Onboard Power Hub Layout for Vehicle Voltage Drop Isolation
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Solution Overview
Problem
The increasing number of electronic devices in vehicles due to electrification and automation leads to a complex power distribution system, where significant voltage drops can occur, potentially affecting the performance and functionality of critical devices, especially those related to traveling and safety.
Innovation Solution
The onboard power source system is designed with a main power source unit, power source hubs, and a main power feeding cable, where electronic devices related to power (like generators or electric motors) and those related to traveling or safety (like electric power steering or brakes) are connected to different power source hubs to isolate them from voltage drops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If zone power distribution is used to reduce system complexity, then the number of cables and design complexity are reduced, but significant voltage drops occur in the main power feeding cable
Solution Approach 1:
The system segments the power distribution network into multiple independent zones by connecting different electronic devices to different power source hubs. This segmentation isolates voltage drops to specific zones, preventing them from affecting the entire system. Critical devices are placed in separate zones from high-current devices, thereby reducing overall system complexity while maintaining voltage stability for critical functions.
2Device complexity
If multiple electronic devices are connected to the same power source hub, then system complexity is reduced, but voltage drops affect critical devices like steering and braking systems
Solution Approach 1:
The system applies local quality by assigning different connection configurations to different zones based on their specific requirements. Critical devices (steering, braking) are connected to power source hubs with configurations optimized for voltage stability, while non-critical devices can tolerate higher voltage drops. This localized optimization reduces overall system complexity while protecting critical devices from harmful voltage drops.
3Ease of manufacture
If a single main power feeding cable is used to connect all power source hubs, then installation is simplified, but large currents cause significant voltage drops
Solution Approach 1:
The power distribution system is segmented into multiple independent power source hubs, each with its own main power feeding cable connection to the main power source. This segmentation allows current to be distributed across multiple cables rather than concentrated in a single cable, reducing voltage drops while maintaining installation simplicity through modular deployment.
Data Source
AI summary
An onboard power source system includes: a main power source unit that supplies power; one or a plurality of power source hubs; a plurality of electronic devices; and a main power feeding cable that connects the one or plurality of power source hubs to the main power source unit, in which an electronic device related to power among the plurality of electronic devices and an electronic device related to traveling or safety among the plurality of electronic devices are connected to different power source hubs.