Charging pile mute mode control method, control unit and charging pile

Abstract

This invention provides a method for controlling the silent mode of a charging pile, a control unit, and a charging pile, relating to the field of charging pile technology. When preset conditions for entering silent mode are met, the method determines a target silent mode from a set of preset silent modes. Each silent mode corresponds to a power threshold and a speed. The method then determines the target power threshold corresponding to the target silent mode, configures the upper limit of the charging pile's output power as the target power threshold, and controls the actual output power of the charging pile to be less than or equal to the target power threshold. After determining that the actual output power is less than or equal to the target power threshold, the method determines the target speed corresponding to the target silent mode and adjusts the speed of the charging pile's fan to the target speed. Thus, through hierarchical control of the silent mode, both the need for quiet operation and charging efficiency are considered; and by reducing power first and then fan speed, the risk of temperature rise damage to power devices is reduced, achieving a silent effect matching the silent mode.

Description

Technical Field

[0001] This invention relates to the field of charging pile technology, and in particular to a method for controlling the silent mode of a charging pile, a control unit, and a charging pile. Background Technology

[0002] Charging stations contain a power conversion unit that converts AC grid power into DC power to supply electric vehicles. With the increasing popularity of electric vehicles, charging stations are being installed more and more near residential areas. During charging, the noise generated by the high-speed operation of the cooling fan can easily lead to complaints from residents. To address this issue, charging stations typically have a silent mode, which reduces noise by lowering the fan speed.

[0003] However, simply reducing the fan speed will reduce heat dissipation capacity, leading to excessive temperature rise of internal power devices and even damage. Summary of the Invention

[0004] This invention provides a method for controlling the silent mode of a charging pile, a control unit, and a charging pile, in order to solve the problem of excessive noise in charging piles and reduce the risk of overheating and damage to power devices in silent mode.

[0005] In a first aspect, embodiments of the present invention provide a method for controlling the silent mode of a charging pile, comprising: When the preset conditions for entering silent mode are met, the target silent mode is determined from a plurality of preset silent modes; wherein, each silent mode corresponds to a power threshold and a speed. Based on the target quiet mode, determine the corresponding target power threshold, configure the upper limit of the charging pile's output power as the target power threshold, and control the actual output power of the charging pile to be less than or equal to the target power threshold. After determining that the actual output power is less than or equal to the target power threshold, the corresponding target speed is determined according to the target silent mode, and the speed of the charging pile fan is adjusted to the target speed.

[0006] In one possible implementation, the method also includes: When the preset conditions for exiting silent mode are met, the fan speed is restored to the maximum speed. After confirming that the fan speed has returned to the maximum speed, the upper limit of the charging pile's output power is configured as the maximum power threshold, and the actual output power of the charging pile is controlled to be less than or equal to the maximum power threshold.

[0007] In one possible implementation, the charging pile includes a DC-side controller and an AC-side controller. The DC-side controller is used to control the actual output power of the charging pile, and the AC-side controller is used to control the fan speed. To restore the fan speed to its maximum speed, the following steps are included: The DC-side controller sends an exit mute indication signal to the AC-side controller. The exit mute indication signal is used to instruct the AC-side controller to restore the fan speed to the maximum speed. The DC-side controller receives feedback signals from the AC-side controller, which are used to determine whether the fan speed has returned to its maximum speed. The feedback signal includes a first state value and a second state value. When the feedback signal is the first state value, it indicates that the fan speed has recovered to the maximum speed; when the feedback signal is the second state value, it indicates that the fan speed has not recovered to the maximum speed.

[0008] In one possible implementation, after determining that the fan speed has returned to its maximum speed, the upper limit of the charging pile's output power is configured as a maximum power threshold, and the actual output power of the charging pile is controlled to be less than or equal to the maximum power threshold, including: The DC-side controller receives the current feedback signal and obtains the previously received feedback signal; If the feedback signal received this time is the first state value and the feedback signal received last time was the second state value, then the DC side controller will configure the upper limit of the output power of the charging pile as the maximum power threshold, and control the actual output power of the charging pile to be less than or equal to the maximum power threshold.

[0009] In one possible implementation, before determining the target mute level from a plurality of preset mute levels, the method further includes: Obtain the actual distance between the installation location of the charging station and the residential area; Determine the distance interval within which the actual distance lies; where the distance interval is pre-defined; Based on the actual distance range and the pre-stored correspondence between the silent mode and the distance range, determine the target silent mode corresponding to the actual distance.

[0010] In one possible implementation, the method also includes: Obtain the correspondence between multiple preset silent levels and multiple set distance ranges; Based on noise standards for residential areas, the maximum permissible noise level for charging stations corresponding to each set distance interval is determined; where each set distance interval corresponds to a maximum permissible noise level. Determine the fan speed limit corresponding to each maximum permissible noise value; where each maximum permissible noise value corresponds to one fan speed limit. Determine the maximum safe output power of the charging pile corresponding to each fan speed limit; where each fan speed limit corresponds to a maximum safe output power. Store the silent mode, the set distance range, the maximum allowable noise value, the fan speed limit, and the maximum safe output power one by one to generate a mapping table; Based on the target noise level, determine the corresponding target power threshold, including: Based on the mapping table and the target silent mode, determine the maximum safe output power corresponding to the target silent mode, and use it as the target power threshold.

[0011] In one possible implementation, the charging pile includes a DC-side controller for controlling the actual output power of the charging pile; controlling the actual output power of the charging pile to be less than or equal to a target power threshold includes: The DC-side controller sets the internal mute flag based on the target mute level. During the period when the internal mute flag is set, the DC-side controller controls the actual output power to be less than or equal to the target power threshold.

[0012] In one possible implementation, the method also includes: Detect whether the current time has entered the target time period; the target time period is the time when the charging station is preset to be in silent mode; If the target time period is detected to be entered at the current time, it is determined that the preset conditions for entering silent mode are met; After entering the target time period at the current moment, check whether the current moment has exited the target time period; If the system detects that the current time period has ended, then the preset conditions for exiting silent mode have been met.

[0013] Secondly, embodiments of the present invention provide a charging pile silent mode control device, comprising: The first processing module is used to determine the target quiet mode from a set of preset quiet modes when the preset conditions for entering the quiet mode are met; wherein each quiet mode corresponds to a power threshold and a speed. The second processing module is used to determine the corresponding target power threshold according to the target silent mode, configure the upper limit of the output power of the charging pile as the target power threshold, and control the actual output power of the charging pile to be less than or equal to the target power threshold. The second processing module is also used to determine the corresponding target speed according to the target silent mode after determining that the actual output power is less than or equal to the target power threshold, and adjust the speed of the charging pile fan to the target speed.

[0014] Thirdly, embodiments of the present invention provide a control unit, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the method described in the first aspect or any possible implementation thereof.

[0015] Fourthly, embodiments of the present invention provide a charging pile, including a DC-side controller and an AC-side controller; the DC-side controller includes a control unit as described in the third aspect, used to control the actual output power of the charging pile; the AC-side controller is used to control the speed of the fan.

[0016] Fifthly, embodiments of the present invention provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the method described in the first aspect or any possible implementation thereof.

[0017] In a sixth aspect, embodiments of the present invention provide a computer program product, including a computer program that, when executed by a processor, implements the method described in the first aspect or any possible implementation thereof.

[0018] In this embodiment of the invention, when the preset conditions for entering silent mode are met, a target silent mode is determined from a plurality of preset silent modes. Each silent mode corresponds to a power threshold and a speed. Based on the target silent mode, a corresponding target power threshold is determined, the upper limit of the charging pile's output power is configured as the target power threshold, and the actual output power of the charging pile is controlled to be less than or equal to the target power threshold. After determining that the actual output power is less than or equal to the target power threshold, a corresponding target speed is determined based on the target silent mode, and the speed of the charging pile's fan is adjusted to the target speed. This invention provides multiple selectable silent modes, achieving refined hierarchical control. It can maintain a large output power of the charging pile to the maximum extent while meeting noise requirements, so as to avoid affecting charging efficiency. This embodiment of the invention first reduces the heat generation of power devices by limiting the output power, and then reduces the fan speed to reduce heat dissipation noise. The two are executed sequentially in time and cooperate with each other in function, so that the charging pile can achieve a silent effect matching the silent mode while ensuring the temperature safety of the power devices during the process of entering silent mode and after entering silent mode. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of an application scenario provided by an embodiment of the present invention; Figure 2 This is a flowchart illustrating the implementation of a silent mode control method for charging piles according to an embodiment of the present invention. Figure 3 This is a flowchart illustrating the implementation of a silent mode control method for charging piles according to another embodiment of the present invention. Figure 4 This is a schematic diagram of the structure of a charging pile provided in an embodiment of the present invention; Figure 5This is a schematic diagram of the structure of a charging pile silent mode control device provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of a control unit provided in an embodiment of the present invention. Detailed Implementation

[0020] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0021] With the increasing popularity of electric vehicles, charging stations are being installed more and more near residential areas. During charging, the noise generated by the high-speed operation of the cooling fans easily leads to complaints from residents. To address this issue, charging stations typically have a silent mode, which reduces noise by lowering the fan speed. However, simply reducing the fan speed can decrease heat dissipation capacity. If the charging station continues to operate at full power in this mode, it can cause excessive overheating of internal power components, potentially damaging them.

[0022] Based on this, this application provides a method for controlling the silent mode of a charging pile, which not only reduces the fan speed but also limits the output power of the charging pile accordingly, so as to reduce the heat generation of power devices and avoid overheating and damage to power devices caused by excessive output power and inadequate heat dissipation.

[0023] Figure 1 This is a schematic diagram illustrating an application scenario provided by an embodiment of the present invention. For example... Figure 1 As shown, this includes a charging pile installed near a residential area. The residential area is susceptible to noise pollution from the charging pile. The charging pile is equipped with a silent mode control unit to execute the silent mode control method provided in this embodiment of the invention.

[0024] For example, nighttime hours are used as the trigger condition for entering silent mode. When nighttime hours begin, the charging station will be configured to silent mode so as not to disturb the rest of residents in the residential area.

[0025] When the charging pile's silent mode control unit detects the arrival of nighttime, it first determines the target silent mode from a set of preset silent modes. Next, it determines the target power threshold corresponding to this silent mode, sets the upper limit of the charging pile's output power to the target power threshold, and controls the actual output power of the charging pile to be less than or equal to the target power threshold. This reduces heat generation by lowering the output power. After determining that the actual output power is less than or equal to the target power threshold, it determines the target speed corresponding to this silent mode and adjusts the charging pile's fan speed to the target speed to reduce noise.

[0026] Understandably, the target rotational speed needs to ensure that the internal power devices of the charging pile do not overheat and be damaged when the actual output power is less than or equal to the target power threshold. Here, the target rotational speed can be pre-calibrated. For example, based on testing of actual charging pile products, the internal power devices are set to be equal to the target power threshold, multiple fan speed values ​​are set and tested sequentially, and the minimum fan speed value that can ensure the safe operation of the internal power devices is determined as the target rotational speed corresponding to the target power threshold.

[0027] The following is combined with Figure 1 Application scenarios, refer to Figures 2-4 This paper describes a silent mode control method for charging piles according to an exemplary embodiment of the present invention. It should be noted that the above application scenarios are shown only to facilitate understanding of the spirit and principles of this application, and the embodiments of this application are not limited in any way. Rather, the embodiments of this application can be applied to any applicable scenario.

[0028] The silent mode control method for charging piles provided in this embodiment of the invention can be applied to charging piles. The executing entity of the silent mode control method for charging piles provided in this embodiment of the invention can be a controller or control unit inside the charging pile. In addition, the silent mode control method for charging piles provided in this embodiment of the invention can be executed on the same device or on different devices.

[0029] Figure 2 This is a flowchart illustrating the implementation of a charging pile silent mode control method according to an embodiment of the present invention. The following description uses the charging pile silent mode control unit as the executing entity to illustrate the charging pile silent mode control method provided in this embodiment. Figure 2 As shown, the method in this embodiment of the invention may include steps 201 to 203.

[0030] Step 201: When the preset conditions for entering silent mode are met, determine the target silent mode from a plurality of preset silent modes; wherein, each silent mode corresponds to a power threshold and a speed.

[0031] Here, the preset conditions for entering silent mode can be a preset silent period, such as 10 PM to 6 AM the next day. If the current time is detected as entering a preset silent period, then the preset conditions for entering silent mode are confirmed. The preset conditions can also be a silent mode entry command issued by the charging station administrator via an application or physical button. When the charging station's silent mode control unit receives this command, it confirms that the preset conditions for entering silent mode are met. Alternatively, the preset conditions can be a preset ambient noise threshold. If the detected ambient noise level is below the preset threshold, then the preset conditions for entering silent mode are confirmed.

[0032] In this step, there are multiple quiet operation settings, each corresponding to a set of control parameters: power threshold and speed. Different quiet operation settings correspond to different power thresholds and different speeds, which can meet different quiet operation requirements.

[0033] Among them, the power threshold is used to limit the maximum output power of the charging pile, and its value affects the charging speed; the rotation speed refers to the speed of the fan used to dissipate heat from the internal power devices of the charging pile, and its value affects the heat dissipation effect.

[0034] Generally, the higher the actual output power, the more heat the power devices generate, and the higher the charging efficiency; the higher the fan speed, the greater the airflow and the better the heat dissipation, but the greater the noise generated. Therefore, in order to ensure that the power devices inside the charging pile still operate within a safe temperature range when the charging pile enters silent mode, there is a positive correlation between the power threshold and the speed corresponding to the same silent mode. This can be understood as the higher the power threshold, the higher the required fan speed, or the higher the allowable power threshold for safe operation, as the higher the fan speed.

[0035] In some examples, considering the physical law that sound waves attenuate with increasing distance when propagating through the air, the permissible noise level generated at the charging station itself can be increased for charging stations located far from residential areas, while the noise ultimately reaching the residential area still meets the quietness requirements. Therefore, charging stations located far from residential areas can select a higher power threshold and a higher fan speed corresponding to the quiet mode, providing faster charging speeds while ensuring that noise levels in residential areas meet the standards.

[0036] In some examples, considering that residents have different levels of noise tolerance, the default quiet setting may not be sufficient to meet the quiet needs of every resident. Therefore, the quiet setting can be adjusted to a reasonable level based on resident feedback to meet individual quiet requirements. Assume that a higher quiet setting corresponds to a higher power threshold and a higher RPM. When residents complain about excessive noise, the quiet setting will be lowered by one or several levels; when residents indicate that they can accept slightly more noise in exchange for faster charging, the quiet setting will be raised by one or several levels.

[0037] Through the above method, the multiple noise levels in this step can adapt to diverse noise reduction needs based on different installation locations and varying user sensitivities. Users can select the appropriate target level according to their actual scenario, thus achieving a flexible balance between noise reduction requirements and charging efficiency: selecting a higher level results in faster charging speeds but relatively higher noise, while selecting a lower level provides better noise reduction but correspondingly slower charging speeds. This achieves refined, tiered control, balancing noise reduction needs and charging efficiency in different scenarios.

[0038] In addition, the target mute level can be determined in a pre-configured manner. Once the preset conditions for entering mute mode are met, a pre-stored mute level can be directly used as the target mute level. Alternatively, it can receive a mute level identifier sent with the mute mode entry command and select a matching mute level from multiple mute levels based on this identifier. Furthermore, it can determine a mute level that matches the current ambient noise level based on a pre-stored mapping relationship between ambient noise and mute levels, as well as the current ambient noise level.

[0039] Step 202: Determine the corresponding target power threshold based on the target silent mode, configure the upper limit of the charging pile's output power as the target power threshold, and control the actual output power of the charging pile to be less than or equal to the target power threshold.

[0040] Optionally, for each silent mode, a corresponding power threshold is pre-stored. After determining the target silent mode through step 201, the power threshold corresponding to the target silent mode can be read as the target power threshold.

[0041] Optionally, the charging pile silent mode control unit writes the target power threshold into the output power limit register, monitors the current output voltage and output current of the charging pile in real time, and calculates the actual output power. When the calculated actual output power exceeds the target power threshold, the charging pile silent mode control unit limits the actual output power to within the target power threshold by reducing the output current.

[0042] It should be noted that this step only limits the upper limit of the output power, and does not require the actual output power to always be equal to or close to this threshold. During actual charging, if the vehicle's power demand is lower than the target power threshold, the charging station will output power normally according to the vehicle's demand, without needing to actively reduce the power.

[0043] This step limits the charging pile's output power to a safe range that matches the silent mode, providing a safe cooling prerequisite for subsequently reducing fan speed.

[0044] Step 203: After determining that the actual output power is less than or equal to the target power threshold, determine the corresponding target speed according to the target silent mode, and adjust the speed of the charging pile fan to the target speed.

[0045] Optionally, for each silent mode, the corresponding fan speed value is pre-stored. After determining the target silent mode through step 201, the fan speed value corresponding to the target silent mode can be read as the target speed.

[0046] This step first confirms that the actual output power is less than or equal to the target power threshold, and then adjusts the fan speed. This is because the heat dissipation capacity will immediately decrease after the fan speed is reduced. If the output power is still high at this time, the power device will generate a lot of heat that cannot be dissipated in time, which may cause the temperature to continue to rise, triggering overheat protection or even damaging the device.

[0047] In this step, a feasible method to determine that the actual output power is less than or equal to the target power threshold is to continuously monitor the actual output power. When the actual output power monitored in multiple consecutive sampling cycles is less than or equal to the target power threshold, it can be determined that the actual output power is less than or equal to the target power threshold, thereby executing the subsequent fan speed adjustment step.

[0048] In some examples, for DC fans, the speed is controlled by adjusting the duty cycle of the pulse width modulation signal; in other examples, for AC fans, the speed is controlled by adjusting the output voltage or frequency.

[0049] Optionally, a closed-loop feedback control method can be used to adjust the fan speed to the target speed. For example, the current speed can be collected by a built-in or external speed sensor of the fan, the current speed can be compared with the target speed, and the control quantity (duty cycle of the pulse width modulation signal, output voltage, or output frequency) can be gradually adjusted until the error between the actual speed and the target speed is within the allowable range.

[0050] Through this step, the charging station reduces the fan speed to a target speed that matches the silent mode, while ensuring heat dissipation safety, thereby achieving the expected silent effect.

[0051] This invention provides multiple selectable silent modes, each corresponding to a set of power thresholds and fan speeds, allowing users to flexibly balance silent operation needs with charging efficiency based on actual scenarios. Furthermore, when entering silent mode, this invention first reduces the heat generated by power devices by limiting output power, and then reduces the fan speed to decrease heat dissipation noise. These two actions are executed sequentially and cooperate with each other, ensuring that the charging station achieves a silent effect that matches the silent mode while ensuring the temperature safety of power devices during and after entering silent mode.

[0052] In one possible implementation, before determining the target silent mode from a plurality of preset silent modes in step 201, the silent mode control method for charging piles provided in this embodiment of the invention further includes steps (1.1) to (1.3).

[0053] (1.1) Obtain the actual distance between the installation location of the charging pile and the residential area.

[0054] Here, the actual distance refers to the straight-line distance between the charging pile installation location and the residential area. The residential area closest to the charging pile can be selected to determine the actual distance in this step.

[0055] This actual distance can be obtained in several ways. For example, during charging pile installation, maintenance personnel can manually input the distance between the charging pile and the nearest residential area via a handheld terminal or the charging pile's configuration interface. Another example is that the charging pile's built-in GPS (Global Positioning System) module obtains its own latitude and longitude coordinates and, combined with pre-stored map information or GIS (Geographic Information System) data, automatically calculates the shortest distance to the boundaries of surrounding residential areas. Yet another example is that the charging pile obtains its pre-stored installation distance information from a cloud server via wireless communication.

[0056] (1.2) Determine the distance interval in which the actual distance lies; wherein the distance interval is preset. (1.3) Based on the distance range in which the actual distance is located and the correspondence between the pre-stored silent mode and the distance range, determine the target silent mode corresponding to the actual distance.

[0057] Here, the distance interval is a pre-defined distance range. For example, the following three distance intervals can be pre-defined: the first distance interval is greater than 100 meters and less than or equal to 200 meters, the second distance interval is greater than 200 meters and less than or equal to 500 meters, and the third distance interval is greater than 500 meters and less than or equal to 1000 meters.

[0058] Each silent mode corresponds to a distance range. It's important to explain that each silent mode corresponds to a distance range, rather than a specific distance value. There are two reasons for this: First, in real-world environments, sound wave attenuation is affected by various factors such as temperature, humidity, and building obstruction; using range divisions allows for tolerance of measurement errors and environmental fluctuations. Second, the number of silent modes is limited, while the distance values ​​change continuously. To match the discrete modes, it's necessary to divide the continuous distance into ranges. Using distance ranges to correspond to silent modes avoids frequent mode switching caused by minute distance changes, improving system stability.

[0059] The correspondence between distance ranges and silent modes can be established based on the attenuation law of sound waves over distance. It is assumed that higher silent modes correspond to higher power thresholds and higher fan speeds, while lower silent modes correspond to lower power thresholds and lower fan speeds. Specifically, as sound waves propagate outward from the charging station, the sound pressure level gradually decreases with increasing propagation distance. According to this law, the farther the distance, the higher the permissible noise level at the charging station itself can be, while the noise reaching residential areas will still meet the silent requirements. Therefore, distance ranges farther from residential areas correspond to higher silent modes; conversely, the closer the distance, the lower the permissible noise level at the charging station itself must be. Therefore, distance ranges closer to residential areas correspond to lower silent modes.

[0060] In some embodiments, a mapping table of silent operation levels, distance ranges, power thresholds, and fan speeds is pre-built. First, based on the actual distance obtained in step (1.1), the distance range is determined; then, the target silent operation level is determined based on the mapping table and the distance range. Further, the target power threshold and target fan speed corresponding to the target silent operation level can be determined.

[0061] Through the steps (1.1) to (1.3) above, the charging pile can automatically adapt to the corresponding quiet mode according to the actual distance to the residential area. Charging piles that are closer automatically select the lower mode to prioritize the quiet effect, while charging piles that are farther away automatically select the higher mode to provide a faster charging speed, thereby maximizing charging efficiency while ensuring that the noise level in the residential area meets the standards. In addition, using a distance range rather than a single distance value to correspond to the quiet mode can tolerate distance measurement errors and fluctuations in the actual environment, avoid frequent mode switching caused by small distance changes, and improve the stability of the charging pile's quiet mode control unit.

[0062] In one possible implementation, the silent mode control method for charging piles provided in this embodiment of the invention further includes steps (2.1) to (2.5), which are used to construct a mapping table of silent mode, distance range, power threshold and speed, so as to realize the step of determining the target power threshold in step 202 and the step of determining the target speed in step 203 based on the mapping table.

[0063] (2.1) Obtain the correspondence between multiple preset silent levels and multiple set distance intervals.

[0064] Here, there are multiple silent modes, each corresponding to a pre-defined distance range. For example, the following correspondence can be set: silent mode 1 corresponds to a distance range of "greater than 100 meters and less than or equal to 200 meters", silent mode 2 corresponds to a distance range of "greater than 200 meters and less than or equal to 500 meters", and silent mode 3 corresponds to a distance range of "greater than 500 meters and less than or equal to 1000 meters". It should be noted that the above values ​​are only examples, and the specific configuration can be tailored to the actual application scenario.

[0065] (2.2) Based on the noise standards for residential areas, determine the maximum permissible noise value of the charging pile corresponding to each set distance interval; wherein, each set distance interval corresponds to a maximum permissible noise value.

[0066] Here, the noise standard for residential areas specifies the noise threshold that the noise level propagated from the charging pile to the boundary of the residential area must not exceed. For example, during nighttime hours, the noise level propagated from the charging pile to the boundary of the residential area must not exceed 20 decibels. The maximum permissible noise level refers to the maximum noise level that is allowed to be generated at the charging pile itself, provided that the noise standard for residential areas is met.

[0067] In some embodiments, by combining the distance attenuation law of sound wave propagation, the maximum permissible noise value at the charging pile body can be calculated backwards. For example, the distance attenuation formula of sound waves propagating in free space can be used. Calculate the attenuation. Among them, The sound pressure level attenuation is expressed in decibels (dB); k is the standard coefficient for sound pressure level calculation in acoustics, k=20; D is the straight-line distance between the charging pile and the boundary of the residential area; D0 is the reference distance, usually 1 meter. If D is set to 100, then the following can be calculated: This equals 40 decibels. Adding the noise threshold stipulated by the noise standard for residential areas, such as 20 decibels, we can calculate that the maximum permissible noise level of a charging pile 100 meters away from the boundary of a residential area is approximately 60 decibels.

[0068] The above formula applies to the propagation of a point sound source in a free field, i.e., the ideal situation where factors such as ground reflection, building obstruction, and weather conditions are not considered. In practical engineering applications, a correction factor can be added to the theoretical attenuation amount based on the complexity of the environment to compensate for the additional attenuation or reflection enhancement effects of environmental factors on sound wave propagation.

[0069] In other embodiments, the maximum permissible noise level at the charging pile body for each distance range is determined through on-site testing. Optionally, the charging pile is placed at a specific distance from the residential area, and the fan speed and output power are gradually adjusted while the noise level at the boundary of the residential area is monitored. When the noise level measured at the boundary of the residential area is equal to the noise threshold specified by the residential area noise standard (e.g., 45 dB), the noise level at the charging pile body at this time is recorded, and this value is the maximum permissible noise level at that distance.

[0070] The above tests are performed at multiple test distances within the same distance range. The minimum value among the maximum noise values ​​obtained at each test distance is taken as the maximum allowable noise value at the charging pile body corresponding to that distance range. This ensures that all locations within that distance range meet the noise standards for residential areas.

[0071] The above-mentioned field testing methods can directly obtain noise limits that match the actual environment (such as ground reflection, building obstruction, and climate conditions) without relying on theoretical formulas, thus having higher engineering practicality.

[0072] (2.3) Determine the fan speed limit corresponding to each maximum permissible noise value; wherein, each maximum permissible noise value corresponds to a fan speed limit.

[0073] Here, the fan speed limit refers to the maximum speed at which the fan is allowed to operate, provided that the maximum permissible noise level at the charging station is met. The fan speed limit is usually expressed as a percentage of the maximum speed, such as "45% of the maximum speed." Higher fan speeds generate more noise; lower fan speeds generate less noise.

[0074] Optionally, a correspondence between the noise level at the charging pile body and the fan speed can be established through pre-calibration testing. Based on the maximum permissible noise values ​​determined in step (2.2), this correspondence can be found to obtain the upper limit of the fan speed allowed for each maximum permissible noise value, i.e., the fan speed limit.

[0075] For example, calibration tests have determined that when the maximum permissible noise level is 45dB, the corresponding fan speed limit is 45% of the maximum speed; when the maximum permissible noise level is 55dB, the corresponding fan speed limit is 60% of the maximum speed. It should be noted that the above values ​​are merely examples, and in actual applications, calibration should be performed based on the specific noise characteristics of the charging pile product.

[0076] (2.4) Determine the maximum safe output power of the charging pile corresponding to each fan speed limit; wherein, each fan speed limit corresponds to a maximum safe output power.

[0077] Here, maximum safe output power refers to the maximum output power at which the charging pile can operate safely and the temperature of the power devices does not exceed the safety limit when the fan is running at the fan speed limit. Maximum safe output power is positively correlated with the fan speed limit: the higher the fan speed limit, the stronger the heat dissipation capacity and the greater the maximum safe output power; the lower the fan speed limit, the weaker the heat dissipation capacity and the smaller the maximum safe output power.

[0078] Optionally, a temperature rise test can be used to establish a correlation between fan speed and the maximum safe output power of the charging pile. Based on the fan speed limits determined in step (2.3), this correlation can be found to obtain the maximum safe output power allowed for each fan speed limit.

[0079] (2.5) Store the silent mode, the set distance range, the maximum allowable noise value, the fan speed limit and the maximum safe output power one by one to generate a mapping table.

[0080] Optionally, the correspondence between the silent mode and the set distance range determined in step (2.1), the correspondence between the set distance range and the maximum permissible noise value determined in step (2.2), the correspondence between the maximum permissible noise value and the fan speed limit determined in step (2.3), and the correspondence between the fan speed limit and the maximum safe output power determined in step (2.4) are integrated into a mapping table and stored in the storage unit of the charging pile. For example, the mapping table can be as follows:

[0081] It should be noted that the values ​​in the table above are for illustrative purposes only. In actual applications, calibration can be performed based on the measured data of the charging module, and different values ​​may correspond to different specifications of charging piles. The number of distance intervals, boundary values, and the power thresholds and fan speeds corresponding to each level can all be adjusted according to the actual application scenario, and this application does not impose specific limitations.

[0082] Based on the mapping table constructed in step (2.5), in step 202, the target power threshold is determined according to the target silent mode, including: determining the maximum safe output power corresponding to the target silent mode according to the mapping table and the target silent mode, as the target power threshold.

[0083] Similarly, based on the mapping table constructed in step (2.5), step 203 determines the corresponding target speed according to the target silent mode, including: determining the fan speed limit corresponding to the target silent mode according to the mapping table and the target silent mode, as the target speed.

[0084] For example, when the target silent mode is mode 1, the maximum safe output power corresponding to the mapping table is 20kW, which is used as the target power threshold for mode 1. The corresponding fan speed limit is 45% of the maximum speed, which is used as the target speed for mode 1.

[0085] Steps (2.1) to (2.5) above establish a complete mapping chain from distance range to silent mode, then to noise limit, fan speed limit, and power threshold, providing a systematic data foundation for silent mode control. The mapping table is pre-stored in the charging pile's storage unit. During actual control, the target power threshold and target speed can be quickly obtained by looking up the table, eliminating the need for real-time calculations, thus improving the real-time performance of the control response and reducing the computational burden on the charging pile's silent mode control unit. Furthermore, charging piles of different specifications can independently calibrate the values ​​in the mapping table based on their own test data, exhibiting good portability and adaptability, and can be adapted to different types of charging piles without modifying the control logic.

[0086] exist Figure 2 Based on the previous embodiments, the present invention also takes into account that the process of exiting the silent mode also needs to ensure that the internal power devices of the charger are not overheated and damaged. Figure 3 This is a flowchart illustrating the implementation of a silent mode control method for charging piles provided in another embodiment of the present invention.

[0087] like Figure 3 As shown, the silent mode control method for charging piles provided in this embodiment of the invention includes steps 301 to 302.

[0088] Step 301: When the preset conditions for exiting silent mode are met, control the fan speed to return to the maximum speed.

[0089] Here, the preset conditions for exiting silent mode can take various forms. For example, it can be determined that the preset conditions for exiting silent mode are met when the current time is detected as the time to exit the preset silent period. Alternatively, it can be determined that the preset conditions for exiting silent mode are met when the charging station administrator issues a silent mode exit command via an application or physical button.

[0090] After confirming that the preset conditions for exiting silent mode are met, the charging pile's silent mode control unit first restores the fan speed to its maximum speed. Maximum speed refers to the highest speed the fan can reach; at this speed, the fan's heat dissipation capacity is strongest, but the noise level is also highest.

[0091] Step 302: After determining that the fan speed has recovered to the maximum speed, the upper limit of the output power of the charging pile is configured as the maximum power threshold, and the actual output power of the charging pile is controlled to be less than or equal to the maximum power threshold.

[0092] This step is executed in the following order: first confirm that the fan speed has returned to its maximum speed, and then restore the upper limit of the output power. This is because if the output power is increased before the fan speed has returned to normal, the power devices will generate a lot of heat that cannot be dissipated in time, which may cause the temperature to rise continuously and damage the devices.

[0093] Therefore, after the fan speed is restored in step 301, the charging pile silent mode control unit needs to determine whether the condition that the fan speed has been restored to the maximum speed is met. In one optional implementation, the current speed is monitored in real time by a speed sensor, and if the error between the current speed and the maximum speed is within the allowable range, the condition is considered met.

[0094] Once the conditions are met, the charging pile's silent mode control unit configures the upper limit of the charging pile's output power to the maximum power threshold. The maximum power threshold refers to the maximum power that the charging pile is allowed to output in non-silent mode, which is usually the charging pile's rated power. Subsequently, the actual output power is limited by this maximum power threshold, but the specific output value is determined by the vehicle's power requirements.

[0095] Through steps 301 and 302, the exit process of silent mode follows the order of first restoring fan speed and then restoring output power, forming a symmetrical control logic with the first limiting of output power and then reducing fan speed when entering silent mode, ensuring the heat dissipation safety of power devices.

[0096] In one possible implementation, the silent mode control method for charging piles provided in this embodiment further includes: (3.1) Detect whether the current time has entered the target time period; the target time period is the time period when the charging pile is preset to be in silent mode; (3.2) If the current time is detected to be entering the target time period, then it is determined that the preset conditions for entering the silent mode are met; (3.3) After the current time enters the target time period, detect whether the current time has exited the target time period; (3.4) If it is detected that the current time has exited the target time period, then it is determined that the preset conditions for exiting the silent mode are met.

[0097] Here, the target time period refers to the time period during which the charging station is preset to enter silent mode, such as 10:00 PM to 6:00 AM the next day. This target time period can be set by the charging station administrator through an application or the charging station's configuration interface. The charging station's built-in clock module or real-time time obtained via the network is used to detect the current time.

[0098] When step (3.1) detects that the current time has just entered the target time period, for example, from 21:59 to 22:00, the charging pile silent mode control unit determines that the preset conditions for entering silent mode are met, and then triggers the silent mode entry process of steps 201 to 203, that is, determining the target silent level, limiting the output power, and reducing the fan speed.

[0099] While the charging station is operating in silent mode, the silent mode control unit continuously monitors the current time to determine whether it has exceeded the target time period. For example, if the target time period is from 10 PM to 6 AM the next day, and the current time becomes 6:01 AM, it is determined that the charging station has exited the target time period.

[0100] When step (3.3) detects that the current time is exiting the target time period, the charging pile silent mode control unit determines that the preset conditions for exiting silent mode are met, and then triggers the silent mode exit process of steps 301 to 302, that is, first restore the fan speed to the maximum speed, and then restore the upper limit of the output power to the maximum power threshold.

[0101] Through the steps (3.1) to (3.4) above, the charging pile can automatically enter and exit silent mode according to the preset time period without manual intervention. This method is especially suitable for fixed time periods with high noise requirements, such as at night, which not only ensures the quietness requirements of residential areas, but also avoids the limitation of charging efficiency during non-necessary time periods during the day, realizing the automation and intelligence of silent mode control.

[0102] Figure 4 This is a schematic diagram of a charging pile provided according to an embodiment of the present invention. (Refer to...) Figure 4 The charging pile includes a DC-side controller and an AC-side controller. The DC-side controller is connected to power devices and is used to control the actual output power of the charging pile. The AC-side controller is connected to a fan and is used to control the fan speed. The DC-side controller and the AC-side controller are communicatively connected. For example, the two controllers exchange necessary operating status information through an SCI serial communication interface.

[0103] The following is based on Figure 4 The charging pile architecture shown uses the AC side controller as the execution entity, and the silent mode control method for charging piles provided by the embodiments of the present invention is introduced.

[0104] First, let's introduce the variables set inside the AC-side controller and the DC-side controller: DC_JY_SET is set on the DC-side controller and is used to store the target mute level determined during the mute mode entry process. DC_JY_FLAG is set on the DC-side controller and is used to mark the silent mode of the DC-side controller; DC_AC_JY is set on the DC-side controller and is used to store the feedback signals sent back from the AC-side controller. AC_JY_SET is set on the AC side controller and is used to store the mute setting issued by the DC side controller. The AC_FB_STATE setting is located on the AC-side controller and is used to store the actual status of the fan. It serves as a feedback signal to the DC-side controller to indicate whether the fan has returned to its maximum speed.

[0105] Furthermore, the connection relationship between the transmit and receive arrays in SCI communication is as follows: the DC-side transmit array DC_SCI.TX of the DC-side controller and the AC-side receive array AC_SCI.RX of the AC-side controller are connected through the SCI communication interface. Data sent by the DC-side controller is transmitted to AC_SCI.RX via DC_SCI.TX for the AC-side controller to read. Similarly, the AC-side transmit array AC_SCI.TX of the AC-side controller is connected to the DC-side receive array DC_SCI.RX of the DC-side controller for reverse data transmission.

[0106] The following is combined with Figure 4 The charging pile architecture with dual-side controllers is described, along with an explanation of how to enter silent mode.

[0107] For example, during the process of entering silent mode, the DC-side controller receives a silent mode entry command from the CAN bus. Upon receiving the silent mode entry command, it reads the pre-stored straight-line distance between the charging pile and the nearest residential area. The DC-side controller's internal or external memory pre-stores, for example, the mapping table established in step (2.5) above, which is a pre-established mapping table regarding silent mode settings, set distance ranges, maximum permissible noise values, fan speed limits, and maximum safe output power.

[0108] Based on the straight-line distance between the charging station and the nearest residential area, a set distance range is determined. Based on the pre-stored mapping table and the set distance range, the corresponding silent mode is determined as the target silent mode, the maximum safe output power corresponding to the target silent mode is used as the target power threshold, and the fan speed limit corresponding to the target silent mode is used as the target speed.

[0109] In one feasible implementation, step 202, controlling the actual output power of the charging pile to be less than or equal to the target power threshold, includes: (4.1) The DC-side controller sets the internal mute flag position according to the target mute level; (4.2) During the period when the internal mute flag is set, the DC-side controller controls the actual output power to be less than or equal to the target power threshold.

[0110] Assuming there are three mute levels: level 1, level 2, and level 3, the corresponding values ​​for DC_JY_SET would be 1, 2, and 3, respectively. Specifically, when the target mute level is determined to be level 2, DC_JY_SET is assigned the value 2. Furthermore, when not in mute mode, DC_JY_SET = 0.

[0111] Based on DC_JY_SET, the internal mute flag DC_JY_FLAG is assigned a value. When DC_JY_SET=2, DC_JY_FLAG is assigned a value of 2, indicating that the DC-side controller is in mute mode 2. While DC_JY_FLAG is set to 2, the DC-side controller continuously controls the actual output power to be less than or equal to the target power threshold corresponding to mute mode 2.

[0112] Additionally, when DC_JY_SET=0, DC_JY_FLAG is set to 0, indicating that it is not in silent mode. During the period when DC_JY_FLAG is set to 0, the DC-side controller resumes normal power output control and is no longer subject to the power threshold limitation in silent mode.

[0113] After steps (4.1) and (4.2), when the DC-side controller determines that the actual output power is less than or equal to the target power threshold, it sends the target mute gear to the AC-side controller. The target mute gear has two functions: firstly, it serves as an instruction to the AC-side controller to enter mute mode; secondly, it indicates the gear corresponding to the target speed that the AC-side controller needs to execute.

[0114] Specifically, the DC-side controller writes the target silent mode value into the DC-side transmit array DC_SCI.TX and sends it to the AC-side controller via the SCI communication interface. The AC-side controller reads this mode value from the AC-side receive array AC_SCI.RX and assigns it to AC_JY_SET. The AC-side controller determines the corresponding target speed based on the value of AC_JY_SET. For example, when AC_JY_SET=2, the target speed corresponding to silent mode 2 is determined.

[0115] In this way, the DC-side controller sends a silent mode command to the AC-side controller only after ensuring that the output power has been reduced to a safe range. This follows the principle of limiting power first and then reducing speed, avoiding the risk of overheating or device damage due to insufficient heat dissipation, and ensuring the safe operation of the charging pile in silent mode.

[0116] The following is combined with Figure 4The charging pile architecture with dual-side controllers is described, along with an explanation of how to exit silent mode.

[0117] For example, during the process of exiting silent mode, after receiving the silent mode exit command from the CAN bus, the DC-side controller sends an exit silent mode indication signal to the AC-side controller, instructing the AC-side controller to restore the fan speed to the maximum speed. After confirming that the fan speed has been restored to the maximum speed, the upper limit of the output power is configured as the maximum power threshold to avoid overheating and damage to the power devices.

[0118] In one feasible implementation, the step 301 of controlling the fan speed to return to the maximum speed includes steps (5.1) to (5.2).

[0119] (5.1) The DC side controller sends an exit mute indication signal to the AC side controller, the exit mute indication signal being used to instruct the AC side controller to restore the fan speed to the maximum speed.

[0120] For example, when the DC-side controller determines that the preset conditions for exiting the mute mode are met, it clears DC_JY_SET to 0, which serves as an exit mute indication signal. The DC-side controller then writes the value of DC_JY_SET (i.e., 0) into the DC-side transmit array DC_SCI.TX via the SCI communication interface, which is then sent to the AC-side controller.

[0121] The AC-side controller reads the value of DC_JY_SET (i.e., 0) from the AC-side receive array AC_SCI.RX and assigns it to the internal variable AC_JY_SET, thus synchronizing with the mute setting issued by the DC-side controller. The AC-side controller controls the fan speed based on the value of AC_JY_SET. At this point, AC_JY_SET = 0, the AC-side controller determines that it needs to exit mute mode and begins to gradually increase the fan speed to the maximum speed.

[0122] (5.2) The DC-side controller receives a feedback signal from the AC-side controller, the feedback signal being used to determine whether the fan speed has recovered to the maximum speed; The feedback signal includes a first state value and a second state value. When the feedback signal is the first state value, it indicates that the fan speed has recovered to the maximum speed; when the feedback signal is the second state value, it indicates that the fan speed has not recovered to the maximum speed.

[0123] Optionally, the AC-side controller is configured to periodically send a feedback signal AC_FB_STATE back to the DC-side controller. The AC-side controller can detect the real-time fan speed using a set speed sensor and compare it to the maximum speed. When the fan speed is determined to be equal to the maximum speed, AC_FB_STATE is assigned a first state value; when the fan speed is lower than the maximum speed, AC_FB_STATE is assigned a second state value. Optionally, the first state value can be 0, and the second state value can be 1.

[0124] When the DC-side controller receives the feedback signal AC_FB_STATE via SCI communication, it assigns the value of AC_FB_STATE to DC_AC_JY and uses DC_AC_JY to store the feedback signal of the AC-side controller.

[0125] In one feasible implementation, step 302, after determining that the fan speed has recovered to the maximum speed, configures the upper limit of the output power of the charging pile as the maximum power threshold, and controls the actual output power of the charging pile to be less than or equal to the maximum power threshold, including steps (6.1) and (6.2).

[0126] (6.1) The DC-side controller receives the current feedback signal and obtains the previously received feedback signal; (6.2) If the feedback signal received this time is the first state value and the feedback signal received last time is the second state value, then the DC side controller configures the upper limit of the output power of the charging pile to the maximum power threshold, and controls the actual output power of the charging pile to be less than or equal to the maximum power threshold.

[0127] Optionally, DC_AC_JY_old can be set to store the previously received feedback signal, while DC_AC_JY can be set to store the currently received feedback signal.

[0128] Taking 0 as an example for the first state value and 1 as an example for the second state value, when DC_AC_JY=0 and DC_AC_JY_old=1, the DC-side controller clears DC_JY_FLAG, configures the upper limit of the output power of the charging pile to the maximum power threshold, and controls the actual output power of the charging pile to be less than or equal to the maximum power threshold.

[0129] The above method limits output power-related control to the time when the feedback signal changes from 1 to 0, thereby enabling a timely response when the fan speed recovers to the maximum speed.

[0130] In conclusion, Figure 4The embodiment shown realizes the coordinated control of power limiting by the DC-side controller and fan noise reduction by the AC-side controller. By entering the mode with power limiting first and then speed reduction, and exiting the mode with speed increasing first and then power increasing, the heat dissipation safety of the charging pile in silent mode is guaranteed. By automatically matching the gear based on distance, the requirements for noise reduction and charging efficiency are balanced. By using SCI bidirectional communication and edge detection, reliable coordination and state synchronization of the two controllers are achieved.

[0131] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0132] The following are device embodiments of the present invention. For details not described in detail, please refer to the corresponding method embodiments described above.

[0133] Figure 5 A schematic diagram of a charging pile silent mode control device according to an embodiment of the present invention is shown. For ease of explanation, only the parts related to the embodiment of the present invention are shown, and are described in detail below: like Figure 5 As shown, the silent mode control device for charging piles includes a first processing module and a second processing module. The first processing module is used to determine the target quiet mode from a set of preset quiet modes when the preset conditions for entering the quiet mode are met; wherein each quiet mode corresponds to a power threshold and a speed. The second processing module is used to determine the corresponding target power threshold according to the target silent mode, configure the upper limit of the output power of the charging pile as the target power threshold, and control the actual output power of the charging pile to be less than or equal to the target power threshold; the second processing module is also used to determine the corresponding target speed according to the target silent mode after determining that the actual output power is less than or equal to the target power threshold, and adjust the speed of the fan of the charging pile to the target speed.

[0134] In one possible implementation, the second processing module is further configured to control the fan speed to return to the maximum speed when the preset conditions for exiting the silent mode are met; the second processing module is further configured to configure the upper limit of the output power of the charging pile as the maximum power threshold after determining that the fan speed has returned to the maximum speed, and control the actual output power of the charging pile to be less than or equal to the maximum power threshold.

[0135] In one possible implementation, the charging pile includes a DC-side controller and an AC-side controller. The DC-side controller is used to control the actual output power of the charging pile, and the AC-side controller is used to control the fan speed. The DC-side controller sends an exit mute indication signal to the AC-side controller, which instructs the AC-side controller to restore the fan speed to its maximum speed. The DC-side controller receives a feedback signal from the AC-side controller, which is used to determine whether the fan speed has been restored to its maximum speed. The feedback signal includes a first state value and a second state value. When the feedback signal is the first state value, it indicates that the fan speed has recovered to the maximum speed; when the feedback signal is the second state value, it indicates that the fan speed has not recovered to the maximum speed.

[0136] In one possible implementation, the DC-side controller receives the current feedback signal and obtains the previously received feedback signal. If the current feedback signal is a first state value and the previously received feedback signal is a second state value, the DC-side controller configures the upper limit of the charging pile's output power as the maximum power threshold and controls the actual output power of the charging pile to be less than or equal to the maximum power threshold.

[0137] In one possible implementation, before determining the target quiet level from a set of preset quiet levels, the first processing module is further configured to obtain the actual distance between the installation location of the charging pile and the residential area; the first processing module is further configured to determine the distance range in which the actual distance is located; wherein the distance range is preset; the first processing module is further configured to determine the target quiet level corresponding to the actual distance based on the distance range in which the actual distance is located and the pre-stored correspondence between quiet levels and distance ranges.

[0138] In one possible implementation, the charging pile silent mode control device also includes a third processing module; The third processing module is used to obtain the correspondence between multiple preset silent levels and multiple set distance intervals; The third processing module is also used to determine the maximum permissible noise value of the charging pile corresponding to each set distance interval based on the noise standard for residential areas; wherein, each set distance interval corresponds to a maximum permissible noise value; The third processing module is also used to determine the fan speed limit corresponding to each maximum permissible noise value; wherein, each maximum permissible noise value corresponds to a fan speed limit. The third processing module is also used to determine the maximum safe output power of the charging pile corresponding to each fan speed limit; wherein, each fan speed limit corresponds to a maximum safe output power; The third processing module is also used to store the silent mode, the set distance range, the maximum allowable noise value, the fan speed limit and the maximum safe output power one by one, and generate a mapping table; The second processing module is further used to determine the maximum safe output power corresponding to the target silent mode based on the mapping table and the target silent mode, and use it as the target power threshold.

[0139] In one possible implementation, the charging pile includes a DC-side controller for controlling the actual output power of the charging pile. The DC-side controller sets its internal mute flag based on the target mute level; while the internal mute flag is set, the DC-side controller controls the actual output power to be less than or equal to the target power threshold.

[0140] In one possible implementation, the charging pile silent mode control device also includes a detection module; The detection module is used to detect whether the current time has entered the target time period; the target time period is the time period when the charging pile is preset to be in silent mode; the detection module is also used to determine whether the preset conditions for entering silent mode are met if the current time is detected to have entered the target time period; the detection module is also used to detect whether the current time has exited the target time period after entering the target time period; the detection module is also used to determine whether the preset conditions for exiting silent mode are met if the current time has detected to have exited the target time period.

[0141] Figure 6 This is a schematic diagram of a control unit provided in an embodiment of the present invention. Figure 6 As shown, the control unit of this embodiment includes a processor 60 and a memory 61. The memory 61 stores a computer program 62. When the processor 60 executes the computer program 62, it implements the steps in the various method embodiments described above. Alternatively, when the processor 60 executes the computer program 62, it implements the functions of each module / unit in the various device embodiments described above.

[0142] For example, computer program 62 can be divided into one or more modules / units, which are stored in memory 61 and executed by processor 60 to complete the present invention. The one or more modules / units can be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of computer program 62 in the control unit.

[0143] The control unit may include, but is not limited to, a processor 60 and a memory 61. Those skilled in the art will understand that... Figure 6 This is merely an example of a control unit and does not constitute a limitation on the control unit. It may include more or fewer components than shown, or combine certain components, or different components. For example, the control unit may also include input / output devices, network access devices, buses, etc.

[0144] The processor 60 can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor.

[0145] The memory 61 can be an internal storage unit of the control unit, such as the hard drive or memory of the control unit. The memory 61 can also be an external storage device of the control unit, such as a plug-in hard drive, Smart Media Card (SMC), Secure Digital (SD) card, or Flash Card equipped on the control unit. Furthermore, the memory 61 can include both internal and external storage units of the control unit. The memory 61 is used to store the computer program 62 and other programs and data required by the control unit. The memory 61 can also be used to temporarily store data that has been output or will be output.

[0146] For the sake of simplicity and clarity, only the above-described functional modules / units are used as examples. In practical applications, the functions described above can be assigned to different functional modules / units as needed. These modules / units can be implemented in hardware, software, or a combination of both.

[0147] This invention provides a charging pile, including a DC-side controller and an AC-side controller; the DC-side controller includes, for example,... Figure 6 The control unit shown is used to control the actual output power of the charging pile; the AC side controller is used to control the fan speed.

[0148] This invention also provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the methods described in the above-described method embodiments.

[0149] This invention also provides a computer program product, including a computer program. When the computer program is executed by a processor, it implements the methods described in the above-described method embodiments.

[0150] Computer programs include computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. Computer-readable media can include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc.

[0151] In the above embodiments, the descriptions of each embodiment have their own emphasis. Parts not detailed or described in a particular embodiment can be referred to in the relevant descriptions of other embodiments. Unless otherwise specified or in conflict with logic, the terminology and / or descriptions between different embodiments are consistent and can be referenced interchangeably. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0152] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A method for controlling the silent mode of a charging pile, characterized in that, include: When the preset conditions for entering silent mode are met, the target silent mode is determined from a plurality of preset silent modes; wherein, each silent mode corresponds to a power threshold and a speed. Based on the target quiet mode, a corresponding target power threshold is determined, the upper limit of the charging pile's output power is configured as the target power threshold, and the actual output power of the charging pile is controlled to be less than or equal to the target power threshold. After determining that the actual output power is less than or equal to the target power threshold, the corresponding target speed is determined according to the target silent mode, and the speed of the fan of the charging pile is adjusted to the target speed.

2. The charging pile silent mode control method according to claim 1, characterized in that, The method further includes: When the preset conditions for exiting silent mode are met, the fan speed is restored to the maximum speed. After determining that the fan speed has recovered to the maximum speed, the upper limit of the output power of the charging pile is configured as the maximum power threshold, and the actual output power of the charging pile is controlled to be less than or equal to the maximum power threshold.

3. The charging pile silent mode control method according to claim 2, characterized in that, The charging pile includes a DC-side controller and an AC-side controller. The DC-side controller is used to control the actual output power of the charging pile, and the AC-side controller is used to control the speed of the fan. The step of restoring the fan speed to its maximum speed includes: The DC-side controller sends an exit mute indication signal to the AC-side controller, the exit mute indication signal being used to instruct the AC-side controller to restore the fan speed to the maximum speed; The DC-side controller receives a feedback signal from the AC-side controller, and the feedback signal is used to determine whether the fan speed has recovered to the maximum speed; The feedback signal includes a first state value and a second state value. When the feedback signal is the first state value, it indicates that the fan speed has recovered to the maximum speed; when the feedback signal is the second state value, it indicates that the fan speed has not recovered to the maximum speed.

4. The charging pile silent mode control method according to claim 3, characterized in that, The step of configuring the upper limit of the output power of the charging pile as a maximum power threshold after determining that the fan speed has recovered to the maximum speed, and controlling the actual output power of the charging pile to be less than or equal to the maximum power threshold, includes: The DC-side controller receives the current feedback signal and obtains the previously received feedback signal; If the feedback signal received this time is the first state value, and the feedback signal received last time was the second state value, then the DC side controller will configure the upper limit of the output power of the charging pile to the maximum power threshold, and control the actual output power of the charging pile to be less than or equal to the maximum power threshold.

5. The charging pile silent mode control method according to claim 1, characterized in that, Before determining the target silent mode from a set of preset silent modes, the method further includes: Obtain the actual distance between the installation location of the charging pile and the residential area; Determine the distance interval within which the actual distance lies; wherein the distance interval is preset. Based on the distance range in which the actual distance is located, and the pre-stored correspondence between the silent mode and the distance range, the target silent mode corresponding to the actual distance is determined.

6. The charging pile silent mode control method according to claim 5, characterized in that, The method further includes: Obtain the correspondence between multiple preset silent levels and multiple set distance ranges; Based on residential noise standards, the maximum permissible noise value of the charging pile corresponding to each set distance interval is determined; wherein, each set distance interval corresponds to a maximum permissible noise value; Determine the fan speed limit corresponding to each maximum permissible noise value; where each maximum permissible noise value corresponds to one fan speed limit. Determine the maximum safe output power of the charging pile corresponding to each fan speed limit; wherein, each fan speed limit corresponds to a maximum safe output power; Store the silent mode, the set distance range, the maximum allowable noise value, the fan speed limit, and the maximum safe output power one by one to generate a mapping table; The step of determining the corresponding target power threshold based on the target quiet mode includes: Based on the mapping table and the target silent mode, the maximum safe output power corresponding to the target silent mode is determined and used as the target power threshold.

7. The charging pile silent mode control method according to claim 1, characterized in that, The charging pile includes a DC-side controller, which is used to control the actual output power of the charging pile; controlling the actual output power of the charging pile to be less than or equal to the target power threshold includes: The DC-side controller sets its internal mute flag based on the target mute level. During the period when the internal mute flag is set, the DC-side controller controls the actual output power to be less than or equal to the target power threshold.

8. The charging pile silent mode control method according to any one of claims 1-7, characterized in that, The method further includes: Detect whether the current time has entered the target time period; the target time period is the time period when the charging pile is preset to be in silent mode; If the current time is detected to be within the target time period, then it is determined that the preset conditions for entering silent mode are met; After entering the target time period at the current time, it is detected whether the current time has exited the target time period; If it is detected that the current time has exited the target time period, then it is determined that the preset conditions for exiting the silent mode have been met.

9. A control unit, characterized in that, It includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the method as described in any one of claims 1 to 8.

10. A charging pile, characterized in that, It includes a DC-side controller and an AC-side controller; the DC-side controller includes the control unit as described in claim 9, used to control the actual output power of the charging pile; the AC-side controller is used to control the speed of the fan.

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