A charging control method and system, electronic device, and storage medium

Abstract

The application discloses a charging control method and system, an electronic device and a storage medium. The method is applied to a control unit in a charging system, the charging system further comprises a photovoltaic unit, an energy storage unit and a charging and swapping unit, and the photovoltaic unit, the energy storage unit and the charging and swapping unit are connected in sequence. The control unit is in communication connection with the photovoltaic unit, the energy storage unit and the charging and swapping unit through a communication bus. The method comprises the following steps: obtaining an operating parameter of the photovoltaic unit; if it is determined that the photovoltaic unit is in a normal working state based on the operating parameter, controlling the photovoltaic unit to supply power to the energy storage unit through the charging and swapping unit. The technical scheme provided by the application combines the photovoltaic unit with the traditional energy storage unit, increases green and low-carbon renewable energy, controls the photovoltaic unit to supply power to the energy storage unit, reduces the cost, improves the utilization proportion of green and low-carbon energy, and realizes the purpose of reducing carbon in the energy storage system while guaranteeing power supply.

Description

Technical Field

[0001] This application belongs to the field of new energy technology, and in particular relates to a charging control method, system, electronic device and storage medium. Background Technology

[0002] In the field of new energy technology, the charging of new energy vehicles mainly relies on the power supply of the public power grid and the energy storage batteries in local charging stations. However, the power grid is still mainly based on fossil energy, making it difficult to reduce carbon emissions to zero throughout the entire life cycle, and the cost is relatively high.

[0003] Therefore, it is necessary to provide a charging control method to solve the problems existing in the prior art. Summary of the Invention

[0004] The embodiments of this application provide a charging control method that solves the problems of difficulty in achieving zero carbon emissions throughout the entire life cycle and high costs in traditional charging systems.

[0005] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.

[0006] According to a first aspect of the embodiments of this application, a charging control method is provided, applied to a control unit in a charging system. The charging system further includes a photovoltaic unit, an energy storage unit, and a charging / swapping unit, which are connected sequentially. The control unit is communicatively connected to the photovoltaic unit, the energy storage unit, and the charging / swapping unit via a communication bus. The energy storage unit includes a battery energy storage unit, a charging / swapping energy storage unit, and a bidirectional converter. The battery energy storage unit and the charging / swapping energy storage unit are connected to the charging / swapping unit via the bidirectional converter. The method includes: Obtain the operating status of the photovoltaic unit, including normal operating status and abnormal operating status; If the photovoltaic unit is in normal working condition, control the photovoltaic unit to supply power to the energy storage unit through the charging and swapping unit; If the photovoltaic unit is in an abnormal operating state, the battery energy storage unit is controlled to supply power to the charging and swapping energy storage unit based on the first energy storage capacity of the battery energy storage unit and the second energy storage capacity of the charging and swapping energy storage unit.

[0007] In some embodiments of this application, based on the foregoing scheme, the method further includes: The energy storage capacity of the energy storage unit and the operating status of the charging and swapping unit are obtained. The operating status includes: on-load status and off-load status. If the energy storage capacity is greater than the first preset capacity, the photovoltaic unit is in normal working condition, and the charging and swapping unit is in no-load condition, then the photovoltaic unit is controlled to stop working.

[0008] In some embodiments of this application, based on the foregoing scheme, the working state of the charging and swapping unit also includes the state of swapping batteries for the electric vehicle; The method also includes: If the charging and swapping unit is in the electric vehicle battery swapping state, the control unit will allocate fully charged swapping batteries to the charging and swapping unit.

[0009] In some embodiments of this application, based on the foregoing scheme, and based on the first energy storage capacity of the battery energy storage unit and the second energy storage capacity of the charging / swapping energy storage unit, controlling the battery energy storage unit to supply power to the charging / swapping energy storage unit includes: If the first energy storage capacity is not greater than the second preset capacity and the second energy storage capacity is greater than the third preset capacity, the battery energy storage unit is controlled to supply power to the charging and swapping energy storage unit.

[0010] In some embodiments of this application, based on the foregoing scheme, the method further includes: If the first energy storage capacity is greater than the second preset capacity and the charging and swapping unit is in a loaded state, control the battery energy storage unit to supply power to the load. If the first energy storage capacity is not greater than the second preset capacity, the charging and swapping unit is in a loaded state, and the second energy storage capacity is greater than the third preset capacity, then the charging and swapping energy storage unit is controlled to supply power to the load.

[0011] In some embodiments of this application, based on the aforementioned scheme, the system further includes a microgrid, and the photovoltaic unit is connected to the microgrid in sequence through a charging and swapping unit and a three-phase inverter; If the photovoltaic unit is in normal working condition and the charging and swapping unit is in no-load condition, the photovoltaic unit is controlled to supply power to the micro-energy storage unit in the microgrid.

[0012] In some embodiments of this application, based on the aforementioned scheme, the system further includes a public power grid, and the photovoltaic unit is connected to the public power grid in sequence through a charging and swapping unit, a three-phase inverter, a microgrid, and a three-phase transformer; If the photovoltaic unit is in normal working condition and the charging and swapping unit is in no-load condition, control the photovoltaic unit to supply power to the public energy storage unit in the public power grid.

[0013] According to a second aspect of the embodiments of this application, a charging system is provided, which further includes a photovoltaic unit, an energy storage unit, a control unit, and a charging / swapping unit, wherein the photovoltaic unit, the energy storage unit, and the charging / swapping unit are connected in sequence; the control unit is communicatively connected to the photovoltaic unit, the energy storage unit, and the charging / swapping unit respectively via a communication bus; the energy storage unit includes a battery energy storage unit, a charging / swapping energy storage unit, and a bidirectional converter, wherein the battery energy storage unit and the charging / swapping energy storage unit are respectively connected to the charging / swapping unit via the bidirectional converter; The control unit is used to: acquire the operating status of the photovoltaic unit, including normal operating status and abnormal operating status; if the photovoltaic unit is in normal operating status, control the photovoltaic unit to supply power to the energy storage unit through the charging and swapping unit; if the photovoltaic unit is in abnormal operating status, control the battery energy storage unit to supply power to the charging and swapping energy storage unit based on the first energy storage capacity of the battery energy storage unit and the second energy storage capacity of the charging and swapping energy storage unit.

[0014] According to a third aspect of the embodiments of this application, a computer-readable storage medium is provided, which stores computer program instructions that, when loaded and executed by a processor, implement the steps of the control method as described in any of the second aspects.

[0015] According to a fourth aspect of the embodiments of this application, an electronic device is provided, including a processor and a memory, wherein the memory stores computer program instructions that can be executed by the processor, and when the processor executes the computer program instructions, it implements the steps of the control method as described in any of the second aspects.

[0016] According to a fifth aspect of the embodiments of this application, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps of a vehicle control method as described in any of the first aspects.

[0017] In this application, a charging control method is applied to a control unit in a charging system. The charging system also includes a photovoltaic unit, an energy storage unit, and a charging / swapping unit, which are connected sequentially. The control unit communicates with the photovoltaic unit, energy storage unit, and charging / swapping unit via a communication bus. The energy storage unit includes a battery energy storage unit, a charging / swapping energy storage unit, and a bidirectional converter. The battery energy storage unit and the charging / swapping energy storage unit are connected to the charging / swapping unit via the bidirectional converter. The operating status of the photovoltaic unit is acquired, including normal and abnormal operating states. If the photovoltaic unit is in a normal operating state, the control unit supplies power to the energy storage unit through the charging / swapping unit. If the photovoltaic unit is in an abnormal operating state, the control unit supplies power to the charging / swapping energy storage unit based on the first energy storage capacity of the battery energy storage unit and the second energy storage capacity of the charging / swapping energy storage unit. The technical solution provided in this application combines photovoltaics with traditional energy storage units, increasing the availability of green, low-carbon renewable energy systems. A solar photovoltaic energy storage system, under normal operating conditions, controls the photovoltaic units to supply power to the energy storage units. This not only reduces costs but also increases the utilization rate of green and low-carbon energy, achieving the goal of carbon reduction in energy storage systems while ensuring power supply. Furthermore, when the photovoltaic units are not operating normally, the system can combine the energy storage capacity of the battery energy storage unit and the energy storage capacity of the charging and swapping energy storage unit to control the battery energy storage unit to supply power to the charging and swapping energy storage unit, ensuring the normal power supply of the charging and swapping energy storage unit.

[0018] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings: Figure 1 A schematic diagram of the structure of the first charging system in an embodiment of this application is shown; Figure 2 A flowchart illustrating the first charging control method in an embodiment of this application is shown; Figure 3 A flowchart illustrating the second charging control method in an embodiment of this application is shown; Figure 4 A schematic diagram of the structure of an electronic device according to an embodiment of this application is shown. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0022] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0023] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0024] In the field of new energy technology, charging of new energy vehicles mainly relies on power supply from the public power grid and energy storage batteries in local charging stations. However, grid electricity is still primarily based on fossil fuels, making it difficult to achieve zero carbon emissions throughout the entire life cycle, and the cost is relatively high. To address this technical problem, a charging control method is proposed below.

[0025] This application provides a charging control method, primarily applied to the control unit of a charging system. Therefore, for a better understanding of the charging control process in this solution, please refer to... Figure 1 The diagram shows a schematic representation of a charging system according to an embodiment of this application. Its main application scenario is a charging station, but it can also be used in other charging / swapping scenarios. Detailed descriptions are as follows: The charging system also includes a photovoltaic unit 01, an energy storage unit 02, and a charging / swapping unit 03, which are connected in sequence. The control unit 04 communicates with the photovoltaic unit 01, the energy storage unit 02, and the charging / swapping unit 03 via a communication bus.

[0026] The energy storage unit 02 includes a battery energy storage unit 021, a charging and swapping energy storage unit 022, and a bidirectional converter 023. The battery energy storage unit 021 and the charging and swapping energy storage unit 022 are respectively connected to the charging and swapping unit 03 through the bidirectional converter 023.

[0027] In some embodiments, a photovoltaic unit refers to a photovoltaic power generation device. The operating state of a photovoltaic unit includes a normal operating state and an abnormal operating state (i.e., it can generate electricity). A photovoltaic unit in a normal operating state means that photovoltaic power generation is normal, and a photovoltaic unit in an abnormal operating state means that the photovoltaic unit cannot generate electricity. Specifically, it may include: photovoltaic unit failure, or photovoltaic unit being unable to generate electricity at night or on rainy days.

[0028] The charging and swapping unit is a device used to connect various units. It is equipped with multiple charging interfaces and / or multiple swapping interfaces. The working state of the charging and swapping unit includes a loaded state and an unloaded state. The unloaded state means that no charging gun is inserted into the charging interface of the charging and swapping unit (no electric vehicle is charging) or the swapping interface is not activated (no vehicle is swapping batteries). The loaded state means that a charging gun is inserted into the charging interface of the charging and swapping unit (electric vehicle is charging).

[0029] Among them, the bidirectional converter refers to the bidirectional DC-DC converter (Direct Current-Direct Current, abbreviated as DC-DC), whose main function is to convert electrical energy from the low-voltage side to the high-voltage side, or from the high-voltage side to the low-voltage side.

[0030] Specifically, the actual energy storage unit includes multiple battery energy storage units and multiple charging and swapping energy storage units. Each battery energy storage unit is connected to a bidirectional DC-DC converter, and each charging and swapping energy storage unit is connected to a bidirectional DC-DC converter, thereby achieving connection with the charging and swapping unit 03.

[0031] Specifically, each battery energy storage unit has at least one energy storage battery, the specific type of which can be set according to the actual situation.

[0032] Each charging and swapping energy storage unit has at least one swapping battery, which is intended for installation in a vehicle.

[0033] In this embodiment, the photovoltaic unit 01 includes a photovoltaic power generation unit 011 and a boost converter 012. The photovoltaic power generation unit 011 is connected to the energy storage unit 02 in sequence through a boost transformer 011 and a charging and swapping unit 03.

[0034] Among them, the boost converter refers to the DC-DC converter, whose main function is to boost voltage.

[0035] Specifically, in the actual photovoltaic unit 01, there are multiple photovoltaic power generation units 011, and each photovoltaic power generation unit 011 is connected to a DC-DC converter, thereby realizing the connection with the charging and swapping unit 01.

[0036] In one exemplary embodiment, refer to Figure 2 The diagram shows a flowchart of a charging control method according to an embodiment of this application. It is mainly applied to the control unit in a charging system, and the method includes the following steps S101-S103: S101, obtain the operating status of the photovoltaic unit.

[0037] S102, if the photovoltaic unit is in normal working condition, control the photovoltaic unit to supply power to the energy storage unit through the charging and swapping unit.

[0038] S103, if the photovoltaic unit is in an abnormal working state, based on the first energy storage capacity of the battery energy storage unit and the second energy storage capacity of the charging and swapping energy storage unit, control the battery energy storage unit to supply power to the charging and swapping energy storage unit.

[0039] In some embodiments, in actual charging stations, various factors can cause unexpected situations to occur in photovoltaic units, such as malfunctions or weather conditions. Therefore, in order to ensure that the photovoltaic units can work normally, it is necessary to determine the operating status of the photovoltaic units. Therefore, for the above step S101, obtaining the operating status of the photovoltaic units includes the following methods: The first method: The output power of the photovoltaic unit is obtained. If the output power is greater than the normal power, the photovoltaic unit is determined to be in normal working condition; if the output power is not greater than the normal power, the photovoltaic unit is determined to be in abnormal working condition.

[0040] The second method: The solar irradiance of the area where the photovoltaic unit is located is obtained. If the solar irradiance is greater than a first threshold, the photovoltaic unit is determined to be in normal working condition. If the solar irradiance is not greater than the first threshold, the photovoltaic unit is determined to be in abnormal working condition.

[0041] The third method: The system obtains the current operating time. If the operating time falls within the nighttime range, the photovoltaic unit is determined to be in an abnormal operating state. If the operating time falls within the daytime range, the photovoltaic unit is determined to be in a normal operating state. The nighttime and daytime ranges can be set according to actual conditions.

[0042] Following step S101, the power supply and control of the energy storage unit can be achieved based on the operating status of the photovoltaic unit. Specifically, when the photovoltaic unit is operating normally, the photovoltaic unit can be controlled to supply power to the energy storage unit, which not only reduces costs but also increases the utilization rate of green and low-carbon energy, achieving the goal of carbon reduction in the energy storage system while ensuring power supply. When the photovoltaic unit is not operating normally, the battery energy storage unit can be controlled to supply power to the charging and swapping energy storage unit by combining the energy storage capacity of the battery energy storage unit and the energy storage capacity of the charging and swapping energy storage unit, ensuring the normal power supply of the charging and swapping energy storage unit.

[0043] In some embodiments, regarding step S103 above, when the photovoltaic unit is in an abnormal working state, based on the first energy storage capacity of the battery energy storage unit and the second energy storage capacity of the charging and swapping energy storage unit, controlling the battery energy storage unit to supply power to the charging and swapping energy storage unit includes: if the first energy storage capacity is greater than the second preset capacity and the second energy storage capacity is not greater than the third preset capacity, controlling the battery energy storage unit to supply power to the charging and swapping energy storage unit.

[0044] Specifically, if the first energy storage capacity is greater than the second preset capacity, it means that the energy storage capacity in the battery energy storage unit is sufficient to support the external transmission of power. If the second energy storage capacity is not greater than the third preset capacity, it means that the energy storage capacity in the charging and swapping energy storage unit is insufficient and cannot support the external transmission of power. Therefore, in this scenario, the battery energy storage unit can be controlled to supply power to the charging and swapping energy storage unit.

[0045] In practical applications (charging stations), to ensure the basic functions of the charging station, namely charging or swapping batteries for electric vehicles, further restrictions are needed when controlling the battery energy storage unit to supply power to the charging / swapping energy storage unit (the photovoltaic unit is in an abnormal operating state). Specifically: First scenario: If the first energy storage capacity is greater than the second preset capacity and the second energy storage capacity is not greater than the third preset capacity, and the charging and swapping unit is in a loaded state, the power supply to the charging and swapping energy storage unit through the battery energy storage unit can be suspended. If the charging and swapping unit is in a no-load state, the battery energy storage unit is controlled to supply power to the charging and swapping energy storage unit.

[0046] The second scenario: If the first energy storage capacity is greater than the second preset capacity and the second energy storage capacity is not greater than the third preset capacity, and the working state of the charging and swapping unit is no load, the battery energy storage unit is controlled to supply power to the charging and swapping energy storage unit. If the charging / swapping unit is in a loaded state and the number of loads is greater than the first number, the power supply to the charging / swapping energy storage unit through the battery energy storage unit can be suspended. If the number of loads is not greater than the first number, the battery energy storage unit is controlled to supply power to the charging / swapping energy storage unit.

[0047] In some embodiments, when an electric vehicle is charging at the charging station, i.e., when the charging and swapping unit is in a loaded state, in order to ensure that sufficient power is provided to the load, corresponding control is required for the battery energy storage unit and the charging and swapping energy storage unit. Therefore, the specific control process is as follows: If the first energy storage capacity is greater than the second preset capacity, the second energy storage capacity is not greater than the third preset capacity, and the charging and swapping unit is in a loaded state, the battery energy storage unit is controlled to supply power to the load.

[0048] Specifically, if the first energy storage capacity is greater than the second preset capacity, it indicates that the battery energy storage unit has sufficient energy to support the output power. Conversely, if the second energy storage capacity is less than the third preset capacity, it indicates that the charging / swapping energy storage unit has insufficient energy to support the output power. Therefore, when a load needs charging, only the battery energy storage unit needs to be activated to supply power to the load. This control method ensures that the load receives sufficient power.

[0049] If the first energy storage capacity is not greater than the second preset capacity, the charging and swapping unit is in a loaded state, and the second energy storage capacity is greater than the third preset capacity, then the charging and swapping energy storage unit is controlled to supply power to the load.

[0050] Specifically, if the first energy storage capacity is not greater than the second preset capacity, it indicates that the battery energy storage unit's energy storage capacity is insufficient to support the output power. Conversely, if the second energy storage capacity is greater than the third preset capacity, it indicates that the charging / swapping energy storage unit's energy storage capacity is sufficient to support the output power. Therefore, when a load needs charging, only the charging / swapping energy storage unit needs to be activated to supply power to the load. This control method ensures that the load receives a sufficient power supply.

[0051] In some embodiments, in actual charging stations, when both the battery energy storage unit and the charging / swapping energy storage unit are fully charged, the photovoltaic unit needs to be shut down to conserve resources. Therefore, in combination with... Figure 3 As shown, the method also includes S201-S202: S201, obtain the energy storage capacity of the energy storage unit and the working status of the charging and swapping unit.

[0052] S202, if the energy storage capacity is greater than the first preset capacity, the photovoltaic unit is in normal working condition and the charging and swapping unit is in no-load state, then control the photovoltaic unit to stop working.

[0053] Specifically, in this embodiment, if the energy storage capacity is greater than a first preset capacity, it indicates that the energy storage capacity in the energy storage unit (battery energy storage unit and charging / swapping energy storage unit) is close to full charge, and there is no need to continue supplying power to the energy storage unit. Since the charging / swapping unit is in a no-load state, it means that no load (electric vehicle) is consuming the energy in the energy storage unit, so the photovoltaic unit does not need to continue supplying power to the energy storage. Therefore, when the photovoltaic unit is in normal working condition, it is necessary to control the photovoltaic unit to stop working. This control method not only saves resources but also avoids damage to components caused by prolonged operation of the photovoltaic unit.

[0054] In this embodiment, the operating state of the charging and swapping unit also includes a battery swapping state for the trolleybus. The trolleybus battery swapping state indicates that the charging and swapping unit is currently swapping the battery for the trolleybus.

[0055] Specifically, after acquiring the operating status of the charging and swapping unit, if the unit is in electric vehicle battery swapping mode, the system controls the charging and swapping energy storage unit to allocate fully charged swapping batteries to the unit. For example, if the charging and swapping energy storage unit has ten swapping batteries, and it is in electric vehicle battery swapping mode, the system controls the charging and swapping energy storage unit to allocate any one of the ten fully charged batteries to the charging and swapping unit, enabling the unit to swap batteries for electric vehicles. This control method ensures that fully charged swapping batteries are available to users, improving the user experience and guaranteeing the utilization rate of the swapping batteries.

[0056] In some embodiments, continue to combine Figure 1 As shown, the system also includes a microgrid 06, and the photovoltaic unit 01 is connected to the microgrid 06 in sequence through the charging and swapping unit 03 and the three-phase inverter 05.

[0057] Specifically, if the photovoltaic unit is in normal operating condition and the charging / swapping unit is in a no-load state, the photovoltaic unit is controlled to supply power to the micro-energy storage unit in the microgrid. In this way, the photovoltaic unit can supply power to the micro-energy storage unit in the microgrid surrounding the charging station, further saving resources.

[0058] In some embodiments, continue to combine Figure 1 As shown, the system also includes a public power grid 08, and the photovoltaic unit 01 is connected to the public power grid 08 in sequence through the charging and swapping unit 03, the three-phase transformer 05, the microgrid 06, and the three-phase transformer 07.

[0059] Specifically, if the photovoltaic unit is in normal operating condition and the charging / swapping unit is in a no-load state, the photovoltaic unit is controlled to supply power to the public energy storage unit in the public power grid. This power supply method expands the role of photovoltaic power generation in the charging station, providing clean energy to the surrounding public power grid and further conserving resources.

[0060] In some embodiments, the battery in the charging and swapping energy storage unit can be a lithium iron phosphate battery. The battery is directly connected to the DC bus to support the bus voltage. When the photovoltaic system is intermittently working or not working, the energy storage unit maintains the bus voltage constant through the power converter connected to the bus, thereby realizing energy exchange with the grid, photovoltaic system, and electric vehicle.

[0061] In this application, a charging control method is applied to a control unit in a charging system. The charging system also includes a photovoltaic unit, an energy storage unit, and a charging / swapping unit, which are connected sequentially. The control unit communicates with the photovoltaic unit, energy storage unit, and charging / swapping unit via a communication bus. The energy storage unit includes a battery energy storage unit, a charging / swapping energy storage unit, and a bidirectional converter. The battery energy storage unit and the charging / swapping energy storage unit are connected to the charging / swapping unit via the bidirectional converter. The operating status of the photovoltaic unit is acquired, including normal and abnormal operating states. If the photovoltaic unit is in a normal operating state, the control unit supplies power to the energy storage unit through the charging / swapping unit. If the photovoltaic unit is in an abnormal operating state, the control unit supplies power to the charging / swapping energy storage unit based on the first energy storage capacity of the battery energy storage unit and the second energy storage capacity of the charging / swapping energy storage unit. The technical solution provided in this application combines photovoltaics with traditional energy storage units, increasing the availability of green, low-carbon renewable energy systems. A solar photovoltaic energy storage system, under normal operating conditions, controls the photovoltaic units to supply power to the energy storage units. This not only reduces costs but also increases the utilization rate of green and low-carbon energy, achieving the goal of carbon reduction in energy storage systems while ensuring power supply. Furthermore, when the photovoltaic units are not operating normally, the system can combine the energy storage capacity of the battery energy storage unit and the energy storage capacity of the charging and swapping energy storage unit to control the battery energy storage unit to supply power to the charging and swapping energy storage unit, ensuring the normal power supply of the charging and swapping energy storage unit.

[0062] In one exemplary embodiment, refer to Figure 1 The diagram shows a structural schematic of a charging system according to an embodiment of this application. The charging system 00 also includes a photovoltaic unit 01, an energy storage unit 02, and a charging and swapping unit 03. The photovoltaic unit 01, the energy storage unit 02, and the charging and swapping unit 03 are connected in sequence. The control unit 04 communicates with the photovoltaic unit 01, the energy storage unit 02, and the charging and swapping unit 03 respectively through a communication bus.

[0063] The energy storage unit 02 includes a battery energy storage unit 021, a charging and swapping energy storage unit 022, and a bidirectional converter 023. The battery energy storage unit 021 and the charging and swapping energy storage unit 022 are respectively connected to the charging and swapping unit 03 through the bidirectional converter 023.

[0064] This application embodiment provides a possible implementation, wherein the control unit 04 in the charging system 00 is used for: The energy storage capacity of the energy storage unit and the operating status of the charging and swapping unit are obtained. The operating status includes: on-load status and off-load status. If the energy storage capacity is greater than the first preset capacity, the photovoltaic unit is in normal working condition, and the charging and swapping unit is in no-load condition, then the photovoltaic unit is controlled to stop working.

[0065] This application embodiment provides a possible implementation, and the working state of the charging and swapping unit also includes the state of swapping batteries for the electric vehicle; The control unit 04 in the aforementioned charging system 00 is used for: If the charging and swapping unit is in the electric vehicle battery swapping state, the control unit will allocate fully charged swapping batteries to the charging and swapping unit.

[0066] This application embodiment provides a possible implementation, in which the control unit 04 in the charging system 00 is used to control the battery storage unit to supply power to the charging / swapping storage unit based on the first energy storage capacity of the battery energy storage unit and the second energy storage capacity of the charging / swapping energy storage unit, specifically for: If the first energy storage capacity is greater than the second preset capacity and the second energy storage capacity is not greater than the third preset capacity, the battery energy storage unit is controlled to supply power to the charging and swapping energy storage unit.

[0067] This application embodiment provides a possible implementation, wherein the control unit 04 in the charging system 00 is used for: If the first energy storage capacity is greater than the second preset capacity, the second energy storage capacity is not greater than the third preset capacity, and the working state of the charging and swapping unit is a loaded state, control the battery energy storage unit to supply power to the load. If the first energy storage capacity is not greater than the second preset capacity, the charging and swapping unit is in a loaded state, and the second energy storage capacity is greater than the third preset capacity, then the charging and swapping energy storage unit is controlled to supply power to the load.

[0068] This application provides a possible implementation method. The above system 00 also includes a microgrid. The photovoltaic unit is connected to the microgrid in sequence through a charging and swapping unit and a three-phase inverter. The control unit 04 in the aforementioned charging system 00 is used to: control the photovoltaic unit to supply power to the micro-energy storage unit in the microgrid if the photovoltaic unit is in normal working condition and the charging and swapping unit is in no-load condition.

[0069] This application provides a possible implementation method. The above system 00 also includes a public power grid. The photovoltaic unit is connected to the public power grid in sequence through a charging and swapping unit, a three-phase transformer, a microgrid, and another three-phase transformer. The control unit 04 in the aforementioned charging system 00 is used to control the photovoltaic unit to supply power to the public energy storage unit in the public power grid if the photovoltaic unit is in normal working condition and the charging and swapping unit is in no-load condition.

[0070] In this application, a charging control method is applied to a control unit in a charging system. The charging system also includes a photovoltaic unit, an energy storage unit, and a charging / swapping unit, which are connected sequentially. The control unit communicates with the photovoltaic unit, energy storage unit, and charging / swapping unit via a communication bus. The energy storage unit includes a battery energy storage unit, a charging / swapping energy storage unit, and a bidirectional converter. The battery energy storage unit and the charging / swapping energy storage unit are connected to the charging / swapping unit via the bidirectional converter. The operating status of the photovoltaic unit is acquired, including normal and abnormal operating states. If the photovoltaic unit is in a normal operating state, the control unit supplies power to the energy storage unit through the charging / swapping unit. If the photovoltaic unit is in an abnormal operating state, the control unit supplies power to the charging / swapping energy storage unit based on the first energy storage capacity of the battery energy storage unit and the second energy storage capacity of the charging / swapping energy storage unit. The technical solution provided in this application combines photovoltaics with traditional energy storage units, increasing the availability of green, low-carbon renewable energy systems. A solar photovoltaic energy storage system, under normal operating conditions, controls the photovoltaic units to supply power to the energy storage units. This not only reduces costs but also increases the utilization rate of green and low-carbon energy, achieving the goal of carbon reduction in energy storage systems while ensuring power supply. Furthermore, when the photovoltaic units are not operating normally, the system can combine the energy storage capacity of the battery energy storage unit and the energy storage capacity of the charging and swapping energy storage unit to control the battery energy storage unit to supply power to the charging and swapping energy storage unit, ensuring the normal power supply of the charging and swapping energy storage unit.

[0071] The system embodiments of this application can be referred to the various embodiments of the above methods, and will not be repeated here.

[0072] This application also includes device embodiments, which can be used to execute the charging control method in the above embodiments of this application. For details not disclosed in the device embodiments of this application, please refer to the embodiments of the integrated photovoltaic-storage-charging control method described above.

[0073] Based on the same inventive concept, embodiments of this application provide a computer-readable storage medium storing computer program instructions. When the computer program instructions are loaded and executed by a processor, they implement the steps of the vehicle control method described above.

[0074] Based on the same inventive concept, this application provides an electronic device, see [link to relevant documentation]. Figure 4 The diagram shows a schematic of the structure of an electronic device in an embodiment of this application. The electronic device includes one or more memories 304, one or more processors 302, and at least one computer program stored in the memory 304 and executable on the processor 302. When the processor 302 executes the computer program, it implements the steps of the vehicle control method described above.

[0075] The bus architecture (represented by bus 300) can include any number of interconnected buses and bridges, linking various circuits including one or more processors represented by processor 302 and memory represented by memory 304. Bus 300 can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 305 provides an interface between bus 300 and receiver 301 and transmitter 303. Receiver 301 and transmitter 303 can be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 302 manages bus 300 and performs general processing, while memory 304 can be used to store data used by processor 302 during operation.

[0076] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and embodiments are within the scope and spirit of this application and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Furthermore, the functional units may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit.

[0077] Based on the same inventive concept, this application provides a computer program product, including a computer program, which, when executed by a processor, implements the steps of the vehicle control method described above.

[0078] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0079] The units described as separate components may or may not be physically separate. Similarly, the components of the control device may or may not be physical units; they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0080] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer 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 steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing computer program instructions, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0081] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A charging control method, characterized in that, A control unit is applied to a charging system, the charging system further comprising a photovoltaic unit, an energy storage unit, and a charging / swapping unit, wherein the photovoltaic unit, the energy storage unit, and the charging / swapping unit are connected sequentially; the control unit communicates with the photovoltaic unit, the energy storage unit, and the charging / swapping unit respectively via a communication bus, wherein the energy storage unit includes a battery energy storage unit, a charging / swapping energy storage unit, and a bidirectional converter, and the battery energy storage unit and the charging / swapping energy storage unit are respectively connected to the charging / swapping unit via the bidirectional converter; the method includes: The operating status of the photovoltaic unit is obtained, including normal operating status and abnormal operating status; If the photovoltaic unit is in the normal operating state, control the photovoltaic unit to supply power to the energy storage unit through the charging and swapping unit; If the photovoltaic unit is in the abnormal working state, the battery energy storage unit is controlled to supply power to the charging and swapping energy storage unit based on the first energy storage capacity of the battery energy storage unit and the second energy storage capacity of the charging and swapping energy storage unit.

2. The method according to claim 1, characterized in that, The method further includes: The energy storage capacity of the energy storage unit and the operating status of the charging and swapping unit are obtained, including: a loaded state and an unloaded state. If the energy storage capacity is greater than the first preset capacity, the photovoltaic unit is in normal working condition, and the charging and swapping unit is in no-load working condition, then the photovoltaic unit is controlled to stop working.

3. The method according to claim 2, characterized in that, The working state of the charging and swapping unit also includes the state of swapping batteries for the electric vehicle. The method further includes: If the charging and swapping unit is in the electric vehicle battery swapping state, the charging and swapping energy storage unit is controlled to allocate a fully charged battery to the charging and swapping unit.

4. The method according to claim 1, characterized in that, The step of controlling the battery energy storage unit to supply power to the charging / swapping energy storage unit based on the first energy storage capacity of the battery energy storage unit and the second energy storage capacity of the charging / swapping energy storage unit includes: If the first energy storage capacity is greater than the second preset capacity and the second energy storage capacity is not greater than the third preset capacity, the battery energy storage unit is controlled to supply power to the charging and swapping energy storage unit.

5. The method according to claim 2, characterized in that, The method further includes: If the first energy storage capacity is greater than the second preset capacity, the second energy storage capacity is not greater than the third preset capacity, and the charging and swapping unit is in a loaded state, the battery energy storage unit is controlled to supply power to the load. If the first energy storage capacity is not greater than the second preset capacity, the charging and swapping unit is in a loaded state, and the second energy storage capacity is greater than the third preset capacity, then the charging and swapping energy storage unit is controlled to supply power to the load.

6. The method according to claim 1, characterized in that, The system also includes a microgrid, and the photovoltaic unit is connected to the microgrid in sequence through the charging and swapping unit and the three-phase inverter; If the photovoltaic unit is in normal working condition and the charging / swapping unit is in no-load condition, the photovoltaic unit is controlled to supply power to the micro-energy storage unit in the microgrid.

7. The method according to claim 6, characterized in that, The system also includes a public power grid, and the photovoltaic unit is connected to the public power grid in sequence through the charging and swapping unit, the three-phase transformer, the microgrid, and the three-phase transformer; If the photovoltaic unit is in the normal operating state and the charging and swapping unit is in the no-load state, the photovoltaic unit is controlled to supply power to the public energy storage unit in the public power grid.

8. A charging system, characterized in that, The charging system further includes a photovoltaic unit, an energy storage unit, a control unit, and a charging / swapping unit, wherein the photovoltaic unit, the energy storage unit, and the charging / swapping unit are connected in sequence; the control unit communicates with the photovoltaic unit, the energy storage unit, and the charging / swapping unit respectively via a communication bus; the energy storage unit includes a battery energy storage unit, a charging / swapping energy storage unit, and a bidirectional converter, wherein the battery energy storage unit and the charging / swapping energy storage unit are respectively connected to the charging / swapping unit via the bidirectional converter; The control unit is configured to: acquire the operating status of the photovoltaic unit, including normal operating status and abnormal operating status; if the photovoltaic unit is in the normal operating status, control the photovoltaic unit to supply power to the energy storage unit through the charging and swapping unit; if the photovoltaic unit is in the abnormal operating status, control the battery energy storage unit to supply power to the charging and swapping energy storage unit based on the first energy storage capacity of the battery energy storage unit and the second energy storage capacity of the charging and swapping energy storage unit.

9. An electronic device, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the method of any one of claims 1-7.

10. A storage medium having a computer program stored thereon, characterized in that, When the program is executed by a processor, it implements the steps of the method according to any one of claims 1-7.

Images