Wireless Charging Cradle Air Channel for In-Vehicle Heat Dissipation
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Solution Overview
Problem
Existing wireless charging devices for mobile terminals in vehicles face challenges with heat dissipation during the charging process, leading to prolonged charging times and potential damage to the terminal.
Innovation Solution
The charging device incorporates a housing with a support region featuring elevations that form an air channel, along with air inlet and outlet openings, and a barrier to swirl the air, enhancing heat dissipation through turbulent airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If wireless charging is performed using inductive charging, then the electrical energy store of the mobile terminal can be charged, but heat is generated causing the charging electronics and mobile terminal to heat up
Solution Approach 1:
A air channel is introduced as an intermediary cooling path between the mobile terminal and charging electronics. The air channel allows ambient air to flow through and carry away heat from both the mobile terminal and charging electronics, preventing direct heat transfer and reducing overall temperature rise during wireless charging.
Solution Approach 2:
The patent uses pneumatic cooling by introducing air flow through the air channel to remove heat. The air flow acts as a cooling medium that absorbs heat from the charging electronics and mobile terminal, utilizing fluid dynamics principles to manage thermal load during inductive charging.
2Reliability
If cooling mechanisms such as blowers are used to counteract excessive heating, then overheating is prevented, but device complexity increases
Solution Approach 1:
The air channel is designed to utilize natural convection and ambient air flow to cool the charging electronics and mobile terminal without requiring active cooling components like blowers or fans. The structure itself facilitates self-cooling through its geometry and air flow paths, reducing the need for additional active cooling systems.
3Ease of operation
If the mobile terminal is placed on a flat support surface, then ease of placement is improved, but heat dissipation is reduced
Solution Approach 1:
The support surface is segmented into multiple regions including a first support region and a second support region separated by the air channel. This segmentation allows the mobile terminal to be placed on the support regions while maintaining gaps for air flow, enabling both ease of placement and effective heat dissipation through the segmented structure.
4Temperature
If the charging current strength is limited to reduce heating, then temperature control is improved, but charging duration increases
Solution Approach 1:
The air channel provides continuous cooling throughout the charging process, allowing the charging current to be maintained at higher levels without excessive temperature rise. The continuous air flow through the air channel ensures sustained heat removal, enabling faster charging while maintaining temperature control.
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 design improves cooling performance, reducing charging time and preventing overheating, thereby ensuring safer and more efficient charging of mobile terminals in vehicles.
Implementation Method 1
at least one barrier being arranged in the air channel, which barrier is designed to swirl the air blown out into the air channel
Implementation Method 2
the housing has at least one air inlet opening and at least one air outlet opening, the air outlet opening being arranged in the support region and being designed to blow air out into the air channel
Implementation Method 3
an alternating magnetic field generated by a primary coil of the charging device can be used to induce a charging current in a secondary coil located in the mobile terminal
Data Source
AI summary
The present disclosure relates to a device for wireless charging of an electrical energy store of a mobile terminal for a motor vehicle, the device including charging electronics positioned within a housing. The housing includes a support region on which to place the mobile terminal, the support region including at least two elevations, each elevation has a first predetermined height extends along a length of the support region, and is arranged in parallel at a predetermined distance from one another. When the mobile terminal is placed on the at least two elevations, an air channel is formed. The housing includes at least one air inlet opening and at least one air outlet opening configured to blow air out into the air channel. Furthermore, at least one barrier that swirls the air blown out into the air channel is arranged in the air channel.