Electrode Winding Layout for Faster Electrolyte Filling
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Solution Overview
Problem
The existing process of producing cylindrically wound electrochemical cells is slow due to the sealing of arrester flags over the electrode coil, which impedes the penetration of electrolyte, thereby slowing down the manufacturing process.
Innovation Solution
Designing an electrochemical cell with arrester flags bent on one end face and electrically connected to a current collector, providing a surface area free of arrester flags for electrolyte penetration, and arranging the current collector's electrolyte filling opening in this area to facilitate quicker filling without excessive lateral movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conductor tabs are rolled, crimped, or compressed over their entire surface to seal the end face of the electrode coil, then the sealing of the electrode coil is improved, but the penetration speed of electrolyte deteriorates
Solution Approach 1:
The end face of the electrode coil is designed with non-uniform structure: regions with conductor tabs provide sealing and electrical connection, while regions without conductor tabs provide open access for electrolyte penetration. This local differentiation allows simultaneous achievement of sealing and fast electrolyte filling.
2Reliability
If conductor tabs are rolled, crimped, or compressed over their entire surface, then the electrical connection is improved, but the manufacturing speed deteriorates
Solution Approach 1:
Conductor tabs are only processed (rolled, crimped, or compressed) in specific regions where they are present, leaving other regions open. This localized processing maintains electrical connection reliability while avoiding unnecessary processing time across the entire end face, thereby increasing manufacturing speed.
3Device complexity
If the electrolyte filling opening is arranged in a region with conductor tabs, then the structural compactness is improved, but the electrolyte filling speed deteriorates
Solution Approach 1:
The electrolyte filling opening is specifically positioned in a region without conductor tabs on the end face. This location provides direct access to the electrode coil interior without the need for lateral movement of electrolyte through sealed or obstructed areas, enabling rapid electrolyte filling while maintaining structural compactness.
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 allows for faster electrolyte penetration and filling of the electrochemical cell, significantly reducing manufacturing time while ensuring a fluid-tight connection to prevent electrolyte leakage.
Implementation Method 1
electrolyte can penetrate into the electrode coil more quickly at this point
Data Source
Figure 1~5
Figure 6~7
AI summary
The invention relates to an electrochemical cell (10) with an electrode winding (20) comprising a first and a second electrode, wherein at least one electrode has conductor tabs (46, 50, 52), at least some of which are bent over on a first end face of the electrode winding (20) and are electrically connected to a current collector (70), wherein at least one conductor-tab-free area (28, 30, 32) is provided on the first end face of the electrode winding (20) and the current collector (70) has an electrolyte filling opening (72, 74, 76) which is arranged in the area of the at least one conductor-tab-free area (28, 30, 32).