Photovoltaic power generation system and control method thereof

Abstract

The invention provides a photovoltaic power generation system and a control method thereof, and the photovoltaic power generation system comprises a household photovoltaic power generation system which comprises a household photovoltaic panel and a household power supply circuit, and the household photovoltaic panel is connected with the household power supply circuit; the household power supply line is used for supplying power to household loads. The vehicle photovoltaic power generation system comprises a vehicle-mounted photovoltaic panel and a vehicle power supply circuit, and the vehicle-mounted photovoltaic panel is connected with the vehicle power supply circuit. The vehicle power supply line is used for charging an electric vehicle. Wherein the household photovoltaic panel is connected with the vehicle power supply circuit, and the vehicle-mounted photovoltaic panel is connected with the household power supply circuit. And the controller is electrically connected with the household photovoltaic panel, the household power supply circuit, the vehicle-mounted photovoltaic panel and the vehicle power supply circuit. The controller is used for transmitting electric quantity generated by the household photovoltaic panel and the vehicle-mounted photovoltaic panel between the household power supply circuit and the vehicle power supply circuit according to actual needs. Optical storage and charging cross-field interconnection and intercommunication of household photovoltaic and electric vehicles are achieved, photovoltaic electric energy is distributed according to needs, flexibility and high efficiency are achieved, and cost is saved.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic power generation technology, and in particular to a photovoltaic power generation system and a control method thereof. Background Art

[0002] As the world pays more attention to environmental protection and sustainable development, photovoltaic power generation technology plays an increasingly important role in the energy transformation process. Photovoltaic power generation is a technology that uses the photovoltaic effect of semiconductor interfaces to directly convert light energy into electrical energy.

[0003] Photovoltaic power generation has a wide range of applications. In the power sector, large-scale photovoltaic power stations can be connected to the power grid to achieve centralized power generation and transmit the generated electricity to power-consuming areas such as cities and factories; distributed photovoltaic power generation systems, for example: installing photovoltaic panels on the roofs of residents' homes or commercial buildings, and reducing electricity costs through photovoltaic green energy technology. In the transportation sector, photovoltaic panels are used in electric vehicles as auxiliary energy and to extend vehicle mileage. Its application scenarios are also being expanded in communications and agriculture. Summary of the invention

[0004] The present application provides a photovoltaic power generation system and a control method thereof to solve the problems in the prior art.

[0005] In a first aspect, an embodiment of the present application provides a photovoltaic power generation system, comprising:

[0006] A household photovoltaic power generation system, comprising a household photovoltaic panel and a household power supply line, wherein the household photovoltaic panel is connected to the household power supply line; the household power supply line is used to supply power to household loads;

[0007] A vehicle photovoltaic power generation system, comprising a vehicle-mounted photovoltaic panel and a vehicle-mounted power supply circuit, wherein the vehicle-mounted photovoltaic panel is connected to the vehicle-mounted power supply circuit; the vehicle-mounted power supply circuit is used to charge an electric vehicle;

[0008] Wherein, the household photovoltaic panel is connected to the vehicle power supply line, and the vehicle-mounted photovoltaic panel is connected to the household power supply line;

[0009] A controller is electrically connected to the household photovoltaic panel, the household power supply line, the vehicle-mounted photovoltaic panel and the vehicle power supply line; the controller is used to transmit the electricity generated by the household photovoltaic panel and the vehicle-mounted photovoltaic panel between the household power supply line and the vehicle power supply line according to the electricity demand of the household load and the electricity demand of the electric vehicle.

[0010] Optionally, the controller is configured to perform at least one of the following:

[0011] When there is surplus power in the household photovoltaic panel beyond the electricity demand of the household load, the surplus power of the household photovoltaic panel is transmitted to the vehicle charging cable;

[0012] When there is surplus power in the vehicle-mounted photovoltaic panel beyond the electricity demand of the electric vehicle, the surplus power of the vehicle-mounted photovoltaic panel is transmitted to the household power supply line;

[0013] When the power supply to the household load is insufficient, the power generated by the vehicle-mounted photovoltaic panel is transmitted to the household power supply line;

[0014] When the power supply to the electric vehicle is insufficient, the power generated by the household photovoltaic panel is transmitted to the vehicle power supply line.

[0015] Optionally, the photovoltaic power generation system further includes:

[0016] A first monitoring module, electrically connected to the household photovoltaic panel and the controller, the first monitoring module is used to monitor the surplus power of the household photovoltaic panel; and / or

[0017] A second monitoring module, electrically connected to the vehicle-mounted photovoltaic panel and the controller, the second monitoring module is used to monitor the surplus power of the vehicle-mounted photovoltaic panel; and / or

[0018] A third monitoring module, electrically connected to the controller, the third monitoring module is used to monitor the electricity demand of the household load; and / or

[0019] A fourth monitoring module, electrically connected to the controller, the fourth monitoring module is used to monitor the electricity demand of the electric vehicle.

[0020] Optionally, the photovoltaic power generation system further includes:

[0021] A first electrical connector, the household photovoltaic panel and the vehicle-mounted photovoltaic panel are connected to the vehicle power supply line through the first electrical connector;

[0022] A second electrical connector, the household photovoltaic panel and the vehicle-mounted photovoltaic panel are connected to the household power supply line through the second electrical connector.

[0023] Optionally, the first electrical connector and the second electrical connector are two-in-one plugs.

[0024] Optionally, at least one of the household power supply line and the vehicle power supply line is further used to connect to an external electrical load;

[0025] The controller is also used to transmit the electricity generated by at least one of the household photovoltaic panel and the vehicle photovoltaic panel to the external power load through the household power supply line or the vehicle power supply line according to the power demand of the external power load.

[0026] Optionally, the controller is further configured to perform at least one of the following:

[0027] When the household photovoltaic panel has surplus power beyond the power demand of the household load, the surplus power of the household photovoltaic panel is transmitted to the external power load;

[0028] When the on-board photovoltaic panel has surplus power beyond the power demand of the electric vehicle, the surplus power of the on-board photovoltaic panel is transmitted to the external power load;

[0029] When the power of the external power load is insufficient, the power generated by at least one of the household photovoltaic panel and the vehicle-mounted photovoltaic panel is transmitted to the external power load.

[0030] Optionally, the photovoltaic power generation system further includes a third electrical connector, and the vehicle power supply line is connected to an external power load via the third electrical connector; and / or

[0031] The photovoltaic power generation system further includes a fourth electrical connector, and the household power supply line is connected to an external power load via the fourth electrical connector.

[0032] Optionally, the third electrical connector is a vehicle-to-vehicle double-head charging gun.

[0033] Optionally, the household photovoltaic panel and the vehicle-mounted photovoltaic panel are detachable photovoltaic panels.

[0034] In a second aspect, an embodiment of the present application provides a control method for a photovoltaic power generation system as described in the first aspect, comprising:

[0035] Obtaining the electricity demand of household loads and the electricity demand of electric vehicles;

[0036] According to the electricity demand of household loads and the electricity demand of electric vehicles, the electricity generated by the household photovoltaic panel and the vehicle-mounted photovoltaic panel is transmitted between the household power supply line and the vehicle power supply line.

[0037] Optionally, the transmitting of the electricity generated by the household photovoltaic panel and the vehicle-mounted photovoltaic panel between the household power supply line and the vehicle power supply line according to the electricity demand of the household load and the electricity demand of the electric vehicle includes at least one of the following:

[0038] When the household photovoltaic panel has surplus power beyond the power demand of the household load, the surplus power of the household photovoltaic panel is transmitted to the vehicle power supply circuit;

[0039] When the on-board photovoltaic panel has surplus power beyond the power demand of the electric vehicle, the surplus power of the on-board photovoltaic panel is transmitted to the household power supply line;

[0040] When the power supply of the household load is insufficient, the power generated by the vehicle-mounted photovoltaic panel is transmitted to the household power supply line;

[0041] When the power supply of the electric vehicle is insufficient, the power generated by the household photovoltaic panel is transmitted to the vehicle power supply line.

[0042] Optionally, at least one of the household power supply line and the vehicle power supply line is also used to connect an external power load, and the control method further includes:

[0043] Obtaining the power demand of external power loads;

[0044] According to the power demand of the external power load, the power generated by at least one of the household photovoltaic panel and the vehicle-mounted photovoltaic panel is transmitted to the external power load.

[0045] Optionally, the transmitting the electricity generated by at least one of the household photovoltaic panel and the vehicle-mounted photovoltaic panel to the external power load according to the power demand of the external power load comprises at least one of the following:

[0046] When the household photovoltaic panel has surplus power beyond the power demand of the household load, the surplus power of the household photovoltaic panel is transmitted to the external power load;

[0047] When the on-board photovoltaic panel has surplus power beyond the power demand of the electric vehicle, the surplus power of the on-board photovoltaic panel is transmitted to the external power load;

[0048] When the power of the external power load is insufficient, the power generated by at least one of the household photovoltaic panel and the vehicle-mounted photovoltaic panel is transmitted to the external power load.

[0049] The photovoltaic power generation system provided in the present application has a controller that transmits the electricity generated by household photovoltaic panels and vehicle-mounted photovoltaic panels between household power supply lines and vehicle power supply lines according to the electricity demand of household loads and the electricity demand of electric vehicles, thereby realizing cross-domain interconnection and interoperability of light storage and charging of household photovoltaics and electric vehicles, distributing photovoltaic electricity on demand, flexibly and efficiently, and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1It is a structural block diagram of a photovoltaic power generation system provided by an embodiment of the present application.

[0051] Figure 2 This is a structural block diagram of a household photovoltaic power generation system provided by an embodiment of the present application.

[0052] Figure 3 It is a structural block diagram of a vehicle photovoltaic power generation system provided by an embodiment of the present application.

[0053] Figure 4 It is a structural block diagram of a photovoltaic power generation system provided by another embodiment of the present application.

[0054] Figure 5 This is a structural block diagram of a photovoltaic power generation system provided by another embodiment of the present application. DETAILED DESCRIPTION

[0055] Here, the technical solutions in the embodiments (or "implementations") of the present application will be described clearly and completely in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0056] If there are terms involving directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance.

[0057] The present application provides a photovoltaic power generation system and a control method thereof. The photovoltaic power generation system and a control method thereof of the present application are described in detail below in conjunction with the accompanying drawings. The features of the following embodiments and implementations can be combined with each other without conflict.

[0058] See also Figure 1As shown, an embodiment of the present application provides a photovoltaic power generation system, including: a household photovoltaic power generation system 10, a vehicle photovoltaic power generation system 20 and a controller 30. The household photovoltaic power generation system 10 includes a household photovoltaic panel 11 and a household power supply line 12, wherein the household photovoltaic panel 11 is connected to the household power supply line 12, and the household power supply line 12 is used to supply power to a household load 90. The vehicle photovoltaic power generation system 20 includes a vehicle-mounted photovoltaic panel 21 and a vehicle power supply line 22, wherein the vehicle-mounted photovoltaic panel 21 is connected to the vehicle power supply line 22, and the vehicle power supply line 22 is used to charge an electric vehicle 80, which can be understood as a photovoltaic electric vehicle. Among them, the household photovoltaic panel 11 is connected to the vehicle power supply line 22, and the vehicle-mounted photovoltaic panel 21 is connected to the household power supply line 12. Both the household photovoltaic panel 11 and the vehicle-mounted photovoltaic panel 21 are solar panels.

[0059] The controller 30 is electrically connected to the household photovoltaic panel 11, the household power supply line 12, the vehicle photovoltaic panel 21, and the vehicle power supply line 22. The controller 30 is used to transmit the electricity generated by the household photovoltaic panel 11 and the vehicle photovoltaic panel 21 between the household power supply line 12 and the vehicle power supply line 22 according to the power demand of the household load 90 and the power demand of the electric vehicle 80.

[0060] Through the above technical scheme, the photovoltaic power generation system provided by the present application, the controller 30 transmits the electricity generated by the household photovoltaic panel 11 and the vehicle photovoltaic panel 21 between the household power supply line 12 and the vehicle power supply line 22 according to the power demand of the household load 90 and the power demand of the electric vehicle 80, thereby realizing the cross-domain interconnection and interoperability of the light storage and charging of household photovoltaics and electric vehicles, combining the power field and the transportation field, and allocating photovoltaic power on demand, which is flexible, efficient and cost-saving.

[0061] In some optional implementations, the controller 30 is configured to perform at least one of the following:

[0062] (1) When the household photovoltaic panel 11 has surplus power beyond the power demand of the household load 90, the surplus power of the household photovoltaic panel 11 is transmitted to the vehicle charging line to charge the electric vehicle, thereby maximizing the use of the surplus power of the household photovoltaic power generation system and avoiding energy waste. The surplus power may refer to the surplus power of the household photovoltaic panel 11 beyond the power demand of the household load. The household load may include electrical appliances such as refrigerators, air conditioners, and electric lights.

[0063] (2) When the on-board photovoltaic panel 21 has surplus power beyond the power demand of the electric vehicle 80, the surplus power of the on-board photovoltaic panel 21 is transmitted to the household power supply line 12 to supply power to the household load, thereby maximizing the use of the surplus power of the vehicle photovoltaic power generation system and avoiding energy waste.

[0064] (3) When the power supply of the household load 90 is insufficient, the power generated by the vehicle-mounted photovoltaic panel 21 is transmitted to the household power supply line 12 to supply power to the household load.

[0065] (4) When the power supply of the electric vehicle 80 is insufficient, the power generated by the household photovoltaic panel 11 is transmitted to the vehicle power supply line 22 to charge the electric vehicle, thereby increasing the charging speed of the electric vehicle.

[0066] Through the above technical scheme, the photovoltaic power generation system of the present application can be applied to a variety of application scenarios, and the excess electricity generated by household photovoltaic panels can be used to charge electric vehicles. Or the excess electricity generated by vehicle-mounted photovoltaic panels can be used to power household loads. Alternatively, when the power supply of the electric vehicle is insufficient and charging is urgently needed, the electricity generated by the household photovoltaic panels is used to charge the electric vehicle first. Alternatively, when the power supply of the household load is insufficient, the electricity generated by the vehicle-mounted photovoltaic panels is used to power the household load first. In this way, the storage problem of household photovoltaic power and vehicle-mounted photovoltaic power is solved through the interconnection of household photovoltaics and vehicle-mounted photovoltaics. And the household photovoltaic power generation system can choose not to install household energy storage equipment, and does not need to be connected to the national power grid (that is, selling the remaining electricity to the power grid), and its photovoltaic power can also be effectively utilized, saving the cost of energy storage equipment and grid connection.

[0067] See also Figure 2 As shown, in some optional embodiments, the household power supply line 12 may include a household photovoltaic controller 121, a household distribution box 122 connected to the household photovoltaic controller 121, and an inverter 123 connected to the household distribution box 122, and the household load 90 is connected to the inverter 123. The household photovoltaic panel 11 can be a solar panel, which is composed of a plurality of photovoltaic cells. When sunlight shines on the solar panel, the semiconductor material (such as silicon) in the photovoltaic cell absorbs the energy of the photon, so that the electrons obtain enough energy to get rid of the atomic bondage and become free electrons, thereby generating direct current. The household photovoltaic controller 121 manages and monitors the entire household photovoltaic power generation system, controls the charging process of the solar panel, and prevents the battery from being overcharged or over-discharged. The direct current generated by the solar panel is then converted into alternating current through the household distribution box 122 and the inverter 123 to supply electrical energy to household loads, such as conventional household appliances.

[0068] See also Figure 3As shown, in some optional embodiments, the electric vehicle 80 may include a power battery 81, the vehicle power supply line 22 may include a vehicle photovoltaic controller 221 and a vehicle distribution box 222, the vehicle distribution box 222 is connected to the power battery 81, and the vehicle photovoltaic panel 21 may also be a solar panel. The vehicle photovoltaic panel 21 is generally installed on the roof or the surface of the vehicle body. The vehicle photovoltaic controller 221 may include an MPPT (Maximum Power Point Tracking) device and a DCDC (DC-to-DC converter) device, which can boost photovoltaic power to a vehicle platform voltage. When there is surplus power generated by the vehicle solar panel, the power battery can be charged through the distribution box. Maximum power point tracking refers to the inverter adjusting the output power of the photovoltaic array according to different external ambient temperature, light intensity and other characteristics, so that the photovoltaic array always outputs the maximum power. A DC-DC converter is a circuit or electromechanical device for power conversion, which can convert a direct current (DC) power supply into a direct current (or approximate direct current) power supply of different voltages. The vehicle photovoltaic controller can boost the photovoltaic power to the vehicle platform voltage. The power generated by the vehicle photovoltaic panel can be delivered to the power battery through the vehicle distribution box. When there is surplus power generated by the vehicle photovoltaic panel, it can be used to charge the power battery or delivered to the household power supply line to power household loads or to charge external loads.

[0069] In some optional embodiments, the household photovoltaic panel 11 and the vehicle-mounted photovoltaic panel 21 are detachable photovoltaic panels. When in a fixed place such as a residence, the household photovoltaic panel 11 can be fixed to a sunny place such as a roof or balcony, and the vehicle-mounted photovoltaic panel 21 can be fixed to the roof or body surface of the electric vehicle. If you need to change the residence for use or move it to other places for application, the household photovoltaic panel 11 and the vehicle-mounted photovoltaic panel 21 can be disassembled, which is convenient and portable, and can be used with the car, and can be taken and used at any time, which solves the problem of vehicle power consumption and mileage anxiety to a certain extent.

[0070] In some optional embodiments, the photovoltaic power generation system may further include a first monitoring module, a second monitoring module, a third monitoring module and a fourth monitoring module. Among them, the first monitoring module is electrically connected to the household photovoltaic panel 11 and the controller 30, and the first monitoring module is used to monitor the remaining power of the household photovoltaic panel 11. The second monitoring module is electrically connected to the vehicle-mounted photovoltaic panel 21 and the controller 30, and the second monitoring module is used to monitor the remaining power of the vehicle-mounted photovoltaic panel 21. The third monitoring module is electrically connected to the controller 30, and the third monitoring module is used to monitor the power demand of the household load 90. The fourth monitoring module is electrically connected to the controller 30, and the fourth monitoring module is used to monitor the power demand of the electric vehicle 80. Through the above settings, the remaining power of the household photovoltaic panel and the vehicle-mounted photovoltaic panel, as well as the power demand of the household load and the electric vehicle are monitored in real time through each monitoring module, and the photovoltaic power is controlled to distribute power on demand.

[0071] In some optional embodiments, the photovoltaic power generation system may further include: a first electrical connector and a second electrical connector, and the household photovoltaic panel 11 and the vehicle photovoltaic panel 21 are connected to the vehicle power supply line 22 through the first electrical connector. The household photovoltaic panel 11 and the vehicle photovoltaic panel 21 are connected to the household power supply line 12 through the second electrical connector. Optionally, the first electrical connector and the second electrical connector are two-in-one plugs. It can be understood that two-in-one plugs can be reserved on the household power supply line and the vehicle power supply line to realize the connection of the household photovoltaic panel to the vehicle power supply line and the connection of the vehicle photovoltaic panel to the household power supply line.

[0072] See also Figure 4 As shown, in some optional embodiments, at least one of the household power supply line 12 and the vehicle power supply line is also used to connect an external power load 70. The controller 30 is also used to transmit the electricity generated by at least one of the household photovoltaic panel 11 and the vehicle photovoltaic panel 21 to the external power load 70 through the household power supply line 12 or the vehicle power supply line 22 according to the power demand of the external power load 70.

[0073] Through the above settings, the household photovoltaic power generation system and the vehicle photovoltaic power generation system can not only achieve interconnection and provide a variety of charging modes, but also transmit photovoltaic power to the external power load 70. Optionally, the external power load 70 can be a conventional electric vehicle, so that the photovoltaic power generated by the household photovoltaic power generation system and the vehicle photovoltaic power generation system can be used to charge multiple vehicles, maximizing the use of the remaining power of the household photovoltaic power generation system and the vehicle photovoltaic power generation system to avoid energy waste.

[0074] In some optional implementations, the controller 30 is further configured to perform at least one of the following:

[0075] (1) When the household photovoltaic panel 11 has surplus power beyond the power demand of the household load 90, the surplus power of the household photovoltaic panel 11 is transmitted to the external power load 70. The surplus power of the household photovoltaic power generation system is utilized to the maximum extent to avoid energy waste.

[0076] (2) When the on-board photovoltaic panel 21 has surplus power beyond the power demand of the electric vehicle 80, the surplus power of the on-board photovoltaic panel 21 is transmitted to the external power load 70. The surplus power of the vehicle photovoltaic power generation system is utilized to the maximum extent to avoid energy waste.

[0077] (3) When the power of the external power load 70 is insufficient, the power generated by at least one of the household photovoltaic panel 11 and the vehicle-mounted photovoltaic panel 21 is transmitted to the external power load 70. For example, when the external power load is a conventional electric vehicle, the photovoltaic power generation system can be used to charge the conventional electric vehicle, which can save the cost of installing a charging pile, and provide a pure green energy supply mode for the electric vehicle, thereby reducing carbon emissions.

[0078] Through the above settings, the household photovoltaic power generation system and the vehicle photovoltaic power generation system can not only achieve interconnection and provide a variety of charging modes, but also transmit photovoltaic power to the external power load 70. Optionally, the external power load 70 can be a conventional electric vehicle, so that the photovoltaic power generated by the household photovoltaic power generation system and the vehicle photovoltaic power generation system can be used to charge multiple vehicles, maximizing the use of the remaining power of the household photovoltaic power generation system and the vehicle photovoltaic power generation system to avoid energy waste.

[0079] In some optional embodiments, the photovoltaic power generation system may further include a third electrical connector, through which the vehicle power supply line is connected to an external power load 70. The photovoltaic power generation system may further include a fourth electrical connector, through which the household power supply line 12 is connected to an external power load 70. Optionally, when the external power load 70 is a conventional electric vehicle, the third electrical connector is a vehicle-to-vehicle double-head charging gun, which can be directly connected between the fast charging ports of the photovoltaic electric vehicle and the conventional electric vehicle, so as to realize the transmission of the photovoltaic power generated by the vehicle-mounted photovoltaic panel or the remaining power to the conventional electric vehicle.

[0080] See also Figure 5 As shown, in Figure 5In the example shown, the household photovoltaic panel is connected to the vehicle power supply line, and the external power load is connected to the vehicle power supply system. The application scenario of the photovoltaic power generation system of the present application is that when the household photovoltaic panel has excess electricity beyond the household load demand, it can be connected to the vehicle power supply system of the photovoltaic electric vehicle through the first electrical connector to charge the photovoltaic electric vehicle. When the charging demand of the photovoltaic electric vehicle is met and there is still surplus electricity in the household photovoltaic power generation system or the vehicle photovoltaic power generation system, the remaining electricity can be used to charge a conventional electric vehicle through a car-to-car double-head charging gun, so as to maximize the use of the remaining electricity of the photovoltaic power generation system and avoid energy waste. The interconnection of light storage and charging of household photovoltaics, photovoltaic electric vehicles, and conventional electric vehicles is realized. Therefore, for conventional electric vehicles, there is no need to install additional equipment such as charging piles, saving the cost of charging equipment.

[0081] At the same time, the present invention solves the energy storage problem of each module in an independent state. For household photovoltaic power generation systems, there is no need to install household energy storage equipment or connect to the national power grid (sell the remaining electricity to the grid), and its photovoltaic power can be effectively utilized, saving energy storage equipment and grid connection costs; for vehicle-to-vehicle charging, charging piles can also be selectively installed to save charging equipment costs.

[0082] The present application also provides a control method for a photovoltaic power generation system, wherein the photovoltaic power generation system may be the photovoltaic power generation system described in the above embodiments and implementation methods, and the control method may include:

[0083] Obtaining the power demand of household loads and the power demand of electric vehicles. It is understandable that the remaining power of household photovoltaic panels and vehicle photovoltaic panels, as well as the power demand of household loads and electric vehicles can be monitored by the first monitoring module, the second monitoring module, the third monitoring module, and the fourth monitoring module of the photovoltaic power generation system.

[0084] According to the electricity demand of household loads and the electricity demand of electric vehicles, the electricity generated by the household photovoltaic panel and the vehicle-mounted photovoltaic panel is transmitted between the household power supply line and the vehicle power supply line.

[0085] Through the above technical scheme, the control method of the photovoltaic power generation system provided in the present application transmits the electricity generated by household photovoltaic panels and vehicle-mounted photovoltaic panels between household power supply lines and vehicle power supply lines according to the electricity demand of household loads and the electricity demand of electric vehicles, thereby realizing cross-domain interconnection and interoperability of light storage and charging of household photovoltaics and electric vehicles, distributing photovoltaic electricity on demand, flexibly and efficiently, and saving costs.

[0086] In some optional implementations, the transmitting of the electricity generated by the household photovoltaic panel and the vehicle-mounted photovoltaic panel between the household power supply line and the vehicle power supply line according to the power demand of the household load and the power demand of the electric vehicle may include at least one of the following:

[0087] (1) When the household photovoltaic panel has surplus power beyond the power demand of the household load, the surplus power of the household photovoltaic panel is transmitted to the vehicle power supply line 22 to charge the electric vehicle, thereby maximizing the use of the surplus power of the household photovoltaic power generation system and avoiding energy waste. The surplus power may refer to the surplus power of the household photovoltaic panel beyond the power demand of the household load. The household load may include electrical appliances such as refrigerators, air conditioners, and electric lights.

[0088] (2) When the on-board photovoltaic panel has surplus power beyond that required to meet the power demand of the electric vehicle, the surplus power of the on-board photovoltaic panel is transmitted to the household power supply line to supply power to the household load, thereby maximizing the use of the surplus power of the vehicle photovoltaic power generation system and avoiding energy waste.

[0089] (3) When the power supply of the household load is insufficient, the electricity generated by the vehicle-mounted photovoltaic panel is transmitted to the household power supply line to supply power to the household load.

[0090] (4) When the power supply of the electric vehicle is insufficient, the electricity generated by the household photovoltaic panel is transmitted to the vehicle power supply line to charge the electric vehicle, thereby increasing the charging speed of the electric vehicle.

[0091] Through the above technical scheme, the photovoltaic power generation system of the present application can be applied to a variety of application scenarios, and the excess electricity generated by household photovoltaic panels can be used to charge electric vehicles. Or the excess electricity generated by vehicle-mounted photovoltaic panels can be used to power household loads. Alternatively, when the power supply of the electric vehicle is insufficient and charging is urgently needed, the electricity generated by the household photovoltaic panels is used to charge the electric vehicle first. Alternatively, when the power supply of the household load is insufficient, the electricity generated by the vehicle-mounted photovoltaic panels is used to power the household load first. In this way, the storage problem of household photovoltaic power and vehicle-mounted photovoltaic power is solved through the interconnection of household photovoltaics and vehicle-mounted photovoltaics. And the household photovoltaic power generation system can choose not to install household energy storage equipment, and does not need to be connected to the national power grid (that is, selling the remaining electricity to the power grid), and its photovoltaic power can also be effectively utilized, saving the cost of energy storage equipment and grid connection.

[0092] In some optional implementations, at least one of the household power supply line and the vehicle power supply line is also used to connect an external power load, and the control method may further include:

[0093] Obtaining the power demand of the external power load 70. It is understandable that a separate monitoring module may be provided to monitor the power demand of the external device, or when the external power load is connected to at least one of the household power supply line and the vehicle power supply line, it is assumed that the external power load needs to be charged.

[0094] According to the power demand of the external power load, the power generated by at least one of the household photovoltaic panel and the vehicle-mounted photovoltaic panel is transmitted to the external power load to charge the external power load.

[0095] Through the above settings, the household photovoltaic power generation system and the vehicle photovoltaic power generation system can not only achieve interconnection and provide a variety of charging modes, but also transmit photovoltaic power to external power loads. Optionally, the external power load can be a conventional electric vehicle, so that the photovoltaic power generated by the household photovoltaic power generation system and the vehicle photovoltaic power generation system can be used to charge multiple vehicles, maximizing the use of the remaining power of the household photovoltaic power generation system and the vehicle photovoltaic power generation system to avoid energy waste.

[0096] In some optional implementations, the transmitting of the electricity generated by at least one of the household photovoltaic panel and the vehicle-mounted photovoltaic panel to the external power load according to the power demand of the external power load may include at least one of the following:

[0097] (1) When the household photovoltaic panel has surplus power beyond the power demand of the household load, the surplus power of the household photovoltaic panel is transmitted to the external power load, so as to maximize the use of the surplus power of the household photovoltaic power generation system and avoid energy waste.

[0098] (2) When the on-board photovoltaic panel has surplus power beyond the power demand of the electric vehicle, the surplus power of the on-board photovoltaic panel is transmitted to the external power load, so as to maximize the use of the surplus power of the household photovoltaic power generation system and avoid energy waste.

[0099] (3) When the power of the external power load is insufficient, the power generated by at least one of the household photovoltaic panel and the vehicle-mounted photovoltaic panel is transmitted to the external power load. For example, when the external power load is a conventional electric vehicle, the photovoltaic power generation system can be used to charge the conventional electric vehicle, which can save the cost of installing a charging pile, and provide a pure green energy supply mode for the electric vehicle, thereby reducing carbon emissions.

[0100] Through the above settings, the home photovoltaic power generation system and the vehicle photovoltaic power generation system can not only achieve interconnection and provide a variety of charging modes, but also transmit photovoltaic power to external power loads. The photovoltaic power generated by the home photovoltaic power generation system and the vehicle photovoltaic power generation system can be used to charge multiple vehicles, and the surplus power of the home photovoltaic power generation system and the vehicle photovoltaic power generation system can be used to the maximum extent to avoid energy waste.

[0101] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without causing conflicts. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A photovoltaic power generation system, characterized in that: include: A household photovoltaic power generation system, comprising a household photovoltaic panel and a household power supply line, wherein the household photovoltaic panel is connected to the household power supply line; the household power supply line is used to supply power to household loads; A vehicle photovoltaic power generation system, comprising a vehicle-mounted photovoltaic panel and a vehicle-mounted power supply circuit, wherein the vehicle-mounted photovoltaic panel is connected to the vehicle-mounted power supply circuit; the vehicle-mounted power supply circuit is used to charge an electric vehicle; Wherein, the household photovoltaic panel is connected to the vehicle power supply line, and the vehicle-mounted photovoltaic panel is connected to the household power supply line; A controller is electrically connected to the household photovoltaic panel, the household power supply line, the vehicle-mounted photovoltaic panel and the vehicle power supply line; the controller is used to transmit the electricity generated by the household photovoltaic panel and the vehicle-mounted photovoltaic panel between the household power supply line and the vehicle power supply line according to the electricity demand of the household load and the electricity demand of the electric vehicle.

2. The photovoltaic power generation system according to claim 1, characterized in that: The controller is configured to perform at least one of the following: When the household photovoltaic panel has surplus power beyond the power demand of the household load, the surplus power of the household photovoltaic panel is transmitted to the vehicle charging cable; When the on-board photovoltaic panel has surplus power beyond the power demand of the electric vehicle, the surplus power of the on-board photovoltaic panel is transmitted to the household power supply line; When the power supply of the household load is insufficient, the power generated by the vehicle-mounted photovoltaic panel is transmitted to the household power supply line; When the power supply of the electric vehicle is insufficient, the power generated by the household photovoltaic panel is transmitted to the vehicle power supply line.

3. The photovoltaic power generation system according to claim 2, characterized in that: The photovoltaic power generation system further comprises: a first monitoring module, electrically connected to the household photovoltaic panel and the controller, the first monitoring module being used to monitor the remaining power of the household photovoltaic panel; and / or a second monitoring module, electrically connected to the vehicle-mounted photovoltaic panel and the controller, the second monitoring module being used to monitor the remaining power of the vehicle-mounted photovoltaic panel; and / or a third monitoring module, electrically connected to the controller, and configured to monitor the power demand of household loads; and / or The fourth monitoring module is electrically connected to the controller, and the fourth monitoring module is used to monitor the power demand of the electric vehicle.

4. The photovoltaic power generation system according to claim 1, characterized in that: The photovoltaic power generation system further comprises: A first electrical connector, through which the household photovoltaic panel and the vehicle-mounted photovoltaic panel are connected to the vehicle power supply circuit; A second electrical connector, the household photovoltaic panel and the vehicle-mounted photovoltaic panel are connected to the household power supply line through the second electrical connector.

5. The photovoltaic power generation system according to claim 4, characterized in that: The first electrical connector and the second electrical connector are two-in-one plugs.

6. The photovoltaic power generation system according to claim 1, characterized in that: At least one of the household power supply circuit and the vehicle power supply circuit is also used to connect an external power load; The controller is also used to transmit the electricity generated by at least one of the household photovoltaic panel and the vehicle photovoltaic panel to the external power load through the household power supply line or the vehicle power supply line according to the power demand of the external power load.

7. The photovoltaic power generation system according to claim 6, characterized in that: The controller is further configured to perform at least one of the following: When the household photovoltaic panel has surplus power beyond the power demand of the household load, the surplus power of the household photovoltaic panel is transmitted to the external power load; When the on-board photovoltaic panel has surplus power beyond the power demand of the electric vehicle, the surplus power of the on-board photovoltaic panel is transmitted to the external power load; When the power of the external power load is insufficient, the power generated by at least one of the household photovoltaic panel and the vehicle-mounted photovoltaic panel is transmitted to the external power load.

8. The photovoltaic power generation system according to claim 6, characterized in that: The photovoltaic power generation system further comprises a third electrical connector, and the vehicle power supply line is connected to an external power load via the third electrical connector; and / or The photovoltaic power generation system further includes a fourth electrical connector, and the household power supply line is connected to an external power load via the fourth electrical connector.

9. The photovoltaic power generation system according to claim 8, characterized in that: The third electrical connector is a vehicle-to-vehicle double-ended charging gun.

10. The photovoltaic power generation system according to claim 1, characterized in that: The household photovoltaic panel and the vehicle-mounted photovoltaic panel are detachable photovoltaic panels.

11. A control method for a photovoltaic power generation system according to any one of claims 1 to 10, characterized in that: include: Obtaining the electricity demand of household loads and the electricity demand of electric vehicles; According to the electricity demand of household loads and the electricity demand of electric vehicles, the electricity generated by the household photovoltaic panel and the vehicle-mounted photovoltaic panel is transmitted between the household power supply line and the vehicle power supply line.

12. The control method according to claim 11, characterized in that: The transmitting of the electricity generated by the household photovoltaic panel and the vehicle-mounted photovoltaic panel between the household power supply line and the vehicle power supply line according to the electricity demand of the household load and the electricity demand of the electric vehicle includes at least one of the following: When the household photovoltaic panel has surplus power beyond the power demand of the household load, the surplus power of the household photovoltaic panel is transmitted to the vehicle power supply circuit; When the on-board photovoltaic panel has surplus power beyond the power demand of the electric vehicle, the surplus power of the on-board photovoltaic panel is transmitted to the household power supply line; When the power supply of the household load is insufficient, the power generated by the vehicle-mounted photovoltaic panel is transmitted to the household power supply line; When the power supply of the electric vehicle is insufficient, the power generated by the household photovoltaic panel is transmitted to the vehicle power supply line.

13. The control method according to claim 11, characterized in that: At least one of the household power supply line and the vehicle power supply line is also used to connect an external power load, and the control method further includes: Obtaining the power demand of external power loads; According to the power demand of the external power load, the power generated by at least one of the household photovoltaic panel and the vehicle-mounted photovoltaic panel is transmitted to the external power load.

14. The control method according to claim 13, characterized in that: The method of transmitting the electricity generated by at least one of the household photovoltaic panel and the vehicle-mounted photovoltaic panel to the external power load according to the power demand of the external power load comprises at least one of the following: When the household photovoltaic panel has surplus power beyond the power demand of the household load, the surplus power of the household photovoltaic panel is transmitted to the external power load; When the on-board photovoltaic panel has surplus power beyond the power demand of the electric vehicle, the surplus power of the on-board photovoltaic panel is transmitted to the external power load; When the power of the external power load is insufficient, the power generated by at least one of the household photovoltaic panel and the vehicle-mounted photovoltaic panel is transmitted to the external power load.

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