Movable Under Panel for EV Battery Cooling and Aerodynamics
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery-equipped vehicles face challenges in improving aerodynamic characteristics while effectively cooling large-capacity batteries mounted under the floor, which can increase vehicle weight and affect efficiency.
Innovation Solution
A movable under panel system with a panel lifting and lowering mechanism, actuator, and control device that adjusts the position of the under panel relative to the battery to optimize airflow for cooling and aerodynamics based on vehicle conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the under panel is fixed in position, then the vehicle structure is simple and aerodynamic characteristics are stable, but the battery cannot be effectively cooled and aerodynamic performance cannot be optimized
Solution Approach 1:
The under panel is designed to move dynamically between a lowered position (for aerodynamic efficiency) and a raised position (for battery cooling). The panel lifting and lowering mechanism enables the under panel to change its position based on operational requirements, transforming a static component into a dynamic one that can adapt to different functional needs.
Solution Approach 2:
The under panel serves multiple functions: it acts as an aerodynamic cover during normal driving, a cooling duct during battery thermal management needs, and provides structural support. By integrating these multiple functions into a single movable component, the design avoids the need for separate dedicated cooling structures.
2Loss of energy
If the under panel is lowered for aerodynamic characteristics, then drag is reduced, but the battery cannot be cooled effectively
Solution Approach 1:
The under panel transitions from a static aerodynamic cover to a dynamic component that can change position. During normal driving, it remains lowered to minimize drag. When battery cooling is required, it raises to create an airflow passage, allowing the same component to serve both aerodynamic and thermal management functions at different times.
Solution Approach 2:
The under panel operates periodically, switching between lowered (aerodynamic mode) and raised (cooling mode) positions based on battery temperature conditions and vehicle speed. The control device monitors parameters and triggers position changes at appropriate intervals, creating a periodic action that optimizes both aerodynamics and cooling.
3Temperature
If the under panel is raised for battery cooling, then airflow to battery is improved, but aerodynamic characteristics deteriorate
Solution Approach 1:
The under panel is designed as a movable component that can raise and lower based on operational requirements. When battery cooling is needed, it raises to create an airflow passage between the battery and external environment. When aerodynamic performance is prioritized, it lowers to maintain a smooth underbody surface, thus dynamically balancing cooling and aerodynamics.
4Quantity of substance
If large-capacity batteries are mounted under the floor, then energy storage capacity increases, but vehicle weight increases and airflow patterns are affected
Solution Approach 1:
The movable under panel system allows the vehicle to compensate for the weight and airflow disruption caused by large-capacity batteries. By dynamically adjusting the panel position, the system optimizes airflow patterns around the battery regardless of its size, enabling effective cooling while maintaining aerodynamic efficiency during normal 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
Enhances vehicle stability and aerodynamic performance by controlling airflow to the battery, improving cooling efficiency and reducing the risk of damage during various driving conditions.
Implementation Method 1
the battery mounted under the floor of the vehicle is cooled by taking traveling air between the battery and an undercover (referred to also as 'under panel') of the vehicle
Data Source
AI summary
A battery-equipped vehicle includes an under panel, a battery, a panel lifting and lowering mechanism, and a control device. The under panel is provided near a bottom surface of the vehicle. The battery is disposed under a floor of the vehicle and above the under panel. The panel lifting and lowering mechanism is configured to lift or lower the under panel in a vertical direction. The control device is configured to control at least an operation of the panel lifting and lowering mechanism.