EV Fast-Charging Cooling Noise Control by Ambient Sound
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Solution Overview
Problem
Fast charging of electric vehicles generates significant heat, leading to increased operating noise from cooling systems, which can be annoying, especially in quiet environments, and often requires throttling that compromises charging speed.
Innovation Solution
An intelligent noise regulation method using existing vehicle sensors, such as cameras and microphones, to assess ambient noise levels and adjust the cooling system's noise emissions based on the vehicle's key proximity, ensuring efficient cooling without excessive noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high charging power is used to accelerate charging, then charging speed is improved, but heat generation increases causing thermal derating of components
Solution Approach 1:
The cooling system is activated before fast charging begins and maintains predetermined operating parameters during charging. This preliminary preparation and continuous maintenance of cooling capacity prevents thermal derating of high-voltage components, enabling sustained high charging power without temperature-related throttling.
2Productivity
If cooling fan speed is increased to enhance heat dissipation, then charging speed is improved, but operating noise increases
Solution Approach 1:
The cooling system operates with dynamically adjusted parameters based on charging phase and ambient conditions. During pre-charging and charging phases, the system maintains predetermined operating parameters that balance heat dissipation with noise generation, allowing efficient cooling while minimizing acoustic discomfort in the surrounding environment.
3Object-generated harmful factors
If cooling system is throttled to reduce noise, then noise levels are improved, but heat dissipation decreases compromising charging speed
Solution Approach 1:
The cooling system is activated and maintained at predetermined operating parameters before and during fast charging to ensure adequate heat dissipation capacity is available when needed, preventing the need to throttle cooling during charging which would compromise charging speed.
Solution Approach 2:
The system continuously monitors temperature of high-voltage components and adjusts cooling system operation accordingly. This feedback mechanism ensures that cooling capacity is maintained at levels necessary to support fast charging while optimizing noise levels, preventing thermal derating without excessive noise generation.
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
This approach allows for faster charging while maintaining acceptable noise levels, protecting high-voltage components from overheating and enhancing user experience by balancing charging speed and acoustic comfort.
Implementation Method 1
a cooling fan and a coolant circuit that thermally connects the high-voltage components of the vehicle to a heat dissipation device, such as a radiator or condenser
Implementation Method 2
a coolant circuit that thermally connects the high-voltage components of the vehicle to a heat dissipation device
Implementation Method 3
a cooling fan and a coolant circuit that thermally connects the high-voltage components of the vehicle to a heat dissipation device, such as a radiator or condenser
Data Source
AI summary
A method is provided for charging a vehicle (10) with high-voltage components (11) at a fast-charging station (20). The method includes ascertaining a prevailing noise level around the vehicle (10) while operating noise (21) produced by the vehicle (10) itself during charging is suppressed. The method continues by determining a volume of the operating noise (21) that is tolerable for the driver (22) and bystanders (23) depending on the noise level and a measured distance of a vehicle key (24) from the vehicle (10). The method proceeds by cooling the high-voltage components (11) of the vehicle (10) that are heated by charging so that the operating noise (21) caused by the cooling is limited to the tolerable volume.