Capacitor Holder for Compact Onboard Power Source Thermal Management
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Solution Overview
Problem
Conventional onboard power supply devices face challenges in minimizing size due to the need to separate heat-generating components from capacitors to prevent thermal degradation, leading to increased volume and area requirements.
Innovation Solution
The use of a holder with a base part, holding parts, and a fixing part that securely fixes capacitors to a mounting board, where the holding parts act as a heat spreader and propagation path, allowing heat-generating components to be positioned close to capacitors while preventing concentrated heat propagation and ensuring uniform degradation of capacitors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heat-generating components are separated from capacitors, then thermal degradation of capacitors is prevented, but the device size increases
Solution Approach 1:
The holder is divided into multiple holding parts, each independently holding a capacitor. This segmentation allows capacitors to be positioned in a bundled configuration, reducing the overall device volume while maintaining thermal separation through the holder structure's heat spreading capability.
Solution Approach 2:
The holder acts as an intermediary component between the capacitors and the heat-generating components. It provides a bundled holding structure that facilitates heat spreading from concentrated sources, enabling closer positioning of heat-generating components while protecting capacitors from thermal degradation.
2Volume of stationary object
If heat-generating components are positioned close to capacitors, then device size is reduced, but concentrated heat propagation degrades capacitors non-uniformly
Solution Approach 1:
The holder structure provides localized heat management by bundling capacitors in a configuration that promotes uniform heat distribution. Each holding part is positioned to ensure equitable heat propagation paths, creating local thermal equilibrium that prevents non-uniform degradation while allowing compact device design.
Solution Approach 2:
The bundled holding structure creates homogeneous thermal conditions across all capacitors. By positioning capacitors in a bundled configuration with uniform spacing and thermal pathways through the holder, the system achieves homogeneous heat distribution, ensuring all capacitors degrade uniformly and maintain consistent performance.
3Volume of stationary object
If capacitors are bundled in a holder, then device size is minimized, but stress distribution on capacitors becomes uneven
Solution Approach 1:
The holder is segmented into multiple holding parts, each independently supporting a capacitor. This segmentation distributes mechanical stress evenly across all capacitors in the bundle, preventing stress concentration on individual components while maintaining compact device dimensions through the bundled configuration.
Solution Approach 2:
The bundled holding structure creates homogeneous mechanical support conditions for all capacitors. Each capacitor is held in a similar position and orientation within the holder, ensuring uniform stress distribution during device operation and vibration, thereby improving overall system stability and 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
This configuration reduces the size of the onboard power supply device by enabling the placement of heat-generating components near capacitors while maintaining uniform degradation and enhancing reliability through balanced heat dissipation and stress distribution.
Implementation Method 1
the holding parts act as a heat spreader and propagation path, allowing heat-generating components to be positioned close to capacitors while preventing concentrated heat propagation
Data Source
AI summary
An onboard power supply device includes capacitors, a holder holding the capacitors, a mounting board having the capacitors mounted thereon and having the holder fixed thereto, and a heat-generating component mounted on the mounting board. Each of the capacitors includes a capacitor body and a lead terminal extending from the capacitor body. The holder includes a base part, first holding parts bundled by the base part and holding the capacitors, second holding parts each connected to a corresponding one of the first holding parts, and a fixing part extending from an outer edge of the base part toward the mounting board and fixed to the mounting board. The capacitor body of each of the capacitors is held by a corresponding one of the first holding parts. The lead terminal of each of the capacitors is held by a corresponding one of the second holding parts. The mounting board has a through-hole therein through which the lead terminal passes. The through-hole is connected to the lead terminal. The corresponding one of the second holding parts has a holding through-hole therein extending along a through-axis coinciding with the through-hole. An inner wall of the holding through-hole contacts the lead terminal. This onboard power supply device has a small size.