CN213878111U - Half heterojunction photovoltaic module of MBB copper bars - Google Patents

Abstract

The utility model discloses a half heterojunction photovoltaic module of MBB copper bars, photovoltaic module from the top down is upper glass, upper EVA POE solar energy encapsulation membrane, battery cluster, lower floor EVA POE solar energy encapsulation membrane, lower floor's glass encapsulation in proper order and forms, the battery cluster is formed through welding the parallelly connected mode welding of welding after establishing ties earlier by half heterojunction battery of copper bars, install the terminal box on the upper glass. The utility model discloses under the prerequisite that does not change current subassembly encapsulation equipment line body, the solderability is good, and the welding pulling force uniformity of each position of battery is good, and the series resistance reduces, and when the subassembly was used in the power station, calorific capacity reduced, subassembly power generation pond gain is high, and anti latent ability of splitting is strong, promotes the subassembly reliability; and is a half-chip packaging technology, the hot spot resistance is also improved; the cost of the MBB copper grid battery component is far lower than that of the MBB silver grid component because expensive silver is replaced by copper, and the MBB copper grid battery component is low in fragment rate, high in yield and lower in comprehensive cost in the manufacturing process.

Description

Half heterojunction photovoltaic module of MBB copper bars

Technical Field

The utility model relates to a heterojunction photovoltaic module technical field especially relates to a half heterojunction photovoltaic module of MBB copper bars.

Background

With the high development of photovoltaic industrialization, efficiency improvement and cost reduction become the primary tasks of enterprises, and the MBB half-chip module technology for efficiency improvement and cost reduction becomes the development trend; the MBB silver paste printing process is mainly used in the industry at present, the thickness of a silicon wafer is more than 170 mu m, an MBB half-wafer assembly is formed by cutting one half of a whole cell, the half cells are subjected to circuit design in a mode of connecting the half cells in series and then in parallel, and the half cells are packaged through procedures of laminating, confluence welding, laminating and the like to obtain the required effect; the utility model discloses, use the thin silicon chip copper bars heterojunction battery below 120 mu m to encapsulate into MBB subassembly, its generating efficiency is higher, and manufacturing cost is lower.

The silver gate battery is used in the conventional component packaging process, the silver gate battery packaged by the component adopts expensive silver paste to print on the silicon chip, the silicon chip belongs to a fragile product, the silicon chip belongs to a stress process in the printing process, so that the silicon chip generates dark damage, the component is packaged, and the battery piece is easy to break by welding; after lamination, partial subfissure and splintering can be generated; the silver gate battery is printed by silver paste, and in the process of preparing the assembly, the welding effect of a solder strip tin coating layer and the silver paste electrode is poor, the series resistance is increased, and the photoelectric conversion utilization rate is low; the silver gate battery has high requirement on the thickness of a silicon wafer due to the limitation of a printing process, and the thickness of the silicon wafer becomes a bottleneck for reducing the cost.

SUMMERY OF THE UTILITY MODEL

To the problem, the utility model provides an anti latent ability of splitting is strong, and the piece rate is low, and the yield is high, and the lower half heterojunction photovoltaic module of MBB copper bars of comprehensive cost.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the utility model provides a half heterojunction photovoltaic module of MBB copper grid, photovoltaic module from the top down is upper glass, upper EVA POE solar energy encapsulation membrane, battery cluster, lower floor EVA POE solar energy encapsulation membrane, lower floor's glass encapsulation in proper order and forms, the battery cluster is formed by the parallelly connected mode welding of copper grid half heterojunction battery after establishing ties earlier through the solder strip, install the terminal box on the upper glass.

Furthermore, the copper grid half-piece heterojunction battery is cut by one half of an MBB copper grid whole-piece heterojunction battery with the thickness of 90-120 mu m.

Furthermore, each battery string is welded in a mode that 10-14 batteries are connected in series and then connected in parallel.

Furthermore, the battery string is welded by a circular welding strip or a triangular tin-coated welding strip.

From the above description of the structure of the present invention, compared with the prior art, the present invention has the following advantages:

the utility model discloses under the prerequisite that does not change current subassembly encapsulation equipment line body, MBB copper bars subassembly packaging process solderability is good, the welding pulling force uniformity of each position of battery is good, the series resistance reduces, the subassembly is when the power station uses, calorific capacity reduces, subassembly power generation pond gain is high, the two-sided electricity generation gain reaches 25% in the high occasion of face reflection, collocation MBB copper bars 90 mu m ultra-thin copper battery, the pliability is better, its thin grid line is the electro-coppering preparation, when playing the electric current collection effect, can play better guard action to the battery again, anti latent ability of splitting is strong, promote the subassembly reliability; and is a half-chip packaging technology, the hot spot resistance is also improved; the cost of the MBB copper grid battery component is far lower than that of the MBB silver grid component because expensive silver is replaced by copper, and the MBB copper grid battery component is low in fragment rate, high in yield and lower in comprehensive cost in the manufacturing process.

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:

figure 1 is the utility model relates to a half heterojunction photovoltaic module's of MBB copper bars structural schematic diagram.

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.

Examples

Referring to fig. 1, a half heterojunction photovoltaic module of MBB copper grid, photovoltaic module from the top down is upper glass 1, upper EVA POE solar energy encapsulation membrane 2, battery cluster 3, lower floor EVA POE solar energy encapsulation membrane 4, the encapsulation of lower floor glass 5 in proper order and forms, the battery cluster is welded through the mode of welding that the area of welding is established ties earlier afterwards parallelly connected by copper grid half heterojunction battery and forms, every cluster of battery cluster 3 is welded by the mode of establishing ties earlier after 10-14 and connects, install terminal box 6 on the upper glass.

The copper grid half heterojunction battery is cut by one half of an MBB copper grid whole heterojunction battery with the thickness of 90-120 mu m. The packaging structure has the advantages of low cost, strong anti-subfissure capability, strong hot spot resistance capability when in outdoor practical use due to the use of half-piece packaging, lower internal loss of the assembly after half-cutting and lower packaging power loss.

The battery string 3 is welded by adopting a circular welding strip or a triangular tin-coated welding strip, the shielding is less than that of a flat welding strip, the optical loss of the assembly is small, and the utilization rate is high.

The utility model discloses under the prerequisite that does not change current subassembly encapsulation equipment line body, MBB copper bars subassembly packaging process solderability is good, the welding pulling force uniformity of each position of battery is good, the series resistance reduces, the subassembly is when the power station uses, calorific capacity reduces, subassembly power generation pond gain is high, the two-sided electricity generation gain reaches 25% in the high occasion of face reflection, collocation MBB copper bars 90 mu m ultra-thin copper battery, the pliability is better, its thin grid line is the electro-coppering preparation, when playing the electric current collection effect, can play better guard action to the battery again, anti latent ability of splitting is strong, promote the subassembly reliability; and is a half-chip packaging technology, the hot spot resistance is also improved; the cost of the MBB copper grid battery component is far lower than that of the MBB silver grid component because expensive silver is replaced by copper, and the MBB copper grid battery component is low in fragment rate, high in yield and lower in comprehensive cost in the manufacturing process.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (4)

1. The utility model provides a half heterojunction photovoltaic module of MBB copper gate which characterized in that: photovoltaic module from the top down is upper glass (1), upper EVA POE solar energy packaging film (2), battery cluster (3), lower floor EVA POE solar energy packaging film (4), lower floor glass (5) encapsulation in proper order and forms, battery cluster (3) are established ties earlier through the solder strip by copper bars half heterojunction battery and are formed by the mode welding parallelly connected after, install terminal box (6) on the upper glass.

2. The MBB copper grid half-heterojunction photovoltaic module of claim 1, wherein: the copper grid half heterojunction battery is cut by one half of an MBB copper grid whole heterojunction battery with the thickness of 90-120 mu m.

3. The MBB copper grid half-heterojunction photovoltaic module of claim 1, wherein: and each battery string (3) is welded in a mode that 10-14 batteries are connected in series and then connected in parallel.

4. The MBB copper grid half-heterojunction photovoltaic module of claim 1, wherein: the welding of the battery string (3) adopts a circular welding strip or a triangular tin-coated welding strip.

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