Redundant Vehicle Power Supply Control for DCDC Failure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing power supply systems in driverless vehicles lack redundant power supply designs, leading to insufficient safety and reliability, with a failure probability of 50% when the DCDC converter fails.
Innovation Solution
A power supply system for driverless vehicles incorporating a high-voltage battery box, a DC converter, a main storage battery, a standby storage battery, and a power domain controller, with redundant power supplies and relays to manage power distribution and cutoffs in case of failures, reducing failure probability to 14.3%.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single power supply system is used in driverless vehicles, then the device complexity is reduced, but the reliability of power supply is insufficient with 50% failure probability when DCDC converter fails
Solution Approach 1:
The power supply system is segmented into multiple independent power sources including DCDC converter, main storage battery, and standby storage battery. Each component can operate independently or in combination, allowing the system to maintain functionality even when one segment fails, thus reducing the 50% failure probability to 14.3%.
Solution Approach 2:
Different parts of the power supply system are assigned different functions and characteristics. The DCDC converter handles primary power conversion, the main storage battery provides primary power storage, and the standby storage battery provides backup power. This local differentiation ensures that failure in one component does not compromise the entire system.
2Reliability
If redundant power supply components are added, then the reliability is improved, but the device complexity and number of components increase
Solution Approach 1:
Multiple power supply components (DCDC converter, main storage battery, standby storage battery) are merged into a single integrated power supply system managed by one control unit. This consolidation allows the system to achieve high reliability through redundancy while avoiding the complexity of multiple separate control systems, as all components are coordinated through a unified control architecture.
3Duration of action of moving object
If multiple storage batteries are used, then the power supply duration is prolonged, but the weight and volume of the system increase
Solution Approach 1:
The power supply system dynamically switches between different power sources based on real-time conditions. The control unit monitors the state of charge and health of each battery, automatically selecting the optimal power source combination. This dynamic management ensures maximum power supply duration while minimizing the actual weight impact, as not all batteries need to be fully charged or activated simultaneously.
Data Source
AI summary
The present disclosure provides a driverless power supply system, a power supply control method, a power domain controller and a vehicle, which relate to the technical field of intelligent traffic, and particularly relate to the technical field of driverless driving. The system includes: a high-voltage battery box, a direct current converter, a main storage battery, a standby storage battery, a power domain controller and an electrical load; the direct current converter is connected with the high-voltage battery box and the electrical load through wires; the main storage battery is respectively connected with the direct current converter and the electrical load through wires; the standby storage battery is respectively connected with the direct current converter and the electrical load through wires; and the power domain controller is respectively connected with the direct current converter, the main storage battery and the standby storage battery through data wires.