Nickel-Coated Electrode Lead for Stronger Battery Sealing
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Solution Overview
Problem
The interface between the electrode lead and the battery casing in electrochemical devices exhibits poor sealing strength, leading to electrolyte leakage and gas introduction/discharge issues, which existing technologies have been unable to adequately address.
Innovation Solution
An electrode lead with a metallic terminal featuring a nickel plating layer and a coating layer containing a polar group and surface irregularity structure, enhancing adhesion with the lead film through Van der Waals bonding and mechanical anchoring, while maintaining corrosion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the thickness of the lead film is increased to improve sealing strength between the lead film and the battery casing, then the sealing strength between lead film and battery casing is improved, but the adhesion between electrode lead and lead film cannot be improved due to technical limitations
Solution Approach 1:
The patent applies local quality by creating a surface irregularity structure specifically at the interface between the electrode lead and lead film. This localized structural modification enhances adhesion at the critical bonding interface without requiring changes to the overall lead film thickness or battery casing structure, thereby resolving the technical limitation mentioned in the contradiction.
Solution Approach 2:
The patent employs composite materials by combining the metallic electrode lead with a coating layer that has different surface properties. The coating layer with surface irregularity structure creates a composite interface that simultaneously improves adhesion to the lead film while maintaining the electrical and mechanical properties of the original electrode lead material.
2Device complexity
If conventional sealing methods are used, then the device structure remains simple, but the interface between electrode lead and battery casing shows poor sealing strength causing electrolyte leakage and gas introduction
Solution Approach 1:
The patent modifies only the surface properties of the electrode lead at the sealing interface through surface irregularity structure, rather than changing the entire device structure. This localized modification maintains overall structural simplicity while significantly improving sealing strength at the critical interface between electrode lead and battery casing.
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
The solution significantly improves the adhesion between the electrode lead and the lead film, preventing electrolyte migration and maintaining corrosion resistance, thereby enhancing the sealing integrity of electrochemical devices.
Implementation Method 1
enhancing adhesion with the lead film through Van der Waals bonding and mechanical anchoring
Implementation Method 2
enhancing adhesion with the lead film through Van der Waals bonding and mechanical anchoring
Implementation Method 3
maintaining corrosion resistance
Data Source
AI summary
The present disclosure relates to an electrode lead for an electrochemical device, including a nickel plating layer disposed on the surface of a metallic terminal, having a surface irregularity structure on the nickel plating layer, and including a polar group-containing coating layer. The present disclosure also relates to an electrochemical device including the electrode lead. The electrode lead for an electrochemical device provides increased binding force between the electrode lead and the lead film by increasing the contact area between the electrode lead and the lead film, while not causing damages upon the surface of the electrode lead.