Fuel Cell Controller Mode Switching for Trial Operations

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Solution Overview

Problem

Conventional fuel cell systems face limitations during trial operations or maintenance, where the allocated allowable operation time can be insufficient, leading to incomplete trial operations and potential power generation disruptions, especially when the remaining time is reduced or exhausted, affecting users' ability to operate the system.

Innovation Solution

A fuel cell system with a controller that switches between normal and special operation modes, allowing extended operation during trial or maintenance periods without adhering to the usual time or usage limits, ensuring sufficient power generation time for users by permitting operations beyond the normal mode constraints.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the fuel cell system operates in normal mode with limited allowable operation time, then the system durability is ensured, but the trial operation cannot be performed sufficiently when remaining time is reduced

Engineering Contradiction:

Improvesystem durabilityVSAvoidtrial operation completeness

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The system dynamically switches between normal mode and special mode based on operational needs. In normal mode, the fuel cell operates with limited allowable operation time to ensure durability. When trial operation or maintenance is required, the system transitions to special mode which allows extended operation beyond the normal time limits, thus completing trial operations sufficiently while preserving system durability through controlled mode transitions.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The controller changes the operational parameters of the fuel cell by switching between two distinct modes: normal mode with constrained operation time (ensuring durability) and special mode with relaxed time constraints (enabling complete trial operations). This parameter change allows the system to adapt to different operational requirements without compromising overall system reliability.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If the allowable operation time is allocated for normal power generation, then user power generation needs are met, but the trial operation time becomes insufficient when remaining time is reduced

Engineering Contradiction:

Improvepower generation outputVSAvoidtrial operation time

Core Design Contradiction:

ProductivityVSDuration of action of moving object

Solution Approach 1:

The system employs dynamic mode switching to allocate operation time flexibly. During normal power generation, the system operates in normal mode with controlled duration to meet user needs. When trial operation is required, the system transitions to special mode that provides extended operation time, thus ensuring both power generation productivity and sufficient trial operation duration.

Inventive Principle:

Principle #15Dynamics

3Productivity

If the fuel cell operates without time limits during trial operation, then sufficient trial operation can be performed, but the system durability is compromised

Engineering Contradiction:

Improvetrial operation completenessVSAvoidsystem durability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The system dynamically adjusts operational constraints based on the operational mode. In special mode during trial operation, the fuel cell operates without the strict time limits of normal mode, allowing complete trial operations. However, the system automatically transitions back to normal mode with time constraints after trial operation, thus ensuring system durability through controlled alternation between unrestricted and restricted operation periods.

Inventive Principle:

Principle #15Dynamics

4Productivity

If the allowable operation time is exhausted during trial operation, then trial operation can be completed thoroughly, but user power generation operation is disrupted until next day

Engineering Contradiction:

Improvetrial operation completenessVSAvoidpower generation continuity

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The system uses dynamic mode switching to prevent power generation disruptions. When in special mode during trial operation, even if the normal allowable operation time is exhausted, the system continues operating in special mode rather than shutting down. This dynamic transition ensures trial operation completeness while maintaining power generation continuity, as the system can switch between modes based on operational requirements rather than being constrained by normal mode time limits.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS9219284B2Fuel cell system and operation method thereof which ensures the system will perform normal operation after operating in a special operation mode

Publication Date: 2015.12.22 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

AI summary

A controller in a fuel cell system operates a fuel cell in a normal mode or in a special mode. In the normal mode, the fuel cell is operated to satisfy at least one of a first operation condition and a second operation condition, under the first operation condition an operation time of the fuel cell per unit period is equal to or shorter than a unit allowable operation time, under the second operation condition the number of times of operation of the fuel cell per unit time is equal to or less than a unit allowable number of times of operation, and in the special mode, the fuel cell is operated without being limited by at least one of the first operation condition and the second operation condition.