Waterproof adhesive tape for photovoltaic module and photovoltaic module

Abstract

According to the water-blocking adhesive tape for the photovoltaic module and the photovoltaic module, two easy-to-bend parts are arranged on one side, deviating from a bonding layer, of a base material layer, and the two easy-to-bend parts are easy to bend when stressed; therefore, after being bent at the easy-to-bend parts along the two opposite sides of the water-blocking adhesive tape for the photovoltaic module in the width direction, the water-blocking adhesive tape can be respectively attached and fixed on the front surface and the back surface of the module body. After the two opposite sides of the water-blocking adhesive tape for the photovoltaic module are attached to the front face and the back face of the module body, the two opposite sides of the water-blocking adhesive tape for the photovoltaic module can be stably attached to the front face and the back face of the module body due to the fact that the springback stress of the easy-to-bend part is weak, the attaching tightness is high, and the service life of the water-blocking adhesive tape for the photovoltaic module is prolonged. Therefore, a gap can be prevented from being generated between the water-blocking adhesive tape for the photovoltaic module and the module body, and invasion of water vapor can be effectively blocked. In addition, in the long-term outdoor use process, the defect of debonding can be effectively prevented, and normal water blocking can be achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of photovoltaic technology, in particular to a water-blocking tape for photovoltaic modules and a photovoltaic module. BACKGROUND

[0002] During long-term outdoor use of the photovoltaic module, water vapor will gradually penetrate from the gap at the edge of the photovoltaic module into the interior of the photovoltaic module, which can easily cause corrosion of the battery piece or lead to delamination of the photovoltaic module, and ultimately cause power attenuation of the photovoltaic module. In order to solve the above problems, the market has launched a water-blocking tape for photovoltaic modules, which is also referred to as a water-blocking tape. The water-blocking tape is usually attached to the four edges of the photovoltaic module to block water vapor from entering the interior of the photovoltaic module. The water-blocking tape in the related art usually includes a substrate layer, an adhesive layer and a release layer which are sequentially stacked from bottom to top. However, during long-term outdoor use, the water-blocking tape is prone to debonding defects and cannot effectively block water. CONTENT OF THE UTILITY MODEL

[0003] Therefore, it is necessary to overcome the defects of the prior art and provide a water-blocking tape for photovoltaic modules and a photovoltaic module, which can effectively prevent debonding defects during long-term outdoor use and can normally block water.

[0004] A water-blocking tape for photovoltaic modules, the water-blocking tape for photovoltaic modules comprising: a substrate layer, an adhesive layer and a release layer which are sequentially stacked; two easy-to-bend portions are provided on the side of the substrate layer away from the adhesive layer, the two easy-to-bend portions are arranged in parallel and spaced apart along the width direction of the substrate layer, and each easy-to-bend portion is arranged in extension along the length direction of the substrate layer.

[0005] In one embodiment, the thickness of the easy-to-bend portion is less than the thickness of the portion outside the easy-to-bend portion on the substrate layer.

[0006] In one embodiment, the easy-to-bend portion is provided with one or more combinations of cracks, grooves and intermittent holes.

[0007] In one embodiment, the groove is a V-shaped groove.

[0008] In one embodiment, the two groove walls of the V-shaped groove are arranged at an acute angle.

[0009] In one embodiment, the thickness of the substrate layer is 20-30 μm, the thickness of the adhesive layer is 30-40 μm, and the thickness of the release layer is 20-30 μm.

[0010] A photovoltaic module comprises the water-blocking tape for photovoltaic module and further comprises a module body, and the adhesive layer is attached to the edge of the module body on the side away from the substrate layer.

[0011] In one embodiment, the distance between the central axes of the two bendable sections is S, and the thickness of the module body is d, and 0.95d≤S≤1.05d.

[0012] In one embodiment, the water-blocking tape for photovoltaic module comprises a main body and two connecting sections respectively located on the opposite sides of the main body, the opposite sides of the main body are respectively connected to the two connecting sections, the bendable sections are arranged between the main body and the connecting sections, the main body is connected to the side wall of the module body, and the two connecting sections are respectively connected to the front surface and the back surface of the module body.

[0013] In one embodiment, the water-blocking tape for photovoltaic module is arranged around the circumference of the module body.

[0014] In the above water-blocking tape for photovoltaic module and photovoltaic module, the release layer is removed during use, and the adhesive layer is attached to the edge of the module body on the side away from the substrate layer. Since the substrate layer on the side away from the adhesive layer is provided with two bendable sections, the two bendable sections are easily bent under stress. Thus, after the water-blocking tape for photovoltaic module is bent on the opposite sides along the width direction at the bendable sections, the opposite sides can be respectively attached to the front surface and the back surface of the module body. After the opposite sides of the water-blocking tape for photovoltaic module are attached to the front surface and the back surface of the module body, the rebound stress of the bendable sections is weak, so that the opposite sides of the water-blocking tape for photovoltaic module can be stably attached to the front surface and the back surface of the module body, and the attachment tightness is high, thereby preventing the water-blocking tape for photovoltaic module and the module body from being separated, and effectively preventing water vapor from entering. In addition, during long-term outdoor use, the water-blocking tape can effectively prevent the occurrence of debonding defects and can normally block water. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 FIG. 1 is a structural diagram of a water-blocking tape before being attached to a module body in the related art.

[0016] Figure 2 FIG. 2 is a structural diagram of a water-blocking tape attached to a module body in the related art.

[0017] Figure 3 FIG. 3 is a structural diagram of a water-blocking tape when being loosened in the related art.

[0018] Figure 4 FIG. 4 is a structural diagram of a water-blocking tape for photovoltaic module according to one embodiment of the present application.

[0019] Figure 5 A structure diagram of a water-blocking adhesive tape for a photovoltaic module before being attached to a module body according to an embodiment of the present application.

[0020] Figure 6 A structure diagram of a water-blocking adhesive tape for a photovoltaic module attached to a module body according to an embodiment of the present application.

[0021] 110, water-blocking adhesive tape; 120, module body;

[0022] 210, water-blocking adhesive tape for a photovoltaic module; 211, substrate layer; 2111, easy-bending part; 2112, groove wall; 212, adhesive layer; 213, release layer; 214, main body part; 215, connecting part; 220, module body; 221, first panel; 222, first adhesive film; 223, cell; 224, second adhesive film; 225, second panel. DETAILED DESCRIPTION

[0023] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of ways other than those specifically described herein, and the present application is not limited to the embodiments described herein as long as they do not depart from the scope of the present application.

[0024] As described in the background, in the prior art, the water-blocking adhesive tape is prone to debonding defects during long-term outdoor use, and it is difficult to effectively block water. The inventors have found that the reason for this problem is that the water-blocking adhesive tape is too hard, and it is difficult to bend during assembly, which leads to poor adhesion to the front and back of the module body. Furthermore, it is prone to gaps after being attached or after being used for a period of time, as shown in Figures 1 to 3 , Figure 1 A structure diagram of a water-blocking adhesive tape 110 in the related art is shown, which is ready to be attached to the four peripheral edges of a module body 120. Figure 2 A structure diagram of a water-blocking adhesive tape 110 attached to the four peripheral edges of a module body 120 is shown. Figure 3 A structure diagram of a water-blocking adhesive tape 110 is shown, which is prone to loosening and has a gap with a module body 120 after being used for a period of time. The water-blocking adhesive tape 110 in the related art is too hard, which makes it difficult to bend during assembly, and thus it has poor adhesion to the front and back of the module body 120. Furthermore, it is prone to gaps when being attached or after being used for a period of time, as shown in Figure 3 Once a gap is generated, water vapor is easily infiltrated into the interior of the module body 120, and the water-blocking effect is greatly reduced, which is difficult to resist the erosion of water vapor during long-term outdoor use.

[0025] Based on the above reasons, the application provides a waterproof adhesive tape for photovoltaic modules and a photovoltaic module, which can effectively prevent the occurrence of debonding defects during long-term outdoor use and can normally prevent water.

[0026] Referring to Figures 4 to 6 In an embodiment, a waterproof adhesive tape 210 for photovoltaic modules is provided, which comprises a substrate layer 211, an adhesive layer 212 and a release layer 213 arranged in sequence. Two easy-bending parts 2111 are arranged on the side of the substrate layer 211 away from the adhesive layer 212. The two easy-bending parts 2111 are arranged in parallel along the width direction of the substrate layer 211. The width direction of the substrate layer 211 is indicated by the double-headed arrow W in the figure. In addition, each easy-bending part 2111 extends along the length direction of the substrate layer 211. Figure 4

[0027] The waterproof adhesive tape 210 for photovoltaic modules described above is used in the following way: the release layer 213 is removed, and the adhesive layer 212 is adhered to the edge of the module body 220 on the side away from the substrate layer 211. Since the side of the substrate layer 211 away from the adhesive layer 212 is provided with two easy-bending parts 2111, the two easy-bending parts 2111 are easily bent under stress. Thus, after the waterproof adhesive tape 210 for photovoltaic modules is bent at the easy-bending parts 2111 on the opposite sides in the width direction, it can be fixed to the front and back surfaces of the module body 220, respectively. After the opposite sides of the waterproof adhesive tape 210 for photovoltaic modules are adhered to the front and back surfaces of the module body 220, the elastic recovery stress of the easy-bending parts 2111 is weak, so the opposite sides of the waterproof adhesive tape 210 for photovoltaic modules can be stably adhered to the front and back surfaces of the module body 220, and the adhesion is tight, thereby preventing gaps between the waterproof adhesive tape 210 for photovoltaic modules and the module body 220, and effectively preventing the invasion of water vapor. In addition, during long-term outdoor use, the occurrence of debonding defects can be effectively prevented, and water can be normally prevented.

[0028] ​The substrate layer 211 can be an aluminum-containing composite film or a single film layer or a co-extruded film layer of at least two film materials, including but not limited to polyvinylidene fluoride, ethylene-tetrafluoroethylene copolymer, polychlorotrifluoroethylene, polytetrafluoroethylene, polyethylene, polypropylene, ethylene-octene copolymer, ethylene-vinyl acetate copolymer, polymethacrylate, and ethylene-propylene-diene rubber. In addition, the adhesive layer 212 can be a solvent-free hot melt adhesive layer or a pressure-sensitive adhesive layer, including but not limited to a high water-resistant pressure-sensitive adhesive layer. In addition, the release layer 213 can be a single-layer polyester release film or a silicon-based release material layer, wherein the substrate of the release material layer includes but is not limited to PET (polyethylene terephthalate), PE (polyethylene), glassine paper, and double plastic-coated paper.

[0029] Referring to Figure 4 In one embodiment, the thickness of the easy-bending portion 2111 is less than the thickness of the substrate layer 211 outside the easy-bending portion 2111. In this way, the easy-bending portion 2111 is easy to bend when stressed, and the rebound stress of the easy-bending portion 2111 is weak, so that the photovoltaic module water-resistant adhesive tape 210 can be firmly attached to the front and back surfaces of the module body 220.

[0030] In some embodiments, the easy-bending portion 2111 is provided with one or a combination of cracks, grooves, and intermittent holes.

[0031] In one embodiment, the easy-bending portion 2111 is provided with cracks, for example, extending from one end of the substrate to the other end. When the cracks are stressed, the easy-bending portion 2111 is easy to crack, so that the easy-bending portion 2111 is easy to bend. In addition, the rebound stress of the easy-bending portion 2111 after bending is weak, so that the photovoltaic module water-resistant adhesive tape 210 can be firmly attached to the front and back surfaces of the module body 220. Optionally, the cracks are formed on the side surface of the substrate by laser etching.

[0032] Referring to Figure 4 In one embodiment, the easy-bending portion 2111 is provided with grooves, for example, extending from one end of the substrate to the other end. When the grooves are stressed, the easy-bending portion 2111 is easy to bend. In addition, the rebound stress of the easy-bending portion 2111 after bending is weak, so that the photovoltaic module water-resistant adhesive tape 210 can be firmly attached to the front and back surfaces of the module body 220. Optionally, the grooves are formed on the side surface of the substrate by laser etching or are integrally formed with the substrate by injection molding.

[0033] In one embodiment, the easy-bending part 2111 is provided with intermittent holes, which include a plurality of blind holes arranged in sequence along the length direction of the substrate. The blind holes are formed on the side surface of the substrate by laser etching, for example. The intermittent holes make the easy-bending part 2111 easy to bend when subjected to external force. In addition, the rebound stress of the easy-bending part 2111 after bending is weak, so that the opposite sides of the waterproof adhesive tape 210 for photovoltaic modules can be firmly attached to the front and back surfaces of the module body 220, with high close-fitting property.

[0034] In one embodiment, when the easy-bending part 2111 is provided with a groove, the groove is specifically a V-shaped groove. In this way, the easy-bending part 2111 can be easily machined on the side surface of the substrate, and the easy-bending part 2111 can be easily bent when subjected to force.

[0035] In one embodiment, the two groove walls 2112 of the V-shaped groove are arranged at an acute angle. Specifically, the included angle formed by the two groove walls 2112 of the V-shaped groove includes but is not limited to 30° to 60°, and is specifically, for example, 30°, 40°, 50° or 60°, and the like.

[0036] In some optional schemes, the cross-sectional profile of the groove along its extension direction can also be set as an arc shape, a square shape, and other regular shapes and irregular shapes, which can be flexibly adjusted and set according to actual needs.

[0037] In some embodiments, the thickness of the substrate layer 211 includes but is not limited to 20 μm, 22 μm, 25 μm, 26 μm or 30 μm, which can be flexibly adjusted and set according to actual needs. In addition, the thickness of the adhesive layer 212 includes but is not limited to 30 μm, 33 μm, 35 μm, 37 μm or 40 μm, which can be flexibly adjusted and set according to actual needs. In addition, the thickness of the release layer 213 includes but is not limited to 20 μm, 22 μm, 25 μm, 26 μm or 30 μm, which can be flexibly adjusted and set according to actual needs.

[0038] In one embodiment, the substrate layer 211 is an aluminum-containing composite film with a thickness of 25 μm. In addition, the adhesive layer is a high-water-resistance pressure-sensitive adhesive layer with a thickness of 35 μm. In addition, the release layer 213 is a single-layer release polyester release film with a thickness of 25 μm.

[0039] Please refer to Figures 4 to 6 In one embodiment, the present application also provides a photovoltaic module, which includes the waterproof adhesive tape 210 for photovoltaic modules of any of the above embodiments, and further includes a module body 220, and the side of the adhesive layer 212 away from the substrate layer 211 is attached to the edge of the module body 220.

[0040] In use, the release layer 213 is removed, and the adhesive layer 212 is adhered to the edges of the module body 220 on the side opposite the substrate layer 211. Because the substrate layer 211 has two easily bent portions 2111 on the side opposite the adhesive layer 212, the two easily bent portions 2111 are easily bent under stress. Thus, after the water-resistant adhesive tape 210 for photovoltaic modules is bent at the easily bent portions 2111 on opposite sides in the width direction, the opposite sides can be fixed to the front and back of the module body 220, respectively. After the opposite sides of the water-resistant adhesive tape 210 for photovoltaic modules are fixed to the front and back of the module body 220, the opposite sides can be stably fixed to the front and back of the module body 220 because of the weak springback stress of the easily bent portions 2111, and the opposite sides have high adhesion, thereby preventing gaps between the water-resistant adhesive tape 210 for photovoltaic modules and the module body 220, and effectively preventing water vapor from entering. In addition, during long-term outdoor use, the water-resistant adhesive tape 210 for photovoltaic modules can effectively prevent debonding defects and can normally prevent water.

[0041] In one embodiment, the distance between the center axes of the two easily bent portions 2111 is S, and the thickness of the module body 220 is d, and 0.95d≤S≤1.05d. Thus, the area of the water-resistant adhesive tape 210 for photovoltaic modules between the two easily bent portions 2111 can be fixed to the side wall of the module body 220, and the opposite sides of the water-resistant adhesive tape 210 for photovoltaic modules can be stably fixed to the front and back of the module body 220 after being bent.

[0042] Specifically, S is, for example, 0.95d, 0.98d, d, 1.02d, or 1.05d, and the like.

[0043] Referring to Figure 6 In one embodiment, the water-resistant adhesive tape 210 for photovoltaic modules includes a main body portion 214 and two connecting portions 215 on opposite sides of the main body portion 214. The opposite sides of the main body portion 214 are connected to the two connecting portions 215, respectively. The easily bent portions 2111 are arranged between the main body portion 214 and the connecting portions 215. The main body portion 214 is connected to the side wall of the module body 220, and the two connecting portions 215 are connected to the front and back of the module body 220, respectively.

[0044] In one embodiment, the water-resistant adhesive tape 210 for photovoltaic modules is arranged around the circumference of the module body 220. Thus, the water-resistant adhesive tape 210 for photovoltaic modules and the four edges of the module body 220 are stably adhered together, and water vapor can be effectively prevented from entering.

[0045] Referring to Figure 5 and Figure 6In some embodiments, the assembly body 220 comprises a first panel 221, a first adhesive film 222, a battery piece 223, a second adhesive film 224, and a second panel 225 arranged in sequence. The first panel 221 can be a light-transmitting or non-light-transmitting panel, such as a glass panel or a stainless steel panel, and is located at the back of the assembly body 220, i.e., the back light side, when the photovoltaic assembly is in use. The second panel 225 is a light-transmitting panel, such as a glass panel, and is located at the front of the assembly body 220, i.e., the light-incident side, when the photovoltaic assembly is in use.

[0046] In some embodiments, the assembly body 220 is further provided with a frame (not shown in the figure). The frame protects the four edges of the assembly body 220 and is not easily deformed and damaged under stress. Optionally, the frame includes, but is not limited to, an aluminum frame, a copper frame, or a stainless steel frame, etc. Specifically, the water-blocking tape 210 for photovoltaic assemblies is arranged around the frame and adheres to the frame.

[0047] Using 210-TOPCon cells, printing is performed under the same screen, wherein the comparative group uses a conventional water-blocking tape without a flexible bending part, and the experimental group uses a water-blocking tape with a flexible bending part. The specific test sample information is shown in Table 1 below:

[0048] Table 1 Test samples

[0049]

[0050] The related properties of the water-blocking tape for photovoltaic assemblies in the experimental group and the comparative group are tested, and the test experiments include:

[0051] (1) Peel strength test, referring to GB / T 2792-2014 Test methods for peel strength of adhesive tape;

[0052] (2) Mechanical property test, referring to GB / T 30776-2014 Test methods for tensile strength and elongation at break of adhesive tape;

[0053] (3) Water vapor transmission rate test, referring to GB / T 15331-2020 Test methods for water vapor transmission rate of pressure-sensitive adhesive tape;

[0054] (4) Peel strength test after aging, referring to IEC61215 for DH1000, HF100, and TC200 aging treatment, respectively, and then performing the adhesive tape peel strength test according to (1) after 2h of room temperature standing.

[0055] The test results are shown in Table 2 below:

[0056] Table 2 Test results

[0057]

[0058] From the above test data, it can be seen that the peel strength, basic mechanical properties, water vapor transmission rate and peel strength after aging of the water-blocking tape of the present embodiment are comparable to those of the conventional water-blocking tape.

[0059] The following tests were carried out on the photovoltaic module:

[0060] DH500, DH1000 and DH2000 aging treatments were carried out according to IEC61215, and the power and EL changes of the module before and after aging were recorded.

[0061] Table 3 Power and EL changes of the photovoltaic module after DH

[0062]

[0063] The experimental results show that the EL images of the photovoltaic modules without the water-blocking tape and with the conventional water-blocking tape after DH aging treatment have a certain degree of edge blackening, while the EL images of the photovoltaic module with the concave water-blocking tape before and after DH treatment have no obvious changes, and have a certain improvement in power attenuation. This shows that the introduction of the easy-to-bend part can improve the water-blocking effect of the conventional water-blocking tape to a certain extent.

[0064] In the description of the present application, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0065] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "multiple" appears, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0066] In this application, unless otherwise clearly indicated and limited, if there are terms such as "mount", "connect", "connect", "fix", etc., these terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0067] In this application, unless otherwise clearly indicated and limited, if there are terms such as "mount", "connect", "connect", "fix", etc., these terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0068] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation.

[0069] The technical features of the above-described embodiments can be combined in any manner. In order to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the description.

[0070] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the patent application. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of the patent of the present application should be subject to the appended claims.

Claims

1. A water-blocking tape (210) for a photovoltaic module, characterized by, The waterproof tape (210) for photovoltaic module comprises a substrate layer (211), an adhesive layer (212) and a release layer (213) which are sequentially stacked; two easy-bending parts (2111) are arranged on the side of the substrate layer (211) away from the adhesive layer (212); the two easy-bending parts (2111) are arranged in parallel and spaced apart along the width direction of the substrate layer (211); and each easy-bending part (2111) extends along the length direction of the substrate layer (211).

2. The water-blocking tape (210) for photovoltaic modules according to claim 1, characterized by, The thickness of the easy-bending part (2111) is less than the thickness of the part outside the easy-bending part (2111) on the substrate layer (211).

3. The water-blocking tape (210) for photovoltaic modules according to claim 1 or 2, characterized in that, The easy-bending part (2111) is provided with one or more combinations of cracks, grooves and intermittent holes.

4. The water-blocking tape (210) for photovoltaic modules according to claim 3, characterized by, The groove is a V-shaped groove.

5. The waterresistant tape (210) for photovoltaic modules according to claim 4, characterized in that, The two groove walls (2112) of the V-shaped groove are arranged at an acute angle.

6. The waterresistant tape (210) for photovoltaic modules according to claim 1, characterized in that, The thickness of the substrate layer (211) is 20-30 microns; the thickness of the adhesive layer (212) is 30-40 microns; and the thickness of the release layer (213) is 20-30 microns.

7. A photovoltaic module, characterized by The waterproof tape (210) for photovoltaic module comprises a substrate layer (211), an adhesive layer (212) and a release layer (213) which are sequentially stacked; two easy-bending parts (2111) are arranged on the side of the substrate layer (211) away from the adhesive layer (212); the two easy-bending parts (2111) are arranged in parallel and spaced apart along the width direction of the substrate layer (211); and each easy-bending part (2111) extends along the length direction of the substrate layer (211).

8. The photovoltaic module of claim 7, wherein, The distance between the center axes of the two easy-bending parts (2111) is S, the thickness of the module body (220) is d, and 0.95d≤S≤1.05d.

9. The photovoltaic module of claim 7, wherein, The waterproof tape (210) for photovoltaic module comprises a main body part (214) and two connecting parts (215) respectively located on the opposite sides of the main body part (214); the opposite sides of the main body part (214) are respectively connected with the two connecting parts (215); the easy-bending parts (2111) are arranged between the main body part (214) and the connecting parts (215); the main body part (214) is connected with the side wall of the module body (220), and the two connecting parts (215) are respectively connected with the front face and the back face of the module body (220).

10. The photovoltaic module of claim 7, wherein, The waterproof tape (210) for photovoltaic module is arranged around the circumference of the module body (220).

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