Charging facility condensation control method based on module power equalization

Abstract

This invention discloses a condensation control method for charging facilities based on module power equalization, relating to the field of charging pile control technology, including the following steps: S1: Obtain the humidity of the environment of each charging pile through a humidity sensor, and determine whether the first-level condensation risk is met based on the humidity. If the first-level condensation risk is met, obtain the dew point temperature of the environment of each charging pile through a dew point meter, and obtain the surface temperature of each power module. Determine whether the second-level condensation risk is met by comparing the dew point temperature and the surface temperature of the power module. If the second-level condensation risk is met, proceed to S3; if the second-level condensation risk is not met, proceed to S2. The surface temperature of the power module is calculated by calculating the load power, efficiency, and ambient temperature of the power module, which helps to avoid the data delay of traditional thermometer temperature measurement and makes the acquisition of the surface temperature of the power module more convenient and accurate.

Description

Technical Field

[0001] This invention relates to the field of charging pile control technology, specifically to a method for controlling condensation in charging facilities based on equal distribution of module power. Background Technology

[0002] Condensation is a common natural physical phenomenon, referring to the condensation of water vapor in the air when it encounters a cold surface with a temperature lower than its dew point. Its formation requires two core conditions: high air humidity and sufficient water vapor content; and a temperature difference, meaning the solid surface temperature is lower than the dew point temperature of the surrounding air. In real-world environments, the early morning or evening, with their large diurnal temperature range and intense radiative cooling, are peak times for condensation. For electrical equipment, condensation significantly reduces insulation performance, accelerates circuit corrosion and device aging, and poses a significant risk of short-circuit faults and operational losses. Therefore, effective protection through temperature and humidity monitoring or active temperature control is necessary.

[0003] During operation, existing charging piles are prone to condensation on the power module circuit boards due to changes in ambient temperature and humidity. This can lead to problems such as electrical short circuits, reduced insulation performance, and accelerated aging, affecting charging efficiency and the lifespan of the power modules. However, traditional condensation control methods mostly rely on passive protection or periodic maintenance, lacking real-time monitoring and active control of the condensation formation process. This makes it difficult to detect and intervene in the power module efficiency reduction caused by condensation in a timely manner, resulting in operational losses and safety hazards. Therefore, we propose a condensation control method for charging facilities based on the equal distribution of module power. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a method for controlling condensation in charging facilities based on module power equalization, thereby solving the aforementioned problems in the prior art.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a charging facility condensation control method based on module power equalization, comprising the following steps: S1: Obtain the humidity of the environment of each charging pile through a humidity sensor, and determine whether the level 1 condensation risk is met based on the humidity. If the level 1 condensation risk is met, obtain the dew point temperature of the environment of each charging pile through a dew point meter, obtain the surface temperature of each power module, and determine whether the level 2 condensation risk is met based on the dew point temperature and the surface temperature of the power module. If the level 2 condensation risk is met, proceed to S3; otherwise, proceed to S2. S2: Obtain the secondary condensation risk level by comparing the dew point temperature with the surface temperature of the power module. Determine whether the secondary condensation risk level meets the requirements for low risk of secondary condensation. If the secondary condensation risk level does not meet the requirements for low risk of secondary condensation, then execute S3. If the secondary condensation risk level meets the requirements for low risk of secondary condensation, then mark the power module of the charging pile as a safe module and execute S1. S3: Determine whether the current state of the charging pile power module output is vehicle receiving operation. If the current state of the charging pile power module output is vehicle receiving operation, then call the load power of the safety module to increase the load power of the low temperature power module. If the current state of the charging pile power module output is not vehicle receiving operation, then start the minimum load operation of the charging pile power module according to the safety temperature difference.

[0006] Preferably, in S1, the humidity of the environment around each charging station is acquired through a humidity sensor, and the humidity level is used to determine whether the risk level meets the criteria for Level 1 condensation. Specifically: S101: Set the monitoring cycle, continuously acquire the humidity of the charging pile environment at monitoring cycle intervals, and set the preset humidity threshold. S102: Determine whether the humidity of the charging pile environment is greater than the preset humidity threshold. If the humidity of the charging pile environment is greater than or equal to the preset humidity threshold, it is marked as meeting the first-level condensation risk. If the humidity of the charging pile environment is less than the preset humidity threshold, it is marked as not meeting the first-level condensation risk and S101 is executed again.

[0007] Preferably, in S1, the surface temperature of each power module is obtained, and the specific steps are as follows: S103: Obtain the ambient temperature of each charging pile through a thermometer, obtain the current load of each power module, and determine whether the current load of the power module is 0. If the current load of the power module is 0, mark the ambient temperature as the surface temperature of the power module. If the current load of the power module is not 0, execute S104. S104: Find the efficiency of the power module under the current load through the power module datasheet, obtain the temperature rise value by the current load and efficiency, and obtain the surface temperature of the power module by summing the temperature rise value with the ambient temperature.

[0008] Preferably, in S104, the temperature rise value is obtained through the current load and efficiency, and the formula for calculating the temperature rise value is:

[0009] Where T represents the temperature rise, F represents the efficiency, and 1 > F > 0.

[0010] Preferably, in S1, the determination of whether the level 2 condensation risk is met is based on the dew point temperature and the surface temperature of the power module. Specifically, the dew point temperature is obtained, the surface temperature of the power module is obtained, and it is determined whether the surface temperature of the power module is less than the dew point temperature. If the surface temperature of the power module is less than or equal to the dew point temperature, the determination result is marked as meeting the level 2 condensation risk. If the surface temperature of the power module is greater than the dew point temperature, the determination result is marked as not meeting the level 2 condensation risk.

[0011] Preferably, in S2, the secondary condensation risk level is obtained by comparing the dew point temperature with the surface temperature of the power module, specifically as follows: S201: Obtain the dew point temperature and the surface temperature of the power module. Calculate the temperature difference by subtracting the surface temperature of the power module from the dew point temperature. Determine if the temperature difference is less than 1°C. If the temperature difference is less than or equal to 1°C, mark the power module as a level 2 high-risk condensation module. If the temperature difference is greater than 1°C, execute S202. S202: Determine if the temperature difference is less than 3℃. If the temperature difference is less than or equal to 3℃, mark the power module as medium risk of secondary condensation. If the temperature difference is greater than 3℃, mark the power module as low risk of secondary condensation.

[0012] Preferably, in S3, it is determined whether the current state of the charging pile power module output is in vehicle reception mode, specifically as follows: S301: Obtain the output current of the charging pile power module, determine whether the output current of the charging pile power module is greater than 1A. If the output current of the charging pile power module is greater than 1A, mark the current state of the output terminal of the charging pile power module as vehicle receiving operation. If the output current of the charging pile power module is less than or equal to 1A, execute S302. S302: Obtain the output voltage of the charging pile power module, and determine whether the output voltage of the charging pile power module is greater than 200V. If the output voltage of the charging pile power module is greater than or equal to 200V, mark the current status of the output terminal of the charging pile power module as vehicle receiving operation. If the output voltage of the charging pile power module is less than 200V, mark the current status of the output terminal of the charging pile power module as no vehicle receiving operation.

[0013] Preferably, in S3, the load power of the safety module is used to increase the load power of the cryogenic power module, specifically as follows: S303: Obtain the power module for secondary condensation risk, obtain the power module for secondary condensation medium risk, obtain the power module for secondary condensation high risk, and collect and mark the power modules for secondary condensation risk, secondary condensation medium risk, and secondary condensation high risk as low temperature power modules. S304: Obtain the temperature and dew point temperature of the low-temperature power module, calculate the temperature difference value by subtracting the temperature and dew point temperature of the low-temperature power module, arrange all temperature difference values ​​in descending order, and define this arrangement order as the load increase order; S305: Obtain the load power of all safety modules, reduce the load power of all safety modules by half, and increase the low temperature power modules in sequence according to the load increase order until the surface temperature of the low temperature power module does not meet the level 2 condensation risk, and then increase the next low temperature power module. S306: During the load power call process, continuously acquire the surface temperature of all safety modules. If the surface temperature of a safety module meets the level 2 condensation risk, stop reducing the load power of that safety module and mark that safety module as level 2 condensation risk.

[0014] Preferably, in S3, the power module of the charging pile is operated at the lowest load based on the safe temperature difference, specifically as follows: S307: Obtain the low-temperature power module, enable the low-temperature power module to be in no-load state, set the no-load time, and after the no-load time ends, determine whether the low-temperature power module meets the level 2 condensation risk. If the low-temperature power module meets the level 2 condensation risk, mark the low-temperature power module as a light-load power module and execute S308. If the low-temperature power module does not meet the level 2 condensation risk, disable the no-load state of the low-temperature power module. S308: Obtain the power module to be light-loaded, turn off the no-load state of the power module to be light-loaded, turn on the light-load state of the power module to be light-loaded, set the light-load time, and after the light-load time ends, determine whether the power module to be light-loaded meets the level 2 condensation risk. If the power module to be light-loaded does not meet the level 2 condensation risk, turn off the light-load state of the power module to be light-loaded. If the power module to be light-loaded meets the level 2 condensation risk, turn on the alarm to remind the management personnel that the power module to be light-loaded has an abnormal risk.

[0015] (III) Beneficial Effects This invention provides a method for controlling condensation in charging facilities based on module power sharing, which has the following beneficial effects: (1) In this solution, the surface temperature of the power module is calculated by calculating the load power, efficiency and ambient temperature of the power module, instead of directly measuring the temperature with a thermometer. This method of calculating the temperature can not only avoid the problem of temperature interference between the power module and other modules, but also avoid the phenomenon of inaccurate temperature caused by measuring the temperature of a single measurement point with a thermometer. Furthermore, the current and future temperatures can be calculated immediately based on the real-time load conditions, which is beneficial to avoid the data delay of traditional thermometer temperature measurement and makes it more convenient and accurate to obtain the surface temperature of the power module.

[0016] (2) In this scheme, by judging whether the output end of the charging pile power module is connected to the vehicle for charging, it is convenient to use different heating methods for the low temperature power module, so that the surface temperature of the power module is higher than the dew point temperature, which is beneficial to avoid the formation of condensation on the surface of the power module. If the output end of the power module is connected to the vehicle for charging, it means that the surface temperature of the power module can be increased by increasing the load output power of the power module. If the output end of the power module is not connected to the vehicle for charging, it means that the surface temperature of the power module cannot be adjusted by adjusting the output power, but the temperature can be adjusted by changing the operating state of the power module. The temperature of the power module can be increased slightly by no-load mode, and the module temperature can be further increased by outputting a weak current under light load. In this scheme, the temperature of the power module is adjusted by sacrificing a small amount of electrical energy and charging efficiency, abandoning the traditional heat transfer heating method of heat source. The temperature adjustment is not only faster and more accurate, but also beneficial to avoid the formation of condensation and corrosion of the electronic components of the power module. Attached Figure Description

[0017] Figure 1 This is a flowchart of the charging facility condensation control method based on module power equalization according to the present invention. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figure 1 This invention provides a method for controlling condensation in charging facilities based on module power sharing, comprising the following steps: S1: Obtain the humidity of the environment of each charging pile through a humidity sensor, and determine whether the level 1 condensation risk is met based on the humidity. If the level 1 condensation risk is met, obtain the dew point temperature of the environment of each charging pile through a dew point meter, obtain the surface temperature of each power module, and determine whether the level 2 condensation risk is met based on the dew point temperature and the surface temperature of the power module. If the level 2 condensation risk is met, proceed to S3; otherwise, proceed to S2. S2: Obtain the secondary condensation risk level by comparing the dew point temperature with the surface temperature of the power module. Determine whether the secondary condensation risk level meets the requirements for low risk of secondary condensation. If the secondary condensation risk level does not meet the requirements for low risk of secondary condensation, then execute S3. If the secondary condensation risk level meets the requirements for low risk of secondary condensation, then mark the power module of the charging pile as a safe module and execute S1. S3: Determine whether the current state of the charging pile power module output is vehicle receiving operation. If the current state of the charging pile power module output is vehicle receiving operation, then call the load power of the safety module to increase the load power of the low temperature power module. If the current state of the charging pile power module output is not vehicle receiving operation, then start the minimum load operation of the charging pile power module according to the safety temperature difference.

[0020] In this embodiment, the humidity of each charging pile's environment is obtained through a humidity sensor to determine whether the humidity is high enough to meet the conditions for condensation. Once the humidity is high enough to meet the first-level condensation risk, the dew point temperature is measured using a dew point meter. The power module temperature is calculated based on the power module's load conditions. Finally, it is determined whether the module surface temperature is lower than the dew point temperature to determine whether there is a risk of condensation forming on the power module. This solution calculates the power module's surface temperature by calculating the power module's load power, efficiency, and ambient temperature, rather than directly measuring the temperature with a thermometer. This method of temperature calculation not only avoids the problem of temperature interference between the power module and other modules but also avoids the inaccuracy caused by measuring the temperature at a single measurement point with a thermometer. Furthermore, it can immediately estimate the current and future temperatures based on the real-time load conditions, which helps to avoid the data delay of traditional thermometer temperature measurements and makes the acquisition of the power module's surface temperature more convenient and accurate. This solution assesses the risk level of power modules that meet the first-level condensation risk but not the second-level condensation risk. This facilitates the selection of power modules with temperatures slightly above the dew point, marking power modules with low temperatures that pose a condensation risk, prioritizing the load power allocation, and enabling power modules with lower temperatures and higher condensation risk to heat up quickly. It also facilitates the selection of power modules with low second-level condensation risk, allowing the subsequent allocation of load power from the safety module to increase the load power of the low-temperature power module. This solution determines whether the output of the charging pile's power module is connected to a vehicle for charging. This allows for different heating methods to be used for the low-temperature power module, ensuring that the surface temperature of the power module is higher than the dew point temperature. This helps prevent condensation from forming on the power module surface. If the power module's output is connected to a vehicle for charging, its surface temperature can be increased by increasing the load output power. If the power module's output is not connected to a vehicle for charging, its surface temperature cannot be adjusted by adjusting the output power. However, the temperature can be adjusted by changing the power module's operating state. The temperature can be slightly increased by operating under no-load conditions, or further increased by outputting a small current under light load. This solution uses a method that sacrifices a small amount of electrical energy and charging efficiency to regulate the power module's temperature, abandoning the traditional heat transfer heating method. This not only makes temperature regulation faster and more precise but also helps prevent condensation from corroding the power module's electronic components. It is worth mentioning that the preset threshold value in this scheme can be obtained through weighted analysis. The length of the no-load time and the light-load time can be selected according to the actual local environment and climate, which will not be elaborated on here.

[0021] In S1, the humidity of the environment around each charging station is acquired through a humidity sensor, and the humidity level is used to determine whether the risk level meets the criteria for Level 1 condensation. Specifically: S101: Set the monitoring cycle, continuously acquire the humidity of the charging pile environment at monitoring cycle intervals, and set the preset humidity threshold. S102: Determine whether the humidity of the charging pile environment is greater than the preset humidity threshold. If the humidity of the charging pile environment is greater than or equal to the preset humidity threshold, it is marked as meeting the first-level condensation risk. If the humidity of the charging pile environment is less than the preset humidity threshold, it is marked as not meeting the first-level condensation risk and S101 is executed again.

[0022] In this embodiment, the humidity of each charging pile's environment is obtained through a humidity sensor to determine whether the humidity is high enough to meet the conditions for condensation formation, thereby helping to avoid meaningless frequent temperature adjustments when the humidity is low.

[0023] In S1, the surface temperature of each power module is obtained, and the specific steps are as follows: S103: Obtain the ambient temperature of each charging pile through a thermometer, obtain the current load of each power module, and determine whether the current load of the power module is 0. If the current load of the power module is 0, mark the ambient temperature as the surface temperature of the power module. If the current load of the power module is not 0, execute S104. S104: Find the efficiency of the power module under the current load through the power module datasheet, obtain the temperature rise value by the current load and efficiency, and obtain the surface temperature of the power module by summing the temperature rise value with the ambient temperature. In S104, the temperature rise value is obtained through the current load and efficiency. The formula for calculating the temperature rise value is:

[0024] Where T represents the temperature rise, F represents the efficiency, and 1 > F > 0.

[0025] In this embodiment, the surface temperature of the power module is calculated by calculating the load power, efficiency, and ambient temperature of the power module, instead of directly measuring the temperature with a thermometer in the traditional way. This method of calculating the temperature can not only avoid the problem of temperature interference between the power module and other modules, but also avoid the inaccuracy caused by measuring the temperature of a single measurement point with a thermometer. Furthermore, it can immediately estimate the current and future temperatures based on the real-time load conditions, which helps to avoid the data delay of traditional thermometer temperature measurement and makes it more convenient and accurate to obtain the surface temperature of the power module.

[0026] In S1, the determination of whether the level 2 condensation risk is met is based on the dew point temperature and the surface temperature of the power module. Specifically, the dew point temperature is obtained, the surface temperature of the power module is obtained, and it is determined whether the surface temperature of the power module is lower than the dew point temperature. If the surface temperature of the power module is lower than or equal to the dew point temperature, the determination result is marked as meeting the level 2 condensation risk. If the surface temperature of the power module is higher than the dew point temperature, the determination result is marked as not meeting the level 2 condensation risk.

[0027] In this embodiment, after the humidity is high enough to meet the first level of condensation risk, the dew point temperature is measured by a dew point meter, the temperature of the power module is calculated by the load of the power module, and finally it is determined whether the surface temperature of the module is lower than the dew point temperature, thereby determining whether there is a risk of condensation forming on the power module.

[0028] In S2, the secondary condensation risk level is obtained by comparing the dew point temperature with the surface temperature of the power module, specifically as follows: S201: Obtain the dew point temperature and the surface temperature of the power module. Calculate the temperature difference by subtracting the surface temperature of the power module from the dew point temperature. Determine if the temperature difference is less than 1°C. If the temperature difference is less than or equal to 1°C, mark the power module as a level 2 high-risk condensation module. If the temperature difference is greater than 1°C, execute S202. S202: Determine if the temperature difference is less than 3℃. If the temperature difference is less than or equal to 3℃, mark the power module as medium risk of secondary condensation. If the temperature difference is greater than 3℃, mark the power module as low risk of secondary condensation.

[0029] In this embodiment, by judging the risk level of power modules that meet the first-level condensation risk but not the second-level condensation risk, it is easier to screen out power modules with temperatures slightly higher than the dew point temperature. This facilitates marking power modules with low temperatures that pose a condensation risk, which in turn facilitates the subsequent sorting of load power calls. This allows power modules with lower temperatures and higher condensation risk to heat up as quickly as possible. It also facilitates the screening of power modules with low second-level condensation risk, which makes it easier to subsequently call load power from the safety module to increase the load power of the low-temperature power module.

[0030] In S3, the system determines whether the current state of the charging pile power module output is in vehicle reception mode. Specifically: S301: Obtain the output current of the charging pile power module, determine whether the output current of the charging pile power module is greater than 1A. If the output current of the charging pile power module is greater than 1A, mark the current state of the output terminal of the charging pile power module as vehicle receiving operation. If the output current of the charging pile power module is less than or equal to 1A, execute S302. S302: Obtain the output voltage of the charging pile power module, and determine whether the output voltage of the charging pile power module is greater than 200V. If the output voltage of the charging pile power module is greater than or equal to 200V, mark the current status of the output terminal of the charging pile power module as vehicle receiving operation. If the output voltage of the charging pile power module is less than 200V, mark the current status of the output terminal of the charging pile power module as no vehicle receiving operation.

[0031] In this embodiment, the current state of the charging pile power module output terminal is determined by the output current and voltage data to determine whether it is in vehicle receiving mode, thereby making the judgment result more accurate and facilitating the subsequent selection of the power module temperature adjustment method.

[0032] In S3, the load power of the safety module is increased to boost the load power of the cryogenic power module, specifically as follows: S303: Obtain the power module for secondary condensation risk, obtain the power module for secondary condensation medium risk, obtain the power module for secondary condensation high risk, and collect and mark the power modules for secondary condensation risk, secondary condensation medium risk, and secondary condensation high risk as low temperature power modules. S304: Obtain the temperature and dew point temperature of the low-temperature power module, calculate the temperature difference value by subtracting the temperature and dew point temperature of the low-temperature power module, arrange all temperature difference values ​​in descending order, and define this arrangement order as the load increase order; S305: Obtain the load power of all safety modules, reduce the load power of all safety modules by half, and increase the low temperature power modules in sequence according to the load increase order until the surface temperature of the low temperature power module does not meet the level 2 condensation risk, and then increase the next low temperature power module. S306: During the load power call process, continuously acquire the surface temperature of all safety modules. If the surface temperature of a safety module meets the level 2 condensation risk, stop reducing the load power of that safety module and mark that safety module as level 2 condensation risk.

[0033] In this embodiment, the power module output is connected to the vehicle for charging. This indicates that the surface temperature of the power module can be increased by increasing the load output power of the power module. The load power of the secondary low-risk power module is transferred to the low-temperature power module for load output through the secondary low-condensity power module. This facilitates increasing the surface temperature of the low-temperature power module while the charging pile is charging normally. Furthermore, the temperature of the secondary low-risk power module with reduced load is monitored to prevent the temperature from dropping too quickly. This makes it easier to balance the surface temperature of different power modules through load changes, which in turn helps to prevent condensation from corroding the electronic components of the power module.

[0034] In S3, the charging pile power module is set to operate at its lowest load based on the safe temperature difference, specifically as follows: S307: Obtain the low-temperature power module, enable the low-temperature power module to be in no-load state, set the no-load time, and after the no-load time ends, determine whether the low-temperature power module meets the level 2 condensation risk. If the low-temperature power module meets the level 2 condensation risk, mark the low-temperature power module as a light-load power module and execute S308. If the low-temperature power module does not meet the level 2 condensation risk, disable the no-load state of the low-temperature power module. S308: Obtain the power module to be light-loaded, turn off the no-load state of the power module to be light-loaded, turn on the light-load state of the power module to be light-loaded, set the light-load time, and after the light-load time ends, determine whether the power module to be light-loaded meets the level 2 condensation risk. If the power module to be light-loaded does not meet the level 2 condensation risk, turn off the light-load state of the power module to be light-loaded. If the power module to be light-loaded meets the level 2 condensation risk, turn on the alarm to remind the management personnel that the power module to be light-loaded has an abnormal risk.

[0035] In this embodiment, the power module output is not connected to a vehicle for charging, indicating that the surface temperature of the power module cannot be adjusted by adjusting the output power. However, the temperature can be adjusted by changing the operating state of the power module. The temperature of the power module can be increased slightly by operating under no-load conditions, or by outputting a weak current under light load conditions to further increase the module temperature. In this solution, the temperature of the power module is adjusted by sacrificing a small amount of electrical energy and charging efficiency, abandoning the traditional heating method of heat transfer from heat sources. This not only makes the temperature adjustment faster and more precise, but also helps to avoid condensation formation that corrodes the electronic components of the power module.

[0036] The above embodiments can be implemented, in whole or in part, by software, hardware, firmware, or any other combination thereof. When implemented in software, the above embodiments can be implemented, in whole or in part, as a computer program product. Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution.

[0037] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0038] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A method for controlling condensation in charging facilities based on module power sharing, characterized in that, Includes the following steps: S1: Obtain the humidity of the environment of each charging pile through a humidity sensor, and determine whether the level 1 condensation risk is met based on the humidity. If the level 1 condensation risk is met, obtain the dew point temperature of the environment of each charging pile through a dew point meter, obtain the surface temperature of each power module, and determine whether the level 2 condensation risk is met based on the dew point temperature and the surface temperature of the power module. If the level 2 condensation risk is met, proceed to S3; otherwise, proceed to S2. S2: Obtain the secondary condensation risk level by comparing the dew point temperature with the surface temperature of the power module. Determine whether the secondary condensation risk level meets the requirements for low risk of secondary condensation. If the secondary condensation risk level does not meet the requirements for low risk of secondary condensation, then execute S3. If the secondary condensation risk level meets the requirements for low risk of secondary condensation, then mark the power module of the charging pile as a safe module and execute S1. S3: Determine whether the current state of the charging pile power module output is vehicle receiving operation. If the current state of the charging pile power module output is vehicle receiving operation, then call the load power of the safety module to increase the load power of the low temperature power module. If the current state of the charging pile power module output is not vehicle receiving operation, then start the minimum load operation of the charging pile power module according to the safety temperature difference.

2. The condensation control method for charging facilities based on module power sharing according to claim 1, characterized in that: In S1, the humidity of the environment around each charging station is acquired through a humidity sensor, and the humidity level is used to determine whether the risk level meets the criteria for Level 1 condensation. Specifically: S101: Set the monitoring cycle, continuously acquire the humidity of the charging pile environment at monitoring cycle intervals, and set the preset humidity threshold. S102: Determine whether the humidity of the charging pile environment is greater than the preset humidity threshold. If the humidity of the charging pile environment is greater than or equal to the preset humidity threshold, it is marked as meeting the first-level condensation risk. If the humidity of the charging pile environment is less than the preset humidity threshold, it is marked as not meeting the first-level condensation risk and S101 is executed again.

3. The condensation control method for charging facilities based on module power sharing according to claim 1, characterized in that: In S1, the surface temperature of each power module is obtained, and the specific steps are as follows: S103: Obtain the ambient temperature of each charging pile through a thermometer, obtain the current load of each power module, and determine whether the current load of the power module is 0. If the current load of the power module is 0, mark the ambient temperature as the surface temperature of the power module. If the current load of the power module is not 0, execute S104. S104: Find the efficiency of the power module under the current load through the power module datasheet, obtain the temperature rise value by the current load and efficiency, and obtain the surface temperature of the power module by summing the temperature rise value with the ambient temperature.

4. The condensation control method for charging facilities based on module power sharing according to claim 3, characterized in that: In S104, the temperature rise value is obtained through the current load and efficiency. The formula for calculating the temperature rise value is: Where T represents the temperature rise, F represents the efficiency, and 1 > F > 0.

5. The charging facility condensation control method based on module power sharing according to claim 1, characterized in that: In S1, the determination of whether the level 2 condensation risk is met is based on the dew point temperature and the surface temperature of the power module. Specifically, the dew point temperature is obtained, the surface temperature of the power module is obtained, and it is determined whether the surface temperature of the power module is lower than the dew point temperature. If the surface temperature of the power module is lower than or equal to the dew point temperature, the determination result is marked as meeting the level 2 condensation risk. If the surface temperature of the power module is higher than the dew point temperature, the determination result is marked as not meeting the level 2 condensation risk.

6. The condensation control method for charging facilities based on module power sharing according to claim 1, characterized in that: In S2, the secondary condensation risk level is obtained by comparing the dew point temperature with the surface temperature of the power module, specifically as follows: S201: Obtain the dew point temperature and the surface temperature of the power module. Calculate the temperature difference by subtracting the surface temperature of the power module from the dew point temperature. Determine if the temperature difference is less than 1°C. If the temperature difference is less than or equal to 1°C, mark the power module as a level 2 high-risk condensation module. If the temperature difference is greater than 1°C, execute S202. S202: Determine if the temperature difference is less than 3℃. If the temperature difference is less than or equal to 3℃, mark the power module as medium risk of secondary condensation. If the temperature difference is greater than 3℃, mark the power module as low risk of secondary condensation.

7. The charging facility condensation control method based on module power sharing according to claim 1, characterized in that: In S3, the system determines whether the current state of the charging pile power module output is in vehicle reception mode. Specifically: S301: Obtain the output current of the charging pile power module, determine whether the output current of the charging pile power module is greater than 1A. If the output current of the charging pile power module is greater than 1A, mark the current state of the output terminal of the charging pile power module as vehicle receiving operation. If the output current of the charging pile power module is less than or equal to 1A, execute S302. S302: Obtain the output voltage of the charging pile power module, and determine whether the output voltage of the charging pile power module is greater than 200V. If the output voltage of the charging pile power module is greater than or equal to 200V, mark the current status of the output terminal of the charging pile power module as vehicle receiving operation. If the output voltage of the charging pile power module is less than 200V, mark the current status of the output terminal of the charging pile power module as no vehicle receiving operation.

8. The charging facility condensation control method based on module power sharing according to claim 1, characterized in that: In S3, the load power of the safety module is increased to boost the load power of the cryogenic power module, specifically as follows: S303: Obtain the power module for secondary condensation risk, obtain the power module for secondary condensation medium risk, obtain the power module for secondary condensation high risk, and collect and mark the power modules for secondary condensation risk, secondary condensation medium risk, and secondary condensation high risk as low temperature power modules. S304: Obtain the temperature and dew point temperature of the low-temperature power module, calculate the temperature difference value by subtracting the temperature and dew point temperature of the low-temperature power module, arrange all temperature difference values ​​in descending order, and define this arrangement order as the load increase order; S305: Obtain the load power of all safety modules, reduce the load power of all safety modules by half, and increase the low temperature power modules in sequence according to the load increase order until the surface temperature of the low temperature power module does not meet the level 2 condensation risk, and then increase the next low temperature power module. S306: During the load power call process, continuously acquire the surface temperature of all safety modules. If the surface temperature of a safety module meets the level 2 condensation risk, stop reducing the load power of that safety module and mark that safety module as level 2 condensation risk.

9. The condensation control method for charging facilities based on module power sharing according to claim 9, characterized in that: In S3, the charging pile power module is set to operate at its lowest load based on the safe temperature difference, specifically as follows: S307: Obtain the low-temperature power module, enable the low-temperature power module to be in no-load state, set the no-load time, and after the no-load time ends, determine whether the low-temperature power module meets the level 2 condensation risk. If the low-temperature power module meets the level 2 condensation risk, mark the low-temperature power module as a light-load power module and execute S308. If the low-temperature power module does not meet the level 2 condensation risk, disable the no-load state of the low-temperature power module. S308: Obtain the power module to be light-loaded, turn off the no-load state of the power module to be light-loaded, turn on the light-load state of the power module to be light-loaded, set the light-load time, and after the light-load time ends, determine whether the power module to be light-loaded meets the level 2 condensation risk. If the power module to be light-loaded does not meet the level 2 condensation risk, turn off the light-load state of the power module to be light-loaded. If the power module to be light-loaded meets the level 2 condensation risk, turn on the alarm to remind the management personnel that the power module to be light-loaded has an abnormal risk.

Images