An outdoor shared power supply pile intelligent control management system

Abstract

The application discloses an outdoor shared power pile intelligent control management system and relates to the field of remote monitoring and management of power piles. The system comprises a shared power battery composed of a main energy storage battery and a backup battery group. The power supply priority of the backup battery is adjusted based on the power grid power consumption period grading, corresponding electricity price and power pile usage state switching. The residual power of a charging vehicle and the expected stay time of a user are obtained through a vehicle communication interface. A comprehensive urgency index is calculated based on the above information. A power pile power supply scheduling scheme containing a time-of-use billing strategy is generated in combination with the power supply state. The safety abnormality is judged according to the power pile power supply scheduling scheme and the monitored line temperature and leakage current. Remote enabling judgment logic is set for the power pile that is disabled due to safety abnormality, thereby solving the problems of low resource utilization, high operating cost, inflexible scheduling and lagging safety monitoring in the prior art.

Description

Technical Field

[0001] This invention belongs to the field of power charging pile technology and relates to an intelligent control and management system for outdoor shared power charging piles. Background Technology

[0002] With the widespread adoption of outdoor electrification equipment, the demand for temporary outdoor power has surged, leading to the increasingly widespread application of shared charging stations. However, existing systems are constrained by factors such as grid characteristics, energy dispatch, battery management, and safety monitoring, resulting in problems such as high operating costs, low energy efficiency, unstable power supply, and inaccurate safety control. These shortcomings make it difficult to adapt to complex outdoor scenarios and large-scale operational needs. Specifically, the existing technology uses independent power supplies and a fixed deployment method of one charging station per power source. However, the power supply capacity of a single charging station is limited by the remaining power of its corresponding power source. This makes it impossible to allocate idle power resources across charging stations or flexibly adapt to users' actual charging needs. If a charging station is low on power after the previous user has finished charging, subsequent users, even if they queue until the station becomes available, will still be unable to charge due to insufficient power and will have to queue again. This not only significantly extends the user's charging wait time and results in a poor user experience but also wastes the resources of the charging station and leads to high operating costs when electricity prices fluctuate.

[0003] Secondly, existing technologies only perform passive shutdown or simple reset operations for monitored over-limit results. They only perform passive shutdown for abnormal over-limits and simple reset operations when the fault is temporarily cleared. They lack differentiated management and control for charging piles during or when they are idle, which ultimately results in low resource utilization. Summary of the Invention

[0004] In view of this, in order to solve the problems mentioned in the background art, the present invention provides an intelligent control and management system for outdoor shared power charging piles.

[0005] The objective of this invention can be achieved through the following technical solution: an intelligent control and management system for outdoor shared power stations, comprising: a power status monitoring module, used to monitor the remaining power of the main energy storage battery and collect data on the power grid's time-of-use tiers and corresponding electricity prices.

[0006] The power switching decision module compares the remaining power of the primary energy storage battery with a preset threshold. It also determines whether to switch to the backup battery and adjust the priority of the power supply battery based on the grid's electricity consumption time tiers, corresponding electricity prices, and the usage status of the power piles, and then outputs the power switching status.

[0007] The power supply scheduling module for power piles is used to generate a power supply scheduling plan that includes time-of-use billing strategies based on the power switching status and the electricity demand of users at each power pile.

[0008] The safety anomaly detection module is used to monitor the temperature and leakage current of the power supply pile's own lines and to determine safety anomalies based on the power supply scheduling plan of the power supply pile and the monitored line temperature and leakage current.

[0009] The remote start / stop control module is used to remotely start / stop the power supply piles based on abnormal safety conditions.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The present invention constructs a shared power pool consisting of a main energy storage battery and a backup battery pack, and switches the backup battery and adjusts the priority of the power supply battery based on the grid electricity consumption period and the corresponding electricity price and the power pile usage status. This solves the problem of resource island caused by one power pile and one power source. It not only improves the overall utilization rate of power resources and avoids resource waste and repeated queuing caused by insufficient power of a single pile, but also actively utilizes the low electricity price for charging, the peak discharge, or the use of backup power, directly reducing the system operating cost.

[0011] (2) This invention obtains the remaining power of the charging equipment and the user's expected stay time through the communication interface of the charging equipment, calculates the comprehensive urgency index accordingly, and generates a power supply scheduling scheme for the charging piles that includes time-sharing billing strategy in combination with the power status. It realizes fair and efficient scheduling based on the user's actual needs, and dynamically allocates shared power across multiple charging piles on demand, thereby improving the user experience and the turnover rate of the charging pile group.

[0012] (3) Based on the power supply scheduling scheme of the power pile and the monitored line temperature and leakage current, the present invention judges the safety abnormality. For the power pile that is shut down due to safety abnormality, a remote activation judgment logic is set. By identifying the abnormal trend of electrical parameters in the early stage, an early warning is given before the safety hazard occurs. At the same time, it ensures that the reactivation of each power pile is based on the reliability of system-level safety and service capabilities, fundamentally eliminating the situation of operating with defects and being activated but not used. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram showing the connections of the various modules in the system of the present invention.

[0015] Figure 2 This is a flowchart of the energy storage battery power supply status control of the present invention.

[0016] Figure 3This is a flowchart for identifying safety anomalies in power supply piles according to the present invention. Detailed Implementation

[0017] 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.

[0018] Please see Figure 1 As shown, this invention provides an intelligent control and management system for outdoor shared power stations, including a power status monitoring module, a power switching decision module, a power station power supply scheduling module, a safety anomaly judgment module, and a remote start / stop control module. All modules are connected in the order described above.

[0019] The power status monitoring module is used to monitor the remaining power of the main energy storage battery and collect data on the power grid's time of day and corresponding electricity price.

[0020] During the operation of self-service shared power stations, if they rely entirely on direct power supply from the power grid, they need to continuously obtain power from the power grid to meet the user's charging needs. This cannot avoid the inherent characteristics of significant peak-valley electricity price differences and high peak load pressure, resulting in a dual contradiction between system operation and grid coordination. Therefore, using the main energy storage battery as one of the core power sources, and using low-priced grid electricity to supplement battery capacity, can achieve power storage during off-peak periods and discharge during peak periods.

[0021] Based on this, the steps for obtaining the remaining power of the main energy storage battery are as follows: First, the voltage and current sensors in the main energy storage battery circuit are used to collect the real-time operating voltage and real-time output current of the main energy storage battery; then, based on the real-time operating voltage and real-time output current, combined with the battery's rated capacity parameters, the remaining power of the main energy storage battery is calculated by integrating the output current over the operating time; thus, the real-time power supply capability of the battery is accurately grasped, providing reliable data support for subsequent power switching decisions and power supply scheduling of charging piles, ensuring the stable operation of the self-service shared charging pile system and the efficient use of energy.

[0022] In addition, to demonstrate the advanced nature and robustness of the technology, the calculation of the remaining power can be corrected by combining data from the battery temperature sensor and estimated using Kalman filtering.

[0023] The steps for obtaining the above-mentioned power grid time-of-use tiers and corresponding electricity prices are as follows: The communication unit connects to the power grid data center, actively requests the power grid data center's published time-of-use tier rules and the benchmark electricity price corresponding to each time-of-use period, and stores them in the local database.

[0024] The power switching decision module compares the remaining power of the primary energy storage battery with a preset threshold. It also determines whether to switch to the backup battery and adjust the priority of the power supply battery based on the grid's electricity consumption time tiers, corresponding electricity prices, and the usage status of the power piles, and then outputs the power switching status.

[0025] refer to Figure 2 As shown, the specific steps to determine whether to switch to the backup battery are as follows: If the remaining power of the main energy storage battery is higher than the low power threshold, it is determined that the main energy storage battery has sufficient power supply capacity and the current state of being powered by the main energy storage battery is maintained.

[0026] Conversely, it obtains the current power grid time period tier and corresponding benchmark electricity price. If the current time period is during the peak electricity price period and there are charging piles that are charging or waiting to be charged, it controls the power switching circuit to disconnect the main energy storage battery and connect the backup battery pack for power supply.

[0027] Since all energy storage batteries have a discharge cutoff voltage, if the charge is lower than the remaining charge corresponding to the discharge cutoff voltage, it will cause irreversible damage to the internal electrode structure of the battery, such as lithium plating in lithium batteries and sulfation in lead-acid batteries, which will directly shorten the cycle life and even cause safety hazards such as bulging and overheating.

[0028] The preset logic for the low power threshold can be the sum of the preset safety margins of the remaining power corresponding to the discharge cutoff voltage. When the remaining power is higher than the threshold, it indicates that the battery is still in the safe discharge range, there is no risk of over-discharge, and it can continue to supply power stably. The preset safety margin of the remaining power is used to ensure that the battery stops discharging before reaching the cutoff voltage to prevent over-discharge. Its specific value can be set according to the battery type, for example, it can be 3%-5% of the total capacity.

[0029] Additionally, the backup battery pack is for emergency replenishment. If the primary energy storage battery still has sufficient charge but is switched to backup prematurely, it will increase the number of charge-discharge cycles of the backup battery pack, accelerating its wear and tear. Therefore, if the remaining charge of the primary energy storage battery is higher than the low charge threshold, maintaining power supply from the primary energy storage battery essentially reduces the frequency of power switching, avoids the impact of transient fluctuations on the charging pile, and extends the lifespan of the backup battery.

[0030] If the current period is not during peak electricity price periods, or if all charging stations are idle even during peak electricity price periods, the current state of being powered by the main energy storage battery will continue.

[0031] It should be added that the prerequisite for this judgment is that the remaining power of the main energy storage battery is lower than the low power threshold, but the low power threshold is not the same as the battery over-discharge limit.

[0032] On the one hand, the core characteristics of off-peak hours are low electricity prices and low grid load. The main energy storage battery's power is mostly obtained from charging at low prices during off-peak hours, while the backup battery pack is obtained for emergency replenishment during peak hours. At this time, maintaining the main energy storage battery's power supply can first consume the remaining low-cost power of the main energy storage battery, so as to achieve no increase in cost and no waste of resources.

[0033] On the other hand, the core characteristics of peak hours are high electricity prices and high grid load, but no charging demand means that the system does not need to output power. That is, there is no load on the charging pile side and the main energy storage battery is in standby mode. At this time, maintaining the power supply of the main energy storage battery is to keep the main circuit connected and the backup circuit closed. The remaining power of the main energy storage battery will not decrease, so there will be no risk of over-discharge.

[0034] Because the self-service shared power station system lacks a mechanism for real-time collection and synchronous updating of the remaining power of the main energy storage battery and the backup battery pack during operation, it is impossible to dynamically grasp the current power supply capacity, remaining range and charging status of the two batteries, resulting in lag and uncertainty in battery status data.

[0035] Therefore, the specific steps for adjusting the priority of the power supply battery are as follows: First, monitor the remaining power of the main energy storage battery and the backup battery pack in real time; then, when the remaining power of the main energy storage battery is lower than the low power threshold, trigger the power supply battery charging request and suspend it; when the power grid enters the off-peak electricity price period, start charging the power supply battery.

[0036] It should be noted that during peak hours, the grid voltage may rise or fall suddenly due to fluctuations in electricity load. Charging the battery at this time can easily lead to unstable charging current and exacerbate the internal polarization reaction of the battery. During off-peak hours, the grid voltage is more stable, and the charging current can be precisely controlled within the battery's rated charging current range, while maximizing the battery's lifespan.

[0037] In addition, according to the domestic power grid pricing rules, the electricity price during off-peak hours is significantly lower than that during peak and flat periods. If charging is done during non-off-peak hours, long-term operation will directly reduce the charging revenue of shared charging piles.

[0038] During the charging process of the power supply battery, if the remaining power of the main energy storage battery is lower than that of the backup battery pack, the charging priority of the main energy storage battery is set to be higher than that of the backup battery pack, and the power source of the system is switched to be given priority by the backup battery pack during this charging cycle.

[0039] Conversely, the backup battery pack is set to have a higher charging priority than the primary energy storage battery, and the primary energy storage battery is given priority in power supply during this charging cycle.

[0040] It's important to note that if the remaining capacity of the primary energy storage battery is lower than that of the backup battery pack, it means that during peak charging demand periods, the primary battery will be unable to fulfill its primary power supply role. If the primary battery isn't charged first, even if the backup battery is fully charged, the system will still need to rely on the backup battery pack for power. Furthermore, a prolonged period of low capacity in the primary energy storage battery will negate its cost-optimization function. Therefore, prioritizing the charging of the primary energy storage battery is to quickly restore its capacity to a safe range and prevent the system from relying on the backup battery pack for extended periods.

[0041] The fact that the remaining capacity of the backup battery pack is lower than that of the primary energy storage battery indicates that if there is a sudden drop in the primary battery's power supply, the backup battery pack will be unable to fill the gap. In this case, the system will be forced to rely on the expensive grid power supply, which will increase operating costs and may also lead to power rationing due to high grid load. Prioritizing charging the backup battery pack is to quickly restore its capacity to an emergency safety level, ensuring that the backup battery pack is always ready to be used, avoiding the loss of dual-battery redundancy, and improving power supply reliability.

[0042] It is important to note that the power switching decision is based on real-time charging demand, while the charging priority adjustment is only performed during the charging process, and the two do not conflict with each other.

[0043] The power supply scheduling module for the power supply piles is used to generate a power supply scheduling scheme that includes a time-of-use billing strategy based on the power switching status and the electricity demand of users at each power supply pile.

[0044] Considering that the power supply scheduling scheme of the charging piles can adapt to the different power supply capabilities of the main and backup batteries, prioritize meeting the differentiated and urgent charging needs of users, and balance the operating costs and the reasonableness of user payments through time-sharing billing strategies, the goal of operating shared charging piles is to achieve stable power supply, excellent user experience, and controllable costs.

[0045] Based on this, the specific steps of the charging pile scheduling scheme including time-sharing billing strategy are as follows: obtain the remaining power of the charging equipment and the expected stay time set by the user through the communication interface of the charging equipment, and perform normalization processing respectively. Based on this, perform weighted combination to generate a comprehensive urgency index.

[0046] The formula for normalizing the remaining power of the charging equipment is as follows: .

[0047] Where S represents the current remaining power of the electrical equipment. S itself is a percentage, so the normalized S value is... However, since urgency should be negatively correlated with S, we can use... .

[0048] The normalized calculation formula for the user-defined expected stay time is as follows: .

[0049] Where T represents the user's expected dwell time. This indicates the system's preset minimum expected dwell time. This indicates the system's preset maximum expected dwell time. The system's preset minimum expected dwell time and maximum expected dwell time are based on historical data statistics. In charging scheduling, a short dwell time means the user urgently needs to charge before leaving, thus indicating high urgency. Therefore, the time urgency should be negatively correlated with the user-set expected dwell time.

[0050] The formula for calculating the comprehensive urgency index is as follows: .

[0051] in, The weighting coefficient representing the urgency of the battery charge satisfies... ; The weighting coefficients representing the urgency of time satisfy the following conditions: and The weighting coefficient can be adjusted according to the actual operational strategy. For example, if more attention is paid to low battery levels, then the weighting coefficient can be set accordingly. .

[0052] In addition, the weighting coefficients for battery urgency and time urgency can be initially set based on the system operator's industry experience; alternatively, they can be obtained through a limited number of trial data: first, collect historical data on users' remaining battery power, expected dwell time, and corresponding urgent charging scenarios; calculate user satisfaction with charging scheduling under different combinations of initial remaining battery power and preset dwell time, such as the correlation coefficient of charging success rate for users with urgent needs; then, using the weighting coefficients for battery urgency and time urgency as independent variables and user satisfaction as the dependent variable, construct a multiple linear regression model: Where Y represents the dependent variable and ε represents the error term. The model is fitted using the least squares method, and the output is the one that minimizes the regression residuals. and .

[0053] The above formula is further explained as follows: This indicates the urgency of insufficient battery power in electrical devices, directly reflecting the intensity of the charging demand. The lower the battery level, the higher the urgency. This ensures that devices with nearly depleted battery power are prioritized, preventing users from being hindered by the inability to use their devices. In scheduling decisions, this component guides the system to prioritize the allocation of charging resources to devices with low battery levels, improving service reliability.

[0054] This indicates the urgency caused by short user dwell time, reflecting the user's time constraints. The shorter the dwell time, the more urgent it is for the user to complete charging before leaving. This demonstrates respect for the user's time sensitivity. In scheduling decisions, this component ensures that devices with short dwell times are prioritized for charging, reducing user waiting time and improving the turnover efficiency of charging stations and the user experience.

[0055] Next, all charging requests are sorted in descending order based on the overall urgency index to form a charging scheduling sequence.

[0056] If the power supply is switched to the main energy storage battery, its current maximum safe discharge power is used as the total available power; if the power supply is switched to the backup battery pack, its rated output power is used as the total available power.

[0057] It should be added that selecting the maximum safe discharge power for the main battery is to avoid irreversible damage caused by over-discharge. If the main battery has already experienced increased internal resistance and capacity decay due to cycle use, discharging it at the rated power will cause the battery to generate a large amount of heat under high current, triggering the risk of thermal runaway. At the same time, over-discharge will cause the cell voltage to fall below the cutoff threshold, leading to sulfation or lithium plating on the plates, directly shortening the cycle life.

[0058] Backup batteries are selected based on their rated output power because their low-cycle, high-health state can support stable output at the rated power. Backup batteries are kept in standby or shallow-charge / discharge states for extended periods, maintaining good cell activity. When discharged at the rated power, their voltage and current curves are more stable, preventing excessive power from exacerbating internal chemical side reactions and thus ensuring battery life and safety.

[0059] Based on the charging scheduling sequence and the total available power supply, the system allocates the nominal charging power required by the charging piles to each charging request in sequence. If the total available power supply is insufficient during the allocation process, a queuing instruction is generated for subsequent charging requests according to the order of the charging scheduling sequence. This fundamentally avoids safety accidents such as line overheating, equipment tripping, or even damage that may be caused by power overload.

[0060] The specific implementation steps of the time-of-use billing strategy are as follows: if the power switching state is powered by the backup battery pack, then the preset backup battery power supply billing standard is adopted.

[0061] If the power supply is switched to the main energy storage battery, the benchmark electricity price corresponding to the current time period will be used as the billing standard.

[0062] Since the main energy storage battery's capacity is primarily stored during off-peak hours at low prices, its cost is already locked in. Billing based on the current grid benchmark price covers charging costs, ensures operating profit, aligns with users' habit of paying based on real-time grid prices, and avoids price disputes.

[0063] The backup battery pack is also charged during off-peak hours, but its usage frequency is far lower than that of the main battery. Billing it based on the grid's benchmark electricity price would be too high, leading to customer resistance; billing it based on charging costs would squeeze operating profits. Therefore, a pre-set billing standard that balances cost and user acceptance is needed to ensure that prices do not increase in emergencies.

[0064] The preset backup battery power supply billing standard is based on the pricing logic of the sum of off-peak charging costs and reasonable operating profit. The specific implementation process is as follows: First, obtain the off-peak electricity prices for the past 12 months from the power grid data center and calculate the monthly average as the benchmark for off-peak charging costs; then analyze the profit margins of other shared charging service providers in the same area and determine the profit margin coefficient based on its own operating costs; next, calculate the backup billing standard according to the formula, enter it into the billing standard table in the system's local database, and mark the effective date; finally, repeat the above steps every quarter, and update the backup billing standard if the off-peak electricity price or operating cost changes by more than 5%.

[0065] The determined billing standard is bound to each charging request in the charging scheduling sequence; before charging is executed, a charging confirmation request containing the billing standard is sent to the user terminal. After obtaining user confirmation, the charging process is started, and billing is performed according to the confirmed billing standard.

[0066] The safety anomaly judgment module is used to monitor the temperature and leakage current of the line on the power pile side, and judge the safety anomaly situation based on the power supply scheduling plan of the power pile and the monitored line temperature and leakage current.

[0067] In the operation of charging piles for new energy vehicles, the high power, high frequency, and long-term full-load working characteristics make line heating and insulation damage and leakage two core safety hazards.

[0068] As can be seen from the above, the temperature monitoring process of the circuit on the power supply pile side is as follows: temperature sensors are installed at the input end, output end and internal heat dissipation parts of the power supply circuit of the power supply pile.

[0069] It should be noted that the input terminal needs to be fixedly connected to the external power supply line through components such as terminals and plugs. Over long-term use, contact resistance may increase due to vibration, oxidation, etc. According to Joule's law, the input current is usually large during charging, and increased contact resistance will lead to a sharp increase in local heat generation. During charging, slight movement of the device may cause the charging gun to loosen its contact with the interface, or the metal contacts inside the interface may wear and oxidize due to frequent plugging and unplugging, which will also increase contact resistance and generate heat. Internal heat dissipation areas are where heat is concentrated. Charging piles typically rely on cooling fans, heat sinks, liquid cooling pipes, and other systems to dissipate the heat generated by the components. If the cooling fan malfunctions or stops, the heat sink is clogged with dust, or the liquid cooling pipes leak, the heat from the components cannot be dissipated. Therefore, temperature sensors are installed at the input and output terminals of the charging pile's power supply circuit, as well as in the internal heat dissipation areas.

[0070] The maximum value of the temperature sensor readings for each power supply pile circuit is collected as the temperature data for each phase of the power supply pile circuit.

[0071] Since the core objective of temperature monitoring of the phase lines of power outlets is to detect potential localized high temperatures that could cause faults in advance, the maximum value not only directly reflects the weakest point on the line with the highest risk, but also avoids the misleading effect of data averaging, ensuring that the protection system intervenes accurately and promptly in case of hidden dangers. Therefore, the maximum value of the temperature sensor reading is used as the temperature data for each phase line of the power outlet.

[0072] The leakage current monitoring process is as follows: First, at the AC input end of the power supply circuit of the power pile, a current transformer surrounding all phase lines and neutral lines is used as a current sampling unit to collect real-time current data of each conductor; then, based on the collected real-time current data, the current vector sum of each phase line and neutral line is calculated, and the absolute value of the calculated current vector sum is used as the leakage current data of the power pile itself.

[0073] refer to Figure 3 As shown, the specific content of judging abnormal safety conditions is as follows: obtain the nominal charging power, power supply source type and real-time charging status of each power pile, and simultaneously collect continuous monitoring data of line temperature and leakage current with timestamps.

[0074] A temperature rise trend curve is generated based on continuous line temperature monitoring data, and the instantaneous slope of the temperature rise trend curve is extracted.

[0075] Furthermore, the instantaneous slope is obtained by numerical differentiation, such as by calculating the ratio of the temperature difference between two adjacent monitoring times to the corresponding time difference to approximate the instantaneous rate of change at a certain moment, i.e., the instantaneous slope.

[0076] Based on the nominal charging power and power supply type of the charging pile, determine the normal temperature rise trend range of the line under the corresponding operating conditions; if the instantaneous slope of the temperature rise trend curve deviates from the normal temperature rise trend range of the line within three consecutive monitoring cycles, then mark the charging pile as having an abnormal temperature.

[0077] It should be noted that under normal operating conditions, the temperature rise of the power supply line is regulated by stable factors such as current load and heat dissipation efficiency, and its instantaneous slope will remain within the normal range that matches the balance between heat generation and heat dissipation. If the instantaneous slope of the temperature rise trend curve deviates from the normal temperature rise trend range of the line within three consecutive monitoring cycles, it indicates that the line's heat generation has increased abnormally or its heat dissipation has weakened abnormally, resulting in a disruption of the thermal balance. Moreover, this imbalance is continuous, indicating that the line has potential fault hazards and should be marked as a temperature anomaly to avoid the risk from escalating.

[0078] For electrical outlets marked as having abnormal temperatures, if the leakage current shows a synchronous increasing trend with the temperature rise, or if the leakage current changes from a stable state to an increasing state near the time when the temperature begins to rise abnormally, then the electrical outlet is marked as having leakage current-related abnormalities.

[0079] Abnormal temperature and abnormal leakage current are recorded as safety abnormalities.

[0080] The insulation performance of power supply lines is directly related to temperature. An abnormal rise in temperature will accelerate the aging, breakdown, or reduction of resistance of insulation materials, which will lead to an increase in leakage current. If the leakage current increases synchronously with the temperature rise, or changes from stable to rising near the starting point of the temperature anomaly, it indicates that there is a causal relationship between the two caused by insulation deterioration. That is, the temperature anomaly and the leakage problem are caused by the same potential fault, such as insulation layer damage or overheating of joints that damages insulation. Therefore, it is marked as leakage current-related anomaly.

[0081] The remote start / stop control module is used to remotely start / stop the power supply piles according to abnormal safety conditions.

[0082] Specifically, a remote shutdown command is sent to the charging pile when any of the following conditions exist: the charging pile is in a charging state and continues to meet the abnormal temperature and leakage current correlation abnormality within a preset observation period.

[0083] Even when the power supply pile is idle, the line temperature still shows an upward trend.

[0084] When the line is charging, abnormal temperature and leakage current indicate that the insulation deterioration and other faults have been continuously affecting safety. If these conditions are met continuously during the observation period, it proves that the fault has not been alleviated and may have worsened. If the line is not shut down, it may cause a short circuit or electric shock. When the line is idle, there is no charging current and the temperature should be stable or decrease. If the temperature continues to rise, it indicates that there are non-load heat generation problems such as internal short circuits or component failures. The fault risk is more direct. Therefore, in both cases, the line should be shut down remotely to prevent accidents.

[0085] A remote activation command is sent to a deactivated power station when all of the following conditions are met: the system self-test confirms that the power output is stable and the critical electrical connections are in normal condition.

[0086] If the power supply itself experiences voltage fluctuations, abnormal frequency, or harmonic interference, it can directly damage the delicate power electronic components inside the charging pile, impacting the battery management system of the connected electrical equipment and posing a safety risk to the equipment's battery. Furthermore, loose connections or oxidation in critical electrical connections can lead to excessive contact resistance at the connection points, causing localized overheating when large currents are passed through, which is a major fire hazard.

[0087] Confirm that there are no safety abnormalities in the current power station; if this step is ignored and it is used blindly, the original safety abnormalities are very likely to recur instantly after power is turned on, leading to immediate shutdown or an accident.

[0088] The allocable charging power can meet users' charging requests; since the activation of each charging pile consumes the total available power of the system, if a new pile is activated when the total power is close to the limit, it may trigger the overload protection of the entire system, causing a large-scale trip and making all charging piles stop working.

[0089] The parameters involved in the above formula are all dimensionless and calculated numerically. The formula is a formula obtained from the most recent real situation by collecting a large amount of data and simulating it with software. The preset parameters in the formula are set by those skilled in the art according to the actual situation.

[0090] The above embodiments can be implemented, in whole or in part, by software, hardware, firmware, or any other combination thereof. When implemented using software, the above embodiments can be implemented, in whole or in part, in the form of a computer program product.

[0091] Those skilled in the art will recognize that the modules 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. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0092] In addition, the functional modules in the various embodiments of this application can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module.

[0093] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations 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. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0094] Finally, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An intelligent control and management system for outdoor shared charging stations, characterized in that: include: The power status monitoring module is used to monitor the remaining power of the main energy storage battery and collect the grid power consumption time tiers and corresponding electricity prices; The power switching decision module compares the remaining power of the main energy storage battery with a preset threshold. It also determines whether to switch to the backup battery and adjust the priority of the power supply battery based on the grid's electricity consumption time tiers, corresponding electricity prices, and the usage status of the power piles, and then outputs the power switching status. The power supply scheduling module for power piles is used to generate a power supply scheduling plan that includes time-of-use billing strategies based on the power switching status and the electricity demand of users at each power pile. The safety anomaly judgment module is used to monitor the temperature and leakage current of the line on the power supply pile side, and judge the safety anomaly situation based on the power supply scheduling plan of the power supply pile and the monitored line temperature and leakage current. The remote start / stop control module is used to remotely start / stop the power supply piles based on abnormal safety conditions. The specific steps for generating a power supply scheduling scheme for power piles, which includes a time-of-use billing strategy, based on the power switching status and the electricity demand of users at each power pile are as follows: The remaining battery power of the charging device and the user's expected stay time are obtained through the device communication interface, and then normalized separately. Based on this, a weighted combination is performed to generate a comprehensive urgency index. All charging requests are sorted in descending order based on a comprehensive urgency index to form a charging scheduling sequence. If the power supply is switched to power the main energy storage battery, then its current maximum safe discharge power is taken as the total available power supply. If the power switching state is to be powered by the backup battery pack, then its rated output power is taken as the total available power. Based on the charging scheduling sequence and the total available power supply, the nominal charging power required by the charging piles is allocated to the charging requests in sequence. If the total available power supply is insufficient during the allocation process, a queuing instruction is generated for subsequent charging requests according to the order of the charging scheduling sequence.

2. The intelligent control and management system for outdoor shared power stations according to claim 1, characterized in that: The specific contents of the power status monitoring module are as follows: The real-time operating voltage and real-time output current of the main energy storage battery are collected using voltage and current sensors in the main energy storage battery circuit. Based on the real-time operating voltage and real-time output current, combined with the battery's rated capacity parameters, the remaining power of the main energy storage battery is calculated by integrating the output current over the operating time. By connecting to the power grid data center through the communication unit, it actively requests the electricity consumption time-based tiering rules and the corresponding benchmark electricity price for each electricity consumption time period published by the power grid data center, and stores them in the local database.

3. The intelligent control and management system for outdoor shared power stations according to claim 1, characterized in that: The specific steps for determining whether to switch to the backup battery are as follows: If the remaining power of the primary energy storage battery is higher than the low power threshold, it is determined that the primary energy storage battery has sufficient power supply capacity, and the current state of being powered by the primary energy storage battery is maintained. Conversely, it obtains the current power grid time period tier and corresponding benchmark electricity price. If the current time period is during the peak electricity price period and there are charging piles that are charging or waiting to be charged, it controls the power switching circuit to disconnect the main energy storage battery and connect the backup battery pack for power supply. If the current period is not during peak electricity price periods, or if all charging stations are idle even during peak electricity price periods, the current state of being powered by the main energy storage battery will continue.

4. The intelligent control and management system for outdoor shared power stations according to claim 3, characterized in that: The specific steps for adjusting the power supply battery priority are as follows: Real-time monitoring of the remaining power of the main energy storage battery and the backup battery pack; When the remaining power of the main energy storage battery is lower than the low power threshold, a charging request for the power supply battery is triggered and suspended. When the power grid enters a period of low electricity price, the charging of the power supply battery is started. During the charging process of the power supply battery, if the remaining power of the main energy storage battery is lower than the remaining power of the backup battery pack, the charging priority of the main energy storage battery is set to be higher than that of the backup battery pack, and the power supply source of the system is switched to be given priority by the backup battery pack during this charging cycle. Conversely, the backup battery pack is set to have a higher charging priority than the primary energy storage battery, and the primary energy storage battery is given priority in power supply during this charging cycle.

5. The intelligent control and management system for outdoor shared power stations according to claim 1, characterized in that: The process of generating a power supply scheduling scheme for power outlets that includes a time-of-use billing strategy, based on the power switching status and the electricity demand of each power outlet, further includes the following steps: If the power switching status is to be powered by the backup battery pack, then the preset backup battery power supply billing standard will be used. If the power supply is switched to the main energy storage battery, the benchmark electricity price corresponding to the current time period will be used directly as the billing standard. The established billing standard is bound to each charging request in the charging scheduling sequence; Before charging, a charging confirmation request containing the billing standard is sent to the user terminal. After obtaining user confirmation, the charging process is started, and billing is performed according to the confirmed billing standard.

6. The intelligent control and management system for outdoor shared power stations according to claim 1, characterized in that: The process for monitoring the temperature of the power supply pile's own circuit is as follows: Temperature sensors are installed at the input and output ends of the power supply circuit of the power pile, as well as in the internal heat dissipation parts. The maximum value of the temperature sensor readings for each power supply pile circuit is collected as the temperature data for each phase of the power supply pile circuit.

7. The intelligent control and management system for outdoor shared power stations according to claim 1, characterized in that: The leakage current monitoring process is as follows: At the AC input end of the power supply circuit of the power pile, a current transformer that surrounds all phase lines and neutral lines is used as a current sampling unit to collect real-time current data of each conductor. Based on the collected real-time current data, the current vector sum of each phase line and the neutral line is calculated; The absolute value of the calculated current vector sum is used as the leakage current data of the charging pile itself.

8. The intelligent control and management system for outdoor shared power stations according to claim 1, characterized in that: The specific details of determining abnormal security situations are as follows: Obtain the nominal charging power, power source type and real-time charging status of each charging pile, and simultaneously collect continuous monitoring data of line temperature and leakage current with timestamps; A temperature rise trend curve is generated based on continuous line temperature monitoring data, and the instantaneous slope of the temperature rise trend curve is extracted. Based on the nominal charging power of the charging pile and the type of power supply, determine the normal upward trend range of the line temperature under the corresponding operating conditions. If the instantaneous slope of the temperature rise trend curve deviates from the normal temperature rise trend range of the line within three consecutive monitoring cycles, the power station will be marked as having an abnormal temperature. For electrical outlets marked as having abnormal temperatures, if the leakage current shows a synchronous increasing trend with the temperature rise, or if the leakage current changes from a stable state to an increasing state near the time when the temperature begins to rise abnormally, then the electrical outlet is marked as having leakage current-related abnormalities. Abnormal temperature and abnormal leakage current are recorded as safety abnormalities.

9. The intelligent control and management system for outdoor shared power stations according to claim 1, characterized in that: The specific contents of the remote start / stop control module are as follows: A remote deactivation command will be sent to the charging station in any of the following situations: The charging pile is in a charging state and continuously meets the abnormal temperature and leakage current correlation abnormality within the preset observation period. Even when the power outlet is idle, the line temperature still shows an upward trend; A remote activation command will be sent to a deactivated power outlet when all of the following conditions are met simultaneously: The system self-test confirmed that the power output was stable and the key electrical connections were normal. Confirm that there are no safety abnormalities at the current power station; The available charging power can meet the user's charging requests.

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