Solar cell irradiation annealing furnace

A technology for solar cells and annealing furnaces is applied in the field of irradiation annealing treatment of solar cells, which can solve the problems of not considering the cooling of cells, affecting the effect of irradiation annealing treatment, etc., so as to solve the problems of large-scale production and structure of on-line treatment. Simple, well-designed effects

Active Publication Date: 2017-12-29
BEIJING SOLARRAY TECHNOIOGY CO LTD +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, to complete the irradiation annealing treatment within 30S~60S, realize online continuous production on the solar cell production line, or reduce the LID to below 1% or less, this requires that the intensity of the light source is sufficiently large and the processing The temperature must be controllable. The existing radiation annealing furnace generally heats the battery while the light source is irradiating the battery, and does not consider the cooling of the battery sheet. This technical solution is not strong enough for the light source, and the processing time is relatively long However, when the intensity of the light source irradiating the cell is large enough, the temperature of the cell irradiated by the light source alone has exceeded the optimum temperature range, which will greatly affect the effect of irradiation annealing

Method used

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Embodiment 1

[0024] Such as Figure 1-2 As shown, the solar cell radiation annealing furnace of the present invention includes a furnace body, the furnace body includes an upper furnace body 1 and a lower furnace body 7, and the upper furnace body 1 and the lower furnace body 7 are connected by a support or a lifting mechanism, To facilitate the inspection and maintenance of the annealing furnace, a light source 2 is arranged in the upper furnace body 1, and a transparent heat insulating material layer 3 is arranged between the upper furnace body 1 and the lower furnace body 7 corresponding to the light source 2, and the cell sheet transmission device 4 and the lower furnace body 7 are arranged in the lower furnace body 7 The temperature sensor 5 and the battery sheet 9 are horizontally transmitted on the battery sheet conveying device 4 and are irradiated by the light source 2. An air inlet 11 or a blowing device 10 is arranged on the side of the furnace body between the battery sheet 9 an...

Embodiment 2

[0028] The battery sheet transport device 4 is a stainless steel mesh belt that circulates in and out of the irradiation annealing furnace, and the rest are the same as in Embodiment 1.

[0029] Working principle and use process of the present invention:

[0030] When the solar cell radiation annealing furnace is in use, turn on the light source 2, place the battery sheet 9 on the horizontally arranged ceramic roller table or on the stainless steel mesh belt that circulates in and out of the radiation annealing furnace, and pass between the upper furnace body 1 and the lower furnace body 7 A transparent heat insulating material layer 3 is set to isolate the light source 2 from the chamber in which the cells 9 are processed. The cells 9 are transported on a horizontally arranged ceramic roller table or on a stainless steel mesh belt that circulates in and out of the irradiation annealing furnace, and are received in the furnace. Irradiation of a light source 2 inside a body 1 ....

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Abstract

The present invention relates to a solar cell irradiation annealing furnace that can be used for irradiation annealing processing of a solar cell. The solar cell irradiation annealing furnace comprises a furnace body. The furnace body comprises an upper furnace body and a lower furnace body. The upper furnace body is internally provided with a light source. A transparent heat insulation material layer corresponding to the light source is disposed between the upper furnace body and the lower furnace body. The lower furnace body is internally provided with a cell sheet transport device and a temperature sensor. A cell sheet is horizontally transported on the cell sheet transport device and is irradiated by the light source. An air inlet or a blowing device is disposed on a side surface of the furnace body between the cell sheet and the transparent heat insulation material layer. A heating device is disposed below the cell sheet. The furnace body is internally provided with an exhaust device matched with the air inlet or the blowing device. The light source, cell sheet transport device, blowing device, temperature sensor, heating device and exhaust device are connected with a controller. The solar cell irradiation annealing furnace has a simple structure and a reasonable design, can heat or cool the cell sheet, can control temperature at a proper level, and has high practicability.

Description

technical field [0001] The invention relates to a solar cell radiation annealing furnace, which can be used for the radiation annealing treatment of the solar cell. Background technique [0002] For P-type crystalline silicon solar cells, due to the existence of boron-oxygen pairs, the efficiency attenuation phenomenon (LID phenomenon) will occur in the early stage of use in the sunlight environment, especially the high-efficiency PERC cells that have emerged in recent years. This light-induced attenuation phenomenon especially serious. Studies have shown that using a specific light source in advance to irradiate and anneal the cells under certain temperature conditions can effectively prevent this light decay phenomenon from occurring. This technology has been theoretically broken and verified, and the processing effect of existing equipment can reduce LID from about 5% to 1.5% to 2%. However, to complete the irradiation annealing treatment within 30S~60S, realize online ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/18
CPCH01L31/1864Y02E10/50Y02P70/50
Inventor 袁向东许颖袁瑒
Owner BEIJING SOLARRAY TECHNOIOGY CO LTD
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