Electrode Sheet Marking Using Shielding Members Instead of Laser Scoring

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Solution Overview

Problem

The electrode assembly manufactured by electrode sheets after marking in prior art tends to have a poorer performance due to the formation of a heat-affected zone during laser marking.

Innovation Solution

A marking device comprising an attachment mechanism, a coating mechanism, and a stripping mechanism is used to attach shielding members to the base material, prevent coating in the marking area, and then detach the shielding members to form scores, thereby avoiding the use of laser marking and its associated heat-affected zone.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If laser marking is used to make scores on electrode sheets, then marking can be achieved, but a heat-affected zone is formed on the coating layer which deteriorates electrode assembly performance

Engineering Contradiction:

Improvemarking precisionVSAvoidheat-affected zone

Core Design Contradiction:

Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the laser marking system with a mechanical marking system consisting of a pressing device that applies mechanical pressure to the electrode sheet through a mold. This substitution eliminates the thermal field of laser marking and replaces it with a mechanical field, thereby avoiding the formation of a heat-affected zone on the coating layer while still achieving precise score marking on the electrode sheet.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Object-affected harmful factors

If a marking device with attachment, coating, and stripping mechanisms is used, then heat-affected zone is avoided, but device complexity increases

Engineering Contradiction:

Improveheat-affected zoneVSAvoidmarking device structure

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The marking device is segmented into three independent functional modules: an attachment mechanism for securing the electrode sheet, a pressing mechanism for forming the scores, and a stripping mechanism for removing the mold. This segmentation allows each module to perform its specific function efficiently while maintaining overall system manageability despite the increased complexity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The mold serves multiple functions: it acts as a shielding member to define the marking area, a pressing tool to form the scores, and a template for precise positioning. This multi-functionality reduces the need for additional separate components, thereby managing device complexity while achieving the desired marking without heat-affected zone.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20250070114A1Marking device and lamination manufacturing system

Publication Date: 2025.02.27 CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED

AI summary

Provided are a marking device and a lamination manufacturing system. The marking device includes an attachment mechanism, a coating mechanism, and a stripping mechanism, wherein the attachment mechanism is configured to attach shielding members to a marking area of a base material; the coating mechanism is arranged downstream of the attachment mechanism along a conveying direction of the base material, and the coating mechanism is configured to coat the base material; and the stripping mechanism is arranged downstream of the coating mechanism along the conveying direction, and the stripping mechanism is configured to detach the shielding members from the base material to form scores on the marking area.