Chain-type alkali polishing production line and chain-type alkali polishing method for crystalline silicon battery piece

A technology of crystalline silicon battery and chain alkali, applied in the direction of circuits, photovoltaic power generation, electrical components, etc., can solve the problems of environmental pollution, achieve the effects of reducing equipment costs and production costs, reducing environmental pollution, and reducing usage

Pending Publication Date: 2019-12-03
苏州昊建自动化系统有限公司
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Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the problem of easily producing NO in the production of crystalline silicon cells in the prior art. x , the problem of polluting the environment, thereby providing a chain type alkali polishing production line for crystalline silicon cells and a chain type alkali polishing method

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  • Chain-type alkali polishing production line and chain-type alkali polishing method for crystalline silicon battery piece
  • Chain-type alkali polishing production line and chain-type alkali polishing method for crystalline silicon battery piece
  • Chain-type alkali polishing production line and chain-type alkali polishing method for crystalline silicon battery piece

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Embodiment Construction

[0034] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, ...

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Abstract

The invention relates to the technical field of solar cell preparation. The invention relates to a chain-type alkali polishing production line and a chain-type alkali polishing method for a crystalline silicon battery piece. The chain-type alkali polishing production line comprises a closed box, the closed box is internally provided with a feeding system, a first acid pickling system, a first water washing system, a first polishing system, a second polishing system, a second water washing system, a second acid pickling system, a third water washing system, a drying system and a discharging system which communicate with one another, wherein each of the first acid pickling system and the second acid pickling system comprises an acid storage tank filled with a hydrofluoric acid solution. Theinvention further discloses a chain-type alkali polishing method for the crystalline silicon battery piece. According to the production line, only the hydrofluoric acid solution is used as the cleaning solution in the acid pickling process, NOx is prevented from being generated from the source, waste water containing HNO3 cannot be discharged, and the problem of environmental pollution in the crystalline silicon solar cell preparation process can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of solar cell preparation, in particular to a chain-type alkali polishing production line for crystalline silicon cells and a chain-type alkali polishing method. Background technique [0002] High efficiency and low cost are the development direction of the solar cell industry today. To improve the efficiency of high-efficiency solar cells, it is necessary to treat the front and back sides differently. One of the factors affecting the minority carrier life and efficiency of the battery is the surface recombination speed, and the surface recombination speed is related to the morphology, specific area and passivation quality of the front and back surfaces of the crystalline silicon wafer. Another factor affecting cell efficiency is the light trapping ability of the cell, which depends on the refractive index of the front surface and the reflectivity of the back surface. Therefore, the condition of the back s...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L21/02H01L21/67H01L31/18
CPCH01L21/02013H01L21/02052H01L21/67086H01L31/1804Y02E10/547Y02P70/50
Inventor 吴章平崔水炜
Owner 苏州昊建自动化系统有限公司
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