CN215815910U

CN215815910U - Battery piece texturing and cleaning equipment

Info

Publication number: CN215815910U
Application number: CN202120322277.1U
Authority: CN
Inventors: 赵赞良; 解赵波; 王肖肖; 杨明明; 安艳龙; 张冬冬
Original assignee: Ningxia Longi Solar Technology Co Ltd
Current assignee: Ningxia Longi Solar Technology Co Ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2022-02-11
Anticipated expiration: 2031-02-03

Abstract

The utility model discloses a battery piece texturing and cleaning device which is used for reducing metal ions in a drying groove and improving the yield and quality of battery pieces. The battery piece texturing and cleaning equipment comprises a drying groove, an air supply structure, a circulating pipeline and a magnetic pipeline. The air supply structure is communicated with the drying groove through a magnetic pipeline, and the drying groove is communicated with the air supply structure through a circulating pipeline. The battery piece texturing and cleaning equipment provided by the utility model is used for processing battery pieces.

Description

Battery piece texturing and cleaning equipment

Technical Field

The utility model relates to the technical field of solar cells, in particular to a battery piece texturing and cleaning device.

Background

In the process of etching and cleaning the battery piece, the cleaned battery piece needs to be dried in an etching and cleaning machine and then can be discharged. In order to prevent the frame-like defects of the battery sheet without affecting the performance of the battery sheet, it is required that the drying bath be free from impurities. However, the existing drying tank is basically made of metal, and the drying tank made of metal is corroded in acidic and alkaline environments in the wool making cleaning machine to generate metal ions. Meanwhile, metal ions may also be present in the gas introduced into the drying tank. The metal ions can be attached to the surface of the battery piece under the action of circulating air in the drying groove, so that the performance of the battery piece is influenced.

The mode of solving at present is through the inside and outside both sides parcel polyvinylidene fluoride membrane of the cell body in drying groove to avoid the cell body of drying groove and acidic and alkaline environment direct contact, thereby avoid the cell body of drying groove to produce metal ion, but other metal parts such as the inside impeller of the cell body that is located the drying groove still can produce metal ion, and also can have metal ion in the gas that lets in the drying groove, can not thoroughly solve the problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a battery piece texturing and cleaning device which is used for reducing metal ions in a drying groove and improving the yield and quality of battery pieces.

The utility model provides a battery piece texturing and cleaning device. The battery piece texturing and cleaning equipment comprises a drying groove, an air supply structure, a circulating pipeline and a magnetic pipeline. The air supply structure is communicated with the drying groove through a magnetic pipeline, and the drying groove is communicated with the air supply structure through a circulating pipeline.

Under the condition of adopting the technical scheme, in the battery piece texturing and cleaning equipment provided by the utility model, the gas supply structure is communicated with the drying groove through the magnetic pipeline, so that gas in the gas supply structure enters the drying groove after passing through the magnetic pipeline. When the gas in the gas supply structure passes through the magnetic pipeline, the magnetic pipeline can adsorb metal ions in the gas so as to reduce the metal ions in the gas introduced into the drying groove. Meanwhile, the drying groove is communicated with the air supply structure through a circulating pipeline, so that metal ions generated in the drying groove are driven by circulating air to enter the air supply structure through the circulating pipeline, and enter the drying groove along with the air in the air supply structure after passing through the magnetic pipeline. Because the magnetic pipeline can adsorb the metal ions in the gas passing through the magnetic pipeline, the metal ions are prevented from being attached to the surface of the battery piece, and the yield and the quality of the battery piece are improved.

In a possible implementation manner, the magnetic pipeline is a pipeline formed by a magnetic material.

In one possible implementation, the magnetic pipeline includes a pipeline body and a magnetic layer formed on an inner wall of the pipeline body.

In one possible implementation, the magnetic pipeline includes a pipeline main body and a magnetic filter screen formed in the pipeline main body.

In a possible implementation, the gas supply structure comprises a plurality of filtering elements distributed along the gas flow direction.

Adopt under the condition of above-mentioned technical scheme, through setting up a plurality of filtration pieces, can promote the filtration efficiency of the gas in the air feed structure to reduce as far as or avoid letting in the impurity in the gas in the stoving groove.

In a possible realization, the filtration efficiency of the plurality of filter elements increases gradually in the gas flow direction.

Adopt under the condition of above-mentioned technical scheme, along the gas flow direction, through setting up the filtration piece of different filtration efficiency, realize the successive layer and filter to improve the life who filters the piece, make the content of the impurity of the gas that lets in the drying groove as far as possible.

In a possible implementation, each of the plurality of filter members includes a filter element, and the aperture of the filter element included in each of the filter members is gradually reduced in the gas flow direction.

In a possible implementation, the at least one filter element is a magnetic filter element.

Under the condition of adopting above-mentioned technical scheme, because filter for the magnetism filters the piece for metal ion in the gas that flows through filter is adsorbed by the magnetism filter piece, thereby reduces or avoids letting in the metal ion that contains in the gas in the drying groove. Meanwhile, the workload of the magnetic pipeline is reduced, and the service life of the magnetic pipeline is prolonged.

In a possible implementation, the material of the at least one filter element is a magnetic material.

In a possible implementation, the material of the filter element of the at least one filter element is a magnetic material.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic structural diagram of a battery piece texturing and cleaning device according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The work flow of the texturing cleaning machine of the current battery piece is as follows: the method comprises the steps of material loading automation → rough polishing → first water washing → front washing → wool making → second water washing → rear washing → third water washing → acid washing → fourth water washing → slow lifting → drying groove → material unloading automation. In the wool making process, the battery piece firstly enters a rough polishing tank, then a mechanical damage layer of the battery piece is removed by using a soda solution, the battery piece enters a first water washing tank, alkali liquor remained on the surface of the battery piece is cleaned by using pure water, then the battery piece enters a front cleaning tank, impurities such as organic matters on the surface of the battery piece are cleaned, the battery piece enters a wool making tank, the surface of the battery piece forms a pyramid structure by using the alkali liquor and additives, the battery piece enters a second water washing tank, the alkali liquor and the additives remained on the surface of the battery piece are cleaned by using the pure water, then the battery piece enters a rear cleaning tank, the impurities such as the organic matters on the surface of the battery piece after the wool making are cleaned, the battery piece surface is not subjected to impurity removal again in a third water washing tank, then metal ions on the surface of the battery piece are removed in an acid tank and subjected to deoxidation treatment, and the acid residues on the surface of the battery piece are removed in a fourth water washing tank, and carrying out pre-heating treatment on the cell in the slow pulling process. It should be noted that after the battery plate passes through the acid tank, no residual metal ions are required on the surface, so as to ensure that no residual liquid and no metal ions are left on the surface of the battery plate when the battery plate enters the drying tank. However, since the conventional drying tank is basically made of a metal material, the metal drying tank is corroded in an acid-base environment in the texturing cleaning machine to generate metal ions. Meanwhile, metal ions may also be present in the gas introduced into the drying tank. The metal ions are carried to the surface of the battery piece by hot air in the drying groove, and after the diffusion process, the metal ions are diffused to the inside of the battery piece, so that impurities in the battery piece are increased, the impurity concentration of the position where the metal ions in the battery piece are located is increased, the recombination rate of the battery piece is increased, and the conversion efficiency of the battery piece is reduced.

In order to reduce metal ions in the drying tank. In the industry, protective films made of polyvinylidene fluoride (PVDF) are wrapped on the inner side and the outer side of a groove body of a drying groove, so that direct contact between acid and alkali and the groove body of the drying groove is avoided. However, when other metal parts such as the impeller and the like located inside the body of the drying tub are worn, metal ions are still generated, and metal ions may also exist in the gas introduced into the drying tub, and therefore, the problem cannot be completely solved by the method.

Fig. 1 illustrates a schematic structural diagram of a battery piece texturing and cleaning device according to an embodiment of the present invention. As shown in fig. 1, a device for cleaning battery pieces by etching according to an embodiment of the present invention includes: drying tank 1, air feed structure 2, circulation pipeline 3 and magnetic pipeline 4. The air supply structure 2 is communicated with the drying groove 1 through a magnetic pipeline 4, and the drying groove 1 is communicated with the air supply structure 2 through a circulating pipeline 3.

Because the gas supply structure passes through magnetic pipeline and drying groove intercommunication, consequently, the gas in the gas supply structure must pass through the magnetic pipeline after just can get into the drying groove for metal ion in the gas is adsorbed by the magnetic pipeline almost or whole, and metal ion in the gas in order to guarantee that the gas supply structure supplies the drying groove is as few as possible, promotes the yield and the quality of battery piece. Meanwhile, the circulating pipeline is communicated with the drying groove and the air supply structure and used for guiding out air in the drying groove and continuously supplying the air into the drying groove through the air supply structure, so that the air can be recycled, circulating air is formed in the drying groove, and metal ions in the drying groove can be taken out. Because the gas in the circulating pipeline flows into the gas supply structure finally, flows through the magnetic pipeline together with the gas in the gas supply structure, and then enters the drying groove again. During the process of flowing through the magnetic pipeline, the metal ions in the gas can be adsorbed by the magnetic pipeline. Therefore, in the continuous circulation of the gas in the drying groove, the metal ions in the drying groove are continuously carried out of the drying groove by the gas and are adsorbed by the magnetic pipeline, so that the metal ions hardly exist in the drying groove, and the problem that the metal ions are attached to the surface of the battery piece to cause the reduction of the yield and the quality of the battery piece is avoided.

As shown in fig. 1, the magnetic pipeline 4 is used for adsorbing metal ions in the gas flowing through the magnetic pipeline 4, and therefore the magnetic pipeline 4 may be a pipeline made of a magnetic material, and may include a pipeline body and a magnetic layer formed on an inner wall of the pipeline body, and may also include a pipeline body and a magnetic filter formed in the pipeline body.

For example, when the magnetic pipeline is a pipeline formed by a magnetic material, the magnetic pipeline may be a pipeline made of a neodymium iron boron magnet as a magnetic material to realize the adsorption of metal ions. Of course, the magnetic pipe may be a pipe made of a magnetic material such as a samarium cobalt magnet or an alnico magnet.

For another example, when the magnetic circuit includes a circuit body and a magnetic layer formed on an inner wall of the circuit body, the property of the magnetic circuit to adsorb metal ions is derived from the magnetic layer located on the inner wall of the circuit body. Specifically, the magnetic layer may be a magnetic ring, and in this case, the magnetic pipeline may be a pipeline having the magnetic ring therein. The number of the magnetic rings can be multiple, and the magnetic rings are respectively arranged on the inner wall of the magnetic pipeline along the flowing direction of the gas. Through setting up the metal ion that a plurality of magnet circles can be as much as possible in the adsorbed gas to carry metal ion in avoiding letting in the gas in the stoving groove. Meanwhile, from the viewpoint of cost saving, since metal ions in the gas are less and less along the flow direction of the gas, the heights of the plurality of magnetic rings may be gradually reduced along the flow direction of the gas. Of course, the magnetic layer may be a magnet bar, a magnet block, or the like, but is not limited thereto. The material of the magnetic layer is not limited as long as the material can attract metal ions.

For another example, when the magnetic pipeline includes a pipeline body and a magnetic filter formed in the pipeline body, the property of the magnetic pipeline to adsorb metal ions is derived from the magnetic filter located on the inner wall of the pipeline body. The magnetic filter screen can be made of magnetic materials. Specifically, this magnetism filter screen can be neodymium iron boron magnet filter screen, also can be samarium cobalt magnet filter screen, alnico magnet filter screen etc. and is not limited to this. Along the flowing direction of gas, the magnetic filter screens can be provided with a plurality of magnetic filter screens, and the filtering efficiency of the magnetic filter screens can be gradually increased so as to ensure that metal ions flowing through the magnetic pipeline are fully adsorbed as much as possible and other impurities in the gas flowing through the magnetic pipeline are fully filtered as much as possible, so that the impurity content in the drying groove is ensured to be as low as possible, and the influence on the yield and the quality of the battery piece is reduced. In order to enhance the effect of the magnetic pipeline on adsorbing the metal ions, the pipeline body may be made of a magnetic material.

As shown in fig. 1, since impurities including metal ions may also exist in the workshop environment, when the gas in the workshop environment enters the gas supply structure 2 through the gas inlet of the gas supply structure 2, in order to reduce the influence of the impurities entering the drying slot 1 on the battery cells, the gas supply structure 2 may include a plurality of filter elements 5 distributed along the gas flow direction. Impurity in the fresh air gas that gets into in getting rid of air feed structure 2's the air inlet, and compare in setting up one and filter 5, set up a plurality of and filter 5 and can reduce "the fish of leaking the net", make the filter effect better.

As shown in fig. 1, the filtering efficiency of the plurality of filter members 5 may be gradually increased in the gas flow direction. For example, when the number of the filter members 5 is 3, the 3 filter members 5 may be primary filter members 5 respectively for filtering particles having a particle size larger than 5 μm along the flow direction of the gas, so as to realize primary filtering of the fresh air entering from the air inlet. And the high-medium efficiency filter element 5 is used for filtering particles with the particle size larger than 1 mu m and further filtering the fresh air subjected to primary filtration. The high-efficiency filter piece 5 is used for filtering particles with the particle size larger than 0.5 mu m, further filtering the fresh air passing through the high-efficiency filter piece 5, and removing the particles with the particle size larger than 0.5 mu m in the fresh air. Because the higher the price of filtering piece 5 that filtration efficiency is higher, consequently, through setting up the filtration piece 5 that a plurality of filtration efficiencies increase gradually, filter step by step, can also save the cost when guaranteeing the filter effect. It should be noted that the filtration efficiency of the different filter elements 5 is defined according to the specifications of the national standard GB/T14295-93 "air filter" and GB13554-92 "high efficiency air filter".

Specifically, since the plurality of filter members each include a filter element, the increase in filtration efficiency of the plurality of filter members in the gas flow direction can be reflected in the gradual decrease in the pore diameter of the filter element included in each of the filter members. For example, the pore size of the filter element of the plurality of filter elements in the gas flow direction can be 5 μm, 1 μm, 0.5 μm and the like in sequence, and the specific pore size of the filter element can be selected according to actual conditions. As for the material of the filter element, polypropylene, polytetrafluoroethylene, rattan, glass fiber, stainless sodium, titanium, nickel alloy and the like can be used.

As shown in fig. 1, the at least one filter element 5 may be a magnetic filter element 5 in order to reduce or avoid metal ions being carried in the fresh air entering the air supply structure 2 from the air inlet. At this time, the fresh air entering from the air inlet flows through the magnetic filter member 5, and metal ions carried in the fresh air are adsorbed by the magnetic filter member 5, and then continuously flow through the magnetic pipeline 4 and enter the drying groove 1. The magnetic pipeline 4 is used for secondary screening, so that metal ions are prevented from being brought into the drying groove 1 by gas. Due to the existence of the circulating pipeline 3, even if part of metal ions exist in the drying groove 1, the metal ions are continuously carried out of the drying groove 1 by the circulating air under the action of the circulating air and then are adsorbed by the magnetic pipeline 4. Of course, these filter 5 can also be magnetic filter 5 for the metal ion's that gets into in the new trend in the air feed structure 2 adsorption effect is better, with the assurance to hardly have metal ion in the gas that lets in drying groove 1.

As shown in fig. 1, in order to achieve the effect of adsorbing the metal ions in the fresh air, the at least one filter element 5 may be made of a magnetic material. It should be understood that the magnetic material herein refers to a magnetic material having a property of attracting metal, and for example, the magnetic material may be a metal alloy magnet such as a neodymium-iron-boron magnet, a samarium-cobalt magnet, or an alnico magnet. In practical applications, the filter 5 may be a magnetic filter made of neodymium iron boron magnet.

As another possible implementation manner, as shown in fig. 1, the material of the filter element of the at least one filter element 5 is a magnetic material, so as to ensure that when the fresh air passes through the magnetic filter element, metal ions in the fresh air are adsorbed on the filter element and do not enter the drying groove 1, thereby reducing factors that may cause the defects of the battery piece, and improving the quality of the battery piece.

The novel effect of the present invention will be further described below by way of specific examples and comparative examples.

Example one

The battery piece texturing and cleaning equipment provided by the embodiment of the utility model is used for texturing and cleaning 400 battery pieces in a single groove, and the number of the battery pieces with defects is observed to be 4 after texturing and cleaning.

Example two

The cell slice etching and cleaning equipment provided by the embodiment of the utility model is used for etching and cleaning 1200 cell slices in a single tank, and after etching and cleaning are finished, the number of the cell slices with defects is observed to be 6.

Comparative example 1

The existing unmodified cell piece texturing and cleaning equipment is used for texturing and cleaning 400 cell pieces in a single groove, and after texturing and cleaning are finished, the number of the cell pieces with defects is observed to be 6.

Comparative example No. two

The existing unmodified battery piece texturing and cleaning equipment is used for texturing and cleaning 1200 battery pieces in a single groove, and after texturing and cleaning are finished, the number of the battery pieces with defects is observed to be 12.

From the above, the fraction defective of the battery pieces treated by the battery piece texturing and cleaning device provided by the embodiment of the utility model is reduced by 0.5%. The quality of the battery piece is greatly improved, and the production cost is saved.

In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. The battery piece texturing and cleaning equipment is characterized by comprising a drying groove, an air supply structure, a circulating pipeline and a magnetic pipeline; the air feed structure passes through the magnetism pipeline with the drying groove intercommunication, the drying groove passes through the circulating line with the air feed structure intercommunication, the air feed structure includes along a plurality of filtration pieces that gas flow direction distributes, at least one filtration piece is the magnetism filtration piece.

2. The battery piece texturing and cleaning device according to claim 1, wherein the magnetic pipeline is a pipeline formed by magnetic materials.

3. The battery piece texturing and cleaning device according to claim 1, wherein the magnetic pipeline comprises a pipeline body and a magnetic layer formed on the inner wall of the pipeline body.

4. The battery piece texturing and cleaning device according to claim 1, wherein the magnetic pipeline comprises a pipeline body and a magnetic filter screen formed in the pipeline body.

5. The cell etching cleaning apparatus according to claim 1, wherein the filtering efficiency of the plurality of filter elements is gradually increased in a gas flow direction.

6. The battery plate etching and cleaning device according to claim 1, wherein a plurality of the filter members each include a filter element, and the filter elements each include a filter element having a pore size that gradually decreases in a gas flow direction.

7. The apparatus according to claim 1, wherein at least one of the filter elements is made of a magnetic material.

8. The battery plate etching and cleaning device according to claim 6, wherein the material of the filter element of at least one of the filter elements is a magnetic material.