Capacitor Heat Dissipation via Elastic Plate Springs
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Solution Overview
Problem
Conventional capacitors face inadequate cooling due to filler resin entering between the capacitor unit and the cooling plate, impairing heat dissipation and resulting in unsatisfactory cooling of the capacitor element.
Innovation Solution
A capacitor design that includes a case filled with filler resin, a heat dissipater connected to a cooler, and an elastic body that applies a force to the capacitor unit towards the heat dissipater, preventing filler resin from interfering with heat dissipation by ensuring the capacitor unit is pressed firmly against the cooling plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the case is filled with filler resin to protect the capacitor element, then the capacitor element is protected against moisture and impact, but the filler resin may enter between the capacitor unit and the cooling plate, impairing heat dissipation
Solution Approach 1:
The elastic body is pre-installed between the capacitor unit and the cooling plate to apply continuous elastic force. This preliminary action prevents filler resin from entering the gap between these components during the filling process, thereby maintaining effective heat dissipation while still allowing the case to be filled with protective resin.
Solution Approach 2:
The elastic body acts as an intermediary component between the capacitor unit and the cooling plate. It maintains a controlled interface that prevents filler resin intrusion while allowing thermal contact, thus mediating between the protective filling requirement and the heat dissipation requirement.
2Temperature
If the capacitor element is cooled via a cooling plate, then the heat dissipation is improved, but the structure becomes more complex
Solution Approach 1:
The elastic body is integrated into the existing assembly between the capacitor unit and cooling plate, combining the cooling function with the mechanical assembly structure. This merging approach adds minimal complexity while achieving both cooling and gap prevention functions.
Solution Approach 2:
The elastic body serves multiple functions: it maintains mechanical contact between components, prevents filler resin intrusion, and ensures thermal contact for heat dissipation. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in structural complexity.
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 ensures effective cooling of the capacitor element by minimizing the presence of filler resin between the capacitor unit and the cooling plate, thereby enhancing heat dissipation and maintaining a satisfactory cooling performance.
Implementation Method 1
The elastic body applies an elastic force to the capacitor unit in a direction toward the heat dissipater
Implementation Method 2
The heat dissipater is connected to a cooler and discharges heat generated from the capacitor element into the cooler
Data Source
AI summary
Film capacitor includes capacitor unit that has capacitor elements, upper bus bar, and lower bus bar. Capacitor elements have upper end electrodes and lower end electrodes that are connected to upper bus bar and lower bus bar, respectively. Film capacitor further includes case containing capacitor unit and being filled with filler resin, cooling plate near capacitor unit, and plate springs. Cooling plate is connected to a cooler and discharges heat generated from capacitor elements into the cooler. Plate springs apply an elastic force to capacitor unit in a direction toward cooling plate.