Fuel Cell Work Vehicle Power Control Using Route Topography
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Solution Overview
Problem
Existing control systems for work vehicles powered by fuel cells struggle to appropriately determine and manage electric power output, especially in varying topography and load conditions, leading to inefficient energy distribution between the fuel cell and battery.
Innovation Solution
A control system that includes a route determination unit, electric power determination unit, fuel cell control unit, and battery control unit to dynamically adjust the fuel cell's electric power output and battery charging/discharging based on the work vehicle's traveling route and topography, ensuring optimal energy management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If constant electric power is output from the fuel cell at all times (range extender method), then the fuel cell operation is simplified, but the energy management becomes inefficient when traveling route and load conditions vary
Solution Approach 1:
The patent implements dynamic adjustment of fuel cell output power based on real-time driving conditions, route topography, and battery state of charge. The control device continuously calculates optimal power distribution between fuel cell and battery, transitioning from static constant power output to dynamic adaptive power management that responds to varying load demands and terrain conditions.
Solution Approach 2:
The system incorporates feedback mechanisms where the control device monitors battery charge/discharge states, fuel cell output, and driving conditions to continuously adjust the power distribution strategy. This closed-loop control ensures optimal energy management by adapting to actual operating conditions rather than relying on fixed power output settings.
2Productivity
If the fuel cell output power is adjusted dynamically based on driving conditions, then the energy management efficiency improves, but the control system complexity increases
Solution Approach 1:
The control device performs preliminary calculations of optimal fuel cell output power based on predicted driving conditions and battery state before actual power demands occur. By pre-computing power distribution strategies and preparing control commands in advance, the system achieves dynamic optimization without requiring overly complex real-time control mechanisms.
3Productivity
If the battery charge rate is maintained at desired levels under fluctuating loads, then the energy distribution is optimized, but the control precision requirements increase
Solution Approach 1:
The control system automatically monitors and adjusts battery charge/discharge operations based on real-time state of charge measurements and predicted power demands. The device self-regulates the fuel cell output and battery current to maintain optimal charge rates, eliminating the need for manual intervention and reducing the burden on external control systems while achieving precise charge rate management.
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 system effectively determines and manages electric power output by the fuel cell, optimizing energy distribution and maintaining desired battery charging rates, even under fluctuating load conditions, thereby enhancing the work vehicle's operational efficiency.
Implementation Method 1
A work vehicle on which a fuel cell using hydrogen gas as a fuel is mounted
Implementation Method 2
a battery to suppress a mounted amount of the fuel cell and to absorb regenerative electric power when traveling downhill
Data Source
AI summary
A route determination unit determines a traveling route of a work vehicle on a work site. An electric power determination unit determines a target electric power generation of a fuel cell during traveling on the traveling route based on topography of the traveling route. The work vehicle controls the fuel cell such that the target electric power generation is output during traveling on the traveling route and controls charging or discharging of a battery based on a difference between required electric power needed for driving the work vehicle and the target electric power generation.