Multi-Module Fuel Cell Startup Using Cross-Module Power Supply
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Solution Overview
Problem
High-output multi-module fuel cell power generating systems require complex configurations and additional power sources for startups and cold shutdowns due to the use of unidirectional boost converters and high-voltage batteries, increasing complexity and costs.
Innovation Solution
A multi-module fuel cell power generating system where a first fuel cell module supplies electric power for the startup and cold shutdown of a second fuel cell module, eliminating the need for external high-voltage batteries and reducing the number of low-voltage batteries and bi-directional DC-DC converters, with power management through a bi-directional low voltage DC-DC converter and buck converter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If unidirectional boost converters and high-voltage batteries are used for startup and cold shutdown, then power supply capability is improved, but device complexity increases
Solution Approach 1:
The patent extracts and removes the high-voltage battery from the system, eliminating the need for complex bidirectional DC-DC converters. The fuel cell module directly supplies power for startup and cold shutdown functions, simplifying the overall system architecture while maintaining power supply capability.
Solution Approach 2:
The fuel cell module is designed to perform multiple functions: normal power generation and startup/cold shutdown power supply. By making the fuel cell module universal, the system eliminates dedicated high-voltage batteries and complex power conversion equipment, reducing device complexity while maintaining full power supply capability.
2Reliability
If high-voltage batteries and bidirectional DC-DC converters are used, then startup and cold shutdown power supply is ensured, but manufacturing cost increases
Solution Approach 1:
The patent removes the high-voltage battery and bidirectional DC-DC converter components from the system. The fuel cell module directly provides power for startup and cold shutdown operations, eliminating the need for expensive additional components while ensuring reliable power supply.
Solution Approach 2:
The patent utilizes the fuel cell module's inherent power supply capability for startup and cold shutdown functions, avoiding the need for expensive high-voltage batteries and complex power conversion equipment. This approach reduces manufacturing costs while maintaining operational reliability.
3Adaptability or versatility
If multiple low-voltage batteries and bidirectional DC-DC converters are used for power management, then power distribution flexibility is improved, but device complexity increases
Solution Approach 1:
The patent removes multiple low-voltage batteries and bidirectional DC-DC converters from the system. The fuel cell module directly supplies power for startup and cold shutdown operations, simplifying the power management architecture while maintaining adequate power distribution flexibility.
Solution Approach 2:
The fuel cell module serves as a universal power source for both normal operation and startup/cold shutdown functions. This multi-functionality eliminates the need for multiple dedicated power sources and complex power management equipment, reducing device complexity while preserving power distribution flexibility.
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
Simplifies the system structure, reduces control complexity, and lowers manufacturing costs by providing independent power supply without external high-voltage batteries, while maintaining efficient startup and shutdown operations.
Implementation Method 1
a first fuel cell module (301) including a first plurality of embedded fuel cells
Data Source
AI summary
The present disclosure relates to startup and cold shutdown (CSD) of a multi-module fuel cell power generating system. According to the present disclosure, a first fuel cell module may supply electric power that is required for startup and cold shutdown of a second fuel cell module, and the second fuel cell module may perform the startup or cold shutdown of the second fuel cell module by using the electric power supplied from the first fuel cell module. According to the present disclosure, the numbers of high-voltage batteries, low-voltage batteries and bi-directional low voltage DC-DC converters (BLDCs) used for multi-module fuel cell power generation may be reduced and control complexity may be reduced.