Back contact cell, photovoltaic module and preparation method
By setting an isolation groove and a transparent conductive layer in the back contact battery, the problem of hot spot effect in the back contact battery is solved, and the effective output of current and the improvement of battery conversion efficiency are achieved.
CN120835619AActive Publication Date: 2025-10-24JINKO SOLAR (HAINING) CO LTS
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Patent Information
- Application Number
- CN202511313118.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-15
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2045-09-15
AI Technical Summary
Technical Problem
Back contact with the battery can easily cause hot spot effect, leading to a loss of battery conversion efficiency.
Method used
An isolation trench is provided in the back contact battery, including a first trench and a second trench. The first trench is located between a first region and a second region, and the second trench is located within the second region. This isolates the positive and negative electrodes to avoid short circuits, and bridges the high-resistivity amorphous silicon passivation layer and the metal electrode through a transparent conductive layer to achieve current output.
Benefits of technology
It effectively reduces the risk of hot spots, lowers battery conversion efficiency loss, and improves current output efficiency.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention relates to a back contact battery, a photovoltaic module and a preparation method, and relates to the field of photovoltaic technology. The back contact cell includes a substrate, a first doped layer, a second doped layer, and a conductive layer. The substrate comprises a light receiving surface and a backlight surface which are oppositely arranged, the backlight surface comprises at least one first area and at least one second area, and an overlapping area is arranged on the edge, adjacent to the first area, of the second area; the first doping layer is arranged in the first region and the overlapping region, and the doping type of the first doping layer is opposite to that of the substrate; the second doping layer is arranged in the second region, and the doping type of the second doping layer is the same as that of the substrate; the conductive layer is arranged on the sides, away from the substrate, of the first doped layer and the second doped layer; the conductive layer is provided with an isolation groove, the isolation groove comprises a first groove body and a second groove body, the first groove body is arranged between the first area and the second area, and the second groove body is arranged in the second area. The hot spot risk can be effectively reduced, and the battery conversion efficiency loss is reduced.
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