Vehicle Battery Temperature Regulation via Dynamic Fan Control
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Solution Overview
Problem
Temperature fluctuations in the engine compartment of vehicles, caused by environmental and operational factors, negatively impact battery efficiency and lifespan by causing batteries to operate outside their recommended temperature range.
Innovation Solution
A temperature regulating system for vehicle batteries, comprising a fan, duct, and battery box, which selectively generates airflow based on battery temperature and vehicle speed to maintain the battery within a standard operating range, using active cooling or warming airflow and passive ram air during vehicle movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the fan operates continuously to cool the battery, then the battery temperature is maintained within the recommended range, but energy consumption increases
Solution Approach 1:
The fan operation is made dynamic by adjusting its rotational speed based on real-time battery temperature measurements and vehicle speed conditions. The controller varies the fan speed from low to high or from high to low depending on whether the battery temperature is above or below the recommended range, rather than operating continuously at fixed speed.
Solution Approach 2:
The fan operates periodically rather than continuously, being activated only when the battery temperature exceeds the recommended range or when specific vehicle speed conditions are met. The controller monitors temperature continuously and activates the fan only during periods when cooling is required, reducing overall energy consumption.
2Productivity
If the fan operates at high speed to cool the battery quickly, then temperature regulation efficiency improves, but noise and energy consumption increase
Solution Approach 1:
The fan speed is dynamically adjusted based on the degree of temperature deviation from the recommended range and vehicle speed conditions. The controller selects from multiple operational modes (low speed, high speed, or off) to match the actual cooling demand, achieving efficient temperature regulation without unnecessary high-speed operation.
Solution Approach 2:
The system changes the operational parameters of the fan (rotational speed) based on varying conditions including battery temperature deviation magnitude and vehicle speed. This allows the fan to operate at optimal speed for each situation, balancing cooling efficiency with energy consumption.
3Use of energy by moving object
If the battery is exposed to ambient air for cooling during vehicle movement, then passive cooling reduces energy consumption, but cooling effectiveness decreases at low vehicle speeds
Solution Approach 1:
The system dynamically switches between passive cooling (relying on vehicle movement) and active cooling (fan operation) based on real-time vehicle speed and battery temperature conditions. At low vehicle speeds where passive cooling is insufficient, the controller activates the fan to maintain effective temperature regulation.
Solution Approach 2:
The temperature regulation system serves multiple functions: passive cooling during high-speed vehicle movement, active cooling when the fan operates, and transition between these modes. This multi-functionality allows the system to maintain battery temperature across varying vehicle speed conditions without continuous fan operation.
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
Effectively regulates battery temperature across various conditions, enhancing efficiency and extending battery life by maintaining it within the recommended range, both in warm and cold conditions.
Implementation Method 1
a fan capable of being selectively activated to rotate in a forward rotational direction or a reverse rotational direction for generating an airflow to the battery
Implementation Method 2
The duct is configured to supply cooling airflow to the battery during movement of the vehicle by transporting air that is rammed into the second end of the duct
Data Source
AI summary
A temperature regulating system for regulating the temperature of a battery in a vehicle. The system regulates airflow to the battery for cooling or warming the battery based on the speed of the vehicle and the temperature of the battery. The system provides active cooling airflow to the battery when the battery temperature is above a recommended temperature range, or when the battery temperature is within the recommended temperature range and the speed of the motor vehicle is below a speed threshold. The system provides passive cooling airflow when the battery temperature is within the recommended temperature range and the speed of the motor vehicle is above a speed threshold. The system provides active warming airflow when the battery temperature is below the recommended temperature range.