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Solar cell module

A technology for solar cells and battery packs, applied in the field of solar cells, can solve problems such as cell mismatch loss, component resistance loss, and component light loss.

Inactive Publication Date: 2015-08-26
GCL SYST INTEGRATION TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the module efficiency will be much lower than the cell efficiency, and there are several factors affecting the difference: (1) the actual power generation area of ​​the module is smaller than the module area; (2) the resistance loss in the module; (3) the light loss of the module; (4) ) cell mismatch loss

Method used

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  • Solar cell module
  • Solar cell module
  • Solar cell module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] ginseng Figure 3 to Figure 5 , The solar cell module is composed of four battery packs connected in series. Each battery pack includes six battery strings 100 connected in parallel. Each battery string 100 includes 17 overlapping battery slices 100 connected in series. The battery sheet 100 is made by cutting a solar sheet into 5 equal parts. Four batteries are arranged in two rows, and two battery packs are arranged in each row. 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.

[0045] In addition, due to the hot spot characteristics of solar cells, under certain conditions, a shaded solar cell in a series branch will be used as a load to consume energy generated by other illuminated solar cells. The shaded solar cell assembly will generate heat at this time, which will affect the efficiency of a string of solar cell sheets, resulting in lower efficiency of the entire solar...

Embodiment 2

[0048] ginseng Figure 6 to Figure 8 , The solar cell module is composed of four battery packs connected in series. Each battery pack includes six battery strings 100 connected in parallel. Each battery string 100 includes 17 overlapping battery slices 100 connected in series. The battery sheet 100 is made by cutting a solar sheet into 5 equal parts. Four batteries are arranged in two rows, and each row is provided with two battery packs.

[0049] In addition, each battery group is connected to a solar cell module junction box 200 , and the solar cell module junction box 200 is provided with four diodes (not shown), and each battery group is connected in parallel with a diode 210 . In this way, the six battery strings 100 in each battery pack are respectively connected with diodes in parallel, and when a certain battery string 100 has a hot spot with low current, the current passes through the diodes to avoid energy loss.

Embodiment 3

[0051] ginseng Figure 9 to Figure 11 , The solar cell module is composed of four battery packs connected in series. Each battery pack includes six battery strings 100 connected in parallel. Each battery string 100 includes 17 overlapping battery slices 100 connected in series. The battery sheet 100 is made by cutting a solar sheet into 3 equal parts. Such as Figure 11 , the four battery packs are arranged sequentially along a straight line. When there are more battery packs, it is also arranged like this.

[0052] In addition, each battery pack is connected in parallel to a junction box 200 of the solar battery module, and the junction box 200 of the solar battery module is provided with a diode 210 . In this way, the six battery strings 100 in each battery pack are connected in parallel with diodes 210, and when a certain battery string 100 has a hot spot with low current, the current passes through the diodes 210 to avoid energy loss.

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Abstract

The invention relates to a solar cell module. The solar cell module comprises at least two battery packs. The battery packs are connected in series. Each battery pack comprises at least two battery piece tandems which are connected in parallel. Each battery piece tandem comprises at least two battery pieces which are connected in series. In the same battery piece tandem, two adjacent battery units are overlapped and connected in series. By using the solar cell module, the adjacent battery pieces are overlapped and connected so that arrangement of the battery pieces in the battery piece tandem is tight and an area which does not generate power is small. Besides, the adjacent battery pieces are overlapped and connected so that a conductive contact area is large and resistor losses are reduced.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a solar cell component. Background technique [0002] At present, the efficiency improvement of photovoltaic cells on the market has reached a bottleneck stage, and the existing photovoltaic modules hardly contribute to the efficiency improvement. Usually, the module efficiency will be much lower than the cell efficiency, and there are several factors affecting the difference: (1) the actual power generation area of ​​the module is smaller than the module area; (2) the resistance loss in the module; (3) the light loss of the module; (4) ) cell mismatch loss. [0003] In traditional photovoltaic modules, adjacent cells are interconnected by ribbons. This interconnection structure determines that the first two forms of loss in the module are inevitable. Contents of the invention [0004] Based on this, it is necessary to provide a solar cell module that can reduce the non-p...

Claims

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Application Information

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IPC IPC(8): H02S40/36H02S40/34
CPCH01L31/0224H01L31/05Y02E10/50H02S40/00H01L31/0504
Inventor 李宗法吕春芳张凤李蔚
Owner GCL SYST INTEGRATION TECH