Fuel Cell Operation Control Using Load Weight and Drive Output
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Solution Overview
Problem
Existing fuel cell systems in vehicles degrade in efficiency and durability due to excessive reliance on battery state of charge (SOC) without considering vehicle load weight and operational requirements, leading to inefficient low-output driving controls.
Innovation Solution
An operation controller that selectively performs driving stop control of the fuel cell based on vehicle load weight and required drive output, ensuring optimal fuel efficiency and durability by dynamically adjusting fuel cell operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If low-output driving control is applied to maintain high SOC, then fuel cell system operates continuously to charge the battery, but fuel efficiency degrades and stack durability shortens
Solution Approach 1:
The control system dynamically adjusts fuel cell operation mode based on real-time vehicle conditions. When vehicle speed exceeds a reference value or acceleration demand is high, the system switches from low-output driving control to normal output control, ensuring fuel cell operates efficiently only when necessary rather than continuously at low efficiency points
Solution Approach 2:
The system changes operational parameters by comparing actual vehicle speed and acceleration against reference values. When parameters indicate high demand conditions, the control strategy transitions from maintaining high SOC through low-output control to providing required power through normal output control, thereby improving fuel efficiency
2Quantity of substance
If low-output driving control is applied to maintain high SOC, then the fuel cell system is always operated, but stack durability is shortened
Solution Approach 1:
The control system dynamically determines fuel cell operation based on real-time vehicle conditions. By monitoring vehicle speed and acceleration demand against reference values, the system activates normal output control only when conditions warrant it, preventing continuous operation that would degrade the fuel cell stack
Solution Approach 2:
The system uses feedback from vehicle speed sensors and acceleration demand signals to continuously assess whether low-output driving control is appropriate. When feedback indicates high demand conditions (speed > reference or high acceleration), the system switches to normal output control, thereby protecting stack durability through condition-based operation
3Use of energy by moving object
If driving stop control is performed based only on required drive output, then fuel efficiency improves, but vehicle load conditions are not properly considered
Solution Approach 1:
The control system applies different control strategies to different operating conditions by evaluating local vehicle states. It separately considers vehicle speed and acceleration demand to determine whether driving stop control or normal output control is appropriate, ensuring adaptability to specific local conditions rather than applying a uniform strategy
Solution Approach 2:
The system changes control parameters based on vehicle state parameters. By comparing actual vehicle speed and acceleration demand against reference values, the system adjusts its control strategy between driving stop control and normal output control, thereby adapting to varying vehicle conditions while maintaining fuel efficiency
Data Source
AI summary
An operation controller of a fuel cell and an operation control method thereof in a system for generating a drive output through a fuel cell and a battery includes a processor for selectively performing a driving stop control of the fuel cell through an operation variable including a required drive output and a load weight.