CN106784142A - Solar battery slice etching device and method - Google Patents

Abstract

The present invention relates to a kind of solar battery slice etching device and method, the device includes：Loader mechanism, for solar battery sheet whne making herbs into wool surface down when fix and solar battery sheet and control solar battery sheet to rotate；And liquid feed device, it is placed on the lower section of loader mechanism, liquid feed device includes multiple nozzles and multiple control pieces, each nozzle is used to spray Woolen-making liquid to the correspondence position for treating making herbs into wool surface of solar battery sheet upwards, multiple control pieces are corresponded with multiple nozzles, each control piece is used to control the Woolen-making liquid injection flow of nozzle corresponding with the control piece, and solar battery slice etching device and method of the invention has the good making herbs into wool uniformity and can improve product quality.

Description

Texturing device and method for solar cells

technical field

The invention relates to a texturing device and method for solar cells, in particular to a texturing device and method for solar cells.

Background technique

During the manufacturing process of crystalline silicon solar cells, it is necessary to go through a texturing process, that is, a certain thickness of substrate material is removed from the surface to form a pyramid-shaped surface. Referring to Fig. 1 and Fig. 2, the traditional way of this method is to fix the solar cells 11 on the processing table 15, and there is a nozzle 13 above the solar cells 11 to spray the texturing liquid downward.

This method brings a problem of poor texturing uniformity. For example, in FIG. When spraying on the surface, the dosage of the concave and convex parts is different, resulting in uneven texture, and the texture near the injection point is serious. When the solar battery sheet 11 has graphic bumps, since there is more texturing liquid near the injection point, the bumps closer to the injection point are likely to cause serious corner cutting, which affects the properties of the solar cell.

Contents of the invention

A brief overview of the invention is given below in order to provide a basic understanding of some aspects of the invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to identify key or critical parts of the invention nor to delineate the scope of the invention. Its purpose is merely to present some concepts in a simplified form as a prelude to the more detailed description that is discussed later.

A main object of the present invention is to provide a solar cell texturing device and method with good texturing uniformity and timely adjustment of the jet flow according to the needs of the texturing position.

To achieve the above object, the present invention provides a solar cell texturing device, comprising: a loading mechanism for fixing the solar cell and controlling the rotation of the solar cell when the surface of the solar cell to be textured faces downward; The liquid device is placed under the loading mechanism. The liquid supply device includes a plurality of nozzles and a plurality of control parts. Each nozzle is used to spray texturing liquid upward to the corresponding position of the surface of the solar cell sheet to be textured. The plurality of control parts and A plurality of nozzles correspond to each other, and each control member is used to control the spraying flow rate of the texturing liquid of the nozzle corresponding to the control member.

Optionally, a plurality of nozzles are arranged in a ring.

Optionally, a plurality of nozzles are arranged in an "X" shape.

Optionally, multiple nozzles are arranged in a lattice.

Optionally, each control member is a solenoid valve provided on the transmission pipeline of the corresponding nozzle.

In order to achieve the above object, the present invention also provides a method for jet texturing of solar cells, comprising the following steps: fixing the surface of the solar cells to be textured downwards on the loading mechanism, and controlling the rotation of the solar cells through the loading mechanism ; and adjust the flow rate of each nozzle on the liquid supply device through each control part of the liquid supply device, and spray the texturing liquid upward to the corresponding position of the surface to be textured of the solar cell sheet through a plurality of nozzles.

Optionally, the jet texturing method for solar cells controls the flow rate of the nozzles by operating solenoid valves arranged on the conveying pipes of the nozzles.

The present invention makes the surface of the solar battery sheet to be textured face down, and sprays the texturizing liquid upward on the surface of the solar battery sheet to be textured. Due to the effect of gravity, the unevenness of the surface of the solar battery sheet to be textured is avoided. The problem of uneven texturing, and the problem of inscribed corners of the graphic bumps on the solar cell sheet are also avoided. Since the present invention uses a plurality of nozzles to spray on different positions of the surface of the solar cell sheet to be textured, it avoids the problem of different degrees of texturing caused by single nozzle spraying, and each nozzle is set to control the flow rate. According to the needs of the product, the flow rate of any nozzle can be adjusted in time, which improves the texturing efficiency and product quality.

Description of drawings

The above and other objects, features and advantages of the present invention will be more easily understood with reference to the following description of the embodiments of the present invention in conjunction with the accompanying drawings. The components in the drawings are only to illustrate the principles of the invention. In the drawings, the same or similar technical features or components will be denoted by the same or similar reference numerals.

Fig. 1 is a working schematic diagram of an existing solar cell texturing device.

Fig. 2 is a schematic structural view of an embodiment of the texturing device for solar cells of the present invention.

FIG. 3 , FIG. 4 , and FIG. 5 are schematic diagrams of the arrangement of the nozzles in FIG. 2 .

detailed description

Embodiments of the present invention will be described below with reference to the drawings. Elements and features described in one drawing or one embodiment of the present invention may be combined with elements and features shown in one or more other drawings or embodiments. It should be noted that representation and description of components and processes that are not related to the present invention and known to those of ordinary skill in the art are omitted from the drawings and descriptions for the purpose of clarity.

Referring to FIG. 2 , an embodiment of the solar cell texturing device of the present invention includes a loading mechanism 20 and a liquid supply device 30 . The loading mechanism is used to fix the solar cell 11 and control the rotation of the solar cell 11 when the surface to be textured of the solar cell 11 faces downward. The liquid supply device 30 is placed under the loading mechanism 20 and includes a plurality of nozzles 31 and a plurality of control parts, and each nozzle 31 is used to spray the texturing liquid upward to the corresponding position of the surface to be textured of the solar cell 11 . A plurality of control elements correspond to the above-mentioned plurality of nozzles 31 one by one, and each control element is used to control the spraying flow rate of the texturing liquid of the nozzle 31 corresponding to the control element. By operating each control member, the spraying of the texturing liquid can be stopped at the position where the texturing is not needed, or the injection amount of the texturing liquid can be adjusted as required, and the flow rate of the corresponding nozzle 31 can be adjusted in time as required.

Optionally, the above-mentioned multiple nozzles 31 can be arranged in various shapes, such as a ring arrangement in FIG. 3, an “X” arrangement in FIG. 4, and a grid arrangement in FIG. Among them, the plurality of nozzles 31 may also be arranged in other shapes.

Optionally, each control member is a solenoid valve 33 provided on the delivery pipeline of the corresponding nozzle 31 (such as the delivery pipeline 32 in FIG. 2 ).

The present invention also provides a solar cell jet texturing method based on the above-mentioned solar cell texturing device, one embodiment of which includes the following steps: Step S1: Fix the surface of the solar cell 11 to be textured downwards on the The loading mechanism 20 is used to control the rotation of the solar cells 11 through the loading mechanism 20 .

Step S2: Adjust the flow rate of each nozzle 31 on the liquid supply device 30 through each control part of the liquid supply device 30, and spray the texturing liquid upwards to the corresponding position of the surface to be textured of the solar cell 11 through the above-mentioned multiple nozzles 31.

Optionally, in step S2, the solar cell sheet jet texturing method controls the flow rate of the nozzles by operating the solenoid valve 33 provided on the delivery pipe 32 of each nozzle 31 .

In the above-mentioned solar cell texturing device and method, due to the effect of gravity, the texturing liquid will not accumulate in the concave portion of the surface to be texturized or the root of the graphic convex point, which can avoid the problem of uneven texturing caused by unevenness As well as the problem of the near-cutting angle of the bump, by spraying multiple nozzles corresponding to different positions, the problem of excessive texturing caused by the proximity to the nozzle or insufficient texturing caused by the distance from the nozzle is overcome. When designing solar cells with bumps, it is possible to avoid chamfering at the bumps and affecting product quality.

In the device of the present invention, it is obvious that the various parts can be disassembled, combined and/or disassembled and reassembled. These decompositions and/or recombinations should be considered equivalents of the present invention. In the above description of specific embodiments of the present invention, features described and/or illustrated for one embodiment can be used in the same or similar manner in one or more other embodiments, and features in other embodiments Combination or replacement of features in other embodiments.

It should be emphasized that the term "comprising/comprising" when used herein refers to the presence of a feature, element, step or component, but does not exclude the presence or addition of one or more other features, elements, steps or components.

Although the present invention and its advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made hereto without departing from the spirit and scope of the invention as defined by the appended claims. Moreover, the scope of the present invention is not limited to the specific embodiments of the procedures, means, means, methods and steps described in the specification. Those of ordinary skill in the art will readily appreciate from the disclosure of the present invention that existing and future designs that perform substantially the same function or obtain substantially the same results as the corresponding embodiments described herein can be used in accordance with the present invention. The developed process, device, means, method or steps. Accordingly, the appended claims are intended to include within their scope such processes, means, means, methods or steps.

Claims (7)

1. a kind of solar battery slice etching device, it is characterised in that including：Loader mechanism, in solar battery sheet Whne making herbs into wool surface down when fix the solar battery sheet and control the solar battery sheet to rotate；And liquid feed device, The lower section of the loader mechanism is placed on, the liquid feed device includes multiple nozzles and multiple control pieces, and each nozzle is used for upward Woolen-making liquid, the multiple control piece and the multiple spray are sprayed to the correspondence position for treating making herbs into wool surface of the solar battery sheet Mouth is corresponded, and each control piece is used to control the Woolen-making liquid injection flow of nozzle corresponding with the control piece.

2. solar battery slice etching device as claimed in claim 1, it is characterised in that：The multiple nozzle is annularly arranged Row.

3. solar battery slice etching device as claimed in claim 1, it is characterised in that：The multiple nozzle is arranged in X-shaped Row.

4. solar battery slice etching device as claimed in claim 1, it is characterised in that：The multiple nozzle is arranged in clathrate Row.

5. the solar battery slice etching device as described in claim any one of 1-4, it is characterised in that each control piece is It is arranged on the magnetic valve on the transmission pipeline of corresponding nozzle.

6. a kind of solar battery sheet based on any described solar battery slice etching devices of claim 1-5 sprays making herbs into wool Method, it is characterised in that including：Solar battery sheet is treated that making herbs into wool surface is fixed on loader mechanism down, and by institute State loader mechanism and control the solar battery sheet rotation；And it is each on each control piece regulation liquid feed device for passing through liquid feed device The flow of nozzle, and making herbs into wool is sprayed to the correspondence position for treating making herbs into wool surface of the solar battery sheet upwards by multiple nozzles Liquid.

7. solar battery sheet as claimed in claim 6 sprays etching method, it is characterised in that the solar battery sheet spray Penetrate flow of the etching method by nozzle described in solenoid valve control of the operation setting on the transmission pipeline of each nozzle.