the strategy lookup table according to the state identifier and adjusting the output parameters of the power management integrated circuit according to the corresponding charging control instruction set.
6. 6. A DP-DN line for checking internal resistance of a wire according to claim 3, wherein the multi-frequency ac signal injection unit includes: the digital-to-analog converter is used for converting the digital waveform instruction into an analog voltage signal; The voltage-controlled current source is used for generating an alternating current signal according to the analog voltage signal; and the DC blocking coupling capacitor is used for injecting the alternating current signal into the power wire core.
7. 7. A DP-DN line for checking internal resistance of a wire according to claim 1, wherein the intelligent management module includes: a second Data Plus-Data Minus communication unit for receiving the capability inquiry Data frame and transmitting the response Data frame; And the alternating current signal sensing unit is used for collecting alternating current voltage of the electric energy receiving port of the electronic equipment in the advanced diagnosis mode and calculating an alternating current voltage phasor.
8. 8. The DP-DN line for checking internal resistance of a wire according to claim 7, wherein the intelligent management module further comprises: and the load modulation unit is used for encoding the alternating voltage phasors calculated by the alternating current signal sensing unit and sending the alternating voltage phasors back to the intelligent control module by applying a controlled disturbance on the total charging current of the electronic equipment.
9. 9. A DP-DN line for checking internal resistance of a wire according to claim 8, wherein the load modulation unit includes: a controlled switching element; A load resistor connected in series with the controlled switching element; And the switch driving circuit is used for controlling the on and off of the controlled switching element.
10. 10. A DP-DN line for checking internal resistance of a wire according to claim 8, wherein the ac signal sensing unit includes: The input end of the differential amplifier is connected to a physical pin of an electric energy receiving port of the electronic equipment through a blocking capacitor; and the analog-to-digital converter is used for digitizing the analog voltage signal output by the differential amplifier.

Description

DP-DN line for checking internal resistance of wire rod Technical Field The invention relates to the field of detection of charging cables, in particular to a DP-DN line for checking internal resistance of a wire rod. Background With the popularization of electronic devices and the development of charging technology, a DP-DN line is used as a key component for connecting a charging adapter and the electronic device, and the charging power carried by the DP-DN line is increasingly larger. The electrical characteristics of the DP-DN line, particularly its internal resistance, have a direct impact on charging efficiency and safety. In existing charging schemes, charging adapters and electronic devices often lack an effective means of sensing the electrical characteristics of the DP-DN line used. The charging system has difficulty in knowing the exact internal resistance of the cable and therefore cannot match an optimal charging current accordingly. This results in reduced charging efficiency or overheating of the cable when charging with a large current, due to an unknown or too high internal resistance of the cable. Furthermore, the electrical state of the cable is not constant. In the charging process, the cable body heats due to long-time high current, so that the resistivity rises, or the contact resistance increases due to poor contact of the connector port. The prior art generally lacks a mechanism, and can measure and diagnose the DC internal resistance of the cable and even more complex AC impedance characteristics in real time and accurately during the connection of the cable and the whole charging process. This lack of information makes the charging strategy unable to adaptively adjust according to the actual health status of the cable, thereby presenting a safety hazard in the face of conditions such as cable degradation, poor contact or overheating. Disclosure of Invention The invention aims to provide a DP-DN line for checking internal resistance of a wire rod, and aims to solve the technical problems that the existing DP-DN line cannot actively monitor the electrical characteristics and health states of a cable in real time when a charging adapter is connected with electronic equipment, so that the charging efficiency is reduced or potential safety hazards exist. In order to achieve the above purpose, the invention adopts the following technical scheme: A DP-DN line for checking internal resistance of a wire is provided, which includes an intelligent control module disposed inside a charging adapter, and an intelligent management module disposed inside an electronic device. The intelligent control module and the intelligent management module negotiate for communication via Data cores (e.g., data Plus and Data Minus cores) within the DP-DN line to determine an operational mode. The operation modes include a basic internal resistance test mode and an advanced diagnosis mode. In the technical scheme of the invention, when the intelligent management module works in a basic internal resistance test mode, the intelligent management module initiates a test flow. The intelligent management module sends a wire internal resistance test instruction carrying a preset direct current test current value to the intelligent control module. The intelligent control module responds to the instruction, outputs the preset direct current test current, simultaneously collects the direct current voltage value of the electric energy output port of the charging adapter and sends the direct current voltage value to the intelligent management module. After the intelligent management module collects the direct-current voltage value of the electric energy receiving port of the electronic equipment, the intelligent management module calculates to obtain the average direct-current resistance of the single power wire core according to the direct-current voltage value of the electric energy output port of the charging adapter, the direct-current voltage value of the electric energy receiving port of the electronic equipment and the preset direct-current test current value. When operating in an advanced diagnostic mode, the intelligent control module cooperates with the intelligent management module to perform measurements and diagnostics of the multi-frequency impedance spectrum. In this mode, the intelligent control module includes a first Data Plus-Data Minus communication unit for transmitting a capability query Data frame to the intelligent management module and receiving a response Data frame containing an advanced diagnosis mode support status, thereby completing negotiation of the operation mode. The intelligent control module also comprises a multi-frequency alternating current signal injection unit which is used for superposing an alternating current detection signal (or a series of alternating current detection signals) with specific frequency on the power line core of the DP-DN line. Further, the multi-frequency ac sig