CN111952406A - Battery piece preparation method and battery assembly - Google Patents
Battery piece preparation method and battery assembly Download PDFInfo
- Publication number
- CN111952406A CN111952406A CN201910401098.4A CN201910401098A CN111952406A CN 111952406 A CN111952406 A CN 111952406A CN 201910401098 A CN201910401098 A CN 201910401098A CN 111952406 A CN111952406 A CN 111952406A
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- Prior art keywords
- battery piece
- battery
- amorphous silicon
- type amorphous
- silicon layer
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- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 32
- 238000000576 coating method Methods 0.000 claims abstract description 15
- 239000011247 coating layer Substances 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 69
- 229910021417 amorphous silicon Inorganic materials 0.000 claims description 37
- 238000004519 manufacturing process Methods 0.000 claims description 21
- 239000000758 substrate Substances 0.000 claims description 19
- 238000005520 cutting process Methods 0.000 claims description 16
- 238000005336 cracking Methods 0.000 claims description 3
- 239000007888 film coating Substances 0.000 claims 1
- 238000009501 film coating Methods 0.000 claims 1
- 238000011112 process operation Methods 0.000 abstract description 16
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a battery piece preparation method and a battery assembly. In the preparation method of the battery piece, the scribing process operation is set before all or part of the coating process in the preparation process of the battery piece, so that all or part of the coating layer of the battery piece can be prevented from being damaged by the scribing process, and the performance of the battery piece is further influenced.
Description
Technical Field
The invention relates to the technical field of battery manufacturing, in particular to a battery piece preparation method and a battery assembly.
Background
In order to improve the module power of the solar cell, a splitting technology is introduced at the module end, namely, the cell is split into two or more parts, and then the two or more parts are connected in series or in parallel by using a welding strip. The split cell can reduce the current of the assembly, thereby reducing the loss of series resistance, and in order to facilitate the splitting, the scribing operation needs to be carried out on the cell slice before the splitting. At present, the scribing process operation is usually carried out before the splitting process and after the coating process, and for some structural batteries, the method is easy to damage a transparent conductive oxide film (TCO) produced by the coating process, and for heterojunction batteries, the method is also easy to damage an N-type amorphous silicon layer and a P-type amorphous silicon layer produced by the coating process.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides an improved preparation method of a battery piece.
In order to achieve the purpose, the invention adopts the technical scheme that:
a battery piece preparation method comprises a substrate layer and a coating layer arranged on the substrate layer through a coating process, wherein a scribing process is carried out before all or part of the coating process is carried out on the substrate layer.
Preferably, the coating process includes fabricating an N-type amorphous silicon layer on the front surface of the substrate layer, fabricating a P-type amorphous silicon layer on the back surface of the substrate layer, and fabricating transparent conductive film layers on the N-type amorphous silicon layer and the P-type amorphous silicon layer, respectively.
Further, the scribing process is performed before the transparent conductive film layer is manufactured on the N-type amorphous silicon layer and the P-type amorphous silicon layer.
Further, the scribing process is performed before the N-type amorphous silicon layer and the P-type amorphous silicon layer are manufactured on the substrate layer.
Preferably, a texturing process is performed on the battery piece before the coating process is performed, and the dicing process is performed on the battery piece before the texturing process.
Preferably, the dicing process cuts to a depth of no more than 30%, 50%, 70% or 80% of the thickness of the base layer.
Preferably, the dicing process is performed by a doctor blade, a knife blade, a slicer or a laser beam.
Preferably, when the dicing process is performed, one of four sides of the battery piece is a preset side, the preset side is a side parallel to the natural cracking direction of the battery piece, a cutting groove is formed on the battery piece after the battery piece is cut by the dicing process, and the extending direction of the cutting groove is parallel to the extending direction of the preset side.
Preferably, a plurality of cut battery pieces are formed after the same battery piece is cut, and the width of each cut battery piece is the same.
The invention also provides a battery assembly which comprises a battery piece, wherein the battery piece is a half battery piece manufactured by adopting the battery piece manufacturing method.
The invention also provides a battery assembly, which comprises a battery piece, wherein the battery piece is prepared by adopting the battery piece preparation method, and the battery assembly is a laminated assembly.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: by adopting the preparation method of the battery piece, the scribing process operation is set before all or part of the coating process in the preparation process of the battery piece, so that all or part of the coating layer of the battery piece can be prevented from being damaged by the scribing process, and the performance of the battery piece is further influenced.
Detailed Description
The technical solution of the present invention is further explained below.
The preparation of a heterojunction cell generally comprises the following steps:
(1) manufacturing a base layer;
(2) a texturing process;
(3) coating process;
the coating process specifically comprises the following steps:
a. respectively manufacturing intrinsic amorphous silicon layers on the front side and the back side of the substrate layer;
b. manufacturing an N-type amorphous silicon layer on the intrinsic amorphous silicon layer on the front side of the substrate layer, and manufacturing a P-type amorphous silicon layer on the intrinsic amorphous silicon layer on the back side of the substrate layer;
c. and respectively manufacturing transparent conductive film layers on the N-type amorphous silicon layer and the P-type amorphous silicon layer.
Before the heterojunction cell is split, the scribing process operation is generally carried out, and in the application, the scribing process operation is carried out before all or part of the coating process is carried out on the substrate layer.
Specifically, after the N-type amorphous silicon layer and the P-type amorphous silicon layer in the step b are manufactured, a scribing process operation is performed before the transparent conductive film layer is manufactured on the N-type amorphous silicon layer and the P-type amorphous silicon layer in the step c, so that the transparent conductive film layer of the heterojunction battery can be prevented from being damaged by the scribing process operation, and the conductive performance of the heterojunction battery is further prevented from being influenced.
Of course, after the intrinsic amorphous silicon layers are respectively manufactured on the front side and the back side of the substrate layer in the step a, scribing process operation can be performed before the N-type amorphous silicon layer and the P-type amorphous silicon layer are manufactured on the intrinsic amorphous silicon layer in the step b, so that the transparent conductive film layer of the heterojunction cell can be prevented from being damaged by the scribing process operation, and the N-type amorphous silicon layer and the P-type amorphous silicon layer of the heterojunction cell can be prevented from being damaged by the scribing process operation, so that the performance of the heterojunction cell is influenced.
In addition, after the substrate layer is manufactured, scribing process operation can be carried out on the battery piece before the texturing process is carried out on the substrate layer, so that the N-type amorphous silicon layer, the P-type amorphous silicon layer and the transparent conductive film layer of the heterojunction battery can be prevented from being damaged at the same time, and the performance of the heterojunction battery is further influenced; and when the scribing process operation is carried out on the battery piece before the texturing process is carried out, some damages to the battery piece caused in the scribing process operation can be repaired through the texturing process.
The cutting depth of the cell slice in the scribing process operation is required to be not more than 30%, 50%, 70% or 80% of the thickness of the base layer.
The dicing process operates by cutting the cell pieces with a doctor blade, a knife blade, a slicer, or a laser beam.
When scribing process operation is carried out, a reference is needed when the battery piece is cut, in the embodiment, the reference adopted during cutting is the preset edge of the battery piece, specifically, the preset edge of the battery piece is one of four edges, and the preset edge is an edge parallel to the natural cracking direction of the battery piece, namely the preset edge is parallel to the main line-cutting direction on the battery piece. According to the reference, a cutting groove is formed on the battery piece after cutting by a dicing process, and the extending direction of the cutting groove is parallel to the extending direction of the preset edge.
And cutting the same battery piece through scribing process operation to form a plurality of cut battery pieces, wherein the widths of the cut battery pieces are the same.
The invention also provides a battery assembly which comprises a battery piece, wherein the battery piece is a half battery piece manufactured by the battery piece manufacturing method, and the half battery piece is obtained by cutting the whole battery piece into two parts in the direction parallel to the main cutting line on the battery piece.
The invention also provides another battery pack which comprises battery plates, wherein the battery plates are also prepared by the battery plate preparation method, and the battery pack is a laminated assembly.
The above-mentioned embodiments are merely illustrative of the technical idea and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the scope of the present invention.
Claims (11)
1. A preparation method of a battery piece comprises a substrate layer and a coating layer arranged on the substrate layer through a coating process, and is characterized in that: and carrying out a scribing process before all or part of the coating process is carried out on the substrate layer.
2. The method for producing a battery piece according to claim 1, characterized in that: the coating process comprises the steps of manufacturing an N-type amorphous silicon layer on the front surface of the substrate layer, manufacturing a P-type amorphous silicon layer on the back surface of the substrate layer, and manufacturing transparent conductive film layers on the N-type amorphous silicon layer and the P-type amorphous silicon layer respectively.
3. The method for producing a battery piece according to claim 2, characterized in that: and carrying out the scribing process before the transparent conductive film layer is manufactured on the N-type amorphous silicon layer and the P-type amorphous silicon layer.
4. The method for producing a battery piece according to claim 2, characterized in that: and carrying out the scribing process before the N-type amorphous silicon layer and the P-type amorphous silicon layer are manufactured on the substrate layer.
5. The method for producing a battery piece according to claim 1, characterized in that: and performing a texturing process before the film coating process is performed on the battery piece, and performing the scribing process on the battery piece before the texturing process.
6. The method for producing a battery piece according to claim 1, characterized in that: the dicing process cuts to a depth of no more than 30%, 50%, 70%, or 80% of the thickness of the base layer.
7. The method for producing a battery piece according to claim 1, characterized in that: in the scribing process, cutting is performed by a scraper, a blade, a slicer or a laser beam.
8. The method for producing a battery piece according to claim 1, characterized in that: when the scribing process is carried out, one of the four sides of the battery piece is a preset side, the preset side is a side parallel to the natural cracking direction of the battery piece, a cutting groove is formed on the battery piece after the battery piece is cut by the scribing process, and the extending direction of the cutting groove is parallel to the extending direction of the preset side.
9. The method for producing a battery piece according to claim 1, characterized in that: and cutting the same battery piece to form a plurality of cut battery pieces, wherein the width of each cut battery piece is the same.
10. A battery assembly, characterized by: the battery pack comprises a battery piece, wherein the battery piece is a half-piece battery piece manufactured by the battery piece manufacturing method of any one of claims 1-9.
11. A battery assembly, characterized by: the battery pack comprises a battery piece, wherein the battery piece is manufactured by the battery piece manufacturing method of any one of claims 1-9, and the battery pack is a laminated assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910401098.4A CN111952406A (en) | 2019-05-15 | 2019-05-15 | Battery piece preparation method and battery assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910401098.4A CN111952406A (en) | 2019-05-15 | 2019-05-15 | Battery piece preparation method and battery assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111952406A true CN111952406A (en) | 2020-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910401098.4A Pending CN111952406A (en) | 2019-05-15 | 2019-05-15 | Battery piece preparation method and battery assembly |
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| Country | Link |
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| CN (1) | CN111952406A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113036002A (en) * | 2021-03-04 | 2021-06-25 | 苏州联诺太阳能科技有限公司 | Solar cell preparation method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4697041A (en) * | 1985-02-15 | 1987-09-29 | Teijin Limited | Integrated solar cells |
| CN104201240A (en) * | 2014-08-29 | 2014-12-10 | 四川钟顺太阳能开发有限公司 | Production process for solar cell, and solar cell produced by same |
| CN105895745A (en) * | 2016-06-21 | 2016-08-24 | 苏州协鑫集成科技工业应用研究院有限公司 | Method for cutting heterojunction solar cell |
| CN106489211A (en) * | 2014-05-27 | 2017-03-08 | 太阳能公司 | Imbrication formula solar module |
-
2019
- 2019-05-15 CN CN201910401098.4A patent/CN111952406A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4697041A (en) * | 1985-02-15 | 1987-09-29 | Teijin Limited | Integrated solar cells |
| CN106489211A (en) * | 2014-05-27 | 2017-03-08 | 太阳能公司 | Imbrication formula solar module |
| CN104201240A (en) * | 2014-08-29 | 2014-12-10 | 四川钟顺太阳能开发有限公司 | Production process for solar cell, and solar cell produced by same |
| CN105895745A (en) * | 2016-06-21 | 2016-08-24 | 苏州协鑫集成科技工业应用研究院有限公司 | Method for cutting heterojunction solar cell |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113036002A (en) * | 2021-03-04 | 2021-06-25 | 苏州联诺太阳能科技有限公司 | Solar cell preparation method |
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