LONGi Green Energy has applied for patents related to silicon wafers, battery cells, and photovoltaic modules, aiming to reduce the risks of edge chipping and fragmentation. According to information from the National Intellectual Property Administration, LONGi Green Energy Technology Co., Ltd. has submitted a patent application titled “3363. A Silicon Wafer, Battery Cell, and Photovoltaic Module,” with publication number CN119855289A, filed on December 2024.
The patent abstract reveals that the invention pertains to a silicon wafer featuring a first surface, a second surface, and side surfaces in between. Each surface has two opposing first edges and two opposing second edges. One first edge is connected to two adjacent second edges via a first chamfer on the side surface, while the other first edge connects to two adjacent second edges through a second chamfer on the side surface of the silicon wafer. The projection length of the first chamfer is less than 5mm, and it is greater than or equal to the projection length of the second chamfer. The side surface where the second chamfer is located contains multiple first grooves, with the extension direction of these grooves forming an angle of 0° to 10° with the first surface of the silicon wafer.
The first grooves associated with the second chamfer effectively reduce the risks of edge chipping and fragmentation. When using the “water floating” method to remove film layers from the battery cells, the design minimizes cleaning dead zones around the second chamfer. Water flowing in front of the second chamfer is redirected by the first grooves to the sides, reducing liquid overflow.
According to data from Tianyancha, LONGi Green Energy Technology Co., Ltd., established in 2000 and based in Xi’an, primarily engages in wholesale operations. The company has a registered capital of approximately 757.8 million RMB. Through data analysis, it is noted that LONGi has invested in 35 companies and participated in 320 bidding projects, holding 201 trademark rights and 1,896 patents, along with 54 administrative licenses.
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