Optimized welding pattern of battery piece

Abstract

The utility model discloses an optimized welding pattern of a battery piece, which belongs to the field of battery pieces and comprises a bonding pad, and the front surface and the back surface of the bonding pad are square; the left side and the right side of the bonding pad are each provided with a first pattern gradient, the top and the bottom of the bonding pad are each provided with a second pattern gradient, the top and the bottom of the bonding pad are each provided with a main grid connecting line, the outer surface of each main grid connecting line is provided with a third pattern gradient, the number of the first pattern gradients is two, and the first pattern gradients are symmetrically distributed above the left side and the right side of the bonding pad. The number of the second pattern gradient and the number of the main grid connecting lines are both two, and the second pattern gradient and the main grid connecting lines are symmetrically distributed between the top and the bottom of the pad. According to the solar cell, a welding pattern is optimized, and a plurality of irregular pattern gradient parts are arranged at the periphery of the bonding pad and the outer surface of the main grid connecting line, so that a printing window is widened, the problems of hollowing and virtual printing are solved, more slurry system designs are compatible, and better welding performance is brought.

Description

Technical Field

[0001] The utility model relates to the field of battery cells, in particular to an optimized welding pattern of a battery cell. Background Art

[0002] Solar cells are generally categorized into monocrystalline silicon, polycrystalline silicon, and amorphous silicon. Monocrystalline silicon solar cells are currently the fastest-growing type of solar cell. Their structure and production process are finalized, and products are widely used in both space and terrestrial applications. These solar cells are made from high-purity monocrystalline silicon rods. To reduce production costs, solar cells for terrestrial applications use solar-grade monocrystalline silicon rods, with somewhat relaxed material performance requirements. Some also use scrap and inferior monocrystalline silicon material from semiconductor device processing, which is redrawn into monocrystalline silicon rods specifically for solar cells.

[0003] Driven by market conditions, there is great pressure to reduce costs and improve efficiency. In order to improve efficiency, the slurry system is optimized towards high plasticity and poor fluidity. However, in the existing graphic design, during the screen production process, through the wire drawing method, when arranging the lines, it is easy to cause local wire drawing problems at the PAD position after overlapping with the main grid PAD points. Due to the changes in the slurry system, the obstruction of the steel wire after local wire drawing and the poor fluidity of the slurry, it is easy to cause hollowing / virtual printing problems at the PAD points, resulting in uneven PAD points, bringing welding tension and cold solder joint risks, making the existing graphic design incompatible with better printing performance. Utility Model Content

[0004] In order to solve the problem that the busbar PAD is prone to virtual printing / hollowing when the existing pattern design matches the high-plasticity paste printing, and the unevenness / hollowing of the PAD surface leads to low tension / cold welding during welding, the utility model provides a battery cell optimized welding pattern. The technical solution is as follows:

[0005] An optimized welding pattern for a battery cell includes a welding pad, wherein the front and back surfaces of the welding pad are both square;

[0006] The left and right sides of the pad are both provided with a first graphic gradient, the top and bottom of the pad are both provided with a second graphic gradient, the top and bottom of the pad are both provided with a main grid connection line, and the outer surface of the main grid connection line is provided with a third graphic gradient.

[0007] Preferably, the number of the first graphic gradients is two and they are symmetrically distributed above the left and right sides of the pad.

[0008] Preferably, the number of the second pattern gradient and the number of the main grid connection lines are both two and they are symmetrically distributed between the top and the bottom of the pad.

[0009] Preferably, one end of the two main grid connection lines away from the pad passes through and extends to the outside of the two second pattern gradients respectively.

[0010] Preferably, the number of the third pattern gradients is several and they are evenly distributed on the top and bottom of the outer surface of the main grid connection line.

[0011] Preferably, the main grid connection line passes through and extends to the outside of the third graphic gradient, and a fixing hole with a size matching that of the main grid connection line is opened inside the third graphic gradient.

[0012] Multiple irregular graphic gradients are set around the pads and on the outer surface of the main grid connection line to widen the printing window and solve the hollowing and virtual printing problems, so as to be compatible with more slurry system designs and bring better welding performance.

[0013] Beneficial effects:

[0014] The beneficial effects produced by adopting the technical solution of this utility model are as follows:

[0015] The cell optimizes the welding pattern and sets multiple irregular pattern gradients around the pad and the outer surface of the main grid connection line to widen the printing window and solve the hollowing and virtual printing problems, so as to be compatible with more slurry system designs, thereby bringing better welding performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a schematic diagram of the overall structure of a battery cell optimized welding pattern of the utility model;

[0018] Figure 2 This is a front view structural diagram of an optimized welding pattern of a battery cell of the utility model;

[0019] Figure 3 It is a side structural schematic diagram of an optimized welding pattern of a battery cell of the present invention.

[0020] In the figure, 1, solder pad; 2, first graphic gradient; 3, second graphic gradient; 4, main grid connection line; 5, third graphic gradient. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] like Figure 1-3 As shown, an optimized welding pattern of a battery cell includes a pad 1, and the front and back surfaces of the pad 1 are both square;

[0023] The left and right sides of the pad 1 are both provided with first graphic gradients 2. The number of first graphic gradients 2 is two and they are symmetrically distributed above the left and right sides of the pad 1.

[0024] The top and bottom of the pad 1 are both provided with a second pattern gradient 3, and the top and bottom of the pad 1 are both provided with a main grid connection line 4. The number of the second pattern gradient 3 and the main grid connection line 4 are both two and are symmetrically distributed between the top and bottom of the pad 1. The ends of the two main grid connection lines 4 away from the pad 1 respectively pass through and extend to the outside of the two second pattern gradients 3;

[0025] The outer surface of the main grid connection line 4 is provided with a third graphic gradient 5, and the ends of the two main grid connection lines 4 away from the pad 1 respectively pass through and extend to the outside of the two second graphic gradients 3, and the main grid connection line 4 passes through and extends to the outside of the third graphic gradient 5. The interior of the third graphic gradient 5 is provided with a fixing hole that is adapted to the size of the main grid connection line 4.

[0026] In this embodiment, the first graphic gradient 2, the second graphic gradient 3 and the third graphic gradient 5 are used to widen the printing window and solve the hollowing and virtual printing problems, thereby being compatible with more slurry system designs and bringing better welding performance.

[0027] The utility model sets a plurality of irregular graphic gradients around the pad 1 and the outer surface of the main grid connection line 4 to widen the printing window, solve the hollowing and virtual printing problems, and thus be compatible with more slurry system designs, thereby bringing better welding performance.

[0028] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A battery cell optimized welding pattern, characterized in that: include: A soldering pad (1), wherein both the front and back sides of the soldering pad (1) are square; The left and right sides of the pad (1) are both provided with a first graphic gradient (2), the top and bottom of the pad (1) are both provided with a second graphic gradient (3), the top and bottom of the pad (1) are both provided with a main grid connection line (4), and the outer surface of the main grid connection line (4) is provided with a third graphic gradient (5).

2. The battery cell optimized welding pattern according to claim 1, characterized in that: The number of the first graphic gradients (2) is two and they are symmetrically distributed above the left and right sides of the pad (1).

3. The battery cell optimized welding pattern according to claim 1, characterized in that: The number of the second graphic gradient (3) and the main grid connection line (4) are both two and they are symmetrically distributed in the middle of the top and bottom of the pad (1).

4. The battery cell optimized welding pattern according to claim 3, characterized in that: One end of the two main grid connection lines (4) away from the pad (1) respectively passes through and extends to the outside of the two second graphic gradients (3).

5. The battery cell optimized welding pattern according to claim 1, characterized in that: The number of the third graphic gradients (5) is several and they are evenly distributed on the top and bottom of the outer surface of the main grid connection line (4).

6. The battery cell optimized welding pattern according to claim 1, characterized in that: The main grid connection line (4) passes through and extends to the outside of the third graphic gradient (5), and a fixing hole having a size adapted to that of the main grid connection line (4) is provided inside the third graphic gradient (5).

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