A lightweight vehicle-mounted photovoltaic module and its preparation method

Abstract

The present invention discloses a lightweight vehicle-mounted photovoltaic module and a method for preparing the same, relating to the technical field of vehicle-mounted photovoltaic modules. The lightweight vehicle-mounted photovoltaic module comprises a photovoltaic module body, which is mounted on the roof of a vehicle. A breathing valve is provided on the photovoltaic module body, through which water vapor in the installation gap between the photovoltaic module body and the roof can be discharged. The provision of the breathing valve allows for timely discharge of water vapor in the installation gap between the photovoltaic module body and the roof, thereby preventing excessive water vapor from affecting the service life of the photovoltaic module body.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-mounted photovoltaic modules, and in particular to a lightweight vehicle-mounted photovoltaic module and a preparation method thereof. Background Art

[0002] As new energy vehicles have obvious advantages over fuel vehicles with higher energy consumption in terms of environmental protection and economy, more and more vehicles are equipped with photovoltaic modules as their power source.

[0003] The bottom of the existing photovoltaic module body is mostly fixed to the roof with double-sided adhesive tape. The double-sided adhesive tape on all four sides is distributed in a continuous rectangular shape, and there is no gap at the connection between two adjacent double-sided adhesive tapes. However, this installation method results in an installation gap between the photovoltaic module body and the roof, and residual air is trapped in this space. The photovoltaic module body generates heat during operation. Especially in the summer, the roof temperature can reach 80-120°C. The moisture in the installation gap evaporates due to the heat to form water vapor. Due to the lack of an effective exhaust channel, the accumulation of vapor causes the surface of the module to expand and the roof to deform. In severe cases, it can even cause damage to the internal cells and circuits, ultimately causing permanent failure of the photovoltaic module body.

[0004] To address this issue, double-sided adhesive tape can be fitted with ventilation gaps at each of the four corners of the roof to allow for the release of water vapor from the installation gap. However, when the moisture in the installation gap heats up and forms water vapor, it adheres to dust and other impurities, forming a highly adhesive mixture. When air circulates through the installation gap, this mixture adheres to the gap between adjacent double-sided adhesive tape strips. Over time, this gap can become clogged, rendering the water vapor ineffective.

[0005] Therefore, there is an urgent need in the art for a new type of lightweight vehicle-mounted photovoltaic module and a preparation method thereof to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a lightweight vehicle-mounted photovoltaic module and its preparation method to solve the problems existing in the above-mentioned prior art. It can effectively discharge water vapor in the installation gap between the photovoltaic module body and the roof, thereby extending the service life of the photovoltaic module body.

[0007] To achieve the above object, the present invention provides the following solutions:

[0008] The present invention discloses a lightweight vehicle-mounted photovoltaic module, comprising a photovoltaic module body, which is adhesively fixed to the roof of a vehicle, and an installation gap is formed between the photovoltaic module body and the roof; the photovoltaic module body is provided with a breathing valve, and water vapor in the installation gap between the photovoltaic module body and the roof can be discharged through the breathing valve.

[0009] Preferably, the photovoltaic module body includes a photovoltaic panel, a first packaging layer, a solar cell array, a second packaging layer and a photovoltaic backplane stacked in sequence; the outer dimensions of the photovoltaic panel, the first packaging layer, the second packaging layer and the photovoltaic backplane are larger than the outer dimensions of the solar cell array, and the solar cell array is located in the central area of ​​the photovoltaic module body.

[0010] Preferably, the photovoltaic panel is a transparent PVF film, ETFE film or PET film;

[0011] The photovoltaic backsheet is a PET polymer sheet;

[0012] The first encapsulation layer and the second encapsulation layer are made of EVA or polyvinyl acetate.

[0013] Preferably, the roof is a planar structure; or, a mounting groove is provided on the roof, and the breathing valve can be installed in the mounting groove.

[0014] Preferably, the photovoltaic component body is fixed to the roof by double-sided adhesive tape. Four double-sided adhesive tapes are provided. The four double-sided adhesive tapes are respectively parallel to the four sides of the photovoltaic back panel. All the double-sided adhesive tapes can form a rectangle.

[0015] Preferably, the breathing valve is a one-way valve, and the one-way valve is a film check valve, a lifting check valve, a butterfly check valve or a double-flap check valve.

[0016] Preferably, the breathing valve includes a first valve body, a plurality of first air vents are provided on the bottom surface of the first valve body, a first limit plate is fixed to the upper end of the first valve body, a first cavity is provided in the first valve body, a first film is provided in the first cavity, a first outer flange is provided at the upper end of the outer side of the first valve body, the first outer flange is fixed on the photovoltaic component body, and all of the first air vents are connected to the installation gap.

[0017] Preferably, the breathing valve includes a second valve body, a valve body bottom plug is installed at the bottom of the second valve body, a plurality of second air vents are provided on the valve body bottom plug, a second limit plate is provided at the upper end of the second valve body, a second film is provided inside the second valve body, the second film is part of the photovoltaic panel, a plurality of valve body notches are provided on the side wall of the second valve body, a second outer flange is provided at the outer upper end of the second valve body, the second outer flange is fixed on the photovoltaic panel, and all of the second air vents are connected to the installation gap.

[0018] The present invention discloses a method for manufacturing a lightweight vehicle-mounted photovoltaic module, comprising the following steps:

[0019] S1, stacking: stacking the photovoltaic panel, the first encapsulation layer, the solar cell array, the second encapsulation layer and the photovoltaic backsheet in sequence;

[0020] S2. Lamination: Place the photovoltaic module body in a laminator, set the lamination temperature to 140-150° C., vacuum time to 6-7 minutes, and press down to -30 to -10 kPa after vacuum, perform lamination, and solidify the first encapsulation layer and the second encapsulation layer to form the photovoltaic module body;

[0021] S3. Drilling: Mark the installation position of the breathing valve on the edge area of ​​the photovoltaic module body, and use laser cutting to drill a first through hole. The diameter of the first through hole is adapted to the outer diameter of the first valve body.

[0022] S4. Integrating a breathing valve: applying glue on the lower surface of the first outer flange of the breathing valve, embedding the breathing valve into the first through hole, and obtaining the lightweight vehicle-mounted photovoltaic module after the glue is cured.

[0023] The present invention discloses a method for manufacturing a lightweight vehicle-mounted photovoltaic module, comprising the following steps:

[0024] S1. Drilling: Mark the installation position of the breathing valve on the edge areas of the first encapsulation layer, the second encapsulation layer, and the photovoltaic backsheet, and use a laser cutting process to drill a second through hole. The diameter of the second through hole is adapted to the outer diameter of the second valve body.

[0025] S2, stacking: stacking the photovoltaic panel, the first encapsulation layer, the solar cell array, the second encapsulation layer and the photovoltaic backsheet in sequence;

[0026] S3. Lamination: Place the photovoltaic module body in a laminator, set the lamination temperature to 140-150° C., vacuum time to 6-7 minutes, and press down to -30 to -10 kPa after vacuum, perform lamination, and solidify the first encapsulation layer and the second encapsulation layer to form the photovoltaic module body;

[0027] S4. Forming a guide groove: Marking the installation position of the breathing valve on the photovoltaic panel, and using a laser cutting process to form a guide groove on the photovoltaic panel. The shape and size of the guide groove are adapted to the shape of the cylindrical wall of the second valve body;

[0028] S5. Integrated breathing valve: Apply glue to the lower surface of the second outer flange of the breathing valve, align it with the guide groove, embed the second valve body into the photovoltaic module body, and then insert the valve body bottom plug into the second valve body. After the glue is cured, the lightweight vehicle-mounted photovoltaic module is obtained.

[0029] Compared with the prior art, the present invention has achieved the following technical effects:

[0030] The present invention installs a breathing valve on the lightweight vehicle-mounted photovoltaic module. The setting of the breathing valve can effectively discharge water vapor in the installation gap between the photovoltaic module body and the vehicle roof.

[0031] Furthermore, because the breathing valve is a one-way valve, it ensures a dynamic balance between the installation gap and the external air pressure, quickly dissipates heat, and blocks external liquid infiltration, significantly extending the service life of the PV module under high-temperature conditions. Secondly, the breathing valve is installed away from the PV module body, effectively preventing the risk of mechanical damage to the solar cell array during the PV module body drilling process, thereby ensuring the product yield of the PV module body.

[0032] Furthermore, the breathing valve is a film check valve with a lightweight structure, and the integrated photovoltaic module body can meet the vehicle's lightweight requirements for on-board photovoltaic modules.

[0033] Furthermore, the integration method of the integrated breathing valve is simple, and it is highly compatible with the existing photovoltaic module production line. There is no need to upgrade or modify the equipment, it is easy to manufacture, and it saves time to install. The split breathing valve uses a part of the photovoltaic panel in the photovoltaic module body as the second film of the second valve body. The second film located in the second cavity is connected to the photovoltaic panel of the photovoltaic module body as a whole, providing good support for the second film in the second cavity, which can effectively prevent the second film from detaching from the second cavity, thereby improving the stability of the breathing valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 This is a diagram showing the positional relationship between the lightweight vehicle-mounted photovoltaic assembly and the vehicle according to Example 1;

[0036] Figure 2 A side view of a double-sided adhesive tape installed in a lightweight vehicle-mounted photovoltaic module according to Example 1;

[0037] Figure 3 This is a schematic structural diagram of a main body of a photovoltaic assembly in a lightweight vehicle-mounted photovoltaic assembly according to Example 1;

[0038] Figure 4 This is a top view of a lightweight vehicle-mounted photovoltaic assembly according to Example 1;

[0039] Figure 5 This is a schematic diagram of a breathing valve in a lightweight vehicle-mounted photovoltaic assembly in Example 1 when it is in an open state;

[0040] Figure 6 This is a schematic diagram of a breathing valve in a lightweight vehicle-mounted photovoltaic assembly in a closed state according to Example 1;

[0041] Figure 7 This is a schematic diagram of a breathing valve in an open state in a lightweight vehicle-mounted photovoltaic assembly according to Example 2;

[0042] Figure 8 This is an exploded view of the breathing valve in the lightweight vehicle-mounted photovoltaic assembly of Example 2 when it is in an open state;

[0043] Figure 9 This is a schematic diagram of a breathing valve in a lightweight vehicle-mounted photovoltaic assembly according to Example 2 when the breathing valve is in a closed state;

[0044] Figure 10 This is an exploded view of the breathing valve in the lightweight vehicle-mounted photovoltaic assembly of Example 2 when it is in a closed state;

[0045] Figure 11 This is a schematic diagram of the second film in the lightweight vehicle-mounted photovoltaic module according to Example 2;

[0046] Figure 12 This is a schematic structural diagram of the second valve body in the lightweight vehicle-mounted photovoltaic assembly according to the second embodiment;

[0047] Figure 13 This is a schematic structural diagram of the second limiting plate in the lightweight vehicle-mounted photovoltaic assembly according to the second embodiment;

[0048] Figure 14 This is a schematic structural diagram of a valve body bottom plug in a lightweight vehicle-mounted photovoltaic assembly according to Example 2;

[0049] In the figure: 100-photovoltaic module body; 101-photovoltaic panel; 102-first packaging layer; 103-solar cell array; 104-second packaging layer; 105-photovoltaic backboard; 200-breathing valve; 201-first valve body; 202-first film; 203-first vent; 204-first limiting plate; 205-bottom surface of valve body; 206-first outer flange; 207-second valve body; 208-valve body bottom plug; 209-second film; 210-second limiting plate; 211-second outer flange; 212-valve body notch; 213-second vent; 300-roof; 400-double-sided adhesive tape. DETAILED DESCRIPTION

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0051] The purpose of the present invention is to provide a lightweight vehicle-mounted photovoltaic module and its preparation method to solve the problems existing in the above-mentioned prior art. It can effectively discharge water vapor in the installation gap between the photovoltaic module body and the roof, thereby extending the service life of the photovoltaic module body.

[0052] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0053] Example 1

[0054] like Figures 1-6 As shown, this embodiment provides a lightweight vehicle-mounted photovoltaic module, including a photovoltaic module body 100, which is adhesively fixed to the vehicle roof 300. The photovoltaic module body 100 has a rectangular structure, and the space between the photovoltaic module body 100 and the roof 300 is the installation gap. The photovoltaic module body 100 is provided with a breathing valve 200, through which water vapor in the installation gap between the photovoltaic module body 100 and the groove bottom of the roof 300 can be discharged.

[0055] In actual use, by setting the breathing valve 200, the installation gap between the photovoltaic module body 100 and the roof 300 is connected to the outside world, so that the internal water vapor can be discharged in time while preventing external rainwater from entering the installation gap and avoiding it affecting the service life of the photovoltaic module body 100.

[0056] In this embodiment, if Figure 3 As shown, the photovoltaic module body 100 includes a photovoltaic panel 101, a first encapsulation layer 102, a solar cell array 103, a second encapsulation layer 104 and a photovoltaic backsheet 105 stacked in sequence. The outer dimensions of the photovoltaic panel 101, the first encapsulation layer 102, the second encapsulation layer 104 and the photovoltaic backsheet 105 are all larger than the outer dimensions of the solar cell array 103, and the solar cell array 103 is located in the central area of ​​the photovoltaic module body 100. The solar cell array 103 is composed of a plurality of cells arranged in an array, and the cells are connected to each other. This is a prior art and will not be described in detail. Of course, this five-layer structure is a common flexible photovoltaic module structure. If other functions need to be given to it, other layer structures can be added on this basis.

[0057] The breathing valve 200 is arranged at the edge of the photovoltaic module body 100. Specifically, the distance between the breathing valve 200 and the solar cell array 103 is at least 6.4 mm. The purpose of this setting is to effectively avoid mechanical damage to the solar cell array 103 during the hole opening process of the photovoltaic module body 100, thereby ensuring the product yield of the photovoltaic module body 100.

[0058] In this embodiment, the photovoltaic panel 101 is any one of a translucent PVF film, an ETFE film, or a PET film. The photovoltaic panel 101 is translucent, so that sunlight can pass through the photovoltaic panel 101 .

[0059] The photovoltaic backsheet 105 is a PET polymer sheet.

[0060] The first encapsulation layer 102 and the second encapsulation layer 104 are made of EVA or polyvinyl acetate.

[0061] In this embodiment, the roof 300 is a common planar structure. The photovoltaic module body 100 is arranged parallel to the roof 300 , and an installation gap is formed between the lower surface of the photovoltaic module body 100 and the upper surface of the roof 300 .

[0062] Alternatively, a rectangular mounting groove is provided on the roof 300, such as Figure 1-Figure 2 As shown, the breathing valve 200 can be installed in the installation groove, and the upper surface of the photovoltaic component body 100 is flush with the upper surface of the roof 300, thereby improving the aesthetics of the vehicle body.

[0063] In this embodiment, the photovoltaic back panel 105 is fixed to the bottom of the mounting groove on the roof 300 by means of double-sided adhesive tape 400. Specifically, four double-sided adhesive tapes 400 may be provided, and the four double-sided adhesive tapes 400 are respectively parallel to the four sides of the photovoltaic back panel 105, that is, the four double-sided adhesive tapes 400 can enclose a rectangular mounting gap.

[0064] In this embodiment, the breathing valve 200 is a one-way valve. The purpose of using a one-way valve is to allow water vapor in the installation gap between the photovoltaic component body 100 and the bottom of the installation groove on the roof 300 to flow only outward, while external gas or water will not flow into the installation gap through the breathing valve 200.

[0065] The one-way valve (i.e., the breathing valve 200) can be any one of the existing film check valve, lift check valve, butterfly check valve, or double-flap check valve. Of course, those skilled in the art can also select other one-way control structures according to actual needs, and are not limited to this one.

[0066] In this embodiment, the breathing valve 200 is a film check valve, and its specific structure and working process are as follows: Figure 5-Figure 6 As shown, the breathing valve 200 includes a first valve body 201, which is a basin-shaped structure with an open upper end and a closed lower end. The lower closed surface of the first valve body 201 is the valve body bottom surface 205, and a plurality of first air vents 203 are provided on the valve body bottom surface 205 of the first valve body 201. The lower ends of the first air vents 203 are connected to the installation gap. A first limit plate 204 is fixed to the upper end of the first valve body 201. The first limit plate 204 can be a rectangular plate integrally formed with the first valve body 201, and the first limit plate 204 is fixed at the central position of the circular opening at the upper end of the first cavity. A first cavity is provided in the first valve body 201, and the lower end of the first cavity is connected to the installation gap through the first air vents 203, and the upper end of the first cavity is connected to the outside world through the upper end opening of the first valve body 201. A first film 202 is disposed within the first cavity. The first film 202 can be any existing plastic film that is impermeable, UV-resistant, and capable of being pushed under vapor pressure. The size and shape of the first film 202 match the valve body bottom surface 205. The first cavity is tapered, meaning its internal cross-sectional dimensions gradually decrease from top to bottom. This allows the first film 202 to rest smoothly on the valve body bottom surface 205 within the tapered first cavity and block all first vent holes 203, without allowing water vapor to escape. An annular first outer flange 206 is provided at the outer upper end of the first valve body 201. The lower surface of the first outer flange 206 can be glued and fixed to the upper surface of the photovoltaic module body 100. The lower ends of all first vent holes 203 communicate with the mounting gap.

[0067] When the moisture in the installation gap is converted into water vapor due to high temperature environment, Figure 5 As shown, the pressure of the water vapor in the installation gap is greater than the external atmospheric pressure, thereby lifting the first film 202, and the first film 202 moves upward until it contacts the lower end of the first limit plate 204. At this time, the first vent 203 is in an open state, and the water vapor in the installation gap flows into the outside through the first vent 203. When it rains outside or the external air pressure is greater than the air pressure in the installation gap, Figure 6 As shown, external rainwater or air pressure will push the first film 202 to move downward. Due to the taper in the first cavity, the first film 202 can slide smoothly along the inner wall of the first cavity to the bottom surface 205 of the valve body, and can block all the first air holes 203, so that each first air hole 203 is in a closed state. At this time, the inside and outside of the first valve body 201 do not circulate with each other, and external rainwater or other impurities cannot enter the installation gap.

[0068] Example 2

[0069] like Figure 7-14As shown, this embodiment provides a lightweight vehicle-mounted photovoltaic assembly. The technical features provided by this embodiment are basically the same as those disclosed in Example 1. The difference is that the structures of the breathing valves 200 of the two are different, as follows:

[0070] In this embodiment, the breathing valve 200 includes a second valve body 207, such as Figure 12 As shown, the second valve body 207 is a cylindrical structure with upper and lower openings. A valve body bottom plug 208 is installed at the bottom of the second valve body 207. Figure 14 As shown, the valve body bottom plug 208 is a cylindrical structure. The valve body bottom plug 208 is plugged and fixed to the lower end of the second valve body 207. The valve body bottom plug 208 is provided with a plurality of second vent holes 213. Each second vent hole 213 is distributed on both sides of the valve body bottom plug 208, and each second vent hole 213 on each side is distributed in an arc shape. The second vent holes 213 can also be distributed on the valve body bottom plug 208 in other shapes. A second limit plate 210 is provided at the upper end of the second valve body 207. The second limit plate 210 can be integrally formed with the second valve body 207, or connected to the second valve body 207 by means of a snap connection or adhesive. The lower end of the second limit plate 210 is provided with a limit protrusion. The lower end of the limit protrusion can abut the center of the second film 209, so that the center of the second film 209 does not move up and down. The second film 209 is provided inside the second valve body 207. It should be noted that the second film 209 is a part of the photovoltaic panel 101, that is, the second film 209 located in the second valve body 207 is integrally connected to the photovoltaic panel 101 in the photovoltaic module body 100, providing a good support force for the second film 209 in the second valve body 207, which can effectively prevent the second film 209 from detaching from the cavity in the second valve body 207, thereby improving the working stability of the breathing valve 200. Figure 11-14 The sidewall of the second valve body 207 is provided with several valve body notches 212, specifically two opposed notches 212. These notches 212 allow the photovoltaic panel 101 outside the second valve body 207 to be connected to the photovoltaic panel 101 inside (i.e., the second film 209) as a single unit. An annular second outer flange 211 is provided at the upper outer end of the second valve body 207. The lower surface of the second outer flange 211 can be glued to the upper surface of the photovoltaic panel 101. The lower ends of all second vent holes 213 communicate with the mounting gap.

[0071] When the moisture in the installation gap is converted into water vapor due to high temperature environment, Figure 7 、 Figure 8As shown, the water vapor pressure in the installation gap is greater than the external atmospheric pressure, thereby pushing up the two sides of the second film 209. Since the second film 209 is integrally connected to the photovoltaic panel 101 and the limiting effect of the limiting protrusion of the second limiting plate 210, the central part of the second film 209 will not move upward, while the two sides of the second film 209 will move upward, as shown in FIG. Figure 7-Figure 8 As shown, the second vent hole 213 is in an open state, and the water vapor at the installation gap flows into the outside through the second vent hole 213. When it rains outside or the outside air pressure is greater than the air pressure at the installation gap, Figure 9-10 As shown, external rainwater or air pressure will push the two sides of the second film 209 to move downward until the second film 209 is in a horizontal state with the photovoltaic panel 101, and can block all the second air vents 213, so that each second air vent 213 is in a closed state. At this time, the inside and outside of the second valve body 207 do not circulate with each other, and external rainwater or other impurities cannot enter the installation gap.

[0072] Example 3

[0073] This embodiment provides a method for manufacturing a lightweight vehicle-mounted photovoltaic module, which is used to prepare the lightweight vehicle-mounted photovoltaic module disclosed in Example 1, comprising the following steps:

[0074] S1. Stacking: The photovoltaic panel 101, the first packaging layer 102, the solar cell array 103, the second packaging layer 104 and the photovoltaic backsheet 105 are stacked in sequence. The outer dimensions of the photovoltaic panel 101, the first packaging layer 102, the second packaging layer 104 and the photovoltaic backsheet 105 are larger than the dimensions of the solar cell array 103. The solar cell array 103 is located at the center of the photovoltaic module body 100 so that the breathing valve 200 can be integrated in the edge area of ​​the photovoltaic module body 100.

[0075] S2. Lamination: Place the photovoltaic module body 100 into a laminator, set the lamination temperature to 140-150°C, the vacuum time to 6-7 minutes, and the downward pressure after vacuum to -30 to -10 KPa, perform lamination, solidify the first encapsulation layer 102 and the second encapsulation layer 104, and form the photovoltaic module body 100.

[0076] S3. Drilling: Mark the installation position of the breathing valve 200 on the edge area of ​​the photovoltaic module body 100 (no less than 6.4 mm away from the solar cell array 103), and use laser cutting to drill a first through hole. The aperture of the first through hole is adapted to the outer diameter of the first valve body 201.

[0077] S4. Integrate the breathing valve 200: Apply glue on the lower surface of the first outer flange 206 of the breathing valve 200, embed the breathing valve 200 into the first through hole, and after the glue is cured, a lightweight vehicle-mounted photovoltaic module is obtained.

[0078] Example 4

[0079] This embodiment provides a method for manufacturing a lightweight vehicle-mounted photovoltaic module, which is used to prepare the lightweight vehicle-mounted photovoltaic module disclosed in Example 2, and includes the following steps:

[0080] S1. Drilling: Mark the installation position of the breathing valve 200 on the edge area of ​​the first encapsulation layer 102, the second encapsulation layer 104 and the photovoltaic backsheet 105, and use a laser cutting process to drill a second through hole. The aperture of the second through hole is adapted to the outer diameter of the second valve body 207.

[0081] S2. Stacking: The photovoltaic panel 101, the first packaging layer 102, the solar cell array 103, the second packaging layer 104 and the photovoltaic backsheet 105 are stacked in sequence. The outer dimensions of the photovoltaic panel 101, the first packaging layer 102, the second packaging layer 104 and the photovoltaic backsheet 105 are larger than the dimensions of the solar cell array 103. The solar cell array 103 is located at the center of the photovoltaic module body 100 so that the breathing valve 200 can be integrated in the edge area of ​​the photovoltaic module body 100.

[0082] S3. Lamination: Place the photovoltaic module body 100 into a laminator, set the lamination temperature to 140-150°C, the vacuum time to 6-7 minutes, and the downward pressure after vacuum to -30 to -10 KPa, perform lamination, solidify the first encapsulation layer 102 and the second encapsulation layer 104, and form the photovoltaic module body 100.

[0083] S4, opening a guide groove: mark the installation position of the breathing valve 200 on the photovoltaic panel 101, and use laser cutting technology to open a guide groove on the photovoltaic panel 101, such as Figure 13 As shown, the shape and size of the guide groove are adapted to the shape of the cylinder wall of the second valve body 207 .

[0084] S5. Integrated breathing valve 200: Apply glue to the lower surface of the second outer flange 211 of the breathing valve 200, align it with the guide groove, embed the second valve body 207 into the photovoltaic module body 100, and then insert the valve body bottom plug 208 into the second valve body 207. After the glue is cured, a lightweight vehicle-mounted photovoltaic module is obtained.

[0085] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0086] In the description of the present invention, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; they may refer to mechanical or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application.

[0087] If the present invention discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by integral molding using a casting process) (except where it is obviously not possible to use an integrated molding process).

[0088] In addition, unless otherwise stated, the terms used in any technical solution disclosed in the present invention to express positional relationships or shapes include states or shapes that are approximate, similar, or close thereto.

[0089] Any component provided by the present invention may be assembled from multiple separate components, or may be a separate component manufactured by an integral molding process.

[0090] It should be noted that the structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the conditions under which the present invention can be implemented. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose that can be achieved by the present invention.

[0091] It should also be noted that in the embodiments of the present application, the same figure mark represents the same component or the same part.

[0092] Adaptive changes based on actual needs are all within the scope of protection of the present invention.

[0093] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A lightweight vehicle-mounted photovoltaic module, characterized by: The photovoltaic module body (100) is adhesively fixed to a vehicle roof (300), and an installation gap is formed between the photovoltaic module body (100) and the vehicle roof (300); the photovoltaic module body (100) is provided with a breathing valve (200), and water vapor in the installation gap between the photovoltaic module body (100) and the vehicle roof (300) can be discharged through the breathing valve (200); The breathing valve (200) includes a second valve body (207), a valve body bottom plug (208) is installed at the bottom of the second valve body (207), a plurality of second vent holes (213) are provided on the valve body bottom plug (208), a second limit plate (210) is provided at the upper end of the second valve body (207), a second film (209) is provided inside the second valve body (207), the photovoltaic module body (100) includes a photovoltaic panel (101), and the second film (209) is a part of the photovoltaic panel (101). The side wall of the second valve body (207) is provided with a plurality of valve body notches (212), and the valve body notches (212) allow the photovoltaic panel (101) outside the second valve body (207) and the second film (209) inside the second valve body (207) to be connected as a whole. The upper end of the outer side of the second valve body (207) is provided with a second outer flange (211), and the second outer flange (211) is fixed on the photovoltaic panel (101), and all the second vent holes (213) are connected to the installation gap.

2. The lightweight vehicle-mounted photovoltaic assembly according to claim 1, characterized in that: The photovoltaic module body (100) further comprises a first encapsulation layer (102), a solar cell array (103), a second encapsulation layer (104) and a photovoltaic backsheet (105) stacked in sequence; the outer dimensions of the photovoltaic panel (101), the first encapsulation layer (102), the second encapsulation layer (104) and the photovoltaic backsheet (105) are larger than the outer dimensions of the solar cell array (103), and the solar cell array (103) is located in the central area of ​​the photovoltaic module body (100).

3. The lightweight vehicle-mounted photovoltaic assembly according to claim 2, characterized in that: The photovoltaic panel (101) is a transparent PVF film, ETFE film or PET film; The photovoltaic backsheet (105) is a PET polymer sheet; The first encapsulation layer (102) and the second encapsulation layer (104) are made of EVA or polyvinyl acetate.

4. The lightweight vehicle-mounted photovoltaic assembly according to claim 2, characterized in that: The vehicle roof (300) is a planar structure; or, the vehicle roof (300) is provided with a mounting groove, and the breathing valve (200) can be mounted in the mounting groove.

5. The lightweight vehicle-mounted photovoltaic assembly according to claim 4, characterized in that: The photovoltaic assembly body (100) is fixed to the vehicle roof (300) by bonding with double-sided adhesive tapes. Four double-sided adhesive tapes (400) are provided. The four double-sided adhesive tapes (400) are respectively parallel to the four sides of the photovoltaic backboard (105). All the double-sided adhesive tapes (400) can form a rectangle.

6. The lightweight vehicle-mounted photovoltaic assembly according to claim 1, characterized in that: The breathing valve (200) is a one-way valve, which is a film check valve, a lifting check valve, a butterfly check valve or a double-flap check valve.

7. A method for manufacturing a lightweight vehicle-mounted photovoltaic module, characterized in that: The lightweight vehicle-mounted photovoltaic assembly according to claim 2 comprises the following steps: S1, opening a hole: marking the installation position of the breathing valve (200) on the edge areas of the first encapsulation layer (102), the second encapsulation layer (104) and the photovoltaic backsheet (105), and opening a second through hole using a laser cutting process, wherein the aperture of the second through hole is adapted to the outer diameter of the second valve body (207); S2, stacking: stacking the photovoltaic panel (101), the first encapsulation layer (102), the solar cell array (103), the second encapsulation layer (104), and the photovoltaic backsheet (105) in sequence; S3, lamination: placing the photovoltaic module body (100) into a laminator, setting the lamination temperature to 140-150°C, the vacuum time to 6-7 minutes, the downward pressure after vacuum to -30 to -10 KPa, laminating, curing the first encapsulation layer (102) and the second encapsulation layer (104), and forming the photovoltaic module body (100); S4. Opening a guide groove: marking the installation position of the breathing valve (200) on the photovoltaic panel (101), and using a laser cutting process to open a guide groove on the photovoltaic panel (101), wherein the shape and size of the guide groove are adapted to the shape of the cylindrical wall of the second valve body (207); S5, integrated breathing valve (200): apply glue to the lower surface of the second outer flange (211) of the breathing valve (200), align with the guide groove, embed the second valve body (207) into the photovoltaic module body (100), and then insert the valve body bottom plug (208) into the second valve body (207). After the glue is cured, the lightweight vehicle-mounted photovoltaic module is obtained.

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