Winding-Type Stacked Condenser Body for High Capacitance
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Solution Overview
Problem
Current condensers, such as film and stacked ceramic condensers, face challenges in achieving high electrostatic capacitance and high voltage withstand while being miniaturized and easy to manufacture, with difficulties in controlling capacitance and voltage withstand due to limitations in dielectric materials and manufacturing processes.
Innovation Solution
A winding-type stacked body for a condenser is developed, comprising a metal layer and a dielectric layer without a plastic film, where the dielectric layer is formed on the metal layer, and the structure is wound to achieve high electrostatic capacitance and voltage withstand, allowing for the selection of materials for optimal permittivity and dielectric loss tangent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a polypropylene film is used as a dielectric to achieve low dielectric loss tangent, then dielectric loss is reduced, but electrostatic capacitance becomes insufficient due to very low permittivity
Solution Approach 1:
The patent uses a composite structure combining a polypropylene film (for low dielectric loss) with a high permittivity ceramic layer (for high capacitance). The ceramic layer is formed on one surface of the polypropylene film, creating a composite dielectric structure that achieves both low loss tangent and high electrostatic capacitance simultaneously.
2Quantity of substance
If the polypropylene film is stretched into an ultra thin film to increase electrostatic capacitance, then capacitance increases, but the film becomes susceptible to blocking and breakdown by introversion, making it difficult to handle in manufacturing
Solution Approach 1:
The patent forms a high permittivity ceramic layer on the polypropylene film surface, creating a composite structure that achieves high capacitance without requiring ultra-thin stretching of the polypropylene film itself, thus avoiding handling difficulties and manufacturing defects.
Solution Approach 2:
The patent changes the dielectric structure from a single homogeneous polypropylene film to a layered composite structure with different dielectric properties, allowing optimization of both capacitance and manufacturability through parameter variation in layer thickness and material composition.
3Quantity of substance
If a stacked ceramic condenser is used to achieve high permittivity, then electrostatic capacitance increases, but control over capacitance and voltage withstand becomes difficult due to material limitations
Solution Approach 1:
The patent creates a composite dielectric structure combining polypropylene film and ceramic layer, where the thickness and permittivity of each layer can be independently adjusted to precisely control the overall capacitance and voltage withstand characteristics, providing greater design flexibility than pure ceramic condensers.
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 results in a condenser with electrostatic capacitance per unit area increased by 100 times, ease of handling and manufacturing, and the ability to achieve desired permittivity and low dielectric loss tangent, addressing the limitations of existing technologies.
Implementation Method 1
a dielectric layer B1 and B2, the first dielectric layer B1 and the second dielectric layer B2 facing each other, wound around a winding axis in an alternating manner with the first metal layer A1 and the second metal layer A2
Implementation Method 2
the electrostatic capacitance C[F] of the condenser is expressed as the following equation 1, in which the electrode area is A[m2], the permittivity of the dielectric is ε[F/m], and the distance between the electrodes is 1[M]
Implementation Method 3
high voltage withstand and low loss (tan σ=dielectric loss tangent) is required for the film condenser
Data Source
AI summary
The purpose of the present invention is to provide a winding-type stacked body for a condenser capable of realizing a high electrostatic capacitance and a high degree of withstand voltage. The purpose is accomplished by a winding-type stacked body for a condenser, comprising a metal layer and a dielectric layer, wherein the dielectric layer exists on the metal layer, two metal layers having the dielectric layers constitute a pair and are stacked and wound to configure the winding-type stacked body, which comprises no plastic film.