Fuel Cell Power Supply System Abnormality Detection and Regeneration Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
During intermittent operation of a fuel cell power supply system, if an abnormality occurs in the secondary battery, it cannot supply power to the auxiliaries, preventing the fuel cell from restarting power generation, which can lead to the electric vehicle being unable to continue traveling.
Innovation Solution
A power supply method and system that includes a controller to determine abnormalities in the secondary battery, instruct the motor to regenerate power, and supply this regenerated power to the auxiliaries, enabling the fuel cell to restart power generation by charging a capacitor which then powers the auxiliaries to initiate fuel cell operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the fuel cell operates intermittently to supply power to the motor and auxiliaries, then the power supply efficiency is improved, but the reliability deteriorates when an abnormality occurs in the secondary battery
Solution Approach 1:
The control unit determines whether an abnormality has occurred in the secondary battery before the fuel cell needs to restart. By detecting abnormalities in advance and preparing the auxiliary power source (motor generator) beforehand, the system ensures that power can be supplied to auxiliaries without interruption when the fuel cell needs to restart, thus maintaining reliability while preserving intermittent operation efficiency
Solution Approach 2:
The motor generator serves as an intermediary power source between the secondary battery and the auxiliaries. When the secondary battery has an abnormality, the motor generator temporarily supplies power to the auxiliaries, enabling the fuel cell to restart without being blocked by the battery abnormality. This intermediary solution resolves the contradiction by providing an alternative power path
2Ease of operation
If the secondary battery supplies power to the auxiliaries during intermittent operation, then the fuel cell can restart smoothly, but the system becomes vulnerable when the secondary battery has an abnormality
Solution Approach 1:
The control unit monitors the state of the secondary battery and detects abnormalities by comparing actual parameters against normal operating ranges. When an abnormality is detected, the control unit changes the power supply configuration parameter, switching from relying solely on the secondary battery to using the motor generator as an auxiliary power source, thus maintaining fuel cell restart capability while improving system robustness
Solution Approach 2:
The system dynamically adjusts the power supply configuration based on the real-time state of the secondary battery. When the battery is normal, the system operates in the standard intermittent mode. When an abnormality is detected, the system dynamically switches to an alternative configuration where the motor generator supplies power to auxiliaries, ensuring continuous operational reliability
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 fuel cell to restart power generation even when an abnormality occurs in the secondary battery during intermittent operation, ensuring continued vehicle travel by providing necessary power to the auxiliaries and motor.
Implementation Method 1
instructing the motor to generate electricity
Implementation Method 2
generates electricity as a result of an electrochemical reaction of the fuel gas and oxidizing gas
Data Source
AI summary
A power supply method carried out in a system that includes a fuel cell, a secondary battery, a motor, and an auxiliary for the fuel cell includes controlling an intermittent operation by which execution and stoppage of power generation by the fuel cell is switched intermittently to supply power to electric power loads including the motor and the auxiliary, determining whether or not an abnormality occurs in the secondary battery during the intermittent operation, instructing the motor to regenerate power on a condition that it is determined that an abnormality occurs in the secondary battery in the determination of whether or not the abnormality occurs, and supplying power, which is obtained by carrying out the regeneration, to the auxiliary.