Vehicle roof photovoltaic power system

Abstract

A vehicle roof photovoltaic power system, comprising: a vehicle roof photovoltaic assembly (101); a photovoltaic power control module (102), which is connected to the vehicle roof photovoltaic assembly (101); a vehicle control unit (103); a vehicle-mounted charging apparatus (104), which is connected to the photovoltaic power control module (102); a vehicle-mounted storage battery (105), which is connected to the photovoltaic power control module (102); and a vehicle traction battery (106). The vehicle control unit (103) is configured to send a first system control instruction to the photovoltaic power control module (102) when the vehicle roof photovoltaic assembly (101) meets power generation conditions and a vehicle is in a traveling state, and to send a second system control instruction to the photovoltaic power control module (102) when the vehicle roof photovoltaic assembly (101) meets the power generation conditions and the vehicle is in a parking state. The photovoltaic power control module (102) is configured to supply power to the vehicle-mounted storage battery (105) on the basis of the first system control instruction, and to charge the vehicle traction battery (106) by means of the vehicle-mounted charging apparatus (104) on the basis of the second system control instruction and disconnect the power supply to the vehicle-mounted storage battery (105).

Description

A photovoltaic power system on the top of a vehicle Technical Field

[0001] The present invention mainly relates to the field of photovoltaics, and in particular to a photovoltaic power system on the roof of a vehicle. Background Art

[0002] Energy conservation and emission reduction are important measures to achieve the goals of carbon neutrality and carbon peak, and the promotion and use of new energy vehicles is an important measure to achieve the goals of energy conservation and emission reduction.

[0003] As photovoltaic power generation technology continues to mature, installing photovoltaic systems on new energy vehicles will improve their range. However, existing photovoltaic systems used in new energy vehicles are relatively simple to apply, requiring only adhesives to secure the panels, with installation primarily at the rear of the vehicle. Furthermore, achieving efficient utilization of the electricity generated by photovoltaic systems is a challenge that needs to be addressed.

[0004] Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a photovoltaic power system on the roof of a vehicle, to achieve efficient and convenient application of the vehicle photovoltaic power system, and to improve the photovoltaic power generation efficiency of the vehicle.

[0006] In order to solve the above technical problems, the present invention provides a vehicle roof photovoltaic power system, comprising: a vehicle roof photovoltaic component; a photovoltaic power control module, connected to the vehicle roof photovoltaic component; a vehicle control unit, connected to the photovoltaic power control module; an on-board charging device, connected to the photovoltaic power control module; an on-board battery, connected to the photovoltaic power control module; a vehicle power battery, connected to the on-board charging device; the vehicle control unit is configured to: when the vehicle roof photovoltaic component meets the power generation conditions and the vehicle is in a moving state, issue a first system control instruction to the photovoltaic power control module; when the vehicle roof photovoltaic component meets the power generation conditions and the vehicle is in a parked state, issue a second system control instruction to the photovoltaic power control module; the photovoltaic power control module is configured to: supply power to the on-board battery based on the first system control instruction; based on the second system control instruction, charge the vehicle power battery through the on-board charging device and disconnect the power supply to the on-board battery.

[0007] In one embodiment of the present invention, the photovoltaic power control module includes a main control unit, a photovoltaic inverter and a voltage inverter that are interconnected; the main control unit is connected to the vehicle control unit; the photovoltaic inverter is connected to the photovoltaic assembly on the top of the vehicle; the photovoltaic inverter is also connected to the on-board battery; the voltage inverter is connected to the on-board charging device; the photovoltaic inverter is configured to output a DC voltage signal, and the voltage inverter is configured to output an AC voltage signal.

[0008] In one embodiment of the present invention, the photovoltaic power system on the roof of the vehicle also includes an on-board AC power supply interface; the on-board AC power supply interface is connected to the voltage inverter; the photovoltaic power control module is also configured to: supply power to the on-board AC power supply interface based on the first system control instruction; and disconnect the power supply to the on-board AC power supply interface based on the second system control instruction.

[0009] In one embodiment of the present invention, the vehicle roof photovoltaic power system also includes a low-voltage load device; the low-voltage load device is connected to the photovoltaic inverter of the photovoltaic power control module; the photovoltaic power control module is further configured to: supply power to the low-voltage load device based on the first system control instruction; and disconnect the power supply to the low-voltage load device based on the second system control instruction.

[0010] In one embodiment of the present invention, the low-voltage load device is further connected to the vehicle-mounted battery to receive power from the vehicle-mounted battery.

[0011] In one embodiment of the present invention, the photovoltaic power system on the roof of the vehicle further includes a DC-DC converter; the vehicle power battery is connected to the on-board battery via the DC-DC converter.

[0012] In one embodiment of the present invention, the vehicle roof photovoltaic power system further includes a low-voltage load device; the vehicle power battery is connected to the low-voltage load device via the DC-DC converter to supply power to the low-voltage load device.

[0013] In one embodiment of the present invention, the vehicle control unit is configured to: when the photovoltaic components on the top of the vehicle do not meet the power generation conditions, issue a third system control instruction to the photovoltaic power control module; the photovoltaic power control module is configured to: disconnect the power supply to the on-board battery based on the third system control instruction, and stop charging the vehicle power battery through the on-board charging device.

[0014] In one embodiment of the present invention, the vehicle roof photovoltaic assembly includes a curved vehicle roof photovoltaic assembly that conforms to the shape of the vehicle roof.

[0015] In one embodiment of the present invention, the curved vehicle roof photovoltaic module includes curved glass, a packaging film, a photovoltaic cell array and a curved backing layer; a first packaging film and a second packaging film are respectively provided on both sides of the photovoltaic cell array, the curved glass is provided above the first packaging film, and the curved backing layer is provided below the second packaging film.

[0016] In one embodiment of the present invention, the material of the curved glass includes one or more materials selected from low-iron glass, white glass, tempered glass and semi-tempered glass; the material of the curved backing layer includes one or more materials selected from low-iron glass, white glass, tempered glass, semi-tempered glass, low-emissivity glass, glass fiber reinforced resin and carbon fiber reinforced epoxy resin.

[0017] In one embodiment of the present invention, the bonding surface between the curved glass and the first packaging film includes an anti-reflective coating, and the material of the anti-reflective coating includes acrylic polyurethane paint or silicate glass glaze; the light-receiving surface of the curved glass is provided with a hydrophobic film layer and an anti-reflection and anti-reflection film layer.

[0018] In one embodiment of the present invention, the photovoltaic cell array includes single crystal silicon, indium gallium selenide, cadmium telluride, perovskite or perovskite stacked type photovoltaic cells.

[0019] In one embodiment of the present invention, the packaging film includes a high molecular polymer thermoplastic or thermosetting packaging film.

[0020] Compared with the existing technology, the present invention has the following advantages: the technical solution of this application adopts different photovoltaic power system control modes based on different vehicle usage and operation scenarios, realizes the efficient operation and use of the vehicle photovoltaic power system, and gives full play to the efficiency of the photovoltaic power system on the top of the vehicle.

[0021] Summary of the Figures

[0022] The accompanying drawings are provided to provide a further understanding of the present application. They are incorporated into and constitute a part of the present application. The accompanying drawings illustrate embodiments of the present application and, together with the present specification, serve to explain the principles of the present application. In the accompanying drawings:

[0023] FIG1 is a schematic diagram of the composition of a photovoltaic power system on a vehicle roof according to an embodiment of the present application.

[0024] FIG2 is a schematic diagram of the composition of a photovoltaic power system on the roof of a vehicle according to an embodiment of the present application.

[0025] FIG3 is a schematic structural diagram of a photovoltaic assembly on the roof of a vehicle according to an embodiment of the present application.

[0026] Preferred embodiments of the present invention

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings described below are merely examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without inventive effort. Unless otherwise apparent from the context or otherwise noted, the same reference numerals in the figures represent the same structure or operation.

[0028] As used in this application and the claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" are not intended to refer to the singular but may include the plural. Generally speaking, the terms "comprises" and "include" only indicate the inclusion of the steps and elements specifically identified, and these steps and elements do not constitute an exclusive list. A method or apparatus may also include other steps or elements.

[0029] Unless otherwise specifically stated, the relative arrangement of the components and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of this application. Meanwhile, it should be understood that for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0030] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0031] The embodiments of the present application describe a photovoltaic power system on the roof of a vehicle.

[0032] Figure 1 is a schematic diagram of the components of a vehicle-mounted photovoltaic power system according to one embodiment of the present application. Referring to Figure 1 , the vehicle-mounted photovoltaic power system 100 includes a vehicle-mounted photovoltaic module 101, a photovoltaic power control module 102, a vehicle control unit 103, an onboard charging device 104, an onboard battery 105, and a vehicle power battery 106.

[0033] The photovoltaic power control module 102 is connected to the photovoltaic assembly 101 on the vehicle roof. The vehicle control unit 103 is connected to the photovoltaic power control module 102. The onboard charging device 104 is connected to the photovoltaic power control module 102. The onboard battery 105 is connected to the photovoltaic power control module 102. The vehicle power battery 106 is connected to the onboard charging device 104.

[0034] The vehicle control unit 103 is configured to issue a first system control instruction to the photovoltaic power control module 102 when the vehicle's rooftop photovoltaic panels 101 meet power generation conditions and the vehicle is in motion; and to issue a second system control instruction to the photovoltaic power control module 102 when the vehicle's rooftop photovoltaic panels 101 meet power generation conditions and the vehicle is parked. Communication between the photovoltaic power control module 102 and the vehicle control unit 103 is achieved, for example, via a CAN bus. The power generation condition for the vehicle's rooftop photovoltaic panels 101 is, for example, the presence of sunlight at a specific intensity.

[0035] The photovoltaic power control module 102 is configured to: supply power to the vehicle battery 105 based on the first system control instruction; charge the vehicle power battery 106 through the vehicle charging device 104 based on the second system control instruction, and disconnect the power supply to the vehicle battery 105.

[0036] FIG2 is a schematic diagram of the composition of a photovoltaic power system on the roof of a vehicle according to an embodiment of the present application.

[0037] In some embodiments, referring to Figures 1 and 2 , the photovoltaic power control module 102 includes a main control unit 201, a photovoltaic inverter 202, and a voltage inverter 203, which are interconnected. The main control unit 201 is connected to the vehicle control unit 103. The photovoltaic inverter 202 is connected to the photovoltaic module 101 on the roof of the vehicle. The photovoltaic inverter 202 is also connected to the onboard battery 105. The voltage inverter 203 is connected to the onboard charging device 104. The photovoltaic inverter 202 is configured to output a DC voltage signal, and the voltage inverter 203 is configured to output an AC voltage signal.

[0038] The vehicle rooftop photovoltaic power system 100 also includes an onboard AC power interface 107. This interface is connected to the voltage inverter 203. The photovoltaic power control module 102 is further configured to, for example, supply power to the onboard AC power interface 107 based on a first system control instruction and, based on a second system control instruction, disconnect the power supply to the onboard AC power interface 107. The onboard AC power interface 107 can, for example, provide a charging interface for a mobile terminal.

[0039] In some embodiments, the vehicle rooftop photovoltaic power system 100 further includes a low-voltage load device 108. Low-voltage load device 108 is connected to the photovoltaic inverter 202 of the photovoltaic power control module 102. The photovoltaic power control module 102 is further configured to: supply power to the low-voltage load device 108 based on a first system control instruction; and to disconnect power to the low-voltage load device 108 based on a second system control instruction. Low-voltage load device 108 includes, for example, a ventilation system, a vehicle dashboard, and the like.

[0040] In some embodiments, the low-voltage load device 108 is further connected to the vehicle battery 105 to receive power from the vehicle battery 105. The vehicle roof photovoltaic power system 100 also includes a DC-DC converter 109. The vehicle power battery 106 is connected to the vehicle battery 105 via the DC-DC converter 109. The vehicle battery 105 provides two voltage levels, for example, 12V and 24V.

[0041] For example, the vehicle control unit 103 is configured to issue a third system control instruction to the photovoltaic power control module 102 if the photovoltaic assembly 101 on the vehicle roof fails to meet power generation conditions. Based on the third system control instruction, the photovoltaic power control module 102 is configured to disconnect power to the onboard battery 105 and stop charging the vehicle power battery 106 via the onboard charger 104.

[0042] In some embodiments, the vehicle roof photovoltaic assembly 101 comprises a curved vehicle roof photovoltaic assembly that conforms to the shape of the vehicle roof, wherein the curvature radius of the vehicle roof photovoltaic assembly 101 ranges from 800 to 7000 millimeters (mm).

[0043] FIG3 is a schematic structural diagram of a photovoltaic assembly on the roof of a vehicle according to an embodiment of the present application.

[0044] In some embodiments, referring to FIG3 , the curved vehicle roof photovoltaic module 101 includes curved glass 301, an encapsulating film 302, a photovoltaic cell array 303, and a curved backing layer 304. A first encapsulating film 311 and a second encapsulating film 312 are provided on both sides of the photovoltaic cell array 303, respectively. The curved glass 301 is provided above the first encapsulating film 311, and the curved backing layer 304 is provided below the second encapsulating film 312. In FIG3 , the upper side is, for example, the direction corresponding to direction X. The encapsulating film 302 includes, for example, a polymer thermoplastic or thermosetting encapsulating film. The polymer thermoplastic or thermosetting encapsulating film includes one or more materials selected from ethylene-vinyl acetate copolymer (EVA), POE plastic, expandable polyethylene (EPE), polyvinyl butyral (PVB), thermoplastic polyurethane elastomer (TPU), and thermoplastic polyolefin (TPO).

[0045] The curved glass 301 may be made of, for example, one or more of low-iron glass, clear glass, tempered glass, and semi-tempered glass. The curved backing layer 304 may be made of, for example, one or more of low-iron glass, clear glass, tempered glass, semi-tempered glass, low-e glass, glass fiber reinforced resin, and carbon fiber reinforced epoxy resin.

[0046] The bonding surface between the curved glass 301 and the first encapsulating film 311 includes an anti-reflective coating 321, made of acrylic polyurethane paint or silicate glass glaze. The light-receiving surface of the curved glass 301 is also coated with, for example, a hydrophobic film layer and an anti-reflection and anti-reflection coating layer. The hydrophobic film layer provides a self-cleaning function for the photovoltaic module on the vehicle's roof. The anti-reflection and anti-reflection coating layer increases light transmittance, for example, to greater than or equal to 90%.

[0047] The photovoltaic cell array 303 includes single crystal silicon, indium gallium selenide, cadmium telluride, perovskite or perovskite stacked type photovoltaic cells. The photovoltaic cell array 303 includes a plurality of parallel cell strings, each cell string consisting of the same type of photovoltaic cells connected in series. A diode is set in parallel with each cell string, such as the diode 322 shown in Figure 3. The diode is set in an embedded or external manner. The embedded diode is connected to the relevant circuit in the form of soldering, and the external diode is soldered or resistor welded in the output harness. The curved vehicle roof photovoltaic assembly 101, for example, also includes an output harness 321, which is connected to the bus bars of each cell string of the photovoltaic cell array.

[0048] The vehicle-mounted photovoltaic power system of this application adopts different photovoltaic power system control modes based on different vehicle usage and operation scenarios, flexibly allocating photovoltaic power, thereby achieving efficient operation and utilization of the vehicle-mounted photovoltaic power system and fully utilizing the effectiveness of the vehicle-mounted photovoltaic power system. In addition, the vehicle-mounted photovoltaic modules of this application are stable and reliable, thus ensuring the safe and stable operation of the vehicle-mounted photovoltaic power system.

[0049] The basic concepts have been described above. It will be apparent to those skilled in the art that the above disclosures are merely illustrative and do not limit the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and amendments to the present application. Such modifications, improvements, and amendments are suggested in the present application and remain within the spirit and scope of the exemplary embodiments of the present application.

[0050] At the same time, this application uses specific terms to describe the embodiments of this application. For example, "one embodiment," "an embodiment," and / or "some embodiments" refer to a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that "one embodiment," "an embodiment," or "an alternative embodiment" mentioned twice or multiple times in different locations in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application may be appropriately combined.

[0051] Some aspects of the present application can be performed entirely by hardware, can be performed entirely by software (including firmware, resident software, microcode, etc.), or can be performed by a combination of hardware and software. The above hardware or software can all be referred to as "data blocks", "modules", "engines", "units", "components" or "systems". The processor can be one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DAPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors or combinations thereof. In addition, various aspects of the present application may be expressed as a computer product located in one or more computer-readable media, which includes computer-readable program code.

[0052] A computer-readable medium may include a propagated data signal embodying computer program code, for example, in baseband or as part of a carrier wave. The propagated signal may be in a variety of forms, including electromagnetic, optical, etc., or a suitable combination thereof. A computer-readable medium may be any computer-readable medium other than a computer-readable storage medium that can be connected to an instruction execution system, apparatus, or device to communicate, propagate, or transmit the program for use. The program code on the computer-readable medium may be transmitted via any suitable medium, including radio, cable, fiber optic cable, radio frequency signal, or similar medium, or any combination of the above.

[0053] Similarly, it should be noted that, in order to simplify the presentation of this application and thus facilitate understanding of one or more embodiments of the invention, the foregoing descriptions of the embodiments of this application sometimes combine multiple features into a single embodiment, figure, or description thereof. However, this disclosure method does not mean that the subject matter of this application requires more features than those recited in the claims. In fact, an embodiment may have fewer features than all of the features of a single embodiment disclosed above.

[0054] Although the present application has been described with reference to the current specific embodiments, ordinary technicians in this technical field should recognize that the above embodiments are only used to illustrate the present application, and various equivalent changes or substitutions can be made without departing from the spirit of the present application. Therefore, as long as the changes and modifications to the above embodiments are within the scope of the essential spirit of the present application, they will fall within the scope of the claims of the present application.

Claims

1. A vehicle top photovoltaic power system, comprising: A vehicle top photovoltaic module; A photovoltaic power control module, connected to the vehicle top photovoltaic module; A vehicle integrated control unit, connected to the photovoltaic power control module; An in-vehicle charging device, connected to the photovoltaic power control module; An in-vehicle battery, connected to the photovoltaic power control module; A vehicle power battery, connected to the in-vehicle charging device; The vehicle integrated control unit is configured to: When the vehicle top photovoltaic module meets the power generation conditions and the vehicle is in a traveling state, send a first system control instruction to the photovoltaic power control module; When the vehicle top photovoltaic module meets the power generation conditions and the vehicle is in a parked state, send a second system control instruction to the photovoltaic power control module; The photovoltaic power control module is configured to: Supply power to the in-vehicle battery based on the first system control instruction; based on the second system control instruction, charge the vehicle power battery through the in-vehicle charging device and disconnect the power supply to the in-vehicle battery.

2. The vehicle top photovoltaic power system according to claim 1, wherein, The photovoltaic power control module includes a main control unit, a photovoltaic inverter, and a voltage inverter that are connected to each other; The main control unit is connected to the vehicle integrated control unit; the photovoltaic inverter is connected to the vehicle top photovoltaic module; the photovoltaic inverter is also connected to the in-vehicle battery; the voltage inverter is connected to the in-vehicle charging device; The photovoltaic inverter is configured to output a DC voltage signal, and the voltage inverter is configured to output an AC voltage signal.

3. The vehicle top photovoltaic power system according to claim 2, wherein, It further includes an in-vehicle AC power supply interface; the in-vehicle AC power supply interface is connected to the voltage inverter; The photovoltaic power control module is further configured to: Supply power to the in-vehicle AC power supply interface based on the first system control instruction; based on the second system control instruction, disconnect the power supply to the in-vehicle AC power supply interface.

4. The vehicle top photovoltaic power system according to claim 2, wherein, It further includes a low-voltage load device; the low-voltage load device is connected to the photovoltaic inverter of the photovoltaic power control module; The photovoltaic power control module is further configured to: Supply power to the low-voltage load device based on the first system control instruction; based on the second system control instruction, disconnect the power supply to the low-voltage load device.

5. The vehicle top photovoltaic power system according to claim 4, wherein, The low-voltage load device is also connected to the in-vehicle battery to receive power supply from the in-vehicle battery.

6. The vehicle top photovoltaic power system according to claim 1, wherein, It further includes a DC-DC converter; the vehicle power battery is connected to the in-vehicle battery through the DC-DC converter.

7. The vehicle top photovoltaic power system according to claim 6, wherein, It further includes a low-voltage load device; the vehicle power battery is connected to the low-voltage load device through the DC-DC converter to supply power to the low-voltage load device.

8. The vehicle rooftop photovoltaic power system according to claim 1, wherein, the vehicle control unit is configured to: when the vehicle rooftop photovoltaic module does not meet the power generation condition, send a third system control instruction to the photovoltaic power control module; the photovoltaic power control module is configured to: disconnect the power supply to the vehicle-mounted battery based on the third system control instruction and stop charging the vehicle power battery through the vehicle-mounted charging device.

9. The vehicle rooftop photovoltaic power system according to claim 1, wherein, the vehicle rooftop photovoltaic module includes a curved vehicle rooftop photovoltaic module that fits the shape of the vehicle rooftop.

10. The vehicle rooftop photovoltaic power system according to claim 9, wherein, the curved vehicle rooftop photovoltaic module includes a curved glass, an encapsulation adhesive film, a photovoltaic cell array, and a curved backsheet; a first encapsulation adhesive film and a second encapsulation adhesive film are respectively arranged on both sides of the photovoltaic cell array, the curved glass is arranged above the first encapsulation adhesive film, and the curved backsheet is arranged below the second encapsulation adhesive film.

11. The vehicle rooftop photovoltaic power system according to claim 10, wherein, the material of the curved glass includes one or more of low-iron glass, white glass, tempered glass, and semi-tempered glass; the material of the curved backsheet includes one or more of low-iron glass, white glass, tempered glass, semi-tempered glass, low-emissivity glass, glass fiber reinforced resin, and carbon fiber reinforced epoxy resin.

12. The vehicle rooftop photovoltaic power system according to claim 10, wherein, the bonding surface between the curved glass and the first encapsulation adhesive film includes an anti-reflection coating, and the material of the anti-reflection coating includes acrylic polyurethane paint or silicate glass glaze; a hydrophobic film layer and an anti-reflection and anti-glare film layer are arranged on the light-receiving surface of the curved glass.

13. The vehicle rooftop photovoltaic power system according to claim 10, wherein, the photovoltaic cell array includes monocrystalline silicon, indium gallium selenide, cadmium telluride, perovskite, or perovskite tandem type photovoltaic cells.

14. The vehicle rooftop photovoltaic power system according to claim 10, wherein, the encapsulation adhesive film includes a high molecular polymer thermoplastic or thermosetting encapsulation adhesive film.

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