Battery piece, battery piece matrix, solar battery, and battery piece preparation method
A cell and silicon wafer technology, applied in the field of solar cells, can solve the problems of cell efficiency decline, cumbersome welding process, large silver paste, etc., and achieve the effect of high power and good leakage resistance
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[0091] Specifically, the preparation method includes the following steps A, B and C.
[0092] Step A: Obtain a silicon substrate 11 . For example, a plurality of silicon substrates 11 can be obtained by dividing the square conventional silicon substrate body at least once according to the rule of constant length.
[0093] Step B: preparing the front diffusion layer 12 , the side interlayer and the back interlayer on the silicon substrate 11 to obtain the silicon wafer 1 . Specifically, the front diffusion layer 12 is prepared on the light-receiving surface of the silicon substrate 11, the side interlayer is processed on the side surface, and the back interlayer is prepared on the backlight surface.
[0094] For example, in a specific example of the present invention, the side spacer is the same type as the front diffusion layer 12 and is covered with a side diffusion layer 13 on the side surface, and the back side spacer is the same type as the front diffusion layer 12 and is...
Embodiment 1
[0120] The solar cell includes: a first panel, a first insulating layer, a cell matrix 1000, a second insulating layer and a second panel arranged in sequence from the light-receiving side to the backlight side, wherein the cell matrix 1000 is the above-mentioned first cell array 100A That is to say, a plurality of cell sheets 100 are arranged sequentially and connected in series according to the same arrangement form (for example, the arrangement form in which the light-receiving surfaces all face the rear and the side electrodes 3 all face downward).
[0121] At this time, since the plurality of battery sheets 100 in a single row are arranged in the same form, the second electrode 5 of each battery sheet 100 is adjacent to the first electrode 4 of the previous battery sheet 100, in other words, each The first electrode 4 of the battery sheet 100 is adjacent to the second electrode 5 of the next battery sheet 100, thus, a conductive strip 1001 (such as a welding strip) can be ...
Embodiment 2
[0125] The second embodiment is generally the same as the first embodiment, the only difference is that: the cell array 1000 is a third cell array 100C. For example, the first solar cell array 100A can be formed into the third solar cell array 100C in the manner of "three in parallel and then two in series". Therefore, when packaging the above-mentioned back-contact battery, the following steps can be adopted: first, a plurality of battery slices 100 are arranged in a multi-row array in a single column, and then two adjacent battery slices 100 are connected to each other by using a conductive strip 1001 (such as a welding strip). Connect them in series to get the first cell array 100A, then use the bus bar 1002 to connect the six first cell arrays 100A in parallel to form two second cell arrays 100B, and then connect the two second cell arrays 100B in series A third cell array 100C is formed to obtain a cell matrix 1000, and then the positive and negative electrodes are drawn ...
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