Fuel Cell Output Control Using Real-Time Cooling Capacity
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Solution Overview
Problem
Existing fuel cell systems for vehicles face challenges in efficiently operating across varying ambient temperatures and driving conditions, leading to potential overheating and reduced stability.
Innovation Solution
A fuel cell system with a cooling circuit, data ascertainment device, and control device that adjusts the electric output based on real-time cooling power measurements, ensuring operation within safe temperature limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the electric output of the fuel cell is increased to generate more power, then the power output is improved, but the heat emission increases causing overheating risk
Solution Approach 1:
The control device continuously receives actual cooling power data from the cooling circuit, calculates the second cooling power at maximum permissible temperature, and dynamically adjusts the maximum permissible electric output based on this feedback. This closed-loop control ensures the fuel cell operates within safe temperature limits while maximizing power output.
Solution Approach 2:
The system dynamically adjusts the maximum permissible electric output based on real-time cooling conditions rather than using a fixed limit. The control device continuously updates the allowable power output according to the calculated second cooling power, enabling flexible adaptation to varying thermal conditions.
2Temperature
If the cooling power is increased to prevent overheating, then the temperature control is improved, but the system complexity increases
Solution Approach 1:
The control device uses the existing cooling circuit and its own operational data to calculate the second cooling power and determine the maximum permissible electric output. The system serves itself by utilizing internal temperature and flow data rather than requiring external complex control systems.
Solution Approach 2:
The system changes the operational parameter (maximum permissible electric output) based on calculated cooling power conditions. By dynamically adjusting this parameter according to thermal state, the system achieves effective temperature control through parameter modulation rather than structural complexity.
3Adaptability or versatility
If the maximum permissible electric output is dynamically adjusted based on cooling power, then the adaptability to ambient conditions is improved, but the control algorithm complexity increases
Solution Approach 1:
The control device pre-calculates the second cooling power based on the actual cooling power data before determining the maximum permissible electric output. This preliminary calculation of thermal capacity allows the system to proactively set appropriate power limits rather than reactively responding to overheating.
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
The system effectively stabilizes fuel cell operation by dynamically controlling electric output in response to ambient conditions, reducing the risk of overheating and extending the system's lifespan.
Implementation Method 1
a cooling circuit having a fuel cell assembly and at least one cooler which is fluidically connected to the fuel cell assembly
Implementation Method 2
The actual cooling power is higher at low ambient temperatures than at high ambient temperatures
Data Source
AI summary
A fuel cell system for a vehicle includes a cooling circuit with a fuel cell assembly and at least one cooler which is fluidically connected to the fuel cell assembly, a data ascertaining device which is designed to ascertain first data that represents a first cooling power of the cooler, and a controller. The first cooling power is an actual cooling power, wherein the controller is designed to obtain the first data, ascertain second data on the basis of the first data, determine a maximally permissible electric output of the fuel cell assembly on the basis of the second data, and control the electric output to be produced by the fuel cell assembly such that the electric output is at least temporarily at most as high as the maximally permissible electric output. The second data represents a second cooling power of the cooler at a specified maximally permissible temperature of a coolant designed to circulate in the cooling circuit. A vehicle, a method, and a computer program are also described.