CN-115625418-B - Welding press, welding equipment, battery assembly, welding method and photovoltaic system

Abstract

The application is suitable for the technical field of solar cells, and provides a welding press, welding equipment, a battery assembly, a welding method and a photovoltaic system. The welding press is used for pressing a welding strip arranged on the solar cell, the solar cell comprises an insulating layer and a plurality of welding spots, the insulating layer is provided with a plurality of openings, the welding spots are arranged on the openings, the top of each welding spot is lower than the top of the insulating layer, the welding spots and the insulating layer enclose a groove, the welding press comprises a pressing plate and a filling piece, and the filling piece presses the welding strip positioned above the welding spots into the groove under the condition that the welding press presses the welding strip and the solar cell, so that the welding strip contacts the welding spots. Therefore, the filler presses the welding strip positioned above the welding point into the groove to enable the welding strip to contact the welding point, so that the situation that a gap is formed between the welding strip and the welding point cannot be contacted due to the fact that the top of the welding point is lower than the top of the insulating layer can be avoided, the welding strip and the welding point can be contacted, and poor welding is improved.

Inventors

• DAI WEI
• CHEN GANG

Assignees

• 浙江爱旭太阳能科技有限公司
• 天津爱旭太阳能科技有限公司
• 珠海富山爱旭太阳能科技有限公司
• 广东爱旭科技有限公司

Dates

Publication Date

20260505

Application Date

20220928

Claims (11)

1. 1. The welding press is characterized by comprising a pressing plate and a filling piece, wherein the pressing plate is used for pressing a welding strip arranged on a solar cell, the solar cell comprises an insulating layer and a plurality of welding spots, the insulating layer is provided with a plurality of openings, the welding spots are arranged on the openings, the top of each welding spot is lower than the top of the insulating layer, and the welding spots and the insulating layer enclose a groove; The filling piece comprises a flexible plate arranged on one side of the pressing plate, and the flexible plate can cover all welding spots of the solar cell and all corresponding welding strips; Under the condition that the welding press presses the welding strip and the solar cell, the welding press and the solar cell enclose a closed space, the welding press is provided with a vacuumizing matching part, the vacuumizing matching part is matched with vacuumizing equipment to vacuumize the closed space, the flexible plate deforms after vacuuming of the closed space, the welding strip is pressed into the groove, wherein a plurality of side walls extending from the edge of the pressing plate to one side of the flexible plate are arranged, the flexible plate and the plurality of side walls enclose an accommodating space, and the flexible plate, the plurality of side walls and the solar cell can enclose the closed space.
2. 2. The welding press of claim 1, wherein the platen is a transparent platen and the filler is a transparent filler.
3. 3. The welding press of claim 1, wherein the flexible plate comprises a silicone plate.
4. 4. A welding apparatus comprising the welding press of any one of claims 1-3.
5. 5. A battery assembly characterized in that a welding press as claimed in any one of claims 1-3 is used to press a solder strip placed on a solar cell during welding.
6. 6. A method of welding a battery pack using the welding press of any one of claims 1 to 3, comprising: Providing a plurality of solar cells, wherein each solar cell comprises an insulating layer and a plurality of welding spots, each insulating layer is provided with a plurality of openings, each welding spot is arranged on each opening, the top of each welding spot is lower than the top of each insulating layer, and each welding spot and each insulating layer enclose a groove; placing welding strips on a plurality of solar cells, wherein the welding strips are positioned above the welding spots; pressing the welding strip and the solar cell by using a welding press, wherein the welding press comprises a pressing plate and a filling piece, and the filling piece presses the welding strip into the groove so that the welding strip contacts the welding spot; and welding the welding strip and the welding spot by using a welder.
7. 7. The welding method of a battery pack according to claim 6, wherein the pressing plate is a transparent pressing plate, the filler is a transparent filler, the welder includes a laser, and welding the welding strap and the welding spot with the welder includes: and welding the welding strip and the welding spot by using a laser through the transparent pressing plate and the transparent filling piece.
8. 8. The method of soldering a battery module according to claim 6, wherein the filler includes a flexible board provided on one side of the pressing plate, the solder ribbon and the solar cell are pressed with a soldering press, comprising: sequentially placing the flexible plate and the pressing plate on the welding strip; and deforming the flexible plate, enabling the flexible plate to extend into the groove, and pressing the welding strip positioned above the welding point into the groove to contact the welding point.
9. 9. The method of welding a battery assembly of claim 8, wherein the welding press and the solar cell enclose an enclosed space, deforming the flexible sheet, comprising: And vacuumizing the closed space from the vacuumizing matching part of the welding press by adopting vacuumizing equipment to deform the flexible plate.
10. 10. A battery pack welded by the welding method of the battery pack according to any one of claims 6 to 9.
11. 11. A photovoltaic system comprising the cell assembly of claim 5 or claim 10.

Description

Welding press, welding equipment, battery assembly, welding method and photovoltaic system Technical Field The application belongs to the technical field of solar cells, and particularly relates to a welding press, welding equipment, a battery assembly, a welding method and a photovoltaic system. Background Solar cell power generation is a sustainable clean energy source that uses the photovoltaic effect of semiconductor p-n junctions to convert sunlight into electrical energy. The related art generally uses a solder tape to connect adjacent two solar cells, thereby manufacturing a cell string, and then packages the cell string into a cell assembly. Thus, the service life of the solar cell can be prolonged, and the reliability of the solar cell can be improved. However, the insulating layer of the solar cell is generally higher than the solder joint, so that when the solder strip is placed on the solar cell, the solder strip is suspended above the solder joint by the higher insulating layer and cannot be contacted with the solder joint, and the current welding press block cannot effectively contact the solder strip with the solder joint. Based on this, how to achieve the contact between the solder strip and the solder joint in the condition that the insulating layer is higher than the solder joint becomes a problem to be solved urgently. Disclosure of Invention The application provides a welding press, welding equipment, a battery assembly, a welding method and a photovoltaic system, and aims to solve the problem of how to achieve contact between a welding strip and a welding spot under the condition that an insulating layer is higher than the welding spot. In a first aspect, the welding press provided by the application is used for pressing a welding strip arranged on a solar cell, the solar cell comprises an insulating layer and a plurality of welding spots, the insulating layer is provided with a plurality of openings, the welding spots are arranged on the openings, the top of each welding spot is lower than the top of the insulating layer, the welding spots and the insulating layer enclose a groove, the welding press comprises a pressing plate and a filling piece, and the filling piece presses the welding strip positioned above the welding spots into the groove under the condition that the welding press presses the welding strip and the solar cell, so that the welding strip contacts the welding spots. Optionally, the pressing plate is a transparent pressing plate, and the filling member is a transparent filling member. Optionally, the filling member includes a protrusion protruding from the pressing plate to one side, and the protrusion protrudes into the groove to press the solder ribbon located above the solder joint into the groove to contact the solder joint in the case that the solder ribbon and the solar cell are pressed by the solder press. Optionally, the height of the protrusion is equal to the depth of the groove. Optionally, the filling member includes a flexible board disposed at one side of the pressing plate, and when the welding press presses the solder strip and the solar cell, the flexible board deforms and stretches into the groove, so that the solder strip located above the solder joint is pressed into the groove to contact the solder joint. Optionally, under the condition that the welding press presses the welding strip and the solar cell, the welding press and the solar cell enclose a closed space, the welding press is provided with a vacuumizing matching part, the vacuumizing matching part is matched with a vacuumizing device to vacuumize the closed space, and the flexible board deforms after vacuumization of the closed space, so that the welding strip is pressed into the groove. Optionally, the flexible plate comprises a silicone plate. In a second aspect, the application provides a welding apparatus comprising a welding press of any of the above. In a third aspect, the present application provides a battery assembly for pressing a solder strip disposed on a solar cell during a soldering process using any one of the solder presses described above. In a fourth aspect, the present application provides a welding method for a battery assembly, including: Providing a plurality of solar cells, wherein each solar cell comprises an insulating layer and a plurality of welding spots, each insulating layer is provided with a plurality of openings, each welding spot is arranged on each opening, the top of each welding spot is lower than the top of each insulating layer, and each welding spot and each insulating layer enclose a groove; placing welding strips on a plurality of solar cells, wherein the welding strips are positioned above the welding spots; pressing the welding strip and the solar cell by using a welding press, wherein the welding press comprises a pressing plate and a filling piece, and the filling piece presses the welding strip into the groove so that the welding strip contact