Yiwei Lithium Energy Co., Ltd. has applied for a patent related to the control of black spots on lithium battery interfaces, aiming to address issues caused by improper negative pressure control that leads to the formation of black spots at the battery cell interface.
As of May 15, 2025, information from the National Intellectual Property Administration indicates that Yiwei Lithium Energy, headquartered in Huizhou, has submitted a patent application titled “Method and Device for Controlling Black Spots on Lithium Battery Interfaces, and Electronic Equipment,” with publication number CN119994255A, filed on January 2025.
The patent summary reveals that the invention outlines a method and device for controlling black spots on lithium battery interfaces, which falls within the lithium battery technology field. The control method includes the following steps: determining preset control conditions, using a formation measurement and blocking tool to simulate the battery cell, placing the tool in a formation cabinet for simulation testing to obtain actual test data. If this data meets the first control condition, an empty extraction test of the formation cabinet is conducted to gather actual empty extraction test data. If this data meets the second control condition, the battery cell is then placed in the formation cabinet for formation testing to obtain actual formation test data. Subsequently, it is verified whether this data meets the third control condition. If it does, the control of black spots on the lithium battery interface is deemed complete. This invention effectively resolves the technical issue of black spot formation at the battery cell interface due to inadequate negative pressure control.
According to Tianyancha data, Yiwei Lithium Energy Co., Ltd. was established in 2001 in Huizhou and primarily engages in wholesale activities, with a registered capital of CNY 2,045,721,497. The company has invested in 44 enterprises and participated in 194 bidding projects, with 285 trademark records and 3,558 patent records. Additionally, it holds 380 administrative licenses.
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