Charging control method and apparatus, storage and charging integrated system, medium, and program product

Abstract

A charging control method and apparatus, a storage and charging integrated system (21), a medium, and a program product. The charging control method comprises: determining a load rate of an access point where the storage and charging integrated system (21) is connected to a power grid (6), wherein the storage and charging integrated system (21) comprises a charging apparatus (213) and an energy storage apparatus (212); on the basis of the load rate of the access point, determining a working mode of the storage and charging integrated system (21) and a power consumption object corresponding to the working mode, wherein the working mode comprises a power supply mode and a charging mode, the power supply mode comprises conveying the electrical energy in an electric device to the energy storage apparatus (212) and / or the power grid (6), and conveying the electrical energy of the energy storage apparatus (212) to the power grid (6) and / or the electric device for power supply, and the charging mode comprises conveying the electrical energy of the power grid (6) to the energy storage apparatus (212) and / or the electric device for charging; on the basis of the power consumption object, determining working parameters corresponding to the working mode of the storage and charging integrated system (21), wherein the power consumption object comprises at least one of the energy storage apparatus (212), the power grid (6), and the electric device; and controlling the storage and charging integrated system (21) to work at the working parameters.

Description

Charging control methods, devices, integrated charging and storage systems, media and program products

[0001] Cross-reference to related applications

[0002] This disclosure is based on and claims priority to Chinese Patent Application No. 202410918852.2, filed on July 10, 2024, entitled “Charging Control Method, Apparatus, Integrated Storage and Charging System, Medium and Program Product”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to, but is not limited to, the field of charging and discharging technology, and in particular to a charging control method, device, integrated storage and charging system, medium, and program product. Background Technology

[0004] Currently, with the rapid increase in electrical equipment, charging piles have a significant impact on the power grid when operating at full capacity. This results in insufficient grid capacity and poor power quality during peak electricity consumption periods, leading to slow charging of electrical equipment and a poor user experience. Summary of the Invention

[0005] In view of the above, embodiments of this disclosure provide a charging control method, apparatus, integrated energy storage and charging system, medium, and program product.

[0006] The technical solution disclosed herein is implemented as follows:

[0007] In a first aspect, embodiments of this disclosure provide a charging control method applied to an integrated energy storage and charging system. The integrated energy storage and charging system includes an energy storage device and a charging device. One end of the energy storage device is connected to the power grid via a DC bus; the other end of the energy storage device is connected to the charging device. The energy storage device is used to charge the battery of an electrical device via the charging device, or to output electrical energy from the energy storage device to the DC bus. One end of the charging device is connected to a charging gun, and the other end is connected to the DC bus. The charging device is used to transmit electrical energy from the electrical device to the energy storage device and / or the power grid, or to transmit electrical energy from the power grid and / or the energy storage device to the electrical device. The charging control method includes: determining the integrated energy storage and charging system... The load rate of the connection point of the energy storage and charging system to the power grid is determined; based on the load rate of the connection point, the operating mode of the integrated energy storage and charging system and the corresponding power consumption objects are determined; wherein, the operating mode includes a power supply mode and a charging mode; the power supply mode includes transmitting electrical energy from the power consumption device to the energy storage device and / or the power grid, and transmitting electrical energy from the energy storage device to the power grid and / or the power consumption device; the charging mode includes transmitting electrical energy from the power grid to the energy storage device and / or the power consumption device; based on the power consumption objects, the operating parameters corresponding to the operating mode of the integrated energy storage and charging system are determined; wherein, the power consumption objects include at least one of the energy storage device, the power grid, and the power consumption devices; the integrated energy storage and charging system is controlled to operate according to the operating parameters.

[0008] In this embodiment, on the one hand, by adjusting its operating mode according to the load rate of the connection point of the integrated energy storage and charging system to the power grid, the integrated energy storage and charging system can optimize its operation based on real-time energy demand and supply, thereby improving the efficiency of electricity use. On the other hand, by integrating energy storage devices, the integrated energy storage and charging system can achieve energy self-sufficiency to a certain extent.

[0009] In some embodiments, the operating mode of the integrated energy storage and charging system and the corresponding power user are determined based on the load rate of the access point, including: in response to a charging event of the power user, determining the estimated charging period of the power user; determining the load rate of the access point during the estimated charging period based on the estimated charging period; and determining the operating mode of the integrated energy storage and charging system and the corresponding power user based on the load rate of the access point during the estimated charging period.

[0010] In this embodiment of the disclosure, on the one hand, by predicting the load rate of the access point during the estimated charging period based on the estimated charging period of the electrical equipment, the accuracy of the load rate can be improved; on the other hand, by determining the working mode of the integrated energy storage and charging system based on the load rate of the access point during the estimated charging period, the integrated energy storage and charging system can quickly respond to various changes in power demand and flexibly adjust the working mode, which helps the integrated energy storage and charging system to better adapt to different power consumption scenarios and needs, and improve the adaptability and reliability of the integrated energy storage and charging system.

[0011] In some embodiments, determining the load rate of the access point during the estimated charging period based on the estimated charging period includes: determining the load rate of the access point during the first period as a first load rate when the estimated charging period is within a first period of grid power supply; and determining the load rate of the access point during the second period of the estimated charging period as a second load rate when the estimated charging period is within a second period of grid power supply; wherein the first period and the second period are different.

[0012] In this embodiment of the disclosure, by matching the estimated charging period with different periods of grid power supply, the load rate of the access point at different times can be predicted more accurately, which helps the integrated energy storage and charging system to utilize energy more effectively and reduce energy waste.

[0013] In some embodiments, based on the load rate of the access point during the estimated charging period, the operating mode of the integrated energy storage and charging system and the corresponding power user are determined, including: determining whether the load rate of the access point during the estimated charging period is greater than or equal to a first preset value; if the load rate is greater than or equal to the first preset value, determining the operating mode of the integrated energy storage and charging system as a power supply mode and the corresponding power user; the power supply mode includes supplying power to the power user through the energy storage device, and the power user is the power user; if the load rate is less than the first preset value, determining the operating mode of the integrated energy storage and charging system as a charging mode and the corresponding power user; the charging mode includes charging the power user through the power grid, and the power user is the power user.

[0014] In this embodiment of the disclosure, by setting a first preset value, the integrated energy storage and charging system can flexibly adjust its operating mode according to the load rate of the access point during the estimated charging period. When the load rate is high, the integrated energy storage and charging system can quickly switch to power supply mode to supply power to the electrical equipment through the energy storage device; while when the load rate is low, the integrated energy storage and charging system can select charging mode to charge the electrical equipment through the power grid. This flexibility allows the integrated energy storage and charging system to better adapt to changes in the power grid and the power demand of the electrical equipment.

[0015] In some embodiments, when the load rate is greater than or equal to a first preset value, determining the operating mode of the integrated energy storage and charging system as a power supply mode and the corresponding power user of the power supply mode includes: when the load rate is greater than or equal to the first preset value, obtaining the current state of charge value and / or remaining energy state value of the energy storage device; based on the state of charge value and / or remaining energy state value, determining whether the energy storage device can supply power to the grid; and when it is determined that the energy storage device can supply power to the grid, determining the power supply mode as supplying power to the grid through the energy storage device, and determining the power user as the grid.

[0016] In this embodiment of the disclosure, on the one hand, by using the state of charge value and / or remaining energy state value of the energy storage device, the integrated energy storage and charging system can accurately determine the power supply capacity of the energy storage device, thereby avoiding the attempt to supply power when the energy storage device is low on power, resulting in energy waste; on the other hand, when the load rate is high, if the energy storage device has sufficient power, it can supply power to the grid, helping to reduce the power supply pressure on the grid, thereby enhancing the stability of the grid.

[0017] In some embodiments, the charging control method further includes: determining, when it is determined that the energy storage device cannot supply power to the grid, the power supply mode is to supply power to the electrical device through the energy storage device, and determining that the object of power consumption is the electrical device.

[0018] In this embodiment of the disclosure, if the energy storage device has insufficient power to supply the power grid, but sufficient power to supply the electrical equipment, it can supply power to the electrical equipment to ensure the normal operation of the electrical equipment.

[0019] In some embodiments, when the load rate is less than a first preset value, determining the operating mode of the integrated energy storage and charging system as a charging mode and the corresponding power user includes: when the load rate is less than the first preset value, determining the charging mode includes charging the power user through the power grid, and the power user is the power user; or, when the load rate is less than the first preset value, and the state of charge value of the energy storage device is less than a preset state of charge threshold, and / or the state of remaining energy value is less than a preset remaining energy threshold, determining the charging mode includes charging the power user through the power grid and charging the energy storage device through the power grid, and the power user corresponds to the power user and the energy storage device.

[0020] In this embodiment of the disclosure, on the one hand, when the load rate is less than a first preset value, charging the electrical equipment through the power grid can reduce the energy loss caused by the discharge of the energy storage device and further improve energy utilization efficiency; on the other hand, when the load rate is less than the first preset value, and the state of charge value of the energy storage device is less than a preset charge threshold, and / or the state of remaining energy value is less than a preset remaining energy threshold, charging the energy storage device through the power grid can make full use of the charging capacity of the power grid and improve energy utilization efficiency.

[0021] In some embodiments, the integrated energy storage and charging system is connected to the DC bus, and the power grid is connected to the DC bus through a low-voltage distribution transformer. The charging control method further includes: acquiring actual operating data of the connection point; the actual operating data includes voltage and frequency; when the voltage deviation value is greater than a second preset value, providing reactive power support to the power grid through the low-voltage distribution transformer; when the frequency deviation value is greater than a third preset value, providing active power support to the power grid through the low-voltage distribution transformer.

[0022] In this embodiment of the disclosure, on the one hand, when the voltage offset exceeds a second preset value, reactive power support is provided to the power grid through a low-voltage distribution transformer, which helps to adjust the voltage level of the power grid and ensure the stable operation of the power grid; on the other hand, when the frequency offset exceeds a third preset value, active power support is provided to the power grid through a low-voltage distribution transformer, which helps to adjust the frequency level of the power grid and ensure the stable operation of the power grid.

[0023] In some embodiments, the charging control method further includes: sending a power outage event to the owner of the power grid when the current at the access point is 0, so that the owner of the power grid can choose whether to start the backup power supply; and in response to the owner of the power grid choosing to start the backup power supply, supplying power to the electrical equipment through the low-voltage distribution transformer.

[0024] In this embodiment of the disclosure, on the one hand, when the current at the access point is 0, a power outage event is sent to the owner of the power grid through the charging control device of the integrated energy storage and charging system, which helps the owner of the power grid to understand and handle the power outage situation in a timely manner; on the other hand, when the owner of the power grid decides to activate the backup power supply, power is supplied to the electrical equipment through the low-voltage distribution transformer, which can reduce the impact of the power outage event on production and life and improve the reliability of the power supply system.

[0025] Secondly, embodiments of this disclosure provide a charging control device applied to an integrated energy storage and charging system, the integrated system including an energy storage device and a charging device; wherein, one end of the energy storage device is connected to the power grid via a DC bus; the other end of the energy storage device is connected to the charging device; the energy storage device is used to charge the battery of an electrical device via the charging device, or to output electrical energy from the energy storage device to the DC bus; one end of the charging device is connected to a charging gun, and the other end is connected to the DC bus; the charging device is used to transmit electrical energy from the electrical device to the energy storage device and / or the power grid, or to transmit electrical energy from the power grid and / or the energy storage device to the electrical device; the charging control device includes:

[0026] The first determining module is used to determine the load rate of the access point of the integrated energy storage and charging system to the power grid;

[0027] The second determining module is used to determine the working mode of the integrated energy storage and charging system and the corresponding power consumption object based on the load rate of the access point; wherein, the working mode includes a power supply mode and a charging mode; the power supply mode includes transmitting the electrical energy in the power consumption device to the energy storage device and / or the power grid, and transmitting the electrical energy of the energy storage device to the power grid and / or the power consumption device; the charging mode includes transmitting the electrical energy of the power grid to the energy storage device and / or the power consumption device.

[0028] The third determining module is used to determine the working parameters corresponding to the working mode of the integrated energy storage and charging system based on the power consumption object; wherein the power consumption object includes at least one of the energy storage device, the power grid, and the power consumption equipment;

[0029] The control module is used to control the integrated storage and charging system to operate according to the working parameters.

[0030] Thirdly, this disclosure provides an integrated energy storage and charging system, comprising a charging device, an energy storage device, and a charging control device. One end of the energy storage device is connected to the power grid via a DC bus; the other end of the energy storage device is connected to the charging device. The energy storage device is used to charge the battery of an electrical device via the charging device, or to output the electrical energy in the energy storage device to the DC bus. One end of the charging device is connected to a charging gun, and the other end is connected to the DC bus. The charging device is used to transmit the electrical energy in the electrical device to the energy storage device and / or the power grid, or to transmit the electrical energy from the power grid and / or the electrical energy from the energy storage device to the electrical device. The charging control device is used to determine the integrated energy storage and charging system... The system determines the load rate of the access point to the power grid; based on the load rate of the access point, it determines the operating mode of the integrated energy storage and charging system and the corresponding power users; wherein, the operating mode includes a power supply mode and a charging mode; the power supply mode includes transmitting electrical energy from the power user to the energy storage device and / or the power grid, and transmitting electrical energy from the energy storage device to the power grid and / or the power user; the charging mode includes transmitting electrical energy from the power grid to the energy storage device and / or the power user; based on the power users, it determines the operating parameters corresponding to the operating mode of the integrated energy storage and charging system; wherein, the power users include at least one of the energy storage device, the power grid, and the power user; and it controls the integrated energy storage and charging system to operate according to the operating parameters.

[0031] Fourthly, embodiments of this disclosure provide a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements some or all of the steps in the above-described method.

[0032] Fifthly, embodiments of this disclosure provide a computer program product, including a computer program or instructions, which, when executed by a processor, implement some or all of the steps in the above-described method.

[0033] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and are not intended to limit the technical solutions of this disclosure. Attached Figure Description

[0034] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the specification, serve to illustrate the technical solutions of this disclosure.

[0035] Figure 1 is a schematic diagram of the composition structure of an integrated storage and charging system provided in an embodiment of this disclosure;

[0036] Figure 2 is a schematic diagram of the composition structure of an integrated storage and charging system provided in an embodiment of this disclosure;

[0037] Figure 3 is a schematic diagram of the implementation process of a charging control method provided in an embodiment of this disclosure;

[0038] Figure 4 is a schematic diagram of the composition structure of a charging control device provided in an embodiment of this disclosure. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the specific technical solutions of this disclosure will be further described in detail below with reference to the accompanying drawings of the embodiments of this disclosure. The following embodiments are used to illustrate this disclosure, but are not intended to limit the scope of this disclosure.

[0040] Unless otherwise defined, all technical and scientific terms used in this disclosure have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used in this disclosure is for the purpose of describing embodiments of this disclosure only and is not intended to be limiting of this disclosure.

[0041] In the following description, references to "some embodiments," "this embodiment," "this disclosure embodiment," and examples, etc., describe a subset of all possible embodiments. However, it is understood that "some embodiments" may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0042] If the application documents contain similar descriptions such as "first / second", the following explanation shall be added: In the following description, the terms "first / second / third" are used only to distinguish similar objects and do not represent a specific order of objects. It is understood that "first / second / third" may be interchanged in a specific order or sequence where permitted, so that the embodiments of this disclosure described herein can be implemented in an order other than that illustrated or described herein.

[0043] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which these embodiments pertain. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0044] A car charging pile equipped with a high-rate energy storage battery, due to the characteristics of the internal high-rate energy storage battery, enables the integrated energy storage and charging system to draw power from the grid at a low power (40-50 kilowatts (kW)) and charge electrical equipment (e.g., electric vehicles) at a high power (greater than or equal to 480 kW).

[0045] The following problems currently exist in distribution substations: (1) Insufficient capacity: The capacity of distribution substations is concentrated in the range of 200 to 1250 kVA, and the daily redundancy is usually 20% to 30%, that is, the redundancy capacity of a distribution substation is usually 40 to 375 kVA, which is far from enough to support traditional high-power charging piles; (2) Short-term heavy overload: The daily power consumption of distribution substations fluctuates greatly. In most cases, the peak load rate during the summer evening peak can rise to 90% to 110%, which poses a high safety risk and the risk of power outage due to insufficient capacity; (3) Poor power quality: Due to load fluctuations, the power supply of distribution substations may have problems such as temporary power outages, unstable voltage, and frequency fluctuations; (4) Poor response capability: For the upper-level power grid, the dispatchability and flexibility of general distribution substations are poor; (5) Unstable distributed new energy: Some distribution substations have distributed photovoltaic or wind power. Due to their instability and unpredictable power generation, they may cause a lot of wind and solar curtailment or affect the power quality of the distribution network.

[0046] Based on this, embodiments of this disclosure provide a charging control method, apparatus, integrated energy storage and charging system, medium, and program product. On one hand, by adjusting its operating mode according to the load rate of the connection point of the integrated energy storage and charging system to the power grid, the system can optimize its operation based on real-time energy demand and supply, thereby improving energy utilization efficiency. On the other hand, by integrating energy storage devices, the integrated energy storage and charging system can achieve energy self-sufficiency to a certain extent.

[0047] This disclosure proposes an integrated energy storage and charging system, as shown in Figures 1 and 2. The integrated energy storage and charging system 21 includes a charging device 213, an energy storage device 212, and a charging control device 214. Taking an electric vehicle as an example, this integrated energy storage and charging system is described. N integrated energy storage and charging systems 21 include N charging devices 213. The downstream of the N charging devices includes N charging guns 31 and N electric devices 41, where N is an integer greater than 1. The upstream of the N charging devices includes a cloud service 1. The integrated energy storage and charging system interacts with the cloud service 1, and the cloud service 1 interacts with the monitoring platform 5.

[0048] One end of the energy storage device is connected to the power grid via a DC bus; the other end of the energy storage device is connected to a charging device; the energy storage device is used to charge the battery of the electrical equipment via the charging device, or to output the electrical energy in the energy storage device to the DC bus; one end of the charging device is connected to a charging gun, and the other end is connected to the DC bus; the charging device is used to transmit the electrical energy in the electrical equipment to the energy storage device and / or the power grid, or to transmit the electrical energy from the power grid and / or the electrical energy from the energy storage device to the electrical equipment.

[0049] Taking charging device 213 as an example, the downstream of charging device 213 includes charging gun 31 and electric device 41. Charging control device 214 includes at least wireless communication device 211, energy storage device 212, and charging device 213. Energy storage device 212 and charging device 213 can interact. Wireless communication device 211 communicates with charging control device 214 and cloud service 1 respectively. One end of energy storage device 212 is connected to DC bus 9 to output electrical energy from energy storage device 212 to power grid 6; the other end of energy storage device 212 is connected to charging device 213 to charge electric device 41 through charging device 213 and charging gun 31. Energy storage device 212 is used to charge electric device 41 through charging device 213, or to output electrical energy from energy storage device 212 to DC bus 9.

[0050] The energy storage device 212 also includes a battery management system (BMS), which is responsible for monitoring the status of the batteries in the energy storage device, such as voltage, current, temperature and battery health status.

[0051] The charging device 213 includes a bidirectional DC / DC converter. One end of the charging device 213 is connected to the charging gun 31, and the other end is connected to the DC bus 9. The charging device 213 is used to transfer electrical energy from the electric device 41 to the energy storage device 212 and / or the DC bus 9 via the bidirectional DC / DC converter, or to transfer electrical energy from the DC bus 9 and / or the energy storage device 212 to the electric device 41. A bidirectional AC / DC converter 8 is connected at one end to the power grid 6 and at the other end to the DC bus 9. It is used to convert electrical energy from the power grid 6 into DC power and then transfer it to the DC bus 9, or to convert electrical energy from the DC bus 9 into AC power and then transfer it to the power grid 6. The charging device 213 also includes a charging control unit (CCU).

[0052] In some embodiments, the charging control device may be independently set outside the energy storage device and the bidirectional DC / DC module in the integrated energy storage and charging system, and is used to control the operation of the integrated energy storage and charging system. For example, the charging control device may be an EMS, in which case the EMS can communicate with the BMS in the energy storage device and the CCU in the bidirectional DC / DC module.

[0053] In other embodiments, the functions implemented by the charging control device can also be integrated with various sub-modules of the integrated energy storage and charging system (e.g., energy storage device and bidirectional DC / DC module) for coordinated control of the operation of the integrated energy storage and charging system. For example, all or part of the functions implemented by the charging control device are integrated into the CCU of the bidirectional DC / DC module, or all or part of the functions implemented by the charging control device are integrated into the BMS of the energy storage device.

[0054] It should be noted that this type of system, which includes both energy storage and charging devices, can be called an integrated energy storage and charging system, or an integrated energy storage and charging machine or an integrated charge-discharge machine. This integrated energy storage and charging system supports multiple charging modes, meeting the charging needs of various devices in different scenarios. Furthermore, currently, providing different charging modes to users simultaneously is achieved by configuring additional transformers or expanding existing transformers. However, this method not only increases construction costs but also the floor space required. In contrast, this integrated energy storage and charging system can provide multiple charging modes to users simultaneously without the need for additional transformers, thus reducing construction costs.

[0055] This disclosure provides a charging control method applied to an integrated energy storage and charging system. The integrated energy storage and charging system includes an energy storage device and a charging device. One end of the energy storage device is connected to the power grid via a DC bus; the other end of the energy storage device is connected to the charging device. The energy storage device is used to charge the battery of an electrical device via the charging device, or to output electrical energy from the energy storage device to the DC bus. One end of the charging device is connected to a charging gun, and the other end is connected to the DC bus. The charging device is used to transmit electrical energy from the electrical device to the energy storage device and / or the power grid, or to transmit electrical energy from the power grid and / or the energy storage device to the electrical device. As shown in FIG3, the charging control method may include the following steps S310 to S340, wherein:

[0056] Step S310: Determine the load rate of the access point of the integrated energy storage and charging system to the power grid;

[0057] As shown in Figures 1 and 2, the integrated charging and energy storage system includes a charging device 213 and an energy storage device 212. The charging device has intelligent identification capabilities, automatically matching the appropriate charging current to different electrical devices to avoid safety issues caused by excessive charging current. While performing its charging function, the charging device can also work collaboratively with the energy storage device to optimize energy utilization. For example, when the grid load is low, the charging device can use the stored energy to supply power to the grid, reducing the grid load; when the grid load is high, the charging device can use the stored energy to supply power to electrical devices, alleviating grid pressure. The energy storage device primarily converts electrical energy into other forms of energy for storage and releases it when needed. Through energy storage technology, stable operation of electricity is achieved at the supply end (e.g., power plants), transmission end (e.g., the power grid), and consumption end (e.g., electrical devices), improving energy utilization efficiency. The energy storage device plays a role in peak shaving and valley filling in the power grid, mitigating the impact of large-scale instantaneous charging of electric vehicles on the grid. Through the charging and discharging management of the energy storage device, a smooth transition of grid load is achieved, improving the stability and reliability of grid operation.

[0058] Here, the load factor characterizes the busyness of the power supply line corresponding to the access point. In some implementations, the actual load at the access point of the integrated energy storage and charging system connected to the power grid can be collected by a data acquisition device or sensor, and the load factor of the access point can be determined based on the ratio of the actual load to the rated load. A higher load factor at the access point means that there are more electrical devices connected to the power supply line corresponding to the access point; a lower load factor at the access point means that there are fewer electrical devices connected to the power supply line corresponding to the access point.

[0059] Step S320: Based on the load rate of the access point, determine the working mode of the integrated energy storage and charging system and the power consumption objects corresponding to the working mode;

[0060] Here, the operating modes can include a power supply mode and a charging mode. The power supply mode corresponds to the power grid and / or electrical equipment, while the charging mode corresponds to the power consumption of energy storage devices and / or electrical equipment. Specifically, the power supply mode includes transmitting electrical energy from the electrical equipment to the energy storage device and / or the power grid, and transmitting electrical energy from the energy storage device to the power grid and / or the electrical equipment. The charging mode transmits electrical energy from the power grid to the energy storage device and / or the electrical equipment. The electrical equipment can be devices powered by electricity, such as electric vehicles, aircraft, ships, electric bicycles, electric toys, and other electronic devices with power batteries.

[0061] In some implementations, the operating mode of the integrated energy storage and charging system can be determined as either power supply mode or charging mode based on the load rate of the access point, thereby identifying the power user corresponding to either the power supply mode or the charging mode. For example, in the power supply mode, the power user can be the power grid and / or electrical equipment; in the charging mode, the power user can be the energy storage device and / or electrical equipment.

[0062] In some implementations, when the load factor at the access point is low, the integrated energy storage and charging system may be in charging mode, drawing energy from the grid and storing it in the energy storage device. When the load factor at the access point is high or the grid experiences power shortages, the integrated energy storage and charging system may enter power supply mode, providing power to the grid or electrical equipment through the energy storage device. In some cases, the integrated energy storage and charging system may be in both power supply and charging modes simultaneously; for example, when the load at the access point is moderate and the electricity price is low, the integrated energy storage and charging system may simultaneously draw power from the grid and supply power to electrical equipment.

[0063] Step S330: Based on the electricity user, determine the operating parameters corresponding to the working mode of the integrated energy storage and charging system;

[0064] Here, operating parameters can include power supply parameters and charging parameters. Power supply parameters include power supply power, and charging parameters include charging power. When the operating mode is power supply mode, the operating parameters can be power supply parameters; when the operating mode is charging mode, the operating parameters can be charging parameters.

[0065] It should be noted that since the power supply mode can be used for the power grid and / or electrical equipment, the power supply capacity may vary depending on the power supply mode. Similarly, since the charging mode can be used for the power storage device and / or electrical equipment, the charging capacity may vary depending on the power supply mode.

[0066] In some implementations, if the power user is the power grid, then when the working mode of the integrated energy storage and charging system is determined to be the power supply mode, the working parameter is determined to be the first power supply power; if the power user is an electrical device, then when the working mode of the integrated energy storage and charging system is determined to be the power supply mode, the working parameter is determined to be the second power supply power; wherein, the first power supply power and the second power supply power may be equal or unequal.

[0067] In some implementations, if the power user is an energy storage device, then when the operating mode of the integrated energy storage and charging system is determined to be the power supply mode, the operating parameter is determined to be the first charging power; if the power user is an electrical device, then when the operating mode of the integrated energy storage and charging system is determined to be the charging mode, the operating parameter is determined to be the second charging power; wherein, the first charging power and the second charging power may be equal or unequal.

[0068] Step S340: Control the integrated storage and charging system to operate according to the operating parameters.

[0069] In some implementations, after determining the operating parameters, the charging control device of the integrated charging and energy storage system manages the operation of the charging device and the energy storage device according to the operating parameters. For example, when the integrated charging and energy storage system is operating in charging mode, the charging control device controls the charging device to obtain electrical energy from the grid at a set charging power and time, and stores it in the energy storage device. When the integrated charging and energy storage system is operating in power supply mode, the charging control device controls the energy storage device to supply power to the grid and / or electrical equipment at a set power supply and time.

[0070] In some implementations, if the power user is the power grid and the integrated energy storage and charging system operates in power supply mode, then the charging control device controls the integrated energy storage and charging system to operate at a first power supply power; if the power user is an electrical device and the integrated energy storage and charging system operates in power supply mode, then the charging control device controls the integrated energy storage and charging system to operate at a second power supply power; if the power user is an energy storage device and the integrated energy storage and charging system operates in charging mode, then the charging control device controls the integrated energy storage and charging system to operate at a first charging power; if the power user is an electrical device and the integrated energy storage and charging system operates in charging mode, then the charging control device controls the integrated energy storage and charging system to operate at a second charging power.

[0071] In this embodiment, on the one hand, by adjusting its operating mode according to the load rate of the connection point of the integrated energy storage and charging system to the power grid, the integrated energy storage and charging system can optimize its operation based on real-time energy demand and supply, thereby improving the efficiency of electricity use. On the other hand, by integrating energy storage devices, the integrated energy storage and charging system can achieve energy self-sufficiency to a certain extent.

[0072] In some implementations, step S320, "determining the operating mode of the integrated energy storage and charging system and the corresponding power users based on the load rate of the access point," may include the following steps S321 to S323, wherein:

[0073] Step S321: In response to a charging event of the electrical device, determine the estimated charging period of the electrical device;

[0074] Here, a charging event can be either the receipt of a charging signal or the receipt of a charging message; the charging signal can refer to a signal that triggers the charging of the electrical device. In some embodiments, if the electrical device is an electric vehicle, the charging signal can be a signal triggered by the user inserting the charging gun into the electric vehicle. The charging message can be a message related to the charging of the electrical device set by the user on the display interface of a mobile terminal (e.g., mobile phone, computer, tablet, etc.). In some embodiments, if the electrical device is an electric vehicle, the charging message can originate from a charging request issued by the user through a user interface (e.g., mobile application, touch screen, etc.).

[0075] Here, the estimated charging period can refer to the time during which the electrical equipment needs to be charged. This charging period can be a time segment starting from the current moment or a time segment starting from a future moment. In some implementations, the integrated energy storage and charging system can estimate the estimated charging period of the electrical equipment based on the context information of the charging event (e.g., the user's historical charging habits, the current grid electricity price period, the user-set charging start time and charging end time, etc.).

[0076] Step S322: Based on the estimated charging period, determine the load rate of the access point during the estimated charging period;

[0077] Here, the integrated energy storage and charging system can combine the estimated charging period with the current grid status (e.g., real-time load, electricity price, etc.) to predict the load rate of the access point during the estimated charging period.

[0078] Step S323: Based on the load rate of the access point during the estimated charging period, determine the working mode of the integrated energy storage and charging system and the power users corresponding to the working mode.

[0079] In some implementations, the integrated energy storage and charging system can decide whether to enter power supply mode or charging mode based on the predicted load rate of the access point during the estimated charging period. For example, if the load rate is high, the integrated energy storage and charging system may preferentially enter power supply mode, supplying power to the grid and / or electrical appliances through the energy storage device to alleviate the load pressure on the grid. If the load rate is low, the integrated energy storage and charging system may choose to enter charging mode, drawing electrical energy from the grid and storing it in the energy storage device.

[0080] In this embodiment of the disclosure, on the one hand, by predicting the load rate of the access point during the estimated charging period based on the estimated charging period of the electrical equipment, the accuracy of the load rate can be improved; on the other hand, by determining the working mode of the integrated energy storage and charging system based on the load rate of the access point during the estimated charging period, the integrated energy storage and charging system can quickly respond to various changes in power demand and flexibly adjust the working mode, which helps the integrated energy storage and charging system to better adapt to different power consumption scenarios and needs, and improve the adaptability and reliability of the integrated energy storage and charging system.

[0081] In some embodiments, the implementation of step S322, "determining the load rate of the access point during the estimated charging period based on the estimated charging period," may include the following steps S3221 to S3222, wherein:

[0082] Step S3221: In the case of the first period when the charging time is estimated to be connected to the grid for power supply, the load rate of the access point in the first period is determined as the first load rate.

[0083] Here, the day is divided into different time periods based on varying electricity demand, and electricity prices are determined for each time period. The following explanation uses a day comprising a first and second time period as an example. The first time period represents the period with the highest electricity demand; it can also be called the peak electricity consumption period. The first time period includes periods with higher electricity prices, as well as the busy morning and afternoon electricity consumption periods.

[0084] In some implementations, after determining the estimated charging period, the load rate of the access point for the integrated energy storage and charging system to connect to the grid is predicted based on the first period of grid connection during the estimated charging period, and the load rate of the access point during the first period is determined as the first load rate. It should be noted that if the estimated charging period is the first period of grid connection, then the load rate of the access point is high, meaning that the current access point is in a busy electricity consumption period.

[0085] Step S3222: In the case of the second period when the grid power supply is connected during the estimated charging time, the load rate of the access point in the second period is determined as the second load rate; wherein the first period and the second period are different.

[0086] Here, the difference between the first and second time periods can mean that the first and second time periods do not overlap. The second time period represents the other time periods of the day besides the first time period. The second time period can also be called the off-peak electricity consumption period. The second time period can include periods with lower electricity prices as well as the idle electricity consumption periods at night and noon.

[0087] In some implementations, after determining the estimated charging period, the load rate of the access point for the integrated energy storage and charging system to connect to the grid is predicted based on the second period of grid power supply during the estimated charging period, and the load rate of the access point during the second period is determined as the second load rate. It should be noted that if the estimated charging period is during the second period of grid power supply, the load rate of the access point is low, meaning that the current access point is in an idle period.

[0088] In this embodiment of the disclosure, by matching the estimated charging period with different periods of grid power supply, the load rate of the access point at different times can be predicted more accurately, which helps the integrated energy storage and charging system to utilize energy more effectively and reduce energy waste.

[0089] In some embodiments, the implementation of step S323, "determining the operating mode of the integrated energy storage and charging system and the corresponding power user based on the load rate of the access point during the estimated charging period," may include the following steps S3231 to S3233, wherein:

[0090] Step S3231: Determine whether the load rate of the access point during the estimated charging period is greater than or equal to the first preset value;

[0091] Here, the first preset value is a suitable value set according to the load rate of the access point, such as 90%, 92%, 95%, etc. The following explanation will take a first preset value of 90% as an example.

[0092] In some implementations, if the load rate of the access point during the estimated charging period is 80%, then it is determined that the load rate of the access point during the estimated charging period is less than a first preset value of 90%; if the load rate of the access point during the estimated charging period is 98%, then it is determined that the load rate of the access point during the estimated charging period is greater than the first preset value of 90%.

[0093] Step S3232: When the load rate is greater than or equal to the first preset value, determine the working mode of the integrated storage and charging system as the power supply mode and the power consumption object corresponding to the power supply mode;

[0094] Here, the power supply mode includes supplying power to electrical equipment through energy storage devices, with the electrical equipment being the power consumer. If the load rate is greater than or equal to a first preset value, it indicates that the current power demand is high and may exceed the grid's immediate power supply capacity. In this case, the integrated energy storage and charging system will switch to power supply mode, utilizing the energy from the energy storage device to power the electrical equipment, which helps alleviate grid pressure and ensures the stability of power supply.

[0095] In some implementations, when the load rate of the access point during the estimated charging period is greater than or equal to a first preset value of 90%, the power supply mode of the integrated energy storage and charging system is determined to include supplying power to the electrical equipment through the energy storage device, and the electrical equipment is the power user.

[0096] Step S3233: When the load rate is less than the first preset value, determine the working mode of the integrated storage and charging system as the charging mode and the power consumption object corresponding to the charging mode.

[0097] Here, the charging mode includes charging the electrical equipment via the power grid, where the electrical equipment is the power consumer. If the load rate at the access point is less than a first preset value, it indicates that the current electricity demand is low and the power supply capacity of the power grid is sufficient. In this case, the integrated energy storage and charging system will switch to charging mode, using the surplus power of the power grid to charge the energy storage device for future use.

[0098] In some implementations, when the load rate of the access point during the estimated charging period is less than 90% (80%), the charging mode of the integrated energy storage and charging system is determined to include charging the electrical equipment via the power grid, where the electrical equipment is the power user.

[0099] In this embodiment of the disclosure, by setting a first preset value, the integrated energy storage and charging system can flexibly adjust its operating mode according to the load rate of the access point during the estimated charging period. When the load rate is high, the integrated energy storage and charging system can quickly switch to power supply mode to supply power to the electrical equipment through the energy storage device; while when the load rate is low, the integrated energy storage and charging system can select charging mode to charge the electrical equipment through the power grid. This flexibility allows the integrated energy storage and charging system to better adapt to changes in the power grid and the power demand of the electrical equipment.

[0100] In some embodiments, the implementation of step S3232, "when the load rate is greater than or equal to a first preset value, determining the operating mode of the integrated storage and charging system as power supply mode and the power consumption object corresponding to the power supply mode," may include the following steps S3321 to S3323, wherein:

[0101] Step S3321: When the load rate is greater than or equal to the first preset value, obtain the current state of charge value and / or remaining energy state value of the energy storage device.

[0102] Here, State of Charge (SOC) reflects the remaining capacity of an energy storage device and refers to the ratio of the device's current remaining charge to its rated charge. State of Energy (SOE) reflects the remaining energy of a battery and refers to the ratio of the battery's current remaining energy (releaseable energy) to its rated energy.

[0103] In some implementations, when the load rate at the access point is greater than or equal to a first preset value, the state of charge and / or remaining energy state of the energy storage device can be determined by the battery management system in the energy storage device.

[0104] Step S3322: Based on the state of charge value and / or remaining energy state value, determine whether the energy storage device can supply power to the grid;

[0105] In some implementations, the integrated energy storage and charging system assesses the energy storage device's ability to supply power to the grid based on its state of charge (SOC) and / or state of energy (SOE) values. If the SOC and / or SOE values ​​are high, the energy storage device is determined to be able to supply power to the grid; if the SOC and / or SOE values ​​are low, the energy storage device is determined not to supply power to the grid.

[0106] Step S3323: If it is determined that the energy storage device can supply power to the grid, the power supply mode is determined to be supplying power to the grid through the energy storage device, and the power user is determined to be the grid.

[0107] In some implementations, if the energy storage device is capable of supplying power to the grid, the integrated energy storage and charging system will provide power to the grid through the energy storage device to alleviate the burden on the grid.

[0108] In this embodiment of the disclosure, on the one hand, by using the state of charge value and / or remaining energy state value of the energy storage device, the integrated energy storage and charging system can accurately determine the power supply capacity of the energy storage device, thereby avoiding the attempt to supply power when the energy storage device is low on power, resulting in energy waste; on the other hand, when the load rate is high, if the energy storage device has sufficient power, it can supply power to the grid, helping to reduce the power supply pressure on the grid, thereby enhancing the stability of the grid.

[0109] In some embodiments, the charging control method may further include the following step S3324, wherein:

[0110] Step S3324: If it is determined that the energy storage device cannot supply power to the grid, the power supply mode is determined to be supplying power to the electrical equipment through the energy storage device, and the power user is determined to be the electrical equipment.

[0111] In some implementations, if the energy storage device has insufficient power to supply the grid but sufficient power to supply the electrical equipment, the integrated energy storage and charging system will supply power to the electrical equipment through the energy storage device to ensure the normal operation of the electrical equipment.

[0112] In this embodiment of the disclosure, if the energy storage device has insufficient power to supply the power grid, but sufficient power to supply the electrical equipment, it can supply power to the electrical equipment to ensure the normal operation of the electrical equipment.

[0113] In some embodiments, the implementation of step S3233, "when the load rate is less than a first preset value, determining the working mode of the integrated storage and charging system as charging mode and the power user corresponding to the charging mode," may include the following steps S3331 to S3332, wherein:

[0114] Step S3331: When the load rate is less than the first preset value, the charging mode is determined to include charging the electrical equipment through the power grid, and the electrical equipment is the object of power consumption.

[0115] In some implementations, when the load rate at the access point is less than a first preset value, the power supply capacity of the power grid is relatively strong. In this case, charging the electrical equipment through the power grid can reduce energy loss caused by the discharge of the energy storage device, further improving energy utilization efficiency.

[0116] Step S3332: When the load rate is less than the first preset value, the state of charge value of the energy storage device is less than the preset state of charge threshold, and / or the state of remaining energy value is less than the preset state of remaining energy threshold, the charging mode is determined to include charging the electrical equipment through the grid and charging the energy storage device through the grid. The electrical objects correspond to the electrical equipment and the energy storage device.

[0117] In some implementations, when the load rate of the access point is less than a first preset value, the state of charge (SOC) value of the energy storage device is compared with a preset SOC threshold, and / or the state of remaining energy (SOE) value is compared with a preset SOE threshold. If the SOC value is less than the preset SOC threshold, and / or the SOE value is less than the preset SOE threshold, the charging mode is determined to include charging the electrical equipment via the grid and charging the energy storage device via the grid. The electrical equipment and the energy storage device are the respective electrical users. The following explanation uses a preset SOC threshold of 50% and a preset SOE threshold of 50% as an example.

[0118] In some implementations, if the state of charge (SBC) of the energy storage device is 40%, then the SBC value of 40% is less than a preset charge threshold of 50%, thereby determining that the charging mode includes charging the electrical equipment through the grid and charging the energy storage device through the grid, with the electrical equipment and the energy storage device being the corresponding electrical users.

[0119] In some implementations, if the remaining energy state value of the energy storage device is 30%, then the remaining energy state value of 30% is less than the preset remaining energy threshold of 50%, thereby determining that the charging mode includes charging the electrical equipment through the grid and charging the energy storage device through the grid, with the electrical objects corresponding to the electrical equipment and the energy storage device.

[0120] In this embodiment of the disclosure, on the one hand, when the load rate is less than a first preset value, charging the electrical equipment through the power grid can reduce the energy loss caused by the discharge of the energy storage device and further improve energy utilization efficiency; on the other hand, when the load rate is less than the first preset value, and the state of charge value of the energy storage device is less than a preset charge threshold, and / or the state of remaining energy value is less than a preset remaining energy threshold, charging the energy storage device through the power grid can make full use of the charging capacity of the power grid and improve energy utilization efficiency.

[0121] In some embodiments, the integrated energy storage and charging system is connected to the DC bus, and the power grid is connected to the DC bus through a low-voltage distribution transformer. The charging control method may further include the following steps S351 to S353, wherein:

[0122] Step S351: Obtain the actual operating data of the access point;

[0123] Here, the actual operating data includes voltage and frequency.

[0124] In some implementations, the integrated energy storage and charging system acquires actual operating data from the access point. This actual operating data typically includes voltage and frequency, which are important indicators for assessing the operating status of the power grid.

[0125] Step S352: If the voltage offset value is greater than the second preset value, reactive power support is provided to the power grid through the low-voltage distribution transformer.

[0126] Here, the second preset value can be a suitable value set based on the voltage offset. Reactive power support can refer to the injection of reactive power from low-voltage distribution transformers into the power grid to adjust the grid's voltage level. In power systems, the flow of reactive power is crucial for maintaining voltage stability.

[0127] In some implementations, voltage deviation is typically caused by reactive power imbalance in the power grid. The integrated energy storage and charging system checks whether the voltage deviation exceeds a second preset value. If the voltage deviation is too large (i.e., exceeds the second preset value), the integrated energy storage and charging system provides reactive power support to the power grid through a low-voltage distribution transformer to stabilize the reactive power imbalance in the power grid.

[0128] Step S353: If the frequency offset value is greater than the third preset value, active power support is provided to the power grid through the low-voltage distribution transformer.

[0129] Here, the third preset value can be a suitable value set based on the voltage offset. Active power support refers to the injection of active power from low-voltage distribution transformers into the power grid to adjust the grid frequency. In a power system, active power is the power that is actually converted and used, and it can participate in the conversion and transmission of electrical energy.

[0130] In some implementations, frequency offset is typically caused by an imbalance in active power in the power grid. The integrated energy storage and charging system checks whether the frequency offset exceeds a third preset value. If the frequency offset is too large (i.e., exceeds the third preset value), the integrated energy storage and charging system provides active power support to the power grid through a low-voltage distribution transformer to stabilize the active power imbalance in the power grid.

[0131] In this embodiment of the disclosure, on the one hand, when the voltage offset exceeds a second preset value, reactive power support is provided to the power grid through a low-voltage distribution transformer, which helps to adjust the voltage level of the power grid and ensure the stable operation of the power grid; on the other hand, when the frequency offset exceeds a third preset value, active power support is provided to the power grid through a low-voltage distribution transformer, which helps to adjust the frequency level of the power grid and ensure the stable operation of the power grid.

[0132] In some embodiments, the charging control method may further include the following steps S361 to S362, wherein:

[0133] Step S361: When the current at the access point is 0, send a power outage event to the owner of the power grid so that the owner of the power grid can choose whether to start the backup power supply.

[0134] Here, when the current at the connection point is 0, the integrated energy storage and charging system determines that a power outage event has occurred. This could be due to grid failure, power line failure, or other reasons. Backup power may come from backup generators, energy storage power stations, transmission from nearby power grids, or other backup power sources.

[0135] In some implementations, when the current at the access point is 0, the charging control device of the integrated energy storage and charging system will send a power outage event to the power grid to inform the power grid owner that the current access point has lost power supply; after receiving the power outage event, the power grid owner will assess the backup power supply resources and decide whether to activate the backup power supply.

[0136] In step S362, in response to the power grid owner's selection to start the backup power supply, power is supplied to the electrical equipment through the low-voltage distribution transformer.

[0137] In some implementations, if the owner of the power grid decides to activate the backup power supply, the backup power supply will supply power to the electrical equipment through a low-voltage distribution transformer.

[0138] In this embodiment of the disclosure, on the one hand, when the current at the access point is 0, a power outage event is sent to the owner of the power grid through the charging control device of the integrated energy storage and charging system, which helps the owner of the power grid to understand and handle the power outage situation in a timely manner; on the other hand, when the owner of the power grid decides to activate the backup power supply, power is supplied to the electrical equipment through the low-voltage distribution transformer, which can reduce the impact of the power outage event on production and life and improve the reliability of the power supply system.

[0139] In some embodiments, when the current at the access point is 0, a power outage event is sent to the cloud platform so that the user can choose whether to continue supplying power to the electrical equipment; in response to the user's choice to continue supplying power to the electrical equipment, power is supplied to the electrical equipment through an energy storage device.

[0140] In some implementations, when the current at the access point is 0, the charging control device of the integrated energy storage and charging system sends a power outage event to the cloud platform to inform it that the current access point has lost power. After receiving the power outage event, the cloud platform may notify the user through a user interface (e.g., a mobile application, a webpage, etc.), at which point the user can choose whether they wish to continue supplying power to the device. If the user chooses to continue supplying power, the integrated energy storage and charging system will utilize its built-in energy storage device (e.g., a battery pack) to provide power to the device.

[0141] In this embodiment of the disclosure, on the one hand, when the current at the access point is 0, a power outage event is sent to the owner of the power grid through the charging control device of the integrated energy storage and charging system, which helps the owner of the power grid to understand and handle the power outage situation in a timely manner; on the other hand, when the owner of the power grid decides to activate the backup power supply, power is supplied to the electrical equipment through the low-voltage distribution transformer, which can reduce the impact of the power outage event on production and life and improve the reliability of the power supply system.

[0142] High-power charging piles in related technologies have high requirements for the power grid, namely, the power grid needs to provide a capacity of greater than or equal to 480kVA; high-power charging piles have a large impact on the power grid when running at full load, namely, short-term load fluctuations are greater than or equal to 480kVA; the energy storage device of the high-power DC-coupled energy storage and charging system (i.e. the above-mentioned integrated energy storage and charging system) has the ability to store energy, but the high-power DC-coupled energy storage and charging system has redundancy in its ability to regulate the power grid, that is, the utilization rate of the regulation capacity is low.

[0143] This disclosure utilizes the flexibility and reverse output capability of a high-power DC-coupled energy storage and charging system, and configures corresponding control functions. These control functions are implemented through the controller of the high-power DC-coupled energy storage and charging system (i.e., the aforementioned charging control device), thereby supporting the power distribution network of the distribution substation area while charging the electrical equipment.

[0144] Here, flexibility can refer to the ability to flexibly adjust the output power and energy flow direction according to the actual needs of the distribution network in the distribution substation area. Reverse output can refer to the ability of the high-power DC-coupled energy storage system to release stored electrical energy into the distribution network when the distribution network in the distribution substation area experiences power shortages or peak loads, thereby alleviating power shortages or reducing the impact of peak loads on the distribution network in the distribution substation area.

[0145] The high-power DC-coupled energy storage and charging system in this embodiment has the following functions: 1. Emergency support for the distribution network; 2. Energy management; 3. Power demand response. The emergency support for the distribution network is mainly achieved by the high-power DC-coupled energy storage and charging system outputting electrical energy back to the grid. Energy management mainly involves the high-power DC-coupled energy storage and charging system providing active and reactive power compensation to the grid, and providing backup power when the power supply line fails or is under maintenance. Power demand response mainly involves adjusting the power purchased from the grid based on the electricity consumption of the area; if the electricity consumption of the area is high, the integrated energy storage and charging system purchases less power from the grid, and vice versa.

[0146] Emergency Support Distribution Network: Addressing short-term heavy overload issues, this system can be configured with distribution network monitoring, bidirectional output from grid connection points, heavy overload level assessment, and output power regulation. The distribution network monitoring function monitors the operational status of the distribution network, such as voltage, current, power, and frequency at various nodes. The bidirectional output from grid connection points enables bidirectional power flow at the connection points where distributed energy sources (e.g., photovoltaic, wind power) connect to the distribution network. For example, excess power can be fed into the grid during periods of ample sunlight or strong winds, while power can be drawn from the grid during cloudy or windless conditions. The heavy overload level assessment function collects real-time data on voltage, current, and power in the distribution network to determine if it is under heavy overload and classifies the degree of overload into different levels. The output power regulation function flexibly adjusts the output power of distributed energy sources based on real-time monitoring of the distribution network's operational status and the output characteristics of the distributed energy sources. Based on the severity of overload, different response methods are adopted for different levels. All the following proportions are examples, and the data can be adjusted according to the actual situation in practical applications. Level 1: When the grid connection point load rate reaches 80% to 90%, the power input of the integrated energy storage and charging system controller is reduced by 10% to 80%. Level 2: When the grid connection point load rate reaches 90% to 95%, the integrated energy storage and charging system controller stops inputting power. Level 3: When the grid connection point load rate reaches 95% to 100%, the integrated energy storage and charging system controller supplies power to the grid, with the power input ranging from 20% to 80% * maximum reverse power. Level 4: When the grid connection point load rate is ≥100%, the integrated energy storage and charging system controller supplies power to the grid at the maximum reverse power.

[0147] Power management addresses issues such as poor power quality and temporary power outages caused by load fluctuations. It involves configuring power factor monitoring, grid frequency monitoring, reactive power support, outage monitoring, and outage backup functions for the distribution network. Reactive power support is provided in tiers based on different power factors; for example, when the power factor of the distribution network is below a set threshold, it indicates a significant reactive power demand in the grid. Reactive power support is optimized for the distribution network based on different power factors. Power output is adjusted using negative feedback based on different grid frequencies; for example, when the grid frequency is above a preset threshold, it indicates excess active power in the grid, and negative feedback is used to reduce the output power of generators or other distributed energy sources. When a grid outage is detected, the integrated energy storage and charging system can automatically start, supplying power to the grid at maximum reverse power, taking over the power supply to the distribution network from the grid's distribution transformers.

[0148] Power Demand Response: This addresses the issue of increasing the demand response capability of the distribution network. It can be configured with communication functions and a demand response calculation module. Based on grid demand and its own operating conditions, it determines power regulation.

[0149] The embodiments disclosed herein can optimize the vehicle-to-grid (V2G) functional mode. For example, electric vehicles can charge and store excess energy when grid load is low and electricity prices are low; while when grid load is high and electricity prices are high, the vehicles can discharge energy back to the grid to achieve energy feedback.

[0150] This disclosure enables distributed photovoltaic (PV) energy consumption, which refers to the process of effectively utilizing and consuming the electrical energy generated by a distributed PV power generation system. A distributed PV power generation system is a PV system installed at or near a user's site. It uses PV modules to convert solar energy into electrical energy, and then uses an inverter to convert direct current (DC) into alternating current (AC), ultimately connecting to the power grid for supply or for self-consumption.

[0151] Compared with the prior art, the embodiments disclosed herein have the following advantages:

[0152] 1. The integrated storage and charging system in this embodiment can reduce the burden on the distribution radio station area.

[0153] 2. The embodiments disclosed herein solve the problems of insufficient capacity and poor power quality in power distribution areas during peak electricity consumption periods.

[0154] 3. The embodiments disclosed herein add demand response capability to ordinary distribution radio areas.

[0155] 4. The embodiments disclosed herein increase the flexibility of ordinary distribution stations and the absorption capacity of distributed new energy sources.

[0156] Based on the foregoing embodiments, this disclosure provides a schematic diagram of the composition structure of a charging control device. The device includes various modules and units included in each module, which can be implemented by a processor in a computer device; of course, it can also be implemented by specific logic circuits. In the implementation process, the processor can be a central processing unit (CPU), a microprocessor unit (MPU), a digital signal processor (DSP), or a field programmable gate array (FPGA), etc.

[0157] This disclosure provides a charging control device applied to an integrated energy storage and charging system, which includes an energy storage device and a charging device. One end of the energy storage device is connected to the power grid via a DC bus; the other end of the energy storage device is connected to the charging device. The energy storage device is used to charge the battery of an electrical device via the charging device, or to output electrical energy from the energy storage device to the DC bus. One end of the charging device is connected to a charging gun, and the other end is connected to the DC bus. The charging device is used to transmit electrical energy from the electrical device to the energy storage device and / or the power grid, or to transmit electrical energy from the power grid and / or the energy storage device to the electrical device. As shown in FIG4, the charging control device 400 includes:

[0158] The first determining module 410 is used to determine the load rate of the access point of the integrated energy storage and charging system to the power grid;

[0159] The second determining module 420 is used to determine the working mode of the integrated energy storage and charging system and the power consumption object corresponding to the working mode based on the load rate of the access point; wherein, the working mode includes a power supply mode and a charging mode; the power supply mode includes transmitting the electrical energy in the power consumption device to the energy storage device and / or the power grid, and transmitting the electrical energy of the energy storage device to the power grid and / or the power consumption device; the charging mode includes transmitting the electrical energy of the power grid to the energy storage device and / or the power consumption device.

[0160] The third determining module 430 is used to determine the working parameters corresponding to the working mode of the integrated energy storage and charging system based on the power user; wherein the power user includes at least one of the following: energy storage device, power grid, and power-consuming equipment;

[0161] The control module 440 is used to control the integrated storage and charging system to operate according to the working parameters.

[0162] In some embodiments, the second determining module 420 includes: a first determining unit, configured to determine the estimated charging period of the power device in response to a charging event of the power device; a second determining unit, configured to determine the load rate of the access point during the estimated charging period based on the estimated charging period; and a third determining unit, configured to determine the working mode of the integrated storage and charging system and the power user corresponding to the working mode based on the load rate of the access point during the estimated charging period.

[0163] In some embodiments, the second determining unit includes: a first determining subunit, configured to determine the load rate of the access point in the first time period as a first load rate when the grid power supply is connected during the estimated charging time period; and a second determining subunit, configured to determine the load rate of the access point in the second time period as a second load rate when the grid power supply is connected during the estimated charging time period; wherein the first time period and the second time period are different.

[0164] In some embodiments, the third determining unit includes: a third determining subunit, configured to determine whether the load rate of the access point during the estimated charging period is greater than or equal to a first preset value; a fourth determining subunit, configured to determine, when the load rate is greater than or equal to the first preset value, that the operating mode of the integrated energy storage and charging system is a power supply mode and the power consumption object corresponding to the power supply mode; the power supply mode includes supplying power to the power consumption device through the energy storage device, and the power consumption object is the power consumption device; a fifth determining subunit, configured to determine, when the load rate is less than the first preset value, that the operating mode of the integrated energy storage and charging system is a charging mode and the power consumption object corresponding to the charging mode; the charging mode includes charging the power consumption device through the power grid, and the power consumption object is the power consumption device.

[0165] In some embodiments, the fourth determining subunit is further configured to, when the load rate is greater than or equal to a first preset value, obtain the current state of charge value and / or the remaining energy state value of the energy storage device; determine whether the energy storage device can supply power to the grid based on the state of charge value and / or the remaining energy state value; and, when it is determined that the energy storage device can supply power to the grid, determine the power supply mode as supplying power to the grid through the energy storage device, and determine the power user as the grid.

[0166] In some embodiments, the fourth determining subunit is further configured to determine, when it is determined that the energy storage device cannot supply power to the grid, the power supply mode is to supply power to the electrical equipment through the energy storage device, and to determine that the power user is the electrical equipment.

[0167] In some embodiments, the fifth determining subunit is further configured to determine the charging mode as including charging the electrical device through the power grid when the load rate is less than a first preset value, wherein the electrical device is the power user; or, when the load rate is less than the first preset value, and the state of charge value of the energy storage device is less than a preset charge threshold, and / or the state of remaining energy value is less than a preset remaining energy threshold, the charging mode is determined to include charging the electrical device through the power grid and charging the energy storage device through the power grid, wherein the electrical device corresponds to the electrical device and the energy storage device.

[0168] In some embodiments, the integrated energy storage and charging system is connected to the DC bus, and the power grid is connected to the DC bus through a low-voltage distribution transformer. The charging control device 400 further includes: an acquisition module for acquiring actual operating data of the connection point; the actual operating data includes voltage and frequency; a first providing module for providing reactive power support to the power grid through the low-voltage distribution transformer when the voltage offset value is greater than a second preset value; and a second providing module for providing active power support to the power grid through the low-voltage distribution transformer when the frequency offset value is greater than a third preset value.

[0169] In some embodiments, the charging control device 400 further includes: a first transmitting module, configured to send a power outage event to the owner of the power grid when the current at the access point is 0, so that the owner of the power grid can choose whether to start the backup power supply; and a first power supply module, configured to supply power to the electrical equipment through a low-voltage distribution transformer in response to the owner of the power grid choosing to start the backup power supply.

[0170] The descriptions of the apparatus embodiments above are similar to those of the method embodiments above, and have similar beneficial effects. In some embodiments, the functions or modules included in the apparatus provided in this disclosure can be used to perform the methods described in the method embodiments above. For technical details not disclosed in the apparatus embodiments of this disclosure, please refer to the descriptions of the method embodiments of this disclosure for understanding.

[0171] It should be noted that, in the embodiments of this disclosure, if the above methods are implemented as software functional modules and sold or used as independent products, they can also be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the embodiments of this disclosure, or the parts that contribute to related technologies, can be embodied in the form of a software product. This software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the methods of the various embodiments of this disclosure. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), magnetic disks, or optical disks. Thus, the embodiments of this disclosure are not limited to any specific hardware, software, or firmware, or any combination of hardware, software, and firmware.

[0172] This disclosure provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements some or all of the steps in the above-described method. The computer-readable storage medium can be transient or non-transient.

[0173] This disclosure provides a computer program including computer-readable code. When the computer-readable code is executed in a computer device, a processor in the computer device performs some or all of the steps in the above-described method.

[0174] This disclosure provides a computer program product, including a computer program or instructions, which, when executed by a processor, implement the steps in the above-described method.

[0175] The computer program product can be implemented in hardware, software, or a combination thereof. In some embodiments, the computer program product is specifically embodied in a computer storage medium; in other embodiments, the computer program product is specifically embodied in a software product, such as a software development kit (SDK), etc.

[0176] It should be noted that the descriptions of the various embodiments above tend to emphasize the differences between them, while their similarities or commonalities can be referenced interchangeably. The descriptions of the above embodiments of the device, storage medium, computer program, and computer program product are similar to the descriptions of the above method embodiments and have similar beneficial effects. For technical details not disclosed in the embodiments of the device, storage medium, computer program, and computer program product of this disclosure, please refer to the descriptions of the method embodiments of this disclosure for understanding.

[0177] It should be understood that the phrase "an embodiment" or "one embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this disclosure. Therefore, "in one embodiment" or "one embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It should be understood that in the various embodiments of this disclosure, the sequence numbers of the above steps / processes do not imply a sequential order of execution; the execution order of each step / process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this disclosure. The sequence numbers of the above embodiments of this disclosure are merely descriptive and do not represent the superiority or inferiority of the embodiments.

[0178] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0179] In the several embodiments provided in this disclosure, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods, such as: multiple units or components may be combined, or integrated into another system, or some features may be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the various components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0180] The units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; they may be located in one place or distributed across multiple network units; some or all of the units may be selected to achieve the purpose of this embodiment according to actual needs. Furthermore, the functional units in the embodiments of this disclosure may all be integrated into one processing unit, or each unit may be a separate unit, or two or more units may be integrated into one unit; the integrated unit may be implemented in hardware or in a combination of hardware and software functional units.

[0181] The above are merely embodiments of this disclosure, but the scope of protection of this disclosure 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 disclosure should be included within the scope of protection of this disclosure.

Claims

1. A charging control method applied to an integrated energy storage and charging system, the integrated energy storage and charging system comprising an energy storage device and a charging device; wherein, One end of the energy storage device is connected to the power grid via a DC bus; the other end of the energy storage device is connected to the charging device; the energy storage device is used to charge the battery of the electrical equipment through the charging device, or to output the electrical energy in the energy storage device to the DC bus. One end of the charging device is connected to the charging gun, and the other end is connected to the DC bus. The charging device is used to transmit electrical energy from the electrical equipment to the energy storage device and / or the power grid, or to transmit electrical energy from the power grid and / or the energy storage device to the electrical equipment. The charging control method includes: Determine the load rate of the connection point of the integrated energy storage and charging system to the power grid; Based on the load rate of the access point, the working mode of the integrated energy storage and charging system and the corresponding power consumption object are determined; wherein, the working mode includes a power supply mode and a charging mode; the power supply mode includes transmitting electrical energy from the power consumption device to the energy storage device and / or the power grid, and transmitting electrical energy from the energy storage device to the power grid and / or the power consumption device; the charging mode includes transmitting electrical energy from the power grid to the energy storage device and / or the power consumption device. Based on the power user, the operating parameters corresponding to the operating mode of the integrated energy storage and charging system are determined; wherein, the power user includes at least one of the energy storage device, the power grid, and the power-consuming equipment; The integrated storage and charging system is controlled to operate according to the specified operating parameters.

2. The charging control method according to claim 1, wherein, Based on the load rate of the access point, the operating mode of the integrated energy storage and charging system and the corresponding power users are determined, including: In response to a charging event of the electrical device, determine the estimated charging period of the electrical device; Based on the estimated charging period, the load rate of the access point during the estimated charging period is determined; Based on the load rate of the access point during the estimated charging period, the working mode of the integrated energy storage and charging system and the corresponding power users are determined.

3. The charging control method according to claim 2, wherein, Based on the estimated charging period, determining the load rate of the access point during the estimated charging period includes: If the estimated charging time period falls within the first time period when the grid power supply is supplied, the load rate of the access point during the first time period is determined as the first load rate. If the estimated charging time period falls within the second time period when the grid power supply is supplied, the load rate of the access point during the second time period is determined as the second load rate; The first time period and the second time period are different.

4. The charging control method according to claim 2 or 3, wherein, Based on the load rate of the access point during the estimated charging period, the operating mode of the integrated energy storage and charging system and the corresponding power users are determined, including: Determine whether the load rate of the access point during the estimated charging period is greater than or equal to a first preset value; When the load rate is greater than or equal to the first preset value, the working mode of the integrated energy storage and charging system is determined to be the power supply mode and the corresponding power consumption object; the power supply mode includes supplying power to the power consumption device through the energy storage device, and the power consumption object is the power consumption device; When the load rate is less than the first preset value, the working mode of the integrated storage and charging system is determined to be the charging mode and the corresponding power user; the charging mode includes charging the power user through the power grid, and the power user is the power user.

5. The charging control method according to claim 4, wherein, When the load rate is greater than or equal to the first preset value, the operating mode of the integrated storage and charging system is determined to be the power supply mode and the corresponding power user of the power supply mode, including: When the load rate is greater than or equal to a first preset value, the current state of charge and / or remaining energy state value of the energy storage device are obtained; Based on the state of charge value and / or the remaining energy state value, it is determined whether the energy storage device can supply power to the power grid; If it is determined that the energy storage device is capable of supplying power to the power grid, the power supply mode is determined to be supplying power to the power grid through the energy storage device, and the power user is determined to be the power grid.

6. The charging control method according to any one of claims 1 to 5, wherein, The method further includes: If it is determined that the energy storage device cannot supply power to the power grid, the power supply mode is determined to be supplying power to the electrical equipment through the energy storage device, and the electrical equipment is determined to be the object of power consumption.

7. The charging control method according to claim 4 or 5, wherein, When the load rate is less than the first preset value, the operating mode of the integrated storage and charging system is determined to be the charging mode and the corresponding power user of the charging mode, including: When the load rate is less than the first preset value, the charging mode is determined to include charging the electrical equipment through the power grid, where the electrical equipment is the user. Alternatively, if the load rate is less than the first preset value, and the state of charge value of the energy storage device is less than a preset charge threshold, and / or the state of remaining energy value is less than a preset remaining energy threshold, the charging mode is determined to include charging the electrical equipment through the power grid and charging the energy storage device through the power grid, wherein the electrical user corresponds to the electrical equipment and the energy storage device.

8. The charging control method according to any one of claims 1 to 7, wherein, The integrated energy storage and charging system is connected to a DC bus, and the power grid is connected to the DC bus via a low-voltage distribution transformer. The method further includes: Obtain the actual operating data of the access point; the actual operating data includes voltage and frequency. If the voltage offset is greater than the second preset value, reactive power support is provided to the power grid through a low-voltage distribution transformer; When the frequency offset is greater than a third preset value, active power support is provided to the power grid through the low-voltage distribution transformer.

9. The charging control method according to claim 8, wherein, The method further includes: When the current at the access point is 0, a power outage event is sent to the owner of the power grid so that the owner of the power grid can choose whether to start the backup power supply. In response to the power grid owner's selection to activate the backup power supply, power is supplied to the electrical equipment through the low-voltage distribution transformer.

10. A charging control device applied to an integrated energy storage and charging system, the integrated energy storage and charging system comprising an energy storage device and a charging device; wherein, One end of the energy storage device is connected to the power grid via a DC bus; the other end of the energy storage device is connected to the charging device; the energy storage device is used to charge the battery of the electrical equipment through the charging device, or to output the electrical energy in the energy storage device to the DC bus. One end of the charging device is connected to the charging gun, and the other end is connected to the DC bus. The charging device is used to transmit electrical energy from the electrical equipment to the energy storage device and / or the power grid, or to transmit electrical energy from the power grid and / or the energy storage device to the electrical equipment. The charging control device includes: The first determining module is used to determine the load rate of the access point of the integrated energy storage and charging system to the power grid; The second determining module is used to determine the working mode of the integrated energy storage and charging system and the corresponding power user based on the load rate of the access point; wherein, the working mode includes a power supply mode and a charging mode; the power supply mode includes transmitting electrical energy from the power user to the energy storage device and / or the power grid, and transmitting electrical energy from the energy storage device to the power grid and / or the power user; the charging mode includes transmitting electrical energy from the power grid to the energy storage device and / or the power user. The third determining module is used to determine the operating parameters corresponding to the operating mode of the integrated energy storage and charging system based on the power user; wherein the power user includes at least one of the energy storage device, the power grid, and the power-consuming equipment; The control module is used to control the integrated storage and charging system to operate according to the operating parameters.

11. An integrated energy storage and charging system, the integrated energy storage and charging system comprising a charging device, an energy storage device, and a charging control device; One end of the energy storage device is connected to the power grid via a DC bus; the other end of the energy storage device is connected to the charging device; the energy storage device is used to charge the battery of the electrical equipment through the charging device, or to output the electrical energy in the energy storage device to the DC bus. One end of the charging device is connected to the charging gun, and the other end is connected to the DC bus. The charging device is used to transmit electrical energy from the electrical equipment to the energy storage device and / or the power grid, or to transmit electrical energy from the power grid and / or the energy storage device to the electrical equipment; wherein... The charging control device is used to determine the load rate of the access point of the integrated energy storage and charging system connected to the power grid; based on the load rate of the access point, determine the operating mode of the integrated energy storage and charging system and the corresponding power user of the operating mode; wherein, the operating mode includes a power supply mode and a charging mode; the power supply mode includes transmitting electrical energy from the power user to the energy storage device and / or the power grid, and transmitting electrical energy from the energy storage device to the power grid and / or the power user; the charging mode includes transmitting electrical energy from the power grid to the energy storage device and / or the power user; based on the power user, determine the operating parameters corresponding to the operating mode of the integrated energy storage and charging system; wherein, the power user includes at least one of the energy storage device, the power grid, and the power user; and control the integrated energy storage and charging system to operate with the operating parameters.

12. A computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method according to any one of claims 1 to 9.

13. A computer program product comprising a computer program or instructions which, when executed by a processor, implement the steps of the method according to any one of claims 1 to 9.

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