Electrode Assembly with Non-Coating Tabs for Battery Alignment
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Solution Overview
Problem
The existing electrode assemblies for secondary batteries are complex to assemble and align, which hinders efficient energy storage and discharge performance.
Innovation Solution
The electrode assembly consists of a positive electrode assembly with non-coating portions and tabs, a negative electrode assembly with non-coating portions and tabs, and a separator to insulate between them, allowing for easy assembly and alignment through methods like ultrasonic welding or riveting, and the use of integral or coating separators for enhanced insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional electrode assemblies are used, then energy storage and discharge performance can be achieved, but the assembly process becomes complex and alignment becomes difficult
Solution Approach 1:
The electrode assembly is divided into multiple electrode units, each with non-coating portions at specific positions. These segmented units are stacked alternately with separators, simplifying the overall assembly process while maintaining performance
Solution Approach 2:
Non-coating portions are pre-formed on the electrodes at specific positions before assembly. This preliminary structuring enables easier alignment and assembly of the electrode units during manufacturing
2Manufacturing precision
If traditional electrode assemblies are used, then electrical connectivity can be maintained, but alignment between electrodes becomes difficult
Solution Approach 1:
Non-coating portions are positioned asymmetrically on the electrodes (e.g., at specific ends or positions rather than uniformly distributed). This asymmetric positioning creates distinct alignment features that facilitate precise stacking and alignment of electrode units
Solution Approach 2:
The non-coating portions create visual contrast differences on the electrode surfaces, enabling easy visual identification and alignment during the assembly process
3Reliability
If separators are added for insulation, then electrical insulation is improved, but assembly complexity increases
Solution Approach 1:
Multiple separators are combined into a single integral separator structure that spans across multiple electrode units. This merging approach maintains the necessary insulation between positive and negative electrodes while reducing the number of separate components and simplifying assembly
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 configuration simplifies the assembly process, enhances alignment, and improves the energy storage and discharge performance of secondary batteries by ensuring effective insulation and electrical connectivity between electrodes.
Implementation Method 1
a separator disposed between each positive electrode and each negative electrode to insulate a region between the positive electrode and the negative electrode
Implementation Method 2
a positive electrode tab coupling all the positive electrode non-coating portions
Implementation Method 3
a negative electrode tab coupling all the negative electrode non-coating portions
Data Source
AI summary
An electrode assembly that includes a positive electrode assembly including a number of positive electrodes each having a positive electrode non-coating portion at a certain position, and a positive electrode tab coupling all the positive electrode non-coating portions, a negative electrode assembly including a plurality of negative electrodes each having a negative electrode non-coating portion at a certain position, and a negative electrode tab coupling all the negative electrode non-coating portions, and a separator disposed between each positive electrode and each negative electrode to insulate a region between the positive electrode and the negative electrode. The positive electrodes of the positive electrode assembly and the negative electrodes of the negative electrode assembly are stacked alternately.