CN213184306U

CN213184306U - MBB battery piece

Info

Publication number: CN213184306U
Application number: CN202021479658.2U
Authority: CN
Inventors: 黄家容; 郑剑祥; 宋广华
Original assignee: Gs Solar Fujian Co ltd
Current assignee: Goldstone Fujian Energy Co Ltd
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2021-05-11
Anticipated expiration: 2030-07-24

Abstract

The utility model discloses a MBB battery piece, including the battery piece body, the surface of battery piece body is provided with main grid line and thin grid line, and the surface of battery piece body still is provided with a plurality of pads points, and the pad point evenly distributed is on main grid line, and all pads points are the net shape. The utility model discloses a set up net pad point, reduce battery piece grid line electrode quantity, solved pad point pile tin and caused the hidden problem of splitting of battery piece fragment when having guaranteed battery piece welding pulling force.

Description

MBB battery piece

Technical Field

The utility model relates to a solar energy component field, especially a MBB battery piece.

Background

With the increasing requirement of the photovoltaic market for high power, the MBB (multi busbar) module is popular in the market with high power and high conversion efficiency, and the design of the MBB main gate structure can effectively reduce the internal resistance of the cell, reduce the packaging loss and improve the electrical performance of the module. From the technical point of view, the MBB battery can shorten the conduction distance of current on a fine grid, shorten the current collection path of the battery by more than 50 percent, and reduce the loss of transverse resistance.

In order to increase the effective light receiving area, a thinner and narrower main grid design is generally adopted, and the shading can be reduced by 3%, so that the welding tension of the interconnection bar on the cell piece is mainly the tension of the interconnection bar at a pad point. The pad points on the main grid of the MBB battery piece in the current market are all designed to be flat solid pads, and tin is easily piled on the pads during welding, so that tin metal protrusions are formed on the pad points of the battery piece, and the risks of hidden cracking of the laminated broken piece and the like are huge.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides a MBB battery piece is through adopting net bonding pad point, has solved the bonding pad point and has piled the tin problem when having guaranteed battery piece welding pulling force, reduces battery piece grid line electrode material quantity, the while also the cost is reduced.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the utility model provides a MBB battery piece, includes the battery piece body, the surface table of battery piece body is provided with many main grid lines and many thin grid lines, and battery piece body surface still is provided with a plurality of pad points, and pad point evenly distributed is on main grid line, and all pad points are the net shape.

Furthermore, the inside of each bonding pad adopts a mesh structure design, and the maximum size of the shape of each mesh structure bonding pad is 0.5-2.5 mm.

Furthermore, the width of the grid line inside the battery piece net-shaped structure welding pad is 30-200 microns.

From the above description of the structure of the present invention, compared with the prior art, the present invention has the following advantages: this MBB battery piece adopts the net pad point, when guaranteeing pad point pulling force, has solved the latent broken piece risk that splits of battery piece that pad point pile tin caused, compares in solid pad point simultaneously, reduces battery piece grid line electrode quantity, has effectively reduced the battery piece cost.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:

fig. 1 is a schematic structural view of a battery plate body according to a first embodiment of the present invention;

fig. 2 is a schematic view of a head-to-tail soldering station structure of a battery piece according to a first embodiment of the present invention;

fig. 3 is a schematic diagram of a structure of a middle pad point of a battery plate according to a first embodiment of the present invention;

fig. 4 is a schematic diagram of a pad point structure of a battery plate according to a second embodiment of the present invention;

fig. 5 is a schematic diagram of a pad point structure of a battery cell according to a third embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The first embodiment is as follows: as shown in fig. 1-3, the embodiment of the utility model provides a MBB battery piece, including battery piece body 1, the surface table of battery piece body is provided with many main grid lines and many thin grid lines, and battery piece body surface still is provided with a plurality of pad points, and pad point evenly distributed is on main grid line, and all pad points are the grid shape. In the first embodiment, the thin grid lines in the grid pad points of the battery piece are straight lines, and the thin grid lines are mutually perpendicular and crossed. The grid welding points of the battery piece are divided into a head shape, a tail shape and a middle shape on the main grid, wherein the head welding point 2 and the tail welding point are oval, and the rest welding points 3 in the middle are round. The grid pad points of the battery piece are divided into a head shape, a tail shape and a middle shape on the main grid, wherein the size of the head-tail pad points 2 is larger than that of the middle pad points 3. In the first embodiment, the grid pad dot size of the battery piece is 0.3 mm by 0.3 mm to 2.5 mm by 2.5 mm, preferably 0.8 mm by 0.8 mm to 1.6 mm by 1.6 mm, more preferably 1.4 mm by 0.8 mm for the head and tail grid pad dot size, and 1.0 mm by 0.8 mm for the middle grid pad dot size. The size of the cell body is more than or equal to 156 mm, the specific size can be determined according to actual production needs, and no upper limit value exists. Fig. 2 and 3 are schematic views of head-to-tail pad points and middle pad points, respectively.

Example two: as shown in fig. 4, the structure of the second embodiment is substantially the same as that of the first embodiment, but the difference is that the thin gate lines in the grid pad points in the second embodiment are straight lines, and the thin gate lines are mutually crossed in an inclined manner.

Example three: as shown in fig. 5, the structure of the third embodiment is substantially the same as that of the first embodiment, and the difference is that the thin gate lines in the three grid pad points of the third embodiment are continuous curves regularly arranged in a periodic manner, and the thin gate lines cross each other.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a MBB battery piece, its characterized in that, includes the battery piece body, the surface of battery piece body is provided with many main grid lines and many thin grid lines, and battery piece body surface still is provided with a plurality of pad points, and pad point evenly distributed is on main grid line, and all pad points are the net shape.

2. The MBB cell sheet according to claim 1, wherein the bonding pads are internally designed in a net structure, and the maximum size of each net structure bonding pad is 0.5 mm-2.5 mm.

3. The MBB cell sheet according to claim 1, wherein the width of the grid lines inside the cell sheet mesh-structured bonding pad is 30-200 microns.