LG Energy Solution Battery Separator Patent Granted
Summary
The USPTO has granted US Patent US12586868B2 to LG Energy Solution, Ltd. for a novel battery separator with enhanced adhesion and electrolyte affinity. This patent covers a separator for electrochemical devices, including a porous coating layer with multiple binder resins, aiming to improve battery performance and manufacturing processes.
What changed
The United States Patent and Trademark Office (USPTO) has granted patent US12586868B2 to LG Energy Solution, Ltd. for a new battery separator technology. The patent describes a separator for electrochemical devices that incorporates a porous coating layer with multiple types of binder resins, specifically including polar and acrylic binders with different glass transition temperatures. This design aims to improve adhesion between the electrode and the separator without requiring a separate adhesive layer, offering higher adhesion than conventional separators using fluorinated binder resins like polyvinylidene fluoride. The innovation also seeks to reduce interfacial resistance and improve battery output characteristics due to better electrolyte affinity.
This patent grant is primarily an intellectual property development for LG Energy Solution and does not impose new regulatory obligations on other entities. However, companies involved in battery manufacturing or research and development, particularly those using or developing separators for electrochemical devices, may find this patent relevant to their own innovation and patent landscape assessments. Compliance officers in the battery sector should be aware of this granted patent as it pertains to advancements in battery component technology.
Source document (simplified)
Separator including inorganic porous coating layer including polar binder and acrylic binder with different glass transition temperatures, electrochemical device, and method for manufacturing the same
Grant US12586868B2 Kind: B2 Mar 24, 2026
Assignee
LG ENERGY SOLUTION, LTD.
Inventors
Ji-Eun Kim, Sang-Young Lee, So-Mi Jeong, Ji-Young Seo, Yong-Hyeok Lee, Je-An Lee
Abstract
A separator for an electrochemical device provided with a porous coating layer including multiple types of binder resins, and a method for manufacturing the same. The separator has high adhesion between an electrode and the separator, even when any separate adhesive layer is not disposed on the surface of the separator. In addition, the separator has higher adhesion to an electrode, as compared to a separator using a fluorinated binder resin, such as polyvinylidene fluoride, used conventionally in the art. In addition, since the separator has no separate adhesive layer, it is possible to provide low interfacial resistance between the separator and an electrode. Further, the separator has high affinity to an electrolyte, as compared to a semi-crystalline polymer, such as a fluorinated binder resin, and thus improves the output characteristics of a battery.
CPC Classifications
H01M 50/446 H01M 50/491 H01M 50/46 H01M 50/449 H01M 10/0525
Filing Date
2021-04-06
Application No.
17917156
Claims
16
Named provisions
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