Photovoltaic glass and photovoltaic module

Abstract

The utility model relates to photovoltaic glass and a photovoltaic module. The photovoltaic glass comprises a glass substrate; the plurality of first mounting grooves correspond to the distance between two adjacent solar cell strings and are used for mounting a first film belt of a photovoltaic module, so that the surface of the first film belt is coplanar with the surface of the glass substrate; and the second mounting grooves correspond to the distance between two adjacent battery pieces in the solar battery string and are used for mounting a second film belt of the photovoltaic module, so that the surface of the second film belt is coplanar with the surface of the glass substrate. During lamination, the first film belt and the second film belt do not apply force to the battery pieces in the solar battery string, the problem that the corners of the battery pieces are cracked is avoided, the yield of the photovoltaic module is improved, meanwhile, the first film belt and the second film belt can reflect sunlight at the gap, and the utilization rate of the sunlight is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaic, in particular to a photovoltaic glass and a photovoltaic module. BACKGROUND

[0002] As a low-carbon renewable energy, the solar energy industry is booming worldwide. Photovoltaic modules are the core units of solar power generation, and improving the efficiency of photovoltaic modules has always been the top priority of the industry. One of the important main materials of photovoltaic modules is photovoltaic glass, which is mainly used for packaging photovoltaic modules. Photovoltaic glass directly affects the power generation efficiency and service life of photovoltaic modules.

[0003] In the photovoltaic module manufacturing process, the front photovoltaic glass, the first layer of EVA (Polyethylenevinylacetate, polyethylene-vinyl acetate copolymer) adhesive film, the photovoltaic cell, the second layer of EVA adhesive film and the back photovoltaic glass need to be pressed together. Sunlight shines through the gap between the photovoltaic module cell string and hits the back photovoltaic glass. Currently, the photovoltaic glass is a bidirectional light-transmitting glass, and sunlight directly transmits through the photovoltaic glass, which cannot utilize this part of sunlight, reducing the utilization rate of sunlight.

[0004] Therefore, in a double-glass photovoltaic module, a back photovoltaic glass gap reflective film is used to improve power. However, the gap reflective film has a thickness of 105-125 μm, and the horizontal and vertical staggered thickness reaches 210-250 μm, and is located at the edge of the cell, which, together with the low weight adhesive film, easily causes edge cracks or cracks during lamination, affecting the yield of the module. Invention content

[0005] Therefore, it is necessary to provide a photovoltaic glass and a photovoltaic module to solve the problem of cell edge cracking caused by the installation of a reflective film in the current photovoltaic module to improve light utilization, which can avoid the problem of cell edge cracking during lamination, improve the yield of the photovoltaic module, and also improve the utilization rate of sunlight.

[0006] A photovoltaic glass, comprising:

[0007] a glass base;

[0008] a plurality of first mounting grooves recessed on the surface of the glass base facing the solar cell string of the photovoltaic module, the first mounting grooves extending along a first direction and being spaced apart along a second direction, the first mounting grooves corresponding to the spacing between two adjacent solar cell strings and being used for mounting a first film strip of the photovoltaic module, so that the surface of the first film strip is coplanar with the surface of the glass base; and

[0009] a plurality of second installation grooves recessed on the surface of the glass substrate facing the solar cell string and arranged along the first direction, the second installation grooves extending along the second direction and intersecting with the first installation grooves, the second installation grooves corresponding to the interval between two adjacent solar cell pieces in the solar cell string and used for mounting a second film strip of the photovoltaic module so that the surface of the second film strip is coplanar with the surface of the glass substrate.

[0010] In an embodiment of the present application, the first installation groove has a first installation surface and a first flared portion, the first installation surface and the first flared portion being recessed on the glass substrate along the first direction, the first flared portion being arranged on both sides of the first installation surface along the second direction and surrounding the first installation surface to form the first installation groove.

[0011] In an embodiment of the present application, the first flared portion includes two first inclined surfaces symmetrically arranged on both sides of the first installation surface along the second direction, or the first flared portion includes a first inclined surface and a first vertical surface oppositely arranged on both sides of the first installation surface along the second direction.

[0012] And / or, the first installation groove further includes a first polished transition surface connecting the first flared portion and the glass substrate.

[0013] In an embodiment of the present application, the second installation groove has a second installation surface and a second flared portion, the second installation surface and the second flared portion being recessed on the glass substrate along the second direction, the second flared portion being arranged on both sides of the second installation surface along the first direction and surrounding the second installation surface to form the second installation groove.

[0014] In an embodiment of the present application, the second flared portion includes two second inclined surfaces symmetrically arranged on both sides of the second installation surface along the first direction, or the second flared portion includes a second inclined surface and a second vertical surface oppositely arranged on both sides of the second installation surface along the first direction.

[0015] And / or, the second installation groove further includes a second polished transition surface connecting the second flared portion and the glass substrate.

[0016] In an embodiment of the present application, in the first installation groove, the width dimension of the first installation surface along the second direction is adapted to the width dimension of the first film strip along the second direction.

[0017] And / or, a width dimension of the first flared portion of the first mounting groove away from the first mounting surface along the second direction is 0.3mm-1.4mm longer than a width dimension of the first mounting surface;

[0018] And / or, a width dimension of the second mounting surface of the second mounting groove along the first direction is adapted to a width dimension of the second film strip along the first direction;

[0019] And / or, a width dimension of the second flared portion of the second mounting groove away from the second mounting surface along the first direction is 0.3mm-1.4mm longer than a width dimension of the second mounting surface.

[0020] In an embodiment of the present application, a depth of the first mounting groove is adapted to a thickness of the first film strip;

[0021] And / or, a depth of the second mounting groove is adapted to a thickness of the second film strip.

[0022] In an embodiment of the present application, the photovoltaic glass further has a third mounting groove, the third mounting groove is disposed at an intersection of the first mounting groove and the second mounting groove, and is recessed in the first mounting groove and the second mounting groove;

[0023] A depth of the third mounting groove is adapted to a sum of thicknesses of the first film strip and the second film strip.

[0024] In an embodiment of the present application, the photovoltaic glass further has a plurality of first accommodating grooves, the plurality of first accommodating grooves are recessed disposed on a surface of the glass substrate facing the solar cell string, the plurality of first accommodating grooves extend along the first direction and are spaced apart along the second direction, and the first accommodating grooves are used for accommodating the conductive connecting pieces of the solar cell string.

[0025] And / or, the photovoltaic glass further has a plurality of second accommodating grooves, the plurality of second accommodating grooves are recessed disposed on a surface of the glass substrate facing the solar cell string, the plurality of second accommodating grooves extend along the second direction and are spaced apart along the first direction, and the second accommodating grooves are used for accommodating the bus bars of the solar cell string.

[0026] A photovoltaic assembly, comprising a cover glass, a plurality of solar cell strings, a first film strip, a second film strip, and the photovoltaic glass according to any one of the above embodiments;

[0027] The first film strip and the second film strip are disposed on the photovoltaic glass, the cover glass is disposed on a light-receiving surface of the plurality of solar cell strings, and the photovoltaic glass is disposed on a back surface of the plurality of solar cell strings.

[0028] By adopting the above technical solution, this application has at least the following technical effects:

[0029] The photovoltaic glass and photovoltaic module of this application, wherein the photovoltaic glass has a plurality of first mounting grooves and a plurality of second mounting grooves provided on the surface of the glass substrate facing the solar cell string, the plurality of first mounting grooves extending along a first direction and spaced apart along a second direction, the plurality of second mounting grooves extending along a second direction and spaced apart along a first direction, a first film strip is installed in the first mounting groove, a second film strip is installed in the second mounting groove, and the surface of the first film strip and the surface of the second film strip are coplanar.

[0030] This photovoltaic glass features a first mounting groove on the glass substrate corresponding to the spacing between two adjacent solar cell strings, and a second mounting groove corresponding to the spacing between two adjacent cells within a solar cell string. This ensures that the surface of the first film strip in the first mounting groove is coplanar with the surface of the glass substrate, and the surface of the second film strip in the second mounting groove is coplanar with the surface of the glass substrate. During photovoltaic module lamination, the first and second film strips do not exert force on the cells within the solar cell strings, thus preventing cell cracking at the edges and corners, improving the yield rate of the photovoltaic module. Simultaneously, the first and second film strips can reflect sunlight at the gaps, improving the utilization rate of sunlight. Attached Figure Description

[0031] Figure 1 This is a top view of a photovoltaic glass according to an embodiment of this application.

[0032] Figure 2 for Figure 1 The image shows a magnified view of the photovoltaic glass at point A.

[0033] Figure 3 for Figure 2 The image shows a magnified view of the photovoltaic glass at point BB.

[0034] Figure 4 for Figure 2 The image shows a magnified view of the photovoltaic glass at point CC.

[0035] Figure 5 for Figure 3 The diagram shows the dimensions of the photovoltaic glass.

[0036] Figure 6 for Figure 4 The diagram shows the dimensions of the photovoltaic glass.

[0037] Wherein: 100, photovoltaic glass; 110, glass substrate; 120, first mounting groove; 121, first mounting surface; 122, first flared portion; 130, second mounting groove; 131, second mounting surface; 132, second flared portion; 200, first film strip; 300, second film strip. DETAILED DESCRIPTION

[0038] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the 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 different ways beyond the specific embodiments described herein and by one of ordinary skill in the art without departing from the spirit and scope of the present application, and it is therefore intended that all such variations be considered as falling within the scope of the present application. It should be understood that the present application can be practiced with modification and alteration, and that the present application is not limited to the above described embodiments.

[0039] In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of 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.

[0040] In addition, if the 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 technical features referred to. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0041] In the present application, unless otherwise explicitly specified and limited, if the terms "mounting", "connecting", "connecting", "fixing" and the like appear, these terms should be interpreted broadly. 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 explicitly limited. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] In the present application, unless specifically stated and limited otherwise, if there is a description of a first feature "on" or "under" a second feature, etc., it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "on", "above" and "over" the second feature can be that the first feature is directly above or obliquely above the second feature, or only means that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only means that the first feature is lower in horizontal height than the second feature.

[0043] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can be an intervening element. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used herein are used for illustrative purposes only and are not intended to be the only implementation.

[0044] One of the important main materials of the photovoltaic module is the photovoltaic glass, which is mainly used for packaging of the photovoltaic module, and the photovoltaic glass directly affects the power generation efficiency and service life of the photovoltaic module. The sunlight passes through the gap of the photovoltaic module cell string and irradiates on the photovoltaic glass on the back. At present, the photovoltaic glass is a bidirectional light transmission glass, and the sunlight directly transmits through the photovoltaic glass, so that the part of the sunlight cannot be utilized, thereby reducing the utilization rate of the sunlight.

[0045] Therefore, in the double-glass photovoltaic module, in order to improve the power, the gap reflective film is used on the back photovoltaic glass. However, the gap reflective film has a thickness of 105-125 μm, the cross staggered thickness reaches 210-250 μm, and is just located at the corner of the cell piece, so that the low-gram weight adhesive film is easily led to the corner crack or the piece crack in the lamination process, thereby affecting the yield of the module.

[0046] Therefore, Figures 1 to 4 The present application provides a novel photovoltaic glass 100. The photovoltaic glass 100 is applied to a photovoltaic module (not shown). Figure 1 The top view of the photovoltaic glass 100 according to an embodiment of the present application is shown in FIG. 1. Figure 2 The partial enlarged view of the photovoltaic glass 100 at A shown in FIG. 1 is shown in FIG. 2. Figure 1 The partial enlarged view of the photovoltaic glass 100 at B-B shown in FIG. 1 is shown in FIG. 3. Figure 3 The partial enlarged view of the photovoltaic glass 100 at C-C shown in FIG. 1 is shown in FIG. 4. Figure 2 The partial enlarged view of the photovoltaic glass 100 at B-B shown in FIG. 1 is shown in FIG. 3. Figure 4 The partial enlarged view of the photovoltaic glass 100 at C-C shown in FIG. 1 is shown in FIG. 4. Figure 2 The partial enlarged view of the photovoltaic glass 100 at C-C shown in FIG. 1 is shown in FIG. 4.

[0047] To better illustrate the specific structure of the photovoltaic glass 100, the structure of the photovoltaic module is briefly introduced here. Referring to Figures 1 to 4 , the photovoltaic module includes a cover glass (not shown), a solar cell string (not shown), and the photovoltaic glass 100 of the present application. The cover glass covers the light-receiving surface of the solar cell string, and the photovoltaic glass 100 is arranged on the back surface of the solar cell string, and the encapsulation of the solar cell string is realized through the cover glass and the photovoltaic glass 100.

[0048] The light-receiving surface of the solar cell string refers to the surface irradiated by sunlight, i.e., the front surface of the solar cell string, and the back surface of the solar cell string refers to the surface away from the sunlight, i.e., the back surface of the solar cell string.

[0049] The cover glass is located above the solar cell string and protects the solar cell string on the light-receiving surface of the solar cell string. The photovoltaic glass 100 of the present application is the back glass of the photovoltaic module, and the photovoltaic glass 100 is arranged below the solar cell string and protects the solar cell string on the back surface of the solar cell string.

[0050] In addition, the photovoltaic module further includes a first film strip 200 and a second film strip 300, and a plurality of cell pieces are connected in series in the solar cell string, and a plurality of solar cell strings are arranged in the photovoltaic module. The first film strip 200 and the second film strip 300 are arranged on the surface of the photovoltaic glass 100 facing the solar cell string.

[0051] The first film strip 200 corresponds to the gap between the adjacent two solar cell strings, and the second film strip 300 corresponds to the gap between the adjacent two cell pieces in the same solar cell string. The first film strip 200 and the second film strip 300 can reflect sunlight.

[0052] Optionally, the first film strip 200 and the second film strip 300 are reflective stickers, which can reflect sunlight. Of course, in other embodiments of the present application, the first film strip 200 and the second film strip 300 can also be other stickers that can reflect sunlight.

[0053] When the sunlight passes through the cover glass and is projected onto the solar cell string, the sunlight can be projected onto the first film strip 200 through the gap between the adjacent two solar cell strings, and onto the second film strip 300 through the gap between the adjacent two cell pieces in the solar cell string.

[0054] The first film strip 200 and the second film strip 300 can reflect sunlight, so that the sunlight is projected onto the back surface of the solar cell string, or the sunlight is projected onto the lower surface of the cover glass, and then the sunlight is reflected to the light-receiving surface of the solar cell string through the lower surface of the cover glass.

[0055] Thus, the photovoltaic module reflects sunlight through the first film strip 200 and the second film strip 300, and in the case of the same irradiation area, the photovoltaic module can reflect the transmitted sunlight, improve the light energy utilization rate of the photovoltaic module, and further improve the power of the photovoltaic module.

[0056] The photovoltaic glass 100 can accommodate the first film strip 200 and the second film strip 300, so that the first film strip 200 and the second film strip 300 do not protrude from the surface of the photovoltaic glass 100, and the first film strip 200 and the second film strip 300 do not apply force to the cell pieces in the solar cell string when the photovoltaic module is laminated, thereby avoiding the problem of cracks at the corners of the cell pieces and improving the yield of the photovoltaic module. In addition, the first film strip 200 and the second film strip 300 can also reflect sunlight at the gap, thereby improving the utilization rate of sunlight.

[0057] The following describes the specific structure of the photovoltaic glass 100 in an embodiment.

[0058] Referring to Figures 1 to 4 In an embodiment, the photovoltaic glass 100 includes a glass base 110, a plurality of first installation grooves 120, and a plurality of second installation grooves 130. The plurality of first installation grooves 120 are recessed on the surface of the glass base 110 facing the solar cell string of the photovoltaic module, extend along the first direction, and are spaced apart along the second direction. The first installation grooves 120 correspond to the spacing between two adjacent solar cell strings, and are used to install the first film strip 200 of the photovoltaic module, so that the surface of the first film strip 200 is coplanar with the surface of the glass base 110.

[0059] The plurality of second installation grooves 130 are recessed on the surface of the glass base 110 facing the solar cell string, and are spaced apart along the first direction. The plurality of second installation grooves 130 extend along the second direction and intersect with the plurality of first installation grooves 120. The second installation grooves 130 correspond to the spacing between two adjacent cell pieces in the solar cell string, and are used to install the second film strip 300 of the photovoltaic module, so that the surface of the second film strip 300 is coplanar with the surface of the glass base 110.

[0060] The glass base 110 is the main plate of the photovoltaic glass 100. The glass base 110 is arranged below the solar cell string and protects the solar cell string below.

[0061] The glass base 110 extends along the first direction and the second direction, as shown in Figure 1 and Figure 2 The first direction is the length direction (left-right direction) of the glass base 110, and the second direction is the width direction (front-rear direction) of the glass base 110. The thickness direction of the glass base 110 is the third direction (not shown) of the glass base 110, i.e., the height direction, the up-down direction, and the top-bottom direction.

[0062] It is worth mentioning that the focus of the present application is how the photovoltaic glass 100 avoids the problem of hidden cracks or broken pieces of cell pieces in the solar cell string while increasing the reflection area. The specific structure of the glass substrate 110 and its packaging process can use the current structure, which will not be described hereinafter.

[0063] The first mounting groove 120 and the second mounting groove 130 of the photovoltaic glass 100 are arranged on the surface of the glass substrate 110 facing the solar cell string, that is, the first mounting groove 120 and the second mounting groove 130 are recessed on the upper surface of the glass substrate 110, the first mounting groove 120 extends along the first direction, and the second mounting groove 130 extends along the second direction.

[0064] In addition, the number of the first mounting groove 120 is multiple, and the multiple first mounting grooves 120 are also arranged along the second direction. The number of the second mounting groove 130 is also multiple, and the multiple second mounting grooves 130 are also arranged along the first direction. Figure 1 And Figure 2 In the first mounting groove 120 and the second mounting groove 130, the multiple first mounting grooves 120 are arranged on the surface of the glass substrate 110 in a staggered manner along the horizontal and vertical directions.

[0065] Each solar cell string extends along the first direction, and multiple solar cell strings are arranged along the second direction. The gap between adjacent solar cell strings corresponds to the first mounting groove 120, and the gap between two adjacent cell pieces in the solar cell string corresponds to the second mounting groove 130.

[0066] The first film strip 200 is arranged in the first mounting groove 120, and the second film strip 300 is arranged in the second mounting groove 130. In this way, the first film strip 200 is located in the gap between two adjacent solar cell strings, and the second film strip 300 is located in the gap between two adjacent cell pieces in the solar cell string.

[0067] When the sunlight is projected through the gap between two adjacent solar cell strings to the first film strip 200 and through the gap between two adjacent cell pieces in the solar cell string to the second film strip 300, the first film strip 200 and the second film strip 300 can reflect solar energy and improve the utilization rate of light energy.

[0068] The present application sets the first mounting groove 120 on the glass substrate 110 to accommodate the first film strip 200, and sets the second mounting groove 130 to accommodate the second film strip. In addition, the top surface of the first film strip 200 is coplanar with the top surface of the glass substrate 110, and the top surface of the second film strip 300 is coplanar with the top surface of the glass substrate 110.

[0069] That is, the first film strip 200 and the second film strip 300 will not protrude from the top surface of the glass substrate 110, and the top surfaces of the first film strip 200, the second film strip 300, and the photovoltaic glass 100 are flush. In this way, the protrusion height of the photovoltaic glass 100 surface can be reduced.

[0070] In the process of preparing photovoltaic modules using the photovoltaic glass 100 of this application, the cover glass, the solar cell string and the photovoltaic glass 100 are subjected to a lamination process. In the lamination process, the laminator applies force to the cover glass, the solar cell string and the photovoltaic glass 100.

[0071] In this application, the first film strip 200 is accommodated by the first mounting groove 120 and the second film strip 300 is accommodated by the second mounting groove 130. After the top surfaces of the first film strip 200 and the second film strip 300 are coplanar with the top surface of the glass substrate 110, the solar cells in the solar cell string can be integrally attached to the top surface of the photovoltaic glass 100 without being supported by several protrusions.

[0072] Because the photovoltaic glass 100 is used in the fabrication of solar cells, the force applied to the cells by the laminator during the lamination process can be transferred to the photovoltaic glass 100, ensuring balanced stress on the cells. This avoids problems such as microcracks or cracks at the edges of the cells caused by the first film strip 200 and the second film strip 300 protruding from the glass substrate 110, thus improving the yield rate of photovoltaic modules in gap lamination.

[0073] The photovoltaic glass 100 of the above embodiment has a first mounting groove 120 on the glass substrate 110 corresponding to the spacing between two adjacent solar cell strings, and a second mounting groove 130 corresponding to the spacing between two adjacent cells in the solar cell string, so that the surface of the first film strip 200 in the first mounting groove 120 is coplanar with the surface of the glass substrate 110, and the surface of the second film strip 300 in the second mounting groove 130 is coplanar with the surface of the glass substrate 110.

[0074] When photovoltaic modules are laminated, the first film strip 200 and the second film strip 300 protrude from the surface of the glass substrate 110, thus avoiding stress on the cells in the solar cell string, preventing the cells from cracking at the edges, improving the yield rate of photovoltaic modules with film at the gaps, and at the same time, the first film strip 200 and the second film strip 300 can also reflect sunlight at the gaps, improving the utilization rate of sunlight.

[0075] See Figure 2 , Figure 3 and Figure 5 In one embodiment, the depth of the first mounting groove 120 is adapted to the thickness of the first membrane strip 200. Figure 5 for Figure 3 A schematic diagram showing the dimensions of the photovoltaic glass 100.Figure 3 In particular, the depth of the first installation groove 120 is h1, and the thickness of the first film strip 200 is d1. The depth h1 of the first film strip 200 is consistent with the thickness d1 of the first film strip 200.

[0076] In this way, after the first film strip 200 is installed in the first installation groove 120, the top surface of the first film strip 200 is flush with the surface of the glass substrate 110, avoiding the top surface of the first film strip 200 protruding from the top surface of the glass substrate 110, and further avoiding problems such as edge corner cracks or broken pieces of the battery piece, thereby ensuring the yield of the photovoltaic module.

[0077] Referring to Figure 2 , Figure 3 and Figure 5 In an embodiment, the first installation groove 120 has a first installation surface 121 and a first flared portion 122. The first installation surface 121 and the first flared portion 122 are recessed in the glass substrate 110 along a first direction. The first flared portion 122 is arranged on both sides of the first installation surface 121 along a second direction, and the first installation surface 121 and the first flared portion 122 form the first installation groove 120.

[0078] The first installation groove 120 is recessed on the surface of the glass substrate 110. The bottom surface of the first installation groove 120 is the first installation surface 121, and the side surface of the first installation groove 120 is the first flared portion 122. The first installation groove 120 and the first flared portion 122 extend along the first direction and have a certain width along the second direction.

[0079] The first flared portion 122 is arranged on both sides of the first installation surface 121 along the second direction, and forms a flared structure on the surface of the glass substrate 110. The first installation surface 121 is used for pasting and installing the first film strip 200, and the first film strip 200 is located in the first flared portion 122 along a third direction (the depth direction of the first installation groove 120 and the thickness direction of the glass substrate 110).

[0080] When the first film strip 200 is installed in the first flared portion 122, the first flared portion 122 can increase the operation space, and the fingers of the operator or mechanical equipment can be inserted into the first flared portion 122, thereby facilitating the installation of the first film strip 200 to the first installation surface 121, avoiding the first film strip 200 being pasted to the edge of the first installation groove 120, and further avoiding problems such as edge corner cracks or broken pieces of the battery piece caused by improper installation of the first film strip 200, thereby ensuring the yield of the photovoltaic module.

[0081] Referring to Figure 2 , Figure 3 and Figure 5In an embodiment of the present application, the first flared portion 122 comprises two first inclined surfaces, which are symmetrically arranged on both sides of the first mounting surface 121 along the second direction. The bottom of the first inclined surface is connected to the edge of the first mounting surface 121, and the top of the first inclined surface is inclined towards the outside of the first mounting groove 120 and is connected to the top surface of the glass substrate 110.

[0082] In this way, the two first inclined surfaces are symmetrically inclined outwardly relative to the first mounting surface 121, so that the first mounting groove 120 has a structure in the form of a horn mouth. Figure 3 As shown in the figure, the first inclined surfaces on both sides of the first mounting groove 120 make the first mounting groove 120 have a structure in the form of an isosceles trapezoid.

[0083] In this way, when the first film strip 200 is attached to the first mounting surface 121, the first inclined surfaces on both sides can reserve an operation space, which facilitates the installation of the first film strip 200 to the first mounting surface 121, avoids the attachment of the first film strip 200 to the edge of the first mounting groove 120, and further avoids the problems of edge corner hidden cracks or broken pieces of the battery sheet caused by improper installation of the first film strip 200, thereby ensuring the yield of the photovoltaic module.

[0084] Of course, in another embodiment of the present application, the first flared portion 122 comprises a first inclined surface and a first vertical surface, which are oppositely arranged on both sides of the first mounting surface 121 along the second direction. That is, one side of the first mounting surface 121 is a first inclined surface, and the other side is a vertical surface.

[0085] The cross section of the first mounting groove 120 has a structure in the form of a right-angle trapezoid. In this way, when the first film strip 200 is attached to the first mounting surface 121, the first inclined surface on one side can also reserve an operation space, which facilitates the installation of the first film strip 200 to the first mounting surface 121 and ensures the yield of the photovoltaic module.

[0086] Referring to Figure 2 , Figure 3 and Figure 5 , in an embodiment, the width dimension of the first mounting surface 121 along the second direction in the first mounting groove 120 is adapted to the width dimension of the first film strip 200 along the second direction. That is, the width dimension of the groove bottom surface of the first mounting groove 120 is consistent with the width dimension of the first film strip 200.

[0087] As shown in Figure 3 and Figure 5 , the width dimension of the first mounting surface 121 along the second direction is m1, and the width dimension of the first film strip 200 along the second direction is m2, wherein the width dimension m1 of the first mounting surface 121 is equal to the width dimension m2 of the first film strip 200. In this way, the gap between adjacent solar cell strings can be adapted, and the reflection effect on sunlight can be ensured.

[0088] Referring to Figure 2 , Figure 3 and Figure 5 , in an embodiment, the width dimension of the first flared portion 122 away from the first mounting surface 121 along the second direction is 0.3mm-1.4mm longer than the width dimension of the first mounting surface 121. The end of the first flared portion 122 away from the first mounting surface 121 is the top of the first flared portion 122.

[0089] The width dimension of the top of the first flared portion 122 along the second direction is m3. The width dimension m3 of the top of the first flared portion 122 is 0.3mm-1.4mm longer than the width dimension m1 of the first mounting surface 121. In this way, installation space can be provided for the installation of the first film strip 200, facilitating the installation of the first film strip 200 to the first mounting surface 121.

[0090] In the embodiment, the width dimension m3 of the top of the first flared portion 122 is 1mm longer than the width dimension m1 of the first mounting surface 121, i.e. the width dimension m3 of the top of the first flared portion 122 is equal to the width dimension m1 of the first mounting surface 121+1mm. Of course, in other embodiments of the present application, the width dimension m3 of the top of the first flared portion 122 can be longer than the width dimension m1 of the first mounting surface 121 by other dimensions.

[0091] In an embodiment, the first mounting groove 120 further comprises a first polished transition surface (not shown) which transitions the first flared portion 122 and the glass substrate 110. The first polished transition surface is provided at the top corner of the first mounting groove 120 to transition the top surface of the first mounting groove 120 and the glass substrate 110.

[0092] That is, the top corner of the first mounting groove 120 is polished to form the first polished transition surface. In this way, the first polished transition surface avoids the edges of the first mounting groove 120 from contacting the battery sheet, thereby reducing the wear of the battery sheet.

[0093] Referring to Figure 2 , Figure 4 and Figure 6 , in an embodiment, the depth of the second mounting groove 130 is adapted to the thickness of the second film strip 300. Figure 6 As shown in the size schematic diagram of the photovoltaic glass 100. In Figure 4 and Figure 4 , the depth dimension of the first mounting groove 120 is h2, and the thickness dimension of the first film strip 200 is d2. The depth h2 of the first mounting groove 120 is consistent with the thickness d2 of the first film strip 200. Figure 6

[0094] ​In this way, after the first film strip 200 is installed into the first mounting groove 120, the top surface of the first film strip 200 can be flush with the surface of the glass substrate 110, avoiding the top surface of the first film strip 200 protruding from the top surface of the glass substrate 110, and thus avoiding problems such as edge corner hidden cracks or broken pieces of the battery piece, and ensuring the yield of the photovoltaic module.

[0095] Referring to Figure 2 、 Figure 4 and Figure 6 In an embodiment, the second mounting groove 130 has a second mounting surface 131 and a second flared portion 132, the second mounting surface 131 and the second flared portion 132 are recessed on the glass substrate 110 along the second direction, and the second flared portion 132 is arranged on both sides of the second mounting surface 131 along the first direction and surrounds the second mounting surface 131 to form the second mounting groove 130.

[0096] The second mounting groove 130 is recessed on the surface of the glass substrate 110, the bottom surface of the second mounting groove 130 is the second mounting surface 131, the side surface of the second mounting groove 130 is the second flared portion 132, the second mounting groove 130 and the second flared portion 132 extend along the second direction and have a certain width along the first direction.

[0097] The second flared portion 132 is arranged on both sides of the second mounting surface 131 along the first direction, and forms a flared structure on the surface of the glass substrate 110. The second mounting surface 131 is used for pasting and mounting the first film strip 200, and the first film strip 200 is located in the second flared portion 132 along the third direction (the depth direction of the second mounting groove 130 and the thickness direction of the glass substrate 110).

[0098] When the second film strip 300 is installed into the second flared portion 132, the second flared portion 132 can increase the operation space, the fingers of the operator or mechanical equipment can be inserted into the second flared portion 132, which facilitates the installation of the second film strip 300 to the second mounting surface 131, avoids the second film strip 300 being pasted to the edge of the second mounting groove 130, and thus avoids problems such as edge corner hidden cracks or broken pieces of the battery piece caused by the first film strip 200 not being installed in place, and ensures the yield of the photovoltaic module.

[0099] Referring to Figure 2 、 Figure 4 and Figure 6 In an embodiment of the present application, the second flared portion 132 includes two second inclined surfaces, and the two second inclined surfaces are symmetrically arranged on both sides of the second mounting surface 131 along the first direction. The bottom of the second inclined surface is connected to the edge of the second mounting surface 131, and the top of the second inclined surface is inclined toward the outside of the second mounting groove 130 and is connected to the top surface of the glass substrate 110.

[0100] Thus, the two second inclined surfaces extend symmetrically outward relative to the second mounting surface 131, so that the second mounting groove 130 has a structure in the form of a trumpet mouth. Figure 4 and Figure 6 As shown in

[0101] Thus, when the second film strip 300 is attached to the second mounting surface 131, the two second inclined surfaces can reserve operation space, facilitating the installation of the second film strip 300 to the second mounting surface 131, avoiding the attachment of the second film strip 300 to the edge of the second mounting groove 130, and further avoiding the problems of edge crack or broken piece of the battery piece caused by improper installation of the second film strip 300, and ensuring the yield of the photovoltaic module.

[0102] Of course, in another embodiment of the present application, the second flared portion 132 includes a second inclined surface and a second vertical surface, and the second inclined surface and the second vertical surface are oppositely arranged on both sides of the second mounting surface 131 along the first direction. That is, one side of the second mounting surface 131 is the second inclined surface, and the other side is the vertical surface.

[0103] The cross section of the second mounting groove 130 has a structure in the form of a right-angled trapezoid. Thus, when the second film strip 300 is attached to the second mounting surface 131, the second inclined surface on one side can also reserve operation space, facilitating the installation of the second film strip 300 to the second mounting surface 131, and ensuring the yield of the photovoltaic module.

[0104] Referring to Figure 2 , Figure 4 and Figure 6 In an embodiment, the width dimension of the second mounting surface 131 along the first direction in the second mounting groove 130 is adapted to the width dimension of the second film strip 300 along the first direction. That is, the width dimension of the groove bottom surface of the second mounting groove 130 is consistent with the width dimension of the second film strip 300.

[0105] As shown in Figure 4 and Figure 6 , the width dimension of the second mounting surface 131 along the first direction is n1, and the width dimension of the second film strip 300 along the first direction is n2, wherein the width dimension n1 of the second mounting surface 131 is equal to the width dimension n2 of the second film strip 300. Thus, the gap between adjacent solar cell strings can be adapted, and the reflection effect on sunlight can be ensured.

[0106] Referring to Figure 2 , Figure 4 and Figure 6In an embodiment, the width dimension of the second flared portion 132 at the end away from the second mounting surface 131 in the first direction is 0.3nn~1.4nn longer than the width dimension of the second mounting surface 131. The end of the second flared portion 132 away from the second mounting surface 131 is the top of the second flared portion 132.

[0107] The width dimension of the top of the second flared portion 132 in the first direction is n3. The width dimension n3 of the top of the second flared portion 132 is 0.3nn~1.4nn longer than the width dimension n1 of the second mounting surface 131. In this way, installation space can be provided for the installation of the second film strip 300, facilitating the installation of the second film strip 300 to the second mounting surface 131.

[0108] In the embodiment, the width dimension n3 of the top of the second flared portion 132 is 1mm longer than the width dimension n1 of the second mounting surface 131, i.e. the width dimension n3 of the top of the second flared portion 132 is equal to the width dimension n1 of the second mounting surface 131+1mm. Of course, in other embodiments of the present application, the width dimension n3 of the top of the first flared portion 122 can be longer than the width dimension n1 of the first mounting surface 121 by other dimensions.

[0109] In an embodiment, the second mounting groove 130 further comprises a second polished transition surface (not shown) which transitions the second flared portion 132 and the glass substrate 110. The second polished transition surface is provided at the top corner of the second mounting groove 130 to transition the top surface of the second mounting groove 130 and the glass substrate 110.

[0110] That is, the top corner of the second mounting groove 130 is polished to form the second polished transition surface. In this way, the second polished transition surface avoids the edges of the second mounting groove 130 from contacting the battery sheet, thereby reducing the wear of the battery sheet.

[0111] Referring to Figure 2 In an embodiment, the photovoltaic glass 100 further comprises a third mounting groove (not shown) which is provided at the intersection of the first mounting groove 120 and the second mounting groove 130 and is recessed from the first mounting groove 120 and the second mounting groove 130.

[0112] It can be understood that the first mounting groove 120 extends in the second direction, the second mounting groove 130 extends in the second direction, and the first mounting groove 120 and the second mounting groove 130 intersect. After the first film strip 200 is provided in the first mounting groove 120 and the second film strip 300 is provided in the second mounting groove 130, the first film strip 200 and the second film strip 300 also intersect.

[0113] The first film strip 200 and the second film strip 300 each have a certain thickness. After the first film strip 200 and the second film strip 300 are stacked, the top surface of the first film strip 200 and the second film strip 300 after being stacked will protrude from the top surface of the glass substrate 110. This will cause the edges of the battery piece to crack during lamination.

[0114] To this end, the third mounting groove is arranged at the intersection of the first mounting groove 120 and the second mounting groove 130. The third mounting groove is arranged in a recessed manner relative to the first mounting groove 120 and the second mounting groove 130. In this way, after the first film strip 200 and the second film strip 300 are stacked at the third mounting groove, the first film strip 200 and the second film strip 300 will not protrude from the top surface of the glass substrate 110. This avoids the problem of the edges of the battery piece cracking during lamination, thereby improving the yield of the photovoltaic module.

[0115] In an embodiment, the depth of the third mounting groove is adapted to the sum of the thicknesses of the first film strip 200 and the second film strip 300. That is, the depth of the third mounting groove is equal to the thickness d1 of the first film strip 200 plus the thickness d2 of the second film strip 300. In this way, the top surface of the first film strip 200 and the second film strip 300 is coplanar with the top surface of the glass substrate 110. This avoids the problem of the edges of the battery piece cracking during lamination, thereby improving the yield of the photovoltaic module.

[0116] In a specific example of the present application, the width m2 of the first film strip 200 is 6 mm, the width m1 of the first mounting surface 121 is 6 mm, the width m3 of the top of the first flared portion 122 is 7 mm, the depth h1 of the first mounting groove 120 is 0.125 mm, and the thickness d1 of the first film strip 200 is 0.125 mm.

[0117] The width n2 of the second film strip 300 is 5 mm, the width n1 of the second mounting surface 131 is 5 mm, the width n3 of the top of the second flared portion 132 is 6 mm, the depth h2 of the second mounting groove 130 is 0.125 mm, and the thickness d2 of the second film strip 300 is 0.125 mm.

[0118] It should be noted that the above-mentioned dimensions of the first mounting groove 120 and the second mounting groove 130 are only an example to illustrate the cooperation of the first mounting groove 120 and the first film strip 200 and the cooperation of the second mounting groove 130 and the second film strip 300. The dimensions of the first mounting groove 120 and the second mounting groove 130 can also be other dimensions as long as they are adapted to the dimensions of the first film strip 200 and the second film strip 300. The present application will not be described in detail.

[0119] In an embodiment, the photovoltaic glass 100 further has a plurality of first accommodating grooves (not shown) recessed on the surface of the glass substrate 110 facing the solar cell string, the plurality of first accommodating grooves extend along the first direction and are spaced along the second direction, and the first accommodating grooves are used to accommodate the conductive connecting pieces of the solar cell string.

[0120] The conductive connecting pieces are components for connecting each cell piece in series in the solar cell string, and the conductive connecting pieces are arranged protruding from the surface of the cell piece. After the first accommodating grooves are arranged on the upper surface of the glass substrate 110, the first accommodating grooves can accommodate the conductive connecting pieces, so that the cell pieces can be attached to the upper surface of the glass substrate 110.

[0121] During lamination, the conductive connecting pieces are located in the first accommodating grooves, so that the conductive connecting pieces can avoid pressing the cell pieces, and the problems such as corner cracks or broken pieces of the cell pieces caused by the conductive connecting pieces protruding and abutting against the glass substrate 110 can be avoided, and the yield of the photovoltaic module is improved.

[0122] In an embodiment, the photovoltaic glass 100 further has a plurality of second accommodating grooves (not shown) recessed on the surface of the glass substrate 110 facing the solar cell string, the plurality of second accommodating grooves extend along the second direction and are spaced along the first direction, and the second accommodating grooves are used to accommodate the bus bars of the solar cell string.

[0123] The bus bars are components for collecting current on the cell pieces in the solar cell string, and the bus bars are arranged protruding from the surface of the cell piece. After the second accommodating grooves are arranged on the upper surface of the glass substrate 110, the second accommodating grooves can accommodate the bus bars, so that the cell pieces can be attached to the upper surface of the glass substrate 110.

[0124] During lamination, the bus bars are located in the second accommodating grooves, so that the bus bars can avoid pressing the cell pieces, and the problems such as corner cracks or broken pieces of the cell pieces caused by the bus bars protruding and abutting against the glass substrate 110 can be avoided, and the yield of the photovoltaic module is improved.

[0125] Referring to Figures 1 to 6 , the photovoltaic glass 100 of the present application accommodates the first film strip 200 through the first mounting groove 120, accommodates the second film strip 300 through the second mounting groove 130, so that the surface of the first film strip 200 in the first mounting groove 120 is coplanar with the surface of the glass substrate 110, and the surface of the second film strip 300 in the second mounting groove 130 is coplanar with the surface of the glass substrate 110. When the photovoltaic module is laminated, the first film strip 200 and the second film strip 300 will not apply force to the cell pieces in the solar cell string, thereby avoiding the problem of broken pieces of the cell pieces at the corners, improving the yield of the photovoltaic module, and at the same time, the first film strip 200 and the second film strip 300 can also reflect sunlight at the gap, improving the utilization rate of sunlight.

[0126] The photovoltaic abrasive grains of the present application, the first film strip 200 is pasted into the first installation slot, the second film strip 300 is pasted into the second installation slot 130, the top surface of the first film strip 200 and the second film strip 300 is flush with the top surface of the photovoltaic glass 100, so that the lamination process does not affect the cell pieces, solves the problem of corner cracks of the cell pieces, and improves the yield of the photovoltaic module.

[0127] At the same time, different specifications of the film strip can be matched with the corresponding installation slot to realize the application of different models of photovoltaic modules, achieve the purpose of reducing cost and increasing light energy utilization rate. And, the first receiving slot and the second receiving slot can also be arranged on the upper surface of the glass substrate 110 to accommodate the conductive connecting piece and the bus bar, thereby reducing the extrusion of the conductive connecting piece and the bus bar on the cell pieces.

[0128] The present application also provides a photovoltaic module, comprising a cover glass, a plurality of solar cell strings, a first film strip 200, a second film strip 300 and a photovoltaic glass 100 according to any one of the above embodiments. The first film strip 200 and the second film strip 300 are arranged on the photovoltaic glass 100, the cover glass is arranged on the light-receiving surface of the plurality of solar cell strings, and the photovoltaic glass 100 is arranged on the back surface of the plurality of solar cell strings.

[0129] The photovoltaic module of the present application uses the photovoltaic glass 100 of the above embodiments, which can increase the light energy utilization rate of the photovoltaic module, and can also accommodate the first film strip 200 and the second film strip 300, thereby avoiding the force on the cell pieces in the solar cell strings during lamination of the photovoltaic module, and further avoiding the problem of corner cracks of the cell pieces, thereby improving the yield of the photovoltaic module.

[0130] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0131] The above 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 ordinary skilled persons 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 protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A photovoltaic glass, characterized in that, The utility model relates to a glass substrate (110) for photovoltaic module, comprising: a plurality of first installation grooves (120) are recessed to the surface of glass substrate (110) towards solar cell string of photovoltaic module, a plurality of first installation grooves (120) extend along the first direction and interval arrangement along the second direction, first installation groove (120) corresponds to the interval of adjacent two solar cell strings, and be used for installing the first film strip (200) of photovoltaic module, make the surface of first film strip (200) with the surface of glass substrate (110) coplanar;And a plurality of second installation grooves (130) are recessed to the surface of glass substrate (110) towards solar cell string and interval arrangement along the first direction, a plurality of second installation grooves (130) extend along the second direction and intersect with a plurality of first installation grooves (120), second installation groove (130) corresponds to the interval of adjacent two cell pieces in solar cell string, and be used for installing the second film strip (300) of photovoltaic module, make the surface of second film strip (300) with the surface of glass substrate (110) coplanar. First installation groove (120) has first installation face (121) with first flared portion (122), first installation face (121) with first flared portion (122) recessed to glass substrate (110) along the first direction, first flared portion (122) is arranged to the two sides of first installation face (121) along the second direction, and with first installation face (121) surrounds first installation groove (120).

2. Photovoltaic glass according to claim 1, characterized in that First flared portion (122) includes two first inclined surfaces, two first inclined surfaces are symmetrically arranged to the two sides of first installation face (121) along the second direction, or, first flared portion (122) includes first inclined surface and first vertical surface, first inclined surface and first vertical surface are oppositely arranged to the two sides of first installation face (121) along the second direction; 3. Photovoltaic glass according to claim 2, characterized in that And / or, first installation groove (120) further includes first polished transition surface, and first polished transition surface is transitionally connected first flared portion (122) with glass substrate (110). Second installation groove (130) has second installation face (131) with second flared portion (132), second installation face (131) with second flared portion (132) recessed to glass substrate (110) along the second direction, second flared portion (132) is arranged to the two sides of second installation face (131) along the first direction, and with second installation face (131) surrounds second installation groove (130).

4. The photovoltaic glass according to claim 1, characterized in that, Second flared portion (132) includes two second inclined surfaces, two second inclined surfaces are symmetrically arranged to the two sides of second installation face (131) along the first direction, or, second flared portion (132) includes second inclined surface and second vertical surface, second inclined surface and second vertical surface are oppositely arranged to the two sides of second installation face (131) along the first direction; 5. Photovoltaic glass according to claim 4, characterized in that ​ And / or, the second installation groove (130) further comprises a second polishing transition surface, the second polishing transition surface transitionally connects the second flared portion (132) and the glass base (110).

6. Photovoltaic glass according to any one of claims 1 to 5, characterized in that In the first installation groove (120), a width dimension of a first installation surface (121) along the second direction is adapted to a width dimension of the first film strip (200) along the second direction; And / or, in the first installation groove (120), a width dimension of an end of a first flared portion (122) away from the first installation surface (121) along the second direction is 0.3mm-1.4mm longer than a width dimension of the first installation surface (121); And / or, in the second installation groove (130), a width dimension of a second installation surface (131) along the first direction is adapted to a width dimension of the second film strip (300) along the first direction; And / or, in the second installation groove (130), a width dimension of an end of a second flared portion (132) away from the second installation surface (131) along the first direction is 0.3mm-1.4mm longer than a width dimension of the second installation surface (131).

7. Photovoltaic glass according to any one of claims 1 to 5, characterized in that A depth of the first installation groove (120) is adapted to a thickness of the first film strip (200); And / or, a depth of the second installation groove (130) is adapted to a thickness of the second film strip (300).

8. Photovoltaic glass according to any one of claims 1 to 5, characterized in that The photovoltaic glass (100) further has a third installation groove, the third installation groove is arranged at an intersection of the first installation groove (120) and the second installation groove (130), and is recessed in the first installation groove (120) and the second installation groove (130); A depth of the third installation groove is adapted to a sum of thicknesses of the first film strip (200) and the second film strip (300).

9. Photovoltaic glass according to any of claims 1 to 5, characterized in that The photovoltaic glass (100) further has a plurality of first containing grooves, the plurality of first containing grooves are recessed arranged on a surface of the glass base (110) facing the solar cell string, the plurality of first containing grooves extend along the first direction and are arranged at intervals along the second direction, and the first containing grooves are used for containing conductive connecting pieces of the solar cell string; And / or, the photovoltaic glass (100) further has a plurality of second containing grooves, the plurality of second containing grooves are recessed arranged on the surface of the glass base (110) facing the solar cell string, the plurality of second containing grooves extend along the second direction and are arranged at intervals along the first direction, and the second containing grooves are used for containing bus bars of the solar cell string.

10. A photovoltaic module, characterized by, The photovoltaic glass (100) comprises a cover glass, a plurality of solar cell strings, a first film strip (200), a second film strip (300), and the photovoltaic glass (100) as claimed in any one of claims 1-9; The first film strip (200) and the second film strip (300) are arranged in the photovoltaic glass (100), the cover glass is arranged on a light-receiving surface of the plurality of solar cell strings, and the photovoltaic glass (100) is arranged on a back surface of the plurality of solar cell strings.

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