Electrode assembly three-dimensional
The double separation membrane structure with thermal fusion and sealing in the electrode assembly addresses manufacturing inefficiencies and safety issues, enhancing stability and safety by preventing short circuits and air contact.
JP2026521747APending Publication Date: 2026-07-01LG ENERGY SOLUTION LTD
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- LG ENERGY SOLUTION LTD
- Filing Date
- 2024-12-17
- Publication Date
- 2026-07-01
AI Technical Summary
Technical Problem
Conventional electrode assemblies, particularly stack-and-fold types, face challenges in manufacturing efficiency, susceptibility to short circuits due to separator membrane shrinkage, and ignition risks from venting phenomena, leading to battery instability and safety issues.
Method used
A double separation membrane structure with a first electrode positioned between folded rectangular layers, sealed by thermal fusion, and a second electrode separated by the membrane, with a sealing member to prevent contact and air ingress, enhancing manufacturing efficiency and stability.
Benefits of technology
The design prevents short circuits and suppresses battery ignition by sealing the membrane, ensuring stable operation and easy assembly.
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Smart Images
Figure 2026521747000001_ABST
Abstract
An electrode assembly is provided. An electrode assembly according to one aspect of this specification includes an electrode-separation membrane assembly comprising a double separation membrane, each layer of which is rectangular, and a first electrode positioned between the double separation membranes in a rectangular shape extending in a direction corresponding to the double separation membranes; and a second electrode separated from the first electrode by the separation membrane, wherein at least a portion of the edge region of the double separation membranes is heat-fused with the first electrode positioned between the double separation membranes, the heat-fused electrode-separation membrane assembly is folded in a zigzag shape along its longitudinal direction, and the second electrode is positioned between each layer of the folded and stacked electrode-separation membrane assembly.
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