Electrode Tab Layout for Uniform Current in Secondary Batteries
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Solution Overview
Problem
Existing lithium 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 within a case with terminals and connection members for efficient power transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional electrode tab configurations are used, then the battery structure is simple, but the current distribution is non-uniform
Solution Approach 1:
The electrode assembly is divided into multiple electrode sections (first, second, third sections) with tabs extending from different locations. Each tab connects to a specific electrode section, creating segmented current collection paths that distribute current more uniformly across the battery structure
Solution Approach 2:
The first and second tabs extend in opposite directions from the first electrode section, while the third tab extends from the second electrode section in a different orientation. This asymmetric arrangement optimizes current distribution by creating balanced electrical pathways that prevent localized current concentration
2Manufacturing precision
If electrode tabs are extended in multiple directions, then current distribution uniformity improves, but the manufacturing complexity increases
Solution Approach 1:
The battery is segmented into multiple electrode sections with dedicated tabs for each section. This segmentation allows independent optimization of current collection from different regions while maintaining a systematic assembly process that can be manufactured using standardized procedures
3Manufacturing precision
If multiple electrode sections are used, then current distribution improves, but the device complexity increases
Solution Approach 1:
The electrode assembly is divided into three distinct sections (first, second, and third electrode sections) with specific tab connections. This segmentation creates multiple current collection pathways that distribute current uniformly while maintaining a structured and organized assembly architecture
Solution Approach 2:
Each electrode section has specific tabs extending from particular locations (first tab from first section, second tab from first section in opposite direction, third tab from second section). This local quality optimization ensures that current is collected efficiently from each specific region, achieving overall uniform distribution
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 enhances the uniformity of current distribution, improving the performance and efficiency of the secondary battery.
Implementation Method 1
a positive electrode and a negative electrode including an active material capable of intercalating and deintercalating lithium ions
Implementation Method 2
generates energy through oxidation/reduction reactions when lithium ions are intercalated/deintercalated at the positive and negative electrodes
Data Source
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.