Secondary Battery Electrode Cutting Path for Damage-Free Corners

Solution Overview

Problem

The manufacturing process of atypical-shaped secondary batteries often results in electrode damage due to issues with mold movement, leading to defects during the cutting process.

Innovation Solution

A method involving two cutting steps is employed, where the first and second cutting lines form closed curves, intersecting at a tangent, with one straight line connected to a curved line, ensuring the electrodes maintain a smooth corner and minimize damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If a mold is used to cut the electrode to manufacture atypical-shaped secondary batteries, then the electrode can be formed into the desired shape, but the electrode may be damaged due to undesirable movement of the mold or electrode during cutting

Engineering Contradiction:

Improveelectrode shapeVSAvoidelectrode integrity

Core Design Contradiction:

ShapeVSReliability

Solution Approach 1:

The cutting line is designed to include only curved lines without any straight lines or angular corners. This curvature design ensures that when the mold cuts along the cutting line, the electrode forms smooth rounded corners instead of sharp angles, which prevents stress concentration and reduces the risk of electrode damage during subsequent handling and assembly processes

Inventive Principle:

Principle #14Spheroidality (Curvature)

2Shape

If the cutting line includes angular corners, then the electrode can be formed with sharp edges, but the electrode is more prone to damage during accommodation in the exterior

Engineering Contradiction:

Improveelectrode edge sharpnessVSAvoidelectrode damage risk

Core Design Contradiction:

ShapeVSObject-affected harmful factors

Solution Approach 1:

The cutting line is designed to include only curved lines without any straight lines or angular corners. This curvature design ensures that when the mold cuts along the cutting line, the electrode forms smooth rounded corners instead of sharp angles, which prevents stress concentration and reduces the risk of electrode damage during subsequent handling and assembly processes

Inventive Principle:

Principle #14Spheroidality (Curvature)

Data Source

PatentUS12592374B2Electrode for secondary battery and method for manufacturing the same

Publication Date: 2026.03.31 LG ENERGY SOLUTION LTD

AI summary

An electrode for a secondary battery and a method for manufacturing the electrode are disclosed. According to an embodiment, a first cutting line and a second cutting line, along which an electrode sheet is cut, may cross each other to form a crossing area on the electrode sheet, and in the crossing area, the first cutting line may be formed as a straight line, and one end of the straight line may be connected to a curved line constituting a portion of the first cutting line, wherein the straight line may be connected to the curved line by a tangent line.