CN212136458U

CN212136458U - Low-cost back ALD passivation efficient solar cell

Info

Publication number: CN212136458U
Application number: CN202020827092.1U
Authority: CN
Inventors: 陈阳泉; 戴亮亮; 柯雨馨; 许奕川
Original assignee: Yangguang Zhongke Fujian Energy Co ltd
Current assignee: Yangguang Zhongke Fujian Energy Co ltd
Priority date: 2020-05-18
Filing date: 2020-05-18
Publication date: 2020-12-11
Anticipated expiration: 2030-05-18

Abstract

The utility model discloses a high-efficient solar cell of low-cost back ALD passivation, including solar cell body, solar cell body comprises frame, backplate, lower EVA glued membrane, battery piece, last EVA glued membrane and glass, the inside bottom of frame is provided with the backplate, the top of backplate has set gradually down EVA glued membrane, battery piece, has gone up EVA glued membrane and glass, and EVA glued membrane, battery piece, last EVA glued membrane and glass all are located the inside of frame down, the battery piece lower surface is provided with the alumina film. The utility model discloses in, the cell piece surface forms the alumina membrane that the one deck has good passivation effect for this high-efficient solar cell of low-cost back ALD passivation compares with traditional solar cell, has good passivation effect, reduces back of the body defect state density effectively, reduces back of the body complex, improves back internal reflection, has improved solar cell's conversion efficiency.

Description

Low-cost back ALD passivation efficient solar cell

Technical Field

The utility model relates to a solar cell technical field especially relates to a high-efficient solar cell of low-cost back ALD passivation.

Background

A solar cell is also called a "solar chip" or a "photovoltaic cell", and is a photoelectric semiconductor sheet that directly generates electricity by using sunlight. It can output voltage and generate current under the condition of loop as long as it is illuminated by light meeting a certain illumination condition. Physically called solar Photovoltaics (PV), abbreviated photovoltaics, solar cells are devices that directly convert light energy into electrical energy by means of a photoelectric or photochemical effect. Crystalline silicon solar cells working with photovoltaic effect are the mainstream, while thin film solar cells working with photochemical effect are still in the germination stage.

The inside battery piece back internal reflection effect of present solar cell is relatively poor, influences battery conversion efficiency, secondly lacks connection structure between the panel, and the stability that a plurality of panels were fixed on the mounting bracket is lower, so can not satisfy user's demand.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a low-cost back ALD passivated high-efficiency solar cell.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a low-cost backside ALD passivated high efficiency solar cell includes a solar cell body;

the solar cell body comprises a frame, a back plate, a lower EVA adhesive film, a cell piece, an upper EVA adhesive film and glass, wherein the back plate is arranged at the bottom inside the frame, the lower EVA adhesive film, the cell piece, the upper EVA adhesive film and the glass are sequentially arranged above the back plate, the lower EVA adhesive film, the cell piece, the upper EVA adhesive film and the glass are all positioned inside the frame, an alumina film is arranged on the lower surface of the cell piece, and a junction box is fixed on the back surface of the back plate through bolts;

the frame has first joint piece along the welding on length direction's the outside table wall of one side, and threaded connection has a fixing bolt on the first joint piece, set up the first joint groove that the first joint piece of cooperation used on the frame along length direction's the outside table wall of the opposite side, and set up the first bolt hole that the first fixing bolt of cooperation used on the inside bottom plate in first joint groove.

Preferably, the frame has the second joint piece along the welding on length direction's the one end exterior wall, and threaded connection has the second fixing bolt on the second joint piece.

Preferably, a second clamping groove matched with the second clamping block for use is formed in the outer surface wall of the other end of the frame in the length direction, and a second bolt hole matched with the second fixing bolt for use is formed in an inner bottom plate of the second clamping groove.

Preferably, the first clamping blocks are provided with two parts in total, and the two first clamping blocks are mutually symmetrical about the vertical central line of the frame in the length direction.

Preferably, the second clamping blocks are provided with two parts in total, and the two second clamping blocks are mutually symmetrical about the horizontal central line of the frame in the length direction.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses in, this high-efficient solar cell of low-cost back ALD passivation, be provided with the alumina film on the surface of battery piece, the alumina film adopts two kinds of reaction gases of trimethyl aluminium and vapor to carry respectively through high-purity nitrogen gas and gets into the reaction chamber with the form circulation deposit of atom at the battery piece surface formation one deck alumina film that has good passivation effect with the mode of pulse, make this high-efficient solar cell of low-cost back ALD passivation compare with traditional solar cell, good passivation effect has, reduce back of the body defect state density effectively, it is compound to reduce the back of the body surface, improve back internal reflection, solar cell's conversion efficiency has been improved.

2. The utility model discloses in, this high-efficient solar cell of low-cost back ALD passivation is provided with first joint piece, first joint groove, second joint piece and second joint groove on the frame for this adjacent solar cell can be through being connected in first joint piece and first joint groove, perhaps is connected between second joint piece and the second joint groove, forms the integral structure, has improved the fixed stability of a plurality of these solar cells, increases its ability of preventing wind.

Drawings

Fig. 1 is a schematic structural diagram of a low-cost back ALD passivated high-efficiency solar cell according to the present invention;

FIG. 2 is an enlarged view of area A of a low cost back ALD passivated high efficiency solar cell of the present invention shown in FIG. 1;

fig. 3 is a schematic structural diagram of a frame of a low-cost back ALD passivated high-efficiency solar cell according to the present invention.

Illustration of the drawings:

1. a solar cell body; 2. a frame; 3. a junction box; 4. a back plate; 5. an EVA adhesive film is arranged; 6. an aluminum oxide film; 7. a battery piece; 8. applying an EVA adhesive film; 9. glass; 10. a first clamping block; 11. a first fixing bolt; 12. a first clamping groove; 13. a first bolt hole; 14. a second clamping block; 15. a second fixing bolt; 16. a second clamping groove; 17. a second bolt hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-3, a low cost backside ALD passivated high efficiency solar cell comprises a solar cell body 1;

the solar cell body 1 comprises a frame 2, a back plate 4, a lower EVA (ethylene vinyl acetate) adhesive film 5, a cell piece 7, an upper EVA adhesive film 8 and glass 9, wherein the back plate 4 is arranged at the bottom inside the frame 2, the lower EVA adhesive film 5, the cell piece 7, the upper EVA adhesive film 8 and the glass 9 are sequentially arranged above the back plate 4, the lower EVA adhesive film 5, the cell piece 7, the upper EVA adhesive film 8 and the glass 9 are all positioned inside the frame 2, an alumina film 6 is arranged on the lower surface of the cell piece 7, and a junction box 3 is fixed on the back surface of the back plate 4 through bolts;

two reaction gases of trimethylaluminum and water vapor are respectively carried by high-purity nitrogen and enter a reaction cavity in a pulse mode to circularly deposit on the surface of the cell 7 in an atomic mode to form a layer of alumina film 6 with a good passivation effect, so that the cell 7 has the good passivation effect, the defect state density of the back surface of the cell 7 is effectively reduced, the back surface recombination is reduced, and the internal reflection of the back surface of the cell 7 is improved.

Frame 2 has first joint piece 10 along the welding on length direction's the outside table wall of one side, and threaded connection has first fixing bolt 11 on first joint piece 10, has seted up the first joint groove 12 that cooperates first joint piece 10 to use on frame 2 along length direction's the outside table wall of the other side, and has seted up the first bolt hole 13 that cooperates first fixing bolt 11 to use on the inside bottom plate of first joint groove 12.

Frame 2 has second joint piece 14 along the welding on length direction's the one end exterior wall, and threaded connection has second fixing bolt 15 on the second joint piece 14, frame 2 has seted up the second joint groove 16 that cooperation second joint piece 14 used on the other end exterior wall along length direction, and set up the second bolt hole 17 that cooperation second fixing bolt 15 used on the inside bottom plate of second joint groove 16, first joint piece 10 is provided with two altogether, and two first joint pieces 10 are symmetrical each other along length direction's vertical central line about frame 2, second joint piece 14 is provided with two altogether, and two second joint pieces 14 are symmetrical each other along length direction's horizontal central line about frame 2.

The working principle is as follows: this high-efficient solar cell of low-cost back ALD passivation, during the use, can be through frame 2 welding or bolt fastening on solar cell rack, when the longer limit laminating of two adjacent frames 2, can be through in the first joint inslot 12 that first joint piece 10 block on first frame 2 seted up on second frame 2, cooperate first fixing bolt 11 to fix, make two adjacent frames 2 form the integral structure, when the shorter limit laminating of two adjacent frames 2, can be through in the second joint groove 16 that second joint piece 14 blocks on first frame 2 seted up on second frame 2, cooperation second fixing bolt 15 fixes, make and fix and form the integral structure between the solar cell body 1 of mounting bracket.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A low cost backside ALD passivated high efficiency solar cell, characterized by comprising a solar cell body (1);

the solar cell body (1) is composed of a frame (2), a back plate (4), a lower EVA (ethylene vinyl acetate) adhesive film (5), a cell piece (7), an upper EVA adhesive film (8) and glass (9), the back plate (4) is arranged at the bottom inside the frame (2), the lower EVA adhesive film (5), the cell piece (7), the upper EVA adhesive film (8) and the glass (9) are sequentially arranged above the back plate (4), the lower EVA adhesive film (5), the cell piece (7), the upper EVA adhesive film (8) and the glass (9) are all located inside the frame (2), an alumina film (6) is arranged on the lower surface of the cell piece (7), and a junction box (3) is fixed on the back surface of the back plate (4) through bolts;

frame (2) have first joint piece (10) along the welding on length direction's the outside table wall of one side, and threaded connection has first fixing bolt (11) on first joint piece (10), frame (2) have seted up first joint groove (12) that cooperate first joint piece (10) to use along length direction's the outside table wall of the opposite side, and seted up first bolt hole (13) that cooperate first fixing bolt (11) to use on the inside bottom plate of first joint groove (12).

2. The low-cost backside ALD passivated high-efficiency solar cell according to claim 1, wherein a second clamping block (14) is welded on the outer surface wall of one end of the frame (2) along the length direction, and a second fixing bolt (15) is screwed on the second clamping block (14).

3. The low-cost back ALD passivated high-efficiency solar cell according to claim 1, wherein the outer surface wall of the other end of the side frame (2) along the length direction is provided with a second clamping groove (16) used for matching with the second clamping block (14), and an inner bottom plate of the second clamping groove (16) is provided with a second bolt hole (17) used for matching with the second fixing bolt (15).

4. The low-cost backside ALD passivated high-efficiency solar cell according to claim 1, wherein there are two first clamping blocks (10), and the two first clamping blocks (10) are symmetrical to each other about a vertical center line of the frame (2) along the length direction.

5. The low-cost backside ALD passivated high-efficiency solar cell according to claim 3, wherein two second clamping blocks (14) are provided, and the two second clamping blocks (14) are symmetrical to each other about a horizontal center line of the frame (2) along the length direction.