Filament Breaking Mesh for Battery Internal Shorting Mitigation
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Solution Overview
Problem
Internal shorts in high power density batteries, such as lithium-ion batteries, pose a safety risk due to rising temperatures and pressures, as external circuit protection is insufficient to mitigate electrochemical reactions driven by these conditions.
Innovation Solution
A system involving a filament breaking mesh within the battery, activated by sensors detecting internal shorting conditions, which uses a drive mechanism to break or pull metal filaments off electrodes, manufactured from non-conductive and reactive polymeric materials to disrupt internal shorting paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external circuit protection is used to isolate the battery, then external shorting is prevented, but internal shorts continue to produce electrochemical current and temperature rise
Solution Approach 1:
A filament-breaking mesh is introduced as an intermediary component between the electrodes. This mesh acts as a physical barrier that prevents filament formation and internal shorting while maintaining ionic conductivity for normal battery operation. The mesh mediates between the need for electrical isolation and the need for ionic transport.
Solution Approach 2:
The battery internal structure is segmented by introducing a mesh that divides the space between electrodes into regions where filaments cannot bridge. The mesh creates a segmented barrier that physically interrupts potential shorting paths while allowing electrolyte flow through its porous structure.
2Object-generated harmful factors
If a filament breaking mesh is introduced to break internal shorts, then internal shorting is reduced, but device complexity increases
Solution Approach 1:
The filament-breaking mesh serves multiple functions simultaneously: it acts as a physical barrier against filaments, maintains ionic conductivity for normal operation, and provides structural support within the battery. This multi-functionality reduces the need for additional separate components.
Solution Approach 2:
The mesh is designed with a porous structure that allows electrolyte penetration and ionic transport while maintaining mechanical integrity. The porosity enables the mesh to fulfill both barrier and conductor functions without requiring complex additional systems.
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
Effectively reduces internal shorts by physically breaking metal filaments, thereby mitigating temperature and pressure increases, enhancing battery safety by preventing electrochemical reactions that lead to thermal and pressure excursions.
Implementation Method 1
moving, by at least one drive mechanism, the filament breaking mesh, upon receiving at least one commanding signal. Further, the method involves breaking, with the filament breaking mesh, at least one filament present within the battery
Implementation Method 2
the sensing of at least one sensor comprises sensing temperature, sensing voltage, sensing impedance, and/or sensing pressure
Implementation Method 3
the sensing of at least one sensor comprises sensing temperature, sensing voltage, sensing impedance, and/or sensing pressure
Implementation Method 4
the separator is manufactured from at least one material to provide ionic conduction for current flow between the positive electrode and the negative electrode
Data Source
AI summary
The present disclosure teaches a method, system, and apparatus for the mitigation of internal shorting for improved battery safety. In one or more embodiments, the disclosed method for mitigating internal shorting in a battery involves sensing, with at least one sensor, an internal shorting condition of the battery. The method further involves producing, by at least one processor, at least one commanding signal to initiate motion of a filament breaking mesh. Also, the method involves moving, by at least one drive mechanism, the filament breaking mesh, upon receiving at least one commanding signal. Further, the method involves breaking, with the filament breaking mesh, at least one filament present within the battery.