EV Front Trunk Thermal Layout for Motor Heat Isolation
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Solution Overview
Problem
In electric vehicles, heat generated by the motor can be transferred to the trunk box, potentially affecting the cargo stored there, as there is no engine to dissipate this heat.
Innovation Solution
The integration of a thermal integration unit between the motor and the trunk box, utilizing a heat transfer medium to manage and dissipate heat generated by the motor and other components, thereby preventing heat transfer to the trunk box.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the motor is arranged forward of the passenger compartment without an engine, then the electric vehicle structure is simplified and motor efficiency is improved, but heat generated by the motor is transferred to the trunk box affecting the cargo
Solution Approach 1:
A thermal integration unit is introduced as an intermediary component between the motor and the trunk box. This unit includes a heat exchanger that uses a heat transfer medium to absorb and remove heat from the motor, preventing it from transferring to the trunk box. The thermal integration unit acts as a mediator that manages the thermal interaction between the motor and surrounding components.
Solution Approach 2:
The harmful heat generated by the motor is extracted and separated from the trunk box environment. The thermal integration unit extracts heat from the motor through the heat exchanger and removes it from the system using the heat transfer medium, effectively taking out the harmful thermal energy that would otherwise affect the cargo.
2Volume of moving object
If components are integrated to save space, then vehicle compactness is improved, but heat management becomes more difficult and heat transfer to the trunk box increases
Solution Approach 1:
The motor, power controller, and thermal integration unit are merged into a compact integrated assembly arranged forward of the passenger compartment. This merging of components achieves space efficiency while the integrated thermal management system ensures that heat is properly managed within the compact structure, preventing heat transfer to the trunk box.
Solution Approach 2:
The thermal integration unit serves as a mediating structure between the integrated motor-power controller assembly and the trunk box. It provides thermal isolation while allowing the compact arrangement of components, managing heat flow in the constrained space without allowing harmful heat transfer to the cargo area.
3Area of stationary object
If the battery is arranged under the passenger compartment floor, then passenger compartment space is maximized, but thermal management of the battery and motor becomes more complex
Solution Approach 1:
The thermal management system is segmented into distinct functional units: battery thermal management and motor thermal management. The battery is managed separately under the floor, while the motor has its own dedicated thermal integration unit forward of the passenger compartment. This segmentation simplifies the overall thermal management complexity by dividing it into manageable, independent subsystems.
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 limits the transfer of heat from the motor and other heat sources to the trunk box, maintaining optimal temperatures for both the battery and passenger compartment while ensuring the cargo remains unaffected.
Implementation Method 1
utilizing a heat transfer medium to manage and dissipate heat generated by the motor and other components
Implementation Method 2
manage and dissipate heat generated by the motor and other components, thereby preventing heat transfer to the trunk box
Data Source
AI summary
An electric vehicle includes a motor configured to drive a front wheel using power of a battery, a power controller configured to supply power from the battery to the motor, an integrated electromechanical unit integrating the motor and the power controller, a thermal integration unit in which multiple components are connected and integrated with each other by to a pipe through which a heat transfer medium flows, and a trunk box. The battery is arranged under a floor of a passenger compartment. The motor, the power controller, the thermal integration unit, and the trunk box are arranged forward of the passenger compartment. The trunk box, the thermal integration unit, and the motor are arranged sequentially from front of a vehicle. The thermal integration unit is arranged between the trunk box and the motor.