Interconnection material and series welding process of battery strings

A battery and process technology, applied in the direction of circuits, photovoltaic power generation, electrical components, etc., can solve problems such as not so beautiful, increased shading area, increased risk of overlapping points, etc., to achieve the effect of ensuring equipment production capacity

Pending Publication Date: 2022-01-11
云上新能源开发(杭州)有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

The biggest advantage of this process is that because the flat welding ribbon is used on the back, it is not necessary to use thickened adhesive material on the back, but the thickened adhesive material is still used on the front, especially if the triangular welding ribbon is used on the front, it is more expensive than It is thicker when using round welding strips; on the other hand, due to the existence of overlapping points, the reliability risk of poor welding and long-term operation is increased, and the overlapping length of flat welding strips and round welding strips must be long enough,

Method used

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  • Interconnection material and series welding process of battery strings

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Embodiment 1

[0032] combined with figure 1 , a kind of interconnection material of the present embodiment, comprises welding wire, and the radial dimension of described welding wire is 0.05-0.35mm, is preferably 0.1-0.25mm, for example, 0.1mm, 0.15mm and 0.2mm etc., and described welding wire is made of 2 - 15 microwires 1 twisted, at least some of which are copper wires for conducting electricity, each of said microwires 1 having a radial dimension between 30-200 μm, for example, 30 μm, 100 μm and 200 μm etc., the surface of each microwire 1 is provided with a metal coating 2 with a low melting point, and the material of the metal coating 2 can be low melting point metals such as tin, lead, and bismuth. The material is preferably tin, which can resist oxidation, increase reflection, and enhance welding. Of course, the metal coating 2 can also contain a small amount of silver and copper components to adjust welding performance and reliability. The surface of the microwire 1 has a metal co...

Embodiment 2

[0041] A string welding process for battery strings, comprising the steps of welding a stranded welding wire on the bus electrode on the front of the battery sheet, and flattening one end of the welding wire cut into a fixed length to a thickness of 0.5-0.1mm before welding, and simultaneously welding the welding wire Apply flux on the surface; after welding, the flattened part is exposed to the edge of the cell by 5-35mm, and the flattened part can extend to the front edge of the cell; the single cell with welding wire is connected in series, in order to facilitate positioning, you can Position and place the front part of the good welding wire of the battery sheet welding machine facing down, and then place the battery sheets one by one so that the welding wire exposed on the front edge is aligned with the bus electrode on the back, and then perform heating welding, repeat the same process, and make the battery string Reach the set length; the welding wire on the battery sheet...

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Abstract

The invention discloses an interconnection material and a series welding process of a battery string, the interconnection material comprises a welding wire, the radial size of the welding wire is 0.05-0.35 mm, the welding wire is formed by twisting a plurality of microwires, and the surface of each microwire is provided with a metal coating with a low melting point. The invention provides an interconnection material and a series welding process of a battery string, aiming at solving the technical problem that the existing interconnection material has more defects in an interconnection process, which can overcome the technical problem and ensure the quality of the finally obtained battery string.

Description

technical field [0001] The invention relates to the technical field of photovoltaic equipment, in particular to an interconnection material and a string welding process of battery strings. Background technique [0002] The stringing process is determined by the design of interconnection materials and cell structures. There are three main interconnection processes at present: [0003] Rectangular Ribbon Interconnection: By using a conventional stringer, two, three, four, five, or six bus electrodes can be connected in series. The main thing is to put an interconnection strip on the bus electrodes on the upper and lower sides of the battery at the same time, and then Soldering tin and bus electrodes by high temperature is the most conventional process. There are two variants of this process, one is to make a zigzag or a single triangular peak on the interconnection strip on the light-receiving surface, and the other is flat, mainly to increase the reflection of the welding st...

Claims

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Application Information

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IPC IPC(8): H01L31/05H01L31/18B23K3/00B23K3/08B23K101/36
CPCH01L31/0508H01L31/0512H01L31/18B23K3/00B23K3/082B23K2101/36Y02E10/50Y02P70/50
Inventor 阙文修武宇涛
Owner 云上新能源开发(杭州)有限公司
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