Special welding strip for solar main-grid-line-free battery piece

Abstract

The utility model provides a special welding strip for a solar cell without a main grid line. According to the welding strip special for the solar main-grid-line-free battery pieces, the positions, close to the two sides, of the top of the welding strip are connected with the tops and the bottoms of the two main-grid-line-free battery pieces respectively, a lower welding strip is contained in the welding strip, two mounting grooves are formed in the top of the lower welding strip, insulating layers are arranged on the inner surfaces of the mounting grooves, and the insulating layers are arranged on the inner surfaces of the mounting grooves. The inner surface of each insulating layer is provided with a stress belt, the two ends of each stress belt are fixedly connected with stress blocks, the top of the lower welding belt is provided with an upper welding belt, and the two sides of the lower welding belt and the two sides of the upper welding belt are provided with bayonets. According to the welding strip special for the solar cell without the main grid line, only the upper welding strip body and the lower welding strip body need to be welded together through the prior art, through the design, the strength of the welding strip can be improved through the stress strip, and the situation that after the welding strip is connected with the cell without the main grid line, a bent part is damaged due to stress can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of busbar-free battery sheet welding strips, in particular to a special welding strip for solar busbar-free battery sheets. Background Art

[0002] Solar energy is a renewable energy source, which refers to the thermal radiation energy of the sun. Its main manifestation is commonly known as sunlight. In modern times, it is generally used to generate electricity or provide energy for water heaters.

[0003] The electricity generated by solar energy is stored through busbarless solar cells, and the busbarless solar cells are assembled. During the welding process of the busbarless solar cells, the welding rods need to be connected to the top and bottom of the two busbarless solar cells respectively.

[0004] The traditional welding ribbon itself is not strong enough to facilitate welding, and the welding method of the busbar-free solar cell will cause a bend in the middle of the welding ribbon. If the bend is subjected to force, it is easy to be damaged, thus affecting the normal use of the busbar-free solar cell.

[0005] Therefore, it is necessary to provide a special welding strip for solar battery cells without main grid lines to solve the above technical problems. Utility Model Content

[0006] The utility model provides a special welding belt for solar battery cells without main grid lines, which solves the problem that after the battery cells without main grid lines are welded with the welding belt, there will be a bending area in the middle of the welding belt, which is easy to be damaged if subjected to force, affecting the normal use of the battery cells without main grid lines.

[0007] In order to solve the above technical problems, the utility model provides a special welding strip for solar busbar-free battery sheet, comprising: a busbar-free battery sheet;

[0008] A welding strip, wherein the top of the welding strip near the two sides is respectively connected to the top and bottom of the two busbar-free solar cells;

[0009] A lower welding strip, the lower welding strip is contained inside the welding strip, two installation grooves are opened on the top of the lower welding strip, the inner surfaces of the installation grooves are provided with insulating layers, the inner surfaces of the insulating layers are provided with force strips, both ends of the force strips are fixedly connected with force blocks, an upper welding strip is provided on the top of the lower welding strip, and both sides of the lower welding strip and the upper welding strip are provided with bayonet sockets.

[0010] The welding strip and the main grid-free battery cell are connected by battery welding. The force-bearing block is inserted into the inside of the slot, and the force-bearing strip is wrapped by an insulating layer.

[0011] Preferably, a lower coating layer is provided at the bottom of the lower welding strip, and an upper coating layer is provided at the top of the upper welding strip.

[0012] The bottom coating and top coating are to prevent the solder strip from oxidation.

[0013] Preferably, the front and back sides of the lower welding strip and the upper welding strip are both provided with side coatings.

[0014] The side coating, the upper coating and the lower coating wrap the outer surface of the soldering ribbon.

[0015] Preferably, the stress-bearing belt may be made of zirconium oxide or silicon nitride, and the stress-bearing block and the stress-bearing belt are welded together.

[0016] Preferably, the busbar-free battery cell comprises a battery cell, and a back motor is arranged at the bottom of the battery cell.

[0017] Preferably, main grid line terminals are arranged at positions near both sides of the top of the battery cell, and fine grid lines are arranged at the middle position of the top of the battery cell.

[0018] Compared with the related art, the solar busbar-free battery cell dedicated welding strip provided by the utility model has the following beneficial effects:

[0019] The utility model provides a special welding strip for solar battery cells without main grid lines. In order to increase the strength of the welding strip at the bending part, the welding strip is first divided into an upper welding strip and a lower welding strip, and mounting grooves are opened at adjacent positions of the upper welding strip and the lower welding strip, and an insulating layer is arranged inside the mounting groove. After that, it is only necessary to insert the stress-bearing strip with stress-bearing blocks into the insulating layer so that it is located inside the mounting groove, and at the same time, the stress-bearing blocks at both ends of the stress-bearing strip are inserted into the inside of the clamping mouth. After that, it is only necessary to weld the upper welding strip and the lower welding strip together through the existing technology. Through this design, the strength of the welding strip can be increased through the stress-bearing strip, and the situation in which the stress-bearing damage of the bending part of the welding strip after connecting the battery cells without main grid lines can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A structural schematic diagram of a preferred embodiment of a special welding strip for solar busbar-free battery cells provided by the utility model;

[0021] Figure 2 A structural schematic diagram of a force-bearing block is provided for the utility model;

[0022] Figure 3 A schematic diagram of the structure of the insulating layer is provided for the utility model;

[0023] Figure 4 Provided for the utility model Figure 3 An enlarged view of point A is shown;

[0024] Figure 5 Provided for the utility model Figure 3 An enlarged view of point B is shown.

[0025] Numbers in the figure: 1. Battery cell without main grid line, 101. Battery cell, 102. Back electrode, 103. Thin grid line, 104. Main grid line end, 2. Solder strip, 201. Lower coating layer, 202. Upper solder strip, 203. Lower solder strip, 204. Upper coating layer, 205. Side coating layer, 206. Stress block, 207. Stress strip, 208. Insulating layer, 209. Mounting groove, 210. Clip. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0027] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 ,in, Figure 1 A structural schematic diagram of a preferred embodiment of a special welding strip for solar busbar-free battery cells provided by the utility model; Figure 2 A structural schematic diagram of a force-bearing block is provided for the utility model; Figure 3 A schematic diagram of the structure of the insulating layer is provided for the utility model; Figure 4 Provided for the utility model Figure 3 An enlarged view of point A is shown; Figure 5 Provided for the utility model Figure 3 The enlarged view of point B is shown. The special welding strip for solar busbar-free battery cell includes: busbar-free battery cell 1;

[0028] A welding strip 2, wherein the top of the welding strip 2 near the two sides is respectively connected to the top and bottom of the two busbar-free solar cells 1;

[0029] The lower welding strip 203 is contained inside the welding strip 2, and two installation grooves 209 are opened on the top of the lower welding strip 203. The inner surfaces of the installation grooves 209 are provided with insulating layers 208, and the inner surfaces of the insulating layers 208 are provided with force strips 207. Both ends of the force strips 207 are fixedly connected with force blocks 206. The top of the lower welding strip 203 is provided with an upper welding strip 202, and both sides of the lower welding strip 203 and the upper welding strip 202 are provided with bayonet 210.

[0030] The welding strip 2 and the main grid-free battery cell 1 are connected by battery welding. The force block 206 is inserted into the inside of the clamp 210. The force strip 207 is wrapped by the insulating layer 208. The contact surfaces of the upper welding strip 202 and the lower welding strip 203 are connected together by existing welding methods.

[0031] A lower coating layer 201 is disposed at the bottom of the lower welding strip 203 , and an upper coating layer 204 is disposed at the top of the upper welding strip 202 .

[0032] The lower coating layer 201 and the upper coating layer 204 are used to prevent the solder strip from being oxidized and can be provided in the form of a coating.

[0033] The front and back sides of the lower welding strip 203 and the upper welding strip 202 are both provided with side coatings 205 .

[0034] The side coating 205 , the upper coating 204 and the lower coating 201 wrap the outer surface of the soldering ribbon 2 .

[0035] The stress-bearing belt 207 may be made of zirconium oxide or silicon nitride, and the stress-bearing block 206 and the stress-bearing belt 207 are welded together.

[0036] The stress-bearing belt 207 has anti-bending properties and a certain toughness.

[0037] The busbar-free battery cell 1 comprises a battery cell 101 , and a back motor 102 is disposed at the bottom of the battery cell 101 .

[0038] The busbar-free cell 1 includes a component structure on a cell 101 .

[0039] Main grid line terminals 104 are disposed at the top of the battery cell 101 near both sides, and a thin grid line 103 is disposed at the middle of the top of the battery cell 101 .

[0040] The working principle of the special welding strip for solar battery without main grid line provided by the utility model is as follows:

[0041] First, the welding strip 2 is divided into an upper welding strip 202 and a lower welding strip 203, and installation grooves 209 are opened at adjacent positions of the upper welding strip 202 and the lower welding strip 203, and an insulating layer 208 is set inside the installation groove 209. Then, it is only necessary to insert the force-bearing strip 207 with the force-bearing block 206 into the insulating layer 208 so that it is located inside the installation groove 209, and at the same time, the force-bearing blocks 206 at both ends of the force-bearing strip 207 are inserted into the inside of the bayonet 210. Then, it is only necessary to weld the upper welding strip 202 and the lower welding strip 203 together using existing technology.

[0042] Compared with the related art, the solar busbar-free battery cell dedicated welding strip provided by the utility model has the following beneficial effects:

[0043] In order to increase the strength of the bending part of the welding strip 2, the welding strip 2 is first divided into an upper welding strip 202 and a lower welding strip 203, and installation grooves 209 are opened at adjacent positions of the upper welding strip 202 and the lower welding strip 203, and an insulating layer 208 is arranged inside the installation groove 209, and then it is only necessary to insert the force-bearing strip 207 with the force-bearing block 206 into the insulating layer 208 so that it is located inside the installation groove 209, and at the same time, the force-bearing blocks 206 at both ends of the force-bearing strip 207 are inserted into the inside of the clamping port 210, and then it is only necessary to weld the upper welding strip 202 and the lower welding strip 203 together through the existing technology. Through this design, the strength of the welding strip 2 can be increased through the force-bearing strip 207, and the situation in which the bending part of the welding strip 2 is damaged by force after connecting the main grid line-free battery cell 1 can be reduced.

[0044] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A special welding strip for solar battery cells without main grid line, characterized in that: include: No main grid cell; A welding strip, wherein the top of the welding strip near the two sides is respectively connected to the top and bottom of the two busbar-free solar cells; A lower welding strip, the lower welding strip is contained inside the welding strip, two installation grooves are opened on the top of the lower welding strip, the inner surfaces of the installation grooves are provided with insulating layers, the inner surfaces of the insulating layers are provided with force strips, both ends of the force strips are fixedly connected with force blocks, an upper welding strip is provided on the top of the lower welding strip, and both sides of the lower welding strip and the upper welding strip are provided with bayonet sockets.

2. The special welding strip for solar busbar-free cells according to claim 1, characterized in that: A lower coating layer is disposed at the bottom of the lower welding strip, and an upper coating layer is disposed at the top of the upper welding strip.

3. The special welding strip for solar busbar-free cells according to claim 1, characterized in that: The front and back sides of the lower welding strip and the upper welding strip are both provided with side coatings.

4. The special welding strip for solar busbar-free cells according to claim 1, characterized in that: The stress-bearing belt may be made of zirconium oxide or silicon nitride, and the stress-bearing block and the stress-bearing belt are welded together.

5. The special welding strip for solar busbar-free cells according to claim 1, characterized in that: The busbar-free battery cell comprises a battery cell, and a back motor is arranged at the bottom of the battery cell.

6. The special welding strip for solar busbar-free cells according to claim 5, characterized in that: Main grid line terminals are arranged at positions near both sides of the top of the battery cell, and thin grid lines are arranged at the middle position of the top of the battery cell.

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