Coiled Capacitor With Flexible Multilayer Tape
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Solution Overview
Problem
Conventional capacitors face limitations in achieving high volumetric and mass density for energy storage due to low dielectric constant and breakdown strength, leading to reduced energy density and shortened lifespan at elevated temperatures.
Innovation Solution
A coiled capacitor design utilizing a flexible multilayered tape with specific layer configurations, including a high permittivity energy storage material and metal layers, to achieve enhanced dielectric properties and low carrier substrate usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional polymer film dielectric materials are used with sufficient thickness to sustain operating voltage, then the capacitor can maintain structural integrity and electrical performance, but the large thickness reduces energy storage density
Solution Approach 1:
The patent employs ultrathin dielectric films (3-10 nm) instead of conventional thick polymer films, achieving both high reliability and high energy density. The thin film technology enables sufficient voltage sustenance at dramatically reduced thickness, directly resolving the contradiction between structural integrity and energy storage density.
Solution Approach 2:
The patent uses composite dielectric structures including metal oxide layers (HfO2, SiO2) combined with polymer films, creating multilayer composite capacitors. These composite materials provide both the mechanical integrity needed for reliability and the high permittivity required for high energy density, simultaneously addressing both requirements.
2Volume of stationary object
If the dielectric constant is increased to reduce capacitor size, then volumetric energy density improves, but dielectric breakdown strength may be compromised
Solution Approach 1:
The patent employs composite dielectric structures including metal oxide layers (HfO2, SiO2) combined with polymer films, creating multilayer composite capacitors. These composite materials provide both the mechanical integrity needed for reliability and the high permittivity required for high energy density, simultaneously addressing both requirements.
Solution Approach 2:
The patent utilizes dielectric materials with dramatically increased permittivity values (κ=100-10,000) compared to conventional polymers (κ<5), such as metal oxides and ceramic materials. This parameter change in dielectric constant enables significant size reduction while maintaining or improving breakdown strength through careful material selection and thin film engineering.
3Reliability
If thin metal films are used to clear shorts in polymer dielectric, then capacitor lifetime is extended and catastrophic failure is minimized, but material costs increase
Solution Approach 1:
The patent employs ultrathin dielectric films (3-10 nm) instead of conventional thick polymer films, achieving both high reliability and high energy density. The thin film technology enables sufficient voltage sustenance at dramatically reduced thickness, directly resolving the contradiction between structural integrity and energy storage density.
4Ease of manufacture
If conventional polymer dielectric materials are used, then manufacturing is simplified, but performance degrades at temperatures exceeding 100-150° C.
Solution Approach 1:
The patent employs composite dielectric structures including metal oxide layers (HfO2, SiO2) combined with polymer films, creating multilayer composite capacitors. These composite materials provide both the mechanical integrity needed for reliability and the high permittivity required for high energy density, simultaneously addressing both requirements.
Solution Approach 2:
The patent utilizes dielectric materials with dramatically increased permittivity values (κ=100-10,000) compared to conventional polymers (κ<5), such as metal oxides and ceramic materials. This parameter change in dielectric constant enables significant size reduction while maintaining or improving breakdown strength through careful material selection and thin film engineering.
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 solution significantly increases volumetric and mass density of energy storage, improves reliability, and maintains performance at high temperatures, reducing material costs while extending the lifespan of capacitors.
Implementation Method 1
a high permittivity energy storage material
Data Source
AI summary
The present disclosure provides a coiled capacitor comprising a coil formed by a flexible multilayered tape, and a first terminating electrode and a second terminating electrode which are located on butts of the coil. The flexible multilayered tape contains the following sequence of layers: first metal layer, a layer of a plastic, second metal layer, a layer of energy storage material. The first metal layer forms ohmic contact with the first terminating electrode and the second metal layer forms ohmic contact with the second terminating electrode. The energy storage material comprises material selected from the list comprising rylene fragments, doped oligoaniline and p-oligo-phenylene, supramolecular structures, colloidal composite with dispersion (suspension) of electro-conductive anisometric particles in an insulator matrix, material comprises a surfactant.