Opposed Electrode Tab Assembly for Uniform Current Distribution
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Solution Overview
Problem
Existing secondary batteries face challenges in maintaining uniform current distribution, which affects their performance and efficiency.
Innovation Solution
The electrode assembly design includes specific configurations for positive and negative electrode tabs and sections, with defined orientations and connections to ensure uniform current distribution, and is housed in a case with terminals and connection members for efficient power transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional electrode assembly design with single tabs is used, then the structure is simple, but the current distribution is non-uniform
Solution Approach 1:
The electrode assembly is divided into multiple sections (first positive electrode section, second positive electrode section, first negative electrode section, second negative electrode section) with separate tabs for each section. This segmentation allows independent current collection from different regions, enabling uniform current distribution across the electrode plates while maintaining manageable structural complexity through modular organization.
2Reliability
If electrode tabs are extended in multiple directions, then current distribution uniformity is improved, but manufacturing precision requirements increase
Solution Approach 1:
The tabs are designed with asymmetric orientations relative to the electrode plates. The first positive electrode tab and second positive electrode tab extend in different directions (e.g., upward and downward), while the negative tabs extend oppositely. This asymmetric configuration balances the current collection from different regions of the electrode plates, achieving uniform current distribution while providing clear manufacturing guidelines for tab positioning.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design achieves uniform current distribution, enhancing the performance and efficiency of the secondary battery by optimizing power transfer and maintaining consistent energy delivery.
Implementation Method 1
generates energy through oxidation/reduction reactions when lithium ions are intercalated/deintercalated at the positive and negative electrodes
Data Source
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AI summary
An electrode assembly, a secondary battery, and a battery pack are disclosed. An electrode assembly includes one or more positive electrode plates, one or more negative electrode plates facing the one or more positive electrode plates in a first direction, a first positive electrode tab extending from a positive electrode plate of the one or more positive electrode plates and bent in the first direction, a second positive electrode tab extending from the positive electrode plate and bent in a direction opposite to the first direction, a first negative electrode tab extending from a negative electrode plate of the one or more negative electrode plates and bent in the direction opposite to the first direction, and a second negative electrode tab extending from the negative electrode plate and bent in the first direction.