Charging equipment charging control method and system

Abstract

The invention provides a charging equipment charging control method and system which are applied to a photovoltaic power generation system and power grid dual-power environment, and the method comprises the steps: collecting a current photovoltaic current provided by a photovoltaic power generation system and a current power grid house-entering current in real time through a collector; according to the set maximum power grid entrance current, the set photovoltaic access maximum current value, the set photovoltaic access minimum current value and the load balancing mode, the charging current distribution of the current photovoltaic current and the current power grid entrance current on the charging equipment is controlled, and the current set value of the charging current is controlled to be within a set range; and controlling the charging equipment to charge according to the set value of the charging current. According to the embodiment, through reasonable distribution of the photovoltaic current and the power grid household current, the source and the distribution mode of the charging current are intelligently adjusted, dynamic load balancing is achieved, dependence on power grid power is reduced, and therefore the charging efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of charging control technology, and in particular to a charging control method and system for charging equipment. Background Art

[0002] With the increasing number of charging piles, especially the popularity of high-power fast charging piles, the capacity demand of charging station transformers has increased dramatically, resulting in high station construction costs and grid upgrade costs. To address this problem, operators usually use power balancing technology to prevent peak power from exceeding the transformer's carrying capacity, thereby effectively controlling the grid load. Especially in the household power environment, power balancing technology is particularly important due to the dispersed location and high expansion cost.

[0003] In addition, with the popularization of photovoltaic power generation, photovoltaic power generation has become a low-cost, environmentally friendly and easily accessible source of electricity. On this basis, the existing technology proposes to schedule charging power by adding an additional management platform, but this increases the complexity and cost of charging station construction. Some existing technologies also propose to reduce charging power through a single way of saving electricity costs, but this is not flexible enough and the user experience is poor.

[0004] Therefore, how to improve the utilization rate of photovoltaic power is the issue considered in this case.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0006] In view of the problems in the prior art, the purpose of the present invention is to provide a charging control method and system for a charging device, which overcomes the difficulties of the prior art and can improve the utilization rate of photovoltaic power.

[0007] A first aspect of the present disclosure provides a charging control method for a charging device, which is applied to a dual power supply environment of a photovoltaic power generation system and a power grid. The charging control method for a charging device includes:

[0008] Set the maximum current of the grid entering the household, the maximum current setting value of the photovoltaic access, and the minimum current setting value of the photovoltaic access;

[0009] The current photovoltaic current and the current inlet current of the power grid provided by the photovoltaic power generation system are collected in real time by a collector;

[0010] According to the set maximum current of the grid inlet, the maximum current setting value of the photovoltaic access, the minimum current setting value of the photovoltaic access and the load balancing mode, the charging current distribution of the current photovoltaic current and the current grid inlet current on the charging device is controlled, and the current setting value of the charging current is controlled within a set range;

[0011] The charging device is controlled to charge according to the current setting value of the charging current.

[0012] In some implementations, the load balancing mode includes a maximum power charging mode, a photovoltaic priority charging mode, and a photovoltaic surplus power charging mode.

[0013] In some embodiments, in the maximum power charging mode, the charging current distribution of the current photovoltaic current and the current grid current on the charging device is controlled according to the set maximum grid current, the maximum photovoltaic current setting value, the minimum photovoltaic current setting value, and the load balancing mode, and the current setting value of the charging current is controlled within a set range, including:

[0014] When the current grid current entering the household does not exceed the maximum grid current entering the household, the residual current entering the household is calculated as the maximum grid current entering the household minus the current grid current entering the household;

[0015] When the current photovoltaic current is greater than the photovoltaic access minimum current setting value, the current photovoltaic current is preferentially allocated to the charging device, and the charging current allocation of the current photovoltaic current and the current grid inlet current on the charging device is calculated according to the inlet residual current and the current photovoltaic current;

[0016] The current setting value of the charging current is adjusted according to the allocated charging current to ensure that the charging power reaches the maximum value and does not exceed the current maximum charging current capability of the charging device.

[0017] In some embodiments, the step of preferentially allocating the current photovoltaic current to the charging device, and calculating the charging current distribution of the current photovoltaic current and the current grid inlet current on the charging device according to the inlet residual current and the current photovoltaic current, comprises:

[0018] When the current photovoltaic current is less than the photovoltaic access maximum current setting value, allocating the current photovoltaic current to the charging device;

[0019] When the current photovoltaic current is not less than the photovoltaic access maximum current setting value, the current photovoltaic current is allocated according to the current maximum charging current capacity of the charging device.

[0020] In some embodiments, adjusting the current setting value of the charging current according to the allocated charging current to ensure that the charging power reaches a maximum value and does not exceed the current maximum charging current capability of the charging device includes:

[0021] The current setting value of the charging current is the minimum value between the current maximum charging current capability of the charging device and the allocated charging current.

[0022] In some embodiments, in the photovoltaic priority charging mode, according to the set maximum current of the power grid entering the household, the maximum current setting value of the photovoltaic access, the minimum current setting value of the photovoltaic access, and the load balancing mode, the charging current distribution of the current photovoltaic current and the current power grid entering the household current on the charging device is controlled, including:

[0023] When the current grid current entering the household does not exceed the maximum grid current entering the household, the residual current entering the household is calculated as the maximum grid current entering the household minus the current grid current entering the household;

[0024] When the current photovoltaic current is greater than the current allocated to the charging device by the current photovoltaic current, the charging current allocated to the charging device is equal to the current allocated to the charging device by the current photovoltaic current.

[0025] In some embodiments, in the photovoltaic priority charging mode, the calculating the charging current distribution of the current photovoltaic current and the current grid household current on the charging device according to the household residual current and the current photovoltaic current further includes:

[0026] When the current photovoltaic current is not greater than the current allocated to the charging device by the current photovoltaic current, if the sum of the current photovoltaic current and the incoming residual current is greater than the current allocated to the charging device by the current photovoltaic current, then the charging current allocated to the charging device is equal to the current allocated to the charging device by the current photovoltaic current.

[0027] In some embodiments, in the photovoltaic surplus power charging mode, the charging current distribution of the current photovoltaic current and the current grid current on the charging device is controlled according to the set maximum grid current, the photovoltaic access maximum current setting value, the photovoltaic access minimum current setting value and the load balancing mode, and the current setting value of the charging current is controlled within a set range, including:

[0028] When the reverse current of the current grid inlet current flowing to the grid is collected, if the reverse current is greater than the minimum working current of the charging device, the charging current allocated to the charging device is calculated as: the reverse current minus the minimum working current of the charging device plus the current charging current of the charging device;

[0029] The current setting value of the charging current is set according to the smaller value of the current maximum charging current capability of the charging device and the charging current allocated to the charging device.

[0030] In some embodiments, the charging device charging control method further includes:

[0031] Before adjusting the current distribution of the current photovoltaic current and the current grid inlet current when the charging device is charging according to the current photovoltaic current, the current grid inlet current and the load balancing mode, the load balancing mode set by the user is received through the client.

[0032] A second aspect of the present disclosure provides a charging device charging control system, which is applied to a dual power supply environment of a photovoltaic power generation system and a power grid, and the charging device charging control system includes:

[0033] Setting module, setting the maximum current of the power grid entering the household, the maximum current setting value of photovoltaic access, and the minimum current setting value of photovoltaic access;

[0034] The collector collects the current photovoltaic current and the current inflow of the power grid provided by the photovoltaic power generation system in real time;

[0035] A current distribution module controls the charging current distribution of the current photovoltaic current and the current grid current on the charging device according to the set maximum grid current, the maximum photovoltaic current setting value, the minimum photovoltaic current setting value and the load balancing mode, and controls the current setting value of the charging current to be within a set range;

[0036] The charging module controls the charging device to charge according to the current setting value of the charging current.

[0037] Compared with the related art, the above charging device charging control method and system have the following technical effects:

[0038] Under different charging demands and environmental conditions, the current photovoltaic current and the current grid current are reasonably distributed to intelligently adjust the source and distribution method of the charging current, achieve dynamic load balancing, reduce dependence on grid power, thereby improving charging efficiency, reducing costs and achieving optimal energy utilization.

[0039] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Other features, objectives and advantages of the present invention will become more apparent from a reading of the detailed description of non-limiting embodiments made with reference to the following accompanying drawings.

[0041] Figure 1 A schematic diagram of the topological structure of a photovoltaic power generation system and a power grid dual power supply environment provided in an embodiment of the present disclosure.

[0042] Figure 2This is a flow chart of a charging control method for a charging device provided in an embodiment of the present disclosure.

[0043] Figure 3 for Figure 1 An exemplary flow chart of a charging control method for a charging device is shown.

[0044] Figure 4 The present invention is a flow chart of a charging control method for a charging device in a maximum power charging mode.

[0045] Figure 5 The present invention is a flow chart of a charging control method for a charging device in a photovoltaic priority charging mode.

[0046] Figure 6 The present invention is a flow chart of a charging control method for a charging device in a photovoltaic surplus power charging mode.

[0047] Figure 7 A schematic diagram of the module structure of a charging control system for a charging device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0048] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the disclosure will be more comprehensive and complete and to fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0049] In addition, the accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and their repeated description will be omitted. Some of the block diagrams shown in the accompanying drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and / or processor devices and / or microcontroller devices.

[0050] In addition, the concepts of "first", "second", etc. mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0051] The disclosed embodiment proposes a charging power control scheme for charging equipment, which is used to automatically dispatch power by combining photovoltaic power generation and the power grid, thereby improving the utilization rate of photovoltaic power and further improving the utilization rate of power supply.

[0052] like Figure 1As shown, the embodiment of the present disclosure provides a dual power supply environment of a photovoltaic power generation system and a power grid, including a photovoltaic power generation system 1, a power grid 2 and a household power system 3, wherein the household power system 3 may include a common household load 31 and a charging device 32. The photovoltaic power generation system 1 and the power grid 2 provide a dual power supply environment to supply power to the household power system 3.

[0053] Among them, the embodiment of the present disclosure sets a charging device charging control system 4, which includes a first collector 41 and a second collector 42 respectively set at the entrance positions of the photovoltaic power generation system 1 and the power grid 2. The first collector 41 is used to collect the current photovoltaic current provided by the photovoltaic power generation system 1 in real time, and the second collector 42 is used to collect the current grid entrance current in real time. The charging device charging control system 4 combines the current photovoltaic current and the current grid entrance current collected in real time by the above two collectors to control the charging of the charging device 32.

[0054] In addition, an air switch 5 is coupled between the power grid 2 and the second collector 42. The air switch 5 is used to limit the maximum current of the power grid access, that is, the current entering the household by the power grid does not exceed the maximum current of the power grid entering the household to ensure that the air switch 5 does not trip due to charging, so as to achieve charging safety.

[0055] Specifically, the charging control scheme of the charging device is introduced in detail as follows.

[0056] like Figure 2 As shown, the charging control method for a charging device provided in the embodiment of the present disclosure includes but is not limited to the following steps:

[0057] Step 210: Setting the maximum current of the grid entering the household, the maximum current setting value of the photovoltaic access, the minimum current setting value of the photovoltaic access, and the load balancing mode;

[0058] Step 220: collecting the current photovoltaic current and the current inflow of the power grid provided by the photovoltaic power generation system in real time through the collector;

[0059] Step 230: According to the set maximum current of the grid inlet, the maximum current setting value of the photovoltaic access, the minimum current setting value of the photovoltaic access, and the load balancing mode, control the charging current distribution of the current photovoltaic current and the current grid inlet current on the charging device, and control the current setting value of the charging current to be within a set range;

[0060] Step 240: Control the charging device to charge according to the current setting value of the charging current.

[0061] Among them, the maximum current of the grid entering the household refers to the maximum current that a household or user can provide from the grid entering the household line. This value is set by the power company or grid operator, and is usually determined based on the power consumption capacity of the household or building, the rated value of the distribution equipment, and the grid access standard. This maximum current of the grid entering the household can be used to limit the maximum current that can be used when the charging device is connected to the grid. If this limit is exceeded, it may cause overload, circuit damage or safety accidents. Therefore, when allocating and adjusting the charging current, the setting range of the charging current is related to the maximum current of the grid entering the household.

[0062] Specifically, combined Figure 1 The air switch 5 in the circuit breaker limits the maximum current of the power grid entering the household, ensuring charging safety.

[0063] Among them, the maximum current setting value of photovoltaic access and the minimum current setting value of photovoltaic access are both manually set parameters used to determine how to use photovoltaic power generation. Specifically, the maximum current setting value of photovoltaic access refers to: a manually set parameter used to determine whether the photovoltaic power generation capacity affects the charging power. For example, in the maximum charging power mode and photovoltaic priority mode, when the photovoltaic current is greater than this value, the current allocated to the charging device by the photovoltaic system is the current maximum charging capacity (current gear) of the charging device, that is, the power of the charging device is no longer limited. This will be described in detail below.

[0064] The minimum current setting value for photovoltaic access refers to: an artificially set parameter used to determine whether the photovoltaic current is to be used for charging. That is, when the photovoltaic current is less than this value, the current allocated to the charging device by the photovoltaic system is 0, that is, the charging current is completely determined by the residual current on the grid side. This will be described in detail below.

[0065] The load balancing mode refers to the strategy of allocating current between the photovoltaic power generation system and the current inlet current of the current grid, with the aim of optimizing the current supply to the charging equipment. Different load balancing modes can adapt to different charging needs and environmental conditions.

[0066] In the embodiments of the present disclosure, the above parameters and load balancing modes are combined to enable the charging device to intelligently adjust the source and distribution method of the charging current under different charging needs and environmental conditions through the reasonable distribution of the current photovoltaic current and the current grid current entering the household, thereby achieving dynamic load balancing and reducing dependence on grid power, thereby improving charging efficiency, reducing costs and achieving optimal utilization of energy.

[0067] At the same time, this implementation method automatically distributes and adjusts the charging current through real-time collected data, thereby improving the level of automation and intelligence and optimizing operating efficiency.

[0068] In the embodiment of the present disclosure, the load balancing mode includes a maximum power charging mode, a photovoltaic priority charging mode and a photovoltaic surplus power charging mode.

[0069] Among them, the maximum power charging mode utilizes a combination of power from the grid and photovoltaic power generation to ensure that the charging power is maximized. The current photovoltaic current and the current grid current entering the household will be allocated according to demand and priority. For example, when photovoltaic power generation is sufficient, no electricity will be consumed. When photovoltaic power generation is insufficient, charging will incur electricity charges to meet the charging power requirements.

[0070] In the photovoltaic priority charging mode, the charging device uses the current photovoltaic current for charging first, which is suitable for situations where the lighting conditions are good and the current photovoltaic current is sufficient. According to the setting of the photovoltaic access minimum current setting value and the photovoltaic access maximum current setting value, it is possible to control whether the charging current is controlled by the photovoltaic current.

[0071] Among them, in the photovoltaic surplus power charging mode, the charging equipment gives priority to using the excess power (photovoltaic surplus power) generated by the photovoltaic power generation system, that is, only using the excess photovoltaic current for charging without consuming grid power, thereby maximizing the utilization of the power generated by the photovoltaic power generation system, reducing dependence on the external power grid, and improving energy utilization efficiency.

[0072] The various load balancing modes of this implementation provide different charging strategies, which can dynamically adjust the current source and distribution method according to the photovoltaic power generation situation, the current inflow of the current grid and the charging demand, optimize the charging efficiency, and make the most appropriate choice in different environments.

[0073] In the embodiments of the present disclosure, the load balancing mode can be manually set. For example, the charging control system of the charging device is provided with a user interface for receiving user operations and obtaining the corresponding load balancing mode in response to the user operations. For another example, the charging control system of the charging device interacts remotely with the user terminal, and the charging control system of the charging device receives the load balancing mode specified by the user terminal.

[0074] In this case, if Figure 3 As shown, the charging control method of the charging device includes:

[0075] Step 310: Follow Figure 1 Complete the wiring and power on the charging device;

[0076] Step 320: Set the maximum household current, the maximum photovoltaic access current setting value, the minimum photovoltaic access current setting value, and the load balancing mode;

[0077] Step 330: Determine whether it is the maximum power charging mode;

[0078] If yes, step 340: execute the maximum power charging strategy until the end;

[0079] If not, step 350: determine whether it is a photovoltaic priority charging mode;

[0080] If yes, step 360: execute the photovoltaic priority charging strategy until the end;

[0081] If not, step 370: determine whether it is a photovoltaic surplus power charging mode;

[0082] If yes, step 380: execute the photovoltaic surplus power charging strategy until it ends;

[0083] If not, then end.

[0084] In the embodiment of the present disclosure, in the maximum power charging mode, the above step 230 specifically includes but is not limited to the following steps:

[0085] When the grid-side inlet current does not exceed the grid-side maximum inlet current, the inlet residual current is calculated as the grid-set maximum current minus the current grid-side inlet current;

[0086] When the current photovoltaic current is greater than the photovoltaic access minimum current setting value, the current photovoltaic current is preferentially allocated to the charging device, and the charging current allocation of the current photovoltaic current and the current grid inlet current on the charging device is calculated according to the inlet residual current and the current photovoltaic current;

[0087] The current setting value of the charging current is adjusted according to the allocated charging current to ensure that the charging power reaches the maximum value and does not exceed the current maximum charging current capability of the charging device.

[0088] Among them, the household residual current reflects the current that the grid can provide for charging equipment. The household residual current = the maximum current set by the grid - the current grid household current. At the same time, when the current photovoltaic current is greater than the minimum photovoltaic access current setting value and less than the maximum photovoltaic access current setting value, the current photovoltaic current is used for charging first, in order to maximize the utilization rate of photovoltaic power generation.

[0089] Calculate the current residual current entering the house and the current photovoltaic current on the charging current distribution of the charging device, while ensuring that the current photovoltaic current is sufficient, maximize the use of the current photovoltaic current, and when the current photovoltaic current is insufficient, supplement the charging current through the power grid to ensure that the charging device can obtain sufficient charging current.

[0090] At the same time, the current set value of the charging current mentioned above is controlled within the set range, which may mean that the charging power reaches the maximum value and does not exceed the current maximum charging current capacity of the charging device. Therefore, based on the optimization goal of ensuring that the charging power reaches the maximum value and does not exceed the current maximum charging current capacity of the charging device, the current set value of the charging current is actually adjusted to achieve maximum power charging.

[0091] In an embodiment of the present disclosure, adjusting the current setting value of the charging current according to the allocated charging current to ensure that the charging power reaches the maximum value and does not exceed the current maximum charging current capacity of the charging device specifically includes:

[0092] The current setting value of the charging current is the minimum value between the current maximum charging current capability of the charging device and the allocated charging current.

[0093] In an optional implementation manner, the current photovoltaic current is preferentially allocated to the charging device, and the charging current distribution of the current photovoltaic current and the current grid household current on the charging device is calculated according to the household residual current and the current photovoltaic current, including:

[0094] When the current photovoltaic current is less than the photovoltaic access maximum current setting value, allocating the current photovoltaic current to the charging device;

[0095] When the current photovoltaic current is not less than the photovoltaic access maximum current setting value, the current photovoltaic current is allocated according to the current maximum charging current capacity of the charging device.

[0096] In this way, when the current photovoltaic current is less than the maximum photovoltaic access current setting value, all the current photovoltaic current is directly allocated to the charging device, which means that when the photovoltaic power generation is insufficient, the charging device only uses the current provided by the photovoltaic power generation, which can also be supplemented from the power grid. When the current photovoltaic current is not less than the maximum photovoltaic access current setting value, it indicates that the current photovoltaic current is sufficient or even excessive. At this time, the current photovoltaic current allocated is set not to exceed the hardware upper limit of the charging device (that is, the current maximum charging current capacity) to avoid equipment overload.

[0097] For the above maximum power charging mode, the present disclosure provides a specific example, such as Figure 4 As shown, taking a charging pile as an example, the charging control method of the charging device at this time includes the following repeated steps:

[0098] Step 410: Determine whether the current grid current entering the household is greater than the set maximum grid current entering the household;

[0099] If the current grid current entering the household is greater than the maximum grid current entering the household, then execute step 420, set the residual current entering the household to 0, and execute step 440;

[0100] If the current grid current entering the household is not greater than the set maximum grid current entering the household, execute step 430, set the household residual current = the maximum grid current entering the household - the current grid current entering the household, and execute step 440;

[0101] Step 440: Determine whether the current photovoltaic current is less than the photovoltaic access minimum current setting value;

[0102] If the current photovoltaic current is less than the photovoltaic access minimum current setting value, then execute step 450, set the photovoltaic distribution current to 0, and execute step 490;

[0103] If the current photovoltaic current is not less than the photovoltaic access minimum current setting value, executing step 460, determining whether the current photovoltaic current is less than the photovoltaic access maximum current setting value;

[0104] If the current photovoltaic current is less than the maximum photovoltaic access current setting value, execute step 470 to allocate all the current photovoltaic current to the charging pile, and execute step 490;

[0105] If the current photovoltaic current is not less than the maximum photovoltaic access current setting value, execute step 480, distribute the current photovoltaic current according to the current maximum charging current capacity of the charging pile, stop distributing the current grid inlet current to the charging pile, and execute step 490;

[0106] Step 490: Charging current allocated to the charging pile = residual current entering the household + current photovoltaic current allocation current;

[0107] Step 4100: Current setting value of charging current of charging pile = minimum value between current maximum charging current capacity of charging pile and charging current allocated to charging pile;

[0108] Step 4110: Charge according to the current setting value of the charging pile charging current and return to step 410.

[0109] In this embodiment, the actual current of the charging pile refers to the current currently consumed by the charging pile during the charging process. It reflects the charging demand of the charging pile, which is usually determined by the load of the charging pile (such as the battery charge state and battery capacity). For example, if the charging pile is charging an electric car and the battery of the car is half full, the charging current of the charging pile may be larger; if the battery is full, the charging pile may reduce the charging current.

[0110] Therefore, the charging current allocated to the charging pile = the residual current entering the house + the current actual current of the charging pile + the current photovoltaic current allocation current. This means that the current demand of the charging pile is determined by the current grid current entering the house, the current photovoltaic current and the demand of the charging pile itself. When the demand of the charging pile is met, the current entering the house and the current photovoltaic current will be dynamically allocated to the charging pile.

[0111] In the disclosed embodiment, in the photovoltaic priority charging mode, the charging current distribution of the current photovoltaic current and the current grid household current on the charging device is calculated according to the household residual current and the current photovoltaic current, including:

[0112] When the current grid inlet current does not exceed the maximum grid inlet current, the inlet residual current is calculated as the maximum grid inlet current minus the current grid inlet current collected in real time;

[0113] When the current photovoltaic current is greater than the current allocated to the charging device by the current photovoltaic current, the charging current allocated to the charging device is equal to the current allocated to the charging device by the current photovoltaic current.

[0114] In this photovoltaic priority charging mode, when the current actually generated by the photovoltaic power generation system (the current photovoltaic current) is greater than the current allocated to the charging device by the photovoltaic system, it indicates that the current photovoltaic current is sufficient to exceed the current previously allocated to the charging device, and the charging current allocated to the charging device is equal to the current allocated to the charging device by the current photovoltaic current, then the charging current actually allocated to the charging device will be equal to the current allocated to the charging device by the current photovoltaic current. This means that the current allocated to the charging device is adjusted to the current photovoltaic current, and the current of photovoltaic power generation is used preferentially for charging. This shows that in the case of giving priority to the current photovoltaic current, the charging current can be dynamically adjusted according to the actual situation of photovoltaic power generation, aiming to maximize the use of photovoltaic power.

[0115] In a further embodiment, in the photovoltaic priority charging mode, the charging current distribution of the current photovoltaic current and the current grid household current on the charging device is calculated according to the household residual current and the current photovoltaic current, and further includes:

[0116] When the current photovoltaic current is not greater than the current allocated to the charging device by the current photovoltaic current, if the sum of the current photovoltaic current and the incoming residual current is greater than the current allocated to the charging device by the current photovoltaic current, then the charging current allocated to the charging device is equal to the current allocated to the charging device by the current photovoltaic current.

[0117] In this embodiment, when the current photovoltaic current is not greater than the current allocated to the charging device by the current photovoltaic current, this means that in some cases, the current photovoltaic current may be lower than or equal to the current originally allocated to the charging device. When the sum of the current photovoltaic current and the residual current entering the household is greater than the current allocated to the charging device by the current photovoltaic current, this means that if the sum of the current photovoltaic current and the residual current entering the household by the power grid is still greater than the current originally allocated to the charging device, then under this condition, the current allocated to the charging device needs to be readjusted. At this time, if the above conditions are met, the charging current allocated to the charging device is equal to the current allocated to the charging device by the current photovoltaic current, and finally the current allocated to the charging device will be equal to the current originally allocated to the charging device (that is, the current allocated to the charging device by the current photovoltaic current), and the current current entering the household by the power grid will no longer be increased, ensuring that the current photovoltaic current is used first.

[0118] In other words, if the current photovoltaic current is insufficient to reach the current originally allocated to the charging device, and the sum of the remaining grid current and the current photovoltaic current is still greater than the current originally allocated to the charging device, then the charging device will not increase the current grid current, and continue to charge according to the current photovoltaic current allocated to the charging device. This logic ensures that the charging device uses the current photovoltaic current as much as possible in the "photovoltaic priority charging mode", and the current photovoltaic current allocation will not be affected by the supplement of the current grid current.

[0119] For example, if the current photovoltaic current is 5A, the current allocated to the charging device is 6A, and the residual current entering the house is 2A. If the current photovoltaic current plus the residual current entering the house (5A+2A=7A) is greater than the allocated 6A current, the original 6A current will still be allocated to the charging device and will not be adjusted to 7A.

[0120] This not only reflects the design principle of "giving priority to the current photovoltaic current", but also ensures that when the current photovoltaic current is insufficient, the remaining current from the power grid will not be automatically filled, thus keeping the current of the charging equipment within the maximum output range of photovoltaic power generation.

[0121] As an example, please refer to Figure 5 The charging device control method in the photovoltaic priority charging mode includes but is not limited to the following steps:

[0122] Step 510: Determine whether the current grid current entering the household is greater than the set maximum grid current entering the household;

[0123] If yes, step 520: the residual current entering the house is 0, and the process goes to step 540;

[0124] If not, step 530: the household residual current = the maximum household current of the power grid - the current household current of the power grid, and then proceed to step 540;

[0125] Step 540: Determine whether the current photovoltaic current is less than the photovoltaic access minimum current setting value;

[0126] If yes, step 550: the charging current allocated to the charging device by the current photovoltaic current is 0, and the process goes to step 570;

[0127] If not, step 560: determine whether the current photovoltaic current is less than the photovoltaic access maximum current setting value;

[0128] If yes, step 570: the current photovoltaic current allocated to the charging device is the total current photovoltaic current, and the process goes to step 590;

[0129] If not, step 580: the current photovoltaic current allocated to the charging device is the current maximum charging current capacity of the charging device (i.e., photovoltaic power generation restriction is no longer performed), and the process proceeds to step 590;

[0130] Step 590: Determine whether the current photovoltaic current is greater than the current photovoltaic current allocated to the charging device;

[0131] If yes, step 5100: the current allocated to the charging device = the current photovoltaic current allocated to the charging device (the photovoltaic power generation is fully consumed and will not cause the household to trip), and then proceed to step 5120;

[0132] If not, step 5110: determine whether (current photovoltaic current + household residual current) is greater than the current photovoltaic current allocated to the charging device;

[0133] If not, step 5120: the current allocated to the charging device = current photovoltaic current + residual current entering the household;

[0134] If yes, return to step 5100;

[0135] Step 5130: the current setting value of the charging current of the charging device = the minimum value between the current maximum charging current capability of the charging device itself and the charging current allocated to itself;

[0136] Step 5140: The charging device charges according to the current setting value, and returns to step 510.

[0137] In the embodiment of the present disclosure, in the photovoltaic surplus power charging mode, according to the set maximum current of the power grid entering the household, the maximum current setting value of photovoltaic access, the minimum current setting value of photovoltaic access, and the load balancing mode, the charging current distribution of the current photovoltaic current and the current power grid entering the household current on the charging device is controlled, and the current setting value of the charging current is controlled within a set range, including:

[0138] When the reverse current of the current grid inlet current flowing to the grid is collected, if the reverse current is greater than the minimum working current of the charging device, the charging current allocated to the charging device is calculated as: the reverse current minus the minimum working current of the charging device;

[0139] The current setting value of the charging current is set according to the smaller value of the current maximum charging current capability of the charging device and the charging current allocated to the charging device.

[0140] In this embodiment, the reverse current refers to the current from the grid to the household flowing in the reverse direction to the grid, which means that in some cases when the photovoltaic power generation is greater than the household load demand, the current photovoltaic current flows back to the grid. If the reverse current is greater than the minimum operating current of the charging device, it can be used to supplement the charging current. The charging current allocated to the charging device by the photovoltaic current is determined by calculating the reverse current minus the minimum operating current of the charging device. This process ensures that the charging current meets the minimum demand while not wasting the reverse-flowing electric energy.

[0141] Charging current setting: The actual current setting value of the charging current is set according to the smaller value between the current maximum charging current capacity of the charging device and the calculated charging current. This ensures that the charging current will not exceed the maximum carrying capacity of the device and can also ensure that the household load can be fully powered by photovoltaic power.

[0142] With this implementation, the current photovoltaic current is fully used to power household electrical devices (including charging equipment), and the grid power consumption is zero, which maximizes the economic benefits of household charging. Therefore, through a flexible current distribution mechanism and reverse current utilization, the use of photovoltaic power is maximized and the safe operation of charging equipment is ensured. The system optimizes the efficiency and safety of the charging process through precise current calculation and dynamic adjustment.

[0143] As an exemplary embodiment, Figure 6 As shown, in the photovoltaic surplus power charging mode, the charging control method of the charging device includes the following steps:

[0144] Step 610: Determine whether the current of the current from the grid to the grid exceeds the minimum working current of the charging device;

[0145] If yes, step 620: charging current allocated to the charging device = current grid inlet current flowing to the grid - minimum working current of the charging device, jump to step 640;

[0146] If not, step 630: the charging current allocated to the charging device is 0, and the process goes to step 640;

[0147] Step 640: the current setting value of the charging current of the charging device = the minimum value between the current maximum charging current capability of the charging device and the allocated charging current;

[0148] Step 650 : The charging device charges according to the current setting value, and returns to step 610 .

[0149] In this embodiment, it is determined whether the current current flowing into the grid from the current inlet is greater than the minimum operating current of the charging device. The current photovoltaic current flowing into the grid is the surplus power generated by the photovoltaic system, which is fed back to the grid, that is, the "reverse current". If the reverse current in the grid is lower than this value, the charging device will stop charging.

[0150] If the reverse current is greater than the minimum operating current of the charging device, the charging current of the charging device is allocated according to the reverse current, the minimum operating current of the charging device and the current charging current. This ensures that the charging device can give priority to using the surplus power of photovoltaic power generation while meeting the minimum current requirement.

[0151] If the reverse current is less than or equal to the minimum operating current of the charging device, the charging device will not receive current and will be set to 0, which means that the charging process is paused or interrupted.

[0152] cycle Figure 6 Each step in the photovoltaic surplus power charging mode is shown, and the current setting value of the charging current is adjusted in real time.

[0153] In this implementation, the charging control method ensures that the charging device preferentially uses the surplus power of the photovoltaic system, and intelligently adjusts the charging process according to the minimum operating current of the charging device and the current maximum charging current capacity, so as to achieve efficient use of photovoltaic power generation and ensure that the charging device is charged safely and stably. This strategy can help families or users reduce their dependence on grid power and improve energy efficiency.

[0154] As described above, the embodiment of the present disclosure provides a charging control system for a charging device, which specifically implements the above charging control method for the charging device. The charging control system for the charging device can be set on a local charging device, so that the user can select a load balancing mode on the charging device, and set parameters such as the maximum current entering the grid, the maximum current setting value for photovoltaic access, and the minimum current setting value for photovoltaic access, so that the charging control system can automatically execute the charging strategy.

[0155] In another embodiment, the charging control system of the charging device can be a remote control system that can interact with the charging device, and can include a client and a server. The user can configure the above-mentioned load balancing mode and corresponding parameters through the client, and the server controls the charging strategy and charging process of the charging device according to these configuration information.

[0156] For example, in the specific implementation of the remote control system, the client can be a mobile application (App) or a web control terminal, and the server is responsible for data processing and the execution of charging strategies, and interacts with the charging device through communication protocols (such as Wi-Fi, Bluetooth, Zigbee, etc.). The server can calculate the charging current of the charging device based on the configuration information received from the client and the real-time power grid and photovoltaic data, and return the control signal to the charging device, forming a complete feedback mechanism.

[0157] The charging control system installed on the local charging device performs real-time adjustments by users setting parameters on the charging device, while the remote control system (cooperating through the client and server) allows users to adjust the charging strategy from any location, which is especially important for scenarios that require remote management of multiple charging devices (such as charging station management, company parking lots, etc.).

[0158] Remote control systems can facilitate centralized management and strategy optimization, especially when grid load fluctuates greatly. Remote control can flexibly adjust the charging strategy of charging equipment according to the grid status.

[0159] The local charging control system can automatically adjust the charging current according to the grid load and photovoltaic power conditions, and also allow users to customize some key parameters (such as maximum current, minimum current, etc.), which can meet the needs of different users.

[0160] In corresponding embodiments, the charging control system can optimize the charging process according to the combination of these parameters and the automatic adjustment algorithm. For example, the charging control system can automatically switch the load balancing mode based on the automatic adjustment algorithm to achieve the purpose of optimizing charging.

[0161] In the embodiments of the present disclosure, the load balancing mode can be set in a variety of ways, such as dynamically adjusting based on time periods (peak hours, off-peak hours) or according to the load status of the power grid. Users can select different priorities, such as: giving priority to photovoltaic power, giving priority to power grid, or making a selection based on the current battery power.

[0162] In the configuration of "PV access maximum current setting value" and "PV access minimum current setting value", users can adjust these two parameters according to grid load and household electricity usage to optimize the charging process of the charging pile.

[0163] In the above implementation, the charging device can be a charging pile, or a specific device that uses a charging pile for charging, such as an electric car. Specific application scenarios include home charging systems, public charging stations, etc. In these applications, the charging device can automatically adjust the charging current according to the real-time grid status and photovoltaic power generation conditions to ensure current stability and battery health during the charging process.

[0164] For the above charging equipment charging control system, please refer to Figure 7 , which is applied to the dual power supply environment of photovoltaic power generation system and power grid, the charging equipment charging control system 700 specifically includes:

[0165] A setting module 710 is used to set the maximum current of the power grid entering the household, the maximum current setting value of the photovoltaic access, and the minimum current setting value of the photovoltaic access;

[0166] Collector 720, real-time collection of the current photovoltaic current provided by the photovoltaic power generation system and the current grid inlet current;

[0167] The current distribution module 730 controls the charging current distribution of the current photovoltaic current and the current grid current on the charging device according to the set maximum grid current, the maximum photovoltaic current setting value, the minimum photovoltaic current setting value and the load balancing mode, and controls the current setting value of the charging current to be within a set range;

[0168] The charging module 740 controls the charging device to charge according to the current setting value of the charging current.

[0169] In the above implementation, the setting module 710 allows the user to set the maximum current of the grid entering the household, the maximum current setting value of photovoltaic access, and the minimum current setting value of photovoltaic access. These are the basic parameters for controlling current distribution and ensuring stable operation of the system. In addition to setting the current parameters, you can also consider adding charging priority settings, allowing users to set priority charging modes in different environments. For example, the user can choose to give priority to charging with the current photovoltaic current, or adjust the charging method according to the grid load. In addition, time period settings can be added, such as different requirements for charging current during the day and at night, to improve the utilization efficiency of photovoltaic power.

[0170] Exemplarily, the setting module 710 can set a user interface, and the user can configure these parameters through a touch screen, buttons or a mobile application, while ensuring real-time feedback and ease of use. In order to enhance the user experience, a charging current warning or battery health management function can be provided.

[0171] In the above implementation, the collector 720 monitors and collects the current photovoltaic current and the current grid current of the photovoltaic power generation system in real time. These data are the basis for subsequent current distribution and charging control. The data acquisition frequency of the collector 720 can support second-level or millisecond-level acquisition to ensure real-time performance. When the current photovoltaic current and the current grid current fluctuate greatly, the system can respond in real time and make charging adjustments. The collector 720 can also have certain data preprocessing capabilities, such as noise filtering, data cleaning and outlier detection of the collected data to ensure the accuracy of subsequent calculations. If the collected current photovoltaic current or current grid current is abnormal, the collector can trigger an alarm or adjust the working mode.

[0172] The current distribution module 730 is responsible for allocating the current photovoltaic current according to the set parameters and load balancing mode, and ensuring that the charging current is within the settable range, ensuring the charging efficiency of the charging device and the charging health of the battery. In the load balancing mode, the charging current can be intelligently allocated according to the real-time load of the power grid (such as the real-time current power grid inlet current) and the fluctuation of the current photovoltaic current through a dynamic adjustment strategy. For example, a prediction-based allocation method is used to make adjustments in advance according to the expected photovoltaic power generation and the expected power grid demand to avoid system overload. In addition, the current distribution module 730 can also ensure that the charging current is within the set range and can be dynamically adjusted according to the battery charging state, the current photovoltaic current and the current power grid inlet current. When there are multiple power inputs, the current distribution can be automatically adjusted according to the photovoltaic power generation capacity, and the current can be ensured not to exceed the maximum tolerance of the charging device. For example, if the system supports energy feedback (for example, the excess power is fed back to the power grid after the battery is full), the current distribution module 730 can also have the ability to control the reverse current to adjust the charging mode in time according to the power grid demand.

[0173] Among them, the charging module 740 performs charging operations according to the set charging current to ensure that the charging device is charged in a reasonable charging method and meets the performance requirements of the charging device. For example, the charging module 740 may have the ability to monitor the charging process in real time, and can dynamically adjust the charging progress according to the current set value of the charging current. For example, when the current photovoltaic current is sufficient, the charging speed can be moderately increased, and when the current grid current is connected, the charging speed should be moderately reduced to avoid excessive load. During the charging process, the charging module 740 may have a battery protection mechanism, such as overcharge protection, temperature control, overcurrent protection, etc., to ensure that the charging process does not damage the battery or other components. In addition, the charging module 740 can feed back information such as charging status, remaining time, current current, etc. to the user through the user interface or remote control terminal to ensure that the user is aware of the charging status at any time.

[0174] The charging control system for charging equipment provided by the embodiments of the present disclosure not only improves the performance of the system in terms of intelligent current distribution, photovoltaic priority charging, real-time adjustment, and battery protection, but also enhances the flexibility of practical applications and intelligent management capabilities.

[0175] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A charging control method for a charging device, characterized in that: Applied to the dual power supply environment of photovoltaic power generation system and power grid, the charging control method of the charging device includes: Set the maximum current of the grid entering the household, the maximum current setting value of the photovoltaic access, and the minimum current setting value of the photovoltaic access; The current photovoltaic current and the current inlet current of the power grid provided by the photovoltaic power generation system are collected in real time by a collector; According to the set maximum current of the grid inlet, the maximum current setting value of the photovoltaic access, the minimum current setting value of the photovoltaic access and the load balancing mode, the charging current distribution of the current photovoltaic current and the current grid inlet current on the charging device is controlled, and the current setting value of the charging current is controlled within a set range; The charging device is controlled to charge according to the current setting value of the charging current.

2. The charging control method for charging equipment according to claim 1, characterized in that: The load balancing mode includes a maximum power charging mode, a photovoltaic priority charging mode and a photovoltaic surplus power charging mode.

3. The charging control method for charging equipment according to claim 2, characterized in that: In the maximum power charging mode, according to the set maximum grid inlet current, the maximum photovoltaic access current setting value, the minimum photovoltaic access current setting value and the load balancing mode, the charging current distribution of the current photovoltaic current and the current grid inlet current on the charging device is controlled, and the current setting value of the charging current is controlled within a set range, including: When the current grid current entering the household does not exceed the maximum grid current entering the household, the residual current entering the household is calculated as the maximum grid current entering the household minus the current grid current entering the household; When the current photovoltaic current is greater than the photovoltaic access minimum current setting value, the current photovoltaic current is preferentially allocated to the charging device, and the charging current allocation of the current photovoltaic current and the current grid inlet current on the charging device is calculated according to the inlet residual current and the current photovoltaic current; The current setting value of the charging current is adjusted according to the allocated charging current to ensure that the charging power reaches the maximum value and does not exceed the current maximum charging current capability of the charging device.

4. The charging control method for charging equipment according to claim 3, characterized in that: The method of preferentially allocating the current photovoltaic current to the charging device and calculating the charging current distribution of the current photovoltaic current and the current grid household current on the charging device according to the household residual current and the current photovoltaic current includes: When the current photovoltaic current is less than the photovoltaic access maximum current setting value, allocating the current photovoltaic current to the charging device; When the current photovoltaic current is not less than the photovoltaic access maximum current setting value, the current photovoltaic current is allocated according to the current maximum charging current capacity of the charging device.

5. The charging control method for charging equipment according to claim 3, characterized in that: The step of adjusting the current setting value of the charging current according to the allocated charging current to ensure that the charging power reaches a maximum value and does not exceed the current maximum charging current capability of the charging device includes: The current setting value of the charging current is the minimum value between the current maximum charging current capability of the charging device and the allocated charging current.

6. The charging control method for charging equipment according to claim 2, characterized in that: In the photovoltaic priority charging mode, the charging current distribution of the current photovoltaic current and the current grid current on the charging device is controlled according to the set maximum grid current, the photovoltaic access maximum current setting value, the photovoltaic access minimum current setting value and the load balancing mode, including: When the current grid current entering the household does not exceed the maximum grid current entering the household, the residual current entering the household is calculated as the maximum grid current entering the household minus the current grid current entering the household; When the current photovoltaic current is greater than the current allocated to the charging device by the current photovoltaic current, the current charging current allocated to the charging device is equal to the current allocated to the charging device by the current photovoltaic current.

7. The charging control method for charging equipment according to claim 6, characterized in that: In the photovoltaic priority charging mode, the charging current distribution of the photovoltaic current and the current grid household current on the charging device is calculated according to the household residual current and the current photovoltaic current, and further includes: When the current photovoltaic current is not greater than the current allocated to the charging device by the current photovoltaic current, if the sum of the current photovoltaic current and the incoming residual current is greater than the current allocated to the charging device by the current photovoltaic current, then the current charging current allocated to the charging device is equal to the current allocated to the charging device by the current photovoltaic current.

8. The charging control method for charging equipment according to claim 2, characterized in that: In the photovoltaic surplus power charging mode, according to the set maximum current of the power grid entering the household, the maximum current setting value of photovoltaic access, the minimum current setting value of photovoltaic access, and the load balancing mode, the charging current distribution of the current photovoltaic current and the current power grid entering the household current on the charging device is controlled, and the current setting value of the charging current is controlled within a set range, including: When the reverse current of the current grid inlet current flowing to the grid is collected, if the reverse current is greater than the minimum working current of the charging device, the current charging current allocated to the charging device is calculated as: the reverse current minus the minimum working current of the charging device plus the current charging current of the charging device; The current setting value of the charging current is set according to the smaller value of the current maximum charging current capability of the charging device and the current charging current allocated to the charging device.

9. The charging control method for charging equipment according to claim 1, characterized in that: The charging device charging control method further includes: Before adjusting the current photovoltaic current and the current grid inlet current for charging current distribution when the charging device is charging according to the current photovoltaic current, the current grid inlet current and the load balancing mode, the load balancing mode set by the user is received through the client.

10. A charging control system for a charging device, characterized in that: Applied to the dual power supply environment of photovoltaic power generation system and power grid, the charging control system of the charging equipment includes: Setting module, setting the maximum current of the power grid entering the household, the maximum current setting value of photovoltaic access, and the minimum current setting value of photovoltaic access; The collector collects the current photovoltaic current and the current inflow of the power grid provided by the photovoltaic power generation system in real time; A current distribution module controls the charging current distribution of the current photovoltaic current and the current grid current on the charging device according to the set maximum grid current, the maximum photovoltaic current setting value, the minimum photovoltaic current setting value and the load balancing mode, and controls the current setting value of the charging current to be within a set range; The charging module controls the charging device to charge according to the current setting value of the charging current.

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