Vehicle Power Supply System Backup Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional vehicle power supply systems fail to ensure safety during travel when the main power supply device is abnormal, as they do not provide a reliable backup power source to maintain essential vehicle functions.
Innovation Solution
A vehicle power supply system with a main power supply device and a backup power supply device, including switch circuits and a controller, which switches power sources to enable the vehicle to operate in a limited mode using the backup battery when the main power supply is abnormal, ensuring safety by prioritizing power to critical load units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle uses only the main power supply device, then the device complexity is low, but the reliability deteriorates when the main power supply device is abnormal
Solution Approach 1:
The power supply system is segmented into a main power supply device and a backup power supply device, each independently capable of supplying power to specific load units. The controller segments the power supply function by selecting which power supply device operates based on system state, thereby improving reliability without requiring the entire system to be redesigned.
Solution Approach 2:
The backup power supply device is prepared in advance with sufficient power capacity to support critical load units. The controller pre-configures the switch circuits and power distribution pathways so that when the main power supply device fails, the backup device can immediately take over without requiring complex real-time reconfiguration.
2Adaptability or versatility
If the backup battery supplies power to both first and second load units, then the vehicle functionality is maintained, but the power consumption increases beyond what the backup battery can provide
Solution Approach 1:
The backup power supply device is assigned a specific functional role of supplying power only to the second load unit, while the main power supply device continues to supply power to the first load unit. This local differentiation of power supply responsibilities ensures that the backup battery's limited power capacity is used efficiently for critical functions only.
Solution Approach 2:
The system implements partial action by having the backup power supply device supply power to only the essential second load unit rather than all load units. This selective power distribution allows the vehicle to maintain critical operational capabilities with the limited power capacity of the backup battery.
3Reliability
If the vehicle operates in normal mode with full functions, then the productivity is high, but the safety is compromised when the main power supply device is abnormal
Solution Approach 1:
The power supply system dynamically transitions between normal mode and limited mode based on the operational status of the main power supply device. The controller continuously monitors the main power supply device and automatically reconfigures the power distribution network, switching from full-power operation to backup-powered operation when needed, thereby maintaining safety while adapting productivity to available resources.
Solution Approach 2:
The controller acts as an intermediary that manages the transition between normal and limited operational modes. It controls the switch circuits to seamlessly transfer power distribution from the main power supply device to the backup power supply device, ensuring continuous operation of critical functions while maintaining vehicle safety during the transition.
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
Enables the vehicle to travel safely to a secure location even when the main power supply is abnormal by seamlessly switching to a backup power source, maintaining limited but essential functions, and estimating backup battery deterioration for proactive management.
Implementation Method 1
a backup battery that stores power supplied from the main power supply device and supplies power to the second load unit
Data Source
AI summary
In a vehicle power supply system, when a main power supply device is normal, a backup controller turns on a switch circuit and turns off a switch circuit to supply power from the main power supply device to a load unit LD1 and a load unit, and can travel a vehicle in a normal mode which is in a normal driving state. On the other hand, when the main power supply device is abnormal, the backup controller supplies power from the backup battery to the load unit and does not supply power from the backup battery to the load unit by turning on the switch circuit and turning off the switch circuit, and can travel the vehicle in the limit mode in which the functions are more limited than in the normal mode.