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CN-224218747-U - Welding strip structure and BC battery

CN224218747UCN 224218747 UCN224218747 UCN 224218747UCN-224218747-U

Abstract

The utility model discloses a welding strip structure which comprises a welding strip main body, wherein a plurality of protrusions used for directly contacting welding PAD points of a BC battery are arranged on the welding strip main body, and the protrusions are distributed at intervals along the length direction of the welding strip main body. The utility model also discloses a BC battery and a battery main body, wherein the protrusions of the welding strip structure are directly welded and fixed with the welding PAD points of the battery main body. The solder strip structure provided by the utility model is applied to the BC battery, so that the solder paste printing and the solder paste drying process can be omitted in the process of the BC battery, the production cost is effectively reduced, and meanwhile, the production line space is saved.

Inventors

  • LIU SONGTAO
  • ZHOU YUANBIN
  • JIANG XIAOSHAN

Assignees

  • 天合光能股份有限公司

Dates

Publication Date
20260508
Application Date
20250422

Claims (8)

  1. 1. The welding strip structure is characterized by comprising a welding strip main body; the welding strip main body is provided with a bulge for contacting a welding PAD point of the battery; The protrusions are distributed at intervals along the length direction of the welding strip main body.
  2. 2. The solder strip structure of claim 1, wherein said solder strip body is compressively expanded to form said projection, said projection including a sidewall enclosure; The side wall surrounds one end and connects the welding strip main part, and the side wall surrounds the other end and has the closed end that is used for contacting battery welding PAD point.
  3. 3. The solder strip structure of claim 1 or 2, wherein the protrusion is one of a cube, a cylinder, an elliptic cylinder, a truncated cone, and a frustum.
  4. 4. The solder strip structure of claim 1, wherein the bump has a thickness of 20-100 μm.
  5. 5. A BC battery comprising the solder strip structure of any one of claims 1-4, and a battery body; and the protrusions of the welding strip structure are directly welded and fixed with the welding PAD points of the battery body.
  6. 6. The BC battery of claim 5, further comprising an insulating gel; The insulating glue is arranged on two sides of the welding PAD point of the battery main body; the welding strip main body of the welding strip structure is erected on the insulating adhesive.
  7. 7. The BC battery of claim 6, wherein said insulating paste has a thickness of 20-100 μm.
  8. 8. The BC battery of claim 6, wherein said solder strip structured protrusions have a gap with said insulating glue.

Description

Welding strip structure and BC battery Technical Field The utility model relates to the technical field of energy storage batteries, in particular to a welding strip structure and a BC battery. Background BC cells (back contact cells) are very prone to short circuits because the positive and negative electrodes are on the back and are cross-distributed, and in order to prevent short circuits, a layer of insulating glue needs to be applied to the positive and negative electrodes. In the prior art, the welding strip is generally of a simple strip-shaped structure, and in the welding process of the welding strip, as the welding strip is placed on the insulating adhesive, a height difference exists between the welding strip and the PAD point, so that the welding strip cannot contact the PAD point, and the welding strip cannot weld the PAD point. To improve this problem, it is currently common to print a solder paste 4a on the PAD spot 21a of the battery body 2a of the BC battery, so that the solder paste 4a can contact the PAD 1a, and the solder paste 4a is also in contact with the PAD spot 21a, ensuring that the PAD 1a can be soldered to the PAD spot 21a during soldering, as shown in fig. 1. The solution is to add related solder paste printing equipment and drying equipment, and the cost is high and the space of the production line is large. Based on this, the present utility model proposes a solder strip structure and a BC battery to solve the above-mentioned problems. Disclosure of utility model The utility model aims to provide a welding strip structure and a BC battery, which can reduce the cost and the occupied space of a production line. In order to solve the technical problems, the utility model provides a welding strip structure, which comprises a welding strip main body; the welding strip main body is provided with a bulge for contacting a welding PAD point of the battery; The protrusions are distributed at intervals along the length direction of the welding strip main body. Further, the solder strip body is pressed and extended to form the bulge, and the bulge comprises a side wall surrounding; The side wall surrounds one end and connects the welding strip main part, and the side wall surrounds the other end and has the closed end that is used for contacting battery welding PAD point. Further, the bulge is one of a cube, a cylinder, an elliptic cylinder, a round table and a frustum. Further, the thickness of the protrusions is 20-100 μm. The utility model also provides a BC battery, which comprises the welding strip structure and a battery main body; and the protrusions of the welding strip structure are directly welded and fixed with the welding PAD points of the battery body. Further, the BC battery further comprises insulating glue; The insulating glue is arranged on two sides of the welding PAD point of the battery main body; the welding strip main body of the welding strip structure is erected on the insulating adhesive. Further, the thickness of the insulating glue is 20-100 mu m. Further, a gap is formed between the protrusion of the welding strip structure and the insulating adhesive. Compared with the prior art, the utility model has at least the following beneficial effects: the solder strip structure provided by the utility model is applied to the BC battery, so that the solder paste printing and the solder paste drying process can be omitted in the process of the BC battery, the production cost is effectively reduced, and meanwhile, the production line space is saved. Drawings FIG. 1 is a schematic diagram of a prior art BC battery printed with solder paste; FIG. 2 is a schematic diagram of a solder strip structure according to a first embodiment of the present utility model; FIG. 3 is a schematic view of a stamping device for processing a solder strip structure according to a first embodiment of the present utility model; fig. 4 is a schematic diagram of a BC battery in a second embodiment of the present utility model. Detailed Description The solder strip structure and BC battery of the present utility model will be described in more detail below in conjunction with the schematic drawings, wherein preferred embodiments of the present utility model are shown, it being understood that one skilled in the art could modify the utility model described herein while still achieving the advantageous effects of the utility model. Accordingly, the following description is to be construed as broadly known to those skilled in the art and not as limiting the utility model. The utility model is more particularly described by way of example in the following paragraphs with reference to the drawings. The advantages and features of the present utility model will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the util