Charging power distribution method and charging system

Abstract

The invention discloses a charging power distribution method and system, is applied to the technical field of electric vehicles, and is used for solving the problems of poor applicability and safety of a charging power distribution method in a complex environment in the prior art. The method specifically comprises the steps of obtaining a charging demand of a charging vehicle connected with a current electric gun; according to the charging demand, the corresponding charging power module is controlled to be connected with the current charging gun, and the corresponding charging power module is controlled to charge the charging vehicle; in the charging process of the charging vehicle, the predicted environment data of the position where the charging vehicle is located and the current temperature and humidity data of the charging equipment are obtained, and a current charging power adjustment value is output through the rate judgment model; and adjusting the output power output to the charging vehicle according to the current charging power adjustment value. According to the mode of dynamically optimizing the charging power, the applicability of the charging power distribution method in a complex environment is greatly enhanced, and flexible adjustment can be carried out according to the actual environment condition and the equipment state.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric vehicles, in particular to a charging power distribution method and a charging system. BACKGROUND

[0002] With the continuous improvement of economic and social development level, and the rapid development of electric vehicles and renewable energy, the number of new energy vehicles is gradually increasing, and users' attention to battery safety, range and power performance continues to rise. As a bridge connecting the battery management system, the direct current charging system and the vehicle energy management, the charging power distribution method directly affects the charging efficiency, the battery life and the safety of the charging system.

[0003] At present, the charging power distribution mainly focuses on the parameters of the vehicle battery itself and the output capacity of the charging equipment. However, when multiple devices are simultaneously charging at high power, if the environment is poorly ventilated or the equipment has poor heat dissipation conditions, it may cause a sharp rise in local temperature, thereby affecting the charging efficiency, and even causing safety hazards. Therefore, the applicability and safety of the existing charging power distribution method in complex environments still have certain limitations. SUMMARY

[0004] The purpose of the embodiments of the present application is to provide a charging power distribution method and a charging system to solve the problem of poor applicability and safety of the charging power distribution method in the prior art in complex environments.

[0005] In a first aspect, the present application provides a charging power distribution method, comprising: obtaining the charging demand of a charging vehicle connected to a current charging gun in a charging equipment; controlling the connection of the corresponding charging power module and the current charging gun according to the charging demand, and controlling the corresponding charging power module to charge the charging vehicle; In the process of charging the charging vehicle, obtaining the predicted environmental data of the location of the charging vehicle and the current temperature and humidity data of the charging equipment; inputting the predicted environmental data and the current temperature and humidity data into a power determination model to obtain the current charging power adjustment value output by the power determination model; and adjusting the output power of the charging equipment output to the charging vehicle through the current charging gun according to the current charging power adjustment value.

[0006] Optionally, controlling the connection of the corresponding charging power module and the current charging gun according to the charging demand comprises: determining whether the main charging power module corresponding to the current charging gun is in a usable state; If yes, the main charging power module corresponding to the current charging gun is connected to charge the vehicle; when the maximum output power of the main charging power module corresponding to the current charging gun cannot meet the charging demand, the main charging power module and / or the auxiliary charging power module in the available state are sequentially connected to charge the vehicle until the output power of the current charging gun meets the charging demand.

[0007] Optionally, the predicted environment data and the current temperature and humidity data are input into the power determination model to obtain a current charging power adjustment value output by the power determination model, including: determining a predicted temperature and a predicted temperature rise in the first time according to the predicted environment data; based on a preset mapping relationship between the predicted temperature warning condition and the power adjustment value, the power adjustment value corresponding to the predicted temperature warning condition met by the predicted temperature and the predicted temperature rise in the first time is taken as a first candidate power adjustment value; based on a preset mapping relationship between the temperature and humidity warning condition and the power adjustment value, the power adjustment value corresponding to the temperature and humidity warning condition met by the current temperature and humidity data in the first time is taken as a second candidate power adjustment value; the first candidate power adjustment value and the second candidate power adjustment value are weighted and summed to obtain the current charging power adjustment value.

[0008] Optionally, the output power of the charging device output to the charging vehicle is adjusted according to the current charging power adjustment value, including: when the current charging power adjustment value is negative, the output power of the auxiliary charging power module is preferentially reduced in sequence, and then the output power of the main charging power module is reduced in sequence; when the current charging power adjustment value is positive, the output power of the main charging power module is preferentially increased in sequence, and then the output power of the auxiliary charging power module is increased in sequence.

[0009] Optionally, the corresponding charging power module is controlled to charge the vehicle, including: obtaining the vehicle parameters of the charging vehicle connected to the current charging gun; wherein the vehicle parameters include the vehicle battery type and the vehicle battery production time; based on a preset mapping relationship between the vehicle battery type and the charging curve, the charging curve corresponding to the vehicle battery type of the charging vehicle is taken as the initial charging curve; adjusting the constant voltage charging time in the initial charging curve according to the vehicle battery production time to obtain a target charging curve; controlling the charging power module connected by the current charging gun to charge the vehicle according to the target charging curve.

[0010] Optionally, the charging power distribution method further includes: obtaining the current date and the maximum charging voltage of the charging vehicle connected to each charging gun; When the current date is a charging peak date, charging vehicles with a maximum charging voltage greater than a preset voltage threshold are regarded as high-power charging vehicles, and charging vehicles with a maximum charging voltage not greater than the preset voltage threshold are regarded as low-power charging vehicles, and charging power modules are preferentially allocated to the high-power charging vehicles.

[0011] Optionally, the charging power allocation method further comprises: When it is detected that the charging vehicle is connected to the corresponding charging gun, the connection between the main charging power module of the corresponding charging gun of the charging vehicle and other charging guns is disconnected, and the state of the main charging power module of the corresponding charging gun of the charging vehicle is set to a usable state.

[0012] In a second aspect, the present application provides a charging system, comprising: a plurality of charging guns, a plurality of charging power modules, a plurality of power switches, an environment acquisition module and a control module; The input end of each charging gun is connected to the direct current end of each charging power module through a corresponding power switch; the alternating current end of each charging power module is connected to an alternating current bus through a power switch, and the alternating current bus is connected to an external alternating current power supply through a circuit breaker; the control module is connected to the plurality of charging guns, the plurality of charging power modules and the plurality of power switches; the environment acquisition module is connected to the control module; The control module is used to execute the charging power allocation method of any one of the preceding aspects to realize charging for charging vehicles connected to the charging system.

[0013] Optionally, the charging power module comprises: a main charging power module and an auxiliary charging power module; The main charging power module is arranged in one-to-one correspondence with the charging gun; the direct current end of the main charging power module is connected to the corresponding charging gun, and the direct current end of the main charging power module is also connected to other charging guns through a corresponding power switch; the alternating current end of the main charging power module is connected to the alternating current bus through a corresponding power switch; The direct current end of the auxiliary charging power module is connected to each charging gun through a corresponding power switch, and the alternating current end of the auxiliary charging power module is connected to the alternating current bus through a corresponding power switch.

[0014] Optionally, the charging system further comprises: a lightning arrester; the lightning arrester is connected to the alternating current bus.

[0015] The beneficial effects of the embodiments of the present application are as follows: In the embodiments of the present application, the charging power module is precisely controlled according to the actual demand of the charging vehicle to improve the pertinence and rationality of the charging power distribution. In the charging process, the predicted environmental data of the location of the charging vehicle and the current temperature and humidity data of the charging equipment are comprehensively considered, the charging power adjustment value is obtained by means of the power determination model, and the output power is adjusted. By introducing the predicted environmental data, the influence of complex environmental changes on the charging process can be predicted in advance, and the charging power can be adjusted in advance to adapt to environmental changes. In combination with the current temperature and humidity data of the charging equipment, the equipment state can be monitored in real time, and safety problems such as overheating and short circuit of the equipment caused by environmental factors can be avoided in time. This way of dynamically optimizing the charging power greatly enhances the applicability of the charging power distribution method in complex environments, and can flexibly adjust according to the actual environmental conditions and equipment state, ensuring the safety and stability of the charging process.

[0016] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application can be realized and attained by the structure particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings described herein are intended to provide further understanding of the present application, and form a part of the present application. The illustrative embodiments of the present application and their description serve to explain the present application. They do not constitute an improper limitation on the present application. In the drawings: Figure 1 A general flowchart of the charging power distribution method in the embodiments of the present application is shown; Figure 2 A specific flowchart of the current charging power adjustment value determination method in the embodiments of the present application is shown; Figure 3 A specific flowchart of the charging curve compensation method in the embodiments of the present application is shown; Figure 4 A specific flowchart of the charging power module distribution method in the embodiments of the present application is shown; Figure 5 A charging system framework in the embodiments of the present application is shown. DETAILED DESCRIPTION

[0018] In order to make the purposes, technical solutions and beneficial effects of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0019] This application provides a charging power allocation method applied to a charging system. (See attached document.) Figure 1 As shown, the general flow of the charging power allocation method provided in this application embodiment is as follows: Step 101: Obtain the charging demand of the vehicle currently connected to the charging gun in the charging equipment.

[0020] Step 102: Based on the charging demand, control the connection between the corresponding charging power module and the current charging gun, and control the corresponding charging power module to charge the vehicle.

[0021] Step 103: During the charging process of the charging vehicle, acquire the predicted environmental data of the location of the charging vehicle and the current temperature and humidity data of the charging equipment; input the predicted environmental data and the current temperature and humidity data into the power determination model to obtain the current charging power adjustment value output by the power determination model; adjust the output power of the charging equipment to the charging vehicle through the current charging gun according to the current charging power adjustment value.

[0022] In practical applications, charging requirements may include the rated voltage, maximum allowable current, desired charging capacity, or the charging mode (such as fast charging or standard charging) selected by the user through the interface, as communicated by the vehicle's Battery Management System (BMS). Based on the charging requirements, the charging system controls the connection between the corresponding charging power module and the current charging gun. The charging power module can be multiple independent AC / DC or DC / DC converter units. The system then controls the corresponding charging power module to start charging the vehicle. Predicted environmental data refers to a set of time-series data obtained through an external meteorological service interface, characterizing the meteorological conditions of the charging equipment's geographical location within a specific future time period. Predicted environmental data includes predicted temperature, predicted humidity, predicted temperature rise, and other related data. Predicted temperature is a future forecast of ambient air temperature. Predicted humidity is a future forecast of ambient relative humidity. Predicted temperature rise is the rate of temperature change per unit time calculated based on the predicted temperature sequence, used to quantify the trend and intensity of environmental heating. Other related data includes wind speed, wind direction, and solar radiation intensity. Current temperature and humidity data are collected in real-time by sensors deployed inside the charging equipment, such as power module heat sinks and DC bus compartments, characterizing the internal microenvironment. This data includes the equipment's current temperature and humidity; the current temperature is the real-time temperature of key electrical components or the surrounding space, and the current humidity is the real-time relative humidity of the air inside the equipment. During the charging process, the charging system acquires real-time predicted environmental data of the vehicle's location and the current temperature and humidity data of the charging equipment. This data is then input into a pre-trained power determination model. The model analyzes the impact of environmental factors on the equipment's heat dissipation efficiency and battery electrochemical performance, calculating and outputting a current charging power adjustment value. This power determination model can be a machine learning model trained on historical operating data (such as a neural network or decision tree) or a physical model built based on thermodynamic equations and expert rules. The current charging power adjustment value can be a numerical power value or a power adjustment ratio. Based on this value, the charging system dynamically adjusts the actual power output to the vehicle via the charging gun by regulating the switching state of the charging power module or modulating its PWM control signal. For example, when hot weather is predicted and the internal temperature of the device is high, the model may output a negative adjustment value to reduce the output power, preventing the device from overheating and being damaged and the battery from aging faster; conversely, at night when it is cool and the device has good heat dissipation, the power can be increased to shorten the charging time.

[0023] In this embodiment, the charging power module is precisely controlled according to the actual needs of the charging vehicle, improving the targeting and rationality of charging power allocation. During the charging process, the predicted environmental data of the charging vehicle's location and the current temperature and humidity data of the charging equipment are comprehensively considered. A power determination model is used to derive the charging power adjustment value and adjust the output power accordingly. By introducing predicted environmental data, the impact of complex environmental changes on the charging process can be anticipated in advance, allowing for timely adjustments to the charging power to adapt to environmental changes. Combined with the current temperature and humidity data of the charging equipment, the equipment status can be monitored in real time, promptly preventing safety issues such as overheating and short circuits caused by environmental factors. This dynamic optimization of charging power greatly enhances the applicability of the charging power allocation method in complex environments, enabling flexible adjustments based on actual environmental conditions and equipment status, ensuring the safety and stability of the charging process.

[0024] In one possible implementation, the connection between the corresponding charging power module and the current charging gun is controlled according to the charging demand. This can be achieved, but is not limited to, the following methods: Determine whether the main charging power module corresponding to the current charging gun is in a usable state; If so, the main charging power module corresponding to the current charging gun will be connected to charge the vehicle. If the maximum output power of the main charging power module corresponding to the current charging gun cannot meet the charging demand, the main charging power module and / or auxiliary charging power module that are in use will be connected in sequence to charge the vehicle until the output power of the current charging gun to the vehicle meets the charging demand.

[0025] In practical applications, the charging power module includes a main charging power module and an auxiliary charging power module. Each main charging power module corresponds to a charging gun, and each main charging power module prioritizes charging external vehicles through its corresponding charging gun. When the corresponding charging gun is not connected, it charges external vehicles through other charging guns. The auxiliary charging power module can charge external vehicles through any connected charging gun. The charging system first determines whether the main charging power module preset for the current charging gun is in an available state. An available state means that the charging power module has no fault alarms, has not reached its temperature or power limit, and is not locked by the charging system logic. If the main module is available, it is prioritized for connection as the core power source for charging. When the vehicle's charging demand exceeds the maximum output power of the main module, the charging system initiates a dynamic expansion process, sequentially connecting other available power modules in the charging system to the current charging gun. This sequential connection can follow a preset priority order, such as prioritizing other idle main charging power modules. If the demand is still not met, then auxiliary charging power modules dedicated to power supplementation are connected. The process of connecting charging power modules is cumulative, until the combined output power of all connected modules can meet the vehicle's charging needs. This achieves pooling and flexible allocation of charging power resources, enabling a single charging gun to overcome the power limitations of a single module and provide higher-power charging services, greatly improving the utilization rate of the entire charging infrastructure.

[0026] In one possible implementation, see [reference] Figure 2 As shown, the predicted environmental data and current temperature and humidity data are input into the power determination model to obtain the current charging power adjustment value output by the power determination model. This can be done in, but is not limited to, the following ways: Step 201: Determine the predicted temperature and predicted temperature rise in the first time period based on the predicted environmental data; based on the preset mapping relationship between the predicted temperature warning conditions and the power adjustment value, take the power adjustment value corresponding to the predicted temperature warning conditions satisfied by the predicted temperature and predicted temperature rise in the first time period as the first candidate power adjustment value.

[0027] In practical applications, the charging system determines the predicted temperature and predicted temperature rise within a specific timeframe based on acquired environmental forecast data. The predicted temperature refers to the forecast temperature value for the location of the charging equipment within a specific timeframe, obtained from an authoritative meteorological service interface. The predicted temperature can be an instantaneous value or the highest temperature value within that timeframe. The predicted temperature rise refers to the rate of change of the ambient temperature within that timeframe. It is calculated by dividing the difference between the predicted temperature at the end and beginning of that timeframe by the time length. The predicted temperature rise quantifies the intensity of environmental heating. The choice of the first timeframe is related to the thermal inertia of the equipment. For equipment with smaller heat capacity, a shorter prediction timeframe can be selected for rapid response; for large charging piles or charging systems with high thermal inertia, a longer timeframe can be selected to anticipate longer-term trends and achieve smoother power control. The charging system internally stores a predicted temperature warning condition-power adjustment value mapping table, which defines different levels of predicted temperature warning conditions and their corresponding power adjustment values. The predicted temperature warning conditions are a set of preset rules based on predicted temperature and predicted temperature rise data from the predicted environmental data. These rules are logically compared with preset temperature and temperature rise thresholds to determine the thermal risk level. Each predicted warning condition corresponds to a power adjustment value. The charging system can use a lookup table to select the power adjustment value corresponding to the predicted temperature warning condition that meets the predicted temperature and predicted temperature rise in the first time period as the first candidate power adjustment value.

[0028] Step 202: Based on the preset mapping relationship between temperature and humidity warning conditions and power adjustment values, the power adjustment value corresponding to the temperature and humidity warning conditions satisfied by the current temperature and humidity data in the first time period is taken as the second candidate power adjustment value.

[0029] In practical applications, the charging system also stores a temperature and humidity warning condition-power adjustment value mapping table. This table defines different levels of temperature and humidity warning conditions and their corresponding power adjustment values. The temperature and humidity warning conditions are a set of pre-defined rules based on real-time collected temperature and humidity data within the device. These data are logically combined and compared with preset temperature and humidity thresholds to determine the electrical safety and heat dissipation risk levels within the device. Each temperature and humidity warning condition corresponds to a power adjustment value. The charging system can use a lookup table to select the power adjustment value corresponding to the temperature and humidity warning condition that the current temperature and humidity data meets in the first time frame as the second candidate power adjustment value.

[0030] Step 203: Perform a weighted summation of the first candidate power adjustment value and the second candidate power adjustment value to obtain the current charging power adjustment value.

[0031] In practical applications, the weighting coefficients of the weighted sum can be configured and adjusted based on the importance of the module, the reliability of the data, or seasonal factors. For example, in summer, the weighting coefficient of the first candidate power adjustment value is greater than that of the second candidate power adjustment value; in winter, the weighting coefficient of the first candidate power adjustment value is less than that of the second candidate power adjustment value; and in spring and autumn, the weighting coefficient of the first candidate power adjustment value is equal to that of the second candidate power adjustment value. The result of the weighted sum of the first and second candidate power adjustment values ​​is the final "current charging power adjustment value". This method combines macro-environmental trends and micro-equipment status, making power decisions both forward-looking and real-time, realizing closed-loop intelligent control from "sensing-response" to "prediction-prevention".

[0032] In one possible implementation, adjusting the output power of the charging equipment to the charging vehicle based on the current charging power adjustment value can be achieved in, but is not limited to, the following ways: When the current charging power adjustment value is negative, the output power of the auxiliary charging power module is reduced first, and then the output power of the main charging power module is reduced. When the current charging power adjustment value is positive, the output power of the main charging power module is increased first, followed by the output power of the auxiliary charging power module.

[0033] In practical applications, when the current charging power adjustment value output by the power determination model is negative, indicating a need to reduce the total output power, the charging system performs a power reduction operation. In this case, the output power of the connected auxiliary charging power modules is reduced sequentially until they are all turned off or reduced to their minimum. If the power reduction is still insufficient, the output power of the main charging power modules is then reduced sequentially. This "auxiliary first, main second" strategy aims to ensure that each charging gun has at least its corresponding main module as a basic power supply, maintaining the basic stability of the charging service, while using auxiliary modules as flexible power buffer units. Conversely, when the current charging power adjustment value output by the power determination model is positive, indicating a need to increase the total output power, the charging system performs a power increase operation. In this case, the output power of the connected main charging power modules is increased to their rated maximum value first. If there is still a power shortfall, the power of the auxiliary charging power modules is then activated or increased sequentially. This "main first, auxiliary second" strategy prioritizes the use of the generally superior and more directly connected main modules, helping to improve overall energy efficiency and charging quality, and reducing the frequent start-stop of auxiliary modules, thereby extending the lifespan of the entire charging system.

[0034] In practice, to ensure the reliability of the charging process and prevent the vehicle's Battery Management System (BMS) from misinterpreting a sudden, abrupt change in output power as a fault and triggering a protective "shutdown," the charging system, after determining the target power value to be adjusted, will not directly and instantaneously issue this target power value to the charging power module. Instead, the charging system will generate a power ramp command. The power ramp command specifies a gradual change in power from the current output power to the target power value at a preset, controllable slope. The power ramp slope can be configured based on the vehicle's BMS communication protocol, battery type, or historical charging data. For example, for vehicles with weak communication quality, a gentler power ramp slope is used; for emergency situations requiring a power reduction, a relatively steeper but still safe power ramp slope is used.

[0035] Furthermore, to address the risk of excessive instantaneous circulating current or current difference caused by momentary inconsistencies in output voltage between multiple charging power modules when they are connected in parallel, which could damage power devices, trigger protective shutdowns, or even cause the charging pump to trip at the vehicle end, the following measures are taken in the power module connection process. When the system decides to connect one or more additional charging power modules on top of the existing connected modules, the control module does not immediately connect the module to be connected. Instead, the control module sends the vehicle's charging demand voltage as the target voltage to the module to be connected. Upon receiving the instruction, the module precisely adjusts its output voltage to match the target voltage. The system continuously monitors and compares the difference between the output voltage of the module to be connected and the DC bus voltage. The system sets a very small preset voltage difference threshold. Only when the difference between the output voltage of the module to be connected and the vehicle's charging demand voltage is less than the preset voltage difference threshold does the control module issue an instruction to connect the module.

[0036] In one possible implementation, see [reference] Figure 3 As shown, controlling the corresponding charging power module to charge the charging vehicle includes: Step 301: Obtain the vehicle parameters of the charging vehicle currently connected to the charging gun; the vehicle parameters include the vehicle battery type and battery production time.

[0037] In practical applications, when the charging power module is controlling the charging vehicle, the charging system first obtains the vehicle's battery type and battery production time. The vehicle battery type can be obtained through BMS communication, and the vehicle battery type can be NMC ternary lithium, LFP lithium iron phosphate, or solid-state battery, etc. The battery production time can be obtained from vehicle VIN code parsing or BMS communication. The battery production time can be used to estimate the battery's state of health (SOH).

[0038] Step 302: Based on the preset mapping relationship between vehicle battery type and charging curve, the charging curve corresponding to the vehicle battery type of the charging vehicle is used as the initial charging curve.

[0039] In practical applications, the charging system pre-stores the mapping relationship between different battery types and standard charging curves. Based on the acquired battery type, the corresponding charging curve can be retrieved as the initial charging curve. This charging curve includes current and voltage parameters for the constant current charging stage, the constant voltage charging stage, and the trickle charging stage.

[0040] Step 303: Adjust the constant voltage charging time in the initial charging curve according to the vehicle battery production time to obtain the target charging curve.

[0041] In practical applications, the charging system calculates the battery's aging level based on the vehicle battery's production time; the earlier the battery was manufactured, the higher its aging level assessment value. According to a preset mapping relationship between the aging level assessment value and the charging time adjustment coefficient, the corresponding time adjustment coefficient is determined as the current time adjustment coefficient. Finally, the standard constant-voltage charging time in the initial charging curve is multiplied by the current time adjustment coefficient to obtain the optimized constant-voltage charging time, thus generating the final target charging curve. By quantifying the impact of battery aging on charging characteristics and dynamically extending the constant-voltage stage to compensate for the decrease in charging efficiency of aging batteries, the effective charging capacity is increased while ensuring battery safety.

[0042] In practice, the charging system quantifies the degree of battery aging using a pre-defined battery aging model. First, the system calculates the battery's usage time based on the current date and the vehicle battery's manufacturing date. Then, it substitutes this usage time into a pre-defined calculation function whose output value remains constant or monotonically increases with the input age, thus obtaining a normalized aging degree assessment value. This function can be a piecewise linear function mapping age to the 0-1 interval, or an exponential function constructed based on typical battery degradation characteristics. Through this mechanism, the charging system can efficiently estimate the macroscopic aging state of the vehicle battery based solely on the static parameter of its manufacturing date, providing crucial input for customized charging strategies.

[0043] Step 304: Control the charging power module connected to the current charging gun to charge the vehicle according to the target charging curve.

[0044] In one possible implementation, see [reference] Figure 4 As shown, the charging power distribution method also includes: Step 401: Obtain the current date and the maximum charging voltage of each charging vehicle connected to each charging gun.

[0045] Step 402: When the current date is a peak charging date, vehicles with a maximum charging voltage greater than the preset voltage threshold are designated as high-power charging vehicles, and vehicles with a maximum charging voltage less than the preset voltage threshold are designated as low-power charging vehicles. Charging power modules are allocated to high-power charging vehicles first.

[0046] In practical applications, peak charging days refer to specific dates or date types identified through analysis of historical charging data or based on preset rules, where the expected load on the charging system is significantly higher than the normal average. The charging system obtains the current date and can combine it with historical statistical data or a preset calendar to determine whether the day is a peak charging day. Specifically, the charging system analyzes long-term operational data from historical statistics to automatically identify dates with consistently high load rates. For example, if a clustering algorithm finds that the average load on Saturdays and Sundays is more than 1.5 times that of weekdays, the charging system can automatically mark Saturdays and Sundays as peak charging days. The charging system pre-stores a calendar that includes statutory holidays, important public holidays, and regional specific event days. These specific dates are pre-defined as fixed peak charging days. Simultaneously, the charging system obtains the maximum charging voltage of each vehicle connected to each charging gun through handshake communication with the vehicle's BMS. The charging system sets a preset voltage threshold, identifying vehicles with a maximum charging voltage higher than this threshold as high-power charging vehicles and vehicles with a maximum charging voltage lower than this threshold as low-power charging vehicles. On peak days, when multiple vehicles are waiting to charge or power resources are scarce, the charging system prioritizes the connection requests and power needs of high-power vehicles, enabling them to charge quickly at maximum capacity. This reduces the time they occupy charging spots and increases overall throughput during peak periods. Low-power vehicles, on the other hand, can be charged when resources are available or at a lower power level. This strategy, based on operational efficiency, optimizes overall charging efficiency and maximizes the value of limited resources.

[0047] In one possible implementation, the charging power distribution method further includes: When a charging vehicle is detected to be connected to the corresponding charging gun, the connection between the main charging power module of the charging gun corresponding to the charging vehicle and other charging guns is disconnected, and the status of the main charging power module of the charging gun corresponding to the charging vehicle is set to the usable state.

[0048] In practical applications, when the charging system confirms through detection circuits or communication protocols that a vehicle has successfully connected to a charging gun, it immediately performs resource initialization. This involves controlling the power switch to disconnect the main charging power module corresponding to that charging gun from all other charging guns. The purpose of this is to exclusively allocate the main charging power module to the currently connected vehicle and charging gun, preventing power fluctuations or interruptions caused by accidental switching or sharing of the power module during charging. Simultaneously, the charging system marks this main charging power module as usable in its internal resource status table, but it is only available to the currently bound charging gun.

[0049] Based on the above embodiments, this application provides a charging system, see below. Figure 5 As shown, the charging system provided in this application embodiment includes at least: multiple charging guns 501, multiple charging power modules 502, multiple power switches 503, an environmental acquisition module 504, and a control module 505; The input terminal of each charging gun 501 is connected to the DC terminal of each charging power module 502 through a corresponding power switch 503; the AC terminal of each charging power module 502 is connected to the AC bus through the power switch 503, and the AC bus is connected to an external AC power source through a circuit breaker 506; the control module 505 is connected to multiple charging guns 501, multiple charging power modules 502, and multiple power switches 503; the environmental acquisition module 504 is connected to the control module 505. The control module 505 is used to execute the above-mentioned charging power distribution method to enable charging of vehicles connected to the charging system.

[0050] exist Figure 5In the charging system shown, multiple charging guns 501 are used to physically connect to electric vehicles; multiple charging power modules 502 efficiently and stably convert AC power from the power grid into DC power that meets the charging requirements of electric vehicle batteries; multiple power switches 503 form an electrical connection matrix, controlled by a control module 505, used to establish or disconnect electrical connections between each charging power module 502, charging gun 501, and AC bus. Power switches 503 can be AC ​​contactors. An environmental acquisition module 504 includes temperature and humidity sensors and a possible external meteorological data interface. The humidity sensor is used to collect real-time data such as the temperature of the power module heatsink and the humidity inside the cabinet. The external meteorological data interface is used to connect to an external meteorological service center to obtain predicted environmental data such as future ambient temperature, humidity, and wind speed. The input terminal of each charging gun 501 is connected to the DC output terminal of each charging power module 502 through a set of corresponding power switches 503, forming a matrix topology where a charging gun 501 can be connected to any charging power module 502. Each charging power module 502's AC input terminal is also connected to a common AC bus via a power switch 503. The AC bus is then connected to the external power grid's AC power supply via a main circuit breaker 506 to achieve power input. The control module 505 is connected to the control terminals of all charging guns 501, charging power modules 502, and power switches 503 via a communication bus, issuing control commands and collecting status information. The control module 505 can be a PLC, microprocessor, or server. An environmental acquisition module 504 is also connected to the control module 505. The control module 505 has a built-in program used to execute the above charging power distribution method, coordinate all hardware units, and ultimately provide efficient, safe, and adaptive charging services to multiple electric vehicles connected to the charging system.

[0051] In one possible implementation, see [reference] Figure 5 As shown, the charging power module 502 includes: a main charging power module 507 and an auxiliary charging power module 508; The main charging power module 507 is set up in a one-to-one correspondence with the charging gun 501; the DC terminal of the main charging power module 507 is connected to the corresponding charging gun 501, and the DC terminal of the main charging power module 507 is also connected to other charging guns 501 via the corresponding power switch 503; the AC terminal of the main charging power module 507 is connected to the AC bus via the corresponding power switch 503. The DC terminal of the auxiliary charging power module 508 is connected to each charging gun 501 via a corresponding power switch 503, and the AC terminal of the auxiliary charging power module 508 is connected to the AC bus via a corresponding power switch 503.

[0052] exist Figure 5In the charging system shown, the main charging power modules 507 and charging guns 501 are arranged in an approximately one-to-one correspondence. The DC output terminal of each main charging power module 507 is directly connected to its corresponding charging gun 501, and also connected to other charging guns 501 via a power switch 503, enabling dedicated use of the corresponding charging gun 501 and shared use with other charging guns 501. The AC input terminal of the main charging power module 507 is connected to the AC bus via a power switch 503. The auxiliary charging power module 508 is not fixedly assigned to any charging gun 501. The DC output terminal of the auxiliary charging power module 508 is connected to all charging guns 501 in the charging system via a switch matrix composed of multiple power switches 503. The AC input terminal of the auxiliary charging power module 508 is also connected to the AC bus via a power switch 503. This provides a stable and reliable basic power guarantee for each charging gun 501, while the shared auxiliary charging power module 508 provides considerable power flexibility for the charging system. Normally, the main charging power module 507 can be used for operation, resulting in low energy consumption. During peak periods or when there is a high demand for power, the auxiliary charging power module 508 can be dynamically activated to provide power on demand, achieving a balance between cost, efficiency, and flexibility.

[0053] In one possible implementation, see [reference] Figure 5 As shown, the charging system also includes: surge protector 509; surge protector 509 is connected to the AC bus.

[0054] exist Figure 5 In the charging system shown, the surge protector 509 is connected in parallel between the AC bus and ground, and is typically installed on the power supply side of the main circuit breaker 506. Its function is to quickly conduct when the power grid experiences a transient overvoltage (surge) due to lightning strikes, switching operations, etc., discharging the large surge current to the ground, thereby protecting all connected charging power modules 502 and other sensitive electronic equipment from damage.

[0055] It should be noted that the principle of the charging system provided in this application embodiment to solve the technical problem is similar to the charging power allocation method provided in this application embodiment. Therefore, the implementation of the charging system provided in this application embodiment can refer to the implementation of the charging power allocation method provided in this application embodiment, and the repeated parts will not be described again.

[0056] It should be noted that although several units or sub-units of the device have been mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, according to embodiments of this application, the features and functions of two or more units described above can be embodied in one unit. Conversely, the features and functions of one unit described above can be further divided and embodied by multiple units.

[0057] Furthermore, although the operations of the method of this application are described in a specific order in the accompanying drawings, this does not require or imply that these operations must be performed in that specific order, or that all the operations shown must be performed to achieve the desired result. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step, and / or one step may be broken down into multiple steps.

[0058] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0059] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this application without departing from the spirit and scope of the embodiments of this application. Therefore, if these modifications and variations to the embodiments of this application fall within the scope of the claims of this application and their equivalents, this application also intends to include these modifications and variations.

Claims

1. A charging power distribution method, characterized in that, include: Obtain the charging demand of the vehicle currently connected to the charging gun in the charging equipment; According to the charging demand, control the connection between the corresponding charging power module and the current charging gun, and control the corresponding charging power module to charge the vehicle. During the charging process of the charging vehicle, the predicted environmental data of the location of the charging vehicle and the current temperature and humidity data of the charging equipment are acquired; the predicted environmental data and the current temperature and humidity data are input into the power determination model to obtain the current charging power adjustment value output by the power determination model; the output power of the charging equipment to the charging vehicle through the current charging gun is adjusted according to the current charging power adjustment value.

2. The charging power distribution method as described in claim 1, characterized in that, The step of controlling the connection between the corresponding charging power module and the current charging gun according to the charging demand includes: Determine whether the main charging power module corresponding to the current charging gun is in a usable state; If so, the main charging power module corresponding to the current charging gun is connected to charge the vehicle; if the maximum output power of the main charging power module corresponding to the current charging gun cannot meet the charging requirements, the main charging power module and / or auxiliary charging power module that are in use are connected in sequence to charge the vehicle until the output power of the current charging gun to the vehicle meets the charging requirements.

3. The charging power distribution method as described in claim 1, characterized in that, The step of inputting the predicted environmental data and the current temperature and humidity data into the power determination model to obtain the current charging power adjustment value output by the power determination model includes: The predicted temperature and predicted temperature rise within the first time period are determined based on the predicted environmental data. Based on the preset mapping relationship between the predicted temperature warning conditions and the power adjustment value, the power adjustment value corresponding to the predicted temperature warning conditions satisfied by the predicted temperature and predicted temperature rise within the first time period is taken as the first candidate power adjustment value. Based on the preset mapping relationship between temperature and humidity warning conditions and power adjustment values, the power adjustment value corresponding to the temperature and humidity warning conditions satisfied by the current temperature and humidity data in the first time period is taken as the second candidate power adjustment value. The first candidate power adjustment value and the second candidate power adjustment value are weighted and summed to obtain the current charging power adjustment value.

4. The charging power distribution method as described in claim 2, characterized in that, The step of adjusting the output power of the charging equipment to the charging vehicle according to the current charging power adjustment value includes: When the current charging power adjustment value is negative, the output power of the auxiliary charging power module is reduced first, and then the output power of the main charging power module is reduced first. When the current charging power adjustment value is positive, the output power of the main charging power module is increased first, and then the output power of the auxiliary charging power module is increased in turn.

5. The charging power distribution method as described in claim 1, characterized in that, The control module corresponding to the charging power module charges the charging vehicle, including: Obtain the vehicle parameters of the charging vehicle currently connected to the charging gun; wherein, the vehicle parameters include the vehicle battery type and battery production time; Based on the preset mapping relationship between vehicle battery type and charging curve, the charging curve corresponding to the vehicle battery type of the charging vehicle is used as the initial charging curve. The constant voltage charging duration in the initial charging curve is adjusted according to the vehicle battery production time to obtain the target charging curve. The charging power module connected to the current charging gun is controlled to charge the vehicle according to the target charging curve.

6. The charging power distribution method according to any one of claims 1-5, characterized in that, Also includes: Get the current date and the maximum charging voltage of each charging vehicle connected to each charging gun; When the current date is a peak charging date, charging vehicles with a maximum charging voltage greater than a preset voltage threshold are designated as high-power charging vehicles, and charging vehicles with a maximum charging voltage less than or equal to the preset voltage threshold are designated as low-power charging vehicles. The charging power module is preferentially allocated to the high-power charging vehicles.

7. The charging power distribution method as described in claim 6, characterized in that, Also includes: When a charging vehicle is detected to be connected to the corresponding charging gun, the connection between the main charging power module of the charging gun corresponding to the charging vehicle and other charging guns is disconnected, and the status of the main charging power module of the charging gun corresponding to the charging vehicle is set to the usable state.

8. A charging system, characterized in that, include: Multiple charging guns, multiple charging power modules, multiple power switches, environmental acquisition module, and control module; Each charging gun's input terminal is connected to the DC terminal of each charging power module via a corresponding power switch; each charging power module's AC terminal is connected to an AC bus via a power switch, and the AC bus is connected to an external AC power source via a circuit breaker; the control module is connected to multiple charging guns, multiple charging power modules, and multiple power switches; the environmental acquisition module is connected to the control module. The control module is used to execute the charging power allocation method as described in any one of claims 1-7, so as to charge the charging vehicles connected to the charging system.

9. The charging system as described in claim 8, characterized in that, The charging power module includes: a main charging power module and an auxiliary charging power module; The main charging power module is configured to correspond one-to-one with the charging gun; the DC terminal of the main charging power module is connected to the corresponding charging gun, and the DC terminal of the main charging power module is also connected to other charging guns via a corresponding power switch; the AC terminal of the main charging power module is connected to the AC bus via a corresponding power switch. The DC terminal of the auxiliary charging power module is connected to each charging gun via a corresponding power switch, and the AC terminal of the auxiliary charging power module is connected to the AC bus via a corresponding power switch.

10. The charging system as described in claim 9, characterized in that, Also includes: Surge protector; the surge protector is connected to the AC busbar.

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