Fuel Cell Control System Temperature-Based Charging Rate Adjustment
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Solution Overview
Problem
Existing fuel cell systems do not adequately consider changes in battery electric storage capacity due to external environmental changes, which can lead to inefficient power supply and potential battery protection issues when switching between efficiency priority driving and output limited driving or power generation stoppages.
Innovation Solution
A fuel cell system with an integrated or attached temperature sensor and control device that manages power generation by performing first and second control modes, adjusting the charging rate of the electrical storage device and power generation amount based on temperature and charging thresholds, and includes a heating mechanism to maintain optimal battery conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the fuel cell maintains a predetermined power generation amount regardless of temperature, then power supply efficiency is improved, but battery protection is compromised due to insufficient consideration of temperature-dependent storage capacity
Solution Approach 1:
The control device dynamically adjusts the power generation amount of the fuel cell based on real-time temperature conditions. When temperature is below the predetermined threshold, the control device reduces the power generation amount from the standard level to an adjusted lower level, making the system adaptive to temperature variations rather than maintaining a fixed power generation amount
Solution Approach 2:
The temperature sensor provides continuous feedback on the battery temperature to the control device. The control device uses this feedback information to determine whether to apply the temperature correction to the power generation amount, creating a closed-loop control system that responds to actual battery conditions
2Power
If the fuel cell operates at high power generation amount to increase charging rate, then power supply capability is improved, but battery damage risk increases under low temperature conditions
Solution Approach 1:
The control device preemptively reduces the power generation amount when low temperature is detected, before battery damage can occur. By applying the temperature correction in advance when temperature falls below the threshold, the system prevents harmful charging conditions rather than reacting after damage occurs
Solution Approach 2:
The control device changes the operating parameters of the fuel cell based on temperature conditions. Specifically, it adjusts the power generation amount parameter from the standard value to a temperature-corrected value when temperature is low, thereby changing the charging rate to a safe level that prevents battery damage
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
Enables efficient power supply to external devices while protecting the battery by optimizing power generation efficiency and extending the lifespan of fuel cell components, particularly under varying temperature conditions.
Implementation Method 1
an electrical storage device with a temperature sensor built thereinto or attached thereto
Implementation Method 2
a heating part provided at a position at which heat is transferred to the electrical storage device and configured to generate heat using the electric power supplied from the electrical storage device
Data Source
AI summary
A fuel cell system includes fuel cell, an electrical storage device that stores electric power generated by the fuel cell, and a control device that controls generation of power by the fuel cell, that acquires a charging rate of the electrical storage device, when the electric power in the electrical storage device is supplied to external devices, the control device performs first control which increases a charging rate of the electrical storage device and second control which restricts a power generation amount of the fuel cell to be smaller than in the first control and decreases a charging rate of the electrical storage device, and when a temperature detected by the temperature sensor is lower than a predetermined temperature, a power generation amount per hour of the fuel cell in the first control is reduced in comparison when the detected temperature is equal to or greater than the predetermined temperature.