Photovoltaic module

Abstract

The utility model discloses a photovoltaic assembly, and relates to the field of photovoltaic technology. The photovoltaic assembly comprises a glass plate, a first adhesive layer, a battery assembly, a second adhesive layer and a back plate which are sequentially stacked, the battery assembly comprises at least two battery strings which are sequentially arranged, and an inter-string gap is formed between every two adjacent battery strings; a first adsorption part for absorbing moisture is arranged on the periphery of the battery assembly, and / or a second adsorption part for absorbing moisture and acetic acid is arranged in the inter-string gap. The photovoltaic assembly provided by the utility model can avoid adverse effects caused by moisture invasion, and is higher in stability.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic technology field, specifically, relate to a photovoltaic module. BACKGROUND

[0002] At present, the moisture in the environment will invade the inside of the component because of the problems such as sealing when the photovoltaic module is in practical application or in the hygrothermal reliability test.

[0003] In order to reduce the cost, the adhesive film in the photovoltaic module is usually EVA. EVA will react to produce acetic acid when meeting water, and the acetic acid will cause the damage of solder strip, grid line and the like, affect the current transmission of the whole component, cause the power generation power to reduce, and even cause the component to fail. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a photovoltaic module, which can avoid the adverse effects caused by moisture invasion and has the characteristics of higher stability.

[0005] The embodiment of the utility model provides a technical scheme:

[0006] A photovoltaic module, comprising glass plate, first adhesive layer, battery assembly, second adhesive layer and back plate which are sequentially stacked, the battery assembly comprises at least two battery strings arranged in sequence, and a string gap is formed between the adjacent two battery strings.

[0007] The battery assembly is provided with a first absorbing accessory for absorbing moisture around the periphery, and / or,

[0008] The second absorbing accessory for absorbing moisture and acetic acid is arranged in the string gap.

[0009] In the optional implementation, the first absorbing accessory is arranged at intervals with the battery assembly, and / or,

[0010] The second absorbing accessory is arranged at intervals with any battery string.

[0011] In the optional implementation, in the stacking direction of the photovoltaic module, the opposite sides of the first absorbing accessory are flush with the opposite sides of the battery assembly, and / or,

[0012] The opposite sides of the second absorbing accessory are flush with the opposite sides of the battery assembly.

[0013] In the optional implementation, the first absorbing accessory is in strip shape, and a plurality of first absorbing accessories are connected head to tail and annularly arranged around the periphery of the battery assembly.

[0014] In an optional embodiment, the battery assembly is rectangular, and the first suction member on the long side of the battery assembly has a greater width than the first suction member on the wide side of the battery assembly.

[0015] In an optional embodiment, the width of the second suction member is one fifth to four fifths of the width of the inter-string gap.

[0016] In an optional embodiment, the second suction member is in the form of a strip, and a plurality of the second suction members are arranged in sequence along the length direction of the inter-string gap.

[0017] In an optional embodiment, the two ends of the battery string in the length direction are flush with the two second suction members, respectively.

[0018] In an optional embodiment, the battery string comprises a plurality of battery unit pieces arranged in sequence, and the plurality of battery unit pieces of the two adjacent battery strings are aligned on the two sides of the inter-string gap, and the second suction member is arranged between any two aligned battery unit pieces.

[0019] In an optional embodiment, the photovoltaic module further comprises a frame, the glass plate, the first adhesive layer, the battery assembly, the second adhesive layer and the back plate form a laminated assembly, the frame is annularly arranged at the periphery of the laminated assembly, and the first suction member is arranged in a spaced manner with the frame.

[0020] Compared with the prior art, the photovoltaic module provided by the utility model has the first suction member arranged at the periphery of the battery assembly between the first adhesive layer and the second adhesive layer, and has the second suction member arranged in the inter-string gap between the adjacent battery strings of the battery assembly, the first suction member is used for absorbing moisture, and the second suction member is used for absorbing moisture and acetic acid. In actual application, when the moisture in the environment invades the battery assembly from the edge, the first suction member absorbs the moisture; even if part of the moisture enters the interior by passing the first suction member, the second suction member absorbs the part of the moisture; even if part of the moisture successfully reacts with the first adhesive layer or the second adhesive layer of the EVA material to generate acetic acid, the second suction member can also absorb the generated acetic acid, avoiding damage to the internal structure by the acetic acid. Therefore, the photovoltaic module provided by the utility model has the beneficial effects of being able to avoid the adverse effects caused by the invasion of moisture and having higher stability. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0022] Figure 1 A partial structure of a photovoltaic module is provided in the embodiment of the present application.

[0023] Figure 2 For Figure 1 The structure schematic view of the battery module, the first suction accessory and the first adhesive layer is arranged on the first adhesive layer.

[0024] Figure 3 For Figure 2 The enlarged schematic view of the A area.

[0025] Icon: 100-photovoltaic module; 110-glass plate; 120-first adhesive layer; 130-battery module; 131-battery string; 132-inter-string gap; 140-second adhesive layer; 150-back plate; 160-first suction accessory; 170-second suction accessory; 180-frame. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0028] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0029] In the description of the present application, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0030] In addition, the terms "first", "second" and the like are used only to distinguish descriptions, and cannot be understood as indicating or implying relative importance.

[0031] In the description of the utility model, it is necessary to explain that, unless otherwise explicitly provided and limited, the terms "set", "connect" and the like should be understood broadly, for example, "connect" can be fixedly connected, can be detachably connected, or integrally connected, can be mechanically connected, or electrically connected, can be directly connected, or indirectly connected through intermediate medium, can be the communication inside two elements.For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0032] The specific embodiments of the utility model will be described in detail below in combination with the drawings.

[0033] Embodiment

[0034] Please refer to Figure 1 , Figure 1 As shown in the partial structure of the photovoltaic module 100 provided by the embodiment.

[0035] The embodiment provides a photovoltaic module 100, which comprises a glass plate 110, a first adhesive layer 120, a battery module 130, a second adhesive layer 140 and a back plate 150 arranged in sequence, and a first moisture absorbing accessory 160 for absorbing moisture is arranged at the periphery of the battery module 130 between the first adhesive layer 120 and the second adhesive layer 140.

[0036] The first moisture absorbing accessory 160 forms waterproof protection at the periphery of the battery module 130, whether in actual photovoltaic power generation or in humid heat reliability test, the first moisture absorbing accessory 160 can prevent the moisture in the environment from invading the battery module 130 from the edge of the photovoltaic module 100.

[0037] In the embodiment, the first moisture absorbing accessory 160 is strip-shaped, and actually, the number thereof is multiple, the multiple first moisture absorbing accessories 160 are connected end to end and arranged in a ring at the periphery of the battery module 130, forming circumferential surrounding of the battery module 130.

[0038] In actual application, no matter in which direction of the periphery of the photovoltaic module 100 water invades, there is corresponding first moisture absorbing accessory 160 to absorb the invading water, so as to avoid the water from entering the battery module 130 and reacting with the first adhesive layer 120 or the second adhesive layer 140 to produce acetic acid and damage the battery module 130.

[0039] The first moisture absorbing accessory 160 can contain calcium sulfate, calcium oxide, calcium chloride, magnesium sulfate and other substances with water absorption capacity, and can be one or a mixture of multiple.

[0040] As preferred, the first absorbing member 160 in the embodiment is calcium sulfate, arranged in solid strip on the periphery of the battery assembly 130. Calcium sulfate is neutral after absorbing water, and does not react with other substances, so that the photovoltaic assembly 100 maintains a stable state.

[0041] Please refer to Figure 2 and Figure 3 , Figure 2 Fig. 2 shows a structural schematic diagram of the battery assembly 130 and the first absorbing member 160 arranged on the first adhesive layer 120, Figure 3 Fig. 3 shows an enlarged schematic diagram of area A in Fig. 2. Figure 2

[0042] In order to avoid the influence of the first absorbing member 160 on the performance of the photovoltaic assembly 100, in the embodiment, the first absorbing member 160 is arranged spaced apart from the battery assembly 130, in other words, the annular structure composed of the plurality of first absorbing members 160 is circumferentially spaced apart to surround the battery assembly 130.

[0043] In order to avoid affecting the lamination quality, in the embodiment, in the stacking direction of the photovoltaic assembly 100, the opposite sides of the first absorbing member 160 are flush with the opposite sides of the battery assembly 130. In fact, the thickness of the first absorbing member 160 is substantially the same as the thickness of the battery assembly 130.

[0044] In addition, in the embodiment, the battery assembly 130 is rectangular, and considering that the length dimension of the battery assembly 130 is greater than the width dimension, the probability of absorbing water is greater, and stronger protection effect is needed, therefore, in the embodiment, compared with the first absorbing member 160 on the outside of the width side of the battery assembly 130, the width of the first absorbing member 160 on the outside of the length side of the battery assembly 130 is greater.

[0045] As preferred, in the embodiment, the width of the first absorbing member 160 on the outside of the width side of the battery assembly is 1.96mm, and the width of the first absorbing member 160 on the outside of the length side of the battery assembly is 3mm.

[0046] In fact, the photovoltaic assembly 100 also includes a frame 180 and a junction box (not shown in the figure) and other structures, and the frame 180 is annularly arranged on the periphery of the laminated assembly composed of the glass plate 110, the first adhesive layer 120, the battery assembly 130, the second adhesive layer 140 and the back plate 150.

[0047] ​It can be understood that, in actual application, the frame 180 is assembled after the lamination assembly and lamination process, in order to avoid the first absorbing member 160 being damaged in the process of assembling the frame 180, the first absorbing member 160 needs to reserve a certain width of the gap between the edge of the glass plate 110 when arranging, so that the first absorbing member 160 is spaced apart from the frame 180 after the frame 180 is assembled.

[0048] In the embodiment, the battery assembly 130 includes a plurality of battery strings 131 arranged in sequence and spaced apart, and the plurality of battery strings 131 are arranged side by side, and a string gap 132 is formed between any two adjacent battery strings 131. The photovoltaic assembly 100 provided in the embodiment is further provided with a second absorbing member 170 for absorbing moisture and acetic acid in each string gap 132.

[0049] Specifically, in the embodiment, the battery assembly 130 uses 54 battery pieces, each battery piece is cut into a half piece, and then is series-welded, the half piece is defined as a battery unit piece, and a version of 108 battery unit pieces in 6 columns and 18 rows is formed by series-welding. The 18 battery unit pieces in the same column form a battery string 131, and there are 6 battery strings 131 in total, and 5 string gaps 132 are formed.

[0050] The second absorbing member 170 is also in the form of a long strip, and the number of the second absorbing member 170 in the embodiment is multiple, and a plurality of second absorbing members 170 are arranged in sequence along the length direction in any string gap 132, and the extension direction of each second absorbing member 170 is the same as the extension direction of the string gap 132.

[0051] The plurality of battery unit pieces of the two adjacent battery strings 131 are aligned on both sides of the corresponding string gap 132, and in order to achieve reliable protection effect inside the battery assembly 130, the second absorbing member 170 is arranged between any two aligned battery unit pieces in the embodiment.

[0052] Specifically, in the embodiment, the length of each second absorbing member 170 is about 91.95 mm, the number of the second absorbing members 170 in each string gap 132 is 18, and the total number of the second absorbing members 170 is 90.

[0053] Similarly, the second absorbing member 170 can contain calcium sulfate, calcium oxide, calcium chloride, magnesium sulfate and the like. As preferred, the second absorbing member 170 in the embodiment is a mixture of calcium sulfate and calcium oxide, and is arranged in the form of a solid strip in the string gap 132.

[0054] In actual application, if there is some invading water entering the inside of the battery assembly 130 through the first absorbing member 160, the second absorbing member 170 can absorb the water. If there is some water not absorbed in time reacting with the first adhesive layer 120 or the second adhesive layer 140 to produce a small amount of acetic acid, the calcium oxide in the second absorbing member 170 reacts with the acetic acid to absorb the acetic acid, avoiding the corrosion of the battery assembly 130 by the acetic acid. The water produced in the reaction is absorbed in the second absorbing member 170, preventing further hydrolysis of the first adhesive layer 120 or the second adhesive layer 140. Moreover, no gas is produced in the reaction process, which does not affect the stability of the photovoltaic module 100.

[0055] Similarly, in order to avoid the second absorbing member 170 affecting the performance of the photovoltaic module 100, in the embodiment, the second absorbing member 170 is arranged to be spaced apart from the battery string 131. More desirably, the width of the second absorbing member 170 accounts for one fifth to four fifths of the width of the inter-string gap 132. As a preferred, in the embodiment, the width of the second absorbing member 170 accounts for about one third of the width of the inter-string gap 132.

[0056] As a preferred, in the embodiment, the width of the inter-string gap 132 is about 1.74 mm, and the width of the second absorbing member 170 is about 0.6 mm.

[0057] Similarly, in order to avoid affecting the lamination quality, in the stacking direction, the opposite sides of the second absorbing member 170 are also flush with the opposite sides of the battery assembly 130, and are also substantially flush. In the embodiment, the thickness of the battery cell sheet, the first absorbing member 160 and the second absorbing member 170 is about 0.15 mm.

[0058] Moreover, in order to further improve the protection effect of the second absorbing member 170, the two ends of the battery string 131 in the length direction are flush with the two second absorbing members 170 respectively. In other words, in any inter-string gap 132, the two ends of the two second absorbing members 170 facing away from each other are flush with the two ends of the inter-string gap 132.

[0059] The photovoltaic module 100 provided by the embodiment, in the actual assembly process, the glass plate 110 is placed with the rough surface upward, the first adhesive layer 120 is laid flat on the glass plate 110, the light surface of the first adhesive layer 120 faces the glass plate 110, the first adhesive layer 120 is EVA or POE, and the periphery of the first adhesive layer 120 exceeds the periphery of the glass plate 110 by more than 5 mm. Then the positioning template is arranged on the first adhesive layer 120, the multiple battery strings 131 completed with string welding are placed on the first adhesive layer 120 with the positioning template aligned, and the anti-reflective film surface of the battery string 131 faces downward.

[0060] After the battery string 131 is placed in position, the busbar is welded, and the first suction accessory 160 and the second suction accessory 170 are arranged on the first adhesive layer 120, that is, a plurality of first suction accessories 160 are arranged along the periphery of the battery assembly 130 to form a ring structure that circumferentially surrounds the battery assembly 130, and a plurality of second suction accessories 170 are arranged in the inter-string gap 132 in sequence. After the arrangement of the first suction accessory 160 and the second suction accessory 170 is completed, the second adhesive layer 140 is laid on the upper surface of the battery assembly 130 with the nap facing downward. Finally, the back plate 150 is laid on the second adhesive layer 140, and subsequent steps such as lamination, EL testing, and frame mounting are performed.

[0061] It should be noted that in another embodiment, the first suction accessory 160 can be a one-piece structure, that is, a one-piece ring structure, which is arranged as a whole on the periphery of the battery assembly 130. The second suction accessory 170 arranged in each inter-string gap 132 can also be a one-piece structure, that is, one second suction accessory 170 is arranged in one inter-string gap 132, and the suction accessory extends from one end of the inter-string gap 132 to the other end.

[0062] Through testing, the reliability DH1000 attenuation of the photovoltaic module 100 provided in the embodiment is reduced from the benchmark of 2.41% to 1.54%, which is reduced by 0.87%; the HF10 attenuation is reduced from the benchmark of 1.53% to 0.92%, which is reduced by 0.61%. It can be seen that the reliability and weather resistance level of the photovoltaic module 100 are greatly enhanced, and the power generation performance is significantly improved.

[0063] It can be seen that the photovoltaic module 100 provided in the embodiment, the first suction accessory 160 forms an edge waterproof on the periphery of the battery assembly 130, which can prevent water in the environment from invading the battery assembly 130 to a certain extent. The second suction accessory 170 forms an internal waterproof in the interior of the battery assembly 130 and has the function of removing acetic acid, which can avoid damage to the battery assembly 130 caused by water invading the battery assembly 130.

[0064] In summary, the photovoltaic module 100 provided in the embodiment can avoid the adverse effects caused by water invasion and has higher stability.

[0065] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A photovoltaic module, characterized by, The photovoltaic module (100) comprises a glass plate (110), a first adhesive layer (120), a battery assembly (130), a second adhesive layer (140) and a back plate (150) arranged in sequence, the battery assembly (130) comprises at least two battery strings (131) arranged in sequence, and a string gap (132) is formed between adjacent two battery strings (131); The battery assembly (130) is provided with a first moisture absorbing member (160) around the periphery for absorbing moisture, and / or, The second moisture absorbing member (170) is arranged in the string gap (132) for absorbing moisture and acetic acid.

2. The photovoltaic module of claim 1, wherein, The first moisture absorbing member (160) is arranged apart from the battery assembly (130), and / or, The second moisture absorbing member (170) is arranged apart from any battery string (131).

3. The photovoltaic module of claim 1, wherein, In the stacking direction of the photovoltaic module (100), the opposite sides of the first moisture absorbing member (160) are flush with the opposite sides of the battery assembly (130), and / or, The opposite sides of the second moisture absorbing member (170) are flush with the opposite sides of the battery assembly (130).

4. The photovoltaic module of claim 1, wherein, The first moisture absorbing member (160) is in a strip shape, and a plurality of first moisture absorbing members (160) are connected end to end and arranged around the periphery of the battery assembly (130).

5. The photovoltaic module of claim 4, wherein, The battery assembly (130) is in a rectangular shape, and the width of the first moisture absorbing member (160) on the long side of the battery assembly (130) is greater than that on the wide side of the battery assembly (130).

6. The photovoltaic module of claim 1, wherein, The width of the second moisture absorbing member (170) accounts for one fifth to four fifths of the width of the string gap (132).

7. The photovoltaic module of claim 1, wherein, The second moisture absorbing member (170) is in a strip shape, and a plurality of second moisture absorbing members (170) are arranged in sequence along the length direction of the string gap (132).

8. The photovoltaic module of claim 7, wherein, The two ends of the battery string (131) in the length direction are flush with two second moisture absorbing members (170) respectively.

9. The photovoltaic module of claim 7, wherein, The battery string (131) comprises a plurality of battery unit pieces arranged in sequence, and a plurality of battery unit pieces of adjacent two battery strings (131) are aligned on both sides of the string gap (132), and the second moisture absorbing member (170) is arranged between any two aligned battery unit pieces.

10. The photovoltaic module of claim 1, wherein, The photovoltaic module (100) further comprises a frame (180), the glass plate (110), the first adhesive layer (120), the battery assembly (130), the second adhesive layer (140) and the back plate (150) form a laminated assembly, the frame (180) is arranged around the periphery of the laminated assembly, and the first moisture absorbing member (160) is arranged apart from the frame (180).

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