Photovoltaic module backboard and photovoltaic module

By setting a preset gap between the lead hole and the bus bar of the back plate of the photovoltaic module and the end plate is installed on the side of the lead hole, the safety and reliability problems caused by the penetration of metal materials and water vapor in the existing photovoltaic cell back plate are solved, and the effect of improving insulation performance and reducing water vapor infiltration is achieved.

CN222692212UActive Publication Date: 2025-03-28TRINA SOLAR CO LTD
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Patent Information

Application Number
CN202420639314.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-29
Publication Date
2025-03-28
Estimated Expiration
2034-03-29

AI Technical Summary

Technical Problem

The existing photovoltaic battery backplane uses an aluminum foil layer, and there is a metal material, which affects the safety and reliability of the battery and is prone to power attenuation due to water vapor penetration.

Method used

A photovoltaic module back panel is designed, including a weather-resistant layer, an aluminum foil layer, a support layer and an adhesive layer of a laminated structure. A preset gap is provided between the lead hole and the bus bar, and an end plate is provided on the side of the lead hole to reduce water vapor penetration.

Benefits of technology

The preset gap prevents the aluminum foil layer from contacting the bus bar, and improves the insulation performance; reduces water vapor penetration through the end plate, and improves the reliability of the back plate of the photovoltaic module.

✦ Generated by Eureka AI based on patent content.
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Abstract

The utility model relates to a photovoltaic assembly backboard and a photovoltaic assembly. The back plate comprises a plate body and end sealing plates; the plate body comprises a weather-proof layer, an aluminum foil layer, a supporting layer and a bonding layer which are stacked in the thickness direction of the plate body, the plate body is provided with a lead hole for a bus bar to penetrate through, the lead hole penetrates through the plate body in the thickness direction of the plate body, and a preset gap is formed between the hole wall of the lead hole and the bus bar contained in the lead hole; an end sealing plate is arranged on at least one side of the lead hole in the thickness direction of the plate body, one end of the end sealing plate is connected to the weather-proof layer or the bonding layer, and the other end of the end sealing plate is used for abutting against a packaging adhesive film connected with the bus bar. The preset gap is formed between the hole wall of the lead hole and the bus bar, so that the aluminum foil layer is prevented from making contact with the bus bar, the insulation performance of the plate body is improved, the end sealing plate is arranged on at least one side of the lead hole, one end of the end sealing plate is connected to the weather-proof layer or the bonding layer, and the other end of the end sealing plate abuts against the packaging adhesive film. Therefore, water vapor permeation at the wire outlet hole is effectively reduced, and the reliability is improved.
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