CN205406544U - Solar module's lead -out wire structure - Google Patents

Abstract

The utility model relates to a lead-out wire structure of a solar battery assembly, which has a solar battery string and a back plate; the solar battery string is arranged on one side of the back plate; the diagonal positions of the back plate are respectively provided with first threading holes and the second threading hole; the positive and negative lead-out wires of the solar battery string pass through the first threading hole and the second threading hole respectively. The utility model uses fewer busbars to lead out the current, and the position of the lead-out line can meet certain usage requirements.

Description

Lead-out wire structure of a solar cell module

technical field

The utility model relates to components of a solar cell assembly, in particular to a lead-out wire structure of a solar cell assembly.

Background technique

Solar photovoltaic modules are devices that directly convert light energy into electrical energy through the photoelectric effect or photochemical effect. As long as it is illuminated by light, it can output voltage and current instantly. According to the crystalline state, solar cells in solar photovoltaic modules can be divided into two categories: crystalline thin film type and amorphous thin film type, and the former is divided into single crystal form and polycrystalline form.

The crystalline silicon cells in traditional solar cells are arranged in a matrix and connected in series through interconnecting bars. There is a certain waste of area in this setting method, and it is impossible to maximize the use of light energy in the effective illumination area. At the same time, a large number of interconnection bars and busbars are also prone to short-circuit phenomenon, so it is often necessary to isolate the interconnection bars and busbars, which directly leads to an increase in production costs.

At the same time, in the existing solar photovoltaic modules, the confluence belt will occupy a certain effective lighting area and affect the overall appearance.

The lead wires in solar photovoltaic modules are generally lead out in a centralized manner. However, under some specific conditions of use, the concentration of lead wires will cause inconvenient installation, and the lead wires are easy to bend and break during long-term use.

Utility model content

The purpose of the utility model is to provide a lead-out wire structure of a solar battery module that reduces interconnection bars and bus bars and can meet certain usage requirements.

The technical solution for realizing the purpose of the utility model is: the utility model has a solar cell string and a backboard; the solar cell string is arranged on one side of the backboard; The second threading hole: the positive and negative lead-out wires of the solar battery string pass through the first threading hole and the second threading hole respectively.

The above-mentioned solar battery string includes a positive battery string and a negative battery string; the positive battery string includes at least one battery string; the negative battery string also includes at least one battery string; The silicon cell and the front side of the next crystalline silicon cell are stacked with the back part of the previous crystalline silicon cell to form an electrical connection.

The negative pole of the positive battery string is electrically connected to the positive pole of the negative battery string; the positive pole of the positive battery string is connected to the positive lead-out line, and the negative pole of the negative battery string is connected to the negative lead-out line.

The above-mentioned positive battery string includes at least two parallel battery strings; the negative battery string also includes at least two parallel battery strings; the positive electrodes of each battery string in the positive battery string are connected through positive lead wires, and the positive battery The negative poles of each cell string in the string are connected together through the first series connection busbar, so that the cell strings in the positive cell string are connected in parallel; one end of the positive lead-out line passes through the first threading hole on the back plate; the The negative poles of each battery string in the negative battery string are connected through negative lead-out wires, and the positive poles of each battery string in the negative battery string are connected together through a second series bus belt, so that the battery strings in the negative battery string are connected in parallel; One end of the negative lead-out wire passes through the second threading hole on the back plate.

The positive and negative poles of each of the battery strings are provided with interconnecting strips; the positive lead-out wires are connected to the interconnecting strips of the positive electrodes of each battery string in the positive battery string; The interconnection bar of the negative electrode of the cell string is connected; the negative lead-out line is connected with the interconnection bar of the negative electrode of each cell string in the negative battery string; the second series bus belt is connected with the interconnection bar of the positive electrode of each cell string in the negative cell .

The diagonal positions of the above-mentioned back are respectively provided with a first groove and a second groove. After the backboard is installed on the frame, the first groove and the frame form a first threading hole, and the second groove and the frame form a second hole. needle.

Silicone seals are provided at the first threading hole and the second threading hole after the positive electrode lead-out wire and the negative electrode lead-out wire respectively go from the first threading hole and the second threading hole.

The utility model has positive effects: (1) The utility model draws the positive lead-out wire and the negative lead-out wire from the diagonal of the backboard, which can effectively avoid circuit short circuit while meeting certain usage requirements;

(2) In the utility model, the crystalline silicon cells are electrically connected by contacts, which can save a large number of interconnecting bars and save costs;

(3) The stacking of crystalline silicon cells in the utility model can reduce the overall volume of the product;

(4) The utility model can realize the arrangement of more crystalline silicon cells in a unit area through the stacking of crystalline silicon cells, so that the unit area has a higher power generation efficiency;

(5) The utility model provides silica gel seals at the first threading hole and the second threading hole, which can not only prevent dust from entering, but also fix the positive and negative lead-out wires, reducing the wear of the positive and negative lead-out wires.

Description of drawings

In order to make the content of the utility model easier to understand clearly, the utility model will be further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of solar cell string in the utility model;

Fig. 3 is the enlarged view of place A in Fig. 2;

Fig. 4 is a structural schematic diagram of the utility model crystalline silicon cell stack;

FIG. 5 is a schematic structural view of the backboard of the present invention.

detailed description

See Fig. 1 to Fig. 5, the utility model has solar cell string and back plate 1; Said solar cell string is arranged on one side of back plate 1; second threading hole;

The solar battery string includes a positive battery string and a negative battery string; the positive battery string includes at least one battery string 4; the negative battery string also includes at least one battery string 4; the battery string 4 includes a plurality of The crystalline silicon cells 41 are arranged in a row, and the front side of the next crystalline silicon cell 41 is partially stacked with the back side of the previous crystalline silicon cell 41 to form an electrical connection.

The negative pole of the positive battery string is electrically connected to the positive pole of the negative battery string;

The positive battery string includes more than two battery strings 4 connected in parallel; the negative battery string also includes more than two parallel battery strings 4; the positive and negative electrodes of each battery string 4 are provided with interconnecting strips 7 The interconnection strips 7 of the positive poles of each battery string 4 in the positive battery string are connected through the positive lead-out line 2, and the interconnection strips 7 of the negative poles of each battery string 4 in the positive battery string are connected together through the first serial bus belt 5, Make the battery strings 4 in the positive battery strings connected in parallel; one end of the positive lead wire 2 passes through the first threading hole of the back plate 1; the interconnection bar 7 of the negative pole of each battery string 4 in the negative battery string passes through the negative pole The lead wires 3 are connected, and the interconnection strips 7 of the positive poles of the battery strings 4 in the negative battery strings are connected together through the second serial connection bus strip 6, so that the battery strings 4 in the negative battery strings are connected in parallel; the negative lead wires 3 One end passes through the second threading hole of the backboard 1 .

The positive lead-out wire 2 and the negative lead-out wire 3 are provided with silica gel seals at the first thread-through hole and the second thread-through hole after the first thread-through hole and the second thread-through hole respectively.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present utility model in detail. It should be understood that the above descriptions are only specific embodiments of the present utility model and are not intended to limit the present invention. For the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims (7)

1. A lead wire structure of a solar cell assembly, having a solar cell string and a back plate (1); it is characterized in that: the solar cell string is arranged on one side of the back plate (1); the back plate (1) A first threading hole and a second threading hole are respectively provided at the diagonal positions; the positive lead-out wire (2) and the negative lead-out wire (3) of the solar battery string pass through the first threading hole and the second threading hole respectively. 2. The lead wire structure of a solar cell assembly according to claim 1, wherein the solar cell string includes a positive battery string and a negative battery string; the positive battery string includes at least one cell string (4 ); the negative battery string also includes at least one battery string (4); the battery string (4) includes a plurality of arranged crystalline silicon battery slices (41) and the next crystalline silicon battery slice (41) The front side is partially stacked with the back side of the previous crystalline silicon cell (41) and electrically connected. 3. The lead wire structure of a solar cell module according to claim 1, characterized in that: the negative pole of the positive battery string is electrically connected to the positive pole of the negative battery string; the positive pole of the positive battery string is connected to the positive lead wire (2) connection, the negative pole of the negative pole battery string is connected with the negative pole lead wire (3). 4. The lead wire structure of a solar cell module according to claim 3, characterized in that: the positive battery string includes at least two battery slice strings (4) connected in parallel; the negative battery string also includes at least two battery strings (4) connected in parallel; the positive poles of each battery string (4) in the positive battery string are connected through the positive lead-out line (2), and the negative poles of each battery string (4) in the positive battery string are connected through the first battery string (4) The series bus strips (5) are connected together, so that the battery strings (4) in the positive battery strings are connected in parallel; one end of the positive lead wire (2) passes through the first threading hole of the back plate (1); The negative poles of each battery string (4) in the negative battery string are connected through the negative lead-out wire (3), and the positive poles of each battery string (4) in the negative battery string are connected together through the second serial bus belt (6), The battery strings (4) in the negative battery strings are connected in parallel; one end of the negative lead wire (3) passes through the second threading hole of the back plate (1). 5. The lead wire structure of a solar cell module according to claim 4, characterized in that: the positive and negative electrodes of each cell string (4) are provided with interconnecting strips (7); (2) Connect with the interconnection strips (7) of the positive poles of each battery string (4) in the positive battery string; the interconnection between the first serial connection bus strip (5) and the negative pole of each battery string (4) in the positive battery string Bar (7) is connected; the negative lead-out wire (3) is connected with the interconnection bar (7) of the negative pole of each cell string (4) in the negative battery string; the second serial connection bus strip (6) is connected with the negative battery string The interconnection strips (7) of the positive poles of each cell string (4) in the battery string are connected. 6. The lead wire structure of a solar cell module according to claim 5, characterized in that: the diagonal positions of the back plate (1) are respectively provided with a first groove (11) and a second groove ( 12), after the backboard (1) is installed on the frame body, the first groove (11) forms a first threading hole with the frame body, and the second groove (12) forms a second threading hole with the frame body. 7. The lead-out wire structure of a solar cell module according to claim 6, characterized in that: the positive lead-out wire (2) and the negative lead-out wire (3) pass through the first threading hole and the second threading hole respectively. Silicone seals are provided at the first threading hole and the second threading hole.