Fibrous Battery Lead Tab Segmentation for Flexible Connection
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Solution Overview
Problem
Fibrous secondary batteries face challenges in firmly connecting their lead tabs to external terminals without compromising energy transmission efficiency due to the lead tab's low rigidity and deformation, which affects energy density and suitability for curved or flexible electronic devices.
Innovation Solution
A fibrous secondary battery design featuring a lead tab connected using the same conductive fibers as the fibrous electrode, with a connecting portion wound around the electrode, fastening holes, guide grooves, and a cover made of the same material, ensuring stable and efficient energy transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the lead tab is made of thin conductive fiber to enable easy deformation and flexibility, then the fibrous secondary battery can be curved or deformed, but the rigidity of the lead tab becomes small and it cannot be firmly connected with an external terminal
Solution Approach 1:
The lead tab is divided into two distinct parts: a flexible body portion made of thin conductive fiber for maintaining flexibility and curvability, and a separate connection portion with increased rigidity for firm connection to external terminals. This segmentation allows each part to fulfill its specific functional requirement independently.
Solution Approach 2:
Different regions of the lead tab are given different physical properties: the body portion maintains thin conductive fiber structure for flexibility, while the connection portion is designed with enhanced rigidity through structural features like extended thickness or reinforcement. This local differentiation resolves the contradiction between overall flexibility and local connection strength.
2Quantity of substance
If the lead tab is made of thin conductive fiber to downsize and decrease weight, then energy density per unit volume increases, but the connection ability to external terminal deteriorates
Solution Approach 1:
The lead tab structure is segmented into a thin body portion for high energy density and a reinforced connection portion for reliable terminal connection. This allows the majority of the lead tab to remain thin while only the connection area requires additional structural support.
Solution Approach 2:
The connection portion may incorporate composite structures combining the conductive fiber with additional reinforcing materials or multi-layer constructions that provide both electrical conductivity and mechanical strength for reliable connection without significantly increasing the overall mass of the lead tab.
Data Source
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AI summary
The present invention provides a lead tap of a fibrous secondary battery which includes: a fibrous electrode made by conductive fibers; and a lead tap connected with the fibrous electrode, in which the lead tap may be connected with the fibrous electrode by connecting fibers that are the same materials as the conductive fibers of the fibrous electrode or by the conductive fibers of the fibrous electrode. The lead tap has: a connecting portion connected with the fibrous electrode; and a protruding portion protruding from the connecting portion and connected with an external terminal of an electronic device, in which the connecting portion of the lead tap may be wound around the connecting fibers or the conductive fibers of the fibrous electrode and connected with the fibrous electrode.