Power acquisition method for charging pile, charging pile and storage medium

Abstract

Disclosed in the present application is a power acquisition method for a charging pile. The charging pile is coupled to a photovoltaic apparatus and a power grid apparatus, and the charging pile is configured to receive electric energy provided by the photovoltaic apparatus and the power grid apparatus. The method comprises: in response to a mode selection command, determining a target charging mode; determining the supply power of a target apparatus according to the target charging mode, the target apparatus being an apparatus matched with the target charging mode amongst the photovoltaic apparatus, the power grid apparatus and the charging pile; determining the target charging power according to the supply power of the target apparatus; and controlling the charging pile to execute an power acquisition operation according to the target charging power. The charging pile provided by the present embodiments can provide a plurality of different charging modes for users, and matches the supply power of the photovoltaic apparatus and the supply power of the power grid apparatus according to the charging modes, thus improving the use efficiency of photovoltaic clean energy and reducing dependence on power supply of the power grid while meeting personalized requirements of users.

Description

Charging pile power supply method, charging pile and storage medium

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 18, 2023, with application number 202311750217.X and application name “Power collection method for charging pile, charging pile and storage medium”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of electric energy technology, and in particular to a power distribution method based on a charging pile, a charging pile, and a storage medium. Background Art

[0003] With the continuous development of new energy technologies, the demand for charging of new energy electric vehicles is also increasing. This has placed a heavy burden on power grid equipment and affected the stability of the grid power supply. Therefore, a photovoltaic charging and storage system has emerged that combines charging piles with photovoltaic power generation devices and energy storage devices. The photovoltaic power generation device stores electrical energy in the energy storage device, and combined with the peak and trough periods of the grid power supply, it provides a stable charging current for new energy vehicles and reduces the burden on the grid.

[0004] However, users' charging requirements are different, and the existing single charging mode strategy cannot meet users' personalized charging needs. Summary of the Invention

[0005] The present application provides a power distribution method based on a charging pile, a charging pile and a storage medium to solve the problem in the prior art that a single charging mode strategy is difficult to meet user needs.

[0006] In a first aspect, an embodiment of the present application provides a method for obtaining power from a charging pile, wherein the charging pile is coupled to a photovoltaic device and a power grid device, and the charging pile is configured to receive power provided by the photovoltaic device and the power grid device. The method includes:

[0007] Responding to a mode selection command, determining a target charging mode;

[0008] Determining the power supply power of a target device according to the target charging mode, the target device being a device that matches the target charging mode among the photovoltaic device, the grid device, and the charging pile;

[0009] Determining a target charging power according to the power supply power of the target device;

[0010] The charging pile is controlled to perform a power extraction operation according to the target charging power.

[0011] Optionally, the power supply method further includes:

[0012] If the target charging mode is a pure green power mode, determining that both the photovoltaic device and the grid device are target devices;

[0013] If the target charging mode is the green power priority mode, determining the photovoltaic device as the target device;

[0014] If the target charging mode is a fast charging mode, the charging pile is determined to be a target device.

[0015] Optionally, determining the target charging power according to the power supply power of the target device includes:

[0016] If the target charging mode is a pure green power mode, determining the power transmission state of the power grid device according to the power supply power of the power grid device;

[0017] The target charging power is determined according to the power transmission state and the power supply of the photovoltaic device.

[0018] Optionally, determining the power transmission state of the power grid device according to the power supply power of the power grid device includes:

[0019] Determining whether the power supply power of the power grid device is greater than a preset minimum power threshold;

[0020] If so, determining that the power transmission state is a power supply state, the power supply state is a state in which the power grid equipment provides power to the charging pile;

[0021] If not, it is determined that the power transmission state is a power receiving state, and the power receiving state is a state in which the grid device receives electric energy provided by the photovoltaic device.

[0022] Optionally, the power transmission state includes a power supply state and a power receiving state, and determining the target charging power according to the power transmission state and the power supply power of the photovoltaic device includes:

[0023] If the power transmission state is the power supply state, controlling the charging pile to perform a power reduction operation to reduce the power supply provided by the power grid device to a preset minimum power threshold, thereby obtaining a first current charging power of the charging pile, where the first current charging power is a target charging power;

[0024] If the power transmission state is the power receiving state, the charging pile is controlled to perform a power increase operation to reduce the power supply provided by the power grid equipment to a preset minimum power threshold, and the second current charging power of the charging pile is obtained, and the second current charging power is the target charging power.

[0025] Optionally, controlling the charging pile to perform a power-drawing operation according to the target charging power includes: controlling the charging pile to draw power from the photovoltaic device according to the target charging power.

[0026] Optionally, determining the target charging power according to the power supply power of the target device includes:

[0027] If the target charging mode is the green power priority mode, determining whether the power supply power of the photovoltaic device is greater than or equal to a preset minimum charging power;

[0028] If it is greater than or equal to, determining that the power supply power of the photovoltaic device is the target charging power;

[0029] If it is less than, the minimum charging power is determined to be the target charging power.

[0030] Optionally, controlling the charging pile to perform a power extraction operation according to the target charging power includes:

[0031] If the power supply of the photovoltaic device is greater than or equal to the preset minimum charging power, control the charging pile to request power from the photovoltaic device according to the power supply of the photovoltaic device;

[0032] If the power supply power of the photovoltaic device is less than the preset minimum charging power, the difference between the target charging power and the power supply power of the photovoltaic device is calculated to obtain the difference power, and the charging pile is controlled to request power from the photovoltaic device according to the power supply power of the photovoltaic device, and the charging pile is controlled to request power from the power grid device according to the difference power.

[0033] Optionally, determining the target charging power according to the power supply power of the target device includes:

[0034] If the target charging mode is a fast charging mode, the maximum charging power of the charging pile is determined to be the target charging power.

[0035] In a second aspect, an embodiment of the present application provides a charging pile, comprising a charging module and a control module communicatively connected to the charging module, the control module comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, it controls the charging module to implement the above-mentioned method.

[0036] In a third aspect, an embodiment of the present application provides a storage medium, wherein the storage medium stores a computer program, and the computer program implements the above method when executed by a processor.

[0037] In this application, the charging pile responds to a mode selection command to determine the target charging mode, determines the power supply based on the target charging mode, and then determines the target charging power based on the power supply. This allows the charging pile to provide users with multiple different charging modes and match the power supply based on the charging mode, thereby improving the efficiency of photovoltaic clean energy and reducing dependence on grid power while meeting user needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0039] FIG1 is a schematic diagram of an application scenario of a power distribution method provided by an embodiment of the present application;

[0040] FIG2 is a flow chart of a charging power distribution method according to an embodiment of the present application;

[0041] FIG3 is a flow chart of a method for calculating the target charging power of a charging pile in a matching target charging mode according to an embodiment of the present application;

[0042] FIG4 is a flow chart of a method for determining a target charging mode in response to a mode selection command according to an embodiment of the present application;

[0043] FIG5 is a schematic diagram of the architecture of a computer device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0045] First, the application environment of the method provided in the embodiment of the present application is introduced.

[0046] Please refer to Figure 1, which is a schematic diagram of an application scenario of the power distribution method provided in one embodiment of the present application. The method provided in this embodiment of the present application can be applied in a charging system such as Figure 1, which includes an energy management device 100, a charging pile 200, and a photovoltaic device 300, wherein the charging pile 200 is also connected to an external power grid device 400 to obtain power from the power grid device 400. The charging pile 200 can be electrically connected to a device to be charged 500 to charge the device to be charged 500.

[0047] The charging pile 200 is used to obtain power from the photovoltaic device 300 or the grid device 400, and provide charging power to the connected device to be charged 500 to complete the charging task of the device to be charged 500. The number of charging piles 200 can be single or multiple. Multiple charging piles 200 can form a hierarchical relationship of charging piles-charging groups-charging stations according to the control logic. Each charging pile 200 is equipped with at least one charging gun (not shown in the figure). The charging pile 200 is connected to the device to be charged 500 through the charging gun to perform the charging task. The charging gun can provide charging outputs of different powers to enable the charging pile 200 to adjust the power of the device to be charged 500. Among them, the device to be charged 500 includes a new energy electric vehicle.

[0048] The photovoltaic device 300 is used to receive sunlight and convert light energy into electrical energy to provide power to the charging station 200. For example, the photovoltaic device 300 includes a photovoltaic module formed of monocrystalline silicon or polycrystalline silicon. The photovoltaic module mainly receives sunlight during the day and uses the photoelectric effect to convert solar energy into direct current. The generated direct current is converted into alternating current through an inverter component and then incorporated into the power grid device 400 or directly used by the charging station 200. It should be noted that the specific structure and specific operating principle of the photovoltaic device 300 are not the focus of this application and are not limited here. As long as it can achieve the conversion of light energy into electrical energy, it is sufficient.

[0049] In some embodiments, the charging system also includes an energy storage device 600, such as a battery pack. The energy storage device 600 is connected to the photovoltaic device 300 and the charging pile 200 to store the electrical energy generated by the photovoltaic device 300 and provide the stored electrical energy to the charging pile 200 when necessary, thereby enabling the energy storage device 600 to cache electrical energy and further reduce the impact of power supply peaks and troughs on stability.

[0050] Grid equipment 400 is an external system independent of the charging system. Grid equipment 400 is coupled to charging station 200 to provide power to charging station 200. For example, grid equipment 400 can be a utility grid, supplying power to loads throughout a city; or grid equipment 400 can be a dedicated grid, supplying power to specific enterprises or industrial parks.

[0051] The energy management device 100 is in communication with the charging pile 200 to manage the power output from the charging pile 200 to the device to be charged 500 and the power supply obtained from the photovoltaic device 300 and / or the grid device 400. In some embodiments, the energy management device 100 is an EMS (Energy Manage System), which can be composed of one or more workstations or servers, and can monitor the charging pile 200, the photovoltaic device 300, and the grid device 400, collect and query data, and adjust the power supply relationship between the charging pile 200 and the photovoltaic device 300 and the grid device 400 based on the data. The data that the energy management device 100 can obtain includes the charging power information of the charging pile 200, the information of the device to be charged 500, the power supply information of the photovoltaic device 300, the power supply information of the grid device 400, and the interactive information sent by the user.

[0052] It is understood that the composition of the charging station 200 and energy management device 100 shown in FIG1 is merely an example. In actual practice, devices or modules may be integrated, adjusted, or added as needed. For example, the charging system may include an energy detection device, such as a smart meter, to calculate the power supply and the total amount of power supply, thereby calibrating the charging power of the charging station 200, the power supply of the photovoltaic device 300 or the power grid device 400, and calculating the power supply cost, etc. This application does not impose any restrictions on this.

[0053] Based on the above-mentioned charging system, the power distribution method based on the charging pile provided in this application can be implemented.

[0054] Please refer to FIG. 2 , which is a flow chart of a charging power allocation method provided in an embodiment of the present application. The power adjustment method shown in FIG. 2 may be performed by an energy management device. The method may include:

[0055] S21. Respond to a mode selection command and determine a target charging mode.

[0056] In this step, the mode selection command is a command sent by the user to determine the target charging mode. Specifically, the mode selection command can be a wireless communication instruction sent by the user to the energy management device via a mobile terminal, such as a user downloading an app on their phone and sending the mode selection command to the energy management device. Alternatively, the mode selection command can be information pre-set by the user in the mobile terminal, which the charging station reads through a power supply such as NFC scanning. Alternatively, the charging station scans the user's identity information, such as through facial recognition, fingerprint recognition, or pupil recognition, and uploads the identity information to the energy management device. The energy management device then reads the user's historical charging information pre-stored in a database and automatically generates the mode selection command by performing big data analysis on the historical charging information.

[0057] In this step, the target charging mode is one of multiple preset charging modes. Different charging modes correspond to different charging requirements, specifically requiring specific numerical values ​​for charging power, power source, and ratio, or a combination thereof. This means that the parameters must meet these numerical requirements during the charging process. For example, charging modes include a pure green power mode, a green power priority mode, and a fast charging mode. The pure green power mode uses photovoltaic equipment exclusively to power the charging pile, without using grid equipment. The green power priority mode uses both photovoltaic equipment and grid equipment to power the charging pile, maximizing the proportion of photovoltaic power within the power supply. The fast charging mode prioritizes achieving the charging target, outputting charging at a higher charging power, with no mandatory requirements for the power supply ratio. The above three charging modes are described in detail below and are not discussed in detail here. It should be noted that, in addition to the pure green power mode, green power priority mode, and fast charging mode, other charging modes may also be included, and this is not limited to these.

[0058] In this step, the target charging mode is directly determined by the mode selection command, and the target charging power is determined by calculating based on the target charging mode and other parameters after the target charging mode is determined. For example, the mode selection command directly carries information about the target charging mode, and the energy management device can directly determine the target charging mode to be used from a variety of charging modes after receiving the mode selection command. For different target charging modes selected according to the mode selection command, such as the pure green power mode, the mode selection command will not include the set target charging power, but the energy management device will need to calculate and determine the target charging power based on the power supply provided by the power grid equipment to the charging pile. It can be understood that in some other embodiments, the mode selection command can be determined by the user, or it can be generated autonomously by the energy management device based on other environmental factors.

[0059] S22. Determine the power supply of the target device according to the target charging mode.

[0060] In this step, the target device is a photovoltaic device, a power grid device, or a device in a charging pile that matches the target charging mode. In some embodiments, if the target charging mode is a pure green power mode, this embodiment determines that both the photovoltaic device and the power grid device are target devices. If the target charging mode is a green power priority mode, the photovoltaic device is determined to be the target device. If the target charging mode is a fast charging mode, the charging pile is determined to be the target device.

[0061] When the target device is a photovoltaic device, the target device's power supply is the power the photovoltaic device provides to the charging pile. When the target device is a grid device, the target device's power supply is the power the grid device provides to the charging pile. When the target device is a charging pile, the target device's power supply is the power the charging pile itself requires.

[0062] This embodiment can adapt to the target charging mode and flexibly find a device that matches the target charging mode among photovoltaic devices, power grid devices and charging piles as the target device, and then determine the power supply power of the target device. This avoids obtaining the power supply power of photovoltaic devices, power grid devices and charging piles without distinguishing any charging mode, which leads to invalid power calculation operations. This is conducive to the subsequent rapid calculation of the target charging power.

[0063] As mentioned above, the power supply of the target device is set according to the target charging mode and the target device, and the target device is used to provide a reference power supply for the subsequent calculation of the target charging power. In some embodiments, the power supply provided by the power grid equipment to the charging pile also changes accordingly depending on the charging mode. For example, for the pure green power mode, the power supply of the power grid equipment is 0, that is, the power grid equipment does not supply power at all; for the green power priority mode, under the premise that the photovoltaic equipment can provide sufficient power to the charging pile, the power supply of the power grid equipment can be 0. Under the premise that the photovoltaic equipment cannot meet the power supply required by the charging pile, the power supply of the power grid equipment is the power supply required by the charging pile minus the power supply that the photovoltaic equipment can provide to the charging pile.

[0064] S23. Determine the target charging power according to the power supply power of the target device.

[0065] In this step, the target charging power is the charging power output by the charging pile to the connected device to be charged, that is, the output power of the charging pile. For example, if the target charging power is determined to be 3kw, the charging pile will charge the new energy electric vehicle at a power of 3kw according to the target charging power. Accordingly, the energy management device needs to dispatch the photovoltaic equipment and / or the power grid equipment to supply power to the charging pile according to the output power of 3kw. For example, the photovoltaic equipment provides 1kw of supply power to the charging pile, and the power grid equipment provides 2kw of supply power to the charging pile, so that the output power of the charging pile is balanced with the input power. It is understandable that the target charging power is the theoretical output power obtained by scheduling according to the target charging mode, which is easy to be inconsistent with the actual output power. For example, when the power supply end of the charging pile fluctuates greatly, the power output of the output end of the charging pile cannot be stabilized at 3k, but fluctuates within a range of, for example, 2.8kw to 3.4kw.

[0066] S24: Control the charging pile to perform power extraction according to the target charging power.

[0067] In this step, the charging pile is controlled to draw power from the grid equipment and / or the photovoltaic device. Specifically, the transmission circuit between the charging pile and the grid equipment or the photovoltaic device is controlled to adjust the power supply to the photovoltaic device through the current or voltage carried by the transmission circuit. Whether power is drawn from the grid equipment, the photovoltaic device, or both depends on the target charging mode and the target charging power.

[0068] In an embodiment of the present application, a target charging mode is determined by responding to a mode selection command sent by a user, and a target charging power at the output of the charging pile is determined based on the target charging mode. Then, based on the target charging power and the constraints contained in the target charging mode, the power supplied to the charging pile input from the photovoltaic device and the power supplied to the grid device are determined. Finally, based on the power supplied to the photovoltaic device and the power supplied to the grid device, the charging pile is controlled to obtain power from the photovoltaic device and the grid device. This enables the charging pile to respond to the target charging mode set by the user for personalized charging needs, allocating corresponding supply power to different target charging modes, thereby meeting the user's personalized charging needs.

[0069] Please refer to Figure 3, which is a flow chart of a method for calculating the target charging power of a charging pile in a matching target charging mode in one embodiment of the present application. In some embodiments, the target charging mode includes a pure green power mode, and step S23 specifically includes:

[0070] S231: If the target charging mode is the pure green power mode, determine the power transmission state of the power grid equipment according to the power supply power of the power grid equipment.

[0071] S232: Determine the target charging power according to the power transmission status and the power supply of the photovoltaic equipment.

[0072] In step S231, the pure green power mode is defined as not drawing any power from the grid equipment at all, but using only the electricity generated by the photovoltaic system to power the charging pile. In other words, the power supply of the grid equipment in pure green power mode is 0. The power supply of the grid equipment is the power provided by the grid equipment to the charging pile. The specific value of the power supply of the grid equipment can be determined by a detection device such as a smart meter.

[0073] In some embodiments, determining the power transmission state of a power grid device based on the power supply power of the power grid device includes the following steps: determining whether the power supply power of the power grid device is greater than a preset minimum power threshold; if so, determining the power transmission state as a power supply state, where the power supply state is the power grid device providing power to a charging station; if not, determining the power transmission state as a power receiving state, where the power grid device receives power from a photovoltaic device. The minimum power threshold is user-defined by the designer based on business requirements; for example, the minimum power threshold is 0.

[0074] When the grid device's power supply is greater than the minimum power threshold, it indicates that the grid device is continuously supplying power to the charging pile. When the grid device's power supply is less than the minimum power threshold, it indicates that the grid device is continuously receiving power fed back by the photovoltaic device. This embodiment effectively identifies the grid device's power transmission status based on the power supply and the minimum power threshold, allowing the charging pile to adopt appropriate strategies to match the pure green power mode.

[0075] In step S232, to effectively match the pure green power mode, grid equipment in different power transmission states prompts the charging pile to select different strategies to determine the target charging power. In some embodiments, the power transmission state of the grid includes a power supply state and a power receiving state. The power supply state refers to the state in which the grid equipment provides power to the charging pile, while the power receiving state refers to the state in which the grid equipment receives power from the photovoltaic device.

[0076] In some embodiments, determining the target charging power based on the power transmission state and the power supply power of the photovoltaic equipment includes the following steps: if the power transmission state is the power supply state, controlling the charging pile to perform a power reduction operation to reduce the power supply power provided by the power grid equipment to a preset minimum power threshold, and obtaining a first current charging power of the charging pile, the first current charging power is the target charging power; if the power transmission state is the power receiving state, controlling the charging pile to perform a power increase operation to reduce the power supply power provided by the power grid equipment to a preset minimum power threshold, and obtaining a second current charging power of the charging pile, the second current charging power is the target charging power.

[0077] In the pure green electricity mode, if the transmission status is the power supply status, it means that the grid equipment is still in the state of transmitting electricity to the charging pile. This indirectly reflects that the power supply power of the photovoltaic equipment cannot meet the charging power of the charging pile. The charging pile needs to obtain electricity from the grid equipment to meet its own charging power requirements. In other words, the charging power of the charging pile is greater than the power supply power of the photovoltaic equipment, and the power supply power of the photovoltaic equipment is insufficient.

[0078] When the charging pile enters the pure green power mode, since the charging pile only receives electricity provided by photovoltaic equipment and does not receive electricity from grid equipment in the pure green power mode, the charging pile needs to perform a power reduction operation when entering the pure green power mode, reducing the power of the charging pile itself to reduce the input of the power supply of the grid equipment, thereby prompting the power supply of the grid equipment to be reduced to zero. When the power supply of the grid equipment is reduced to 0, the first current charging power of the charging pile is the target charging power.

[0079] Similarly, in the pure green power mode, if the power transmission state is the power receiving state, it means that the photovoltaic equipment transmits electric energy to the grid equipment. This indirectly reflects that the power supply of the photovoltaic equipment can not only meet the charging power of the charging pile, but also output additional power to the grid equipment. In other words, it means that the charging power of the charging pile is less than the power supply power of the photovoltaic equipment, and there is a surplus of power supply of the photovoltaic equipment.

[0080] When the charging pile enters the pure green power mode, in order to improve the utilization rate of photovoltaic power, the charging pile needs to perform a power increase operation when entering the pure green power mode to absorb more power provided by the photovoltaic equipment and avoid the power supply of the photovoltaic equipment being fed back to the power grid equipment. In this way, when the charging pile is performing the power increase operation, the power supply of the power grid equipment also increases from a negative number to zero. At this time, the second current charging power is determined as the target charging power.

[0081] In pure green power mode, after the charging pile flexibly determines the target charging power, this embodiment controls the charging pile to request power from the photovoltaic device according to the target charging power. For example, when the target charging power is the first current charging power, this embodiment controls the charging pile to request power from the photovoltaic device according to the first current charging power. When the target charging power is the second current charging power, this embodiment controls the charging pile to request power from the photovoltaic device according to the second current charging power.

[0082] In the pure green power mode, this embodiment can flexibly adopt power reduction operation or power increase operation, which not only meets the requirements of the pure green power mode but also improves the power utilization rate of the photovoltaic equipment.

[0083] Continuing to refer to FIG. 3 , in some embodiments, the target charging mode includes a green power priority mode, and step S23 specifically includes:

[0084] S233: Determine whether the power supply of the photovoltaic device is greater than or equal to a preset minimum charging power.

[0085] S234: If it is greater than or equal to, determine that the power supply power of the photovoltaic device is the target charging power.

[0086] S235: If it is less than, determine the minimum charging power as the target charging power.

[0087] In step S233, the green power priority mode is defined as obtaining as much power as possible from photovoltaic devices while relatively reducing power from grid devices, while meeting the charging power requirements. In other words, the green power priority mode requires the target charging power to be greater than the minimum charging power, and to have a higher photovoltaic device power supply or a higher photovoltaic power supply ratio. The minimum charging power is the power that the charging pile can operate with guaranteed power while meeting the green power priority mode.

[0088] In step S234, when the power supply of the photovoltaic device is greater than or equal to the minimum charging power, it means that the power supply output by the photovoltaic device can not only enable the charging pile to operate with a guaranteed minimum power, but also, in order to improve the charging efficiency of the charging pile, this embodiment determines the power supply of the photovoltaic device as the target charging power, that is, the charging pile receives and operates according to the power supply of the photovoltaic device. At this time, the power supply of the photovoltaic device is greater than the minimum charging power. Therefore, this embodiment can absorb all the power supply provided by the photovoltaic device at a high level, which is conducive to fast and efficient operation.

[0089] In step S235, if the power supplied by the photovoltaic device is less than the minimum charging power, the charging pile cannot successfully complete the charging task if it operates solely on the power provided by the photovoltaic device. It must obtain power from both the photovoltaic device and the power grid. In this case, to complete the charging task within the task time, this embodiment may set the minimum charging power as the target charging power, so that the corresponding power can be obtained from both the photovoltaic device and the power grid in the subsequent matching green power priority mode.

[0090] In the green electricity priority mode, the charging pile is controlled to perform power-drawing operations according to the target charging power, including the following steps: if the power supply power of the photovoltaic device is greater than or equal to the preset minimum charging power, the charging pile is controlled to request power from the photovoltaic device according to the power supply power of the photovoltaic device; if the power supply power of the photovoltaic device is less than the preset minimum charging power, the difference between the target charging power and the power supply power of the photovoltaic device is calculated to obtain the difference power, the charging pile is controlled to request power from the photovoltaic device according to the power supply power of the photovoltaic device, and the charging pile is controlled to request power from the power grid device according to the difference power.

[0091] For example, the minimum charging power is 3 kW, and the photovoltaic device's power supply is 1.2 kW. Since the photovoltaic device's power supply is less than the minimum charging power, this embodiment determines the minimum charging power as the target charging power, that is, the target charging power is 3 kW. This embodiment calculates the power difference, which is 3 - 1.2 = 1.8 kW. This embodiment requests power from the photovoltaic device based on the power supply power of 1.2 kW, and requests power from the grid device based on the power difference of 1.8 kW.

[0092] For another example, the minimum charging power is 3 kW, and the photovoltaic device's power supply is 6 kW. Since the photovoltaic device's power supply is greater than the minimum charging power, this embodiment determines the photovoltaic device's power supply as the target charging power, i.e., the target charging power is 6 kW. This embodiment requests power from the photovoltaic device based on the photovoltaic device's power supply of 6 kW.

[0093] This embodiment can fully utilize the power of the photovoltaic device while meeting the green power priority mode. When the power supplied by the photovoltaic device cannot meet the demand of the charging pile, the charging pile will turn to the power grid equipment to obtain the difference. This can fully utilize the power of the photovoltaic device and also enable the charging pile to operate at the minimum charging power, thereby improving the reliability of the charging pile.

[0094] Please continue to refer to FIG. 3 . In some embodiments, the target charging mode includes a fast charging mode. Step S23 specifically includes: S236 , determining the maximum charging power of the charging pile as the target charging power.

[0095] In step S236, fast charging mode is defined as completing the charging task in the shortest possible time, meaning the target charging power should be the maximum charging power. For example, if the maximum charging power provided by an AC charging station is 10 kW, and the maximum charging power of the electric vehicle to be charged is 12 kW, then 10 kW is used as the target charging power. This 10 kW target charging power can be derived entirely from the grid equipment, i.e., the grid equipment power is 10 kW and the photovoltaic equipment power is 0. Alternatively, it can be a combination of the two, e.g., the grid equipment power is 5 kW and the photovoltaic equipment power is 5 kW, without limitation.

[0096] In fast charging mode, in some embodiments, the photovoltaic device's power supply is first determined, and then a determination is made as to whether the photovoltaic device's power supply is greater than the maximum charging power. However, the photovoltaic device's power supply cannot be directly detected but must be determined based on the power supply of the grid device. For example, if the maximum charging power is determined to be 5 kW, and the grid device's power supply is detected to be -3 kW, the excess photovoltaic device power supply is actually fed back to the grid, causing the grid device's power supply to be displayed as -3 kW. This means that the photovoltaic device's power supply is actually 8 kW. In other embodiments, the remaining 3 kW of energy can be stored using an energy storage device, resulting in a charging power of 3 kW. In other embodiments, the photovoltaic device's power supply can be directly reduced to 5 kW, and the grid device's power supply is determined to be 0, to maintain a balance between the input and output power of the charging pile. If it is less than 5 kW, the grid device's power supply is determined by interpolating the maximum charging power and the photovoltaic device's power supply. For example, if the maximum charging power is 5 kW and the photovoltaic device's power supply is 2 kW, the grid device's power supply is determined to be 5 - 2 = 3 kW.

[0097] In some embodiments, in addition to the user directly determining the target charging mode through a mode selection command, the target charging mode can also be automatically matched for the user based on analysis and mining of the user's historical information. In this case, the user can use the appropriate charging mode to complete the charging task without making any selection.

[0098] Please refer to FIG4 , which is a flow chart of a method for determining a target charging mode in response to a mode selection command according to an embodiment of the present application. The method includes:

[0099] S41. Obtain historical charging data.

[0100] S42: Determine charging prediction data based on historical charging data and a preset prediction model.

[0101] S43: Determine a target charging mode according to the charging prediction data.

[0102] In step S42, the historical charging data is obtained based on the user's historical orders, and the prediction model is a classification model trained based on the sample data. For example, parameters such as charging time, charging capacity, and average charging power are extracted from the historical charging data. Clustering is performed using the DBSACAN (Density-Based Spatial Clustering of Application with Noise) or K-Means algorithm. The number of clusters is set to the number of charging modes. Charging prediction data is then assigned based on the characteristics of the clusters, such as the power supply power of photovoltaic equipment, the power supply power of grid equipment, charging capacity, and charging time.

[0103] In step S43, a target charging mode is matched for the user based on the predicted charging data, such as the power supplied by the photovoltaic system and the power supplied by the grid. For example, if the user's predicted charging time is less than 2 hours, the target charging mode is automatically matched to the fast charging mode. If the user's predicted charging time is greater than 2 hours, or if the predicted power supplied by the photovoltaic system is at least 50%, the target charging mode is automatically matched to the green power priority mode. Furthermore, in some embodiments, the target charging mode is not fixed during the charging process but is adjusted over time. For example, if the predicted charging time is 5 hours, the predicted 5-hour charging time is divided into 10 charging stages with 30-minute time periods, each corresponding to a fixed target charging mode. When a charging stage is completed or is about to complete, the target charging mode for the next charging stage is adjusted and determined based on the completion status of the current charging task. Using the example of a predicted charging time of 5 hours, the target charging mode for the first charging stage is determined to be the green power priority mode, and the charging task of 10% of the power is required to be completed in the first charging stage. However, if weather factors such as rain and clouds cause insufficient photovoltaic power supply, and the grid power is occupied by other loads, resulting in only 3% of the charging task being completed, a higher charging power target mode will be determined for the next charging phase. If the current charging phase completes 9% of the charging task, exceeding the threshold for switching charging modes, the next charging phase will continue with the current green power priority charging mode.

[0104] Furthermore, in some embodiments, if the completed charging task in the current charging phase is greater than the set charging task, the charging mode for the next charging phase is determined to be a charging mode in which the photovoltaic device's power supply is greater than the charging mode in the current charging phase. For example, if the current target charging mode is fast charging mode, the current charging task is set to 10% power, and the actual completion rate is 20%, the charging mode for the next charging phase can be adjusted to green power priority mode or pure green power mode.

[0105] In summary, the charging pile-based power distribution method provided in the embodiments of the present application provides a variety of different charging modes, and configures the power supply of the corresponding photovoltaic equipment and the power supply of the grid equipment for each different charging mode, thereby meeting the personalized needs of users. At the same time, at different charging stages of the charging process, the charging mode can be adaptively adjusted according to the completion status of the task in the current charging stage, ensuring that the charging task is completed on time while improving the efficiency of the photovoltaic power supply.

[0106] An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, wherein the computer program includes program instructions, and when the program instructions are executed by a computer, the computer executes the method as described in the above embodiment.

[0107] An embodiment of the present application also provides a power adjustment system based on a charging pile, including a charging management device and a charging station, wherein the charging station includes at least one charging group, each charging group includes at least two charging piles, and the charging management device is communicatively connected to the charging station, and the charging management device is used to execute the power adjustment method based on the charging pile as described in the above embodiment.

[0108] An embodiment of the present application also provides a charging pile, including a charging module and a control module communicatively connected to the charging module, the control module including a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the power adjustment method based on the charging pile of the aforementioned embodiment is implemented.

[0109] In one embodiment, a computer device is provided as a control module. The computer device may be a server, and its internal structure diagram may be as shown in FIG5 . The computer device 500 includes a processor 51, a non-volatile storage medium 52, a network interface 53, and an internal memory 54 connected via a system bus. The processor 51 of the computer device is used to provide computing and control capabilities. The non-volatile storage medium 52 stores an operating system, a computer program, and a database. The network interface 53 of the computer device is used to communicate with an external terminal via a network connection. The internal memory 54 provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. When the computer program is executed by the processor, a method for obtaining power from a charging pile is implemented.

[0110] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0111] Those skilled in the art will clearly understand that for the sake of convenience and brevity in description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0112] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A method for obtaining electricity from a charging pile, characterized in that: The charging pile is coupled to the photovoltaic device and the power grid device, and the charging pile is configured to receive electric energy provided by the photovoltaic device and the power grid device. The method includes: Responding to a mode selection command, determining a target charging mode; Determine the power supply power of a target device according to the target charging mode, the target device being a device matching the target charging mode among the photovoltaic device, the power grid device and the charging pile; Determining a target charging power according to the power supply power of the target device; The charging pile is controlled to perform a power extraction operation according to the target charging power.

2. The method for obtaining electricity according to claim 1, characterized in that: Also includes: If the target charging mode is a pure green power mode, determining that both the photovoltaic device and the grid device are target devices; In response to the target charging mode being the green power priority mode, determining the photovoltaic device as the target device; In response to the target charging mode being the fast charging mode, the charging pile is determined to be the target device.

3. The method for obtaining electricity according to claim 1, characterized in that: The determining the target charging power according to the power supply power of the target device comprises: In response to the target charging mode being a pure green power mode, determining a power transmission state of the power grid device according to the power supply power of the power grid device; The target charging power is determined according to the power transmission state and the power supply power of the photovoltaic device.

4. The method for obtaining electricity according to claim 3, characterized in that: Determining the power transmission state of the power grid device according to the power supply power of the power grid device includes: Determining whether the power supply power of the power grid device is greater than a preset minimum power threshold; In response to the power supply power of the power grid device being greater than a preset minimum power threshold, determining that the power transmission state is a power supply state, wherein the power supply state is a state in which the power grid device provides electric energy to the charging pile; In response to the power supply power of the grid device being less than or equal to a preset minimum power threshold, the power transmission state is determined to be a power receiving state, and the power receiving state is a state in which the grid device receives electric energy provided by the photovoltaic device.

5. The method for obtaining electricity according to claim 3, characterized in that: The power transmission state includes a power supply state and a power receiving state, and determining the target charging power according to the power transmission state and the power supply power of the photovoltaic device includes: In response to the power transmission state being the power supply state, controlling the charging pile to perform a power reduction operation to reduce the power supply provided by the power grid device to a preset minimum power threshold, and obtaining a first current charging power of the charging pile, where the first current charging power is a target charging power; In response to the power transmission state being the power receiving state, the charging pile is controlled to perform a power increase operation to reduce the power supply provided by the power grid equipment to a preset minimum power threshold, thereby obtaining a second current charging power of the charging pile, which is the target charging power.

6. The method for obtaining electricity according to claim 5, characterized in that: The controlling the charging pile to perform a power-drawing operation according to the target charging power includes: controlling the charging pile to draw power from the photovoltaic device according to the target charging power.

7. The method for obtaining electricity according to claim 1, characterized in that: The determining the target charging power according to the power supply power of the target device comprises: In response to the target charging mode being the green power priority mode, determining whether the power supply power of the photovoltaic device is greater than or equal to a preset minimum charging power; In response to the power supplied by the photovoltaic device being greater than or equal to a preset minimum charging power, determining that the power supplied by the photovoltaic device is a target charging power; In response to the power supplied by the photovoltaic device being less than a preset minimum charging power, the minimum charging power is determined as the target charging power.

8. The method for obtaining electricity according to claim 7, characterized in that: The controlling the charging pile to perform a power extraction operation according to the target charging power comprises: In response to the power supply power of the photovoltaic device being greater than or equal to a preset minimum charging power, controlling the charging pile to request power from the photovoltaic device according to the power supply power of the photovoltaic device; In response to the power supply power of the photovoltaic device being less than the preset minimum charging power, the difference between the target charging power and the power supply power of the photovoltaic device is calculated to obtain the differential power, and the charging pile is controlled to request power from the photovoltaic device according to the power supply power of the photovoltaic device, and the charging pile is controlled to request power from the power grid device according to the differential power.

9. The method for obtaining electricity according to claim 1, characterized in that: The determining the target charging power according to the power supply power of the target device comprises: In response to the target charging mode being the fast charging mode, the maximum charging power of the charging pile is determined to be the target charging power.

10. A charging pile, comprising a charging module and a control module in communication with the charging module, wherein the control module comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, it controls the charging module to implement the method according to any one of claims 1 to 9.

11. A storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 9 is implemented.

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