Bus Bar Extension Layout for Thermal Control in Connection Units

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Solution Overview

Problem

Existing electrical connection units lack effective heat storage properties, which can lead to inefficient heat management and potential thermal issues.

Innovation Solution

The electrical connection unit incorporates a bus bar with a connection path portion and an extension that overlaps electronic components, enhancing thermal characteristics by improving heat storage and dissipation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If a conventional bus bar design is used without extension overlapping electronic components, then the electrical connection function is achieved, but the heat storage property is insufficient

Engineering Contradiction:

Improveheat storage propertyVSAvoidbus bar structure

Core Design Contradiction:

TemperatureVSDevice complexity

Solution Approach 1:

The bus bar extension is designed to overlap the electronic component in the vertical direction (when viewed from the thickness direction of the flat surface portion), creating a three-dimensional thermal management structure. This spatial arrangement allows the bus bar to serve both electrical connection and heat storage functions simultaneously, improving thermal characteristics without adding separate heat storage components.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The bus bar is designed to perform multiple functions: it provides electrical connection between connection targets and simultaneously serves as a heat storage component by overlapping the electronic component. This multi-functional design improves heat storage property while avoiding additional structural complexity from separate components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Temperature

If the bus bar extension overlaps the electronic component, then thermal characteristics are improved, but the manufacturing precision requirement increases

Engineering Contradiction:

Improvethermal characteristicsVSAvoidalignment precision

Core Design Contradiction:

TemperatureVSManufacturing precision

Solution Approach 1:

The flat surface portion is designed with a predetermined size and shape that allows the bus bar to be positioned and fixed before final assembly. This preliminary positioning structure ensures proper alignment between the bus bar extension and the electronic component, reducing the need for high-precision adjustments during manufacturing while maintaining effective thermal contact.

Inventive Principle:

Principle #10Preliminary action

3Temperature

If the flat surface portion is made larger to accommodate the bus bar extension, then the heat storage capacity increases, but the housing space requirement increases

Engineering Contradiction:

Improveheat storage capacityVSAvoidhousing space

Core Design Contradiction:

TemperatureVSArea of stationary object

Solution Approach 1:

Instead of increasing the horizontal area of the flat surface portion, the design utilizes the vertical dimension by having the bus bar extension overlap the electronic component. This three-dimensional arrangement increases heat storage capacity through enhanced thermal contact area without requiring additional housing space in the horizontal plane.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 design enhances the thermal management of electrical connection units by improving heat storage and dissipation, ensuring efficient operation and reducing thermal stress.

Implementation Method 1

The bus bar includes a connection path portion and an extension. The extension extends outward of the connection path portion and overlaps the first electronic component when viewed from the first direction... the thermal characteristics of the electrical connection unit can be improved

Methodology Applied

Scientific EffectHeat conduction: Conduction (thermal)

Data Source

PatentUS20250372970A1Electrical connection unit

Publication Date: 2025.12.04 YAZAKI CORP

AI summary

An electrical connection unit includes a first connection target, a second connection target, a base member, and a bus bar. The base member has a plate-shaped or sheet-shaped flat surface portion facing the first connection target and the second connection target. The bus bar is held by the flat surface portion and electrically connects the first connection target to the second connection target. In a case where a thickness direction of the flat surface portion is a first direction, the flat surface portion includes an accommodation portion recessed in the first direction or penetrating the flat surface portion in the first direction. The bus bar includes a connection path portion and an extension. The connection path portion extends between the first connection target and the second connection target. The extension extends outward of the connection path portion and overlaps the first electronic component when viewed from the first direction.