Modular Fuel Cell Power Distribution With Electrical Isolation
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Solution Overview
Problem
Existing fuel cell systems in vehicles face challenges in efficiently distributing power between parallel systems, leading to inefficiencies and complications in optimizing system performance, durability, and drivability.
Innovation Solution
A modular fuel cell system architecture with electrically isolated high voltage portions allows for independent control and power management of each parallel system, optimizing power distribution based on individual states and torque requests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If power is distributed between parallel fuel cell systems without electrical isolation, then power distribution flexibility is improved, but system complexity and control difficulty increase
Solution Approach 1:
The fuel cell system is divided into electrically isolated parallel systems, each with its own power management. This segmentation allows independent control of each system while maintaining overall flexibility in power distribution to different loads.
Solution Approach 2:
A control system acts as an intermediary between the electrically isolated parallel fuel cell systems and the loads. This mediator coordinates power distribution from multiple isolated systems without requiring direct electrical connection between them, reducing system complexity.
2Adaptability or versatility
If batteries in parallel systems are allowed to discharge at different rates, then power delivery flexibility is improved, but durability and reliability decrease
Solution Approach 1:
The control system continuously monitors the state of charge and operating conditions of batteries in parallel systems, using feedback to dynamically adjust power distribution. This ensures flexible power delivery while maintaining battery durability through balanced discharge rates.
Solution Approach 2:
The system dynamically adjusts power distribution between parallel battery systems based on real-time conditions such as state of charge, temperature, and load demands. This dynamic balancing maintains flexibility while preventing excessive discharge rates that would harm battery durability.
3Ease of manufacture
If fuel cell systems operate without modular architecture, then system integration is simplified, but adaptability to different applications decreases
Solution Approach 1:
The fuel cell system employs a modular architecture where identical parallel systems can be independently designed and manufactured, then integrated into different vehicle applications. This segmentation simplifies manufacturing while enabling adaptability through flexible system configuration.
Solution Approach 2:
The modular parallel fuel cell architecture creates universal building blocks that can be adapted to various vehicle types and power requirements. The same standardized modules serve multiple functions across different applications, enhancing adaptability without complicating integration.
4Speed
If power is rapidly cycled between fuel cell systems, then responsiveness to torque demands is improved, but system durability decreases
Solution Approach 1:
The control system implements periodic action by alternating power delivery between parallel fuel cell systems in a coordinated manner. This periodic switching provides rapid responsiveness to torque demands while distributing wear and cycling across multiple systems, thereby extending overall system durability.
Solution Approach 2:
The system recovers and balances power distribution between parallel fuel cell systems over time, allowing one system to rest while another provides power. This recovery period reduces cumulative cycling stress on individual systems, improving durability while maintaining rapid responsiveness through the other active system.
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
This approach enhances the efficiency, durability, and drivability of the fuel cell system by maintaining a balanced state of charge in batteries, reducing power cycling, and optimizing power distribution to meet torque demands while minimizing vibrations and shocks.
Implementation Method 1
a fuel cell electrically connected to supply electrical power to the first motor
Implementation Method 2
a battery electrically connected to supply power to the first motor
Data Source
AI summary
Systems and methods are provided for modularizing power systems for vehicles. For example, a presently disclosed modular system of a vehicle may comprise: (1) a shaft; (2) a first parallel system comprising a first motor coupled to the shaft to rotate the shaft, and a fuel cell electrically connected to supply electrical power to the first motor; and (3) a second parallel system electrically isolated from the first parallel system, the second parallel system comprising a second motor coupled to the shaft to rotate the shaft, and a second fuel cell electrically connected to supply electrical power to the second motor.