Passivation method and device for sliced battery, sliced battery and photovoltaic module

A slicing and battery technology, applied in photovoltaic power generation, electrical components, circuits, etc., can solve problems such as limiting the progress of photovoltaic module development, photovoltaic module power loss, and slicing battery efficiency loss, etc., to improve photoelectric efficiency, good photoelectric efficiency, The effect of good photoelectric conversion efficiency
CN110137271AActive Publication Date: 2019-08-16LONGI SOLAR TECH (TAIZHOU) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
LONGI SOLAR TECH (TAIZHOU) CO LTD
Publication Date
2019-08-16

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Abstract

The invention provides a passivation method for a sliced battery, comprising the steps of: performing an ozonization treatment on the fracture surface of the sliced battery, wherein the ozonization treatment includes: spraying an ozone-containing passivation gas onto the fracture surface of the sliced battery at room temperature. There is also provided a passivation device for the sliced battery,comprising a passivation chamber capable of accommodating at least one sliced battery, and an ozone spraying unit for spraying the passivation gas onto the fracture surface of the sliced battery. A battery slice obtained by using the passivation method and a photovoltaic module composed of the battery slice are also provided. The passivation method and device can form a silicon dioxide protectivelayer on the fracture surface of the sliced battery to avoid recombination of photo-generated carriers on the fracture surface, thereby greatly improving the photoelectric efficiency of the sliced battery.
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Description

technical field

[0001] The invention relates to the technical field of photovoltaic sliced ​​batteries, in particular to a passivation method and device for sliced ​​batteries, sliced ​​batteries and photovoltaic modules. Background technique

[0002] In recent years, photovoltaic technology has developed very rapidly, and the conversion efficiency of industrialized high-efficiency crystalline silicon cells has increased by about 0.5% absolute efficiency per year. With the improvement of the efficiency of crystalline silicon cells, the current density of crystalline silicon cells has also increased, and has exceeded 40.3 mA / cm2. As the current density of crystalline silicon cells rises sharply, the current of the entire cell also increases significantly, resulting in high power loss in the traditional way of photovoltaic modules formed by electrical interconnection of entire cells.

[0003] With the rapid development of laser technology, laser slicing has become a very econ...

Claims

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