Refrigerant-Cooled Bus Bar Assembly for Compact Heat Dissipation
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Solution Overview
Problem
Existing circuit assemblies with heat-generating components suffer from reduced heat dissipation efficiency due to the need for a heat conducting member to bridge the bus bar and heat dissipater, occupying unnecessary mounting area.
Innovation Solution
A circuit assembly design that incorporates a current-carrying bus bar with a bolt fastening portion and hollow ducts, connected to refrigerant pipes for direct cooling, reducing the need for a heat conducting member and enhancing heat dissipation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat conducting member is used to connect the bus bar and heat dissipater, then heat dissipation is achieved, but the mounting area is increased and heat dissipation efficiency is reduced
Solution Approach 1:
The patent combines the heat conducting member and the bus bar into a single integrated structure. The bus bar itself is designed to serve as the heat conducting member, eliminating the need for a separate heat conducting component. This merging reduces the total mounting area while improving heat dissipation efficiency by creating a direct thermal path from the heat-generating component through the bus bar to the heat dissipater.
2Ease of operation
If a heat conducting member is interposed between the bus bar and heat dissipater to absorb tolerances, then assembly flexibility is improved, but heat dissipation efficiency is reduced
Solution Approach 1:
The patent segments the heat conducting member into multiple sections along its length. These sections include tapered portions with varying thicknesses that can independently deform to accommodate dimensional tolerances. This segmentation allows the heat conducting member to absorb assembly variations while maintaining good thermal contact between the bus bar and heat dissipater, thus preserving heat dissipation efficiency while providing assembly flexibility.
3Temperature
If the bus bar is pressed against the heat dissipater via a heat conducting member, then heat dissipation is achieved, but the structure becomes more complex
Solution Approach 1:
The patent merges the functions of the bus bar and heat conducting member into a single integrated component. The bus bar is designed with specific geometric features including tapered sections that directly perform the heat conduction function, eliminating the need for a separate heat conducting member and reducing structural complexity while maintaining effective heat dissipation.
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 allows for improved heat dissipation efficiency and reduced mounting area by using a current-carrying bus bar with integrated refrigerant cooling, maintaining ease of assembly and handling.
Implementation Method 1
a hollow duct, which extends through an inside of the current-carrying bus bar... the first connecting pipe includes a first pipe connection port that is connectable to an external refrigerant source
Implementation Method 2
the first connecting pipe includes a first pipe connection port that is connectable to an external refrigerant source, and the second connecting pipe includes a second pipe connection port that is connectable to the refrigerant source
Data Source
AI summary
A circuit assembly includes a heat generating component and a current-carrying bus bar. The current-carrying bus bar includes a hollow duct that extends through the current-carrying bus bar and includes a first opening that is open at one end of the current-carrying bus bar and a second opening that is open at the other end, a first connecting pipe, which is connected in a fluid-tight manner to a first end of the current-carrying bus bar, surrounds the first opening, and communicates with the first opening, and a second connecting pipe, which is connected in a fluid-tight manner to another end of the current-carrying bus bar, surrounds the second opening, and communicates with the second opening. The first connecting pipe includes a first pipe connection port connectable to a refrigerant source, and the second connecting pipe includes a second pipe connection port connectable to the refrigerant source.