Battery Cap Plate Conductive Pathway for Electrochemical Stability
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Solution Overview
Problem
Existing batteries face challenges in achieving electrochemical stability at the terminal and cap plate interface due to insulation materials like thermoplastics, which can lead to erosion and degradation.
Innovation Solution
Incorporating an electrically conductive pathway component, composed of a polymeric material and electrically conductive filler, to facilitate charge transfer between the terminal and cap plate, ensuring electrochemical stability through a passivation layer formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an insulation layer made of thermoplastic is used between the terminal and cell closure, then electrical insulation is provided, but electrochemical stability deteriorates due to erosion and degradation
Solution Approach 1:
The patent changes the electrical conductivity parameter of the insulation layer by incorporating conductive fillers (carbon black, metal particles, or conductive polymers) into the thermoplastic matrix. This creates a semi-conductive or conductive insulation layer that allows charge transfer to maintain electrochemical stability while retaining insulation properties. The conductivity parameter is adjusted by varying filler type, amount, and distribution to resolve the contradiction between insulation and electrochemical stability.
Solution Approach 2:
The patent creates a composite material system by combining thermoplastic polymer matrix with electrically conductive fillers. The composite structure provides both the mechanical and insulating properties of the polymer and the electrical conductivity needed for electrochemical stability. This composite approach allows simultaneous achievement of insulation function and electrochemical stability, resolving the contradiction between these two requirements.
2Reliability
If a conductive pathway component is added to enable charge transfer, then electrochemical stability improves, but device complexity increases
Solution Approach 1:
The patent merges the insulation layer and conductive pathway functions into a single integrated component. The insulation layer itself is made conductive through filler incorporation, eliminating the need for separate insulation and conductive pathway components. This merging reduces device complexity while maintaining both insulation and electrochemical stability functions.
Solution Approach 2:
The insulation layer is designed to perform multiple functions simultaneously: electrical insulation, charge transfer conduit, and electrochemical stabilization. By making the insulation layer semi-conductive or conductive, it becomes a multi-functional component that serves both insulating and conductive purposes, reducing the need for additional components and simplifying the overall device structure.
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 conductive pathway component stabilizes the cap plate, preventing erosion and degradation by allowing charge transfer, thereby enhancing the battery's electrochemical stability.
Implementation Method 1
an electrically conductive pathway component in electrical contact with the lithium-ion battery cap plate, wherein electrically conductive pathway component may be slightly or sufficiently conductive to allow charge transfer between the terminal and the cap plate
Data Source
AI summary
Disclosed is a product that may including a lithium-ion battery cap plate comprising a metal, and an electrically conductive pathway component in electrical contact with the lithium-ion battery cap plate, wherein electrically conductive pathway component may be slightly or sufficiently conductive to allow charge transfer between the terminal and the cap plate to provide electrochemical stability to the cap plate.