US 2025/0167277 A1Published application

Jelly-Roll Type Electrode Assembly and Secondary Battery Comprising Same

AssigneeLG Energy Solution, Ltd.

InventorSeyoung Jeong

Life of this patent

Estimating the term…

Loading patent…

Abstract

A jelly-roll type electrode assembly includes a disconnection prevention portion, whereby it is possible to prevent crack and deformation of the electrode assembly. The disconnection prevention portion is electrically connected to a first electrode current collector via a weld portion to provide an additional conductive passage, so it is possible to suppress an increase in resistance and improve battery stability even in the event of disconnection. The jelly-roll type electrode assembly can prevent local problems such as reduction in roundness and lithium precipitation due to formation of additional steps by adjusting positions of the disconnection prevention portion and the weld portion, and can minimize occurrence of additional cracks and deformation of the electrode assembly due to formation of fixed points. A secondary battery including the same is also provided.

Claims17

Dependent claims

A jelly-roll type electrode assembly in which a first electrode, a separator, and a second electrode are stacked and wound,

wherein the first electrode comprises a first electrode current collector;
a first electrode active material layer provided on at least one surface of the first electrode current collector;
a disconnection prevention portion provided on a surface of the first electrode current collector opposite to a surface facing a longitudinal end portion of the second electrode;
and a weld portion electrically connecting the first electrode current collector and the disconnection prevention portion,
wherein the second electrode comprises a second electrode current collector;
and a second electrode active material layer provided on at least one surface of the second electrode current collector, and
wherein both longitudinal end portions of the disconnection prevention portion do not coincide with the longitudinal end portion of the second electrode.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/841,516Filed 19 Sep 2023
Priority: KR 10-2022-013082012 Oct 2022
Published: 22 May 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

H01M 10/0431
Construction or manufacture in general: cells with wound or folded electrodes
H01M 10/0587
Construction or manufacture: of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes…
H01M 4/70
Carriers or collectors: characterised by shape or form
H01M 10/04
Secondary cells; Manufacture thereof: construction or manufacture in general

Family

No related US applications are recorded in the indexed filing history.

Timeline

Citations

Open elsewhere

Building an agent or pulling many patents? Use the API or MCP server instead of scraping pages. Get an API key