Ultrasonic Electrode Core Separator for Li-Ion Heat and Impurity Control
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Solution Overview
Problem
Lithium-ion batteries with solid structures face issues such as lithium metal crystal and impurity accumulation, limited electrolyte storage, heat dissipation challenges, and performance degradation in extreme temperatures, leading to safety hazards and reduced service life.
Innovation Solution
A composite module comprising ultrasonic electrode cores spaced apart on a separator body, creating gaps for electrolyte storage and heat dissipation, with ultrasonic cavitation effects to prevent impurity adhesion and accelerate ion movement, enhancing safety and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a solid structure battery core is used, then structural stability is improved, but space for accommodating lithium metal crystals and impurities is reduced
Solution Approach 1:
The battery core is divided into multiple layers with electrode plates, separators, and protective layers arranged in alternating sequences. This segmentation creates internal spaces within the layered structure that can accommodate lithium metal crystals and impurities while maintaining overall structural stability.
Solution Approach 2:
The protective layer is wrapped around the electrode plates, and the separator is positioned between electrode plates, creating nested structures. This nesting approach maximizes space utilization within the battery core, providing accommodation spaces for impurities while maintaining structural integrity.
2Strength
If a solid structure battery core is used, then structural integrity is improved, but electrolyte storage capacity is reduced
Solution Approach 1:
The separator is designed with a porous structure containing multiple small curved holes, which provides extensive surface area and internal volume for electrolyte storage. This porous structure allows the separator to hold significant electrolyte volume while maintaining its structural integrity and separation function.
Solution Approach 2:
The battery core adopts a wound coil structure transforming two-dimensional electrode plates into a three-dimensional cylindrical configuration. This dimensional transformation creates internal voids and spaces within the coil structure that can store electrolyte, significantly increasing electrolyte capacity without compromising structural strength.
3Ease of manufacture
If a solid structure battery core is used, then manufacturing simplicity is improved, but heat dissipation capability is reduced
Solution Approach 1:
The battery core structure creates fluid channels through the arrangement of electrode plates, separators, and protective layers. These channels allow electrolyte flow and heat transfer, enhancing heat dissipation capability while maintaining manufacturing simplicity through the standardized layered construction process.
Solution Approach 2:
The protective layer is pre-positioned to wrap around electrode plates before final assembly, and the separator is pre-cut with appropriate aperture patterns. These preliminary actions facilitate subsequent assembly steps and create built-in heat dissipation pathways, simplifying manufacturing while improving thermal management.
4Speed
If separator apertures are used for lithium ion transport, then ion conductivity is improved, but impurity accumulation and blockage risk increase
Solution Approach 1:
The protective layer acts as an intermediary between the separator and electrode plates, preventing direct contact between impurities and the separator apertures. This intermediary layer filters and redirects impurity flow, protecting the aperture structure from blockage while maintaining lithium ion transport efficiency through the separator.
Solution Approach 2:
The protective layer is positioned in advance to wrap around electrode plates, creating a protective barrier before impurities can accumulate and block separator apertures. This prior cushioning prevents harmful interactions between impurities and the ion transport pathways, ensuring long-term reliability.
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 design improves electrolyte storage, accelerates charging, enhances heat dissipation, and prevents impurity-induced hazards, thereby extending battery life and improving charging speed, especially in extreme conditions.
Implementation Method 1
the ultrasonic electrode cores mounted with the ultrasonic elements can create an ultrasonic cavitation effect such that the lithium metal crystals and the chemical impurities will not be bonded to the separator
Implementation Method 2
movement of the electrolyte can be accelerated by the ultrasonic cavitation effect, such that the charging speed is accelerated
Implementation Method 3
more spaces are formed inside the battery to increase the storage spaces for the electrolyte and to rapidly conducting the heat generated during operation of the battery to the external environment
Data Source
AI summary
A composite module, having a separator body, a plurality of first ultrasonic electrode cores, and a plurality of second ultrasonic electrode cores; the first ultrasonic electrode cores are positioned on an inner circumferential surface of the separator body and spaced apart with one another; the first ultrasonic electrode cores are integrally packaged with the separator body; one ends of the first ultrasonic electrode cores are connected in parallel through first conductive wires to form a first wiring terminal; the second ultrasonic electrode cores are positioned on an outer circumferential surface of the separator body and spaced part with one another; the second ultrasonic electrode cores are integrally packaged with the separator body; one ends of the second ultrasonic electrode cores are connected in parallel through second conductive wires to form a second wiring terminal.