Battery piece printing pattern for improving power of topcon component

Abstract

The utility model discloses a battery piece printing pattern for promoting TOPCon component power relates to the battery field, including at least two pieces, a plurality of pieces are arranged side by side, and the main grid between the mutual close one end of adjacent two pieces is formed into the structure of the fishhook closure, through the battery piece printing pattern of the utility model, laser cutting forms a plurality of pieces at the component end first, and then the series welding connection can reduce the short circuit current of component, thereby reducing the power loss of component, further promoting the component power, effectively reducing the proportion of poor welding, and improving the yield of component end.

Description

Technical Field

[0001] This utility model relates to the field of batteries, and more particularly to a printed pattern for battery cells used to improve the power of TOPCon modules. Background Technology

[0002] Because existing TOPCon cell printed patterns all follow the PERC cell pattern design, both the front and back sides use a harpoon structure design. As silicon wafer thickness gradually decreases to 130-120um, this design will cause frequent defects such as cold solder joints and microcracks during the module soldering process in thinner cells. Utility Model Content

[0003] The purpose of this invention is to design a cell printing pattern for improving the power of TOPCon modules in order to solve the above problems.

[0004] This utility model achieves the above objectives through the following technical solutions:

[0005] The printed pattern of the solar cell used to improve the power of TOPCon modules includes at least two segments; multiple segments are arranged side by side, and the main grids of two adjacent segments that are close to each other at one end are wired together to form a fork-closed structure.

[0006] The beneficial effects of this utility model are as follows: by using the printed pattern of the battery cell of this utility model, multiple segments are first laser-cut at the module end and then connected by series welding, which can reduce the short-circuit current of the module, thereby reducing the power loss of the module, further increasing the power of the module, effectively reducing the proportion of welding defects, and improving the yield of the module end. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of this utility model;

[0008] The corresponding figure labels are:

[0009] 1-Segment, 2-Main gate. Detailed Implementation

[0010] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0011] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0012] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0013] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0014] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0015] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0016] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0017] like Figure 1 As shown, the printed pattern of the cell used to improve the power of the TOPCon module includes at least two segments 1; multiple segments 1 are arranged side by side, and the main grid 2 of two adjacent segments 1 are wired together to form a fork-closed structure.

[0018] Passivation films are deposited on the cross-sections of two adjacent segments 1 that are close to each other.

[0019] The length of the serial welding between the main gates of two adjacent segments that are close to each other is 1-25mm.

[0020] The string width b between the main gates of two adjacent segments that are close to each other is 10-2500um.

[0021] Figure 1 The position of 'a' has been shown. The position of 'b' is explained using the position of 'a'. That is, assuming the entire diagram is shown in the direction of the XY axis, the string length range 'a' is the dimension in the y-axis direction, and the string length range 'b' is the dimension in the x-axis direction.

[0022] The number of slices in slice 1 is 4.

[0023] By using the printed pattern of the battery cell in this invention, multiple segments 1 are first laser-cut at the module end and then connected in series, which can reduce the short-circuit current of the module, thereby reducing the power loss of the module and further improving the power of the module. This invention has more advantages in terms of the superposition of new technologies. Combined with the current half-cell passivation technology, after the battery is cut into 4 segments 1, there are 6 cross-sections. These 6 cross-sections are deposited with passivation films through edge passivation technology, which can improve the battery conversion efficiency by 0.2-0.3%. After being packaged into a module, the power can be further improved by 10-20W.

[0024] The printed pattern designed in this utility model can reduce the proportion of defective component welding through graphic design and optimization, while also having the advantage of increasing component power. Under the same conditions, it can also be superimposed with half-cell passivation technology to show a more significant advantage in increasing component power.

[0025] The technical solution of this utility model is not limited to the specific embodiments described above. All technical modifications made based on the technical solution of this utility model shall fall within the protection scope of this utility model.

Claims

1. A printed pattern for solar cells used to improve the power of TOPCon modules, characterized in that, It includes at least two segments; multiple segments are arranged side by side, and the main gates of two adjacent segments that are close to each other are welded together to form a harpoon-closed structure.

2. The cell printing pattern for improving the power of TOPCon modules according to claim 1, characterized in that, Passivation films are deposited on the cross-sections of two adjacent segments that are close to each other.

3. The cell printing pattern for improving the power of TOPCon modules according to claim 1, characterized in that, The length of the serial welding between the main gates of two adjacent segments that are close to each other ranges from 1 to 25 mm.

4. The cell printing pattern for improving the power of TOPCon modules according to claim 1, characterized in that, The width of the serial solder joint between the main gates of two adjacent segments that are close to each other ranges from 10 to 2500 μm.

5. The cell printing pattern for improving the power of TOPCon modules according to claim 1, characterized in that, The number of slices is 4.

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