Solder strip structure and BC battery

Abstract

The utility model discloses a solder strip structure which comprises a solder strip body. The welding strip body is provided with a protrusion used for being in direct contact with a BC battery welding PAD point. The multiple protrusions are distributed in the length direction of the welding strip body at intervals. The utility model also discloses a BC battery and a battery main body. And the bulge of the welding strip structure is directly welded and fixed with the welding PAD point 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 solder paste drying processes can be canceled in the BC battery manufacturing process, the production cost is effectively reduced, and the production line space is saved at the same time.

Description

Technical Field

[0001] This utility model relates to the field of energy storage battery technology, and in particular to a welding strip structure and a BC battery. Background Technology

[0002] BC batteries (back contact batteries) are prone to short circuits because the positive and negative electrodes are located on the back and are cross-distributed. To prevent short circuits, an insulating adhesive layer needs to be applied to the positive and negative electrodes. Existing solder strips are typically simple, elongated structures. During the soldering process, because the solder strip is placed on the insulating adhesive, there is a height difference between the solder strip and the PAD (pad) point, causing the solder strip to fail to make contact with the PAD point and thus preventing the solder strip from successfully soldering to the PAD point.

[0003] To improve this problem, the current common solution is to print solder paste 4a on the PAD point 21a of the battery body 2a of the BC battery, so that the solder paste 4a can contact the solder ribbon 1a, and the solder paste 4a is also in contact with the PAD point 21a, ensuring that the solder ribbon 1a can be soldered to the PAD point 21a during soldering. Figure 1 As shown.

[0004] The above solution requires the addition of related solder paste printing and drying equipment, which is costly and occupies a large production line space.

[0005] Based on this, the present invention proposes a welding strip structure and a BC battery to solve the problems mentioned above. Utility Model Content

[0006] The purpose of this invention is to provide a welding strip structure and BC battery to reduce costs and production line space requirements.

[0007] To solve the above-mentioned technical problems, this utility model provides a welding strip structure, including a welding strip body;

[0008] The welding strip body is provided with protrusions for contacting the battery welding PAD points;

[0009] The protrusions are multiple, and the multiple protrusions are distributed at intervals along the length direction of the weld strip body.

[0010] Furthermore, the welding strip body is compressed and stretched to form the protrusion, the protrusion being surrounded by sidewalls;

[0011] The sidewall surrounds one end connected to the welding strip body, and the other end of the sidewall surrounds a closed end for contacting the battery welding PAD point.

[0012] Furthermore, the protrusion is one of a cube, cylinder, elliptical cylinder, frustum, and truncated cone.

[0013] Furthermore, the thickness of the protrusion is 20-100 μm.

[0014] This utility model also provides a BC battery, including the above-described solder strip structure and a battery body;

[0015] The protrusions of the welding strip structure are directly welded and fixed to the welding PAD points of the battery body.

[0016] Furthermore, BC batteries also include insulating adhesive;

[0017] The insulating adhesive is provided on both sides of the welding PAD point of the battery body;

[0018] The main body of the welding strip structure is laid on the insulating adhesive.

[0019] Furthermore, the thickness of the insulating adhesive is 20-100 μm.

[0020] Furthermore, there is a gap between the protrusions of the solder strip structure and the insulating adhesive.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects:

[0022] The solder ribbon structure provided by this utility model can be applied to BC batteries, which can eliminate the solder paste printing and solder paste drying processes in the manufacturing process of BC batteries, effectively reducing production costs and saving production line space. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a BC battery using solder paste printing in the prior art;

[0024] Figure 2 This is a schematic diagram of the welding strip structure in Embodiment 1 of this utility model;

[0025] Figure 3 This is a schematic diagram of the stamping device for processing the welding strip structure in Embodiment 1 of this utility model;

[0026] Figure 4 This is a schematic diagram of the BC battery in Embodiment 2 of this utility model. Detailed Implementation

[0027] The following detailed description of the solder strip structure and BC battery of this utility model, with reference to the schematic diagrams, illustrates preferred embodiments of the utility model. It should be understood that those skilled in the art can modify the utility model described herein while still achieving its advantageous effects. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the utility model.

[0028] The present invention will be described in more detail below by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0029] Example 1

[0030] like Figure 2 As shown in the figure, this utility model embodiment proposes a welding strip structure, including a welding strip body 1, on which protrusions 11 are provided. There are multiple protrusions 11, and the multiple protrusions 11 are distributed at intervals along the length direction of the welding strip body 1.

[0031] Existing solder ribbons have a long, strip-shaped structure. In this embodiment, the existing solder ribbon is improved by providing protrusions 11 on the main body 1. Due to the protrusions 11, during the installation of the solder ribbon structure, the protrusions directly contact the solder pads of the battery, leaving a certain gap between the main body 1 and the battery. This gap can serve as space for the installation of insulating adhesive. Therefore, the use of solder paste can be eliminated, i.e., the solder paste printing and drying processes are eliminated. This not only saves on equipment costs, but also reduces labor and electricity costs to a certain extent, and relatively reduces the space required for the production line.

[0032] In the above embodiment, the welding strip body 1 is stretched under pressure to form the protrusion 11, the protrusion 11 includes a sidewall surrounding 111; one end of the sidewall surrounding 11 is connected to the welding strip body 1, and the other end of the sidewall surrounding 111 has a closed end 112 for contacting the battery welding PAD point.

[0033] The protrusion 11 is one of a cube, cylinder, elliptical cylinder, frustum, and truncated cone, ensuring an effective contact area between the protrusion 11 and the welding PAD point of the battery, and ensuring the welding fixation effect of the welding strip structure.

[0034] Specifically, in the above implementation process, the solder strip structure can be adopted as follows: Figure 3 The stamping device shown is used for processing. The stamping device includes an upper die 6 and a lower die 5. Pressure blocks 61 are arranged at intervals on the upper die 6, and grooves 51 that cooperate with the pressure blocks 61 are opened on the lower die 5. During processing, the welding strip 1a is placed on the lower die 5, and the upper die 6 and the lower die 5 are driven by the driving mechanism to close, so that a protrusion is formed on the welding strip 1a, thereby realizing the processing of the welding strip structure in this embodiment.

[0035] In a preferred embodiment, the thickness of the protrusion 11 is 20-100 μm.

[0036] For BC batteries, to ensure good insulation, insulating adhesive is usually applied to both sides of the welding PAD point of the BC battery. The thickness of the insulating adhesive is generally designed to be between 20-100μm. By setting the thickness of the protrusion 11 to 20-100μm, it is ensured that the protrusion 11 can directly contact the welding PAD point of the BC battery during installation.

[0037] In summary, the solder ribbon structure provided in this embodiment, when applied to BC batteries, eliminates the solder paste printing and solder paste drying processes in the BC battery manufacturing process, effectively reducing production costs and saving production line space.

[0038] Example 2

[0039] This embodiment provides a BC battery, in conjunction with reference to... Figure 4 The battery body 2 includes the welding strip structure provided in Embodiment 1, and the protrusion 11 of the welding strip structure is directly welded and fixed to the welding PAD point 21 of the battery body 2.

[0040] In the above embodiment, the protrusion 11 in the solder strip structure is directly soldered and fixed to the solder PAD point 21 of the battery body 2, eliminating the use of solder paste. This eliminates the solder paste printing and solder paste drying processes in the BC battery manufacturing process, effectively reducing production costs and saving production line space.

[0041] In a preferred embodiment, the BC battery further includes insulating adhesive 3, which is provided on both sides of the welding PAD point 21 of the battery body 2, and the welding strip body 1 of the welding strip structure is laid on the insulating adhesive 3.

[0042] The insulating adhesive 3 is mainly used to isolate different electrodes in the battery body 2, prevent short circuits between electrodes, and ensure normal battery operation. At the same time, the insulating adhesive can provide some support for the welding ribbon body 1 and improve the stability of the welding ribbon body 1 during installation.

[0043] Preferably, the thickness of the insulating adhesive 3 is 20-100μm, which provides good insulation for the BC battery and reduces the risk of short circuit.

[0044] In the preferred embodiment described above, there is a gap between the protrusion 11 of the welding strip structure and the insulating adhesive 3 to avoid interference of the insulating adhesive 3 with the installation of the welding strip structure.

[0045] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A welding strip structure, characterized in that, Including the main body of the welding strip; The welding strip body is provided with protrusions for contacting the battery welding PAD points; The protrusions are multiple, and the multiple protrusions are distributed at intervals along the length direction of the weld strip body.

2. The welding strip structure as described in claim 1, characterized in that, The welding strip body is stretched under pressure to form the protrusion, and the protrusion is surrounded by sidewalls; The sidewall surrounds one end connected to the welding strip body, and the other end of the sidewall surrounds a closed end for contacting the battery welding PAD point.

3. The welding strip structure as described in claim 1 or 2, characterized in that, The protrusion is one of a cube, cylinder, elliptical cylinder, frustum, and cone.

4. The welding strip structure as described in claim 1, characterized in that, The thickness of the protrusion is 20-100 μm.

5. A BC battery, characterized in that, Includes the solder strip structure as described in any one of claims 1-4, and the battery body; The protrusions of the welding strip structure are directly welded and fixed to the welding PAD points of the battery body.

6. The BC battery as described in claim 5, characterized in that, It also includes insulating adhesive; The insulating adhesive is provided on both sides of the welding PAD point of the battery body; The main body of the welding strip structure is laid on the insulating adhesive.

7. The BC battery as described in claim 6, characterized in that, The thickness of the insulating adhesive is 20-100 μm.

8. The BC battery as described in claim 6, characterized in that, There is a gap between the protrusions of the welding strip structure and the insulating adhesive.

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