Dual Power Supply Path Switching for EV Operation Continuity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing power supply systems in vehicles face challenges in implementing redundancy to ensure operation continuity during failures without significantly increasing costs.
Innovation Solution
A power supply network with dual power supply paths, one connected to the main-machine drive power supply and another to a separate power source, using a switch to isolate abnormal paths, ensuring redundancy and continuous operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power supply redundancy is implemented by making both power supply unit and control unit redundant, then operation continuity is ensured, but system cost increases significantly
Solution Approach 1:
The power supply system is segmented into two independent power supply paths: a first power supply path connected to the main-machine drive power supply, and a second power supply path connected to a separate power source. This segmentation allows the system to achieve redundancy without duplicating the entire power supply unit and control unit, thereby reducing system cost while ensuring operation continuity.
Solution Approach 2:
A switch is introduced as an intermediary component to control the connection between the first and second power supply paths. The switch enables automatic transition between power supply paths when abnormalities are detected, ensuring continuous operation without requiring full redundancy of power supply units and control units, thus resolving the contradiction between reliability and device complexity.
2Reliability
If dual power supply paths with switch control are implemented, then operation continuity is ensured with simple configuration, but system complexity increases
Solution Approach 1:
The switch is configured to dynamically change its state (closed or open) based on the normal or abnormal condition of the power supply paths. This dynamic adjustment allows the system to adapt to different operational conditions automatically, ensuring operation continuity while maintaining relatively simple configuration compared to static redundant systems.
Data Source
AI summary
The object of the present invention is to achieve redundancy of a power supply function by a simple configuration, to ensure operational continuity in case of failure. A power grid (1) comprises: a first power supply path (20-1) that is connected to a main engine-driving power source (100-0) of a vehicle via a power conversion device (101) and to loads (40-1, 41, 42-1) ; and a second power supply path (20-2) that is connected to a power source (100-2) different from the main engine-driving power source (100-0), to loads (40-2, 41, 42-2), and to the first power supply path (20-1) via a switch SW0. The switch SW0 is closed when the first power supply path (20-1) and the second power supply path (20-2) are normal, and is opened when the first power supply path (20-1) or the second power supply path (20-2) is abnormal.