Charging and discharging control guide generation method and system

Abstract

The application discloses a kind of charging and discharging control guide generation method and system.Therein, the method includes: using signal receiving end to receive the first pulse width modulation signal sent by charging pile, wherein the first pulse width modulation signal is voltage signal, and high-low level changes according to predetermined duty cycle;Using non-current triggered control circuit to signal conversion to the first pulse width modulation signal, obtain the second pulse width modulation signal, wherein the voltage amplitude range of the first pulse width modulation signal is less than the voltage amplitude range of the second pulse width modulation signal;Using signal detection module to detect whether the second pulse width modulation signal output by non-current triggered control circuit matches predetermined signal amplitude range, in the case where the second pulse width modulation signal matches predetermined signal amplitude range, determine that vehicle end and charging pile interaction is completed.The application solves the technical problem that the waveform generated by current triggered control current in related technology is not ideal, which is not conducive to pile end and vehicle end waveform acquisition and judgment.

Description

Technical Field

[0001] This invention relates to the field of charge and discharge technology, and more specifically, to a charge and discharge control guidance generation method and system. Background Technology

[0002] In AC charging equipment, the CP signal, short for Control Pilot Function, is primarily used to monitor the interaction between the electric vehicle and its power supply equipment (i.e., the charging station). The control pilot signal of AC charging equipment typically uses a 1kHz (kilohertz) PWM signal source and its duty cycle to express the maximum supply current Imax that the device can currently provide. The CP control pilot signal plays a crucial role in AC charging stations, effectively monitoring and controlling the charging process to ensure charging safety and efficiency.

[0003] The CP control guidance signal generated by the current-triggered control circuit in the related technology has a long rise and fall time, which makes the waveform have poor anti-interference ability and the final generated PWM signal is not accurate enough, which is not conducive to the acquisition and judgment of waveforms at the pile end and vehicle end.

[0004] There is currently no effective solution to the above problems. Summary of the Invention

[0005] This invention provides a charging and discharging control guidance generation method and system to at least solve the technical problem in related technologies where the waveform generated by current triggering control is not ideal, which is detrimental to the acquisition and judgment of waveforms at the pile end and vehicle end.

[0006] According to one aspect of the present invention, a charging and discharging control guidance generation method is provided, comprising: receiving a first pulse width modulation signal sent by a charging pile using a signal receiving terminal, wherein the first pulse width modulation signal is a voltage signal that changes between high and low levels according to a predetermined duty cycle; performing signal conversion on the first pulse width modulation signal using a non-current triggered control circuit to obtain a second pulse width modulation signal, wherein the voltage amplitude range of the first pulse width modulation signal is smaller than the voltage amplitude range of the second pulse width modulation signal; and using a signal detection module to detect whether the second pulse width modulation signal output by the non-current triggered control circuit matches a predetermined signal amplitude range, and determining that the interaction between the vehicle and the charging pile is completed if the second pulse width modulation signal matches the predetermined signal amplitude range.

[0007] According to another aspect of the present invention, a charging and discharging control guidance generation system is provided, applied to a vehicle, comprising: a signal receiving end, a non-current triggered control circuit, and a signal detection module of the vehicle, wherein the signal receiving end is used to receive a first pulse width modulation signal sent by a charging pile and input it to the non-current triggered control circuit, wherein the first pulse width modulation signal is a voltage signal that changes between high and low levels according to a predetermined duty cycle; the non-current triggered control circuit is used to perform signal conversion on the first pulse width modulation signal to obtain a second pulse width modulation signal, wherein the voltage amplitude range of the first pulse width modulation signal is smaller than the voltage amplitude range of the second pulse width modulation signal; the signal detection module is used to detect whether the second pulse width modulation signal output by the non-current triggered control circuit matches the predetermined signal amplitude range, and if the second pulse width modulation signal matches the predetermined signal amplitude range, it is determined that the interaction between the vehicle and the charging pile is completed.

[0008] In this embodiment of the invention, a signal receiving end receives a first pulse width modulation (PWM) signal sent by a charging pile. The first PWM signal is a voltage signal that changes between high and low levels according to a predetermined duty cycle. A non-current-triggered control circuit converts the first PWM signal to obtain a second PWM signal, where the voltage amplitude range of the first PWM signal is smaller than that of the second PWM signal. A signal detection module detects whether the second PWM signal output by the non-current-triggered control circuit matches the predetermined signal amplitude range. If the second PWM signal matches the predetermined signal amplitude range, the interaction between the vehicle and the charging pile is determined to be complete. This achieves the goal of using a non-current-triggered control circuit, improving signal response speed, and reducing line voltage drop. It also reduces signal distortion and misjudgment of interaction signals between the charging pile and the vehicle, thus solving the technical problem in related technologies where current-triggered control generates unsatisfactory waveforms, hindering waveform acquisition and judgment at both the charging pile and vehicle ends. Attached Figure Description

[0009] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0010] Figure 1 This is a circuit diagram of a charge / discharge control and guidance generation method provided by relevant technologies;

[0011] Figure 2 This is a flowchart of an optional charge / discharge control guide generation method provided according to an embodiment of the present invention;

[0012] Figure 3 This is a schematic diagram of an optional charge / discharge control and guidance generation system provided according to an embodiment of the present invention;

[0013] Figure 4 This is a circuit diagram of an optional charge / discharge control and guidance generation system provided according to an embodiment of the present invention;

[0014] Figure 5 This is a circuit diagram of another optional charge / discharge control and guidance generation system provided according to an embodiment of the present invention. Detailed Implementation

[0015] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0016] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0017] For ease of description, the following explains some of the nouns or terms used in the embodiments of this application:

[0018] Pulse Width Modulation (PWM) signals control the output power of a circuit by changing the width of the pulse. They are commonly used for analog signal modulation in digital circuits. A key characteristic of PWM signals is that the pulse width can be adjusted as needed, thus achieving precise control of the output signal. A PWM signal is a periodic signal, and its duty cycle determines the ratio of the duration of high and low voltage levels in the signal.

[0019] The CP control guide signal, in AC charging piles, generally employs a PID control algorithm, where the controlled object is the output current of the AC charging pile. The controller measures the current of the battery pack and compares it with the desired target, calculates a new current control signal, and then controls the charging of the electric vehicle by adjusting the output power of the charging pile.

[0020] In digital circuits, the rising edge is the instant (moment) when the digital level changes from low level (digit "0") to high level (digit "1").

[0021] In digital circuits, the falling edge refers to the instant when the signal state changes from "1" (high level) to "0" (low level).

[0022] Figure 1 This is a circuit diagram of a charge / discharge control guidance generation method provided by related technologies, such as... Figure 1 The diagram illustrates a method in related technologies where a current-triggered control circuit generates a pulse width modulation (PWM) signal. A PWM wave of 0V-3.3V is input from the PWM input pin, meaning the high level of this PWM signal is 3.3V and the low level is 0V. The PWM output pin is used to provide the CP control boot signal.

[0023] First, regarding the PWM input of 3.3V, "+3.3V" indicates a 3.3V power supply. Through the voltage divider of resistors R1 and R3, the negative input terminal of the differential operational amplifier U1 receives a voltage of 3.3V / 2 = 1.65V. Since the voltage at the positive input terminal of U1 (PWM signal high level) is 3.3V through resistor R2, and the voltage at the negative input terminal is 1.65V, according to the characteristics of the differential amplifier, the output terminal of U1 is high. This high level is provided by the +12V power supply connected to the positive input terminal of U1. R4 is a forward bias resistor. Through the gate resistor R5, it can be determined that the state of transistor Q1 is conducting (transistor Q2 is cut off at this time). After Q1 conducts, the new PWM signal output through resistor R7 is high (+12V). Capacitor C1 is used to filter the +12V power supply, and capacitor C2 is used to filter the -12V power supply, making the power supply provided by the system more stable.

[0024] Similarly, regarding the case where the PWM input is 0V, since the voltage at the positive input terminal of U1 is 0V and the voltage at the negative input terminal is 1.65V, according to the characteristics of the differential amplifier, the signal output terminal of U1 is low. This low level is provided by the -12V power supply connected to the negative input terminal of U1. R4 is a forward bias resistor, and through the gate resistor R6, it can be determined that the state of transistor Q2 is on (transistor Q1 is off at this time). After Q2 is turned on, the new PWM signal output through resistor R7 is low (-12V).

[0025] The circuit structure composed of Q1 and Q2 is a typical push-pull circuit, used to improve the load capacity of U1. It can be understood that the duty cycle of the input PWM signal is matched with the generated PWM signal, and the original input PWM signal is amplified and converted.

[0026] Since a transistor is a current-controlled device, its operating principle is based on current control. In a transistor, when an input signal is applied to the base, it causes a change in current between the collector and emitter. Because the change in current requires time to propagate and respond, the transistor's reaction speed as a current-controlled device is relatively slow. Therefore, from a principle perspective, the transistor's reaction speed as a current-controlled device is slow.

[0027] This leads to two problems in the related technology: the rising and falling edges of the CP control guidance signal are too long, resulting in poor waveform anti-interference ability and inaccuracy, which is not conducive to waveform acquisition and judgment at the pile end and vehicle end. Furthermore, the use of transistors for push-pull output results in a large voltage drop, causing deviations in the voltage divider at the vehicle end.

[0028] To address the aforementioned problems, this invention provides a method embodiment for generating charge and discharge control guidance. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0029] Figure 2 This is a flowchart of a charge / discharge control guide generation method according to an embodiment of the present invention, such as... Figure 2 As shown, the method includes the following steps:

[0030] Step S202: The first pulse width modulation signal sent by the charging pile is received by the signal receiving end. The first pulse width modulation signal is a voltage signal that changes between high and low levels according to a predetermined duty cycle.

[0031] It is understood that the method provided in this embodiment is applied to the vehicle end, using a signal receiver to acquire a first pulse width modulation signal from the charging pile. This first pulse width modulation signal is a voltage signal that changes between high and low levels according to a predetermined duty cycle. At the vehicle end, it is desired to amplify the first pulse width modulation signal to efficiently and accurately generate a second pulse width modulation signal with predetermined high and low levels.

[0032] Optionally, the charging plug needs to be inserted into the car's charging socket, and after insertion, the seven pins (terminal pins) are connected one-to-one. The charge / discharge control guidance function can be implemented within the OBC (On-Board Charge) or the BMS (Battery Management System). The aforementioned signal receiver can be electrically connected to the CP signal pin of the charging socket.

[0033] Step S204: The first pulse width modulation signal is converted into a second pulse width modulation signal using a non-current trigger control circuit. The voltage amplitude range of the first pulse width modulation signal is smaller than that of the second pulse width modulation signal.

[0034] It is understandable that, in order to improve the response speed of the rising and falling edges of the signal, a non-current-triggered control circuit is used to realize the signal conversion of the first pulse width modulation signal, and amplify the first pulse width modulation signal into a second pulse width modulation signal with a larger voltage amplitude range.

[0035] Optionally, the voltage amplitude range of the first pulse width modulation signal is preferably set to 0V-3.3V, and the voltage amplitude range of the second pulse width modulation signal is preferably set to -12V to +12V.

[0036] In one optional embodiment, the non-current-triggered control circuit generates a second pulse width modulation signal using a voltage-triggered controller. The non-current-triggered control circuit includes: a signal amplification circuit, a high-level output circuit, and a low-level output circuit. The non-current-triggered control circuit performs signal conversion on the first pulse width modulation signal to obtain the second pulse width modulation signal, including: amplifying the first pulse width modulation signal using the signal amplification circuit to generate a voltage control signal; using the high-level output circuit to output a high-level signal from the second pulse width modulation signal to the signal detection module based on the voltage control signal; and using the low-level output circuit to output a low-level signal from the second pulse width modulation signal to the signal detection module based on the voltage control signal.

[0037] This embodiment presents a non-current-triggered control circuit that uses a voltage-triggered controller to generate a second pulse-width modulation (PWM) signal. This non-current-triggered control circuit can be functionally divided into three parts: a signal amplification circuit, a high-level output circuit, and a low-level output circuit. First, the signal amplification circuit processes the first PWM signal to generate a voltage control signal. This voltage control signal can be used to drive the high-level output circuit to output a high level of the second PWM signal, or to drive the low-level output circuit to output a low level of the second PWM signal. Through this process, a non-current-triggered control method can be used to generate both high and low levels of the second PWM signal, achieving the high sensitivity that current-triggered controllers cannot.

[0038] In one optional embodiment, the signal amplification circuit includes a first amplification circuit, which includes a first metal-oxide-semiconductor field-effect transistor (MOSFET). The high-level output circuit includes a second MOSFET. The first and second MOSFETs are voltage-triggered control devices. The high-level output circuit outputs a high-level signal from the second pulse-width modulation (PWM) signal to the signal detection module based on a voltage control signal. This includes: when the first MOSFET is at a high level, the first gate of the first MOSFET controls the conduction between the first drain and the first source of the first MOSFET, generating a first control signal from the voltage control signal, wherein the first control signal triggers the second gate of the second MOSFET to conduct; when the first MOSFET is at a low level, the first gate controls the cutoff between the first drain and the first source of the first MOSFET, generating a second control signal from the voltage control signal, wherein the second control signal triggers the cutoff of the second gate; when the second gate is in the conduction state, the second drain of the second MOSFET conducts with the second source of the second MOSFET, and outputs a system high level provided by the vehicle end to the signal detection module through the second drain as the high-level signal from the second pulse-width modulation (PWM) signal.

[0039] It is understandable that the signal discharge circuit in the non-current-triggered control current includes a first amplifier circuit. This first amplifier circuit uses a first MOSFET as a voltage-triggered control device. When the first pulse width modulation signal connected to the first gate of the first MOSFET is high, the first drain and first source of the first MOSFET are connected. After the first MOSFET is turned on, it changes the voltage received at the second gate of the second MOSFET (the level changes from high to low, falling edge), which is the first control signal. The second MOSFET inputs a high-level output circuit. The second gate controls the connection between the second source and the second drain, causing the high-level output circuit to output the system high level provided by the vehicle end, which serves as the high-level signal in the second pulse width modulation signal.

[0040] When the first pulse width modulation signal connected to the first gate of the first MOSFET is low, the first drain and the first source of the first MOSFET are cut off. After the first MOSFET is cut off, it will change the voltage on the second gate of the second MOSFET (the level changes from low to high, rising edge), that is, the second control signal. The second gate controls the second source and the second drain to also be cut off, and no voltage signal is output to the outside.

[0041] It's important to note that a MOSFET is a voltage-controlled device, operating on the principle of electric field control. In a MOSFET, when an input signal is applied to the gate, it alters the electric field between the gate and drain, thus affecting the current between the drain and source. Because the electric field propagates much faster than the current, the MOSFET's response speed as a voltage-controlled device is relatively fast.

[0042] Optionally, based on the material properties of the MOSFETs, the first MOSFET is an NMOS transistor, and the second MOSFET is a PMOS transistor. An NMOS transistor is a field-effect transistor, also known as an N-channel MOSFET, which consists of a P-type doped region and two N+ type doped regions on an N-type substrate. When a positive voltage is applied to the gate, an N-type channel is formed, creating a conduction path between the drain and source. A PMOS transistor is a field-effect transistor, also known as a P-channel MOSFET, which consists of an N-type doped region and two P+ type doped regions on a P-type substrate. When a negative voltage is applied to the gate, a P-type channel is formed, creating a conduction path between the drain and source. The main difference between the two is that an NMOS transistor uses an N-type channel to form the conduction path, while a PMOS transistor uses a P-type channel. Furthermore, an NMOS transistor conducts when a positive voltage is applied to the gate, while a PMOS transistor conducts when a negative voltage is applied to the gate.

[0043] Optionally, the high-level voltage of the above system is preferably set to +12V.

[0044] In one optional embodiment, the signal amplification circuit includes a second amplification circuit, the second amplification circuit includes a third MOSFET, and the low-level output circuit includes a fourth MOSFET. The third and fourth MOSFETs are voltage-triggered control devices. The low-level output circuit, based on a voltage control signal, outputs a low-level signal from the second pulse-width modulation signal to the signal detection module. This includes: when the first pulse-width modulation signal is low, the third gate of the third MOSFET controls the conduction between the third drain and the third source of the third MOSFET, generating a third control signal from the voltage control signal. The three control signals trigger the fourth gate of the fourth MOSFET to conduct. When the first pulse width modulation signal is high, the third gate controls the third drain and third source to be cut off, generating the fourth control signal in the voltage control signal. The fourth control signal triggers the fourth gate to be cut off. When the fourth gate of the fourth MOSFET is in the conduction state, the fourth drain and fourth source of the fourth MOSFET are connected. The fourth source outputs the system low level provided by the vehicle end to the signal detection module as the low level signal in the second pulse width modulation signal.

[0045] It is understandable that the signal discharge circuit in the non-current-triggered control current includes a second amplifier circuit. This second amplifier circuit uses a third MOSFET as a voltage-triggered control device. When the first pulse-width modulation signal connected to the third gate of the third MOSFET is low, the third source and third drain of the third MOSFET are turned on. After the third MOSFET is turned on, it changes the voltage received by the fourth gate of the fourth MOSFET (the voltage changes from low to high, rising edge), which is the third control signal. This causes the fourth gate of the fourth MOSFET to control the conduction between the fourth source and fourth drain, resulting in the low-level circuit outputting the system low level provided by the vehicle end, serving as the low-level signal in the second pulse-width modulation signal.

[0046] When the first pulse width modulation signal connected to the third gate of the third MOSFET is high, the third drain and the third source of the third MOSFET are cut off. After the third MOSFET is cut off, it will change the voltage on the fourth gate of the fourth MOSFET (the level changes from high to low, falling edge), that is, the fourth control signal. The fourth gate controls the fourth source and the fourth drain to also be cut off, and no voltage signal is output to the outside.

[0047] Optionally, based on the material properties of the MOSFET, the third MOSFET is a PMOS transistor and the fourth MOSFET is an NMOS transistor.

[0048] Optionally, the low level of the above system is preferably set to -12V.

[0049] In one optional embodiment, the non-current-triggered control circuit generates a second pulse width modulation signal using a voltage isolation switch chip and a differential operational amplifier, and performs signal conversion on the first pulse width modulation signal to obtain the second pulse width modulation signal. This includes: receiving the first pulse width modulation signal at the chip input terminal of the voltage isolation switch chip and converting it into a predetermined differential amplitude range to obtain a first differential signal; inputting the first differential signal to the positive signal input terminal of the differential operational amplifier using the chip output terminal of the voltage isolation switch chip; and generating the second pulse width modulation signal using the differential operational amplifier based on the first differential signal and a predetermined second low-level power supply input to the differential operational amplifier.

[0050] It is understood that this embodiment also provides a non-current-triggered control circuit that uses a voltage-isolated switch chip and a differential operational amplifier to amplify the first pulse width modulation signal to obtain a second pulse width modulation signal. The voltage-isolated switch chip receives the first pulse width modulation signal at its input terminal and outputs a first differential signal to the positive input terminal of the differential operational amplifier through its output terminal. Since the first pulse width modulation signal changes between high and low levels according to a predetermined duty cycle, the first differential signal also changes with the first pulse width modulation signal. The negative input terminal of the differential operational amplifier receives a second differential signal from a predetermined second low-level power supply. Through the operation and processing of the differential operational amplifier, the second pulse width modulation signal is output from the signal output terminal of the differential operational amplifier.

[0051] It should be noted that the aforementioned voltage isolation switch chip combined with a differential operational amplifier provides high voltage amplification capability, enabling the output second pulse width modulation signal to achieve the required larger voltage amplitude and better driving capability. Compared to the push-pull circuit of transistors in related technologies, it has better load-carrying capacity. Furthermore, due to the use of a voltage isolation switch chip, noise interference in the circuit can be effectively isolated, improving the stability and reliability of the second pulse width modulation signal. Compared to transistors, differential operational amplifiers are voltage-triggered devices, thus having a faster switching speed and enabling a quicker response to changes in the input signal, providing a faster response time for generating the second pulse width modulation signal.

[0052] Step S206: The signal detection module is used to detect whether the second pulse width modulation signal output by the non-current trigger control circuit matches the predetermined signal amplitude range. If the second pulse width modulation signal matches the predetermined signal amplitude range, it is determined that the interaction between the vehicle and the charging pile is completed.

[0053] It is understandable that after the non-current-triggered control circuit outputs the second pulse width modulation signal, the signal detection module checks whether this generated second pulse width modulation signal matches the predetermined signal amplitude range. This detection is to determine the current status of the charging pile's charging state. The first pulse width modulation signal is sent from the charging pile to the vehicle to inform the vehicle of the charging pile's current charging capacity. If the generated second pulse width modulation signal matches the predetermined signal amplitude range, it ensures that the charging and discharging process between the vehicle and the charging pile is correct, the interaction between the vehicle and the charging pile is complete, charging and discharging processing can be implemented, and the probability of failure is reduced.

[0054] Through the above steps S202, a signal receiving end receives the first pulse width modulation signal sent by the charging pile, wherein the first pulse width modulation signal is a voltage signal that changes between high and low levels according to a predetermined duty cycle; in step S204, a non-current-triggered control circuit is used to convert the first pulse width modulation signal into a second pulse width modulation signal, wherein the voltage amplitude range of the first pulse width modulation signal is smaller than the voltage amplitude range of the second pulse width modulation signal; in step S206, a signal detection module is used to detect whether the second pulse width modulation signal output by the non-current-triggered control circuit matches the predetermined signal amplitude range. If the second pulse width modulation signal matches the predetermined signal amplitude range, it is determined that the interaction between the vehicle and the charging pile is complete. This method uses a non-current-triggered control circuit, which improves signal response speed and reduces line voltage drop, thereby reducing signal distortion and misjudgment of the interaction signal between the charging pile and the vehicle. It also solves the technical problem in related technologies where the waveform generated by current-triggered control is not ideal, leading to difficulties in waveform acquisition and judgment between the charging pile and the vehicle.

[0055] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0056] In this embodiment of the invention, a charge-discharge control and guidance generation system is also provided. The charge-discharge control and guidance generation system provided in this embodiment of the invention will be described below.

[0057] Figure 3 This is a structural block diagram of a charge / discharge control and guidance generation system provided in an embodiment of the present invention, applied to a vehicle, such as... Figure 3 As shown, the system includes: a signal receiver 302, a non-current triggered control circuit 304, and a signal detection module 306. The system will be described below.

[0058] The signal receiving end 302 is used to receive the first pulse width modulation signal sent by the charging pile and input it into the non-current trigger control circuit. The first pulse width modulation signal is a voltage signal that changes between high and low levels according to a predetermined duty cycle.

[0059] The non-current-triggered control circuit 304 is connected to the signal receiving terminal 302 and is used to convert the first pulse width modulation signal into a second pulse width modulation signal, wherein the voltage amplitude range of the first pulse width modulation signal is smaller than the voltage amplitude range of the second pulse width modulation signal.

[0060] The signal detection module 306 is connected to the non-current trigger control circuit 304 and is used to detect whether the second pulse width modulation signal output by the non-current trigger control circuit matches the predetermined signal amplitude range. If the second pulse width modulation signal matches the predetermined signal amplitude range, it is determined that the interaction between the vehicle and the charging pile is completed.

[0061] This system, applied to the vehicle, uses a signal receiver to acquire a first pulse-width modulation (PWM) signal from the charging pile. This first PWM signal is a voltage signal that changes between high and low levels according to a predetermined duty cycle. The vehicle aims to amplify this first PWM signal to efficiently and accurately generate a second PWM signal with predetermined high and low levels. To improve the response speed of the signal's rising and falling edges, a non-current-triggered control circuit is used to convert the first PWM signal, amplifying it into a second PWM signal with a wider voltage amplitude range. After the non-current-triggered control circuit outputs the second PWM signal, a signal detection module checks whether this generated second PWM signal matches the predetermined signal amplitude range. This detection determines the charging status of the charging pile, as the first PWM signal is sent from the charging pile to the vehicle to inform the vehicle of the charging pile's current charging capacity. If the generated second PWM signal matches the predetermined signal amplitude range, it ensures that the charging and discharging process between the vehicle and the charging pile is correct, the interaction between the vehicle and the charging pile is complete, and charging and discharging processing can be implemented, reducing the probability of failure.

[0062] As an optional embodiment, the non-current-triggered control circuit generates a second pulse-width modulation (PWM) signal using a voltage-triggered controller. The non-current-triggered control circuit includes: a signal amplification circuit, a high-level output circuit, and a low-level output circuit. One end of the signal amplification circuit is connected to a signal receiving end, and the other end is connected to the high-level output circuit and the low-level output circuit, respectively. The signal amplification circuit amplifies the first PWM signal to generate a voltage control signal. The high-level output circuit is connected to a signal detection module and outputs a high-level signal from the second PWM signal to the signal detection module based on the voltage control signal. The low-level output circuit is connected to the signal detection module and outputs a low-level signal from the second PWM signal to the signal detection module based on the voltage control signal.

[0063] It is understandable that a voltage-triggered controller is used to generate the second pulse-width modulation (PWM) signal. This non-current-triggered control circuit can be functionally divided into three parts: a signal amplification circuit, a high-level output circuit, and a low-level output circuit. First, the signal amplification circuit processes the first PWM signal to generate a voltage control signal. This voltage control signal can be used to drive the high-level output circuit to output a high level of the second PWM signal, or to drive the low-level output circuit to output a low level of the second PWM signal. Through this setup, a non-current-triggered control method can be used to generate both high and low levels of the second PWM signal, achieving the high sensitivity that current-triggered controllers cannot.

[0064] As an optional embodiment, the signal amplification circuit includes a first amplification circuit, which includes a first metal-oxide-semiconductor field-effect transistor (MOSFET). The high-level output circuit includes a second MOSFET. The first and second MOSFETs are voltage-triggered control devices, wherein the first gate of the first MOSFET is connected to the signal receiving terminal, the first drain of the first MOSFET is connected to the system high level provided by the vehicle terminal, and the first source of the first MOSFET is connected to the system ground provided by the vehicle terminal; the second gate of the second MOSFET is connected to the first drain, the second source of the second MOSFET is connected to the system high level, and the second drain of the second MOSFET is connected to the signal detection module; the first MOSFET... A first MOSFET is used to control the conduction between the first drain and the first source by the first gate when the first pulse width modulation signal is high, generating a first control signal in the voltage control signal, which triggers the second gate to conduct; and when the first pulse width modulation signal is low, it controls the cutoff between the first drain and the first source by the first gate, generating a second control signal in the voltage control signal, which triggers the second gate to cut off. A second MOSFET is used to connect the second drain and the second source when the second gate is triggered to conduct, and output a system high level to the signal detection module through the second drain as a high-level signal in the second pulse width modulation signal.

[0065] It is understood that the signal discharge circuit in the non-current-triggered control current includes a first amplification circuit, which uses a first MOSFET as a voltage-triggered control device. The circuit is configured such that the first gate of the first MOSFET is connected to the signal receiving terminal and receives a first pulse width modulation signal, the first drain of the first MOSFET is connected to the system high level provided by the vehicle terminal, and the first source of the first MOSFET is connected to the system ground provided by the vehicle terminal.

[0066] When the first pulse width modulation signal connected to the first gate of the first MOSFET is high, the first drain and first source of the first MOSFET are conducting. The conduction of the first MOSFET changes the voltage at the second gate of the second MOSFET (the voltage changes from high to low, with a falling edge), which is the first control signal. The second MOSFET belongs to the high-level output circuit. The second gate controls the conduction between the second source and the second drain, causing the high-level output circuit to output the system high level provided by the vehicle end, which serves as the high-level signal in the second pulse width modulation signal.

[0067] When the first MOSFET is off, it is equivalent to an open circuit. The first drain is connected to the system high level through a pull-up resistor, so the first drain is at a high level when the first MOSFET is off. When the first MOSFET is on, it is equivalent to a closed circuit. The first source is connected to the system ground, so the first drain is connected to the system ground after the first MOSFET is on, and the voltage drops to a low level.

[0068] The second gate of the second MOSFET is connected to the first drain, the second source of the second MOSFET is connected to the system high level, and the second drain of the second MOSFET is connected to the signal detection module. When the second MOSFET is turned on, the second drain is connected to the system high level, which will output a high-level signal in the second pulse width modulation signal.

[0069] When the first pulse width modulation signal connected to the first gate of the first MOSFET is low, the first drain and the first source of the first MOSFET are cut off. After the first MOSFET is cut off, it will change the voltage on the second gate of the second MOSFET (the level changes from low to high, rising edge), that is, the second control signal. The second gate controls the second source and the second drain to also be cut off, and no voltage signal is output to the outside.

[0070] Optionally, a gate resistor is provided between the first gate and the signal receiving terminal to stabilize the input signal. A pull-up resistor is provided between the first drain and the system high level to maintain the potential and short-circuit to system ground when the first MOSFET is turned on.

[0071] Optionally, the high-level signal in the system can be connected to system ground via a filter capacitor. Due to the capacitor's characteristic of blocking DC from AC, high-frequency interference signals included in the high-level signal can be filtered out by directing them to system ground. Multiple filter capacitors can be set according to specific requirements, each used to filter interference signals of different frequencies.

[0072] As an optional embodiment, the non-current-triggered control circuit includes: a first switching discharge circuit, the first switching discharge circuit including a first discharge resistor and a first discharge diode, the first discharge resistor and the first discharge diode being connected in parallel, the anode of the first discharge diode being connected to the first drain, and the cathode of the first discharge diode being connected to the second gate, wherein the first switching discharge circuit is used to discharge voltage when the conduction or cutoff state of the first drain and the first source changes.

[0073] It is understood that a first switching discharge circuit is provided between the first amplification circuit and the high-level output circuit, consisting of a first discharge resistor and a first discharge diode connected in parallel. Due to the switching characteristics of the MOS, voltage oscillations will occur under high-frequency switching conditions. This is because there is residual voltage, which needs to be discharged through the circuit formed by the first discharge resistor and the first discharge diode. The electrical energy is consumed in the first discharge resistor, which helps to maintain the voltage stability of the second gate.

[0074] As an optional embodiment, the signal amplification circuit includes: a second amplification circuit, the second amplification circuit including a third MOSFET, and a low-level output circuit including a fourth MOSFET. The third MOSFET and the fourth MOSFET are voltage-triggered control devices, wherein the third gate of the third MOSFET is connected to the signal receiving terminal, the third drain of the third MOSFET is connected to the system low level provided by the vehicle terminal, and the third source of the third MOSFET is connected to a predetermined first low-level power supply provided by the vehicle terminal, wherein the predetermined first low-level power supply is higher than the system low level; the fourth gate of the fourth MOSFET is connected to the third drain, the fourth source of the fourth MOSFET is connected to the system low level, and the fourth drain of the fourth MOSFET is connected to the signal detection module. The third MOSFET is used to control the conduction between the third drain and the third source by the third gate when the first pulse width modulation signal is low, generating the third control signal in the voltage control signal. The third control signal causes the fourth gate to be triggered to conduct. When the first pulse width modulation signal is high, the third gate controls the conduction between the third drain and the third source to be cut off, generating the fourth control signal in the voltage control signal. The fourth control signal causes the fourth gate to be triggered to be cut off. The fourth MOSFET is used to make the fourth drain and the fourth source conduct when the fourth gate is triggered to conduct, and output a low level to the signal detection module through the fourth source as a low level signal in the second pulse width modulation signal.

[0075] It is understood that the signal discharge circuit in the non-current-triggered control current includes a second amplification circuit, which uses a third MOSFET as a voltage-triggered control device. The circuit is configured such that the third gate of the third MOSFET is connected to the signal receiving terminal and receives the first pulse width modulation signal, the third drain of the third MOSFET is connected to the system low level provided by the vehicle terminal, and the third source of the third MOSFET is connected to the predetermined first low-level power supply provided by the vehicle terminal.

[0076] When the first pulse width modulation signal connected to the first gate of the third MOSFET is low, the third drain and third source of the third MOSFET are conducting. The conduction of the third MOSFET changes the voltage at the fourth gate of the fourth MOSFET (level changes from low to high, rising edge), which is the third control signal. The fourth MOSFET belongs to the low-level output circuit. The fourth gate controls the conduction between the fourth source and fourth drain, causing the low-level output circuit to output the system low level provided by the vehicle end, serving as the low-level signal in the second pulse width modulation signal.

[0077] When the third MOSFET is off, it is equivalent to an open circuit. The third drain is connected to the system low level through another pull-up resistor, so the third drain is at a low level when the third MOSFET is off. When the third MOSFET is on, it is equivalent to a closed circuit. The third source is connected to the predetermined first low-level power supply. Therefore, when the third MOSFET is on, the third drain is connected to the predetermined first low-level power supply. Since the potential of the predetermined first low-level power supply is higher than the system low level, it will cause the third drain to rise in level.

[0078] The fourth gate of the fourth MOSFET is connected to the third drain, the fourth source of the fourth MOSFET is connected to the system low level, and the fourth drain of the fourth MOSFET is connected to the signal detection module. When the fourth MOSFET is turned on, the fourth drain is connected to the system low level, which will output a low-level signal in the second pulse width modulation signal.

[0079] When the first pulse width modulation signal connected to the third gate of the third MOSFET is high, the third drain and the third source of the third MOSFET are cut off. After the third MOSFET is cut off, it will change the voltage on the fourth gate of the fourth MOSFET (the level changes from high to low, falling edge), that is, the fourth control signal. The fourth gate controls the fourth source and the fourth drain to also be cut off, and no voltage signal is output to the outside.

[0080] Optionally, the aforementioned predetermined first low-level power supply is set to +3.3V.

[0081] Optionally, the aforementioned system low level can be connected to system ground via a filter capacitor, allowing high-frequency interference signals included in the system low level to be filtered out by directing them to system ground. Multiple filter capacitors can be configured to filter interference signals of different frequencies, depending on specific requirements.

[0082] In one optional embodiment, the non-current-triggered control circuit includes: a second switching discharge circuit, which includes a second discharge resistor and a second discharge diode connected in parallel. The positive terminal of the second discharge diode is connected to a fourth gate, and the negative terminal of the second discharge diode is connected to a third drain. The second switching discharge circuit is used to discharge voltage when the conduction or cutoff state of the third drain and the third source changes.

[0083] It is understandable that a second switching bleeder circuit is provided between the second amplifier circuit and the low-level output circuit, consisting of a second bleeder resistor and a second bleeder diode connected in parallel. Voltage oscillations will occur during high-frequency switching due to residual voltage, which needs to be discharged through the loop formed by the second bleeder resistor and the second bleeder diode. This dissipates electrical energy in the second bleeder resistor, which helps maintain the voltage stability of the fourth gate.

[0084] In one optional embodiment, the non-current-triggered control circuit includes: a clamping diode and a feedthrough filter. The clamping diode has three terminals: a first terminal connected to the input terminal of the feedthrough filter, a second terminal connected to a system high level provided by the vehicle, and a third terminal connected to a system low level provided by the vehicle. The output terminal of the feedthrough filter is connected to a signal detection module. The clamping diode is used to maintain the second pulse width modulation signal within the range between the system high level and the system low level. The feedthrough filter is used to filter out signals in the second pulse width modulation signal that do not match a predetermined frequency.

[0085] It's understandable that the output of the non-current-triggered control circuit should be between the system high and low levels. However, due to potential electromagnetic interference, the output second pulse-width modulation (PWM) signal might be affected. Therefore, a clamping diode is used to limit the second PWM signal to between the system high and low levels. The second PWM signal is then input to the feedpass filter and processed by it. The feedpass filter allows the signal to pass within a specific frequency range (i.e., a predetermined frequency) while filtering out signals of other frequencies. The feedpass filter is used to improve signal quality and clarity.

[0086] In one alternative embodiment, the non-current-triggered control circuit includes: a transient voltage suppression (TVS) diode, one end of which is connected to the output of a feedthrough filter, and the other end of which is connected to a system ground provided by the vehicle, wherein the TVS diode is used to discharge the pulse signal included in the second pulse width modulation signal.

[0087] It is understandable that TVS diodes are used to discharge potential pulse signals from the second pulse width modulation signal, protecting other electronic components from transient voltage surges. When an excessively high transient voltage occurs in the circuit, the TVS diode will quickly conduct, diverting the excessive voltage to system ground, thereby protecting other components from overvoltage and extending the lifespan of electronic equipment.

[0088] Based on the above embodiments and optional embodiments, the present invention proposes an optional implementation method. Figure 4 This is a circuit diagram of an optional charge / discharge control and guidance generation system provided according to an embodiment of the present invention, such as... Figure 4As shown, the PWM input is the first pulse width modulation (PWM) signal, and the PWM output is the second pulse width modulation (PWM) signal. Q3 is the first MOSFET, which is an NMOS transistor; Q4 is the second MOSFET, which is a PMOS transistor; Q5 is the third MOSFET, which is a PMOS transistor; and Q6 is the fourth MOSFET, which is an NMOS transistor. Each MOSFET has three pins: G represents the gate, D represents the drain, and S represents the source. +12V represents the system high level, -12V represents the system low level, +3.3V represents the predetermined first low-level power supply, and GND represents the system ground.

[0089] R8 and R14 are pull-up resistors, R10 and R12 are gate resistors, R9 is the first bleeder resistor, R13 is the second bleeder resistor, R11 is used for connecting the +3.3V power supply to the PWM input, R15 and R16 are drain resistors, C3 to C6 are filter capacitors, C7 is a feedthrough filter, D1 is the first bleeder diode, D2 is the second bleeder diode, D3 is a clamping diode, and D4 indicates a TVS diode.

[0090] When the PWM input is high, the gate of Q3 is high, satisfying the forward bias of the NMOS transistor gate voltage, Q3 is turned on, and R8 is turned on to the system ground. When the gate of Q4 is low, satisfying the reverse bias of the PMOS transistor gate voltage, Q4 is turned on. At this time, the PWM output is a high level of +12V.

[0091] When the PWM input is low, the gate of Q5 is high, satisfying the reverse bias of the PMOS transistor gate voltage, Q6 is turned on, R14 is turned on to 3.3V, and the gate of Q5 is high (that is, pulled high from the original potential of -12V by +3.3V, not changed to +12V), satisfying the forward bias of the NMOS transistor gate voltage, Q5 is turned on, and the PWM output is low-level -12V.

[0092] The oscillations generated by the high-frequency switching of R8 and R9, combined with the residual voltage after the discharge of D1 and D2, are all included. D3 is a clamping diode, ensuring that the output voltage is always maintained within the range of +12V to -12V.

[0093] Since the CP control output signal generally needs to be maintained at 1kHz, C7 is used for fixed-frequency filtering to ensure it is not interfered with by other external signal sources and to improve signal integrity. D4 is used to discharge high-frequency pulse signals and protect the circuit components.

[0094] In one optional embodiment, the non-current-triggered control circuit uses a voltage isolation switch chip and a differential operational amplifier to generate a second pulse width modulation signal. The output terminal of the voltage isolation switch chip is connected to the positive input terminal of the differential operational amplifier, the negative input terminal of the differential operational amplifier is connected to a predetermined second low-level power supply, and the output terminal of the differential operational amplifier is connected to a signal detection module. The voltage isolation switch chip is used to receive the first pulse width modulation signal at its input terminal and convert it into a predetermined differential amplitude range to obtain a first differential signal. The first differential signal is then input to the positive input terminal through its output terminal. The differential operational amplifier is used to generate the second pulse width modulation signal based on the first differential signal and the second differential signal input by the predetermined second low-level power supply.

[0095] It is understood that a voltage-isolated switch chip and a differential operational amplifier are used to amplify the first pulse-width modulation (PWM) signal to obtain the second PWM signal. The voltage-isolated switch chip is configured to output the first differential signal at the positive input terminal of the differential operational amplifier. Through the connection between the chip's output terminal and the positive input terminal, the differential operational amplifier obtains a signal that changes with the first PWM signal. The differential operational amplifier outputs different signals based on the comparison between the positive and negative input terminals. The negative input terminal receives a second differential signal from a predetermined second low-level power supply. Through the processing of the differential operational amplifier, the second PWM signal is output from its signal output terminal.

[0096] In one optional embodiment, the non-current-triggered control circuit includes a first feedback resistor, a second feedback resistor, a third feedback resistor, and a fourth feedback resistor. The chip output terminal is connected to one end of the first feedback resistor, and the other end of the first feedback resistor is connected to the positive signal input terminal. One end of the second feedback resistor is connected to the positive signal input terminal, and the other end of the second feedback resistor is connected to the system ground provided by the vehicle. One end of the third feedback resistor is connected to a predetermined second low-level power supply, and the other end of the third feedback resistor is connected to the negative signal input terminal. One end of the fourth feedback resistor is connected to the negative signal input terminal, and the other end of the fourth feedback resistor is connected to the signal output terminal. The resistance values ​​of the first and third feedback resistors are matched, and the resistance values ​​of the second and fourth feedback resistors are matched. The positive power input terminal of the differential operational amplifier is connected to the system high level provided by the vehicle, and the negative power input terminal of the differential operational amplifier is connected to the system low level provided by the vehicle.

[0097] It is understandable that by configuring the values ​​of the first, second, third, and fourth feedback resistors, the op-amp multiplier can be controlled. The resistance values ​​of these four resistors are interrelated, so that the ratio of the first and second feedback resistors is the same as the ratio of the third and fourth feedback resistors, i.e., the op-amp multiplier is the same.

[0098] Based on the above embodiments and optional embodiments, the present invention proposes an optional implementation method. Figure 5 This is a circuit diagram of another optional charge / discharge control and guidance generation system provided according to an embodiment of the present invention, wherein C8 to C11 are filter capacitors, U2 represents a voltage isolation switch chip, U3 represents a differential operational amplifier, R17 is a first feedback resistor, R18 is a second feedback resistor, R19 is a third feedback resistor, R20 is a fourth feedback resistor, R21 is an output resistor, VDD1 is the first power supply terminal of U2, connected to a +3.3V power supply, VDD2 is the second power supply terminal of U2, connected to a +5V power supply, VIB is the input terminal of U2, VOB is the output terminal of U2, GND1 and GND2 are the two ground terminals of U2, the positive power input terminal of U3 is connected to +12V, the negative power input terminal of U3 is connected to -12V, and +2.5V is a predetermined second low-level power supply.

[0099] If the input signal from VIB of U2 is 3.3V, VOB will output 5V as the first differential signal. Since the feedback resistor value is set so that R18 / R17=R20 / R19=4.8, the op-amp multiplier can be controlled to be 4.8 times. The second differential signal is 2.5V. According to the op-amp principle, (first differential signal - second differential signal) × op-amp multiplier, we can get that when VOB=5V, the PWM output is +12V.

[0100] Similarly, if the VIB input signal of U2 is 0V, the VOB will output 0V as the first differential signal. With the op-amp multiplier and the second differential signal remaining unchanged, a PWM output of -12V can be obtained. Using this method, a second pulse width modulation signal with a high level of +12V and a low level of -12V can be generated as the output.

[0101] In a charging and discharging control guidance generation system provided in this embodiment of the invention, a signal receiving terminal 302 is used to receive a first pulse width modulation signal sent by a charging pile and input it into a non-current trigger control circuit. The first pulse width modulation signal is a voltage signal that changes between high and low levels according to a predetermined duty cycle. The non-current trigger control circuit 304, connected to the signal receiving terminal 302, is used to convert the first pulse width modulation signal into a second pulse width modulation signal. The voltage amplitude range of the first pulse width modulation signal is smaller than that of the second pulse width modulation signal. A signal detection module 306, connected to the non-current trigger control circuit 304, is used to detect whether the second pulse width modulation signal output by the non-current trigger control circuit matches the predetermined signal amplitude range. If the second pulse width modulation signal matches the predetermined signal amplitude range, it is determined that the interaction between the vehicle and the charging pile is complete. The use of non-current-triggered control circuits has achieved the goal of improving signal response speed and reducing line voltage drop, thereby reducing signal distortion and misjudgment of interaction signals between the pile end and the vehicle end. This solves the technical problem in related technologies where the waveform generated by current-triggered control is not ideal, which is detrimental to the acquisition and judgment of waveforms at the pile end and the vehicle end.

[0102] This invention provides a non-volatile storage medium storing a program that, when executed by a processor, implements a charge / discharge control boot generation method.

[0103] This invention provides an electronic device including a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, it performs the following steps: receiving a first pulse-width modulation (PWM) signal sent by a charging pile using a signal receiver, wherein the first PWM signal is a voltage signal that changes between high and low levels according to a predetermined duty cycle; converting the first PWM signal using a non-current-triggered control circuit to obtain a second PWM signal, wherein the voltage amplitude range of the first PWM signal is smaller than that of the second PWM signal; detecting whether the second PWM signal output by the non-current-triggered control circuit matches a predetermined signal amplitude range using a signal detection module; if the second PWM signal matches the predetermined signal amplitude range, determining that the interaction between the vehicle and the charging pile is complete. The device described herein can be a server, PC, etc.

[0104] This invention also provides a computer program product, which, when executed on a data processing device, is suitable for executing an initialization program with the following steps: receiving a first pulse width modulation signal sent by a charging pile using a signal receiver, wherein the first pulse width modulation signal is a voltage signal that changes between high and low levels according to a predetermined duty cycle; converting the first pulse width modulation signal using a non-current-triggered control circuit to obtain a second pulse width modulation signal, wherein the voltage amplitude range of the first pulse width modulation signal is smaller than the voltage amplitude range of the second pulse width modulation signal; detecting whether the second pulse width modulation signal output by the non-current-triggered control circuit matches the predetermined signal amplitude range, and determining that the interaction between the vehicle and the charging pile is complete when the second pulse width modulation signal matches the predetermined signal amplitude range.

[0105] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0106] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0107] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0108] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0109] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0110] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0111] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0112] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0113] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0114] The above are merely embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A method for generating charge / discharge control guidance, characterized in that, include: The signal receiving end receives the first pulse width modulation signal sent by the charging pile, wherein the first pulse width modulation signal is a voltage signal that changes between high and low levels according to a predetermined duty cycle; A non-current-triggered control circuit is used to convert the first pulse width modulation signal to obtain a second pulse width modulation signal, wherein the voltage amplitude range of the first pulse width modulation signal is smaller than the voltage amplitude range of the second pulse width modulation signal. A signal detection module is used to detect whether the second pulse width modulation signal output by the non-current trigger control circuit matches a predetermined signal amplitude range. If the second pulse width modulation signal matches the predetermined signal amplitude range, it is determined that the interaction between the vehicle and the charging pile is complete. The non-current-triggered control circuit generates the second pulse width modulation signal using a voltage-triggered controller. The non-current-triggered control circuit includes a signal amplification circuit, a high-level output circuit, and a low-level output circuit. The process of converting the first pulse width modulation signal to the second pulse width modulation signal using the non-current-triggered control circuit includes: amplifying the first pulse width modulation signal using the signal amplification circuit to generate a voltage control signal; using the high-level output circuit to output a high-level signal from the second pulse width modulation signal to the signal detection module based on the voltage control signal; and using the low-level output circuit to output a low-level signal from the second pulse width modulation signal to the signal detection module based on the voltage control signal. The signal amplification circuit includes a first amplification circuit, which includes a first metal-oxide-semiconductor field-effect transistor (MOSFET). The high-level output circuit includes a second MOSFET. The first and second MOSFETs are voltage-triggered control devices. The step of using the high-level output circuit to output a high-level signal from the second pulse-width modulation signal to the signal detection module based on the voltage control signal includes: when the first pulse-width modulation signal is high, the first gate of the first MOSFET controls the conduction between the first drain and the first source of the first MOSFET, thereby generating a first control signal from the voltage control signal. Wherein, the first control signal causes the second gate of the second MOS transistor to be triggered to the on state; when the first pulse width modulation signal is low, the first gate controls the first drain and the first source of the first MOS transistor to be cut off, thereby generating the second control signal in the voltage control signal, wherein the second control signal causes the second gate to be triggered to the off state; when the second gate is triggered to the on state, the second drain of the second MOS transistor is turned on to the second source of the second MOS transistor, and the second drain outputs the system high level provided by the vehicle end to the signal detection module as the high level signal in the second pulse width modulation signal.

2. The method according to claim 1, characterized in that, The signal amplification circuit includes a second amplification circuit, the second amplification circuit includes a third MOSFET, and the low-level output circuit includes a fourth MOSFET. The third MOSFET and the fourth MOSFET are respectively the voltage trigger control devices. The step of using the low-level output circuit to output a low-level signal from the second pulse width modulation signal to the signal detection module based on the voltage control signal includes: When the first pulse width modulation signal is low, the third gate of the third MOS transistor controls the conduction between the third drain and the third source of the third MOS transistor, generating the third control signal in the voltage control signal. The third control signal causes the fourth gate of the fourth MOS transistor to be triggered to conduct. When the first pulse width modulation signal is high, the third MOS transistor is used to control the cutoff between the third drain and the third source by the third gate, thereby generating the fourth control signal in the voltage control signal. The fourth control signal causes the fourth gate to be triggered into a cutoff state. When the fourth MOS transistor is in the fourth gate-triggered conduction state, the fourth drain of the fourth MOS transistor is made to conduct with the fourth source of the fourth MOS transistor. The fourth source outputs the system low level provided by the vehicle terminal to the signal detection module as the low level signal in the second pulse width modulation signal.

3. The method according to claim 1, characterized in that, The non-current-triggered control circuit generates the second pulse width modulation signal using a voltage isolation switch chip and a differential operational amplifier. The non-current-triggered control circuit performs signal conversion on the first pulse width modulation signal to obtain the second pulse width modulation signal, including: The first pulse width modulation signal is received at the chip input terminal of the voltage isolation switch chip, and the first pulse width modulation signal is converted into a predetermined differential amplitude range to obtain a first differential signal. The first differential signal is input to the positive signal input terminal of the differential operational amplifier using the output terminal of the voltage isolation switch chip. The second pulse width modulation signal is generated by using the differential operational amplifier based on the first differential signal and the second differential signal input to the differential operational amplifier by a predetermined second low-level power supply.

4. A charge / discharge control and guidance generation system, characterized in that, Applied to the vehicle end, it includes: a signal receiver, a non-current-triggered control circuit, and a signal detection module for the vehicle end, wherein... The signal receiving end is used to receive the first pulse width modulation signal sent by the charging pile and input it into the non-current trigger control circuit, wherein the first pulse width modulation signal is a voltage signal that changes between high and low levels according to a predetermined duty cycle. The non-current-triggered control circuit is used to perform signal conversion on the first pulse width modulation signal to obtain a second pulse width modulation signal, wherein the voltage amplitude range of the first pulse width modulation signal is smaller than the voltage amplitude range of the second pulse width modulation signal. The signal detection module is used to detect whether the second pulse width modulation signal output by the non-current trigger control circuit matches the predetermined signal amplitude range. If the second pulse width modulation signal matches the predetermined signal amplitude range, it is determined that the interaction between the vehicle and the charging pile is completed. The non-current-triggered control circuit generates the second pulse width modulation signal using a voltage-triggered controller. The non-current-triggered control circuit includes: a signal amplification circuit, a high-level output circuit, and a low-level output circuit. One end of the signal amplification circuit is connected to the signal receiving end, and the other end is connected to the high-level output circuit and the low-level output circuit, respectively. The signal amplification circuit amplifies the first pulse width modulation signal to generate a voltage control signal. The high-level output circuit is connected to the signal detection module and outputs a high-level signal from the second pulse width modulation signal to the signal detection module based on the voltage control signal. The low-level output circuit is connected to the signal detection module and outputs a low-level signal from the second pulse width modulation signal to the signal detection module based on the voltage control signal. The signal amplification circuit includes a first amplification circuit, which includes a first metal-oxide-semiconductor field-effect transistor (MOSFET). The high-level output circuit includes a second MOSFET. The first and second MOSFETs are respectively the voltage trigger control devices. The first gate of the first MOSFET is connected to the signal receiving terminal, the first drain of the first MOSFET is connected to the system high level provided by the vehicle terminal, and the first source of the first MOSFET is connected to the system ground provided by the vehicle terminal. The second gate of the second MOSFET is connected to the first drain, the second source of the second MOSFET is connected to the system high level, and the second drain of the second MOSFET is connected to the signal detection module. The first MOSFET is used in the signal amplification circuit... When the pulse width modulation signal is high, the first gate controls the conduction between the first drain and the first source, generating a first control signal in the voltage control signal. The first control signal triggers the second gate to conduct. When the first pulse width modulation signal is low, the first gate controls the cutoff between the first drain and the first source, generating a second control signal in the voltage control signal. The second control signal triggers the second gate to cut off. The second MOS transistor is used to connect the second drain and the second source when the second gate is in the conduction state, and outputs the system high level to the signal detection module through the second drain as the high-level signal in the second pulse width modulation signal.

5. The system according to claim 4, characterized in that, The non-current-triggered control circuit includes: a first switching discharge circuit, the first switching discharge circuit including a first discharge resistor and a first discharge diode, the first discharge resistor and the first discharge diode being connected in parallel, the anode of the first discharge diode being connected to the first drain, and the cathode of the first discharge diode being connected to the second gate, wherein... The first switch discharge circuit is used to discharge voltage when the conduction or cutoff state of the first drain and the first source changes.

6. The system according to claim 4, characterized in that, The signal amplification circuit includes: a second amplification circuit, the second amplification circuit including a third MOSFET; the low-level output circuit includes a fourth MOSFET; the third MOSFET and the fourth MOSFET are voltage-triggered control devices, wherein... The third gate of the third MOS transistor is connected to the signal receiving terminal, the third drain of the third MOS transistor is connected to the system low level provided by the vehicle terminal, and the third source of the third MOS transistor is connected to a predetermined first low level power supply provided by the vehicle terminal, wherein the predetermined first low level power supply is higher than the system low level. The fourth gate of the fourth MOS transistor is connected to the third drain, the fourth source of the fourth MOS transistor is connected to the low level of the system, and the fourth drain of the fourth MOS transistor is connected to the signal detection module. The third MOS transistor is configured to, when the first pulse width modulation signal is low, control the conduction between the third drain and the third source by the third gate to generate a third control signal in the voltage control signal, the third control signal causing the fourth gate to be triggered to a conduction state; and when the first pulse width modulation signal is high, control the cutoff between the third drain and the third source by the third gate to generate a fourth control signal in the voltage control signal, the fourth control signal causing the fourth gate to be triggered to a cutoff state. The fourth MOS transistor is used to make the fourth drain and the fourth source conduct when the fourth gate is triggered to conduct, and output the system low level to the signal detection module through the fourth source as the low level signal in the second pulse width modulation signal.

7. The system according to claim 6, characterized in that, The non-current-triggered control circuit includes: a second switching discharge circuit, which includes a second discharge resistor and a second discharge diode, the second discharge resistor and the second discharge diode being connected in parallel, the anode of the second discharge diode being connected to the fourth gate, and the cathode of the second discharge diode being connected to the third drain. The second switch discharge circuit is used to discharge voltage when the conduction or cutoff state of the third drain and the third source changes.

8. The system according to claim 4, characterized in that, The non-current-triggered control circuit includes a clamping diode and a feedthrough filter. The clamping diode has three terminals: the first terminal is connected to the input terminal of the feedthrough filter; the second terminal is connected to the system high level provided by the vehicle; and the third terminal is connected to the system low level provided by the vehicle. The output terminal of the feedthrough filter is connected to the signal detection module. The clamping diode is used to maintain the second pulse width modulation signal within the range between the system high level and the system low level; The feedthrough filter is used to filter out signals in the second pulse width modulation signal that do not match a predetermined frequency.

9. The system according to claim 8, characterized in that, The non-current-triggered control circuit includes: a transient voltage suppression TVS diode, one end of which is connected to the output terminal of the feedthrough filter, and the other end of which is connected to the system ground provided by the vehicle. The TVS diode is used to discharge the pulse signal included in the second pulse width modulation signal.

10. The system according to claim 4, characterized in that, The non-current-triggered control circuit uses a voltage isolation switch chip and a differential operational amplifier to generate the second pulse width modulation signal. The output terminal of the voltage isolation switch chip is connected to the positive input terminal of the differential operational amplifier, the negative input terminal of the differential operational amplifier is connected to a predetermined second low-level power supply, and the output terminal of the differential operational amplifier is connected to the signal detection module. The voltage isolation switch chip is used to receive the first pulse width modulation signal at the chip input terminal, convert the first pulse width modulation signal into a predetermined differential amplitude range to obtain a first differential signal; and input the first differential signal to the positive signal input terminal through the chip output terminal. The differential operational amplifier is used to generate the second pulse width modulation signal based on the first differential signal and the second differential signal input by the predetermined second low-level power supply.

11. The system according to claim 10, characterized in that, The non-current-triggered control circuit includes a first feedback resistor, a second feedback resistor, a third feedback resistor, and a fourth feedback resistor. The chip output terminal is connected to one end of the first feedback resistor, and the other end of the first feedback resistor is connected to the positive signal input terminal. One end of the second feedback resistor is connected to the positive signal input terminal, and the other end of the second feedback resistor is connected to the system ground provided by the vehicle. One end of the third feedback resistor is connected to the predetermined second low-level power supply, and the other end of the third feedback resistor is connected to the negative signal input terminal. One end of the fourth feedback resistor is connected to the negative signal input terminal, and the other end of the fourth feedback resistor is connected to the signal output terminal. The resistance values ​​of the first feedback resistor and the third feedback resistor are matched, and the resistance values ​​of the second feedback resistor and the fourth feedback resistor are matched. The positive power input terminal of the differential operational amplifier is connected to the system high level provided by the vehicle, and the negative power input terminal of the differential operational amplifier is connected to the system low level provided by the vehicle.

Images