Back film trepanning knife capable of reducing bubbles of lead-out hole

Abstract

The utility model relates to a back film trepanning knife capable of reducing extraction hole bubbles, which comprises a knife body, the knife body comprises two main knives, a plurality of side knives are uniformly arranged on one sides of the two main knives, and the planes of the two ends of the main knives are coplanar with the planes of one sides of the corresponding side knives. The utility model relates to the technical field of back film trepanning knives. The utility model has the effects that the back film is provided with holes, the size is accurate, the cutting glue amount of the lead-out hole can be reduced to the greatest extent, a cushion block is not needed, the extra cost of the glue film is saved, and the cost expenditure of manpower and equipment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of back film hole-opening knives, in particular to a back film hole-opening knife capable of reducing bubbles in lead-out holes. Background Art

[0002] As a clean energy, photovoltaic power generation is favored by countries around the world.

[0003] Bubbles are the most common defective phenomenon of components, and their types are diverse, among which lead-out hole bubbles are more prominent. Lead-out hole bubbles are mainly caused by the need to open holes in the back film of the component so that the lead wire can easily lead out the current.

[0004] There are many ways to make holes, such as circular or rectangular holes, pig nose holes, shutter holes, etc. Circular or rectangular holes lead to the most glue shortage and are prone to bubbles in the lead-out holes, which need to be improved by padding with glue. However, after padding with glue, the battery cell at the lead-out hole position is prone to fragmentation. Once the battery is broken, it is 100% degraded. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a back film hole opening knife for reducing bubbles in the lead-out holes, which has the effect of making holes in the back film with precise dimensions and minimizing the amount of glue cut in the lead-out holes. At the same time, no pads are required, thus saving additional costs for the film and reducing labor and equipment costs.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A back film hole opening knife for reducing bubbles in lead-out holes comprises a knife body, wherein the knife body comprises two main knives, a plurality of side knives are evenly arranged on one side of the two main knives, and the planes where the two ends of the main knives are located are coplanar with the planes where the corresponding side knives are located.

[0008] In a preferred example, the present invention can be further configured as follows: the number of the side cutters is 2 to 4.

[0009] In a preferred example, the utility model can be further configured as follows: a first spacing is formed between the two main knives, a second spacing is formed between the two lead wires in the component, the first spacing is slightly smaller than the second spacing, and the difference between the second spacing and the first spacing is 1 mm to 1.5 mm.

[0010] In a preferred example, the utility model can be further configured as follows: a plurality of the side cutters are perpendicular to the corresponding main cutters.

[0011] In a preferred example, the utility model can be further configured as follows: the length of each side knife is 5 mm to 8 mm.

[0012] In summary, the present invention includes at least one of the following beneficial technical effects:

[0013] 1. By setting multiple side knives on one side of the main knife, the back film can be opened with precise size, which can minimize the amount of glue cut at the lead-out hole and meet the use of films with different fluidity. At the same time, there is no need to use pads, saving additional film costs and reducing labor and equipment costs.

[0014] 2. The opening structure is simple, the production cost is simple, and the maintenance is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 2 is a schematic diagram of the top structure of this embodiment.

[0016] In the figure, 1, knife body; 11, main knife; 12, side knife. DETAILED DESCRIPTION

[0017] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0018] Example:

[0019] Reference Figure 1 The utility model discloses a back film hole cutting knife for reducing the bubbles in the lead-out hole, comprising a knife body, wherein the knife body comprises two main knives. The length of the main knife is greater than the width of the busbar, which is 6 mm in this embodiment. In this embodiment, the length of the main knife is 7 mm and the width is 1 mm.

[0020] The two main cutters are placed symmetrically. The distance between the two main cutters is adjusted by a movable bayonet. A first spacing is formed between the two main cutters 11, and a second spacing is formed between the two lead wires in the assembly. The first spacing is slightly smaller than the second spacing, and the difference between the second spacing and the first spacing is 1 mm to 1.5 mm. The main cutter cuts the film into a rectangular opening, the length of which is greater than the width of the busbar to ensure that the lead wire can pass through.

[0021] A plurality of side knives are evenly arranged on one side of the two main knives. The number of side knives is 2 to 4. In this embodiment, the number of side knives is four. One side of the side knives at both ends of the main knife is flush with the corresponding side of the main knife. The plurality of side knives are perpendicular to the corresponding main knife.

[0022] The length of each side cutter is 5 mm to 8 mm. In this embodiment, the length of the side cutter is 6 mm. The side cutter cuts the film on one side of the lead-out wire into strips, which can move freely and facilitate the lead-out wire to fall into the hole.

[0023] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A back film hole-opening knife for reducing bubbles in the lead-out holes, comprising a knife body (1), characterized in that: The knife body (1) comprises two main knives (11), one side of each of the two main knives (11) being evenly provided with a plurality of side knives (12), and the planes where the two ends of the main knives (11) are located are coplanar with the planes where the corresponding side knives (12) are located.

2. A back film hole opening knife for reducing bubbles in the lead-out hole according to claim 1, characterized in that: The number of the side cutters (12) is 2 to 4.

3. A back film hole opening knife for reducing bubbles in the lead-out hole according to claim 2, characterized in that: A first spacing is formed between the two main blades (11), and a second spacing is formed between the two lead wires in the component. The first spacing is slightly smaller than the second spacing, and the difference between the second spacing and the first spacing is 1 mm to 1.5 mm.

4. A back film hole opening knife for reducing bubbles in the lead-out hole according to claim 3, characterized in that: A plurality of the side knives (12) are perpendicular to the corresponding main knives (11).

5. A back film hole-opening knife for reducing bubbles in the lead-out holes according to claim 4, characterized in that: The length of each side knife (12) is 5 mm to 8 mm.

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