A battery sheet for a laminated assembly

Abstract

The utility model discloses a kind of battery piece for lamination assembly, including at least two battery piece bodies, between adjacent two battery piece bodies are welded by several solder strips, adjacent two battery piece bodies have overlapping area, the opposite surface of the overlapping area of two battery piece bodies is respectively provided with the buffer rubber strip for clamping solder strip.The utility model is respectively provided with the buffer rubber strip for clamping solder strip on the opposite surface of the overlapping area of two battery piece bodies, solder strip is clamped by the buffer rubber strip arranged up and down, completely avoid the risk of hidden crack caused by solder strip and battery piece body contact when laminating.

Description

Technical Field

[0001] This utility model belongs to the field of battery cell technology, specifically relating to a battery cell for stacked assembly. Background Technology

[0002] Photovoltaic modules typically consist of a front-mounted structure, a back-mounted structure, and a cell array. Because the laminated structure allows adjacent cells to be tightly connected, reducing the gaps between cells and effectively increasing the power output per unit area, laminated cell arrays are widely used in photovoltaic modules.

[0003] To prevent microcracks from occurring during the lamination process of stacked modules due to rigid contact between the cells and the solder ribbon, an adhesive film is usually inserted between the cells and the solder ribbon to isolate the solder ribbon and the cells.

[0004] Currently, the traditional method involves placing adhesive film plugs on both sides of the solder strip during the stringing of solar cells. This method requires upgrading existing equipment or using entirely new stringing equipment, which is not only complex but also increases costs. In addition, placing the adhesive film on both sides of the solder strip still poses a risk of microcracks during lamination. Utility Model Content

[0005] The purpose of this invention is to provide a solar cell for stacked modules, thereby solving the problems mentioned in the background section. The solar cell for stacked modules provided by this invention features a simple manufacturing process and requires no upgrades to existing equipment.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a battery cell for a stacked assembly, comprising at least two battery cell bodies, adjacent battery cell bodies being welded together by a plurality of welding strips, an overlapping area between adjacent battery cell bodies, and buffer strips for clamping the welding strips being provided on the opposite surfaces of the overlapping areas of the two battery cell bodies.

[0007] Furthermore, in this invention, the shape of the buffer strip is rectangular, rhomboid, or elliptical.

[0008] In order to make the process simpler by printing the buffer strip after the battery cell body is produced using existing silver paste printing equipment, without upgrading the existing stringing equipment, the buffer strip is further formed by printing.

[0009] Furthermore, in this invention, the buffer strip is made of UV adhesive or thermosetting adhesive.

[0010] Furthermore, in this invention, the thickness of the buffer strip is 0.05mm-0.3mm, and the width of the buffer strip is less than 2mm.

[0011] Furthermore, in this invention, the length of the buffer strip is less than the width of the battery cell body.

[0012] To save on the cost of the buffer strip and to allow for gaps in the overlapping area, the adhesive film melts during lamination and fills these gaps, providing some support. Furthermore, the buffer strip comprises several strip segments, each corresponding to the main grid of the solar cell. The length of each strip segment is greater than 1 mm.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model provides buffer strips for clamping the welding strip on the opposite surfaces of the overlapping areas of the two battery cell bodies. The welding strip is clamped by the buffer strips arranged above and below, which completely avoids the risk of microcracks caused by the welding strip contacting the battery cell body during lamination.

[0015] 2. The buffer strip of this utility model is formed by printing. It can be printed on the buffer strip after the battery cell body is produced using existing silver paste printing equipment. The process is simpler and there is no need to upgrade the existing stringing equipment.

[0016] 3. This utility model sets the buffer strip into several strip segments, which can save the cost of the buffer strip on the one hand, and create gaps in the overlapping area on the other hand. When the film melts during lamination, it can fill the gaps and play a certain supporting role. Attached Figure Description

[0017] Figure 1 This is an exploded view of the structure of this utility model.

[0018] Figure 2 This is a side view of the structure of this utility model.

[0019] Figure 3 This is a side view of the structure in Embodiment 2 of this utility model.

[0020] Figure 4 This is a schematic diagram showing the distribution of the buffer strips when the battery cells need to be cut and then stacked according to this utility model.

[0021] In the diagram: 1. Battery cell body; 2. Buffer strip; 3. Welding strip. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1

[0024] Please see Figures 1-2 The present invention provides the following technical solution: a battery cell for a stacked module, comprising at least two battery cell bodies 1, adjacent battery cell bodies 1 being welded together by a plurality of welding strips 3, and an overlapping area between adjacent battery cell bodies 1, wherein buffer strips 2 for clamping the welding strips 3 are respectively provided on the opposite surfaces of the overlapping area of ​​the two battery cell bodies 1, the buffer strips 2 being made of UV adhesive or thermosetting adhesive, preferably UV adhesive in this embodiment, the shape of the buffer strips 2 being rectangular, rhomboid or elliptical, preferably rectangular in this embodiment, the thickness of the buffer strips 2 being 0.1mm, the width of the buffer strips 2 being 1.5mm, and the length of the buffer strips 2 being less than the width of the battery cell body 1.

[0025] By adopting the above technical solution, this utility model provides buffer strips 2 for clamping the welding strip 3 on the opposite surfaces of the overlapping areas of the two battery cell bodies 1. The welding strip 3 is clamped by the buffer strips 2 arranged vertically, which completely avoids the risk of microcracks caused by the welding strip 3 contacting the battery cell body 1 during lamination.

[0026] Specifically, the cushioning strip 2 is formed by printing.

[0027] By adopting the above technical solution, the buffer strip 2 can be printed using existing silver paste printing equipment after the battery cell body 1 is produced. The process is simpler and there is no need to upgrade or modify the existing stringing equipment.

[0028] Example 2

[0029] Please see Figure 3 The difference between this embodiment and Embodiment 1 is that, specifically, the buffer strip 2 includes several strip segments, which are arranged corresponding to the main grid of the battery cell body 1. The length of each strip segment is 1.5 mm.

[0030] By adopting the above technical solution, the buffer strip 2 is set into several strip segments. On the one hand, the cost of the buffer strip 2 can be saved, and on the other hand, gaps exist in the overlapping area. During lamination, the melted adhesive film can fill the gaps and play a certain supporting role.

[0031] Example 3

[0032] Please see Figure 4 For cases where the battery cell body 1 needs to be cut before stacking, the printing position of the buffer strip 2 needs to reserve space for cutting.

[0033] In summary, this invention provides buffer strips 2 on the opposite surfaces of the overlapping areas of the two battery cell bodies 1 to clamp the solder ribbon 3. By clamping the solder ribbon 3 with the buffer strips 2 arranged vertically, the risk of microcracks caused by contact between the solder ribbon 3 and the battery cell body 1 during lamination is completely avoided. The buffer strips 2 of this invention are printed, allowing existing silver paste printing equipment to be used after the battery cell body 1 is produced, simplifying the process and eliminating the need to upgrade existing stringing equipment. This invention sets the buffer strips 2 into several segments, saving cost and creating gaps in the overlapping area. During lamination, the melted adhesive film can fill these gaps, providing some support.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A solar cell for a stacked assembly, characterized in that: It includes at least two battery cell bodies, with adjacent battery cell bodies welded together by several welding strips. There is an overlap area between adjacent battery cell bodies, and buffer strips for clamping the welding strips are provided on the opposite surfaces of the overlap area of ​​the two battery cell bodies.

2. A solar cell for a stacked assembly according to claim 1, characterized in that: The shape of the buffer strip is rectangular, rhomboid, or elliptical.

3. A solar cell for a stacked assembly according to claim 1, characterized in that: The cushioning strip is formed by printing.

4. A solar cell for a stacked assembly according to claim 1, characterized in that: The buffer strip is made of UV adhesive or thermosetting adhesive.

5. A solar cell for a stacked assembly according to claim 1, characterized in that: The thickness of the buffer strip is 0.05mm-0.3mm, and the width of the buffer strip is less than 2mm.

6. A solar cell for a stacked assembly according to claim 1, characterized in that: The length of the buffer strip is less than the width of the battery cell body.

7. A solar cell for a stacked assembly according to claim 1, characterized in that: The buffer strip includes several strip segments, which are arranged corresponding to the main grid of the battery cell body.

8. A solar cell for a stacked assembly according to claim 7, characterized in that: The length of the adhesive strip segment is greater than 1 mm.

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