Production process for encapsulating novel solar film cell

Abstract

The invention relates to a production process for encapsulating a novel solar film cell. The encapsulation process comprises the following steps of: directly and flatly coating a layer of thin high-intensity resin on an electrode plate with a back electrode formed by coating a film on a conductive layer, and coating the high-intensity resin on the edge of conductive glass. In the process, continuous and automatic production can be performed by using a mature coating machine and other machines.

Description

technical field [0001] The invention relates to a solar thin-film battery, including a packaging production process for an amorphous silicon thin-film battery, a copper indium gallium selenium thin-film battery, a chromium antimonide thin-film battery and a flexible thin-film battery. Background technique [0002] At present, all kinds of solar thin-film batteries in the world use two-layer hard materials, sandwiching hot-melt adhesive film materials, and seal the conductive layer of the thin-film battery by lamination in a vacuum and high temperature state, thereby preventing the conductive layer from contacting the outside world. , to protect the conductive layer from oxidation, to ensure the long-term power generation of the conductive film and the long-term use of thin-film solar cells, and to enhance the mechanical strength of thin-film cells. In the current double-layer lamination of solar thin film cells, there are mainly two materials and production methods: one is t...

AI Technical Summary

Problems solved by technology

[0003] 1. The glass layer is easy to crack and break

The reason for cracking is that the thickness of the glass used in thin-film batteries is generally 3.2mm or 4mm, up to 5mm. If the glass used is too thick, it will increase the weight of the thin-film battery module itself, not only increase the transportation weight, such as using it on the top of a building Or on the roof, it will increase the bearing weight

However, when using 3.2mm or 4mm glass, due to its thin thickness, it is easy to cause cracking during edging, chamfering, etc., especially during lamination and lamination.

At present, there are a few factories using toughened glass for the back panel glass, but the production cost will increase greatly, and most of the conductive glass is currently coated on-line. The conductive glass produced by most factories uses ordinary glass, which often leads to bursting problems in the production process of conductive glass

Second, thin-film battery components are also prone to cracking due to vibration, bending, etc. during assembly, transportation, and installation of power generation devices

Third, the service life of solar thin-film batteries is generally required to reach about 20 years. During long-term use, high temperature, hail, birds or discarded objects may cause impact on thin-film batteries and cause rupture

[0004] Once the solar thin-film battery cracks or breaks, rainwater and steam will soak into the interlayer of double-layer glass, which will quickly erode the conductive film, cause oxidation of the conductive film, destroy the conductive layer, attenuate the power generation, and quickly lose power generation , making the thin film battery a waste product

In the production process, glass cracks will cause waste pieces, which will seriously affect the cost, and cracks in the installation and long-term use of the finished product will cause serious damage to the power generation system and increase maintenance costs

Therefore, the cracking of solar thin-film battery glass is the main disadvantage and prominent problem in the production and use of thin-film batteries

[0005] 2. There are many production processes and high cost of double-layer lamination

At present, after coating thin-film batteries, it is necessary to laminate double-layer glass or single-layer glass with PET composite film with aluminum film. the cost of thin film batteries

On the other hand, due to the heavy weight and large volume of double-layer glass, the cost of packaging, transportation and installation is increased.

[0006] 3. At present, the vast majority of thin-film batteries use two layers of glass (or a layer of glass and a layer of PET composite film with aluminum film) sandwiching a layer of EVA or other adhesive materials. The products produced by this production process, if in the production process Poor control of the vacuum, temperature, and flatness of the lamination equipment, or the aging of the adhesive material, will cause the plane, especially the edge, to decrease in sealing, and will easily cause water vapor to penetrate into the interlayer and cause power attenuation.

In order to solve the current defects and disadvantages of solar thin film batteries in production and long-term use, the present invention proposes a new packaging process for solar thin film batteries