Fuel Cell Launch Control Using Air Compressor Pre-Boost
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Solution Overview
Problem
Fuel cell vehicles exhibit slower responsiveness to launch control due to the time required for air compressor activation, air diffusion, and electrochemical reactions, resulting in longer times to reach top speed compared to internal combustion engine or electric vehicles.
Innovation Solution
A fuel cell vehicle control method that includes a controller to increase air compressor speed, charge the battery through the fuel cell stack output, and adjust auxiliary device power consumption to optimize launch control, ensuring the system can reach maximum output quickly by managing air flow and battery charging levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the air compressor is activated and the electrochemical reaction is allowed to proceed at normal speed, then the system stability and component durability are maintained, but the time to reach top speed increases due to slow responsiveness
Solution Approach 1:
The control unit pre-charges the battery through the fuel cell stack before launch control is activated. This preliminary charging action ensures that sufficient electrical energy is available immediately when launch control is needed, reducing the time delay associated with electrochemical reaction initiation and air compressor activation.
Solution Approach 2:
The control unit dynamically adjusts the driving speed of the air compressor based on vehicle operating conditions. During launch control, the air compressor is driven at higher speeds to increase air supply rate to the fuel cell stack, thereby reducing air diffusion time and accelerating the electrochemical reaction process to achieve faster top speed.
2Productivity
If the air compressor driving speed is increased to reduce activation time, then the responsiveness to launch control is improved, but the power consumption and system stress increase
Solution Approach 1:
The control unit dynamically adjusts the air compressor driving speed based on real-time vehicle conditions and launch control requirements. The speed is increased only when needed for rapid acceleration, and reduced during normal operation, optimizing the balance between responsiveness and energy consumption.
Solution Approach 2:
The control unit continuously monitors battery charging levels, air compressor operation status, and vehicle speed to adjust air compressor driving speed in real-time. This feedback mechanism ensures the air compressor operates at optimal speeds to minimize energy consumption while maintaining required responsiveness for launch control.
3Speed
If the battery is charged at high rate through fuel cell stack output to prepare for launch control, then the launch control function activation time is reduced, but the charging time under normal conditions increases
Solution Approach 1:
The control unit initiates battery charging through the fuel cell stack in advance of launch control activation. By pre-charging the battery when vehicle conditions are favorable, the system ensures sufficient energy is available immediately when launch control is requested, reducing activation delay without requiring continuous high-rate charging.
Solution Approach 2:
The control unit dynamically adjusts the battery charging rate based on vehicle operating conditions. During normal operation, charging occurs at moderate rates to maintain battery readiness. When launch control is anticipated or requested, the charging rate is increased to ensure maximum power availability, optimizing the balance between charging time and launch readiness.
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
Improves the responsiveness of fuel cell vehicles during launch control, enabling faster acceleration from a standstill by optimizing air compressor operation, battery charging, and power management, thus enhancing rapid acceleration performance.
Implementation Method 1
A fuel cell refers to a device for generating electric energy through an electrochemical reaction inside a fuel cell stack by using hydrogen and air supplied from the outside
Implementation Method 2
Specifically, electrochemical oxidation of hydrogen occurs at the fuel electrode
Implementation Method 3
electrochemical reduction of oxygen occurs at the air electrode
Implementation Method 4
The air supply system activates an air compressor so as to supply suctioned outer air to the cathode (air electrode) of the fuel cell stack
Implementation Method 5
fuel cell vehicles have lower responsiveness than other kinds of vehicles, thereby posing a problem in that a longer time is taken to reach the top speed
Implementation Method 6
The fuel supply system decompresses compressed hydrogen in a hydrogen tank and supplies the same to the anode (fuel electrode) of the fuel cell stack
Implementation Method 7
hydrogen ions are separated through a catalyst reaction at the fuel electrode
Implementation Method 8
The separated hydrogen ions are delivered to the cathode (air electrode) through an electrolyte membrane
Data Source
AI summary
A fuel cell vehicle includes a fuel cell stack, an air compressor configured to supply air to the fuel cell stack, and a controller configured to increase air compressor driving at a launch control function activation request, charge a battery through an output of the fuel cell stack, thereby preparing to activate a launch control function, and output a signal indicating that the launch control function can be activated when the output of the fuel cell stack or the amount of charging of the battery has reached a preset value.