Vehicle Junction Box Layout for High- and Low-Voltage Isolation
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Solution Overview
Problem
Existing electrical junction boxes for vehicles face challenges in accommodating both high-voltage and low-voltage circuits within a compact and simplified configuration, while preventing current leakage between high-voltage and low-voltage terminals.
Innovation Solution
The electrical junction box incorporates a single connection portion with both high-voltage and low-voltage terminals, utilizing a recessed engagement portion, partition plates, and fins to create a sufficient creepage distance and ensure insulation between the terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate connection portions are provided for high-voltage and low-voltage terminals, then current leakage between terminals is prevented, but the configuration becomes complex and workability deteriorates
Solution Approach 1:
The patent combines high-voltage and low-voltage terminals into a single integrated connection portion, eliminating the need for separate connection portions while maintaining insulation through proper terminal arrangement and spacing
Solution Approach 2:
The patent applies different insulation measures to different areas within the connection portion, such as positioning terminals at specific distances from each other and using insulating materials selectively where needed, rather than providing uniform insulation throughout
2Reliability
If separate connection portions are provided for high-voltage and low-voltage terminals, then current leakage is prevented, but the electrical junction box size increases
Solution Approach 1:
The patent merges high-voltage and low-voltage terminals into a single connection portion, reducing the overall space required compared to providing separate connection portions for each voltage type
Solution Approach 2:
The patent arranges terminals in specific spatial configurations within the connection portion, using three-dimensional positioning and spacing to achieve adequate insulation distances while minimizing the overall footprint of the electrical junction box
3Volume of moving object
If terminals are located close to each other, then the electrical junction box can be made compact, but current leakage occurs between high-voltage and low-voltage terminals
Solution Approach 1:
The patent applies targeted insulation measures at specific locations where high-voltage and low-voltage terminals are positioned close to each other, such as using insulating barriers or maintaining minimum spacing distances only where voltage differences exist, rather than providing uniform insulation throughout the entire connection portion
Data Source
AI summary
The configuration of an electrical junction box is simplified and made compact. Provided is an electrical junction box for a vehicle, including a housing that accommodates a high-voltage circuit for high voltages and a low-voltage circuit for low voltages, the electrical junction box including a connection portion for connection to the outside, the connection portion being provided on the housing, wherein the connection portion has both a high-voltage terminal connected to the high-voltage circuit and a low-voltage terminal connected to the low-voltage circuit.