CN213660434U

CN213660434U - Photovoltaic module

Info

Publication number: CN213660434U
Application number: CN202022764562.7U
Authority: CN
Inventors: 闫新春
Original assignee: CSI Cells Co Ltd; Canadian Solar Manufacturing Changshu Inc
Current assignee: CSI Cells Co Ltd; Canadian Solar Manufacturing Changshu Inc; CSI Solar Technologies Inc
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2021-07-09
Anticipated expiration: 2030-11-25

Abstract

The utility model discloses a photovoltaic module, photovoltaic module includes: the battery comprises a plurality of battery pieces, wherein two adjacent battery pieces are respectively a first battery piece and a second battery piece, a first grid line electrode is arranged on the first battery piece, a second grid line electrode is arranged on the second battery piece, the end part of the first battery piece is lapped with the end part of the second battery piece to form a lapping region, the first grid line electrode and the second grid line electrode are both positioned in the lapping region, a first bonding piece and a second bonding piece are arranged in the lapping region, the first bonding piece is a conductive bonding piece, the first bonding piece is connected between the first grid line electrode and the second grid line electrode, and the second bonding piece is a non-conductive bonding piece. According to the utility model discloses a photovoltaic module can realize the electricity between two adjacent battery pieces and connect, and can avoid appearing overflowing glue and the problem that effective overlapping area is too little between two adjacent battery pieces, has effectively improved photovoltaic module's reliability, and can avoid appearing the hot spot effect.

Description

Photovoltaic module

Technical Field

The utility model belongs to the technical field of photovoltaic manufacturing technology and specifically relates to a photovoltaic module is related to.

Background

In the related art, the ends of two adjacent cells in the stack are usually connected by conductive adhesive. However, the connection by the conductive adhesive easily causes the problems of adhesive overflow or too small effective overlapping area of two adjacent battery pieces. When glue overflow occurs, short circuit can be caused; when the effective overlapping area of two adjacent battery plates is too small, the resistance at the effective overlapping position is increased, so that the power of the assembly is reduced too fast in the long-term use process.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide a photovoltaic module, photovoltaic module can avoid appearing the excessive problem of gluing and effective overlapping area too little, can effectively improve photovoltaic module's reliability.

According to the utility model discloses photovoltaic module, include: the battery comprises a plurality of battery pieces, wherein two adjacent battery pieces are respectively a first battery piece and a second battery piece, a first grid line electrode is arranged on the first battery piece, a second grid line electrode is arranged on the second battery piece, the end part of the first battery piece is lapped with the end part of the second battery piece to form a lapping region, the first grid line electrode and the second grid line electrode are both positioned in the lapping region, a first bonding piece and a second bonding piece are arranged in the lapping region, the first bonding piece is a conductive bonding piece, the first bonding piece is connected between the first grid line electrode and the second grid line electrode to enable the first battery piece and the second battery piece to be electrically connected, and the second bonding piece is a non-conductive bonding piece.

According to the utility model discloses photovoltaic module, through set up the second bonding piece and connect the first bonding piece between first grid line electrode and second grid line electrode in the overlap region, and make first bonding piece be conductive bonding piece and second bonding piece non-conductive bonding piece, when realizing the electricity connection between two adjacent battery pieces, can avoid appearing overflowing gluey and the problem that effective overlapping area is too little between two adjacent battery pieces, thereby can avoid arousing the short circuit, reduce the resistance of two adjacent battery piece overlapping positions, photovoltaic module's reliability has effectively been improved, and hot spot effect can be avoided appearing.

According to some embodiments of the invention, the first grid line electrode and the second grid line electrode both extend along a length direction of the overlap region; the first bonding piece comprises a plurality of first sub-bonding pieces, and the first sub-bonding pieces are arranged at intervals along the length direction of the first grid line electrode.

According to some embodiments of the present invention, the second bonding member comprises a plurality of second sub-bonding members, and the second sub-bonding members are arranged in a staggered manner with respect to the first sub-bonding members.

According to some embodiments of the invention, the width of the overlap region is w₁Each of the second sub-bonding members includes a plurality of sub-portions arranged along a length direction of the first gate line electrode, each of the sub-portions has a diameter d, wherein w is₁D satisfies: when said w is₁D is not less than 0.6mm and not more than 0.3mm when the diameter is not less than 1 mm; when the said 0.5 is less than or equal to w₁D is more than or equal to 0.2mm and less than or equal to 0.5mm when the diameter is less than 1 mm.

According to some embodiments of the present invention, at least one of the first grid line electrode and the second grid line electrode comprises a plurality of sub-grid line electrodes, the plurality of sub-grid line electrodes being arranged at intervals along a length direction of the overlapping region; the first sub-bonding pieces are electrically connected with the sub-grid electrode electrodes respectively.

According to some embodiments of the invention, the first adhesive member is a resin member containing conductive particles or a PET film containing conductive particles.

According to some embodiments of the invention, adjacent first and second bonds are spaced apart from each other.

According to some embodiments of the invention, the width of the overlap region is w₁SaidThe first adhesive member has a width w in the width direction of the lap joint region₂Wherein, the w₁、w₂Satisfies the following conditions: when w is₁When the thickness is more than or equal to 1mm, w is more than or equal to 0.4mm₂Less than or equal to 1 mm; when w is more than or equal to 0.5₁W is less than 1mm and less than or equal to 0.2mm₂≤0.8mm。

According to some embodiments of the present invention, the length of the first bonding member in the length direction of the lap joint region is L, wherein L satisfies: l is more than or equal to 1 mm.

According to some embodiments of the invention, the height of the first bonding member in the thickness direction of the battery piece is h₁Wherein said h₁Satisfies the following conditions: h is less than or equal to 30 mu m₁≤80μm。

According to some embodiments of the invention, the first bonding member is polygonal, circular, elliptical or oblong in shape.

According to some embodiments of the invention, the second bonding member has a height h in the thickness direction of the battery piece₂Wherein said h₂Satisfies the following conditions: h is not more than 50 mu m₂≤100μm。

According to some embodiments of the present invention, the second bonding member is disposed in the overlapping region by printing or dispensing.

According to some embodiments of the invention, the second bonding member is a silicone bonding member, an epoxy bonding member, or an acrylic bonding member.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic diagram of a cell overlap of a photovoltaic module according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a first adhesive member and a second adhesive member according to an embodiment of the present invention;

fig. 3 is a schematic cross-sectional structure diagram of a photovoltaic module according to an embodiment of the present invention;

fig. 4 is another schematic cross-sectional structure view of a photovoltaic module according to an embodiment of the present invention;

fig. 5 is a schematic view of another cross-sectional structure of a photovoltaic module according to an embodiment of the present invention.

Reference numerals:

1: a battery piece; 11: a first cell piece; 111: a first gate line electrode;

12: a second cell piece; 121: a second gate line electrode;

2: a first adhesive member; 21: a first sub-adhesive member;

3: a second adhesive member; 31: a second sub-adhesive member; 311: and a sub-section.

Detailed Description

Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.

A photovoltaic module according to an embodiment of the present invention is described below with reference to fig. 1 to 5.

As shown in fig. 1 and fig. 2, a photovoltaic module according to an embodiment of the present invention includes a plurality of battery pieces 1. In the description of the present invention, "a plurality" means two or more.

Two adjacent battery slices 1 are respectively a first battery slice 11 and a second battery slice 12, a first grid line electrode 111 is arranged on the first battery slice 11, a second grid line electrode 121 is arranged on the second battery slice 12, the end of the first battery slice 11 is lapped with the end of the second battery slice 12 to form a lapping region, and the first grid line electrode 111 and the second grid line electrode 121 are both located in the lapping region. For example, a plurality of battery cells 1 may be arranged in a shingle manner. So set up, can stack more battery pieces 1 under the unit area to can improve photovoltaic module's generated power and conversion efficiency.

Referring to fig. 2 and 3, a first adhesive member 2 and a second adhesive member 3 are disposed in the overlapping region, the first adhesive member 2 is a conductive adhesive member, the first adhesive member 2 is connected between the first grid line electrode 111 and the second grid line electrode 121 to electrically connect the first battery tab 11 and the second battery tab 12, and the second adhesive member 3 is a non-conductive adhesive member.

Therefore, by adopting the mode of combining the first bonding piece 2 and the second bonding piece 3, the main function of the first bonding piece 2 can be to realize the electric connection between the first battery piece 11 and the second battery piece 12, so that the requirement on the bonding force of the first bonding piece 2 can be reduced, the compatibility of materials is improved, and the ductility of the first bonding piece 2 can be smaller, on one hand, the problem of glue overflow can be avoided, the short circuit can be avoided, and the hot spot effect can be avoided; on the other hand, the width of the first bonding member 2 in the width direction of the lap joint region can be relatively large, so that the effective overlapping area between the first battery piece 11 and the second battery piece 12 can be increased, the resistance of the effective overlapping position can be reduced, the problem that the power of the photovoltaic module is reduced too fast in the long-term use process can be avoided, and the hot spot effect can also be avoided, so that the reliability of the photovoltaic module can be effectively improved; the second adhesive member 3 may be a non-conductive adhesive member, so that the cost of the photovoltaic module may be effectively reduced, and the requirements of large-sized battery pieces 1 (e.g. 210mm) on high adhesion and low cost may be met.

According to the utility model discloses photovoltaic module, through set up second bonding piece 3 and connect the first bonding piece 2 between first grid line electrode 111 and second grid line electrode 121 in the overlap region, and make first bonding piece 2 be electrically conductive bonding piece and second bonding piece 3 is non-electrically conductive bonding piece, when realizing the electricity connection between two adjacent battery pieces 1, can avoid appearing overflowing gluey and the problem that effective overlapping area is too little between two adjacent battery pieces 1, thereby can avoid arousing the short circuit, reduce the resistance of two adjacent battery pieces 1 overlap positions, photovoltaic module's reliability has effectively been improved, and can avoid appearing the hot spot effect.

In some embodiments of the present invention, with reference to fig. 2 and 3, the first gate line electrode 111 and the second gate line electrode 121 both extend along the length direction of the overlapping region, the first bonding member 2 includes a plurality of first sub bonding members 21, and the plurality of first sub bonding members 21 are disposed along the length direction of the first gate line electrode 111 at intervals. For example, eight first sub-adhesives 21 are shown in the example of fig. 2, the eight first sub-adhesives 21 are distributed in the entire length direction of the first gate line electrodes 111, and the width of each first sub-adhesive 21 is smaller than the width of the first gate line electrode 111. Therefore, by providing the plurality of first sub-adhesives 21, the current between the first gate line electrode 111 and the second gate line electrode 121 can be more uniformly transmitted, and thus the electrical connection between the first gate line electrode 111 and the second gate line electrode 121 can be better achieved. It should be noted that, the width of the first sub-bonding member 21 may also be greater than or equal to the width of the first gate line electrode 111, as long as it is ensured that the width of the first sub-bonding member 21 in the width direction of the overlapping region is less than the width of the overlapping region, the present invention is not limited thereto.

Eight first sub-adhesives 21 are shown in fig. 2 for illustrative purposes, but it is obvious to those skilled in the art after reading the technical solution of the present application that the solution can be applied to other numbers of first sub-adhesives 21, which also falls into the protection scope of the present invention.

Further, referring to fig. 2 and 3, the second adhesive member 3 includes a plurality of second sub-adhesive members 31, and the plurality of second sub-adhesive members 31 are staggered from the plurality of first sub-adhesive members 21. For example, nine second sub-adhesives 31 are shown in the example of fig. 2, and one first sub-adhesive 21 is disposed between each adjacent two second sub-adhesives 31. During processing, a plurality of first sub-bonding pieces 21 can be firstly bonded on the first grid line electrode 111 of the first battery piece 11 to be laminated, then a plurality of second sub-bonding pieces 31 are arranged between two adjacent first sub-bonding pieces 21 and between the first sub-bonding pieces 21 at the edge and the edge of the battery piece 1, and then the end part of the second battery piece 12 is lapped on the end part of the first battery piece 11, so that the first grid line electrode 111 and the second grid line electrode 121 are electrically connected through the plurality of first sub-bonding pieces 21, and the first battery piece 11 and the second battery piece 12 are firmly bonded through the plurality of second sub-bonding pieces 31. The second sub-adhesive 31 may be connected between the first gate line electrode 111 and the second gate line electrode 121. Therefore, by arranging the plurality of second sub-bonding members 31 and the plurality of first sub-bonding members 21 in a staggered manner, the plurality of second sub-bonding members 31 can make the connection between the first battery piece 11 and the second battery piece 12 more secure, so that the plurality of first sub-bonding members 21 can be more stably connected between the first grid line electrode 111 and the second grid line electrode 121, and further, the electrical connection between two adjacent battery pieces 1 is more reliable.

In some embodiments of the present invention, the width of the overlap region is w₁Each of the second sub-adhesives 31 includes a plurality of sub-portions 311 arranged along the length direction of the first gate line electrode 111, and each of the sub-portions 311 has a diameter d, where w₁D satisfies: when w is₁D is not less than 0.6mm and not more than 0.3mm when the diameter is not less than 1 mm; when w is more than or equal to 0.5₁D is more than or equal to 0.2mm and less than or equal to 0.5mm when the diameter is less than 1 mm. Here, the diameter of each sub-portion 311 may be understood as the diameter of each sub-portion 311 before the end portions of two adjacent battery sheets 1 are overlapped, and the diameter of each sub-portion 311 is increased when the end portions of two adjacent battery sheets 1 are overlapped.

For example, the second adhesive member 3 may be printed or dispensed in the overlapping region to form a plurality of sub-portions 311, where each sub-portion 311 is substantially circular. When w is₁When d is larger than or equal to 1mm, if d is smaller than 0.3mm, the diameter of each sub-portion 311 is too small, which may affect the adhesion firmness between two adjacent battery pieces 1; if d is greater than 0.6mm, the diameter of each sub-portion 311 is too large, and the problem of glue overflow may occur after the end portions of two adjacent cells 1 are overlapped, thereby affecting the appearance and the beauty of the photovoltaic module.

Similarly, when 0.5. ltoreq. w₁If d is less than 0.2mm, the diameter of each sub-portion 311 is too small, which may affect the adhesion between two adjacent battery pieces 1; if d is greater than 0.5mm, the diameter of each sub-portion 311 is too large, and the problem of glue overflow may occur after the end portions of two adjacent cells 1 are overlapped, thereby affecting the appearance and the beauty of the photovoltaic module. Thereby, by making w₁D is full ofFoot: when w is₁D is not less than 0.6mm and not more than 0.3mm when the diameter is not less than 1 mm; when w is more than or equal to 0.5₁When the diameter is less than 1mm, d is more than or equal to 0.2mm and less than or equal to 0.5mm, the diameter of each sub-portion 311 is reasonable, the firm connection between two adjacent battery pieces 1 is effectively ensured, and meanwhile, the problem of glue overflow can be avoided, so that the appearance attractiveness of the photovoltaic module can be ensured.

When the second adhesive 3 is provided in the overlapping region by printing, the second adhesive 3 may be in a long shape, in which case the width of the second adhesive 3 in the width direction of the overlapping region may be w, and when w is w₁When the thickness is more than or equal to 1mm, w is more than or equal to 0.3mm and less than or equal to 0.6 mm; when w is more than or equal to 0.5₁When the thickness is less than 1mm, w is more than or equal to 0.2mm and less than or equal to 0.5 mm.

In some embodiments of the present invention, at least one of the first grid line electrode 111 and the second grid line electrode 121 includes a plurality of sub-grid line electrodes, the plurality of sub-grid line electrodes are disposed along the length direction of the overlapping region at intervals, and the plurality of first sub-bonding members 21 are electrically connected to the plurality of sub-grid line electrodes respectively. For example, each sub-grid electrode may be rectangular, elliptical, or the like. Therefore, by arranging the plurality of sub-grid line electrodes, the first grid line electrode 111 and/or the second grid line electrode 121 are designed in a sectional manner, the plurality of sub-grid line electrodes on each cell piece 1 can be electrically connected with the first grid line electrode 111 or the second grid line electrode 121 on the adjacent cell piece 1 through the plurality of first sub-bonding pieces 21, so that reliable electrical connection between the two adjacent cell pieces 1 can be ensured, and the plurality of sub-grid line electrodes can effectively reduce the use amount of paste such as silver paste, so that the production cost of the photovoltaic module is reduced. The number of the sub-grid electrodes on each cell 1 may be more than six.

Of course, the first gate line electrode 111 and the second gate line electrode 121 may also be formed in a structure extending linearly along the length direction of the overlap region. The utility model discloses do not limit to this.

In some embodiments of the present invention, the first bonding member 2 may be a resin member with a back adhesive and containing conductive particles, or a PET (Polyethylene terephthalate) film containing conductive particles, or the like. From this, because resin spare and PET membrane are inextensible, after the tip overlap joint of two adjacent battery pieces 1, the size of first bonding piece 2 can not increase to can effectively avoid because the problem of the short circuit that the excessive glue leads to or produce the hot spot, effectively improve photovoltaic module's reliability. Moreover, the width of the first bonding piece 2 can be wider, so that the contact area between the first bonding piece 2 and the first grid line electrode 111 and the second grid line electrode 121 can be increased, the electric connection between two adjacent battery pieces 1 is more reliable, and the problem that the power of the photovoltaic module is reduced too fast in the long-term use process is effectively solved.

Further, as shown in fig. 2 and 3, adjacent first and second adhesives 2 and 3 are spaced apart from each other. For example, the second adhesive 3 may be a silicone adhesive, an epoxy adhesive, or an acrylic adhesive. Therefore, the first grid line electrode 111 and the second grid line electrode 121 can be fully electrically contacted through the first bonding piece 2, the problem that the electric connection between two adjacent battery pieces 1 is influenced due to the contact of the second bonding piece 3 and the first bonding piece 2 is avoided, a large effective overlapping area can be ensured to be formed between the two adjacent battery pieces 1, and the long-term reliability of the photovoltaic module is further improved.

In some embodiments of the present invention, the width of the overlap region is w₁The width of the first adhesive member 2 in the width direction of the lap joint region is w₂Wherein w is₁、w₂Satisfies the following conditions: when w is₁When the thickness is more than or equal to 1mm, w is more than or equal to 0.4mm₂Less than or equal to 1 mm; when w is more than or equal to 0.5₁W is less than 1mm and less than or equal to 0.2mm₂Less than or equal to 0.8 mm. Specifically, for example, when w₁When w is more than or equal to 1mm, in this case₂If the width of the first adhesive piece 2 in the width direction of the lap joint region is too small, the electrical connection between the first grid line electrode 111 and the second grid line electrode 121 may be affected, so that the effective overlapping area between the first cell piece 11 and the second cell piece 12 is too small, and the power of the photovoltaic module may be reduced too fast in the long-term use process, and a hot spot effect may occur; if w is₂> 1mm, the width of the first adhesive 2 in the width direction of the overlap region is too large, so that the first adhesive 2 may extend beyondThe lap area may cause a short circuit.

Similarly, when 0.5. ltoreq. w₁< 1mm, when w is₂If the width of the first adhesive piece 2 in the width direction of the lap joint region is too small, the electrical connection between the first grid line electrode 111 and the second grid line electrode 121 may be affected, so that the effective overlapping area between the first cell piece 11 and the second cell piece 12 is too small, and the power of the photovoltaic module may be reduced too fast in the long-term use process, and a hot spot effect may occur; if w is₂(> 0.8 mm), the width of the first adhesive 2 in the width direction of the lap area is too large, so that the first adhesive 2 may extend beyond the lap area, possibly causing a short circuit. Thereby, by making w₁、w₂Satisfies the following conditions: when w is₁When the thickness is more than or equal to 1mm, w is more than or equal to 0.4mm₂Less than or equal to 1 mm; when w is more than or equal to 0.5₁W is less than 1mm and less than or equal to 0.2mm₂Less than or equal to 0.8mm, the width of first bonding piece 2 is comparatively reasonable, can avoid arousing the short circuit when guaranteeing the reliable electricity connection between two adjacent battery pieces 1 to can avoid photovoltaic module power decline too fast in long-term use, and can avoid appearing the hot spot effect.

In some embodiments of the present invention, the length of the first bonding member 2 in the length direction of the lap joint region is L, wherein L satisfies: l is more than or equal to 1 mm. Therefore, the length of the first adhesive piece in the length direction of the lap joint region is larger, so that the contact area between the first adhesive piece 2 and the first grid line electrode 111 and the second grid line electrode 121 can be increased, and the electric connection between the first battery piece 11 and the second battery piece 12 is more reliable.

In some embodiments of the present invention, the height of the first bonding member 2 in the thickness direction of the battery sheet 1 is h₁Wherein h is₁Satisfies the following conditions: h is less than or equal to 30 mu m₁Less than or equal to 80 mu m. For example, when h₁If the height of the first bonding member 2 in the thickness direction of the battery piece 1 is too small, the conductivity of the first bonding member 2 may be affected, and thus the electrical connection between two adjacent battery pieces 1 is affected; when h is generated₁If the thickness is larger than 80 μm, the height of the first adhesive member 2 in the thickness direction of the battery sheet 1 is too largeAnd the adhesion between the second adhesive member 3 and the adjacent two battery cells 1 may be affected. Thereby, by making h₁Satisfies the following conditions: h is less than or equal to 30 mu m₁The height of the first bonding piece 2 in the thickness direction of the battery piece 1 is reasonable, so that the reliability of the electric connection between two adjacent battery pieces 1 can be improved; on the other hand, two adjacent battery plates 1 can be firmly connected through the second bonding piece 3, so that the reliability of the photovoltaic module can be improved.

Alternatively, the first adhesive member 2 may be polygonal in shape. For example, when the first adhesive member 2 has a rectangular shape, the first adhesive member 2 may have a strip shape, and the first adhesive member 2 may be wound into a roll for easy carrying and transportation.

Of course, the shape of the first adhesive member 2 may be circular, oval, oblong, etc. For example, in the example of fig. 2, the projection of each first sub-adhesive 21 on the overlap area is an ellipse. It is understood that the shape of the first adhesive member 2 can be specifically set according to actual requirements to better meet the actual application.

In some embodiments of the present invention, the height of the second adhesive member 3 in the thickness direction of the battery sheet 1 is h₂Wherein h is₂Satisfies the following conditions: h is not more than 50 mu m₂Less than or equal to 100 mu m. For example, when h₂If the thickness of the second adhesive member 3 is less than 50 μm, the height of the second adhesive member 3 in the thickness direction of the battery piece 1 may be too small, which may affect the adhesion reliability between two adjacent battery pieces 1; when h is generated₂When the height of the second adhesive member 3 in the thickness direction of the cell sheet 1 is larger than 100 μm, the problem of glue overflow may occur after two adjacent cell sheets 1 are lapped, so that the appearance attractiveness of the photovoltaic module is affected, and the electrical connection between the first adhesive member 2 and the first and second

grid line electrodes

111 and 121 may be affected. Thereby, by making h₂Satisfies the following conditions: h is not more than 50 mu m₂Less than or equal to 100 mu m, the height of the second bonding piece 3 in the thickness direction of the cell pieces 1 is reasonable, and the glue overflow can be avoided while the firm bonding between two adjacent cell pieces 1 is realized, so that the appearance attractiveness of the photovoltaic module can be ensured, and the electric connection between two adjacent cell pieces 1 can be more reliable. It is composed ofIn this specification, the height of the second adhesive member 3 is understood to be the height of the second adhesive member 3 before the ends of two adjacent battery sheets 1 are overlapped, and when the ends of two adjacent battery sheets 1 are overlapped, the height of the second adhesive member 3 is reduced accordingly (for example, reduced to be equal to the height of the first adhesive member 2).

Other configurations, etc. and operations of photovoltaic modules according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A photovoltaic module, comprising:

the battery comprises a plurality of battery pieces, wherein two adjacent battery pieces are respectively a first battery piece and a second battery piece, a first grid line electrode is arranged on the first battery piece, a second grid line electrode is arranged on the second battery piece, the end part of the first battery piece is lapped with the end part of the second battery piece to form a lapping region, the first grid line electrode and the second grid line electrode are both positioned in the lapping region, a first bonding piece and a second bonding piece are arranged in the lapping region, the first bonding piece is a conductive bonding piece, the first bonding piece is connected between the first grid line electrode and the second grid line electrode to enable the first battery piece and the second battery piece to be electrically connected, and the second bonding piece is a non-conductive bonding piece.

2. The photovoltaic module of claim 1, wherein the first grid line electrode and the second grid line electrode each extend along a length of the overlap region;

the first bonding piece comprises a plurality of first sub-bonding pieces, and the first sub-bonding pieces are arranged at intervals along the length direction of the first grid line electrode.

3. The photovoltaic module of claim 2, wherein the second adhesive comprises a plurality of second sub-adhesives staggered from the plurality of first sub-adhesives.

4. The photovoltaic module of claim 3, wherein the overlap region has a width w₁，

Each of the second sub-bonding pieces includes a plurality of sub-portions arranged along a length direction of the first gate line electrode, each of the sub-portions has a diameter d, wherein w is₁D satisfies:

when saidw₁D is not less than 0.6mm and not more than 0.3mm when the diameter is not less than 1 mm;

when the said 0.5 is less than or equal to w₁D is more than or equal to 0.2mm and less than or equal to 0.5mm when the diameter is less than 1 mm.

5. The photovoltaic module of claim 2, wherein at least one of the first grid line electrode and the second grid line electrode comprises a plurality of sub-grid line electrodes, and the plurality of sub-grid line electrodes are arranged at intervals along the length direction of the lap joint region;

the first sub-bonding pieces are electrically connected with the sub-grid electrode electrodes respectively.

6. The photovoltaic module according to claim 1, wherein the first adhesive member is a resin member containing conductive particles or a PET film containing conductive particles.

7. The photovoltaic module of claim 1, wherein adjacent first and second adhesives are spaced apart from each other.

8. The photovoltaic module of any of claims 1-7 wherein the overlap region has a width w₁The width of the first adhesive member in the width direction of the lap joint region is w₂Wherein, the w₁、w₂Satisfies the following conditions:

when w is₁When the thickness is more than or equal to 1mm, w is more than or equal to 0.4mm₂≤1mm；

When w is more than or equal to 0.5₁W is less than 1mm and less than or equal to 0.2mm₂≤0.8mm。

9. The photovoltaic module of any of claims 1-7, wherein the first adhesive has a length L in the lengthwise direction of the overlap region, wherein L satisfies: l is more than or equal to 1 mm.

10. The photovoltaic module of any of claims 1-7 wherein the first adhesive is on the cellThe height of the sheet in the thickness direction is h₁Wherein said h₁Satisfies the following conditions: h is less than or equal to 30 mu m₁≤80μm。

11. The photovoltaic module of any of claims 1-7 wherein the first adhesive member is polygonal, circular, elliptical, or oblong in shape.

12. The photovoltaic module according to any one of claims 1 to 7, wherein the second adhesive member has a height h in the thickness direction of the cell sheet₂Wherein said h₂Satisfies the following conditions: h is not more than 50 mu m₂≤100μm。

13. The photovoltaic module of any of claims 1-7 wherein the second adhesive is printed or dispensed within the lap joint region.

14. The photovoltaic module of any of claims 1-7 wherein the second adhesive is a silicone adhesive, an epoxy adhesive, or an acrylic adhesive.