Welding-free, lamination-free, dismantable and recyclable photovoltaic assembly

Abstract

The invention discloses a welding-free, lamination-free, dismantable and recyclable photovoltaic assembly. A plurality of battery sheets are connected in series through a plurality of double-sided conductive adhesive tapes so as to form a battery sheet string. The photovoltaic assembly is provided with a front-surface material, double-sided conductive adhesive tapes, a battery sheet string, double-sided conductive adhesive tapes and a back plate which are distributed from top to bottom sequentially; one surface of each double-sided conductive adhesive tape is in adhesive connection with the anode or cathode of the corresponding battery sheet, and the other surface of each double-sided conductive adhesive tape is in adhesive connection with the lower surface of the front-surface material or the upper surface of the back plate; and the adhesive connection between the double-sided conductive adhesive tapes and the front-surface material, adhesive connection between the double-sided conductive adhesive tapes and the battery sheets, and the adhesive connection between the double-sided conductive adhesive tapes and the back plate are dismantable adhesive connection. The manufacture process of the photovoltaic assembly includes the following steps that: the battery sheets are connected in series through the double-sided conductive adhesive tapes so as to form the battery sheet string; the battery sheet string is laid between the front-surface material and the back plate, and the battery sheet string, the front-surface material and the back plate can be boned together through the double-sided conductive adhesive tapes dismantably; and the edge of the photovoltaic assembly is sealed through insulating transparent adhesive tapes, and the interior space of the photovoltaic assembly is vacuumized during a sealing process. The photovoltaic assembly of the invention has the advantages of no need for welding, no need for lamination, energy-saving performance, environmental friendliness, high safety, operational easiness, recyclability and the like.

Description

technical field [0001] The invention relates to the field of photovoltaic technology, and more specifically relates to a welding-free, lamination-free, disassembleable and recyclable photovoltaic module and its manufacturing process. Background technique [0002] Photovoltaic modules can convert light energy into electrical energy, and the cells packaged in photovoltaic modules are the photoelectric conversion units of photovoltaic modules. The structure of existing photovoltaic modules generally includes from top to bottom: photovoltaic glass (1), upper layer EVA (2), cell string (3), lower layer EVA (4), TPT backplane (5) and aluminum alloy frame (6 ),Such as figure 1 shown. The manufacturing method of the existing photovoltaic modules usually includes the following steps: firstly weld the battery sheets into a battery string with welding tape, lay the battery string, glass, cut EVA, and the back plate according to a certain level; Each layer of material is put into the...

AI Technical Summary

Problems solved by technology

[0005] Since the soldering tool is usually an electric soldering iron, the lamination tool is usually a laminator, both of which use electric heating to complete the work; an electric soldering iron has a power of several hundred watts, while a standard component workshop needs to be equipped with tens to hundreds of For Taidian soldering iron, the power of a single laminator reaches tens of kilowatts; therefore, welding and lamination concentrate more than 90% of the energy consumption in the process of component packaging

[0006] 2. Exhaust gas emission

[0008] 3. Potential safety hazards

[0009] Since both welding and lamination are electric heating equipment, the welding temperature is above 200 degrees Celsius, and the lamination temperature is also around 140 degrees Celsius. Once improperly operated, it is very easy to cause bodily injury to the operator. There have also been incidents of heat transfer oil explosion accidents in laminating machines. repeatedly

[0010] 4. Cause secondary waste and environmental pollution

[0011] For the photovoltaic modules produced by the existing process, the five layers of materials in the packaged photovoltaic modules are permanently bonded together, which cannot be effectively peeled off, sorted and recycled; because most of the photovoltaic module materials are glass with good stability and many Molecular anti-aging materials, so scrapped photovoltaic modules will become another troublesome pollutant once the photovoltaic module reaches the end of its service life

[0012] The various shortcomings of existing photovoltaic modules show that at this stage, it is of great significance to develop green, environmentally friendly, solder-free, lamination-free, disassembled and recyclable photovoltaic modules

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