All-black solar photovoltaic module and manufacturing method thereof

Abstract

The invention discloses an all-black solar photovoltaic module and a manufacturing method thereof, and the all-black solar photovoltaic module sequentially comprises a light transmission layer, a first EVA adhesive film layer, a cell array, a second EVA adhesive film layer and a backboard from the top to the bottom. The battery array comprises a plurality of battery pieces arranged in a matrix, wherein each column of battery pieces are sequentially connected into a battery string through an interconnection strip solder strip, and a gap is formed between every two battery pieces in the middle of each battery string; the interconnection strip solder strips in the gaps are connected through a first bus bar which is connected with a second bus bar being perpendicular to the first bus bar in the horizontal direction and penetrating through the back plate; the interconnection strip solder strips at the two ends of the battery string are connected through a third bus bar; the front surfaces of the first bus bar and the third bus bar are completely covered by the black isolating bar; one end of the second bus bar is fixed on the back surface of the first bus bar, and the other end obliquely penetrates through the backboard. According to the invention, a real all-black appearance effect can be achieved, and the quality and the market competitiveness are improved.

Description

technical field [0001] The invention relates to an all-black solar photovoltaic module and a manufacturing method thereof. Background technique [0002] All-black solar photovoltaic modules are becoming more and more popular due to their consistent and beautiful appearance. Currently, all-black solar photovoltaic modules on the market mainly include the following three types: [0003] 1. Silver bus bars are used directly, and the rest of the materials are black, but the silver bus bars of this type of component are still exposed from the outside, so in a real sense, this type of component still cannot achieve the effect of "all black"; [0004] 2. Use black isolation to cover the head and tail bus bars, but not in the middle, and the rest of the materials are black. However, from the appearance of this type of component, the silver bus bar in the middle is still exposed, so in a real sense, this type of component is also The effect of "all black" cannot be achieved; [000...

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Problems solved by technology

[0003] 1. Silver bus bars are used directly, and the rest of the materials are black, but the silver bus bars of this type of component are still exposed from the outside, so in a real sense, this type of component still cannot achieve the effect of "all black";

[0004] 2. Use black isolation to cover the head and tail bus bars, but not in the middle, and the rest of the materials are black. However, from the appearance of this type of component, the silver bus bar in the middle is still exposed, so in a real sense, this type of component is also The effect of "all black" cannot be achieved;

[0005] 3. Use black isolation to cover the head, tail and middle bus bars to achieve a completely black component, but this type of component will see 6 white spots at the bend of the lead-out line on the front of the glass, so in a real sense, this type of component Can't achieve the effect of "all black"

[0006] According to market reflections, the third type of all-black solar photovoltaic modules is currently popular. Through experimental analysis, the applicant found that the reason for the white spots on the third type of all-black solar photovoltaic modules is because such modules are vertically positioned. Conventional lead-out process perpendicular to the horizontal plane of photovoltaic modules (such as figure 1 As shown), the lead wire will be laminated after being bent. During the lamination process, the pressure will squeeze out the EVA glue between the lead wire bend and the glass, resulting in white spots caused by the lack of glue. There will be a risk of expanding the range of missing glue, so there is a quality risk

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