Fuel Cell Controller Prioritizing Power Limits During Control Collisions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional fuel cell control systems fail to effectively manage collisions between different control targets, leading to complex arbitration issues and potential inefficiencies in power generation.
Innovation Solution
A fuel cell system with a power generation controller that prioritizes certain controls over others, using a unification process to determine control contents and apply priority rules when collisions occur, ensuring efficient operation by avoiding complicated arbitration and maintaining predetermined stoichiometric ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If multiple ECUs perform independent control allocated to each, then power generation control can be distributed and specialized, but control collisions occur when not all target ranges are satisfied
Solution Approach 1:
The patent introduces a controller that acts as an intermediary between multiple ECUs to manage control collisions. The controller receives target ranges from multiple ECUs, determines whether collisions occur, and when collisions are detected, selects which control to prioritize and which to suspend. This intermediary structure resolves the contradiction by maintaining distributed control benefits while preventing reliability issues from control collisions.
2Reliability
If control collision arbitration is implemented to resolve conflicts between ECUs, then control reliability improves, but system complexity increases due to arbitration mechanisms
Solution Approach 1:
The controller serves as a centralized intermediary that simplifies the arbitration process. Instead of implementing complex peer-to-peer arbitration mechanisms between multiple ECUs, the patent uses a single controller to receive all target ranges, detect collisions, and make prioritization decisions. This approach improves reliability through systematic collision resolution while minimizing added complexity by consolidating arbitration functions in one component rather than distributing complex arbitration logic across multiple ECUs.
3Adaptability or versatility
If all control targets are enforced equally, then comprehensive control is achieved, but control efficiency decreases due to complicated arbitration requirements
Solution Approach 1:
The patent implements dynamic control prioritization where the controller adjusts which control targets are enforced based on real-time collision detection. When no collision occurs, all control targets can be enforced comprehensively. When a collision is detected, the controller dynamically selects which control to prioritize and which to suspend, rather than enforcing all controls equally. This dynamic approach maintains comprehensive control adaptability while improving efficiency by avoiding unnecessary arbitration for non-colliding controls.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A control method when pieces of control on various physical quantities collide with each other is provided. An upper limit current value ImaxA for realizing power control for preventing generated power from exceeding an upper limit value, voltage control for preventing generated voltage from falling below a lower limit value and current control for preventing generated current from exceeding an upper limit value is determined. Furthermore, a lower limit current value Imin for preventing the generated voltage from exceeding an upper limit value is determined. When ImaxA is less than Imin, the target value of the current value is set at ImaxA ((d), (e) and (f)).