Electrode Tab Protection Layer for Battery Pack Strength
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Solution Overview
Problem
Secondary batteries, particularly those used in mobile devices and electric vehicles, face challenges in reinforcing the strength of electrode tabs, which can lead to mechanical stress and potential electrical failures.
Innovation Solution
The electrode assembly incorporates a protection layer on at least one surface of each electrode tab, made from materials like lamination tape, polymer coatings, or binders, to enhance the strength and durability of the tabs while maintaining their functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a protection layer is added to the electrode tab surface, then the strength and durability of the tab is improved, but the device complexity and manufacturing complexity increase
Solution Approach 1:
The patent applies a thin film protection layer (lamination tape or polymer coating) on the electrode tab surface. This thin film structure provides mechanical strength and durability enhancement without significantly increasing device complexity, as it maintains a simple layered structure that is easy to integrate into the existing electrode assembly.
Solution Approach 2:
The protection layer is formed using composite material structures, such as laminated tapes or polymer coatings combined with electrode materials. This composite approach enhances the mechanical properties of the electrode tab while maintaining manufacturing feasibility through established coating and lamination techniques.
2Reliability
If a protection layer is formed on the electrode tab, then the reliability is improved by reducing mechanical stress and electrical failures, but the ease of manufacture deteriorates
Solution Approach 1:
The protection layer is applied in advance during the electrode assembly manufacturing process, before the tabs are subjected to mechanical stress or electrical connections. This preliminary protection prevents damage during subsequent handling, assembly, and operation, thereby improving reliability without requiring additional manufacturing steps after assembly.
Solution Approach 2:
The protection layer modifies the surface parameters of the electrode tab (such as surface coating composition and thickness) to enhance mechanical strength and electrical stability. These parameter changes are achieved through controlled coating processes that maintain compatibility with existing manufacturing parameters and tolerances.
Data Source
AI summary
The present invention relates to an electrode assembly and a battery pack having the same, which can reinforce strength of an electrode tab by a protection layer formed on at least one surface of each of a plurality of electrode tabs. The electrode assembly includes a first electrode plate having a plurality of first electrode tabs extending and protruding to one side, a second electrode plate having a plurality of second electrode tabs extending and protruding to one side, and a separator interposed between the first electrode plate and the second electrode plate. The first electrode plate may further include a first protection layer formed on one surface of each of the plurality of first electrode tabs.