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Solar cell string and method for making the same

A technology for solar cells and cell sheets, applied in the field of solar cells, can solve the problems of low conductivity of conductive adhesive, resin adhesion method, low power, poor stability, etc., and achieve the effects of reducing module efficiency loss, low viscosity and tight arrangement

Active Publication Date: 2021-06-29
SHENZHEN BAROY NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in this solar cell module, adjacent cells are also connected by conductive glue. Due to the low conductivity of the conductive glue and the way the resin is attached, the stability of the module is poor and the power is low.

Method used

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  • Solar cell string and method for making the same
  • Solar cell string and method for making the same
  • Solar cell string and method for making the same

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0040] A solar battery module, two battery slices are connected in series and parallel to obtain a battery group; at least two battery groups are connected in series to obtain a solar battery module. The specific implementation is as follows: each battery pack includes 6 battery slices connected in parallel in series. Each cell series contains 17 cell units that are overlapped and connected in series through conductive paste. The cell unit is made by cutting a solar cell into 5 equal parts. The four battery packs are arranged in two rows, and each row is provided with two battery packs. When there are more battery packs, it can be arranged in multiple rows in a similar manner, and each row contains two or more battery packs.

[0041] Of course, the invention is not limited to any one form of assembly.

[0042] A method for preparing a solar cell string according to an embodiment, such as image 3 shown, including the following steps:

[0043] S10, providing at least two b...

Embodiment 1

[0051] First of all, according to the design pattern, the first battery sheet unit is placed upright, and the conductive ink is supplied to the non-contact inkjet printing device. The non-contact inkjet printing device includes an inkjet printing nozzle, the nozzle and the first battery sheet unit The positive electrode of the battery cell is set in parallel, and the conductive ink forms ink droplets from the nozzles. The diameter of the ink droplet is 0.05mm. The conductive ink is sprayed on the positive electrode of the first cell unit. The viscosity of the sprayed conductive ink is 50cps, and then the second The back electrode 1142 on the back of the two cell units (located on the left side of the second cell cut sheet) overlaps and covers the positive electrode 1122 of the first cell cut sheet (located on the right side of the first cell cut sheet). Similarly, repeat the above steps, connect the back electrode 1142 (located on the left side of the third battery cutting shee...

Embodiment 2

[0054] First of all, according to the design pattern, the first battery sheet unit is placed upright, and the conductive ink is supplied to the non-contact inkjet printing device. The non-contact inkjet printing device includes an inkjet printing nozzle, the nozzle and the first battery sheet unit The positive electrode of the battery cell is set in parallel, and the conductive ink forms an ink drop from the nozzle hole. The diameter of the ink drop is 0.1mm. The conductive ink is sprayed on the positive electrode of the first cell unit. The viscosity of the sprayed conductive ink is 100cps, and then the second The back electrode 1142 on the back of the two cell units (located on the left side of the second cell cut sheet) overlaps and covers the positive electrode 1122 of the first cell cut sheet (located on the right side of the first cell cut sheet). Similarly, repeat the above steps, connect the back electrode 1142 (located on the left side of the third battery cutting shee...

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Abstract

The invention relates to a solar battery string and a preparation method thereof. Two adjacent cell units in the solar cell string are overlapped and connected in series. The cell unit includes a front side for absorbing light radiation and a back side opposite to the front side. The front side is provided with a positive electrode for collecting current. A back electrode is provided, the positive electrode of the cell unit is connected to the back electrode of the adjacent cell unit through conductive ink, and the conductive ink forms an ohmic contact with the positive electrode of the cell unit and the back electrode of the adjacent cell unit . The cell cut sheets in the cell series formed by the solar cell string are closely arranged, and the non-power generation area is small. The back electrode of the cell unit forms an ohmic contact, and the contact resistance is much lower than that of the conductive adhesive and the metallurgical layer of the ribbon welding. , reduce the loss of component efficiency, and improve the power of the component.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a solar cell string and a preparation method thereof. Background technique [0002] As a new energy source, solar energy has the advantages of being inexhaustible, clean and environmentally friendly compared with traditional fossil fuels. At present, the main solar energy utilization method is to convert the received light energy into electrical energy output through solar cell components. The traditional solar cell component is formed by connecting several solar cells (or photovoltaic cells) in series and then packaging them in a square array. large-area battery components. Among them, the solar cell sheet absorbs light energy, and the accumulation of charges of opposite signs occurs at both ends of the battery, which generates "photovoltaic voltage", which is the "photovoltaic effect". Under the action of the photovoltaic effect, the two ends of the solar cell generate ele...

Claims

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Application Information

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IPC IPC(8): H01L31/05H01L31/18
CPCH01L31/0508H01L31/1876Y02E10/50Y02P70/50
Inventor 郭冉
Owner SHENZHEN BAROY NEW MATERIAL TECH CO LTD
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