US 11923498

US Patent 11923498, titled "Lithium-ion battery having desirable safety performance," was issued on March 5, 2024, to Ningde Amperex Technology Ltd.. The patent was filed on May 17, 2022, and lists Tao Tao and Ming liang Mo as the inventors.

Abstract:
The patent describes a lithium-ion battery designed for improved safety. It includes a positive plate with a positive film, and a negative plate with a negative film, separated by a separator, and containing an electrolyte. Both the positive and negative films feature recesses to accommodate their respective leads (positive and negative leads) which are soldered within these recesses. A key safety feature involves a first insulating glue layer on the top and bottom surfaces of the positive lead. Additionally, a second insulating glue layer is applied to the surface of the positive film that corresponds to the negative lead's recess.

Independent Claims Overview:

• Independent Claim 1: This claim describes a lithium-ion battery comprising a positive electrode with a positive current collector and an active material layer (containing LiCoO2) that has a first recess for a positive lead. It also includes a negative electrode with a negative current collector and an active material layer (containing graphite or silicon) with a second recess for a negative lead. A separator is placed between the electrodes, and the battery contains an electrolyte. Crucially, a first insulating glue layer is present on the top surface of the positive lead. Furthermore, a second insulating glue layer is pasted on the surface of the positive electrode active material layer that is opposite to the second recess (across the separator), with this second glue layer having a width and length larger than that of the second recess.

• Independent Claim 9: This claim also details a lithium-ion battery with a positive electrode (current collector and active material layer with a first recess for a positive lead) and a negative electrode (current collector and active material layer with a second recess for a negative lead), a separator, and an electrolyte. It specifies that a first insulating glue layer is located at a first position on the top surface of the positive lead. A second insulating glue layer is pasted at a second position on the positive electrode active material layer, corresponding to the negative recess across the separator, and its width and length are larger than that of the second recess. Additionally, a third location on the positive current collector (opposite the side where the positive lead is covered by another first insulating glue layer) is covered with an insulating layer.

• Independent Claim 17: This independent claim describes a lithium-ion battery with a positive electrode (current collector and active material layer with a first recess for a positive lead) and a negative electrode (current collector and active material layer with a second recess for a negative lead), a separator, and an electrolyte. It states that a first insulating glue layer is provided at a first location on the top surface of the positive lead. A second insulating glue layer is pasted at a second location on the surface of the positive electrode active material layer that is opposite to the second recess (across the separator), and this second glue layer has a width and length greater than that of the second recess.

Legal Status and Docket Information:
As of April 26, 2026, US Patent 11923498 is active. Litigation is associated with the patent family, including a US case filed in the Texas Eastern District Court, and a PTAB (Patent Trial and Appeal Board) case, IPR2025-00389, which is currently pending and instituted. No specific dockets for US Patent 11923498 in the CAFC for 2026 were found in the provided search results.