Cylindrical Electrode Assembly With Asymmetric Tabs for Faster Cell Assembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The assembly of existing electrode assemblies into battery shells is inefficient, which hinders the improvement of assembly efficiency and reliability of battery cells.
Innovation Solution
The electrode assembly design includes tabs with specific surface area and conductivity ratios, arranged in a sector ring shape, allowing for easier identification and connection to output poles, reducing the risk of short circuits, and optimizing space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If tabs are arranged at the same end of the electrode assembly, then space utilization is improved and energy density is increased, but tab identification and assembly accuracy deteriorate
Solution Approach 1:
The patent applies asymmetry by making the first tab and second tab have different surface areas. The first tab has a larger surface area than the second tab, creating an asymmetric configuration that allows easy visual identification during assembly while both tabs are located at the same end of the electrode assembly. This asymmetric design resolves the contradiction by enabling both compact space utilization and accurate assembly identification.
2Productivity
If tab surface areas are made different, then tab identification is improved and assembly efficiency is increased, but manufacturing complexity increases
Solution Approach 1:
The patent applies local quality by varying the surface areas of specific tabs (first tab and second tab) while keeping other parts of the electrode assembly uniform. Only the tab dimensions are modified to create the area difference, leaving the rest of the electrode structure unchanged. This localized modification improves assembly efficiency without significantly increasing overall manufacturing complexity.
3Reliability
If tabs with different conductivities are used, then current distribution is optimized, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies parameter changes by modifying the conductivity parameter of different tabs. The first tab and second tab are designed with different conductivity values, allowing optimized current distribution across the electrode assembly. This parameter variation enables better electrical performance while the conductivity differences are achieved through standard material selection and manufacturing processes.
Data Source
AI summary
The present application provides an electrode assembly, a battery cell, a battery and an electrical apparatus. The electrode assembly includes a main body part, a first tab and a second tab. The main body part is cylindrical. The polarities of the first tab and the second tab are opposite, the first tab and the second tab are arranged at the same end of the main body part along an axial direction of the main body part, and the electrical conductivity of the first tab is smaller than the electrical conductivity of the second tab. Along the axial direction of the main body part, the first tab has a first surface away from the main body part, and the second tab has a second surface away from the main body part, the area of the first surface being larger than the area of the second surface.