CN216488093U - Photovoltaic module - Google Patents

Abstract

The utility model discloses a photovoltaic module belongs to photovoltaic module technical field. Photovoltaic module includes a plurality of battery pieces and photovoltaic solder strip, is provided with the electrode on the battery piece, and the photovoltaic solder strip includes: the first connecting section is used for welding the electrode on the first surface of one of two adjacent battery pieces and comprises a plurality of first welding strips and second welding strips which are arranged at intervals, the first welding strips comprise first welding layers and first reflecting layers arranged relative to the first welding layers, included angles are formed between the first reflecting layers and the first welding layers, and the welding width of the second welding strips to the electrode is larger than that of the first welding layers to the electrode; and a second connection section extending toward the first connection section, the second connection section being for welding to an electrode of the second surface of the other of the adjacent two battery chips. The utility model discloses can make photovoltaic module all higher to the collection efficiency and the utilization efficiency of solar energy simultaneously.

Description

Photovoltaic module

Technical Field

The utility model relates to a photovoltaic module technical field especially relates to a photovoltaic module.

Background

In recent years, with the rapid development of photovoltaic modules, the requirements corresponding to photovoltaic solder ribbons in photovoltaic modules have been increasing. The photovoltaic module also comprises a plurality of battery pieces, and the photovoltaic welding strips are welded on the front and back of the adjacent battery pieces at intervals, so that the plurality of battery pieces are mutually connected in series or in parallel, and the photovoltaic module can convert solar energy into electric energy; and the photovoltaic solder strip has good electric conductivity, and the electric energy generated by the photovoltaic component through converting solar energy is transmitted to the electric equipment through the photovoltaic solder strip, so that the quality of the photovoltaic solder strip directly influences the collection efficiency and the utilization efficiency of the photovoltaic component on the solar energy.

The solar cell piece depends on the surface of the solar cell piece to receive sunlight, when the photovoltaic welding strip is welded on the surface of the solar cell piece, the photovoltaic welding strip shields part of the structure of the surface of the solar cell piece, so that the area of the solar cell piece capable of receiving the sunlight is reduced, the sunlight directly irradiating the solar cell piece is reduced, and the solar energy collection efficiency of the solar cell piece is reduced.

In order to solve the above problems, the photovoltaic solder strip is arranged to be of a cylindrical structure, the contact area between the cylindrical structure and the battery piece is small, so that the welding area of the photovoltaic solder strip on the battery piece is reduced, the problem that the light receiving area of the battery piece is small due to shielding of the photovoltaic solder strip can be effectively solved, and the light receiving amount of the battery piece can be increased.

However, the photovoltaic solder strip is arranged into a cylindrical structure, so that the welding lamination of the photovoltaic solder strip is small, unstable welding between the photovoltaic solder strip and the battery piece is easily caused, and the photovoltaic solder strip is easily separated from the battery piece; meanwhile, the contact area between the photovoltaic welding strip and the cell is reduced, so that the cross-sectional area of the current passing through the photovoltaic welding strip is smaller, the resistance of the current passing through the photovoltaic welding strip is larger, the current transmitted to electric equipment through the photovoltaic welding strip is smaller, and the utilization efficiency of the cell on solar energy is reduced.

In view of the above, a photovoltaic device is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a photovoltaic module can make it all higher to solar energy collection efficiency and utilization efficiency simultaneously.

To achieve the purpose, the utility model adopts the following technical proposal:

a photovoltaic module, includes a plurality of battery pieces and photovoltaic solder strip, be provided with the electrode on the battery piece, the photovoltaic solder strip includes:

a first connection section for welding to the electrode on the first surface of one of two adjacent battery pieces, the first connection section including a plurality of first welding strips and second welding strips arranged at intervals, the first welding strips including a first welding layer and a first reflection layer arranged opposite to the first welding layer, an included angle being formed between the first reflection layer and the first welding layer, and a welding width of the second welding strips to the electrode being greater than a welding width of the first welding layer to the electrode;

a second connection segment extending toward the first connection segment, the second connection segment being for welding to the electrode on the second surface of the other of the adjacent two of the battery pieces.

Further, the second surface is disposed opposite to the first surface, and the second connection section includes a plurality of first solder strips and second solder strips disposed at intervals.

Further, the welding width of the second welding strip to the electrode is smaller than or equal to the width of the electrode.

Further, the photovoltaic solder strip still includes:

the transition section is connected between the first connecting section and the second connecting section, the transition section is suspended between two adjacent battery pieces, and the transition section, the first connecting section and the second connecting section are made of different materials.

Further, the cross-sectional shape of the first solder strip is circular, triangular, semicircular or trapezoidal.

Further, the first solder strip further comprises a first metal layer, and the first solder layer and the first reflective layer are respectively disposed on a bottom end surface and a non-bottom end surface of the first metal layer.

Further, the second welding strip comprises a second welding layer, a second reflecting layer and a second metal layer, the second metal layer is used for connecting the second welding layer with the second reflecting layer, the second welding layer is welded to the electrode, the welding width of the second welding layer welded to the electrode is larger than that of the first welding layer welded to the electrode, and the first welding strip and the second welding strip are made of different materials.

Further, the second metal layer is disposed in parallel between the second soldering layer and the second reflecting layer which are parallel to each other.

Furthermore, an included angle is formed between the second reflecting layer and the second welding layer, and the second welding layer and the second reflecting layer are respectively arranged on the bottom end face and the non-bottom end face of the second metal layer.

Further, the number of the first connecting section, the second connecting section and the transition section is provided with a plurality of.

The utility model has the advantages that:

welding a second connecting section to the electrode of the second surface of the other of the two adjacent battery pieces by welding the first connecting section to the electrode of the first surface of one of the two adjacent battery pieces, thereby connecting the adjacent plurality of battery pieces to each other by the photovoltaic welding strip to form a photovoltaic module; an included angle is formed between the first reflecting layer of the first welding strip and the first welding layer, namely the first reflecting layer is obliquely arranged relative to the cell, so that sunlight obliquely irradiating the first welding strip and sunlight vertically irradiating the first welding strip can be reflected onto the cell through the first reflecting layer, the cell can receive more sunlight, and the solar energy collection efficiency of the cell is higher; meanwhile, the welding width of the second welding strip of the first connecting section to the electrode is larger than that of the first welding layer to the electrode, namely the welding area between the second welding strip and the cell can be increased relative to the first welding strip, so that on one hand, the welding area between the first connecting section and the cell can be larger, the welding between the first connecting section and the cell is more stable, and the problem that the photovoltaic welding strip falls off from the cell cannot occur; on the other hand because the area of contact between second solder strip and the battery piece is great for the cross-sectional area that the electric current passes through on the second solder strip is great, thereby makes the resistance that receives when the electric current passes through whole first linkage segment less, so that the electric current that transmits to consumer through photovoltaic solder strip is great, makes the battery piece higher to the utilization efficiency of solar energy.

Drawings

Fig. 1 is a schematic structural diagram of a photovoltaic module provided by the present invention;

fig. 2 is a schematic structural diagram of a first solder strip provided by the present invention.

Reference numerals:

11-a first connection section; 111-a first solder strip; 1111-a first solder layer; 1112-a first reflective layer; 1113-first metal layer; 112-a second solder strip; 12-a second connection segment; 13-a transition section;

2-battery piece.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

Any feature disclosed in this specification may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features. Like reference numerals refer to like elements throughout the specification.

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

At present, a photovoltaic welding strip is set to be a cylindrical structure, the contact area between the cylindrical structure and a battery piece is small, so that the welding area of the photovoltaic welding strip on the battery piece is reduced, the problem that the light receiving area of the battery piece is small due to shielding of the photovoltaic welding strip can be effectively solved, and the light receiving amount of the battery piece can be increased; however, the photovoltaic solder strip is arranged into a cylindrical structure, so that the welding lamination of the photovoltaic solder strip is small, unstable welding between the photovoltaic solder strip and the battery piece is easily caused, and the photovoltaic solder strip is easily separated from the battery piece; meanwhile, the contact area between the photovoltaic welding strip and the cell is reduced, so that the cross-sectional area of the current passing through the photovoltaic welding strip is smaller, the resistance of the current passing through the photovoltaic welding strip is larger, the current transmitted to electric equipment through the photovoltaic welding strip is smaller, and the utilization efficiency of the cell on solar energy is reduced.

To this end, the photovoltaic module is provided in this embodiment, and both the collection efficiency and the utilization efficiency of solar energy by the photovoltaic module can be realized simultaneously. Specifically, as shown in fig. 1 and 2, the photovoltaic module includes a plurality of cells 2 and a photovoltaic solder ribbon, an electrode is disposed on the cell 2, and the photovoltaic solder ribbon includes a first connection segment 11 and a second connection segment 12; wherein the first connection segment 11 is used for welding on an electrode on a first surface of one of two adjacent battery plates 2, the first surface is configured to absorb sunlight, the first connection segment 11 comprises a plurality of first welding strips 111 and second welding strips 112 arranged at intervals, the first welding strips 111 comprise a first welding layer 1111 and a first reflection layer 1112 arranged opposite to the first welding layer 1111, an included angle is formed between the first reflection layer 1112 and the first welding layer 1111, and the welding width of the second welding strips 112 to the electrode is larger than that of the first welding layer 1111 to the electrode; the second connection segment 12 extends toward the first connection segment 11, and the second connection segment 12 is used for welding on an electrode on the second surface of the other of the two adjacent battery pieces 2.

The plurality of cell pieces 2 are connected to each other by the photovoltaic solder ribbon to form the photovoltaic module by soldering the first connection section 11 to the electrode of the first surface of one of the adjacent two cell pieces 2 and soldering the second connection section 12 to the electrode of the second surface of the other of the adjacent two cell pieces 2.

Compared with the prior art, the structure of the photovoltaic solder strip is changed in the photovoltaic module in this embodiment, so that an included angle is formed between the first reflective layer 1112 and the first solder layer 1111 of the first solder strip 111 of the first connection section 11, that is, the first reflective layer 1112 is disposed in an inclined manner with respect to the cell piece 2, so that both sunlight obliquely irradiated to the first solder strip 111 and sunlight perpendicularly irradiated to the first solder strip 111 can be reflected to the cell piece 2 through the first reflective layer 1112, the cell piece 2 can receive more sunlight, and the solar energy collection efficiency of the cell piece 2 is high; meanwhile, the welding width of the second welding strip 112 of the first connection section 11 to the electrode is greater than that of the first welding layer 1111 to the electrode, that is, the welding area between the second welding strip 112 and the cell 2 is increased relative to the first welding strip 111, so that on one hand, the welding area between the first connection section 11 and the cell 2 is larger, the welding between the first connection section 11 and the cell 2 is more stable, and the problem that the photovoltaic welding strip falls off from the cell 2 is avoided; on the other hand, because the contact area between the second solder strip 112 and the cell piece 2 is large, the cross-sectional area of the current passing through the second solder strip 112 is large, so that the resistance of the current passing through the whole first connection section 11 is small, the current transmitted to the electric equipment through the photovoltaic solder strip is large, and the utilization efficiency of the cell piece 2 on solar energy is high; in this way, the photovoltaic module can simultaneously realize higher solar energy collection efficiency and utilization efficiency. The reflection path of the sunlight on the first solder strip 111 is shown by an arrow a in fig. 2.

It is worth to be noted that, the first connection section 11 and the second connection section 12 are both welded on the electrode of the cell piece 2, on one hand, since the electrode can shield part of the structure on the cell piece 2, and then the first connection section 11 and the second connection section 12 are welded on the electrode, as long as the welding width of the first connection section 11 and the second connection section 12 on the electrode is ensured to be matched with the width of the electrode, the problem that the welding width of the first connection section 11 and the second connection section 12 on the electrode is increased to shield part of the structure on the cell piece 2 does not occur, and therefore other structures on the cell piece 2 are not shielded, so that the cell piece 2 can receive more sunlight, and the collection efficiency of the cell piece 2 on solar energy is higher; on the other hand, the electrode can provide a welding positioning effect for welding the first connecting section 11 and the second connecting section 12 on the battery piece 2, so that the welding of the first connecting section 11 and the second connecting section 12 on the battery piece 2 is prevented from deviating, and the welding effect of the first connecting section 11 and the second connecting section 12 on the battery piece 2 is ensured.

Specifically, the welding width of the second welding strip 112 to the electrode is less than or equal to the width of the electrode, so that the welding area between the second welding strip 112 and the battery piece 2 can be increased while other positions on the battery piece 2 are not shielded, the welding width of the first connecting section 11 and the second connecting section 12 on the electrode is matched with the width of the electrode, and the welding width of the second welding strip 112 does not shield other structures on the battery piece 2.

Further, a second surface is disposed opposite to the first surface, the second surface being configured to absorb sunlight, and thus, as shown in fig. 1, the second connection section 12 includes a plurality of the above-described first solder strips 111 and second solder strips 112 disposed at intervals from each other. In this embodiment, the number of the first solder strips 111 and the second solder strips 112 on the first connection section 11 is set to four and three, respectively, and the number of the first solder strips 111 and the second solder strips 112 on the second connection section 12 is set to four and three, respectively. In other embodiments, the number of the first solder strips 111 and the second solder strips 112 may be set to other numbers, and the specific number is not particularly limited.

By enabling the second connection section 12 to also include the first solder strip 111 and the second solder strip 112, when the second surface receives sunlight, it can be ensured that the second connection section 12 can also achieve that both the sunlight obliquely irradiated to the first solder strip 111 of the second connection section 12 and the sunlight perpendicularly irradiated to the first solder strip 111 can be reflected to the cell piece 2 through the first reflection layer 1112 of the second connection section 12, so that the cell piece 2 can receive more sunlight, and the solar energy collection efficiency of the cell piece 2 is high; and simultaneously, the welding area between the second welding strip 112 of the second connecting section 12 and the battery piece 2 can be maximally increased while other positions on the second surface of the battery piece 2 are not shielded.

Therefore, the photovoltaic solder strip in the embodiment is particularly suitable for the two-sided light receiving type cell 2, so that the formed photovoltaic module is a two-sided light receiving type photovoltaic module.

Specifically, as shown in fig. 1, the photovoltaic solder strip further includes a transition section 13, the transition section 13 is connected between the first connection section 11 and the second connection section 12, and the transition section 13 is suspended between two adjacent battery pieces 2. Wherein, the changeover portion 13 is made by flexible material, and the changeover portion 13 has certain length of predetermineeing, weld respectively in two battery slices 2 when the photovoltaic solder strip, because the first surface on the battery slice 2 sets up with the second surface is relative, consequently the changeover portion 13 just in time is located between two battery slices 2, in order to play the transition effect, avoided the welding stress influence each other of first linkage segment 11 and second linkage segment 12, improved the stability of first linkage segment 11 and second linkage segment 12 welding to battery slice 2.

It can be understood that, since the transition section 13 is suspended between two adjacent cell pieces 2, the absorption of sunlight by the cell pieces 2 is not affected, and the transition section 13 is not in a welding relationship with the cell pieces 2, the structure and the size of the transition section 13 may not be particularly limited. In the present embodiment, the structure of the transition section 13 is set to be the same as that of the second solder fillet 112.

Specifically, the number of first linkage segment 11, second linkage segment 12 and changeover portion 13 all is provided with a plurality ofly, and first linkage segment 11, changeover portion 13 and second linkage segment 12 interval set gradually to interconnect a plurality of battery pieces 2 in order to form photovoltaic module. It should be noted that the transition section 13, the first connection section 11 and the second connection section 12 may be made of different materials or the same material, so that the transition section 13, the first connection section 11 and the second connection section 12 can respectively and maximally implement their respective functions.

Further, the cross-sectional shape of the first solder fillet 111 is circular, triangular, semicircular, or trapezoidal. In this embodiment, the cross-sectional shape of the first solder fillet 111 is triangular. In other embodiments, the cross-sectional shape of the first solder fillet 111 may be circular, semicircular, trapezoidal, elliptical, or other irregular shapes.

Specifically, as shown in fig. 2, the first solder ribbon 111 further includes a first metal layer 1113, a first solder layer 1111 and a first reflective layer 1112 are respectively disposed on a bottom end surface and a non-bottom end surface of the first metal layer 1113, the first solder layer 1111 is configured to be soldered to an electrode of the cell piece 2, the first reflective layer 1112 is configured to reflect sunlight onto the cell piece 2, and the first metal layer 1113 is electrically conductive to conduct electric energy converted from solar energy to an electric device through the first metal layer 1113. The first metal layer 1113 is made of a material with good electrical conductivity, such as copper, silver, gold, and alloys thereof, and the first reflective layer 1112 and the first solder layer 1111 are made of a material with good soldering performance and good light reflection performance, such as tin, silver, lead, bismuth, and alloys thereof.

Further, the second solder strip 112 includes a second solder layer, a second reflective layer and a second metal layer, the second metal layer is used to connect the second solder layer and the second reflective layer, the second solder layer is used to be soldered on the electrode, and the soldering width of the second solder layer soldered to the electrode is greater than the soldering width of the first solder layer 1111 soldered to the electrode, the second reflective layer is used to reflect sunlight onto the cell piece 2, and the second metal layer is capable of conducting electricity so as to conduct the electric energy converted from solar energy to the electric equipment through the second metal layer. The second metal layer is made of a material with good electrical conductivity, such as copper, silver, gold and alloys thereof, and the second reflection layer and the second welding layer are made of a material with good welding performance and good light reflection performance, such as tin, silver, lead, bismuth and alloys thereof. The materials of the first solder strip 111 and the second solder strip 112 may be different or the same, the specific material needs to be determined according to the actual working condition, and the specific materials of the first solder strip 111 and the second solder strip 112 may not be limited.

Specifically, in this embodiment, the second metal layer is disposed in parallel between the second solder layer and the second reflective layer which are parallel to each other, so that the cross-sectional shape of the second solder strip 112 is square or flat.

In other embodiments, an included angle may be formed between the second reflective layer and the second solder layer, and the second solder layer and the second reflective layer are respectively disposed on the bottom end surface and the non-bottom end surface of the second metal layer, so that the cross-sectional shape of the second solder strip 112 may form a circle, a semicircle, a triangle, a trapezoid, an ellipse, or other irregular figures, so that both the sunlight obliquely irradiating the second solder strip 112 and the sunlight perpendicularly irradiating the second solder strip 112 can be reflected onto the cell slice 2 through the second reflective layer, so that the cell slice 2 can receive more sunlight, and further the collection efficiency of the cell slice 2 on solar energy is higher.

It should be noted that in the photovoltaic module in this embodiment, since the included angle between the first reflective layer 1112 and the first solder layer 1111 of the first solder strip 111 is limited, and the solder width of the second solder strip 112 soldered to the electrode is the same as the width of the electrode, the photovoltaic module can achieve the function of simultaneously improving both the solar energy collection efficiency and the solar energy utilization efficiency; as for the welding width of the first welding strip 111 to the electrode, it is only necessary to ensure that it is not larger than the width of the electrode, and the formation structure between the second reflection layer and the second welding layer of the second welding strip 112 need not be specifically defined.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims (10)

1. The photovoltaic module is characterized by comprising a plurality of battery pieces (2) and photovoltaic welding strips, wherein electrodes are arranged on the battery pieces (2), and the photovoltaic welding strips comprise:

a first connection segment (11) for welding to the electrode on a first surface of one of two adjacent battery chips (2), the first connection segment (11) including a plurality of first and second welding strips (111, 112) disposed spaced apart from each other, the first welding strip (111) including a first welding layer (1111) and a first reflection layer (1112) disposed opposite to the first welding layer (1111), an included angle being formed between the first reflection layer (1112) and the first welding layer (1111), a welding width of the second welding strip (112) to the electrode being greater than a welding width of the first welding layer (1111) to the electrode;

a second connection section (12) extending toward the first connection section (11), the second connection section (12) being for welding to the electrode of the second surface of the other of the adjacent two of the battery pieces (2).

2. The photovoltaic module according to claim 1, characterized in that said second surface is arranged opposite to said first surface, said second connection section (12) comprising a plurality of said first solder strips (111) and said second solder strips (112) arranged at a distance from each other.

3. The photovoltaic module of claim 1, wherein a width of the second solder ribbon (112) soldered to the electrode is equal to or less than a width of the electrode.

4. The photovoltaic module of claim 1, wherein the photovoltaic solder ribbon further comprises:

the transition section (13) is connected between the first connecting section (11) and the second connecting section (12), the transition section (13) is suspended between two adjacent battery pieces (2), and the transition section (13), the first connecting section (11) and the second connecting section (12) are made of different materials.

5. The photovoltaic module according to claim 1, characterized in that the first solder ribbon (111) has a cross-sectional shape of a circle, a triangle, a semicircle or a trapezoid.

6. The photovoltaic module of claim 1, wherein the first solder ribbon (111) further comprises a first metal layer (1113), the first solder layer (1111) and the first reflective layer (1112) being disposed on a bottom end surface and a non-bottom end surface of the first metal layer (1113), respectively.

7. The photovoltaic module according to claim 1, wherein the second solder ribbon (112) comprises a second solder layer, a second reflective layer and a second metal layer, the second metal layer is used for connecting the second solder layer and the second reflective layer, the second solder layer is soldered to the electrode, the solder width of the second solder layer soldered to the electrode is larger than that of the first solder layer (1111) soldered to the electrode, and the first solder ribbon (111) and the second solder ribbon (112) are made of different materials.

8. The photovoltaic module of claim 7 wherein the second metal layer is disposed in parallel between the second solder layer and the second reflective layer that are parallel to each other.

9. The photovoltaic module of claim 7, wherein the second reflective layer and the second solder layer form an included angle therebetween, and the second solder layer and the second reflective layer are disposed on a bottom end surface and a non-bottom end surface of the second metal layer, respectively.

10. The photovoltaic module according to claim 4, characterized in that the number of the first connecting section (11), the second connecting section (12) and the transition section (13) is provided in plurality.

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