CN208240703U - Photovoltaic module - Google Patents

Abstract

The utility model provides a kind of photovoltaic module, including several parallel arrangeds and spaced battery strings, the battery strings include n cell piece and adjacent two cell piece is connected by welding, it is characterized by: the battery strings have a first end and a second end in their extension direction, the first end is equipped with first end welding, the second end is equipped with the second end welding, the length that the first end welding extends beyond cell piece edge is the first preset length a, the length that the second end welding extends beyond cell piece edge is the second preset length b, the first end welding with the first busbar for being connected with terminal box to interconnect, defining the terminal box to be located at size of the part of side of first busbar equipped with cell piece on battery strings extending direction is c, wherein c≤a and a > b.The utility model solves terminal box to the occlusion issue of back side illuminaton light, promotes the efficiency of two-sided photovoltaic module.

Description

Photovoltaic modules

technical field

The utility model relates to the field of photovoltaic power generation, in particular to a photovoltaic module.

Background technique

Double-sided photovoltaic modules are favored by the industry because both sides can receive light and generate electricity. In the existing photovoltaic modules, the junction box is generally fixed on the surface of the back plate of the module and located in the area where the photovoltaic modules are arranged with cells, so that the junction box has a certain effect on the light irradiated from the back of the module to the surface of the cells. Shading, which in turn affects the efficiency of double-sided photovoltaic modules.

Utility model content

The purpose of the utility model is to provide a photovoltaic module to improve the efficiency of the double-sided photovoltaic module.

For realizing above-mentioned utility model object, the technical scheme that the utility model embodiment takes is as follows:

A photovoltaic module, including several battery strings arranged in parallel and arranged at intervals, the battery strings include n battery slices and two adjacent battery slices are connected by welding strips, characterized in that: the battery strings have A first end and a second end, the first end is provided with a first end ribbon, the second end is provided with a second end ribbon, and the first end ribbon extends beyond the edge of the cell sheet The length is a first preset length a, and the length of the second end welding strip extending beyond the edge of the battery sheet is a second preset length b, and the first end welding strip is used to connect with the first junction box connected The bus bars are interconnected, and the dimension of the junction box located on the side of the first bus bar where the battery slices are provided is defined as c in the extending direction of the battery string, where c≦a and a>b.

As a further improvement of the utility model, 2≤a/b≤5.

As a further improvement of the utility model, 20mm<a<30mm, 6mm<b<10mm.

As a further improvement of the utility model, the photovoltaic module includes several first-type battery strings and second-type battery strings arranged in parallel and arranged at intervals, and the end welding strips of the positive terminals of the first-type battery strings extend beyond the battery sheets The length of the edge is a, the length of the end welding strip of the negative end of the first type of battery string extending beyond the edge of the battery sheet is b, and the length of the end welding strip of the positive end of the second type of battery string extending beyond the edge of the battery sheet The length is b, the length of the welding strip at the end of the negative terminal of the second type of battery string extends beyond the edge of the battery sheet is a, the positive terminal of the first type of battery string and the negative terminal of the second type of battery string are at same end.

As a further improvement of the utility model, the back of the photovoltaic module includes a strip-shaped first area extending along the battery string arrangement direction, the first area is located at the first end of the battery string, and the junction box bonded to the first area.

The beneficial effects of the embodiment of the utility model include: by manufacturing the first type of battery string and the second type of battery string with different lengths of the reserved ribbons at the head and tail, so as to realize the placement of the junction box in the area where the photovoltaic modules are arranged with battery sheets In addition, it solves the problem of the junction box blocking the backside light and improves the efficiency of the double-sided photovoltaic module.

Description of drawings

Fig. 1 is a partial structural schematic diagram of the utility model photovoltaic module;

Fig. 2 is a schematic diagram when the photovoltaic module shown in Fig. 1 is connected to a junction box;

Fig. 3 is a schematic diagram of the first type of battery string in the photovoltaic module of the present invention;

Fig. 4 is a schematic diagram of the second type of battery string in the photovoltaic module of the present invention;

Fig. 5 is the enlarged schematic diagram of place C in Fig. 2;

Fig. 6 is an enlarged schematic view at D in Fig. 2;

Fig. 7 is the enlarged schematic diagram of place E in Fig. 2;

Fig. 8 is a schematic structural view of another embodiment of the photovoltaic module of the present invention;

Fig. 9 is an enlarged schematic view at F in Fig. 8;

Fig. 10 is a schematic diagram of the first embodiment of the manufacturing method of the battery string in the photovoltaic module of the present invention;

Fig. 11 is an enlarged schematic view at G in Fig. 10;

Fig. 12 is a schematic diagram of the second embodiment of the manufacturing method of the battery string in the photovoltaic module of the present invention.

Detailed ways

The utility model will be described in detail below in conjunction with the embodiments shown in the accompanying drawings. However, this embodiment does not limit the present utility model, and any structural, method, or functional changes made by those skilled in the art according to this embodiment are included in the protection scope of the present utility model.

Please refer to Figures 1 to 7, the utility model provides a photovoltaic module 100, which includes a number of battery strings 10 arranged in parallel and arranged at intervals, each of the battery strings 10 includes n battery slices 11, and Two adjacent cell sheets 11 are connected by a welding ribbon 12 . In the embodiment shown in the present invention, each battery string 10 has 10 battery slices, and in other embodiments, it can also be 12 or other numbers.

The battery string 10 has a first end and a second end in its extending direction, the first end is provided with a first end welding strip 121, and the second end is provided with a second end welding strip 122, so The length of the first end welding strip 121 extending beyond the edge of the battery sheet 11 is a first predetermined length a, and the length of the second end welding strip 122 extending beyond the edge of the battery sheet 11 is a second predetermined length b, so The first end solder strip 121 is used to interconnect with the first bus bar 13 connected to the junction box 14 .

Please refer to Fig. 1 to Fig. 2 and Fig. 7, in this embodiment, the junction box 14 is arranged outside the area where the photovoltaic module 100 is arranged with the cells 11, specifically, the junction box 14 of the photovoltaic module 100 The back side includes a strip-shaped first area 15 extending along the direction in which the battery strings 10 are arranged, the first area 15 is located at the first end of the battery string 10, and the junction box 14 is bonded to the first area 15 on.

In this embodiment, the side of the first bus bar 13 close to the battery string 10 is its inner side, and the side away from the battery string 10 is its outer side, defining that the junction box 14 is located at the first bus bar The dimension of the part inside 13 (that is, the side where the battery sheet is provided) in the extending direction of the battery string 10 is c, where c≦a and a>b. Further, the ratio of the first preset length a to the second preset length b is a/b, wherein a/b is greater than or equal to 2 and less than or equal to 5, that is, the range of the ratio is 2≤a/b≤5.

In a preferred embodiment of the present invention, the value ranges of the first preset length a and the second preset length b are respectively: 20mm<a<30mm, 6mm<b<10mm.

The photovoltaic module 100 includes a plurality of first-type battery strings A and second-type battery strings B arranged in parallel and arranged at intervals, and the first-type battery strings A and second-type battery strings B are alternately arranged. The positive and negative directions of the first type of battery string A and the second type of battery string B are oppositely arranged, and the first type of battery string A and the second type of battery string B are connected in series with each other.

In this embodiment, the welding strip at the positive end of the first type of battery string A extends beyond the edge of the battery sheet 11 by a length a, and the welding strip at the negative end of the first type of battery string A extends beyond the battery The length of the edge of the sheet 11 is b, the length of the welding strip at the end of the positive end of the battery string B of the second type extends beyond the edge of the battery sheet 11 is b, and the welding strip at the negative end of the battery string B of the second type extends The length beyond the edge of the battery sheet 11 is a, and the positive end of the first type of battery string A is at the same end as the negative end of the second type of battery string B.

Please refer to Figure 8 and Figure 9, which is another embodiment of the photovoltaic module of the present invention, which has the same basic structure as the previous embodiment, the difference is that in this embodiment, the junction box 24 of the photovoltaic module Located in the middle of the photovoltaic module, at this time, the first bus bar 23 is located in the middle of the upper and lower battery strings and connects the upper and lower battery strings, that is, the two sides of the first bus bar 23 Both sides of the junction box 24 are provided with battery slices, and the dimensions of the parts of the junction box 24 located on both sides of the first bus bar 23 in the extending direction of the battery string are c.

The manufacturing method of the battery string in the photovoltaic module of the present invention comprises:

According to the preset distance d between adjacent battery slices 11 in the battery string 10, grab the battery slices 11 and arrange them with the distance d, and connect two adjacent battery slices 11 through welding ribbons 12, so as to obtain A battery string of n battery slices 11, the two ends of the battery string 10 in the extending direction are respectively provided with end welding strips;

Respectively cut the end welding strips at both ends of the battery string 10, so that the lengths of the end welding strips at both ends of the battery string 10 extending beyond the edge of the battery sheet 11 are respectively a first preset length a and a second preset length a. Let the length b; the end welding strip with the length a is used to interconnect with the first bus bar 13 connected with the junction box, and define the part of the junction box located inside the first bus bar 13 in the extending direction of the battery string 10 The dimension on is c, where c≤a and a>b.

Among them, 2≤a/b≤5, 20mm<a<30mm, 6mm<b<10mm.

The battery string 10 includes a first type of battery string A and a second type of battery string B, the length of the welding strip at the positive end of the first type of battery string A extending beyond the edge of the battery sheet 11 is a, and the length of the first type of battery string A is a. The length of the end welding strip of the negative terminal of one type of battery string A extending beyond the edge of the battery sheet 11 is b, and the length of the end welding strip of the positive terminal of the second type of battery string B extending beyond the edge of the battery sheet 11 is b, so The length a of the end welding strip at the negative end of the battery string B of the second type extending beyond the edge of the battery sheet 11 is a.

Further, please refer to FIG. 10 and FIG. 11 , in the first embodiment of the present utility model, the grasping battery slices 11 are arranged at the distance d, and the two adjacent battery slices are connected by welding strips 12 respectively. 11 Making connections includes:

According to the preset spacing d between adjacent battery slices 11 in the battery string 10 and the string spacing L between adjacent battery strings, grab the battery slices and arrange them with the spacing d and the string spacing L, and pass the welding strips 12 respectively Connect two adjacent battery sheets 11 to form a string sequence including several battery strings 10 connected end to end, where L=2a;

The cutting of the solder strips at both ends of the battery string 10 respectively includes:

Circularly execute the preset cutting action combination to cut the connecting ribbon 123 between two adjacent battery strings 10 in the string sequence to obtain the first type of battery string A and the second type of battery string B; The connecting soldering strip 123 is the portion of the terminal soldering strip 12 located between two adjacent battery strings 10, and the connecting soldering strip has a head and a tail that are arranged oppositely, and the head is connected to the adjacent two battery strings 10. One of them is connected, and the tail is connected with the other of the two adjacent battery strings 10 .

The combination of cutting actions includes:

Cutting at the midpoint of the connecting ribbon 123 between the kth battery string 10 and the k+1th battery string 10;

Cutting the connecting ribbon 123 between the k+1th battery string 10 and the k+2th battery string 10 at a distance from the head b of the connecting ribbon;

Cutting is performed on the connecting ribbon 123 between the k+1th battery string 10 and the k+2th battery string 10 at a distance from the tail b of the connecting ribbon.

Please refer to Fig. 12, which is the second embodiment of the manufacturing method of the battery string 10 in the photovoltaic module 100 of the present invention. The band 12 respectively connects two adjacent battery pieces 11 including:

According to the preset spacing d between adjacent battery slices 11 in the battery string 10 and the string spacing L1 and L2 between adjacent battery strings 10, grab the battery slices 11 and arrange them with the spacing d and the string spacing L1 and L2 , and respectively connect two adjacent cell sheets 11 by welding ribbon 12 to form a string sequence including the first type battery string A and the second type battery string B; wherein, the first type battery string A and the adjacent The string spacing between the previous battery string B of the second type is L1, and the string spacing between the battery string A of the first type and the next adjacent battery string B of the second type is L2, where L1=2a, L2= 2b;

The cutting of the solder strips at both ends of the battery string 10 respectively includes:

Cutting is performed at the midpoint of the connecting ribbon 123 between two adjacent battery strings 10 in the string sequence.

The utility model realizes the installation of the junction box outside the area where the photovoltaic modules are arranged with battery slices, and solves the problem of wiring The problem of blocking the backside light by the box improves the efficiency of double-sided photovoltaic modules.

It should be understood that although this description is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the description is only for clarity, and those skilled in the art should take the description as a whole, and each The technical solutions in the embodiments can also be properly combined to form other embodiments that can be understood by those skilled in the art.

The series of detailed descriptions listed above are only specific descriptions for the feasible implementation modes of the present utility model, and they are not used to limit the protection scope of the present utility model. Embodiments or modifications should be included within the protection scope of the present utility model.

Claims (5)

1. A photovoltaic module, comprising several battery strings arranged in parallel and arranged at intervals, the battery strings include n battery pieces and two adjacent battery pieces are connected by welding strips, it is characterized in that: the battery strings are in the direction of their extension has a first end and a second end, the first end is provided with a first end ribbon, the second end is provided with a second end ribbon, and the first end ribbon extends beyond the battery sheet The length of the edge is a first predetermined length a, and the length of the second end welding strip extending beyond the edge of the battery sheet is a second predetermined length b, and the first end welding strip is used to connect with the junction box The first bus bars are interconnected, and the dimension of the junction box located on the side of the first bus bar where the battery slices are provided is defined as c in the extending direction of the battery string, where c≤a and a>b. 2. The photovoltaic module according to claim 1, characterized in that: 2≤a/b≤5. 3. The photovoltaic module according to claim 2, characterized in that: 20mm<a<30mm, 6mm<b<10mm. 4. The photovoltaic module according to claim 1, characterized in that: the photovoltaic module includes several first-type battery strings and second-type battery strings arranged in parallel and arranged at intervals, and the positive terminals of the first-type battery strings The length of the end welding strip extending beyond the edge of the battery sheet is a, the length of the end welding strip extending beyond the edge of the battery sheet of the negative terminal of the first type of battery string is b, and the length of the end of the positive terminal of the second type of battery string The length of the welding strip extending beyond the edge of the battery sheet is b, the length of the welding strip at the end of the negative end of the second type of battery string extending beyond the edge of the battery sheet is a, and the length of the positive end of the first type of battery string is connected to the first type of battery string. The negative ends of the second battery strings are at the same end. 5. The photovoltaic module according to claim 1, characterized in that: the back side of the photovoltaic module includes a long strip-shaped first region extending along the cell string arrangement direction, the first region is located on the cell string At the first end, the junction box is bonded to the first area.