Fuel Cell Power Control for Route Gradient Battery SOC Management
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Solution Overview
Problem
Fuel cell vehicles face challenges in managing battery state of charge through regenerative braking while minimizing fuel cell power generation, especially for heavy trucks traveling at high speeds, which affects fuel efficiency and output supplementation.
Innovation Solution
A system and method that identify the gradient range of a vehicle's traveling route using GPS and navigation maps, controlling battery charging and fuel cell power generation based on weight estimation algorithms to optimize fuel efficiency and maximize regenerative braking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the output of the fuel cell stack is increased to manage the state of charge (SOC) value of the battery, then the SOC management is improved, but the power generation efficiency is degraded, adversely affecting the fuel efficiency
Solution Approach 1:
The system performs preliminary identification of gradient ranges using GPS and navigation map data before the vehicle enters them. Based on this advance information, the control unit pre-adjusts the battery SOC and fuel cell power generation levels, allowing the vehicle to pass through gradients without compromising fuel efficiency while maintaining reliable SOC management.
2Quantity of substance
If the battery has already been charged, then the energy storage capacity is improved, but the battery cannot be charged by regenerative braking
Solution Approach 1:
The control unit continuously monitors battery SOC levels and uses this feedback to dynamically adjust power generation strategies. When approaching full charge, the system reduces fuel cell power output and modulates regenerative braking intensity to prevent overcharging, thereby maintaining both energy storage capacity and regenerative braking functionality.
Solution Approach 2:
The system dynamically adjusts power generation and charging strategies based on real-time conditions including battery SOC, gradient range predictions, and vehicle operating state. This dynamic control allows the battery to transition between charging modes (fuel cell charging, regenerative braking charging) and discharge modes, optimizing both storage capacity utilization and regenerative braking effectiveness.
3Power
If output supplementation through power in the battery is necessary for heavy trucks traveling at high speed, then the vehicle performance is improved, but the fuel efficiency is degraded
Solution Approach 1:
The system identifies gradient ranges in advance using GPS and navigation data, then pre-charges the battery or pre-adjusts fuel cell output before the vehicle enters high-power demand zones. This preliminary action allows the vehicle to maintain high performance during gradients while minimizing overall fuel consumption by avoiding excessive fuel cell power generation during flat, low-demand periods.
Solution Approach 2:
The control unit changes operating parameters of both the fuel cell stack and battery based on predicted gradient conditions. It adjusts fuel cell power output, battery charge/discharge rates, and regenerative braking intensity dynamically, optimizing the balance between vehicle performance and fuel efficiency for heavy trucks operating at high speeds.
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 ensures secure energy for uphill or downhill travel, optimizing fuel efficiency and maximizing regenerative braking by adjusting fuel cell power generation according to identified gradient ranges and vehicle weight, thereby stabilizing vehicle performance.
Implementation Method 1
a fuel cell for producing electrical energy through a reaction between hydrogen and oxygen
Implementation Method 2
a battery for storing the electrical energy produced by the fuel cell
Implementation Method 3
electrical energy generated by regenerative braking performed by the driving motor
Data Source
AI summary
A system and a method for controlling a vehicle fuel cell includes: a gradient identification unit configured to identify a gradient range of an expected traveling route of a vehicle; and a control unit configured to control charging and discharging of a vehicle battery and a degree of power generation by a fuel cell of the vehicle in advance, before the vehicle enters the gradient range, according to whether the gradient range of the expected traveling route identified by the gradient identification unit is uphill or downhill.