JinkoSolar has been granted a patent for a photovoltaic solar cell that includes a silicon substrate, a passivation layer, and an electrode with a busbar and a finger. The cell also has an extension line that reinforces the connection between the busbar and the electrode pad, without direct contact with the finger. The extension line penetrates the passivation layer and is in contact with the silicon substrate. The electrode pad and busbar are also not in direct contact with the silicon substrate. GlobalData’s report on JinkoSolar gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on JinkoSolar, Artificial photosynthesis was a key innovation area identified from patents. JinkoSolar's grant share as of September 2023 was 58%. Grant share is based on the ratio of number of grants to total number of patents.
Patent granted for a photovoltaic solar cell with reinforced connection
A recently granted patent (Publication Number: US11764313B2) describes a new design for a photovoltaic solar cell and a manufacturing process for producing it. The solar cell includes a silicon substrate with a passivation layer on at least one surface. An electrode, electrode pad, and extension line are printed on the surface of the silicon substrate. The electrode consists of a busbar and a finger that cross each other, with the finger in contact with the silicon substrate. The extension line connects the busbar and the electrode pad, reinforcing their connection without direct contact between the extension line and the finger. The extension line penetrates through the passivation layer and makes contact with the silicon substrate. The electrode pad and busbar do not directly touch the silicon substrate.
The patent also includes several additional claims and variations of the solar cell design. These include specifications for the size and shape of the extension line, the overlapping regions between the extension line and the busbar or electrode pad, and the width of the extension line compared to the busbar. The patent also describes a photovoltaic module that incorporates multiple solar cells with the same design, connected through a conductive line.
The manufacturing process outlined in the patent involves providing a photovoltaic substrate with a passivation layer, printing the electrode pad and busbar using a non fire-through paste, and printing the extension line and finger using a fire-through paste. Different fire-through pastes may be used for the extension line and finger. The extension line is connected to the electrode pad and busbar during the printing process.
This patented design and manufacturing process offer potential improvements in the efficiency and reliability of photovoltaic solar cells. By reinforcing the connection between the busbar and electrode pad with the extension line, the risk of disconnection or damage is reduced. The use of different pastes for the extension line and finger may also contribute to the overall performance of the solar cell. Further research and development may be needed to fully evaluate the practical application and commercial viability of this patented technology.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
