阅读说明：本技术 导电胶带、叠瓦组件及其制备方法 (Conductive adhesive tape, laminated tile assembly and preparation method thereof ) 是由 范圣凯 何志富 申佳林 赵小强 施海旋 曹国进 朱琛 吕俊 于 2020-05-08 设计创作，主要内容包括：本发明涉及一种导电胶带、叠瓦组件及其制备方法,包括：PET膜、第一胶水层、第二胶水层以及离型膜,其中所述第一胶水层和第二胶水层分别设置在所述PET膜的两侧,所述离型膜作为所述导电胶带的衬底,且所述离型膜与所述第一胶水层相连,所述PET膜上设有多个孔洞,所述孔洞内填充有导电物体。本发明有利于控制叠瓦电池互叠后应力集中及机载可靠性风险且成本低。(The invention relates to a conductive adhesive tape, a laminated tile assembly and a preparation method thereof, wherein the preparation method comprises the following steps: PET membrane, first glue layer, second glue layer and from the type membrane, wherein first glue layer and second glue layer set up respectively the both sides of PET membrane, from the type membrane conduct the substrate of electrically conductive sticky tape, just from the type membrane with first glue layer links to each other, be equipped with a plurality of holes on the PET membrane, the hole intussuseption is filled with electrically conductive object. The invention is beneficial to controlling stress concentration and airborne reliability risk after the laminated cells are mutually laminated and has low cost.)

1. An electrically conductive adhesive tape, comprising: PET membrane, first glue layer, second glue layer and from the type membrane, wherein first glue layer and second glue layer set up respectively the both sides of PET membrane, from the type membrane conduct the substrate of electrically conductive sticky tape, just from the type membrane with first glue layer links to each other, be equipped with a plurality of holes on the PET membrane, the hole intussuseption is filled with electrically conductive object.

2. The conductive tape of claim 1, wherein: the conductive object is filled in the hole in any one mode of roller coating, printing and dispensing.

3. A shingle assembly, comprising: the battery pack comprises a plurality of battery strings, each battery string comprises at least two battery pieces, and adjacent battery pieces are connected through the conductive adhesive tape of any one of claims 1-2 after the release film is removed.

4. The shingle assembly of claim 3, wherein: the battery piece comprises a front electrode and a back electrode, wherein the front electrode of one battery piece is connected with the back electrode of the other battery piece through the conductive object of the conductive adhesive tape.

5. The shingle assembly of claim 3, wherein: one glue layer of the conductive adhesive tape is connected with the front electrode of one cell piece, and the other glue layer of the conductive adhesive tape is connected with the back electrode of the other cell piece.

6. The shingle assembly of claim 3, wherein: the battery strings are connected through the conductive strips, and the conductive strips are connected with the battery strings through the conductive adhesive tapes.

7. The shingle assembly of claim 6, wherein: the conductive strips are located at any one of the upper, middle and lower ends of the shingle assembly.

8. A method for producing a conductive adhesive tape according to any one of claims 1 to 2, comprising the steps of:

step S1: after the PET film is cleaned, coating a first glue layer and a second glue layer on two sides of the PET film respectively;

step S2: punching the PET film to form a plurality of holes;

step S3: adhering a release film to one end, which is bonded with a first glue layer, of the PET film, and taking the release film as a substrate of the conductive adhesive tape;

step S4: and filling a conductive object in the hole to form the conductive adhesive tape.

9. The method for producing an electrically conductive adhesive tape according to claim 8, characterized in that: and after the step S4 is finished, mechanically winding the formed conductive adhesive tape into a coil to manufacture a finished conductive adhesive tape.

10. The method for producing an electrically conductive adhesive tape according to claim 8, characterized in that: the pattern and distribution of the holes correspond to the positive electrode or the negative electrode of the laminated battery.

Technical Field

The invention relates to the technical field of interconnection of novel laminated assemblies, in particular to a conductive adhesive tape, a laminated assembly and a preparation method thereof.

Background

Traditional solar module is formed by a plurality of battery pieces series connection, this series structure can lead to the obvious reduction of subassembly efficiency when hot spot phenomenon appears, in order to reduce the influence of this phenomenon to subassembly efficiency, and inherit the purpose of promoting the subassembly power, the lamination subassembly has been produced, crystalline silicon battery piece is divided into five along positive electrode or negative electrode direction one and is cut promptly, then take the lamination mode to carry out the overlap joint between piece and the piece, take the parallel series-parallel mode to be connected between string and the string, thereby showing and reducing hot spot effect, the subassembly power has been promoted.

With the rapid development of solar photovoltaic module technology, the laminated tile module gradually becomes one of the main distributed applications of the photovoltaic module due to the excellent appearance and high output power. The imbricated assembly and the traditional assembly are characterized in that the imbricated assembly and the traditional assembly are connected by the interconnection technology among the battery pieces, the traditional assembly is completely connected by adopting the solder strip in a conductive manner, so that the insufficient soldering phenomenon is easy to occur, the production yield is low, the stress of soldering tin alloy at the welding position is large, and the battery pieces are easy to crack; and the shingle assembly realizes the conductive interconnection among the battery pieces after the low-temperature conductive adhesive is heated and cured, and the battery strings and the shingle assembly are interconnected by adopting a punching welding strip in a welding way, so that the problems of low production speed, difficult control of the quality of finished products and the like still exist although the yield is improved.

In order to solve the above problems, the existing chinese patent (CN107768473A) discloses a solar laminated cell and a welding method thereof, wherein double-sided conductive tapes are used for welding between solar laminated cells. The welding between the laminated battery pieces is realized by using the double-sided conductive adhesive, and the problems of low production speed, difficult control of finished product quality and the like when liquid conductive adhesive is used are solved, but the problems of reliability risk and cost of bonding the battery by using the conductive adhesive tape are not considered.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the reliability risk and high cost problem of the double-sided conductive adhesive tape in the prior art, so that the conductive adhesive tape, the laminated assembly and the preparation method thereof are provided, which are beneficial to controlling stress concentration and onboard reliability risk after the laminated cells are mutually laminated and have low cost.

In order to solve the above technical problem, the present invention provides a conductive adhesive tape, comprising: PET membrane, first glue layer, second glue layer and from the type membrane, wherein first glue layer and second glue layer set up respectively the both sides of PET membrane, from the type membrane conduct the substrate of electrically conductive sticky tape, just from the type membrane with first glue layer links to each other, be equipped with a plurality of holes on the PET membrane, the hole intussuseption is filled with electrically conductive object.

In an embodiment of the present invention, the conductive object is filled in the hole by any one of roll coating, printing and dispensing.

The invention also provides a laminated tile assembly which comprises a plurality of battery strings, wherein each battery string comprises at least two battery pieces, and the adjacent battery pieces are connected through any one of the conductive adhesive tapes after the release film is removed.

In one embodiment of the invention, the battery piece comprises a front electrode and a back electrode, and the front electrode of one battery piece is connected with the back electrode of the other battery piece through the conductive object of the conductive adhesive tape.

In one embodiment of the invention, one glue layer of the conductive adhesive tape is connected with the front electrode of one cell piece, and the other glue layer of the conductive adhesive tape is connected with the back electrode of another cell piece.

In one embodiment of the invention, the battery strings are connected through conductive strips, and the conductive strips are connected with the battery strings through the conductive adhesive tapes.

In one embodiment of the invention, the conductive strips are located at any one of the upper, middle and lower ends of the stack.

The invention also provides a preparation method of the conductive adhesive tape, which is used for preparing the conductive adhesive tape and comprises the following steps: after the PET film is cleaned, coating a first glue layer and a second glue layer on two sides of the PET film respectively; punching the PET film to form a plurality of holes; adhering a release film to one end, which is bonded with a first glue layer, of the PET film, and taking the release film as a substrate of the conductive adhesive tape; and filling a conductive object in the hole to form the conductive adhesive tape.

In one embodiment of the present invention, after step S4 is completed, the formed conductive tape is mechanically wound into a roll to form a finished conductive tape.

In one embodiment of the invention, the pattern and distribution of the holes corresponds to the segmented positive or negative electrode of the laminated cell.

Compared with the prior art, the technical scheme of the invention has the following advantages:

according to the conductive adhesive tape, the laminated assembly and the preparation method thereof, the PET is used as the supporting layer, and the stress concentration and the airborne reliability risk of the laminated battery after being mutually laminated are controlled by controlling the thickness of the PET;

according to the invention, the mode of filling the conductive adhesive after punching holes on the PET reduces the consumption of the conductive adhesive and the cost, and simultaneously, the punched patterns and the distribution sizes can correspond to the positive electrode or the negative electrode of the laminated battery;

according to the invention, the battery piece and the conductive strips are bonded by using the conductive adhesive tape, so that flexible interconnection among the battery strings is realized, and meanwhile, the phenomenon of insufficient welding of the conductive strips is avoided.

Drawings

In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the embodiments of the present disclosure taken in conjunction with the accompanying drawings, in which

FIG. 1 is a schematic view of a conductive tape of the present invention;

FIG. 2 is an enlarged view of the conductive tape of the present invention;

FIG. 3 is a schematic perspective view of a battery string according to the present invention;

fig. 4 is a schematic cross-sectional view of a battery string according to the present invention;

figure 5 is a schematic view of a shingle assembly of the present invention.

The specification reference numbers indicate: 10-conductive adhesive tape, 11-PET film, 12-first glue layer, 13-second glue layer, 14-release film, 15-conductive object, 20-battery string, 21-first battery piece, 210-first front electrode, 22-second battery piece, 220-second back electrode and 24-conductive strip.

Detailed Description