Electrical Connection Box Cover With Plastic Heat Dissipation Contact
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Solution Overview
Problem
The increasing number of high heat-generating components in automotive electrical connection boxes leads to local overheating due to trapped heat, risking damage to components like fuses and relays, and existing heat dissipation methods using elastic resin members require high contact pressure, which can further damage the components.
Innovation Solution
An electrical connection box design featuring a heat dissipation member holding portion on the cover member that protrudes towards the components, using a plastic heat dissipation member with plasticity to reduce contact pressure and ensure stable contact, allowing efficient heat dissipation without damaging the components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat dissipation member made of elastic resin is pressed against electrical components to dissipate heat, then heat dissipation is improved, but the contact pressure required may damage the electrical components
Solution Approach 1:
The patent changes the material parameter from elastic resin to plastic material, which fundamentally alters the contact mechanism. The plastic heat dissipation member deforms under its own weight and thermal expansion to maintain contact, eliminating the need for high external contact pressure that would damage components while still achieving effective heat dissipation
2Reliability
If the electrical connection box is hermetically sealed to protect components, then reliability is improved, but heat is trapped causing local overheating
Solution Approach 1:
The patent introduces a plastic heat dissipation member as an intermediary between the electrical components and the hermetically sealed box environment. This mediator conducts heat away from the components through thermal conduction while being pressed against them by thermal expansion and gravity, allowing the box to remain hermetically sealed for protection while effectively managing heat accumulation
3Productivity
If multiple heat-generating components are concentrated in a limited space to increase component density, then productivity is improved, but heat dissipation becomes more difficult
Solution Approach 1:
The patent employs a self-service mechanism where the plastic heat dissipation member automatically adjusts its contact pressure with components through thermal expansion and gravitational force. As components generate heat and expand, they naturally press the heat dissipation member against them, creating a self-regulating heat dissipation system that works effectively even with high component density in limited space
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 effectively reduces the risk of component damage and enhances heat dissipation by using a plastic heat dissipation member that can deform and maintain contact with components, ensuring efficient heat release from the electrical connection box.
Implementation Method 1
a plastic heat dissipation member held by the heat dissipation member holding portion is made to come into contact with a surface of the electrical component... efficiently release heat generated by the electrical components to the outside of an electrical connection box via a plastic heat dissipation member and a cover member
Implementation Method 2
a plastic heat dissipation member held by the heat dissipation member holding portion is made to come into contact with a surface of the electrical component... a plastic heat dissipation member that can deform and maintain contact with components
Data Source
AI summary
Provided is an electrical connection box 10 that includes a box main body 12 having a surface 14 provided with a component mounting portion 22 in which an electrical component 30 is mounted; and a cover member 16 covering the surface 14 of the box main body 12, in which an inner surface 48 of a top wall portion 42 of the cover member 16 is provided with a heat dissipation member holding portion 52 that protrudes toward the electrical component 30, and a plastic heat dissipation member 64 held by the heat dissipation member holding portion 52 is made to come into contact with a surface 66 of the electrical component 30.