Signal detection and wake-up circuit

Abstract

The invention, which belongs to the technical field of new energy automobile charging, discloses a signal detection and wake-up circuit comprising a power supply input module, a signal detection module, a micro-control module and a wake-up module. Wherein the power supply input module is connected with the signal detection module and is used for sending an initial signal to the signal detection module; the signal detection module is connected with the micro-control module and is used for detecting a CP signal and a CC signal according to the initial signal and transmitting a detection result to the micro-control module; the micro-control module is connected with the wake-up module and is used for sending a control signal to the wake-up module according to the detection result; and the awakening module is used for controlling the charging and discharging process between the electric vehicle and the power supply equipment according to the control signal. According to the invention, by improving the signal detection precision and stability, enhancing the anti-interference capability and realizing intelligent control and efficient charging and discharging management, the overall performance of the new energy automobile charging system is significantly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicle charging, and in particular to a signal detection and wake-up circuit. Background Art

[0002] With the rapid development of the new energy vehicle industry, the safety and convenience of the charging system have become key technical challenges. New energy vehicles, as a type of vehicle that uses batteries as a storage power source, provide electricity to the motor through the battery to drive the vehicle. During the charging process, the CP (Charge Pilot) signal and CC (Charge Control) signal play a vital role.

[0003] The CP signal is mainly used for AC charging piles. The charging pile and the car can only communicate through the CP signal to determine and control the charging current and status. The CC signal is a judgment signal for whether the charging plug and the charging socket are connected. The CC signal can be used to determine the capacitance and resistance values, thereby confirming the status of the charging connection.

[0004] However, there are some technical problems with the control guidance circuit of the prior art, which cannot meet the complex logic functions under various working conditions (such as high and low temperature, electromagnetic compatibility testing, etc.). In addition, the noise and interference sources in electric vehicles and charging piles can easily affect the detection accuracy, making it impossible for the signal to be effectively detected and triggered to wake up when the conditions are met. These problems have greatly restricted the development of domestic electric vehicles and their promotion in overseas markets. Therefore, the development of a wake-up circuit that can accurately detect CP and CC signals and work stably under various working conditions is of great significance to improving the overall performance of new energy vehicle charging systems. Summary of the invention

[0005] To solve the above problems, the present invention provides a signal detection and wake-up circuit, which significantly improves the overall performance of the new energy vehicle charging system by improving signal detection accuracy and stability, enhancing anti-interference ability, and realizing intelligent control and efficient charging and discharging management.

[0006] The above objectives can be achieved through the following solutions:

[0007] A signal detection and wake-up circuit comprises a power supply input module, a signal detection module, a microcontroller module and a wake-up module; wherein the power supply input module is connected to the signal detection module and is used to send an initial signal to the signal detection module; the signal detection module is connected to the microcontroller module and is used to detect a CP signal and a CC signal according to the initial signal, and transmit the detection result to the microcontroller module; the microcontroller module is connected to the wake-up module and is used to send a control signal to the wake-up module according to the detection result; the wake-up module is used to control the charging and discharging process between the electric vehicle and the power supply equipment according to the control signal.

[0008] Optionally, the signal detection module includes: a CP signal detection submodule, the CP signal detection submodule includes a CP signal acquisition unit, a CP signal amplitude detection unit and a CP signal duty cycle detection unit; wherein the CP signal acquisition unit is connected to the power supply input module, and is used to acquire the CP signal from the initial signal; the CP signal amplitude detection unit is respectively connected to the CP signal acquisition unit and the microcontrol module, and is used to detect the voltage amplitude of the CP signal and send it to the microcontrol module; the CP signal duty cycle detection unit is respectively connected to the CP signal acquisition unit and the microcontrol module, and is used to detect the duty cycle value of the CP signal and send it to the microcontrol module.

[0009] Optionally, the CP signal acquisition unit includes: a resistor R1, a resistor R2, a resistor R3, and a diode D1; wherein the input end of the diode D1 is connected to the output end of the power supply input module, the output end of the diode D1 is respectively connected to the input end of the resistor R1, the input end of the resistor R2, and the input end of the CP signal duty cycle detection unit, the output end of the resistor R1 is connected to the ground end, the output end of the resistor R2 is respectively connected to the input end of the resistor R3 and the input end of the CP signal amplitude detection unit, and the output end of the resistor R3 is connected to the ground end.

[0010] Optionally, the CP signal amplitude detection unit includes: a resistor R4, a resistor R5, a capacitor C1, and a capacitor C2; wherein the input end of the resistor R4 is connected to the output end of the resistor R2, the output end of the resistor R4 is respectively connected to the input end of the capacitor C1 and the input end of the resistor R5, the output end of the capacitor C1 is connected to the ground end, the output end of the resistor R5 is respectively connected to the input end of the capacitor C2 and the input end of the micro-control module, and the output end of the capacitor C2 is connected to the ground end.

[0011] Optionally, the CP signal duty cycle detection unit includes: a resistor R6, a resistor R7, a resistor R8, a voltage regulator diode D2, and a MOS tube Q1; wherein, the input end of the resistor R6 is connected to the output end of the diode D1, the output end of the resistor R6 is respectively connected to the output end of the voltage regulator tube D2, the output end of the resistor R8 and the gate of the MOS tube Q1, the source of the MOS tube Q1 is respectively connected to the input end of the voltage regulator tube D2, the input end of the resistor R8 and the ground end, the drain of the MOS tube Q1 is connected to the input end of the resistor R7, and the output end of the resistor R7 is respectively connected to the first output end of the internal power supply and the input end of the micro-control module.

[0012] Optionally, the signal detection module also includes: a CC signal detection submodule, the CC signal detection submodule includes a CC signal acquisition unit and a CC signal amplitude detection unit; wherein the CC signal acquisition unit is connected to the power supply input module, and is used to acquire the CC signal from the initial signal; the CC signal amplitude detection unit is respectively connected to the CC signal acquisition unit and the microcontrol module, and is used to detect the voltage amplitude of the CC signal and send it to the microcontrol module.

[0013] Optionally, the CC signal acquisition unit includes: a resistor R9 and a capacitor C3; wherein the input end of the resistor R9 is respectively connected to the output end of the power supply input module and the input end of the capacitor C3, and the output end of the resistor R9 is connected to the input end of the CC signal amplitude detection unit.

[0014] Optionally, the CC signal amplitude detection unit includes: a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a capacitor C4, a capacitor C5, a capacitor C6, a Schottky diode D3, a Schottky diode D4, a MOS tube Q2, and a MOS tube Q3; wherein the drain of the MOS tube Q2 is connected to the output end of the resistor R9, the source of the MOS tube Q2 is respectively connected to the input end of the capacitor C5, the input end of the Schottky diode D3, the input end of the Schottky diode D4, and the input end of the resistor R10, and the gate of the MOS tube Q2 is respectively connected to the output end of the capacitor C5, the input end of the resistor R11, and the output end of the resistor R12; the output end of the resistor R11 is connected to the ground end, and the input end of the resistor R12 is connected to the internal The output end of the Schottky diode D3 is connected to the first output end of the internal power supply; the output end of the resistor R10 is respectively connected to the input end of the capacitor C4 and the input end of the micro-control module, and the output end of the capacitor C4 is connected to the ground end; the drain of the MOS tube Q3 is connected to the output end of the resistor R9, the source of the MOS tube Q3 is respectively connected to the input end of the capacitor C6 and the output end of the resistor R15, and the gate of the MOS tube Q3 is respectively connected to the output end of the capacitor C6, the input end of the resistor R14, and the output end of the resistor R13; the input end of the resistor R13 is connected to the second output end of the internal power supply, the output end of the resistor R14 is connected to the ground end, and the input end of the resistor R15 is connected to the first output end of the internal power supply.

[0015] Optionally, the wake-up module includes a CP signal wake-up submodule and a power management unit, and the CP signal wake-up submodule includes a CP signal trigger unit and a CP signal wake-up unit; wherein the CP signal trigger unit includes a resistor R16, a resistor R17, a resistor R18, a capacitor C7, and a transistor Q4; the input end of the resistor R16 is connected to the output end of the diode D1, the output end of the resistor R16 is connected to the collector of the transistor Q4, and the emitter of the transistor Q4 is respectively connected to the output end of the resistor R18, the capacitor C The output end of the resistor R7 is connected to the ground end, the base of the transistor Q4 is respectively connected to the input end of the resistor R18, the input end of the capacitor C7, and the output end of the resistor R17, and the input end of the resistor R17 is connected to the output end of the micro-control module; the CP signal wake-up unit includes a resistor R19, the input end of the resistor R19 is connected to the output end of the resistor R2, and the output end of the resistor R19 is connected to the input end of the power management unit; the power management unit is used to manage and control the charging and discharging process between the electric vehicle and the power supply equipment.

[0016] Optionally, the wake-up module further includes a CC signal wake-up submodule, and the CC signal wake-up submodule includes a CC signal trigger unit and a CC signal wake-up unit; wherein the CC signal trigger unit includes a Schottky diode D5, a Schottky diode D6, and a resistor R20, the output end of the power supply input module is respectively connected to the cathode of the Schottky diode D5 and the cathode of the Schottky diode D6, the input end of the resistor R20 is respectively connected to the anode of the Schottky diode D5 and the anode of the Schottky diode D6, and the output end of the resistor R20 is connected to the CC The input end of the CC signal wake-up unit is connected; the CC signal wake-up unit includes a voltage regulator tube D7, a capacitor C8, a resistor R21, and a MOS tube Q5, the output end of the resistor R20 is respectively connected to the input end of the voltage regulator tube D7, the output end of the capacitor C8, the output end of the resistor R21, and the gate of the MOS tube Q5, the source of the MOS tube Q5 is respectively connected to the output end of the voltage regulator tube D7, the input end of the capacitor C8, the input end of the resistor R21, and the third output end of the internal power supply, and the drain of the MOS tube Q5 is connected to the input end of the power management unit.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. The present invention can accurately collect and detect the voltage amplitudes of the CP signal and the CC signal and the duty cycle of the CP signal through a carefully designed signal detection module, including a CP signal detection submodule and a CC signal detection submodule; this design effectively improves the accuracy of signal detection, especially under various complex working conditions (such as high and low temperature, electromagnetic compatibility testing, etc.), and can maintain stable detection performance;

[0019] 2. Aiming at the noise and interference sources that may exist in electric vehicles and charging piles, the present invention adopts a filtering and shaping circuit composed of components such as resistors, capacitors, diodes and MOS tubes in the signal detection module, which effectively filters out high-frequency noise and interference, and improves the purity and reliability of the signal; this design enables the circuit to accurately identify and transmit effective signals in a noisy environment, and enhances the overall anti-interference ability;

[0020] 3. The present invention uses a microcontroller module to make intelligent judgments on the detection results, and sends a control signal to the wake-up module according to the judgment results, thereby realizing intelligent control of the charging and discharging process between the electric vehicle and the power supply equipment; after receiving the control signal, the wake-up module can quickly activate the full-function charging communication controller to manage and control the charging and discharging process; this design not only improves the charging efficiency, but also ensures the safety and stability of the charging process, providing users with a more convenient and efficient charging experience.

[0021] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a framework diagram of a signal detection and wake-up circuit according to an embodiment of the present invention.

[0024] Figure 2 It is a structural schematic diagram of a signal detection and wake-up circuit according to an embodiment of the present invention.

[0025] Figure 3 It is a circuit diagram of a CP signal detection submodule and a CP signal awakening submodule according to an embodiment of the present invention.

[0026] Figure 4 The circuit diagram of the CC signal detection submodule and the CC signal wake-up submodule of the embodiment of the present invention is DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Reference Figure 1 An embodiment of the present invention proposes a signal detection and wake-up circuit, which significantly improves the overall performance of the new energy vehicle charging system by improving signal detection accuracy and stability, enhancing anti-interference ability, and realizing intelligent control and efficient charging and discharging management.

[0029] The circuit of this embodiment specifically includes: a power supply input module, a signal detection module, a microcontroller module and a wake-up module; wherein,

[0030] The power supply input module is connected to the signal detection module and is used to send an initial signal to the signal detection module;

[0031] Specifically, the power input module is the power input of the entire circuit. It is responsible for inputting the initial signal provided by the external power supply into the signal detection module. The initial signal can be DC or AC. This module usually includes some basic power processing circuits, such as filtering, voltage stabilization, etc., to ensure the stable operation of subsequent circuits.

[0032] The signal detection module is connected to the microcontroller module and is used to detect the CP signal and the CC signal according to the initial signal and transmit the detection result to the microcontroller module;

[0033] Specifically, the CP (Charge Pilot) signal is mainly used in AC charging piles to determine and control the charging current and status; the CP signal detection submodule in the signal detection module includes a CP signal acquisition unit, a CP signal amplitude detection unit and a CP signal duty cycle detection unit, which are responsible for acquiring the CP signal and detecting the voltage amplitude and duty cycle value of the CP signal respectively; the CC (Charge Control) signal is used to confirm the connection status of the charging plug and the charging socket; the CC signal detection submodule includes a CC signal acquisition unit and a CC signal amplitude detection unit, which are responsible for acquiring the CC signal and detecting its voltage amplitude respectively.

[0034] The microcontroller module is connected to the wake-up module and is used to send a control signal to the wake-up module according to the detection result;

[0035] Specifically, the microcontroller module is the intelligent core of the circuit. It receives the detection results from the signal detection module and sends corresponding control signals to the wake-up module according to preset logical judgment conditions. The microcontroller module usually includes a microprocessor (such as MCU) and its peripheral circuits, which can realize complex logical judgment and data processing functions.

[0036] The wake-up module is used to control the charging and discharging process between the electric vehicle and the power supply equipment according to the control signal.

[0037] Specifically, the wake-up module realizes the wake-up operation of the full-function charging communication controller through a series of circuit elements according to the control signal sent by the microcontroller module; the circuit elements can be resistors, capacitors, and transistors; at the same time, the module also includes a power management unit for managing and controlling the charging and discharging process between the electric vehicle and the power supply equipment.

[0038] Exemplarily, when the driver inserts the charging gun into the vehicle's charging port, the signal detection and wake-up circuit starts working; the power supply input module outputs voltage signals and current signals; the signal detection module quickly captures the CP signal and CC signal, and transmits the detection results to the microcontrol module; the microcontrol module makes a judgment after receiving the detection results, and if the CP signal and CC signal both meet the preset conditions, a control signal is sent to the wake-up module; the wake-up module activates the full-function charging communication controller to control the charging and discharging process between the electric vehicle and the power supply equipment according to the control signal of the microcontrol module.

[0039] Optionally, the signal detection module includes: a CP signal detection submodule, the CP signal detection submodule includes a CP signal acquisition unit, a CP signal amplitude detection unit and a CP signal duty cycle detection unit; wherein,

[0040] The CP signal acquisition unit is connected to the power supply input module and is used to acquire the CP signal from the initial signal;

[0041] Specifically, the CP signal acquisition unit usually includes components such as resistors and diodes, which are used for preliminary processing and filtering of signals; assuming that the initial signal output by the power supply input module is a composite signal containing multiple noises, the CP signal acquisition unit extracts a relatively pure CP signal through resistor voltage division and diode rectification.

[0042] The CP signal amplitude detection unit is connected to the CP signal acquisition unit and the micro-control module respectively, and is used to detect the voltage amplitude of the CP signal and send it to the micro-control module;

[0043] Specifically, the CP signal amplitude detection unit generally includes components such as resistors, capacitors and operational amplifiers, which are used for signal amplification and filtering to ensure the accuracy of amplitude detection; after the CP signal amplitude detection unit receives the collected CP signal, it amplifies it through an operational amplifier, and finally obtains a stable voltage amplitude output through resistor voltage division and capacitor filtering, which is sent to the microcontroller module.

[0044] The CP signal duty cycle detection unit is connected to the CP signal acquisition unit and the microcontrol module respectively, and is used to detect the duty cycle value of the CP signal and send it to the microcontrol module.

[0045] Specifically, it usually includes components such as resistors, capacitors, voltage-stabilizing diodes and MOS tubes, which are used for signal shaping and duty cycle calculation; after the CP signal duty cycle detection unit receives the collected CP signal, it first shapes the signal through voltage-stabilizing diodes and resistors, then measures the high-level time through the switching circuit composed of the MOS tube, and finally calculates the duty cycle value and sends it to the microcontroller module.

[0046] For example, Figure 2 As shown, the initial signal output by the charging pile contains the CP signal and other clutter; the CP signal acquisition unit extracts a pure CP signal through resistor voltage division and diode rectification; after receiving the collected CP signal, the CP signal amplitude detection unit obtains a stable voltage amplitude output through resistor voltage division and capacitor filtering; this value is sent to the microcontroller module, indicating the current CP signal strength; when the microcontroller module detects that the voltage amplitude changes from 0V to 12V, it sends a control signal to the wake-up module, thereby waking up the full-function charging communication controller; after receiving the collected CP signal, the CP signal duty cycle detection unit sends it to the microcontroller module to calculate the duty cycle value; when the duty cycle value changes from 100% to 3% to 97%, the microcontroller module sends a control signal to the wake-up module, thereby waking up the full-function charging communication controller.

[0047] Optionally, the CP signal acquisition unit includes: a resistor R1, a resistor R2, a resistor R3, and a diode D1; wherein,

[0048] The input end of the diode D1 is connected to the output end of the power supply input module, the output end of the diode D1 is respectively connected to the input end of the resistor R1, the input end of the resistor R2, and the input end of the CP signal duty cycle detection unit, the output end of the resistor R1 is connected to the ground end, the output end of the resistor R2 is respectively connected to the input end of the resistor R3 and the input end of the CP signal amplitude detection unit, and the output end of the resistor R3 is connected to the ground end.

[0049] For example, Figure 3 As shown, when the power input module outputs the initial signal, the signal is first rectified by the diode D1 to ensure the unidirectionality of the signal; then, the signal is voltage-adjusted by the voltage divider circuit composed of the resistor R1 and the resistor R2 to obtain a CP signal suitable for subsequent circuit processing; at the same time, the resistor R3 and the resistor R2 further adjust the voltage level of the signal together and protect the subsequent circuit; finally, the processed CP signal is respectively transmitted to the CP signal amplitude detection unit and the CP signal duty cycle detection unit for further detection and analysis.

[0050] Optionally, the CP signal amplitude detection unit includes: a resistor R4, a resistor R5, a capacitor C1, and a capacitor C2; wherein,

[0051] The input end of the resistor R4 is connected to the output end of the resistor R2, the output end of the resistor R4 is respectively connected to the input end of the capacitor C1 and the input end of the resistor R5, the output end of the capacitor C1 is connected to the ground end, the output end of the resistor R5 is respectively connected to the input end of the capacitor C2 and the input end of the micro-control module, and the output end of the capacitor C2 is connected to the ground end.

[0052] For example, Figure 3 As shown, after the CP signal is divided by the resistor R2, it enters the CP signal amplitude detection unit; first, the signal is current limited and voltage divided by the resistor R4, and then preliminarily filtered by the capacitor C1 to remove high-frequency noise and fluctuations; then, the signal is further filtered by the RC low-pass filter composed of the resistor R5 and the capacitor C2 to obtain a smooth and stable voltage output; this voltage output represents the amplitude of the CP signal and is transmitted to the microcontroller module for processing and analysis.

[0053] Optionally, the CP signal duty cycle detection unit includes: a resistor R6, a resistor R7, a resistor R8, a voltage regulator diode D2, and a MOS tube Q1; wherein,

[0054] The input end of the resistor R6 is connected to the output end of the diode D1, the output end of the resistor R6 is respectively connected to the output end of the voltage regulator tube D2, the output end of the resistor R8 and the gate of the MOS tube Q1, the source of the MOS tube Q1 is respectively connected to the input end of the voltage regulator tube D2, the input end of the resistor R8 and the ground end, the drain of the MOS tube Q1 is connected to the input end of the resistor R7, and the output end of the resistor R7 is respectively connected to the first output end of the internal power supply and the input end of the micro-control module.

[0055] For example, Figure 3 As shown, after the CP signal is rectified by the diode D1 and divided by the resistor R6, it enters the CP signal duty cycle detection unit; the high level of the CP signal turns on the MOS tube Q1, and at this time, the first output terminal VDD5_D of the internal power supply provides a high level signal to the micro control module through the resistor R7; the low level of the CP signal turns off the MOS tube Q1, and at this time, the signal received by the micro control module is a low level; by measuring the high level and low level time, the duty cycle of the CP signal can be calculated; the voltage regulator diode D2 ensures that the gate voltage of the MOS tube Q1 is stable to prevent the duty cycle detection accuracy from being affected by voltage fluctuations.

[0056] Optionally, the signal detection module further includes: a CC signal detection submodule, the CC signal detection submodule includes a CC signal acquisition unit and a CC signal amplitude detection unit; wherein,

[0057] The CC signal acquisition unit is connected to the power supply input module and is used to acquire the CC signal from the initial signal.

[0058] The CC signal amplitude detection unit is connected to the CC signal acquisition unit and the micro-control module respectively, and is used to detect the voltage amplitude of the CC signal and send it to the micro-control module.

[0059] Exemplarily, when the charging device starts working, the CC signal enters the CC signal detection submodule through the power supply input module; first, the CC signal acquisition unit acquires and processes the CC signal to remove noise and interference to ensure the accuracy of the signal; then, the CC signal amplitude detection unit performs amplitude detection on the processed CC signal, converts the voltage amplitude into a digital signal, and sends it to the microcontroller module through the communication interface; the microcontroller module controls the charging current of the charging device according to the received CC signal amplitude to achieve constant current charging.

[0060] Optionally, the CC signal acquisition unit includes: a resistor R9 and a capacitor C3; wherein,

[0061] The input end of the resistor R9 is connected to the output end of the power supply input module and the input end of the capacitor C3 respectively, and the output end of the resistor R9 is connected to the input end of the CC signal amplitude detection unit.

[0062] For example, Figure 4 As shown, when the power input module outputs a CC signal, the signal first passes through an RC filter circuit composed of a resistor R9 and a capacitor C3; the resistor R9 limits the current of the signal to prevent excessive current; and the capacitor C3 filters the signal to remove high-frequency noise and interference; the CC signal after filtering is purer and more stable, and is then passed to the subsequent CC signal amplitude detection unit for processing.

[0063] Optionally, the CC signal amplitude detection unit includes: a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a capacitor C4, a capacitor C5, a capacitor C6, a Schottky diode D3, a Schottky diode D4, a MOS tube Q2, and a MOS tube Q3; wherein,

[0064] The drain of the MOS tube Q2 is connected to the output end of the resistor R9, the source of the MOS tube Q2 is respectively connected to the input end of the capacitor C5, the input end of the Schottky diode D3, the input end of the Schottky diode D4 and the input end of the resistor R10, and the gate of the MOS tube Q2 is respectively connected to the output end of the capacitor C5, the input end of the resistor R11 and the output end of the resistor R12; the output end of the resistor R11 is connected to the ground end, and the input end of the resistor R12 is connected to the second output end of the internal power supply; the output end of the Schottky diode D3 is connected to the first output end of the internal power supply; the output end of the resistor R10 is respectively connected to the input end of the capacitor C4 and the input end of the micro-control module, and the output end of the capacitor C4 is connected to the ground end;

[0065] The drain of the MOS tube Q3 is connected to the output end of the resistor R9, the source of the MOS tube Q3 is respectively connected to the input end of the capacitor C6 and the output end of the resistor R15, and the gate of the MOS tube Q3 is respectively connected to the output end of the capacitor C6, the input end of the resistor R14, and the output end of the resistor R13; the input end of the resistor R13 is connected to the second output end of the internal power supply, the output end of the resistor R14 is connected to the ground end, and the input end of the resistor R15 is connected to the first output end of the internal power supply.

[0066] For example, Figure 4 As shown, when the CC signal is transmitted from the CC signal acquisition unit, it is first filtered by a filter circuit composed of a resistor and a capacitor; then, the filtered signal is input to the drain of the MOS tube Q2 and the MOS tube Q3 respectively; the gate voltage of the MOS tube Q2 and the gate voltage of the MOS tube Q3 are provided by the second output terminal VDD18V of the internal power supply and obtained by resistor voltage division; when the voltage amplitude of the CC signal changes, it will cause the gate voltage of the MOS tube Q2 to change, thereby controlling the conduction state of the MOS tube Q2; the change of the conduction state of the MOS tube Q2 will cause the resistance value between the drain and the source to change, thereby affecting the voltage amplitude of the output signal; finally, the output signal after resistor voltage division and capacitor filtering is sent to the microcontroller module for processing.

[0067] Optionally, the wake-up module includes a CP signal wake-up submodule and a power management unit, and the CP signal wake-up submodule includes a CP signal trigger unit and a CP signal wake-up unit; wherein,

[0068] The CP signal trigger unit includes a resistor R16, a resistor R17, a resistor R18, a capacitor C7, and a transistor Q4; the input end of the resistor R16 is connected to the output end of the diode D1, the output end of the resistor R16 is connected to the collector of the transistor Q4, the emitter of the transistor Q4 is respectively connected to the output end of the resistor R18, the output end of the capacitor C7 and the ground end, the base of the transistor Q4 is respectively connected to the input end of the resistor R18, the input end of the capacitor C7, and the output end of the resistor R17, and the input end of the resistor R17 is connected to the output end of the micro-control module;

[0069] For example, Figure 4As shown, in the CP signal trigger unit of the CP signal wake-up submodule, when the CP signal changes, this change is first recognized by the micro control unit; after recognizing the PWM signal, the micro control unit will output a control signal; this control signal is transmitted to the base of the transistor Q4 through the series resistor R17, and at the same time, the resistor R18 and the capacitor C7 are connected in parallel between the base and the emitter of the transistor Q4; when the control signal output by the micro control unit is applied to the base of the transistor Q4 through the resistor R17, if the signal is strong enough (that is, the base voltage is high enough), the transistor Q4 will be turned on; after being turned on, the collector voltage of the transistor Q4 will decrease, and this reduced voltage will be transmitted to the negative electrode of the diode D1 through the series resistor R16; this forms It forms a signal path from the micro control unit to the cathode of the diode D1; at the same time, the resistor R18 and the capacitor C7 connected in parallel between the base and emitter of the transistor Q4 play an important role; the resistor R18 provides a stable bias voltage for the transistor Q4, and the capacitor C7 is used to filter out high-frequency noise and interference in the signal, ensuring that the signal transmitted to the base of the transistor Q4 is accurate and stable; in addition, the micro control unit is also responsible for controlling the amplitude of the sampling signal; this means that the micro control unit can adjust the strength of the output signal as needed to ensure that the transistor Q4 can be reliably turned on or off; by adjusting the amplitude of the sampling signal, the micro control unit can finely control the response characteristics of the CP signal trigger unit to meet different application requirements.

[0070] The CP signal wake-up unit includes a resistor R19, an input end of the resistor R19 is connected to an output end of the resistor R2, and an output end of the resistor R19 is connected to an input end of the power management unit;

[0071] For example, Figure 4 As shown, when the CP signal meets specific conditions (such as reaching a certain voltage threshold or a specific waveform), this signal will be transmitted to the power management unit through resistor R19; after receiving this signal, the power management unit will determine whether it is necessary to wake up the charging system or adjust the charging parameters based on the characteristics of the signal (such as voltage level, waveform, etc.).

[0072] The power management unit is used to manage and control the charging and discharging process between the electric vehicle and the power supply equipment.

[0073] Exemplarily, the power management unit is responsible for managing and controlling the charging and discharging process between the electric vehicle and the power supply equipment; it decides whether to start the charging or discharging operation based on the output signal of the CP signal wake-up submodule and the current state of the electric vehicle, and monitors the safety and stability of the entire charging and discharging process.

[0074] Optionally, the wake-up module further includes a CC signal wake-up submodule, and the CC signal wake-up submodule includes a CC signal trigger unit and a CC signal wake-up unit; wherein,

[0075] The CC signal trigger unit includes a Schottky diode D5, a Schottky diode D6, and a resistor R20, the output end of the power supply input module is respectively connected to the cathode of the Schottky diode D5 and the cathode of the Schottky diode D6, the input end of the resistor R20 is respectively connected to the anode of the Schottky diode D5 and the anode of the Schottky diode D6, and the output end of the resistor R20 is connected to the input end of the CC signal wake-up unit;

[0076] The CC signal wake-up unit includes a voltage regulator tube D7, a capacitor C8, a resistor R21, and a MOS tube Q5. The output end of the resistor R20 is respectively connected to the input end of the voltage regulator tube D7, the output end of the capacitor C8, the output end of the resistor R21, and the gate of the MOS tube Q5. The source of the MOS tube Q5 is respectively connected to the output end of the voltage regulator tube D7, the input end of the capacitor C8, the input end of the resistor R21, and the third output end of the internal power supply. The drain of the MOS tube Q5 is connected to the input end of the power management unit.

[0077] For example, Figure 4 As shown, the CC signal passes through Schottky diodes D5 and D6, and then through resistor R20, acting on the gate of MOS tube Q5; when the gate voltage reaches or exceeds the threshold voltage of MOS tube Q5, MOS tube Q5 is turned on, allowing current to flow from the third output terminal USB_SBC_F of the internal power supply through MOS tube Q5 to the input terminal of the power management unit; this current signal is the wake-up signal, notifying the power management unit to start or adjust the charging process.

[0078] It should be noted that the electrical connection between the above-mentioned units does not necessarily mean the connection between lines. An indirect connection method can be applied to the embodiments of the present invention as long as the purpose of the present invention is achieved.

[0079] The above is only an exemplary embodiment of the present invention and cannot be used to limit the scope of the present invention. That is, any equivalent changes and modifications made according to the teachings of the present invention are still within the scope of the present invention. After considering the disclosure of the specification and the truth of practice, it will be easy for those skilled in the art to think of other embodiments of the present invention. This application is intended to cover any variation, use or adaptive change of the present invention, which follows the general principles of the present invention and includes common knowledge or customary technical means in the technical field not recorded in the present invention.

Claims

1. A signal detection and wake-up circuit, characterized in that: The circuit includes: a power supply input module, a signal detection module, a microcontroller module and a wake-up module; wherein, The power supply input module is connected to the signal detection module and is used to send an initial signal to the signal detection module; The signal detection module is connected to the microcontroller module and is used to detect the CP signal and the CC signal according to the initial signal and transmit the detection result to the microcontroller module; The microcontroller module is connected to the wake-up module and is used to send a control signal to the wake-up module according to the detection result; The wake-up module is used to control the charging and discharging process between the electric vehicle and the power supply equipment according to the control signal.

2. A signal detection and wake-up circuit according to claim 1, characterized in that: The signal detection module includes: a CP signal detection submodule, the CP signal detection submodule includes a CP signal acquisition unit, a CP signal amplitude detection unit and a CP signal duty cycle detection unit; wherein, The CP signal acquisition unit is connected to the power supply input module and is used to acquire the CP signal from the initial signal; The CP signal amplitude detection unit is connected to the CP signal acquisition unit and the micro-control module respectively, and is used to detect the voltage amplitude of the CP signal and send it to the micro-control module; The CP signal duty cycle detection unit is connected to the CP signal acquisition unit and the microcontrol module respectively, and is used to detect the duty cycle value of the CP signal and send it to the microcontrol module.

3. A signal detection and wake-up circuit according to claim 2, characterized in that: The CP signal acquisition unit includes: a resistor R1, a resistor R2, a resistor R3, and a diode D1; wherein, The input end of the diode D1 is connected to the output end of the power supply input module, the output end of the diode D1 is respectively connected to the input end of the resistor R1, the input end of the resistor R2, and the input end of the CP signal duty cycle detection unit, the output end of the resistor R1 is connected to the ground end, the output end of the resistor R2 is respectively connected to the input end of the resistor R3 and the input end of the CP signal amplitude detection unit, and the output end of the resistor R3 is connected to the ground end.

4. A signal detection and wake-up circuit according to claim 2, characterized in that: The CP signal amplitude detection unit includes: a resistor R4, a resistor R5, a capacitor C1, and a capacitor C2; wherein, The input end of the resistor R4 is connected to the output end of the resistor R2, the output end of the resistor R4 is respectively connected to the input end of the capacitor C1 and the input end of the resistor R5, the output end of the capacitor C1 is connected to the ground end, the output end of the resistor R5 is respectively connected to the input end of the capacitor C2 and the input end of the micro-control module, and the output end of the capacitor C2 is connected to the ground end.

5. A signal detection and wake-up circuit according to claim 4, characterized in that: The CP signal duty cycle detection unit includes: a resistor R6, a resistor R7, a resistor R8, a voltage stabilizing diode D2, and a MOS tube Q1; wherein, The input end of the resistor R6 is connected to the output end of the diode D1, the output end of the resistor R6 is respectively connected to the output end of the voltage regulator tube D2, the output end of the resistor R8 and the gate of the MOS tube Q1, the source of the MOS tube Q1 is respectively connected to the input end of the voltage regulator tube D2, the input end of the resistor R8 and the ground end, the drain of the MOS tube Q1 is connected to the input end of the resistor R7, and the output end of the resistor R7 is respectively connected to the first output end of the internal power supply and the input end of the micro-control module.

6. A signal detection and wake-up circuit according to claim 1, characterized in that: The signal detection module further includes: a CC signal detection submodule, the CC signal detection submodule includes a CC signal acquisition unit and a CC signal amplitude detection unit; wherein, The CC signal acquisition unit is connected to the power supply input module and is used to acquire the CC signal from the initial signal. The CC signal amplitude detection unit is connected to the CC signal acquisition unit and the micro-control module respectively, and is used to detect the voltage amplitude of the CC signal and send it to the micro-control module.

7. A signal detection and wake-up circuit according to claim 6, characterized in that: The CC signal acquisition unit includes: a resistor R9 and a capacitor C3; wherein, The input end of the resistor R9 is connected to the output end of the power supply input module and the input end of the capacitor C3 respectively, and the output end of the resistor R9 is connected to the input end of the CC signal amplitude detection unit.

8. A signal detection and wake-up circuit according to claim 7, characterized in that: The CC signal amplitude detection unit includes: a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a capacitor C4, a capacitor C5, a capacitor C6, a Schottky diode D3, a Schottky diode D4, a MOS tube Q2, and a MOS tube Q3; wherein, The drain of the MOS tube Q2 is connected to the output end of the resistor R9, the source of the MOS tube Q2 is respectively connected to the input end of the capacitor C5, the input end of the Schottky diode D3, the input end of the Schottky diode D4 and the input end of the resistor R10, and the gate of the MOS tube Q2 is respectively connected to the output end of the capacitor C5, the input end of the resistor R11 and the output end of the resistor R12; the output end of the resistor R11 is connected to the ground end, and the input end of the resistor R12 is connected to the second output end of the internal power supply; the output end of the Schottky diode D3 is connected to the first output end of the internal power supply; the output end of the resistor R10 is respectively connected to the input end of the capacitor C4 and the input end of the micro-control module, and the output end of the capacitor C4 is connected to the ground end; The drain of the MOS tube Q3 is connected to the output end of the resistor R9, the source of the MOS tube Q3 is respectively connected to the input end of the capacitor C6 and the output end of the resistor R15, and the gate of the MOS tube Q3 is respectively connected to the output end of the capacitor C6, the input end of the resistor R14, and the output end of the resistor R13; the input end of the resistor R13 is connected to the second output end of the internal power supply, the output end of the resistor R14 is connected to the ground end, and the input end of the resistor R15 is connected to the first output end of the internal power supply.

9. The signal detection and wake-up circuit according to claim 3, characterized in that: The wake-up module includes a CP signal wake-up submodule and a power management unit, and the CP signal wake-up submodule includes a CP signal trigger unit and a CP signal wake-up unit; wherein, The CP signal trigger unit includes a resistor R16, a resistor R17, a resistor R18, a capacitor C7, and a transistor Q4; the input end of the resistor R16 is connected to the output end of the diode D1, the output end of the resistor R16 is connected to the collector of the transistor Q4, the emitter of the transistor Q4 is respectively connected to the output end of the resistor R18, the output end of the capacitor C7 and the ground end, the base of the transistor Q4 is respectively connected to the input end of the resistor R18, the input end of the capacitor C7, and the output end of the resistor R17, and the input end of the resistor R17 is connected to the output end of the micro-control module; The CP signal wake-up unit includes a resistor R19, an input end of the resistor R19 is connected to an output end of the resistor R2, and an output end of the resistor R19 is connected to an input end of the power management unit; The power management unit is used to manage and control the charging and discharging process between the electric vehicle and the power supply equipment.

10. The signal detection and wake-up circuit according to claim 7, characterized in that: The wake-up module further includes a CC signal wake-up submodule, and the CC signal wake-up submodule includes a CC signal trigger unit and a CC signal wake-up unit; wherein, The CC signal trigger unit includes a Schottky diode D5, a Schottky diode D6, and a resistor R20, the output end of the power supply input module is respectively connected to the cathode of the Schottky diode D5 and the cathode of the Schottky diode D6, the input end of the resistor R20 is respectively connected to the anode of the Schottky diode D5 and the anode of the Schottky diode D6, and the output end of the resistor R20 is connected to the input end of the CC signal wake-up unit; The CC signal wake-up unit includes a voltage regulator tube D7, a capacitor C8, a resistor R21, and a MOS tube Q5. The output end of the resistor R20 is respectively connected to the input end of the voltage regulator tube D7, the output end of the capacitor C8, the output end of the resistor R21, and the gate of the MOS tube Q5. The source of the MOS tube Q5 is respectively connected to the output end of the voltage regulator tube D7, the input end of the capacitor C8, the input end of the resistor R21, and the third output end of the internal power supply. The drain of the MOS tube Q5 is connected to the input end of the power management unit.

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