Electrode Assembly Tab Compaction Using Rotating Blade Geometry
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Solution Overview
Problem
Existing apparatuses for processing secondary battery electrode assemblies face challenges in compacting base material tabs efficiently, particularly in accommodating varying diameters and ensuring proper alignment and movement of blades for effective processing.
Innovation Solution
The apparatus features a vertical plate and a rotatable plate with blades of varying diameters, where the blades' ends are angled to correspond to 360°, allowing for adjustable central area processing, coupled with a gear system for linear movement and guide holes for precise alignment, enabling the compaction of base material tabs by changing the blade positions based on rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If blades are used to compact base material tabs, then the protruding height of tabs is reduced, but the device complexity increases due to the need for precise blade positioning and rotation mechanisms
Solution Approach 1:
The base material tab processing is divided into multiple blade elements (first blade, second blade, third blade, fourth blade) that work in sequence. Each blade is positioned at a specific angle (e.g., 30 degrees apart) to progressively compact the tab, breaking down the complex compaction task into simpler, manageable stages that reduce the need for highly complex positioning mechanisms
Solution Approach 2:
The apparatus employs a rotatable plate that can rotate to adjust the angular position of blades relative to the electrode assembly. This dynamic adjustment allows the same blade configuration to process tabs of different diameters and positions, reducing device complexity by using one adaptable mechanism rather than multiple fixed mechanisms
2Adaptability or versatility
If the apparatus is designed to accommodate varying diameters of electrode assemblies, then the adaptability is improved, but the manufacturing precision requirements increase for blade alignment and guide holes
Solution Approach 1:
The rotatable plate serves multiple functions: it positions blades for different electrode assembly diameters, adjusts blade angular positions, and accommodates various tab sizes. This universal component replaces what would otherwise require multiple dedicated fixtures, improving adaptability while the guide holes provide consistent reference points that simplify manufacturing precision requirements
Solution Approach 2:
Guide holes are pre-positioned on both the vertical plate and rotatable plate at specific angles (e.g., 30 degrees apart) before assembly. These pre-positioned guide holes establish precise reference points that automatically align blades correctly when the rotatable plate is rotated to the appropriate position, reducing manufacturing precision requirements during the actual blade alignment process
3Adaptability or versatility
If the central area of blades is made variable in diameter, then the processing capability for different tab sizes is improved, but the ease of manufacture decreases
Solution Approach 1:
Instead of manufacturing blades with variable diameters, the invention uses a rotatable plate mechanism that dynamically adjusts the effective working diameter by rotating to different angular positions. The blades themselves maintain a fixed, simple geometry that is easy to manufacture, while the rotation provides the variable processing capability needed for different tab sizes
Data Source
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AI summary
Provided is an apparatus for processing an electrode assembly of a secondary battery, which is capable of easily compacting a base material tab of a battery. An apparatus for processing a base material tab protruding from a cylindrical electrode assembly to one surface includes a vertical plate provided in a second direction perpendicular to a first direction that is a longitudinal direction of the electrode assembly, a rotatable plate provided as a planar plate parallel to the vertical plate and coupled to be rotatable relative to the vertical plate, and a plurality of blades coupled between the vertical plate and the rotatable plate. Each of the blades has a variable diameter in a central area defined by ends according to the relative rotation of the rotatable plate to process the base material tab of the electrode assembly.