EVCC low-power-consumption activation method and circuit based on ID signal, storage medium and electric vehicle

Abstract

The invention discloses an EVCC low-power-consumption activation method and circuit based on an ID signal, a storage medium and an electric automobile. The EVCC low-power-consumption activation method based on the ID signal comprises the steps that reference voltage is continuously provided at the ID signal input end of an EVCC through a low-static-current low-dropout voltage stabilizer; an initial ID signal from a charging gun passes through a large-resistance-value current-limiting resistor and then is sent to a voltage-regulator tube for clamping protection processing, and a target ID signal is obtained; inputting the target ID signal into a comparator, comparing the target ID signal with the current reference voltage, and outputting a corresponding analog level signal according to a comparison result; based on the analog level signal, a level detection circuit is used for carrying out gun insertion detection so as to determine whether a gun insertion action exists or not; if yes, a wake-up signal is output to the EVCC, so that the EVCC exits the low-power-consumption mode and enters a normal communication state. According to the embodiment, the activation power consumption of the EVCC can be reduced.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of electric vehicles, and particularly to a low-power activation method, device, storage medium and electric vehicle for an EVCC based on an ID signal. Background Art

[0002] With the rapid development of the electric vehicle (EV) market, high-power charging technology has become the key to improving vehicle range and user charging experience. The International Electrotechnical Commission (IEC) defines various control and detection signals for the signal lines in the Megawatt-Level Charging System (MCS) in its IEC61851-23-3 standard, and among them, the Insertion Detection (ID) signal is used to identify whether the charging gun has been correctly inserted into the vehicle's charging interface.

[0003] Currently, an Electric Vehicle Communication Controller (EVCC) usually needs to rely on a dedicated control signal on the charging pile side to wake itself up, so as to switch to the normal communication and charging mode when the gun is inserted. However, this solution requires additional drivers and level conversion circuits, thus increasing the static power consumption of the system. Summary of the Invention

[0004] The embodiments of the present application provide a low-power activation method, device, storage medium and electric vehicle for an EVCC based on an ID signal, which can reduce the activation power consumption of the EVCC.

[0005] In a first aspect, the embodiments of the present application provide a low-power activation method for an EVCC based on an ID signal, including: Continuously provide a reference voltage at the ID signal input end of the EVCC through a low-dropout regulator with low static current; After passing the initial ID signal from the charging gun through a large-value current-limiting resistor, send it to a voltage regulator diode for clamping protection processing to obtain a target ID signal; Input the target ID signal into a comparator to compare it with the current reference voltage, and output a corresponding analog level signal according to the comparison result; Based on the analog level signal, use a level detection circuit to perform gun insertion detection to determine whether there is a gun insertion action; If so, a wake-up signal is output to the EVCC to cause the EVCC to exit the low-power mode and enter the normal communication state.

[0006] In the EVCC low-power activation method based on the ID signal provided in the embodiment of the present application, the current reference voltage is dynamically generated by the microcontroller.

[0007] In the EVCC low-power activation method based on the ID signal provided in the embodiment of the present application, the step of dynamically generating the current reference voltage by the microcontroller includes: The microcontroller samples the target ID signal at a fixed period through its on-chip digital-to-analog converter; Within a preset sliding time window, the extreme values of the target ID signal are statistically calculated; The current reference voltage is generated based on the extreme values and sent to the comparator.

[0008] In the EVCC low-power activation method based on the ID signal provided in the embodiment of the present application, the extreme values include the maximum voltage value and the minimum voltage value. The step of generating the current reference voltage based on the extreme values includes: Obtaining the voltage difference between the maximum voltage value and the minimum voltage value; Using a threshold coefficient and a smoothing coefficient to perform weighted fusion of the voltage difference and the historical reference voltage to generate the current reference voltage.

[0009] In the EVCC low-power activation method based on the ID signal provided in the embodiment of the present application, after generating the current reference voltage, the method further includes: Measuring the current ambient temperature using a temperature sensor built-in or external to the microcontroller; Obtaining the temperature deviation value between the current ambient temperature and the reference temperature; Based on the temperature deviation value, adjusting the current reference voltage according to a temperature compensation coefficient.

[0010] In the EVCC low-power activation method based on the ID signal provided in the embodiment of the present application, the step of using a level detection circuit to detect the plugging of the charging gun based on the analog level signal to determine whether there is a plugging action of the charging gun includes: Inputting the analog level signal into a Schmitt trigger to generate a digital pulse signal; Inputting the digital pulse signal into a level detection circuit, where the level detection circuit is used to monitor the level state and duration of the digital pulse signal; Based on the level state and the duration, determining whether there is a plugging action of the charging gun.

[0011] In the method for low-power activation of EVCC based on the ID signal provided in the embodiment of the present application, determining whether there is a gun plugging action based on the level state and the duration includes: When the level state is high level and the duration exceeds the first preset threshold, it is determined that there is a gun plugging action; When the level state is low level and the duration exceeds the second preset threshold, it is determined that there is a gun unplugging action.

[0012] In a second aspect, the embodiment of the present application provides a low-power activation power supply for EVCC based on the ID signal, including: A low-dropout regulator with low static current, which is used to continuously provide a reference voltage at the ID signal input end of EVCC; A current-limiting resistor, which is used to perform high-resistance current limiting on the initial ID signal from the charging gun; A voltage stabilizing diode, which is used to perform clamping protection processing on the initial ID signal after passing through the high-resistance current-limiting resistor to obtain a target ID signal; A comparator, which is used to compare the target ID signal with the current reference voltage and output a corresponding analog level signal according to the comparison result; A level detection circuit, which is used to perform gun plugging detection based on the analog level signal to determine whether there is a gun plugging action; if so, output a wake-up signal to EVCC to make EVCC exit the low-power mode and enter the normal communication state.

[0013] In a third aspect, the present application provides a storage medium, which stores multiple instructions, and the instructions are suitable for being loaded by a processor to execute the method for low-power activation of EVCC based on the ID signal described in any one of the above.

[0014] In a fourth aspect, the present application provides an electric vehicle, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the method for low-power activation of EVCC based on the ID signal described in any one of the above is implemented.

[0015] In summary, the EVCC low-power activation method based on the ID signal provided by the embodiment of the present application includes continuously providing a reference voltage at the ID signal input end of the EVCC through a low-dropout regulator with low quiescent current; sending the initial ID signal from the charging gun through a large-value current-limiting resistor and then into a zener diode for clamping protection processing to obtain a target ID signal; inputting the target ID signal into a comparator to compare it with the current reference voltage, and outputting a corresponding analog level signal according to the comparison result; based on the analog level signal, using a level detection circuit to detect the insertion of the charging gun to determine whether there is an insertion action of the charging gun; if so, output a wake-up signal to the EVCC to enable the EVCC to exit the low-power mode and enter the normal communication state. In this embodiment, through the introduction of three-level hardware protection of a low-dropout regulator with low quiescent current, a current-limiting resistor, and a zener diode at the ID signal input end of the EVCC, and by comparing the ID signal with the reference voltage and directly determining the insertion action of the charging gun and outputting a wake-up signal with the help of the level detection circuit, the purpose of accurately detecting the insertion action of the charging gun with extremely low standby power consumption and quickly waking up the EVCC without the intervention of an additional control signal is achieved, thereby reducing the activation power consumption of the EVCC. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 is a flowchart of the EVCC low-power activation method based on the ID signal provided by the embodiment of the present application.

[0018] Figure 2 is a schematic structural diagram of the EVCC low-power activation circuit based on the ID signal provided by the embodiment of the present application.

[0019] Figure 3 is a schematic structural diagram of an electric vehicle provided by the embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0021] It should be noted that in this text, the term "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising that element. In addition, components, features, and elements with the same name in different embodiments of the present application may have the same meaning or different meanings, and their specific meanings need to be determined based on their explanations in the specific embodiments or further in combination with the context of the specific embodiments.

[0022] It should be understood that the specific embodiments described herein are merely used to explain the present application and are not used to limit the present application.

[0023] In subsequent descriptions, the suffixes such as "module", "component" or "unit" used to represent elements are only for the convenience of describing the present application, and they have no specific meaning in themselves. Therefore, "module", "component" or "unit" can be used interchangeably.

[0024] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0025] Currently, EVCC usually needs to rely on a dedicated control signal on the charging pile side to wake itself up in order to switch to the normal communication and charging mode when the charging gun is plugged in. However, this solution requires additional drivers and level conversion circuits, which increases the static power consumption of the system.

[0026] Based on this, the embodiments of the present application provide a low-power activation method, circuit, storage medium and electric vehicle for EVCC based on the ID signal. Specifically, the low-power activation circuit for EVCC based on the ID signal can be integrated in the electric vehicle.

[0027] The technical solutions shown in the present application will be described in detail below through specific embodiments. It should be noted that the description order of the following embodiments does not limit the priority order of the embodiments.

[0028] Please refer to Figure 1 ,Figure 1 It is a schematic flowchart of the EVCC low-power activation method based on the ID signal provided by an embodiment of the present application. The specific process of the EVCC low-power activation method based on the ID signal can be as follows: 101. At the ID signal input end of the EVCC, a reference voltage is continuously provided through a low-dropout regulator with low quiescent current.

[0029] At the ID signal input end of the EVCC, first, a stable reference voltage is continuously provided through a low-dropout regulator (LDO) with low quiescent current (Low Iq). For example, an LDO device with Iq < 1µA and an output of 5V can be selected to convert the external battery voltage into a 5V reference voltage and directly feed it to the sampling and comparison circuit of the ID signal. Since the quiescent current of this LDO in the standby mode is extremely low, it can ensure that the overall power consumption during long-term standby of the system remains at the µA level.

[0030] 102. The initial ID signal from the charging gun is sent through a large-value current-limiting resistor and then into a voltage regulator diode for clamping protection processing to obtain a target ID signal.

[0031] When the charging gun is inserted into the charging interface, the charging gun end will apply an initial ID signal to the ID line of the EVCC. This signal first passes through a large-value current-limiting resistor (for example, a typical value in the order of 100kΩ) to limit the transient current and prevent external overvoltage impact.

[0032] Subsequently, the current-limited ID signal is sent into a voltage regulator diode (such as a 5.6V Zener diode) for clamping protection. The clamping voltage of this voltage regulator diode is slightly higher than the normal ID signal amplitude and can automatically conduct when the signal voltage exceeds the safe range, protecting the subsequent comparator and the microcontroller input from damage. After these two levels of protection, a clean and controllable target ID signal is obtained.

[0033] 103. The target ID signal is input into a comparator and compared with the current reference voltage, and an analog level signal is output according to the comparison result.

[0034] Specifically, the target ID signal can be input into the positive input terminal of the comparator, and the comparator compares the target ID signal with the current reference voltage. When the voltage of the target ID signal is higher than the current reference voltage, the comparator can output a high-level analog signal; when the voltage of the target ID signal is lower than the current reference voltage, the comparator can output a low-level analog signal.

[0035] In some embodiments, the current reference voltage can adopt a fixed value. For example, the reference voltage continuously provided by the low-dropout regulator can be used as the current reference voltage.

[0036] However, considering that factors such as battery voltage, temperature, and electromagnetic interference (EMI) can cause the amplitude of the ID signal to drift, a fixed reference voltage is likely to cause false detection or missed detection. Therefore, in some embodiments, the current reference voltage is adaptively adjusted according to the characteristics of the actually sampled ID signal to make the EVCC activation judgment "both sensitive and reliable".

[0037] For example, the current reference voltage can be dynamically generated by a microcontroller. Specifically, the microcontroller can sample the target ID signal through its on-chip digital-to-analog converter at a fixed period; then, within a preset sliding time window, the extreme values of the target ID signal are statistically calculated; finally, the current reference voltage is generated based on the extreme values and sent to the comparator.

[0038] Among them, the extreme values refer to the maximum voltage value and the minimum voltage value. In the specific implementation process, the voltage difference between the maximum voltage value and the minimum voltage value can be obtained first; then, the voltage difference and the historical reference voltage are weighted and fused using a threshold coefficient and a smoothing coefficient to generate the current reference voltage.

[0039] Specifically, it can be as follows: . In this formula, refers to the current reference voltage, refers to the historical reference voltage, refers to the threshold coefficient, refers to the smoothing coefficient.

[0040] Among them, the threshold coefficient is used to determine the position of the current reference voltage between the maximum voltage value and the minimum voltage value of the signal within the current sampling window when calculating the current reference voltage each time. For example, when α = 0.5, the current reference voltage is located at the midpoint between the maximum voltage value and the minimum voltage value. The value range is usually 0 < α < 1, and the threshold coefficient can be adjusted according to the system's requirements for sensitivity and anti-false triggering. The larger α is, the closer the threshold is to the maximum voltage value, and the smaller it is, the closer it is to the minimum voltage value.

[0041] The smoothing coefficient is used to ensure that the update of the current reference voltage can quickly respond to environmental changes and will not jitter violently due to single fluctuations. For example, when β = 0.1, 10% of the current reference voltage comes from the current calculation and 90% comes from the historical reference voltage. The closer β is to 1, the more "aggressively" the current reference voltage follows the latest measurement value; the closer it is to 0, the smoother the update of the current voltage value and the slower the response.

[0042] In the actual application process, the threshold coefficient α can be selected from 0.5 to 0.7 to ensure sufficient sensitivity to the gun insertion signal while tolerating slight jitter. The smoothing coefficient β can be selected from 0.05 to 0.2, and can be specifically adjusted according to the system's balance requirement between stability and response speed.

[0043] It should be noted that the historical reference voltage refers to the current reference voltage obtained from the previous calculation.

[0044] It can be understood that the temperature coefficients of semiconductor devices (such as LDO, comparator, DAC, Schmitt trigger, etc.) are usually in the order of dozens to hundreds of ppm / °C. When the temperature increases, the regulated output and the comparator reference voltage will shift; conversely, when the temperature decreases, they will shift in the opposite direction. The resistance value on the ID signal line also changes with temperature, resulting in fluctuations in the actual signal amplitude with the ambient temperature. If the current reference voltage is not temperature-compensated, missed detections may occur at high temperatures (the current reference voltage is too high and the gun insertion signal is not sufficient to trigger); false alarms may occur at low temperatures (the current reference voltage is too low and noise or interference triggers misjudgment).

[0045] Therefore, in some embodiments, after obtaining the current reference voltage through the above embodiments, the microcontroller's built-in or external temperature sensor can be used to measure the current ambient temperature; obtain the temperature deviation value between the current ambient temperature and the reference temperature; and based on the temperature deviation value, adjust the current reference voltage according to the temperature compensation coefficient.

[0046] Specifically, the adjusted current reference voltage . Where T is the current ambient temperature, T0 is the reference temperature, and K t is the temperature compensation coefficient.

[0047] Similarly, in some embodiments, battery voltage compensation can also be performed on the current reference voltage.

[0048] It can be understood that by combining the above two fixed and adaptive schemes, it can be flexibly selected in different application scenarios. For example, in a simple scenario, a fixed reference voltage is used to reduce the system complexity; in a complex scenario, an adaptive reference voltage is used to improve the detection accuracy and robustness.

[0049] 104. Based on the analog level signal, use the level detection circuit to perform gun insertion detection to determine whether there is a gun insertion action.

[0050] In some embodiments, the analog level signal can be directly input into the level detection circuit for gun insertion detection. When the analog level signal is a high-level analog signal, it indicates that there is a gun insertion action. When the analog level signal is a low-level analog signal, it indicates that there is no gun insertion action.

[0051] However, in a high-power charging environment, transient spikes and electromagnetic interference will be superimposed on the ID signal line. Relying solely on analog level detection or software sampling is easily mis-triggered by short pulses. Therefore, in some embodiments, a Schmitt trigger can be added between the level detection circuit and the comparator. The Schmitt trigger is used to perform pre-debouncing, and then combined with digital judgment to form a dual "hardware + software" filtering, which greatly reduces the mis-trigger rate.

[0052] Specifically, an analog level signal can be input into the Schmitt trigger to generate a digital pulse signal; the digital pulse signal is input into the level detection circuit, and the level detection circuit is used to monitor the level state and duration of the digital pulse signal; based on the level state and duration, it is determined whether there is a gun insertion action.

[0053] Through the upper and lower dual-threshold switching mechanism, the Schmitt trigger can quickly and reliably remove the high-frequency glitches and jitters output by the comparator at the hardware level, and a clean digital edge can be obtained without additional filtering components.

[0054] Specifically, when the level state is high level and the duration exceeds the first preset threshold, it is determined that there is a gun insertion action; when the level state is low level and the duration exceeds the second preset threshold, it is determined that there is a gun removal action.

[0055] Among them, the first preset threshold can be 5ms to 20ms to filter out interference pulses shorter than this time; the second preset threshold can be 10ms to 50ms to prevent misjudging gun removal due to short-term poor contact; both the first preset threshold and the second preset threshold can be defined as macros in the firmware or dynamically configured in the EEPROM / DAC to adapt to different cable, environment or safety level requirements.

[0056] 105. If so, a wake-up signal is output to the EVCC to cause the EVCC to exit the low-power mode and enter the normal communication state.

[0057] After determining that there is a gun insertion action, the level detection circuit or the MCU can output a high-level wake-up signal through a dedicated GPIO port. This wake-up signal is first boosted in driving ability through a power driving stage (such as a push-pull output stage or an opto-isolator), and then sent to the WAKE pin of the EVCC; after receiving the wake-up signal, the EVCC immediately switches the power management unit to wake up the main control and communication modules from the low-power sleep state. At the same time, it can feedback the successful wake-up to the detection circuit through an internal handshaking mechanism (such as reading the status register or sending back an ACK pulse), and finally cause the EVCC to enter the standard charging parameter negotiation and communication state.

[0058] In summary, the EVCC low-power activation method based on the ID signal provided by the embodiment of the present application includes continuously providing a reference voltage at the ID signal input end of the EVCC through a low-dropout regulator with low quiescent current; sending the initial ID signal from the charging gun through a large-value current-limiting resistor and then sending it to a zener diode for clamping protection processing to obtain a target ID signal; inputting the target ID signal into a comparator to compare it with the current reference voltage and outputting a corresponding analog level signal according to the comparison result; based on the analog level signal, using a level detection circuit to detect the insertion of the charging gun to determine whether there is an insertion action of the charging gun; if so, outputting a wake-up signal to the EVCC to enable the EVCC to exit the low-power mode and enter the normal communication state. In this embodiment, through the three-level hardware protection of a low-dropout regulator with low quiescent current, a current-limiting resistor, and a zener diode introduced at the ID signal input end of the EVCC, and by comparing the ID signal with the reference voltage and directly determining the insertion action of the charging gun and outputting a wake-up signal with the help of the level detection circuit, the purpose of accurately detecting the insertion action of the charging gun with extremely low standby power consumption and quickly waking up the EVCC without the intervention of an additional control signal is achieved, thereby reducing the activation power consumption of the EVCC.

[0059] To facilitate the better implementation of the EVCC low-power activation method based on the ID signal provided by the embodiment of the present application, the embodiment of the present application also provides an EVCC low-power activation circuit based on the ID signal. The meanings of the terms are the same as those in the above-mentioned EVCC low-power activation method based on the ID signal, and the specific implementation details can refer to the description in the method embodiment.

[0060] Please refer to Figure 2 , Figure 2 which is a schematic structural diagram of the EVCC low-power activation circuit based on the ID signal provided by the embodiment of the present application. The EVCC low-power activation circuit based on the ID signal may include a low-dropout regulator 201 with low quiescent current, a current-limiting resistor 202, a zener diode 203, a comparator 204, and a level detection circuit 205.

[0061] The low-dropout regulator 201 with low quiescent current is used to continuously provide a reference voltage at the ID signal input end of the EVCC; The current-limiting resistor 202 is used to perform large-value current limiting on the initial ID signal from the charging gun; The zener diode 203 is used to perform clamping protection processing on the initial ID signal after passing through the large-value current-limiting resistor 202 to obtain a target ID signal; The comparator 204 is used to compare the target ID signal with the current reference voltage and output a corresponding analog level signal according to the comparison result; The level detection circuit 205 is used to detect the plugging of the charging gun based on the analog level signal to determine whether there is a plugging action of the charging gun; if so, it outputs a wake-up signal to the EVCC to enable the EVCC to exit the low-power mode and enter the normal communication state.

[0062] In some embodiments, the EVCC low-power activation circuit based on the ID signal may further include a microcontroller, a Schmitt trigger, and the like.

[0063] For the specific implementation manners of the above respective units, reference may be made to the embodiments of the EVCC low-power activation method based on the ID signal above, which will not be elaborated herein one by one.

[0064] In the embodiments of the present application, the low-Iq LDO and the optimized signal processing circuit work together to greatly reduce the energy consumption of the system in the long-term standby state and quickly activate when the charging gun is plugged. The large-value current-limiting resistor and the voltage-regulator diode form a multi-level protection system to prevent abnormal current or excessive voltage in the signal from damaging sensitive components and ensure the safe and stable operation of the system. Only relying on the standard ID signal without the need for additional control signal input not only reduces the hardware cost but also reduces the complexity of design and maintenance. The circuit design fully considers the requirements of the IEC 61851-23-3 standard to ensure that it will not interfere with the normal communication and charging process of the charging system.

[0065] In summary, the EVCC low-power activation circuit based on the ID signal provided in the embodiments of the present application can continuously provide a reference voltage at the ID signal input end of the EVCC through the low-dropout regulator 201 with low quiescent current; the initial ID signal from the charging gun is subjected to large-value current limiting by the current-limiting resistor 202; the initial ID signal after passing through the large-value current-limiting resistor 202 is subjected to clamping protection processing by the voltage-regulator diode 203 to obtain a target ID signal; the comparator 204 compares the target ID signal with the current reference voltage and outputs a corresponding analog level signal according to the comparison result; the level detection circuit 205 detects the plugging of the charging gun based on the analog level signal to determine whether there is a plugging action of the charging gun; if so, it outputs a wake-up signal to the EVCC to enable the EVCC to exit the low-power mode and enter the normal communication state. Through the introduction of three-level hardware protection of a low-dropout regulator with low quiescent current, a current-limiting resistor, and a voltage-regulator diode at the ID signal input end of the EVCC in this embodiment, and by comparing the ID signal with the reference voltage and directly determining the plugging action of the charging gun and outputting a wake-up signal with the help of the level detection circuit, the purpose of accurately detecting the insertion action of the charging gun and quickly waking up the EVCC with extremely low standby power consumption is achieved without the intervention of additional control signals, thereby reducing the activation power consumption of the EVCC.

[0066] The embodiments of the present application further provide an electric vehicle, which may integrate the EVCC low-power activation circuit based on the ID signal of the embodiments of the present application, such asFigure 3 As shown, it shows a schematic structural diagram of an electric vehicle involved in an embodiment of the present application. Specifically: The electric vehicle may include components such as a processor 301 with one or more processing cores and a memory 302 with one or more computer-readable storage media. Those skilled in the art can understand that Figure 3 the structure of the electric vehicle shown in does not constitute a limitation on the electric vehicle, and it may include more or fewer components than shown, or combine certain components, or have different component arrangements. Among them: The processor 301 is the control center of the electric vehicle, connecting various parts of the entire electric vehicle through various interfaces and lines. By running or executing software programs and / or the present application stored in the memory 302, and by calling the data stored in the memory 302, it executes various functions of the electric vehicle and processes data, thereby monitoring the electric vehicle as a whole. Optionally, the processor 301 may include one or more processing cores; preferably, the processor 301 may integrate an application processor and a modulation and demodulation processor. Among them, the application processor mainly processes operating storage media, user interfaces, and application programs, etc., and the modulation and demodulation processor mainly processes wireless communication. It can be understood that the above modulation and demodulation processor may not be integrated into the processor 301 either.

[0067] The memory 302 can be used to store software programs and the present application. The processor 301 executes various functional applications and data processing by running the software programs and the present application stored in the memory 302. The memory 302 may mainly include a program storage area and a data storage area. Among them, the program storage area can store operating storage media, application programs required for at least one function, etc.; the data storage area can store data created according to the use of the electric vehicle, etc. In addition, the memory 302 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices. Correspondingly, the memory 302 may also include a memory controller to provide the processor 301 with access to the memory 302.

[0068] Although not shown, the electric vehicle may also include a display unit, an input unit, a power supply, etc., which will not be elaborated here. Specifically in this embodiment, the processor 301 in the electric vehicle will, according to the following instructions, load the executable files corresponding to the processes of one or more application programs into the memory 302, and the processor 301 will run the application programs stored in the memory 302 to implement various functions as follows: At the ID signal input end of the EVCC, a reference voltage is continuously provided through a low-dropout regulator with low quiescent current; After the initial ID signal from the charging gun passes through a large-value current-limiting resistor, it is sent to a voltage-regulator diode for clamping protection processing to obtain a target ID signal; The target ID signal is input into a comparator and compared with the current reference voltage, and a corresponding analog level signal is output according to the comparison result; Based on the analog level signal, a gun-insertion detection is performed using a level detection circuit to determine whether there is a gun-insertion action; If so, a wake-up signal is output to the EVCC to cause the EVCC to exit the low-power mode and enter the normal communication state.

[0069] Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructions, or by controlling relevant hardware through instructions. The instructions can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0070] For this reason, an embodiment of the present application provides a storage medium in which multiple instructions are stored. The instructions can be loaded by a processor to execute the steps in any one of the methods provided by the embodiments of the present application. For example, the instructions can execute the following steps: At the ID signal input end of the EVCC, a reference voltage is continuously provided through a low-dropout regulator with low quiescent current; After the initial ID signal from the charging gun passes through a large-value current-limiting resistor, it is sent to a voltage-regulator diode for clamping protection processing to obtain a target ID signal; The target ID signal is input into a comparator and compared with the current reference voltage, and a corresponding analog level signal is output according to the comparison result; Based on the analog level signal, a gun-insertion detection is performed using a level detection circuit to determine whether there is a gun-insertion action; If so, a wake-up signal is output to the EVCC to cause the EVCC to exit the low-power mode and enter the normal communication state.

[0071] For the specific implementation of each of the above operations, reference can be made to the previous embodiments, which will not be elaborated here.

[0072] Among them, the storage medium may include: Read Only Memory (ROM), Random Access Memory (RAM), a magnetic disk or an optical disc, etc.

[0073] Since the instructions stored in the storage medium can execute the steps in any one of the methods provided by the embodiments of the present application, the beneficial effects achievable by any one of the methods provided by the embodiments of the present application can be achieved. For details, refer to the previous embodiments, which will not be elaborated here.

[0074] The above has introduced in detail the EVCC low-power activation method, circuit, storage medium, and electric vehicle based on the ID signal provided by this application. Specific examples are used in this article to elaborate on the principle and implementation manner of this application. The description of the above embodiments is only used to help understand the core idea of this application; at the same time, for those skilled in the art, according to the idea of this application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to this application.

Claims

1. A low-power activation method for EVCC based on ID signal, characterized in that, Comprising: At the ID signal input end of the EVCC, a low-dropout regulator with low quiescent current continuously provides a reference voltage; The initial ID signal from the charging gun is sent through a large-value current-limiting resistor and then into a zener diode for clamping protection processing to obtain a target ID signal; The target ID signal is input into a comparator to be compared with the current reference voltage, and an analog level signal is output according to the comparison result; Based on the analog level signal, a plug-in detection is performed using a level detection circuit to determine whether there is a plug-in action; If so, a wake-up signal is output to the EVCC to cause the EVCC to exit the low-power mode and enter the normal communication state.

2. The method for low-power activation of EVCC based on ID signal according to claim 1, wherein The current reference voltage is dynamically generated by a microcontroller.

3. The method for low-power activation of EVCC based on ID signal according to claim 2, wherein The dynamically generating the current reference voltage by the microcontroller includes: The microcontroller samples the target ID signal at a fixed period through its on-chip digital-to-analog converter; Within a preset sliding time window, the extreme values of the target ID signal are statistically calculated; The current reference voltage is generated based on the extreme values and sent to the comparator.

4. The method for low-power activation of EVCC based on ID signal according to claim 3, wherein The extreme values include a maximum voltage value and a minimum voltage value. The generating the current reference voltage based on the extreme values includes: Obtaining the voltage difference between the maximum voltage value and the minimum voltage value; Using a threshold coefficient and a smoothing coefficient to perform weighted fusion of the voltage difference with a historical reference voltage to generate the current reference voltage.

5. The method for low-power activation of EVCC based on ID signal according to claim 3 or 4, characterized in that, After generating the current reference voltage, it further includes: Measuring the current ambient temperature using a temperature sensor built in or external to the microcontroller; Obtaining the temperature deviation value between the current ambient temperature and the reference temperature; Based on the temperature deviation value, the current reference voltage is adjusted according to a temperature compensation coefficient.

6. The method for low-power activation of EVCC based on ID signal according to claim 1, characterized in that, The performing the plug-in detection using the level detection circuit based on the analog level signal to determine whether there is a plug-in action includes: Inputting the analog level signal into a Schmitt trigger to generate a digital pulse signal; Inputting the digital pulse signal into the level detection circuit, and the level detection circuit is used to monitor the level state and duration of the digital pulse signal; Based on the level state and the duration, determine whether there is a plug-in action.

7. The method for low-power activation of EVCC based on ID signal according to claim 6, wherein, Determining whether there is a plug-in action based on the level state and the duration includes: When the level state is high level and the duration exceeds a first preset threshold, it is determined that there is a plug-in action; When the level state is low level and the duration exceeds a second preset threshold, it is determined that there is a unplugging action.

8. An EVCC low-power activation circuit based on an ID signal, characterized in that Comprising: A low-dropout regulator with low quiescent current, which is used to continuously provide a reference voltage at the ID signal input end of the EVCC; A current-limiting resistor, which is used to perform large-value current limiting on the initial ID signal from the charging gun; A zener diode, which is used to perform clamping protection processing on the initial ID signal after passing through the large-value current-limiting resistor to obtain a target ID signal; A comparator, which is used to compare the target ID signal with the current reference voltage and output an analog level signal according to the comparison result; A level detection circuit is used to perform gun insertion detection based on the analog level signal to determine whether there is a gun insertion action; if so, a wake-up signal is output to the EVCC to cause the EVCC to exit the low-power mode and enter the normal communication state.

9. A storage medium, characterized in that, The storage medium stores multiple instructions, and the instructions are suitable for being loaded by a processor to execute the EVCC low-power activation method based on the ID signal according to any one of claims 1-7.

10. An electric vehicle, characterized in that, It includes a memory, a processor, and a computer program stored on the memory and executable on the processor. Among them, when the processor executes the computer program, the EVCC low-power activation method based on the ID signal according to any one of claims 1-7 is implemented.

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