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Multi-main-grid crystalline silicon solar battery piece and welding method

A technology of solar cells and welding methods, which is applied in the direction of circuits, photovoltaic power generation, electrical components, etc., can solve the problems that multi-busbar battery strips are prone to offset, limit the development and promotion of multi-busbar technology, and achieve welding Stable and reliable, improve the effect of welding quality

Pending Publication Date: 2017-09-29
LIANYUNGANG SHENZHOU NEW ENERGY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Since multi-busbar ribbons are thinner and lighter than conventional ribbons, the back ribbons of multi-busbar cells are prone to offset, and it is difficult to effectively solve the problem of desoldering of the back ribbons, which limits the development and promotion of multi-busbar technology

Method used

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  • Multi-main-grid crystalline silicon solar battery piece and welding method
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  • Multi-main-grid crystalline silicon solar battery piece and welding method

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Embodiment Construction

[0039] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "inner" and "outer ” refer to directions towards or away from the geometric center of a particular part, respectively.

[0040] like figure 1 As shown, this embodiment provides a multi-busbar crystalline silicon solar cell, which mainly includes a cell body 1, and a front sub-grid 2 located on the front of the cell body, and the sub-grid is mainly composed of a pad 3 Composition, the connection between the pads is connected by a curved connection line 4, and the back side 5 of the cell body is m...

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Abstract

The invention provides a multi-main-grid crystalline silicon solar battery piece. The multi-main-grid crystalline silicon solar battery piece comprises a battery body, a front electrode and a back electrode, wherein the front electrode comprises a plurality of auxiliary grid lines arranged in a uniformly-spaced manner along the vertical direction and a plurality of thin grid lines arranged in the uniformly-spaced manner along the horizontal direction, bonding pads are arranged on the auxiliary grid lines, the widths of the bonding pads are smaller than or equal to 1 mm, and the connection, along the vertical direction, of the bonding pads adopts curve connection; the back electrode are back silver electrodes arranged in the uniformly-spaced manner along the horizontal direction, and the widths of the back electrodes are smaller than or equal to 2 mm. Through the change for the arrangement of the back electrodes of the battery piece and a specific welding method, the multi-main-grid battery piece is stable and firm in welding in the automatic series welding process, solder strips on the back of the multi-main-grid battery piece are free of excursion or desoldering, the welding quality is improved, the solder strips on the front and back can be attached to the multi-main-grid battery piece all the time, and a good welding effect is formed.

Description

technical field [0001] The invention belongs to the technical field of solar cell production technology, and in particular relates to a multi-busbar crystalline silicon solar cell and a welding method. Background technique [0002] The development of human beings is inseparable from energy. With the rapid development of the economy, the demand for energy continues to increase, and the proportion of solar cells in the energy demand will become higher and higher. [0003] At present, the number of busbars of mainstream crystalline silicon solar cell modules on the market is generally 3. In recent years, in order to improve the efficiency of solar cells and reduce costs, battery manufacturers have increased the number of busbars from 3 to 4 from the perspective of improving efficiency. Even 5 sticks. With the development of technology, there has been a multi-busbar technology, that is, printing multiple busbars (generally 10-20 busbars) on the front of the cell. This technolog...

Claims

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Application Information

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IPC IPC(8): H01L31/0224H01L31/05H01L31/18
CPCH01L31/022433H01L31/0504H01L31/188Y02E10/50Y02P70/50
Inventor 王勇秦涛涛张昌远张忠卫郑飞阮忠立
Owner LIANYUNGANG SHENZHOU NEW ENERGY
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