Battery Separator Conductive Layer for Cycle Life Extension
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Solution Overview
Problem
Secondary batteries, such as lead-acid batteries, suffer from low cycle life due to deterioration of the positive electrode conductor caused by corrosion during the electrochemical process, leading to premature battery failure.
Innovation Solution
A battery separator with a conductive layer made of materials like silver, lead, or carbon nanotubes is used, which is adapted to contact the positive electrode, providing a new route for current flow and acting as a corrosion-resistant conductor when the original conductor deteriorates, thereby extending the cycle life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the positive electrode conductor is made of traditional grid material, then it provides current flow path, but it deteriorates from corrosion during electrochemical process
Solution Approach 1:
The patent employs a sacrificial conductive layer that can be replaced or regenerated. The conductive particles in the separator provide a renewable conduction path that can withstand corrosion better than traditional grid materials, effectively serving as a disposable or regenerable conductor that extends battery life
Solution Approach 2:
The patent changes the material parameters of the conductor by using conductive particles with different chemical stability and corrosion resistance properties compared to traditional grid materials, thereby improving the durability and cycle life of the positive electrode
2Power
If more current flows through the positive electrode conductor, then the battery power increases, but the positive electrode conductor deteriorates faster
Solution Approach 1:
The patent applies local quality by creating distributed conduction pathways throughout the separator using dispersed conductive particles. This distributes the current load across multiple localized paths rather than concentrating it in a single grid structure, reducing the stress and corrosion rate on any single conductor region while maintaining overall high power capability
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 layer reduces the deterioration rate of the positive electrode conductor and can function as a replacement when the original conductor fails, significantly extending the battery's cycle life and maintaining capacity.
Implementation Method 1
The conductive layer is adapted to be in contact with the positive electrode of the battery thereby providing a new route of current to and from the positive electrode
Implementation Method 2
a battery separator must permit an ionic current between the positive and negative electrodes with the least possible resistance
Data Source
AI summary
A battery separator for extending the cycle life of a battery has a separator and a conductive layer. The conductive layer is disposed upon the separator. The conductive layer is adapted to be in contact with the positive electrode of the battery thereby providing a new route of current to and from the positive electrode.