CN216015374U - Battery string connecting piece and photovoltaic module - Google Patents

Abstract

The utility model relates to the technical field of photovoltaic power generation, and discloses a battery string connecting piece and a photovoltaic module. The battery string connecting piece comprises a conductive body and an insulating layer, wherein the conductive body is strip-shaped, the insulating layer is arranged on two side edges of the conductive body respectively in the width direction of the conductive body, and the two sides of the insulating layer extend to the top surface and the bottom surface of the conductive body respectively. The manufacturing process is simple, and partial insulation is realized. The photovoltaic module comprises a plurality of battery strings and battery string connecting pieces, wherein the battery strings are connected by the battery string connecting pieces. The battery string connecting piece can avoid causing electric arcs or forming an internal loop, so that the safety of the photovoltaic module is higher, and the design of the distance between the battery string connecting piece and the battery string can be reduced due to the edge insulation of the battery string connecting piece, and even the battery string connecting piece and the battery string can be attached together under the extreme condition, so that the size of the module can be reduced.

Description

Battery string connecting piece and photovoltaic module

Technical Field

The utility model relates to the technical field of photovoltaic power generation, in particular to a battery string connecting piece and a photovoltaic module.

Background

The photovoltaic module is used as a potential power generation mode, an electrical structure of the photovoltaic module mainly comprises photovoltaic power generation cells, a connecting structure and a bypass pipe, wherein when the number of cell strings of the photovoltaic module is odd, a long strip-shaped interconnection material (usually a tinned copper strip) is required to replace one cell string (required to be connected with a parallel object at the head), and the replacement material is a jumper wire or a flying wire. The bus bars and the jumper wires can be collectively referred to as a bus structure of the photovoltaic module, and compared with the solder strip, the value of the flowing current is multiple times that of the solder strip. The long-distance jumper increases the process difficulty, and because the jumper is easy to bend and deform, the fixation by using an adhesive tape cannot be completely improved, so that the jumper is too close to a power generation battery to cause electric arcs, and even the jumper is overlapped with the battery to form an internal loop; also, there is a risk of fire due to problems such as arcing or formation of internal circuits between the bus bars and the battery cells.

SUMMERY OF THE UTILITY MODEL

Based on the above, the utility model aims to provide a battery string connecting piece and a photovoltaic module, which are simple in manufacturing process, capable of realizing partial insulation, avoiding electric arcs or forming internal loops, and high in safety of the photovoltaic module.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a battery string connector comprising:

the conductive body is strip-shaped;

the insulating layer is arranged on two side edges of the conductive body in the width direction of the conductive body respectively, and two sides of the insulating layer extend to the top surface and the bottom surface of the conductive body respectively.

As a preferable scheme of the battery string connecting member, a portion of the conductive body, on which the insulating layer is disposed, is a first conductive body, another portion of the conductive body, on which the insulating layer is not disposed, is a second conductive body, and a thickness of the first conductive body is smaller than a thickness of the second conductive body.

As a preferable mode of the battery string connecting member, a difference between a sum of a thickness of the first conductive body and a thickness of the insulating layer provided thereon and a thickness of the second conductive body ranges from 0 to 1 mm.

As a preferable scheme of the battery string connecting piece, the top surface and/or the bottom surface of the second conductive body is/are provided with reflective grains.

As a preferable scheme of the battery string connecting piece, the insulating layer is adhered or laid on the conductive body.

As a preferable scheme of the battery string connecting piece, the insulating layer comprises an anti-aging layer, a temperature-resistant layer and a wear-resistant layer which are arranged from inside to outside in sequence.

As a preferable aspect of the battery string connecting member, the insulating layer further includes:

and the upper color layer is arranged on the outer side of the wear-resistant layer.

A photovoltaic module comprises a plurality of battery strings and the battery string connecting piece in any technical scheme, wherein the battery strings are connected by the battery string connecting pieces.

As a preferable scheme of the photovoltaic module, when the number of the plurality of cell strings is even, the cell string connecting member includes bus bars, the plurality of bus bars are distributed at intervals in a first direction, two adjacent bus bars are distributed in a staggered manner in a second direction, and one cell string is connected between two adjacent bus bars.

As a preferable scheme of the photovoltaic module, when the number of the plurality of cell strings is odd, the cell string connecting member includes bus bars and jumper wires, the plurality of bus bars are distributed at intervals in a first direction, two adjacent bus bars are distributed in a staggered manner in a second direction, two bus bars of the plurality of bus bars are connected in series through one jumper wire, and one cell string is connected between two adjacent bus bars in the remaining plurality of bus bars.

The utility model has the beneficial effects that:

the utility model provides a battery string connecting piece, which comprises a strip-shaped conductive body and insulating layers, wherein the insulating layers are respectively arranged on two sides of the conductive body in the width direction, and the two sides of each insulating layer respectively extend to the top surface and the bottom surface of the conductive body, so that the two sides of the conductive body are insulated, when the battery string connecting piece is used for connecting a battery string, the two sides of the battery string connecting piece cannot cause electric arcs with adjacent electric conductors or cause short circuits due to position deviation and lap joint of the adjacent electric conductors, and the use safety is improved, and the manufacturing process of the battery string connecting piece is simple.

The utility model also provides a photovoltaic module which comprises a plurality of battery strings and a plurality of battery string connecting pieces, so that the safety of an internal circuit of the photovoltaic module is effectively improved, and simultaneously, because the two sides of each battery string connecting piece are insulated, the gap between each battery string connecting piece and each battery string can be reduced, even the battery string connecting pieces and the battery strings can be attached together, so that the size of the photovoltaic module is effectively reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a schematic diagram of an insulating layer structure of a battery string connector according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a battery string connector provided by an embodiment of the present invention;

fig. 3 is a schematic circuit diagram of a photovoltaic module according to an embodiment of the present invention when the number of cell strings is even;

FIG. 4 is a schematic structural diagram of a photovoltaic module provided by an embodiment of the utility model;

fig. 5 is a schematic circuit diagram of a photovoltaic module according to an embodiment of the present invention when the number of cell strings is odd;

fig. 6 is a schematic structural diagram of connection of jumper wires and bus bars to a battery string according to an embodiment of the present invention.

In the figure:

1. a conductive body; 11. a first conductive body; 12. a second conductive body;

2. an insulating layer; 21. an anti-aging layer; 22. a temperature resistant layer; 23. a wear layer; 24. coating a color layer;

3. reflecting lines; 4. a battery string; 5. a bus bar; 6. a jumper wire; 7. a laminate; 8. a bypass tube.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 and fig. 2, the present embodiment provides a battery string connector, which includes a strip-shaped conductive body 1 and an insulating layer 2, wherein the insulating layer 2 is respectively disposed on two sides of the conductive body 1 in a width direction of the conductive body 1, and two sides of the insulating layer 2 respectively extend to a top surface and a bottom surface of the conductive body 1. Under the structure, the two sides of the conductive body 1 are insulated, when the battery string connecting piece is used for connecting the battery string 4, the two sides of the battery string connecting piece cannot cause electric arcs with adjacent electric conductors or cause short circuit and other problems due to overlapping of position deviation and the adjacent electric conductors, and the use safety is improved. Compared with the integral insulation in the prior art, the battery string connecting piece is simple in manufacturing process and realizes partial insulation, the battery string connecting piece is used as an electric connection structure, partial areas (usually head and tail) in the length direction need to be welded and interconnected with other conductive materials, insulation needs to be avoided for the connection positions after the bus structure is integrally insulated, the technical control difficulty is high, the battery string connecting piece provided by the embodiment is only partially insulated, and the uninsulated part can be directly welded. The integral insulation needs an annular closed structure, and the film covering is difficult to realize; because the battery string connecting piece is long and easy to bend, the process difficulty of the mode of using the insulating sleeve is high; in addition, the mode of the coating is adopted, the insulation effect and the ageing resistance are often poor, and after the battery string connecting piece is bent for multiple times, cracks are easily formed on the surface of the coating. The battery string connecting piece provided by the embodiment realizes the insulating function through insulation of the two side parts of the conductive body 1, and meanwhile, the manufacturing process is simple, and the cost can be effectively saved.

Optionally, the insulating layer 2 of the battery string connecting piece provided by this embodiment is disposed on the conductive body 1 by coating, pasting, or skin processing.

Preferably, as shown in fig. 1, the insulating layer 2 includes an age layer 21, a temperature-resistant layer 22, and a wear-resistant layer 23, which are disposed once from the inside to the outside. Illustratively, the added insulating layer 2 is added by adding an injection agent, so that the insulating layer has the properties of ultraviolet resistance, aging resistance, high temperature resistance and wear resistance, and the service life and the use safety are improved. More preferably, an upper color layer 24 is further disposed outside the wear-resistant layer 23, so that the appearance color of the insulating layer 2 can be adjusted according to the color requirement of the surrounding application environment, for example, the color of the insulating layer is consistent with the color of the interconnection, the back panel, the frame or the battery, and the like, thereby maintaining the consistency of the appearance and improving the aesthetic property.

Further, as shown in fig. 2, a portion of the conductive body 1 on which the insulating layer 2 is disposed is a first conductive body 11, another portion of the conductive body 1 on which the insulating layer 2 is not disposed is a second conductive body 12, and a thickness of the first conductive body 11 is smaller than a thickness of the second conductive body 12. Under above-mentioned structure, avoided conductive body 1 too big in thickness after setting up insulating layer 2, influence in-service use effect and practicality. Optionally, the sum of the thickness of the first conductive body 11 and the thickness of the insulating layer 2 provided thereon differs from the thickness of the second conductive body 12 by a value in the range of 0-1 mm. Preferably, the sum of the thickness of the first conductive body 11 and the thickness of the insulating layer 2 provided thereon is equal to the thickness of the second conductive body 12. I.e. so that the top and bottom surfaces of the conductive body 1 provided with the insulating layer 2 remain flat and constant in thickness. When the battery string connecting member connects the battery string 4 and is disposed inside the laminate member 7, since the height inside the laminate member 7 is limited, the use of the battery string connecting member avoids increasing the thickness of the entire laminate member 7, and avoids the presence of the handling protrusion and the sustaining stress in the laminate member 7, ensuring the practicality of the battery string connecting member.

Preferably, the top surface and/or the bottom surface of the second conductive body 12 is provided with the reflective grains 3. Set up reflection of light line 3 on the electrically conductive body 12 of second that is not provided with insulating layer 2 and be favorable to the dispersion reflection of light effect, avoid local radiant light to lead to the fact light pollution too intensely, simultaneously through the light energy of reflection, can be absorbed by the power generation material.

As shown in fig. 3 to 6, the present embodiment also provides a photovoltaic module, which includes a laminate 7, a plurality of cell strings 4, and the cell string connectors described above, wherein the cell strings 4 are connected by the cell string 4 connectors. Illustratively, the cell string connector replaces a jumper 6 and/or a bus bar 5 in the photovoltaic module, so that the safety of an internal circuit of the photovoltaic module can be effectively improved; meanwhile, because two side edges of the battery string connecting piece are insulated, the gap between the battery strings 4 can be reduced, and the size of the photovoltaic module is reduced.

Specifically, as shown in fig. 3, when the number of the battery strings 4 is an even number, the battery string connecting member includes bus bars 5, a plurality of the bus bars 5 are spaced apart in the X direction, two adjacent bus bars 5 are staggered in the Y direction, one battery string 4 is connected between two adjacent bus bars 5, and the X direction is perpendicular to the Y direction. Namely, both ends of the battery string 4 are connected with the bus bars, the bus bars at both ends are led out to the outside of the photovoltaic module, a junction box is externally installed, a position for welding is arranged inside the junction box, the bus bars and the junction box are welded to form a whole, and current is led out through wires on the junction box. In order to improve the heating condition of the photovoltaic power generation cell of the photovoltaic module under the shading condition, a bypass pipe 8 is connected in series between every two adjacent bus bars 5 at one end, and when the cell piece heats, the bypass pipes 8 are communicated to form a passage, so that the overheating of the cell piece is avoided, and the potential safety hazard is caused. The insulating layers 2 are arranged on two sides of the bus bars 5 connected with the battery strings 4, so that electric arcs or lap joints between two adjacent bus bars 5 and battery pieces can be avoided to form short circuits, and gaps between the bus bars 5 and the battery strings 4 are reduced; meanwhile, the middle part of the bus bar 5 is still a conductor, and can be smoothly connected with the battery string 4.

As shown in fig. 4 and 5, when the number of the plurality of battery strings 4 is an odd number, the battery string connecting member includes bus bars 5 and jumper wires 6, the plurality of bus bars 5 are spaced apart in the X direction, two adjacent bus bars 5 are staggered in the Y direction, two bus bars 5 of the plurality of bus bars 5 are connected in series by one jumper wire 6, one battery string is connected between two adjacent bus bars 5 of the remaining plurality of bus bars 5, and the X direction is perpendicular to the Y direction. Preferably, a bypass pipe 8 is connected in series between every two adjacent bus bars 5 at one end, and when the battery piece is heated, the bypass pipes 8 are communicated to form a passage, so that the overheating of the battery piece is avoided, and the potential safety hazard is caused. Alternatively, the jumper 6 may be located in the middle or on one side of the electrical part. The insulating layers 2 are arranged on the two sides of the jumper 6, so that the insulating layers 2 are formed between the jumper 6 and the adjacent battery strings 4, and even if the jumper 6 deviates a certain position, electric arcs or internal short circuits cannot be caused, so that the safety risk of a product is reduced; meanwhile, the gap between the jumper 6 and the battery string 4 can be reduced, and the gap between the bus bar 5 and the battery string 4 can also be reduced, reducing the size of the laminated member 7. And as shown in fig. 6, the insulating layers 2 are arranged on two sides of the bus bar 5 connected with the battery string 4, one end of the jumper 6 is connected with one end of the bus bar 5, and two ends of the jumper 6 and two ends of the bus bar 5 are both conductive parts, so that the connection is convenient.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (10)

1. A battery string connector, comprising:

a conductive body (1) in the shape of a strip;

the insulating layer (2) is arranged on two side edges of the conductive body (1) in the width direction of the conductive body (1) and extends to the top surface and the bottom surface of the conductive body (1) respectively, and the insulating layer (2) is arranged on two side edges of the conductive body (1).

2. The battery string connector according to claim 1, wherein a portion of the conductive body (1) on which the insulating layer (2) is disposed is a first conductive body (11), another portion of the conductive body (1) on which the insulating layer (2) is not disposed is a second conductive body (12), and a thickness of the first conductive body (11) is smaller than a thickness of the second conductive body (12).

3. The battery string connection according to claim 2, wherein the sum of the thickness of the first conductive body (11) and the thickness of the insulating layer (2) provided thereon differs from the thickness of the second conductive body (12) by a value in the range of 0-1 mm.

4. The battery string connector according to claim 2, wherein the top and/or bottom surface of the second conductive body (12) is provided with a reflective texture (3).

5. The battery string connection according to claim 1, wherein the insulating layer (2) is glued or applied to the conductive body (1).

6. The battery string connector according to claim 1, wherein the insulating layer (2) comprises an anti-aging layer (21), a temperature-resistant layer (22), and a wear-resistant layer (23) which are provided in this order from the inside to the outside.

7. The battery string connector according to claim 6, wherein the insulating layer (2) further comprises:

and the upper color layer (24) is arranged on the outer side of the wear-resistant layer (23).

8. A photovoltaic module comprising a plurality of cell strings (4) and a plurality of cell string connectors according to any of claims 1-7, wherein a plurality of said cell strings (4) are connected by a plurality of said cell string connectors.

9. The photovoltaic module according to claim 8, wherein when the number of the plurality of cell strings (4) is even, the cell string connecting member includes bus bars (5), a plurality of the bus bars (5) are distributed at intervals in the X direction, two adjacent bus bars (5) are distributed alternately in the Y direction, and one cell string (4) is connected between two adjacent bus bars (5).

10. The pv module according to claim 8, wherein when the number of the cell strings (4) is odd, the cell string connector comprises bus bars (5) and jumper wires (6), a plurality of the bus bars (5) are spaced apart in the X direction, two adjacent bus bars (5) are staggered in the Y direction, two bus bars (5) of the plurality of the bus bars (5) are connected in series by one jumper wire (6), and one cell string (4) is connected between two adjacent bus bars (5) in the remaining plurality of the bus bars (5).

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