Signal control circuit and method and vehicle charging device

Abstract

The invention relates to a signal control circuit and method and a vehicle charging device, a signal acquisition module detects a control guide signal transmitted by a controller to generate an acquisition signal, so that the controller outputs an access signal or a disconnection signal according to the acquisition signal, and outputs a signal generation control signal to a signal generation module; the signal generation control signal comprises an enabling control signal and a pulse control signal, so that the charging resistor is disconnected from the signal control circuit through the feedback control module under the condition that the controller outputs a disconnection signal, and the charging resistor is connected to the signal control circuit through the feedback control module under the condition that the controller outputs an access signal; therefore, the signal control circuit can be used as a control guide signal acquisition circuit and can also be used as a control guide signal generation circuit, circuit compatibility is achieved, and the problems of poor circuit compatibility and high cost caused by the fact that an independent separate circuit is adopted for acquisition and generation of control guide signals in the prior art are solved.

Description

Technical Field

[0001] The present application relates to the field of vehicle charging technology, and in particular to a signal control circuit, method and vehicle charging device. Background Art

[0002] With the popularity of electric vehicles, AC charging piles have become an indispensable charging device in daily life. When charging, the charging pile usually generates a control pilot (CP) signal, which communicates with the electric vehicle through the charging cable to ensure smooth charging.

[0003] At present, the AC charging CP signal acquisition circuit and the AC discharging CP signal generation circuit of new energy vehicles are separate independent circuits, and most of the CP signal generation circuits are chip controlled, which is relatively expensive. Summary of the invention

[0004] The present application provides a signal control circuit, method and vehicle charging device to solve the problems of poor circuit compatibility and high cost caused by using independent separate circuits for collecting and generating CP signals in the related art.

[0005] In a first aspect, the present application provides a signal control circuit, including: a signal generation module, a signal acquisition module and a feedback control module;

[0006] The signal acquisition module is used to detect the control guidance signal transmitted by the controller and generate an acquisition signal corresponding to the control guidance signal;

[0007] The controller is used to output a feedback control signal to the feedback control module and a signal generation control signal to the signal generation module according to the acquisition signal, wherein the feedback control signal is divided into a disconnection signal and a connection signal, and the signal generation control signal includes an enable control signal and a pulse control signal;

[0008] The signal generating module is used to output the control guidance signal according to the pulse control signal under the control of the enable control signal;

[0009] The feedback control module includes a charging resistor, and the feedback control module is used to: connect the charging resistor to the signal control circuit according to the connection signal, or disconnect the charging resistor from the signal control circuit according to the disconnection signal.

[0010] Optionally, the acquisition signal includes: a first acquisition signal and a second acquisition signal, the charging resistor includes a first charging resistor and a second charging resistor, and the access signal includes a first access signal and a second access signal;

[0011] The first acquisition signal is used to determine the amplitude of the control guidance signal;

[0012] The second acquisition signal is used to determine the duty cycle of the control guidance signal;

[0013] The controller is specifically configured to: output the first access signal when the amplitude of the control pilot signal reaches a preset first amplitude threshold; output the second access signal when the amplitude of the control pilot signal is within a preset self-test amplitude range; and perform charge and discharge control according to the duty cycle of the control pilot signal when the amplitude of the control pilot signal is within a preset charging amplitude range, wherein the maximum value of the self-test amplitude range is less than the first amplitude threshold, and the minimum value of the self-test amplitude range is greater than the maximum value of the charging amplitude range;

[0014] The feedback control module is specifically used to: connect the first charging resistor to the signal control circuit under the control of the first access signal; and connect the first charging resistor to the signal control circuit under the control of the second access signal.

[0015] Optionally, the signal acquisition module includes: a first diode, a first sampling circuit and a second sampling circuit;

[0016] The anode of the first diode, the signal transmission end of the controller and the output end of the signal generating module are electrically connected, the cathode of the first diode, the first end of the first sampling circuit and the first end of the second sampling circuit are electrically connected, the second end of the first sampling circuit is electrically connected to the first detection end of the controller, and the second end of the second sampling circuit is electrically connected to the second detection end of the controller;

[0017] The signal transmission end of the controller is used to transmit the control guidance signal;

[0018] The second end of the first sampling circuit is used to output the first acquisition signal to the controller;

[0019] The second end of the second sampling circuit is used to output the second sampling signal to the controller.

[0020] Optionally, the first sampling circuit includes: a first amplifier, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a second diode, a third diode, a first capacitor and a second capacitor;

[0021] The first end of the first resistor, the first end of the second sampling circuit and the cathode of the first diode are electrically connected, the second end of the first resistor, the non-inverting input end of the first amplifier and the first end of the second resistor are electrically connected, and the inverting input end of the first amplifier, the output end of the first amplifier and the anode of the second diode are electrically connected;

[0022] A cathode of the second diode, a cathode of the third diode, a first end of the third resistor, and a first end of the fourth resistor are electrically connected;

[0023] The second end of the fourth resistor, the first end of the fifth resistor and the first end of the first capacitor are electrically connected, and the second end of the fifth resistor, the first end of the second capacitor and the first detection end of the controller are electrically connected;

[0024] The second end of the second resistor, the second end of the third resistor, the second end of the first capacitor, the second end of the third capacitor, and the cathode of the third diode are all connected to the reference ground of the signal control circuit.

[0025] Optionally, the second sampling circuit includes: a sixth resistor, a third capacitor and a fourth capacitor;

[0026] The first end of the sixth resistor, the first end of the third capacitor, the first end of the first sampling circuit and the cathode of the first diode are electrically connected, and the second end of the sixth resistor, the second end of the fourth capacitor and the second detection end of the controller are electrically connected.

[0027] Optionally, the signal control circuit further includes: a power supply module;

[0028] The input end of the power supply module is electrically connected to the power supply signal end of the controller, the first output end of the power supply module is electrically connected to the power supply end of the signal acquisition module, the second output end of the power supply module is electrically connected to the power supply end of the signal generating module, and the third output end of the power supply module is electrically connected to the power supply end of the feedback control module.

[0029] Optionally, the signal generating module includes: a first transistor, a second transistor, a third transistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a voltage stabilizing diode and an enabling unit;

[0030] The first end of the enabling unit is electrically connected to the first output end of the controller, the first end of the seventh resistor is electrically connected to the second output end of the controller, the second end of the seventh resistor, the first end of the eleventh resistor and the control end of the first transistor are electrically connected, the first end of the first transistor is electrically connected to the first end of the tenth resistor, and the second end of the first transistor, the second end of the eleventh resistor and the reference ground of the signal control circuit are electrically connected;

[0031] The second end of the tenth resistor, the first end of the ninth resistor, the control end of the second transistor and the control end of the third transistor are electrically connected, the second end of the ninth resistor, the second end of the second transistor and the power supply end of the signal generating module are electrically connected, the first end of the second transistor is electrically connected to the first end of the third transistor, the second end of the third transistor, the first end of the eighth resistor and the second end of the enabling unit are electrically connected, the second end of the eighth resistor, the first end of the voltage stabilizing diode and the signal transmission end of the controller are electrically connected, and the second end of the voltage stabilizing diode is electrically connected to the reference ground;

[0032] The signal transmission end of the controller is used to transmit the control guidance signal, the first output end of the controller is used to output the enable control signal, and the second output end of the controller is used to output the pulse control signal.

[0033] Optionally, the enabling unit includes: a fourth transistor, a twelfth resistor, a thirteenth resistor, and a fourteenth resistor;

[0034] The first end of the twelfth resistor is electrically connected to the first output end of the controller, the second end of the twelfth resistor, the first end of the fourteenth resistor and the control end of the fourth transistor are electrically connected, the first end of the fourth transistor is electrically connected to the first end of the thirteenth resistor, the second end of the thirteenth resistor, the second end of the third transistor and the first end of the eighth resistor are electrically connected, and the second end of the fourth transistor, the second end of the fourteenth resistor and the reference ground of the signal control circuit are electrically connected.

[0035] Optionally, the feedback control module further includes: a fifth transistor, a sixth transistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, and a twentieth resistor;

[0036] The first end of the fifteenth resistor is electrically connected to the power supply end of the feedback control module, and the second end of the fifteenth resistor, the first end of the nineteenth resistor, the first end of the seventh transistor and the control end of the sixth transistor are electrically connected;

[0037] The first end of the sixteenth resistor is electrically connected to the third output end of the controller, the second end of the sixteenth resistor, the first end of the seventeenth resistor, and the control end of the seventh transistor are electrically connected, and the third output end of the controller is used to output the first access signal;

[0038] The first end of the sixth transistor, the second end of the fifth transistor, and the first end of the second charging resistor are electrically connected, the second end of the second charging resistor, the second end of the first charging resistor, the first end of the first sampling circuit, and the first end of the second sampling circuit are electrically connected, the first end of the first charging resistor is electrically connected to the first end of the fifth transistor, the control end of the fifth transistor, the first end of the eighteenth resistor, and the second end of the twentieth resistor are electrically connected, the first end of the twentieth resistor is electrically connected to the fourth output end of the controller, and the fourth output end of the controller is used to output the second access signal;

[0039] The second end of the seventeenth resistor, the second end of the eighteenth resistor, the second end of the nineteenth resistor, the second end of the sixth transistor, the second end of the seventh transistor, and the reference ground of the signal control circuit are electrically connected.

[0040] In a second aspect, the present application provides a signal control method, applied to the signal control circuit as described in any one of the first aspects of the present application, comprising:

[0041] Detecting a control guidance signal transmitted by a controller, and generating a collection signal corresponding to the control guidance signal;

[0042] According to the acquisition signal, a feedback control signal is output to a feedback control module in the signal control circuit, and a signal generation control signal is output to a signal generation module in the signal control circuit, wherein the feedback control signal is divided into a disconnection signal and an access signal, and the signal generation control signal includes an enable control signal and a pulse control signal;

[0043] Through the signal generating module, under the control of the enable control signal, the control guide signal is output according to the pulse control signal;

[0044] The feedback control module includes a charging resistor, the access signal is used to trigger the feedback control module to access the charging resistor to the signal control circuit, and the disconnection signal is used to trigger the feedback control module to disconnect the charging resistor from the signal control circuit.

[0045] In a third aspect, the present application provides a vehicle charging device, comprising: a signal control circuit as described in any one of the above items of the first aspect of the present application.

[0046] The signal control circuit, method and vehicle charging device provided in the embodiments of the present application detect the control guide signal transmitted by the controller through a signal acquisition module, and generate an acquisition signal corresponding to the control guide signal, so that the controller outputs an access signal or a disconnection signal according to the acquisition signal, and outputs an enable control signal and a pulse control signal to the signal generating module, so that the signal generating module can output the control guide signal according to the pulse control signal under the control of the enable control signal to realize the generation of the control guide signal, and when the controller outputs a disconnection signal, the charging resistor can be disconnected from the signal control circuit through the feedback control module, and when the controller outputs a connection signal, the charging resistor can be connected to the signal control circuit through the feedback control module, so that the signal control circuit can be used as a control guide signal generating circuit and also as a control guide signal acquisition circuit, thereby realizing circuit compatibility, and solving the problems of poor circuit compatibility and high cost caused by the use of independent separate circuits for the acquisition and generation of control guide signals in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0048] 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, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0049] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0050] Figure 1 A structural block diagram of a signal control circuit provided in an embodiment of the present application;

[0051] Figure 2 A schematic diagram of the structure of a signal control circuit provided in an optional embodiment of the present application;

[0052] Figure 3 A schematic diagram of a circuit principle of a signal control circuit provided in an optional embodiment of the present application;

[0053] Figure 4 A circuit schematic diagram of a signal control circuit provided as an example of the present application;

[0054] Figure 5A flowchart of a signal control method provided in an embodiment of the present application;

[0055] Figure 6 A structural block diagram of a vehicle charging device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0057] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0058] In order to solve the problems of poor circuit compatibility and high cost caused by the use of independent separate circuits for CP signal acquisition and generation in the related art, the present application provides a signal control circuit, method and vehicle charging device to achieve compatibility between the CP signal acquisition circuit and the CP signal generation circuit, thereby reducing the use of circuit components and reducing costs.

[0059] Figure 1 This is a schematic diagram of the structure of a signal control circuit provided in an embodiment of the present application. Figure 1As shown, the signal control circuit provided by the embodiment of the present application includes: a signal generating module 110, a signal acquisition block 120 and a feedback control module 130; wherein the signal acquisition block 120 is used to detect the control guidance signal transmitted by the controller 140 and generate an acquisition signal corresponding to the control guidance signal; the controller 140 is used to output a feedback control signal to the feedback control module 130 according to the acquisition signal, and output a signal generation control signal to the signal generating module 110, the feedback control signal is divided into a disconnection signal and an access signal, and the signal generation control signal includes an enable control signal and a pulse control signal; the signal generating module 110 is used to output the control guidance signal according to the pulse control signal under the control of the enable control signal; the feedback control module 130 includes a charging resistor, and the feedback control module 130 is used to: connect the charging resistor to the signal control circuit according to the access signal, or disconnect the charging resistor from the signal control circuit according to the disconnection signal.

[0060] In a specific implementation, the signal control circuit provided in the embodiment of the present application detects the control guidance signal transmitted by the controller 140 through the signal acquisition block 120, and generates an acquisition signal corresponding to the control guidance signal, so that the controller 140 can output an access signal or a disconnection signal to the feedback control module 130 according to the acquisition signal, and can output an enable control signal and a pulse control signal to the signal generating module 110, so that the signal generating module 110 can output the control guidance signal according to the pulse control signal under the control of the enable control signal, thereby realizing the output of the control guidance signal, and disconnecting the charging resistor from the signal control circuit according to the disconnection signal through the feedback control module 130, thereby making the signal control circuit serve as a control guidance signal generating circuit, and when the controller 140 outputs an access signal according to the acquisition signal, the charging is connected to the signal control circuit through the feedback control module 130, so that the signal control circuit serves as a CP signal acquisition circuit, such as a CP signal acquisition circuit during AC charging of a new energy vehicle, thereby realizing CP signal acquisition during AC charging of a new energy vehicle.

[0061] Specifically, after receiving the access signal, the feedback control module 130 can connect the charging resistor to the signal control circuit according to the access signal to meet the design requirements of circuit charging, so that the signal control circuit provided in the embodiment of the present application can be used as a CP signal acquisition circuit.

[0062] In addition, after receiving the disconnection signal, the feedback control module 130 in the embodiment of the present application can disconnect the charging resistor from the signal control circuit according to the disconnection signal to avoid the charging resistor affecting the generation of the CP signal during AC discharge, so that the signal control circuit provided in the embodiment of the present application can be used as a CP signal generating circuit, such as a CP signal generating circuit during AC discharge of a new energy vehicle, so that when the new energy vehicle needs AC discharge, a CP signal is generated through the signal control circuit and sent to the CP signal acquisition end of the external device without affecting the CP acquisition of the new energy vehicle, thereby achieving functional independence but circuit compatibility.

[0063] It can be seen that, when the controller 140 outputs an access signal to the feedback control module 130 based on the acquisition signal, the signal control circuit provided in the embodiment of the present application can connect the charging resistor to the signal control circuit through the feedback control module 130 based on the access signal to meet the design requirements of circuit charging, so that the signal control circuit provided in the embodiment of the present application can be used as a CP signal acquisition circuit during AC charging; and when the controller 140 outputs a disconnection signal to the feedback control module 130 based on the acquisition signal, the charging resistor can be disconnected from the signal control circuit through the feedback control module 130, so that the signal control circuit provided in the embodiment of the present application can be used as a CP signal generating circuit during AC discharging, thereby making the CP signal generating circuit and the CP signal acquisition circuit use the same set of circuits to achieve compatibility between the CP signal generating circuit and the CP signal acquisition circuit, thereby solving the problems of poor circuit compatibility and high cost caused by the use of independent separate circuits for the acquisition and generation of CP signals in the related art.

[0064] In a specific implementation, the waveform of the CP signal is usually a pulse width modulation (PWM) waveform. In order to collect the amplitude and duty cycle of the CP signal, two sampling circuits can be designed in the signal acquisition block 120, so that one sampling circuit collects the duty cycle of the CP signal, and the other sampling circuit collects the amplitude of the CP signal. Optionally, the acquisition signal in the embodiment of the present application may include: a first acquisition signal and a second acquisition signal; wherein the first acquisition signal can be used to determine the amplitude of the CP signal, and the second acquisition signal can be used to determine the duty cycle of the CP signal.

[0065] In some optional implementations of the present application, the signal acquisition block 120 includes: a first sampling circuit 121 and a second sampling circuit 122, such as Figure 2As shown; wherein, the first sampling circuit 121 is used to output the first acquisition signal to the controller 140, such as the first sampling circuit 121 can be used to collect the amplitude of the control guide signal, so that the first sampling circuit 121 can output the first acquisition signal to the controller 140 based on the amplitude of the control guide signal, so that the controller 140 can determine the amplitude of the control guide signal according to the first acquisition signal; the second sampling circuit 122 is used to output the second acquisition signal to the controller 140, specifically, the second sampling circuit 122 can collect the control guide signal transmitted by the signal transmission end of the controller 140 to generate a second acquisition signal, and the generated second acquisition signal can be provided to the controller 140, so that the controller 140 can determine the duty cycle of the control guide signal according to the second acquisition signal.

[0066] As an example of this application, Figure 2 As shown, the first end of the first sampling circuit 121, the first end of the second sampling circuit 122, the signal transmission end CP_IN / OUT of the controller 140 and the output end of the signal generating module 110 are electrically connected, and the second end of the first sampling circuit 121 is electrically connected to the first detection end CP_VOL of the controller 140, so as to collect the amplitude of the control pilot signal through the first sampling circuit 121, so that the first sampling circuit 121 can output a first collection signal to the controller 140 based on the amplitude of the control pilot signal, and can collect the control pilot signal through the second sampling circuit 122 to generate a second collection signal, and the second end of the second sampling circuit 122 is electrically connected to the second detection end CPIN of the controller 140, so that the second sampling circuit 122 can output a second collection signal to the controller 140 through the second end of the second sampling circuit 122, so that the controller 140 can determine the duty cycle of the control pilot signal according to the second collection signal. Among them, the signal transmission terminal CP_IN / OUT of the controller 140 is used to transmit the control guide signal; the second end of the first sampling circuit 121 is used to output the first acquisition signal to the controller 140; the second end of the second sampling circuit 122 is used to output the second acquisition signal to the controller 140.

[0067] Of course, the signal acquisition block 120 in the embodiment of the present application may include not only the first sampling circuit 121 and the second sampling circuit 122 , but also other circuit components, such as a diode, etc., which is not limited in the embodiment of the present application.

[0068] Specifically, if Figure 3As shown, in the case where the signal acquisition block 120 includes: a first diode D1, a first sampling circuit 121 and a second sampling circuit 122, the anode of the first diode D1, the signal transmission terminal CP_IN / OUT of the controller 140 and the output terminal of the signal generating module 110 are electrically connected, and the cathode of the first diode D1, the first terminal of the first sampling circuit 121 and the first terminal of the second sampling circuit 122 are electrically connected, so that the controller 140 can determine the amplitude of the control pilot signal according to the first acquisition signal output by the first sampling circuit 121, and can determine the duty cycle of the control pilot signal according to the second acquisition signal output by the second sampling circuit 122.

[0069] As another example of the present application, when the signal acquisition block 120 includes: a first diode D1, a first sampling circuit 121 and a second sampling circuit 122, the anode of the first diode D1, the signal transmission terminal CP_IN / OUT of the controller 140 and the output terminal of the signal generating module 110 are electrically connected, the cathode of the first diode D1, the first end of the first sampling circuit 121 and the first end of the second sampling circuit 122 are electrically connected, the second end of the first sampling circuit 121 is electrically connected to the first detection terminal CP_VOL of the controller 140, so that the first sampling circuit 121 can output a first acquisition signal to the controller 140 based on the control guidance signal transmitted by the signal transmission terminal CP_IN / OUT, and the second end of the second sampling circuit 122 is electrically connected to the second detection terminal CPIN of the controller 140, so that the second sampling circuit 122 can output a second acquisition signal to the controller 140 based on the control guidance signal transmitted by the signal transmission terminal CP_IN / OUT. Among them, the signal transmission terminal CP_IN / OUT of the controller 140 is used to transmit the control guide signal; the second end of the first sampling circuit 121 is used to output the first acquisition signal to the controller 140; the second end of the second sampling circuit 122 is used to output the second acquisition signal to the controller 140.

[0070] It can be seen that the embodiment of the present application can output the first acquisition signal to the controller 140 through the first sampling circuit 121, so that the controller 140 can determine the amplitude of the control guide signal according to the first acquisition signal, and can output the second acquisition signal to the controller 140 through the second sampling circuit 122, so that the controller 140 can determine the duty cycle of the control guide signal according to the second acquisition signal, and then realize charging and discharging control according to the amplitude and duty cycle of the control guide signal.

[0071] Specifically, since the PWM waveform is not a constant voltage signal waveform, in some optional embodiments of the present application, a storage circuit can be set in the first sampling circuit 121 to utilize the voltage signal corresponding to the control guide signal output by the storage circuit as the first acquisition signal, so that the signal control circuit can directly use the ADC sampling port of the MCU as the first detection terminal CP_VOL of the controller 140, and then the amplitude of the control guide signal can be determined by the voltage collected by the ADC sampling port.

[0072] Optionally, the first sampling circuit 121 in the embodiment of the present application includes: a first amplifier OP1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a second diode D2, a third diode D3, a first capacitor C1 and a second capacitor C2; Figure 3 As shown, the first end of the first resistor R1, the first end of the second sampling circuit 122 and the cathode of the first diode D1 are electrically connected, the second end of the first resistor R1, the non-inverting input end of the first amplifier OP1 and the first end of the second resistor R2 are electrically connected, the inverting input end of the first amplifier OP1, the output end of the first amplifier OP1 and the anode of the second diode D2 are electrically connected; the cathode of the second diode D2, the cathode of the third diode D3, the first end of the third resistor R3 and the first end of the fourth resistor R4 are electrically connected; the second end of the fourth resistor R4, the first end of the fifth resistor R5 and the first end of the first capacitor C1 are electrically connected, the second end of the fifth resistor R5, the first end of the second capacitor C2 and the first detection end CP_VOL of the controller 140 are electrically connected; the second end of the second resistor R2, the second end of the third resistor R3, the second end of the first capacitor C1, the second end of the third capacitor and the cathode of the third diode D3 are all connected to the reference ground of the signal control circuit. The first amplifier OP1 functions as a follower, which can reduce the distortion rate of the CP signal by increasing the input impedance and reducing the output impedance, thereby ensuring the reliability of the signal.

[0073] In addition, the energy storage circuit composed of the second diode D2, the third diode D3, the third resistor R3, the fourth resistor R4 and the first capacitor C1 in the embodiment of the present application; when the high level of the PWM signal reaches the output end of the first amplifier OP1, the first capacitor C1 will be charged through the second diode D2 and the fourth resistor R4; when the low level of the PWM signal reaches the output end of OP1, the electric energy stored in the first capacitor C1 will be discharged through the fourth resistor R4 and the third resistor R3; wherein the fourth resistor R4 can be set to a smaller resistor, such as a resistor of hundreds of ohms; the third resistor R3 can be set to a larger resistor, such as a resistor of thousands of ohms, so as to ensure that the CP signal with a low duty cycle can also be collected.

[0074] Optionally, the second sampling circuit 122 in the embodiment of the present application may include: a sixth resistor R6, a third capacitor C3 and a fourth capacitor C4; Figure 3 As shown, the first end of the sixth resistor R6, the first end of the third capacitor C3, the first end of the first sampling circuit 121, and the cathode of the first diode D1 are electrically connected, and the second end of the sixth resistor R6, the second end of the fourth capacitor C4, and the second detection terminal CPIN of the controller 140 are electrically connected, and then the second sampling circuit 122 composed of the sixth resistor R6, the third capacitor C3, and the fourth capacitor C4 can collect the second acquisition signal, so as to determine the frequency and duty cycle of the CP signal through the second acquisition signal. Among them, the second detection terminal CPIN of the controller 140 can be a PWM capture port of the MCU, and the PWM capture port can directly collect the frequency and duty cycle of the CP signal, so that the signal control circuit can directly use the PWM capture port of the MCU for collection, so that the structure of the signal control circuit is simple, and the collected signal is reliable.

[0075] In order to detect the amplitude of the CP signal under different conditions, the feedback control module 130 can generally be connected to access resistors of different resistance values ​​to meet the detection requirements of the CP signal under different states. In some optional embodiments of the present application, the charging resistor in the feedback control module 130 may include a first charging resistor R21 and a second charging resistor R22, and the first charging resistor R21 and the second charging resistor R22 have different access states under different conditions, and the access signal output by the controller 140 to the feedback control module 130 can be divided into a first access signal and a second access signal according to the first charging resistor R21 and the second charging resistor R22, so as to trigger the feedback control module 130 to connect the first charging resistor R21 to the signal control circuit through the first access signal, that is, to control whether the first charging resistor R21 is connected to the signal control loop through the first access signal, and to trigger the feedback control module 130 to connect the second charging resistor R22 to the signal control circuit through the second access signal, that is, to control whether the second charging resistor R22 is connected to the signal control loop through the second access signal, so that the signal control circuit can detect the control guide signal under different circuit states, and then can realize the charge and discharge control based on the control guide signal.

[0076] Specifically, the signal control circuit provided in the embodiment of the present application can determine the amplitude of the control pilot signal through the controller 140 based on the first acquisition signal, and can determine whether the amplitude of the control pilot signal reaches a preset first amplitude threshold, so as to output a first access signal to the feedback control module 130 when the amplitude of the control pilot signal reaches the preset first amplitude threshold, so that the feedback control module 130, under the control of the first access signal, connects the first charging resistor R21 to the signal control circuit, so that the amplitude of the control pilot signal changes, and then it can be determined whether the amplitude of the control pilot signal is within the preset self-test amplitude range, so as to control the feedback control module 130. When the amplitude of the pilot signal is within the preset self-test amplitude range, a second access signal is output, so that the feedback control module 130, under the control of the second access signal, connects the second charging resistor R22 to the access signal control circuit, so that the amplitude of the control pilot signal changes. Subsequently, it is possible to determine whether the charging connection has been completed by judging whether the amplitude of the control pilot signal is within the preset charging amplitude range, so that when the amplitude of the control pilot signal is within the preset charging amplitude range, it is determined that the charging connection has been completed, and the duty cycle of the control pilot signal can be determined according to the second acquisition signal, so that charging and discharging control can be performed according to the duty cycle of the control pilot signal.

[0077] Among them, the controller 140 is specifically used to: output the first access signal when the amplitude of the control guidance signal reaches a preset first amplitude threshold; output the second access signal when the amplitude of the control guidance signal is within a preset self-test amplitude range; when the amplitude of the control guidance signal is within a preset charging amplitude range, perform charging and discharging control according to the duty cycle of the control guidance signal, the maximum value of the self-test amplitude range is less than the first amplitude threshold, and the minimum value of the self-test amplitude range is greater than the maximum value of the charging amplitude range.

[0078] The feedback control module 130 is specifically used to: connect the first charging resistor R21 to the signal control circuit under the control of the first access signal; and connect the first charging resistor R21 to the signal control circuit under the control of the second access signal.

[0079] As an example of the present application, the controller 140 can be used as an electronic control unit (ECU) of a new energy vehicle; when the vehicle is in the wake-up state and needs to be charged by AC, after the gun is plugged in, the ECU needs to detect the CP signal of the charging pile. At this time, the ECU can refer to the charging standard and detect two parameters. The first parameter is the amplitude of the external PWM detected by the first acquisition signal, and the second parameter is the duty cycle of the PWM detected by the second acquisition signal. Specifically, the PWM signal is the CP signal transmitted from the signal transmission terminal CP_IN / OUT of the controller 140; when the gun is not plugged in, the PWM signal is a normally low-level signal; after the gun is plugged in, the PWM signal is connected to the system, but at this time the charging pile end will set the PWM signal to a 12V normally high-level signal. At this time, the amplitude of the control guidance signal can be determined according to the first acquisition signal detected by the first detection end CP_VOL to reach the preset first amplitude threshold, and then the first access signal can be output, so that the feedback control module 130, under the control of the first access signal, connects the first charging resistor R21 to the loop of the signal control circuit; after the gun connection is completed, due to the first charging resistor R2 1 access loop, the voltage amplitude of the signal transmission terminal CP_IN / OUT will become about 9V, at this time the vehicle end will perform a self-check of the charging status, and the MCU will determine whether it can enter the charging state. If it can enter the charging state, it will output a second access signal, so that the feedback control module 130, under the control of the second access signal, connects the second charging resistor R22 to the loop of the signal control circuit. At this time, the voltage amplitude of the signal transmission terminal CP_IN / OUT will become about 6V, and the charging pile will know that the gun insertion is completed. Then the PWM signal can be controlled to switch from 12V normal power to a normal PWM signal, such as outputting a PWM signal at 1000hz, and the duty cycle of the PWM signal is determined by the charging pile end.

[0080] In a specific implementation, the resistance value of the first charging resistor R21 and the resistance value of the second charging resistor R22 can be set according to the charging requirements. For example, the resistance value of the first charging resistor R21 can be 2.7 kilo-ohms, and the resistance value of the second charging resistor R22 can be 1.3 kilo-ohms. The embodiment of the present application does not impose any specific restrictions on this.

[0081] In addition, the preset first amplitude threshold, the maximum value of the self-test amplitude range, the minimum value of the self-test amplitude range, and the maximum value of the charging amplitude range can be set according to the charging detection requirements, and the embodiments of the present application are not limited to this. For example, according to the charging standard, based on the charging logic, the voltage amplitude of 12V can be set as the preset first amplitude threshold, the voltage amplitude of 9.5V can be set as the maximum value of the self-test amplitude range, and the voltage amplitude of 8.5V can be set as the minimum value of the self-test amplitude range, so that the voltage amplitude range of about 9V is set as the self-test amplitude range, and the self-test amplitude range refers to the amplitude range in the self-test state, and the voltage amplitude of 6.5V can be set as the maximum value of the charging amplitude range, and the voltage amplitude of 5.5V can be set as the minimum value of the charging amplitude range, so that the voltage amplitude range of about 6V can be set as the charging amplitude range, and the charging amplitude range refers to the amplitude range in the charging state.

[0082] In some optional embodiments of the present application, the signal control circuit may include other circuit modules in addition to the signal generating module 110, the signal acquisition block 120 and the feedback control module 130, such as a power supply module, to perform power conversion through the power supply module, output a target power supply signal, and power the signal generating module 110, the signal acquisition block 120 and the feedback control module 130.

[0083] Optionally, the signal control circuit provided in the embodiment of the present application further includes: a power supply module, which is used to convert the power supply signal of the controller 140 and output a target power supply signal to power the signal generation module 110, the signal acquisition block 120 and the feedback control module 130 through the target power supply signal. Figure 4 As shown, the input end of the power supply module is electrically connected to the power supply signal end KL30 of the controller 140, the first output end POWER_5V of the power supply module is electrically connected to the power supply end of the signal acquisition block 120, the second output end POWER_12V of the power supply module is electrically connected to the power supply end of the signal generating module 110, and the third output end SLP_5V of the power supply module is electrically connected to the power supply end of the feedback control module 130, so that the signal control circuit can perform power conversion through the power supply module based on the power supply signal provided by the power supply signal end KL30, and output the target power supply signal to power the signal generating module 110, the signal acquisition block 120 and the feedback control module 130 through the target power supply signal.

[0084] In an optional embodiment of the present application, the power common signal output by the power supply module can be divided into a first power supply signal, a second power supply signal and a third power supply signal, so that the signal acquisition block 120 is powered by the first power supply signal, the signal generating module 110 is powered by the second power supply signal, and the feedback control module 130 is powered by the third power supply signal. Specifically, the input end of the power supply module is electrically connected to the power supply signal end KL30 of the controller 140, and the power supply signal end KL30 of the controller 140 is used to provide the power supply signal of the controller 140, so as to convert the power supply signal of the controller 140 through the power supply module and output the target power supply signal, and the first output end POWER_5V of the power supply module is electrically connected to the power supply end of the signal acquisition block 120, so as to output the first power supply signal through the first output end POWER_5V of the power supply module to power the signal acquisition block 120, the second output end POWER_12V of the power supply module is electrically connected to the power supply end of the signal generating module 110, so as to output the second power supply signal through the second output end POWER_12V of the power supply module to power the signal generating module 110, and the third output end SLP_5V of the power supply module is electrically connected to the power supply end of the feedback control module 130, so as to output the third power supply signal through the third output end SLP_5V of the power supply module to power the feedback control module 130.

[0085] For example, in the case where the signal control circuit provided in the embodiment of the present application is applied to the AC charging and discharging scenario of a new energy vehicle, the power supply signal terminal KL30 of the controller 140 can be connected to the positive electrode of a small battery on the whole vehicle, so that the 12V power supply signal provided by the positive electrode of the small battery can be used as the power supply signal of the controller 140, so that the power supply module can output the first power supply signal, the second power supply signal and the third power supply signal based on the power supply signal; wherein the first power supply signal can be used as a 5V power supply of the board, and the stable voltage provided by the first output terminal POWER_5V of the power supply module, such as in the sleep state, the voltage of the first power supply signal The voltage of the first power supply signal is 0V, while in the awake state, the voltage of the first power supply signal is 5V; the second power supply signal can be used as the board 12V power supply, and the stable voltage is provided by the second output terminal POWER_12V of the power supply module. In the sleep state, the voltage of the second power supply signal is 0V, while in the awake state, the voltage of the second power supply signal is 12V; the third power supply signal can be used as the board 5V power supply, and the stable voltage is provided by the third output terminal SLP_5V of the power supply module. In the sleep state, the voltage of the third power supply signal is 0V, while in the awake state, the voltage of the third power supply signal is 5V.

[0086] In the specific implementation, the voltage of the positive electrode of the small battery is the normal voltage, which can supply power to the power supply signal end of the ECU in both the sleep state and the wake-up state, so that the power supply module can be used as the internal power conversion and monitoring module of the ECU, and can convert the power supply signal into the stable power supply required in the board. The stable power supply can include but is not limited to 12V power supply, 5V power supply, etc.

[0087] When in sleep mode, the power supply module can turn off other power supplies except the third output terminal SLP_5V, disconnect the power supply of the microcontroller unit (MCU), and put the ECU into sleep mode. Only the third output terminal SLP_5V will always output the third power supply signal of 5V for power supply; when awakened, the power supply module can turn on the power supplies of the first output signal terminal POWER_5V, the second output signal terminal POWER_12V and the third output signal terminal SLP_5V, so as to output the first power supply signal, the second power supply signal and the third power supply signal through the first output signal terminal POWER_5V, the second output signal terminal POWER_12V and the third output signal terminal SLP_5V respectively, so as to power the signal acquisition block 120, the signal generation module 110 and the feedback detection module.

[0088] For example, when the vehicle is in the wake-up state and needs to be charged with AC, after the gun is plugged in, the ECU needs to detect the CP signal of the charging pile. At this time, the ECU can refer to the charging standard and detect two parameters. The first parameter is the amplitude of the external PWM detected by the first acquisition signal, and the second parameter is the duty cycle of the PWM detected by the second acquisition signal. Specifically, the PWM signal is the CP signal transmitted from the signal transmission terminal CP_IN / OUT of the controller 140; when the gun is not plugged in, the PWM signal is a normally low-level signal; after the gun is plugged in, the PWM signal is connected to the system, but at this time the charging pile end will set the PWM signal to a 12V normally high-level signal. At this time, it can be determined according to the first acquisition signal detected by the first detection terminal CP_VOL that the amplitude of the control guidance signal reaches the preset first amplitude threshold, and then the first access signal can be output, so that the feedback control module 130, under the control of the first access signal, connects the first charging resistor R21 to the loop of the signal control circuit; after the gun is connected, due to the first charging resistor R2 1 access loop, the voltage amplitude of the signal transmission terminal CP_IN / OUT will become about 9V, at this time the vehicle end will perform a self-check of the charging status, and the MCU will determine whether it can enter the charging state. If it can enter the charging state, it will output a second access signal, so that the feedback control module 130, under the control of the second access signal, connects the second charging resistor R22 to the loop of the signal control circuit. At this time, the voltage amplitude of the signal transmission terminal CP_IN / OUT will become about 6V, and the charging pile will know that the gun insertion is completed. Then the PWM signal can be controlled to switch from 12V normal power to a normal PWM signal, such as outputting a PWM signal at 1000hz, and the duty cycle of the PWM signal is determined by the charging pile end.

[0089] In an optional implementation of the present application, the signal generation module 110 can be divided into a signal generation unit 111 and an enabling unit 112. Figure 3As shown, the first end of the enabling unit 112 is electrically connected to the first output end EN of the controller 140, the second end of the enabling unit 112 is electrically connected to the second end of the signal generating unit 111, the first end of the signal generating unit 111 is electrically connected to the second output end CP_TT of the controller 140, the output end of the signal generating unit 111, the acquisition input end of the signal acquisition block 120 and the signal transmission end CP_IN / OUT of the controller 140 are electrically connected, so that after receiving the enable control signal, the enabling unit 112 can trigger the signal generating unit 111 to output the control guide signal according to the pulse control signal according to the enable control signal. Among them, the signal transmission end CP_IN / OUT of the controller 140 is used to transmit the control guide signal, the first output end EN of the controller 140 is used to output the enable control signal, and the second output end CP_TT of the controller 140 is used to output the pulse control signal.

[0090] In a specific implementation, the controller 140 can output a valid enable control signal to the enabling unit 112 through the first output terminal EN, so that the enabling unit 112 is under the control of the valid enable control signal, and the trigger signal generating unit 111 is under the control of the valid pulse control signal, and the control guide signal is output based on the second power supply signal provided by the power supply module.

[0091] In some optional embodiments of the present application, the signal generating module 110 may include: a first transistor Q1, a second transistor Q2, a third transistor Q3, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a voltage stabilizing diode DE, and an enabling unit 112, so that the signal generating unit 111 is formed by the first transistor Q1, the second transistor Q2, the third transistor Q3, the seventh resistor R7, the eighth resistor R8, the ninth resistor R9, the tenth resistor R10, the eleventh resistor R11, and the voltage stabilizing diode DE, so that the signal generating unit 111 can generate a control guide signal under the triggering of the pulse control signal. Figure 4As shown, the first end of the enabling unit 112 is electrically connected to the first output end EN of the controller 140, the first end of the seventh resistor R7 is electrically connected to the second output end CP_TT of the controller 140, the second end of the seventh resistor R7, the first end of the eleventh resistor R11 and the control end of the first transistor Q1 are electrically connected, the first end of the first transistor Q1 is electrically connected to the first end of the tenth resistor R10, the second end of the first transistor Q1, the second end of the eleventh resistor R11 and the reference ground of the signal control circuit are electrically connected; the second end of the tenth resistor R10, the first end of the ninth resistor R9, the first end of the ninth resistor R10 and the control end of the first transistor Q1 are electrically connected. The control end of the second transistor Q2 and the control end of the third transistor Q3 are electrically connected, the second end of the ninth resistor R9, the second end of the second transistor Q2 and the power supply end of the signal generating block 110 are electrically connected, the first end of the second transistor Q2 is electrically connected to the first end of the third transistor Q3, the second end of the third transistor Q3, the first end of the eighth resistor R8 and the second end of the enabling unit 112 are electrically connected, the second end of the eighth resistor R8, the first end of the Zener diode DE and the signal transmission end CP_IN / OUT of the controller 140 are electrically connected, and the second end of the Zener diode DE is electrically connected to the reference ground.

[0092] Optionally, the enabling unit 112 in the embodiment of the present application may include: a fourth transistor Q4, a twelfth resistor R12, a thirteenth resistor R13, and a fourteenth resistor R14; the first end of the twelfth resistor R12 is electrically connected to the first output end EN of the controller 140, the second end of the twelfth resistor R12, the first end of the fourteenth resistor R14, and the control end of the fourth transistor Q4 are electrically connected, the first end of the fourth transistor Q4 is electrically connected to the first end of the thirteenth resistor R13, the second end of the thirteenth resistor R13, the second end of the third transistor Q3, and the first end of the eighth resistor R8 are electrically connected, and the second end of the fourth transistor Q4, the second end of the fourteenth resistor R14, and the reference ground of the signal control circuit are electrically connected.

[0093] As an example of the present application, taking the first transistor Q1 and the fourth transistor Q4 both using NMOS as an example, when the vehicle needs AC discharge, the level signal of the first output terminal EN of the controller 140 can be set to a high-level signal through the ECU, so that the high-level signal can be used as a valid enable control signal, so that the fourth transistor Q4 can be turned on through the effective enable control signal to enable the CP signal output. Specifically, while the level signal of the first output terminal EN of the controller 140 is set to a high-level signal, the second output terminal CP_TT of the controller 140 can output a PWM signal as a pulse control signal, so as to control the on and off of Q1 through the pulse control signal, thereby controlling the on and off of the second transistor Q2 and the third transistor Q3, and then outputting a PWM signal with an amplitude of 12V as the control guide signal required to be sent by the vehicle, thereby realizing the generation of the CP signal. Among them, the frequency and duty cycle of the CP signal are controlled by the CPWM signal output by the second output terminal CP_TT of the controller 140.

[0094] When there is no need to output the CP signal, the second output terminal CP_TT of the controller 140 and the first output terminal EN of the controller 140 are maintained as low-level signals. At this time, the second transistor Q2, the third transistor Q3 and the fourth transistor Q4 are all in a closed state. The second transistor Q2 can prevent the voltage coming from the signal transmission terminal CP_IN / OUT from flowing back into the second output terminal POWER_12V of the power supply module, thereby preventing the power supply module from being damaged, thereby protecting the circuit. For example, when the vehicle is in the wake-up state and needs to be charged by AC, the level signal of the first output terminal EN of the controller 140 and the level signal set at the second output terminal CP_TT of the controller 140 can be set to a low level signal through the ECU, so that the first transistor Q1 and the fourth transistor Q4 are in the off state, and at this time the first end of the tenth resistor R10 is equivalent to being suspended, so that the gate voltage of the second transistor Q2 and the third transistor Q3 will be pulled to the voltage provided by the second power supply signal, and due to the existence of the integrated diode of the second transistor Q2, the source voltage of the second transistor Q2 will be pulled to the voltage provided by the second power supply signal, so the gate voltage of the second transistor Q2 is approximately equal to the source voltage, so that the second transistor Q2 is disconnected, and the gate voltage of the third transistor Q3 is equal to the source voltage of the third transistor Q3, so the third transistor Q3 is disconnected. The CP signal transmitted by the signal transmission terminal CP_IN / OUT cannot be transmitted to the signal generation module 110, and can only be transmitted to the signal acquisition block 120 and the feedback control module 130 through the first diode D1, and then the CP signal can be collected through the first sampling circuit 121 and the second sampling circuit in the signal acquisition block 120.

[0095] In a specific implementation, the feedback control module 130 may include other circuit components, such as resistors, transistors, etc., in addition to the first charging resistor R21 and the second charging resistor R22. The embodiment of the present application does not impose any specific limitation on this.

[0096] Optionally, the feedback control module 130 in some optional embodiments of the present application further includes: a fifth transistor Q5, a sixth transistor Q6, a seventh transistor Q7, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, and a twentieth resistor R20; Figure 3 As shown, the first end of the fifteenth resistor R15 is electrically connected to the power supply end of the feedback control module 130 and the third output end SLP_5V of the power supply module, the second end of the fifteenth resistor R15, the first end of the nineteenth resistor R19, the first end of the seventh transistor and the control end of the sixth transistor Q6 are electrically connected; the first end of the sixteenth resistor R16 is electrically connected to the third output end CP_Res of the controller 140, the second end of the sixteenth resistor R16, the first end of the seventeenth resistor R17, and the control end of the seventh transistor Q7 are electrically connected, and the third output end CP_Res of the controller 140 is used to output the first access signal or the disconnection signal; the first end of the sixth transistor Q6, the second end of the fifth transistor Q5 and the first end of the second charging resistor R22 are electrically connected, and the second charging resistor The second end of R22, the second end of the first charging resistor R21, the first end of the first sampling circuit 121 and the first end of the second sampling circuit 122 are electrically connected, the first end of the first charging resistor R21 is electrically connected to the first end of the fifth transistor Q5, the control end of the fifth transistor Q5, the first end of the eighteenth resistor R18 and the second end of the twentieth resistor R20 are electrically connected, the first end of the twentieth resistor R20 is electrically connected to the fourth output end CP_1K3 of the controller 140, and the fourth output end CP_1K3 of the controller 140 is used to output the second access signal; the second end of the seventeenth resistor R17, the second end of the eighteenth resistor R18, the second end of the nineteenth resistor R19, the second end of the sixth transistor Q6, the second end of the seventh transistor and the reference ground of the signal control circuit are electrically connected.

[0097] In some optional embodiments of the present application, the third output terminal CP_Res of the controller 140 can output a high-level signal as a valid disconnection signal, so that the feedback control module 130 controls the seventh transistor Q7 to turn on according to the disconnection signal, so as to pull down the gate voltage of the sixth transistor Q6 through the turned-on seventh transistor Q7, so that the sixth transistor Q6 is disconnected, thereby making the lower end of the first charging resistor R21 in a suspended state, and then the first charging resistor R21 and the second charging resistor R22 can be disconnected from the loop of the signal control circuit.

[0098] For example, when the vehicle needs AC discharge, the vehicle needs to send a CP signal. At this time, the discharging vehicle is equivalent to a charging pile. The level signal of the third output terminal CP_Res of the controller 140 can be set to a high level signal through the MCU, and transmitted to the feedback control module 130 as an effective disconnection signal, so that the seventh transistor Q7 is turned on to pull the upper end voltage of the nineteenth resistor R19 to the ground. At this time, the gate voltage and source voltage of the sixth transistor Q6 are agreed to be 0V voltage of the reference ground, so the sixth transistor Q6 is disconnected, so that the lower end of the first charging resistor R21 is in a suspended state, and then the first charging resistor R21 and the second charging resistor R22 are disconnected from the loop of the signal control circuit, thereby avoiding the first charging resistor R21 and the second charging resistor R22 in the discharging vehicle from being connected in parallel with the first charging resistor R21 and the second charging resistor R22 at the charging vehicle end, affecting the CP signal.

[0099] In addition, in the case where the signal control circuit in the embodiment of the present application is used as the control circuit of the charging end, if the first charging resistor R21 is set to a 2.7 kilo-ohm resistor and the second charging resistor R22 is set to a 1.3 kilo-ohm resistor, the first charging resistor R21 is used as a charging resistor that needs to be normally grounded. The third power supply signal output by the third output terminal SLP_5V of the power supply module can be used as a first access signal, which is transmitted to the gate of the sixth transistor Q6 through the fifteenth resistor R15 to keep the sixth transistor Q6 turned on at all times, so as to connect the first charging resistor R21 to the reference ground of the signal control circuit.

[0100] The fourth output terminal CP_1K3 of the controller 140 can output a high-level signal as a valid second access signal to connect the second access resistor to the loop through the valid second access signal. The resistance value of the second access resistor can be set according to the charging standard, such as setting a 1.3 kilo-ohm resistor as the second access resistor. During AC charging, if the vehicle end is ready, the ECU controls the third output terminal CP_Re of the controller 140 to output a high-level signal as a valid second access signal, which is transmitted to the control end of the fifth transistor Q5 through the twentieth resistor R20, thereby controlling the fifth transistor Q5 to be turned on, so as to connect the second access resistor to the loop through the turned-on fifth transistor Q5, thereby meeting the charging setting requirements.

[0101] In summary, the signal control circuit provided in the embodiment of the present application includes a signal generating module 110, a signal acquisition block 120 and a feedback control module 130, and the feedback control module 130 includes a charging resistor, and the signal acquisition block 120 detects the control guidance signal transmitted by the controller 140, and generates an acquisition signal corresponding to the control guidance signal, so that the controller 140 can output an access signal or a disconnection signal to the feedback control module 130 according to the acquisition signal, and can output an enable control signal and a pulse control signal to the signal generating module 110, so that the signal generating module 110 can output the control guidance signal according to the pulse control signal under the control of the enable control signal, thereby realizing the generation of the control guidance signal, and thus the signal control circuit provided in the embodiment of the present application can be used as a control guidance signal generating circuit, and can also be used as a control guidance signal acquisition circuit, such as in the controller When controller 140 outputs an access signal to the feedback control module 130 according to the acquisition signal, the charging resistor can be connected to the signal control circuit through the feedback control module 130 according to the access signal to meet the design requirements of circuit charging, so that the signal control circuit provided in the embodiment of the present application can be used as a CP signal acquisition circuit, and when controller 140 outputs a disconnection signal to the feedback control module 130 according to the acquisition signal, the charging resistor can be disconnected from the signal control circuit through the feedback control module 130 disconnection signal to avoid the charging resistor being connected in parallel with the charging resistor at the charging end during AC discharge and affecting the acquisition of the CP signal, thereby making the signal control circuit a control guide signal acquisition circuit to achieve circuit compatibility, thereby solving the problems of poor circuit compatibility and high cost caused by the use of independent separate circuits for the acquisition and generation of the control guide signal in the related art.

[0102] See also Figure 5 , shows a flow chart of steps of a signal control method provided in an embodiment of the present application. The signal control method provided in an embodiment of the present application can be applied to the signal control circuit described in any embodiment of the present application, such as Figure 5As shown, the signal control method includes the following steps:

[0103] Step 510, detecting a control guidance signal transmitted by a controller, and generating a collection signal corresponding to the control guidance signal;

[0104] Step 520: output a feedback control signal to the feedback control module in the signal control circuit according to the acquisition signal, and output a signal generation control signal to the signal generation module, wherein the feedback control signal is divided into a disconnection signal and an access signal, and the signal generation control signal includes an enable control signal and a pulse control signal;

[0105] Step 530, outputting the control guidance signal according to the pulse control signal through the signal generating module under the control of the enable control signal;

[0106] The feedback control module includes a charging resistor, the access signal is used to trigger the feedback control module to access the charging resistor to the signal control circuit, and the disconnection signal is used to trigger the feedback control module to disconnect the charging resistor from the signal control circuit.

[0107] It can be seen that the embodiment of the present application generates an acquisition signal corresponding to the control guide signal by detecting the control guide signal transmitted by the controller, and then outputs a feedback control signal to the feedback control module in the signal control circuit according to the acquisition signal, and outputs a signal generation control signal to the signal generating module, wherein the signal generation control signal includes an enable control signal and a pulse control signal, so that the signal generating module can output the control guide signal according to the pulse control signal under the control of the enable control signal to realize the generation of the control guide signal, and when the controller outputs a disconnect signal, the charging resistor can be disconnected from the signal control circuit through the feedback control module, and when the controller outputs a connection signal, the charging resistor can be connected to the signal control circuit through the feedback control module, thereby making the signal control circuit serve as both a control guide signal generating circuit and a control guide signal acquisition circuit, thereby realizing circuit compatibility, and solving the problems of poor circuit compatibility and high cost caused by the use of independent separate circuits for the acquisition and generation of the control guide signal in the related art.

[0108] See also Figure 6, shows a result block diagram of a vehicle charging device provided by an embodiment of the present application. The vehicle charging device 601 provided by the embodiment of the present application may include a signal control circuit 602, and the signal control circuit 602 includes the signal control circuit described in any embodiment of the present application, so that the vehicle charging device 601 can detect the control guide signal transmitted by the controller through the signal acquisition module, generate an acquisition signal corresponding to the control guide signal, so that the controller outputs an access signal or a disconnection signal according to the acquisition signal, and outputs an enable control signal and a pulse control signal to the signal generation module, so that the signal generation module can output the control guide signal according to the pulse control signal under the control of the enable control signal to achieve the generation of the control guide signal, and when the controller outputs a disconnection signal, the charging resistor can be disconnected from the signal control circuit through the feedback control module, and when the controller outputs a connection signal, the charging is connected to the signal control circuit through the feedback control module, so that the signal control circuit can be used as a control guide signal generation circuit, and can also be used as a control guide signal acquisition circuit, so as to achieve circuit compatibility, and solve the problem of poor circuit compatibility and high cost caused by the independent separation of the acquisition and generation of the control guide signal in the related art.

[0109] The above described method and device embodiments are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0110] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a general hardware platform, and of course, by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the relevant technology can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0111] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0112] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A signal control circuit, characterized in that: include: Signal generation module, signal acquisition module and feedback control module; The signal acquisition module is used to detect the control guidance signal transmitted by the controller and generate an acquisition signal corresponding to the control guidance signal; The controller is used to output a feedback control signal to the feedback control module and a signal generation control signal to the signal generation module according to the acquisition signal, wherein the feedback control signal is divided into a disconnection signal and a connection signal, and the signal generation control signal includes an enable control signal and a pulse control signal; The signal generating module is used to output the control guidance signal according to the pulse control signal under the control of the enable control signal; The feedback control module includes a charging resistor, and the feedback control module is used to: connect the charging resistor to the signal control circuit according to the connection signal, or disconnect the charging resistor from the signal control circuit according to the disconnection signal.

2. The signal control circuit according to claim 1, characterized in that: The acquisition signal includes: a first acquisition signal and a second acquisition signal, the charging resistor includes a first charging resistor and a second charging resistor, and the access signal includes a first access signal and a second access signal; The first acquisition signal is used to determine the amplitude of the control guidance signal; The second acquisition signal is used to determine the duty cycle of the control guidance signal; The controller is specifically configured to: output the first access signal when the amplitude of the control guide signal reaches a preset first amplitude threshold; output the second access signal when the amplitude of the control guide signal is within a preset self-test amplitude range; When the amplitude of the control pilot signal is within a preset charging amplitude range, charging and discharging control is performed according to the duty cycle of the control pilot signal, the maximum value of the self-checking amplitude range is less than the first amplitude threshold, and the minimum value of the self-checking amplitude range is greater than the maximum value of the charging amplitude range; The feedback control module is specifically used to: connect the first charging resistor to the signal control circuit under the control of the first access signal; and connect the first charging resistor to the signal control circuit under the control of the second access signal.

3. The signal control circuit according to claim 2, characterized in that: The signal acquisition module comprises: a first diode, a first sampling circuit and a second sampling circuit; The anode of the first diode, the signal transmission end of the controller and the output end of the signal generating module are electrically connected, the cathode of the first diode, the first end of the first sampling circuit and the first end of the second sampling circuit are electrically connected, the second end of the first sampling circuit is electrically connected to the first detection end of the controller, and the second end of the second sampling circuit is electrically connected to the second detection end of the controller; The signal transmission end of the controller is used to transmit the control guidance signal; The second end of the first sampling circuit is used to output the first acquisition signal to the controller; The second end of the second sampling circuit is used to output the second sampling signal to the controller.

4. The signal control circuit according to claim 3, characterized in that: The first sampling circuit comprises: a first amplifier, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a second diode, a third diode, a first capacitor and a second capacitor; The first end of the first resistor, the first end of the second sampling circuit and the cathode of the first diode are electrically connected, the second end of the first resistor, the non-inverting input end of the first amplifier and the first end of the second resistor are electrically connected, and the inverting input end of the first amplifier, the output end of the first amplifier and the anode of the second diode are electrically connected; A cathode of the second diode, a cathode of the third diode, a first end of the third resistor, and a first end of the fourth resistor are electrically connected; The second end of the fourth resistor, the first end of the fifth resistor and the first end of the first capacitor are electrically connected, and the second end of the fifth resistor, the first end of the second capacitor and the first detection end of the controller are electrically connected; The second end of the second resistor, the second end of the third resistor, the second end of the first capacitor, the second end of the third capacitor, and the cathode of the third diode are all connected to the reference ground of the signal control circuit.

5. The signal control circuit according to claim 3, characterized in that: The second sampling circuit comprises: a sixth resistor, a third capacitor and a fourth capacitor; The first end of the sixth resistor, the first end of the third capacitor, the first end of the first sampling circuit and the cathode of the first diode are electrically connected, and the second end of the sixth resistor, the second end of the fourth capacitor and the second detection end of the controller are electrically connected.

6. The signal control circuit according to any one of claims 1 to 5, characterized in that: Also includes: Power supply module; The input end of the power supply module is electrically connected to the power supply signal end of the controller, the first output end of the power supply module is electrically connected to the power supply end of the signal acquisition module, the second output end of the power supply module is electrically connected to the power supply end of the signal generating module, and the third output end of the power supply module is electrically connected to the power supply end of the feedback control module.

7. The signal control circuit according to any one of claims 1 to 5, characterized in that: The signal generating module comprises: a first transistor, a second transistor, a third transistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a voltage stabilizing diode and an enabling unit; The first end of the enabling unit is electrically connected to the first output end of the controller, the first end of the seventh resistor is electrically connected to the second output end of the controller, the second end of the seventh resistor, the first end of the eleventh resistor and the control end of the first transistor are electrically connected, the first end of the first transistor is electrically connected to the first end of the tenth resistor, and the second end of the first transistor, the second end of the eleventh resistor and the reference ground of the signal control circuit are electrically connected; The second end of the tenth resistor, the first end of the ninth resistor, the control end of the second transistor and the control end of the third transistor are electrically connected, the second end of the ninth resistor, the second end of the second transistor and the power supply end of the signal generating module are electrically connected, the first end of the second transistor is electrically connected to the first end of the third transistor, the second end of the third transistor, the first end of the eighth resistor and the second end of the enabling unit are electrically connected, the second end of the eighth resistor, the first end of the voltage stabilizing diode and the signal transmission end of the controller are electrically connected, and the second end of the voltage stabilizing diode is electrically connected to the reference ground; The signal transmission end of the controller is used to transmit the control guidance signal, the first output end of the controller is used to output the enable control signal, and the second output end of the controller is used to output the pulse control signal.

8. The signal control circuit according to claim 7, characterized in that: The enabling unit comprises: a fourth transistor, a twelfth resistor, a thirteenth resistor, and a fourteenth resistor; The first end of the twelfth resistor is electrically connected to the first output end of the controller, the second end of the twelfth resistor, the first end of the fourteenth resistor and the control end of the fourth transistor are electrically connected, the first end of the fourth transistor is electrically connected to the first end of the thirteenth resistor, the second end of the thirteenth resistor, the second end of the third transistor and the first end of the eighth resistor are electrically connected, and the second end of the fourth transistor, the second end of the fourteenth resistor and the reference ground of the signal control circuit are electrically connected.

9. The signal control circuit according to any one of claims 2 to 5, characterized in that: The feedback control module further includes: a fifth transistor, a sixth transistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, and a twentieth resistor; The first end of the fifteenth resistor is electrically connected to the power supply end of the feedback control module, and the second end of the fifteenth resistor, the first end of the nineteenth resistor, the first end of the seventh transistor and the control end of the sixth transistor are electrically connected; The first end of the sixteenth resistor is electrically connected to the third output end of the controller, the second end of the sixteenth resistor, the first end of the seventeenth resistor, and the control end of the seventh transistor are electrically connected, and the third output end of the controller is used to output the first access signal; The first end of the sixth transistor, the second end of the fifth transistor, and the first end of the second charging resistor are electrically connected, the second end of the second charging resistor, the second end of the first charging resistor, the first end of the first sampling circuit, and the first end of the second sampling circuit are electrically connected, the first end of the first charging resistor is electrically connected to the first end of the fifth transistor, the control end of the fifth transistor, the first end of the eighteenth resistor, and the second end of the twentieth resistor are electrically connected, the first end of the twentieth resistor is electrically connected to the fourth output end of the controller, and the fourth output end of the controller is used to output the second access signal; The second end of the seventeenth resistor, the second end of the eighteenth resistor, the second end of the nineteenth resistor, the second end of the sixth transistor, the second end of the seventh transistor, and the reference ground of the signal control circuit are electrically connected.

10. A signal control method, characterized in that: A signal control circuit as claimed in any one of claims 1 to 9, comprising: Detecting a control guidance signal transmitted by a controller, and generating a collection signal corresponding to the control guidance signal; According to the acquisition signal, a feedback control signal is output to a feedback control module in the signal control circuit, and a signal generation control signal is output to a signal generation module in the signal control circuit, wherein the feedback control signal is divided into a disconnection signal and an access signal, and the signal generation control signal includes an enable control signal and a pulse control signal; Through the signal generating module, under the control of the enable control signal, the control guide signal is output according to the pulse control signal; The feedback control module includes a charging resistor, the access signal is used to trigger the feedback control module to access the charging resistor to the signal control circuit, and the disconnection signal is used to trigger the feedback control module to disconnect the charging resistor from the signal control circuit.

11. A vehicle charging device, characterized in that: The vehicle charging device comprises a signal control circuit as described in any one of claims 1-9.

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