Wireless Charging Coil Unit Housing with Sensor Stress Isolation
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Solution Overview
Problem
Existing wireless power transmission systems face challenges in maintaining the load-bearing performance of coil units while preventing stress transmission to sensors installed inside the coil unit when external stresses, such as vehicle traffic, are applied.
Innovation Solution
The coil unit design incorporates a housing with a dividing plate and pillars to separate the space for the coil and sensor, ensuring the sensor is supported by pillars and not in direct contact with the housing's inner surface, thereby preventing external stress from being transmitted to the sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the sensor is installed inside the housing without separation structures, then the device complexity is reduced, but the sensor is directly exposed to external stress from vehicle traffic
Solution Approach 1:
The housing internal space is segmented into a coil accommodating space and a sensor accommodating space using a dividing plate. This segmentation isolates the sensor from direct exposure to external stresses while maintaining structural integrity of the housing.
Solution Approach 2:
The sensor is nested within the sensor accommodating space formed by the dividing plate and housing walls, creating a protected internal environment. The pillar further nested within this space provides additional support and stress isolation.
2Device complexity
If the sensor is placed close to the housing inner surface, then the housing structure is simplified, but external stress is transmitted directly to the sensor
Solution Approach 1:
The dividing plate acts as an intermediary structure between the coil space and sensor space, preventing direct stress transmission from the housing to the sensor. The pillar serves as a mediator supporting the sensor at a distance from the housing inner surface.
3Volume of stationary object
If the coil and sensor share the same space, then the housing volume is reduced, but the sensor cannot be protected from stress
Solution Approach 1:
The dividing plate creates a vertical separation within the housing, dividing the internal volume into upper and lower spaces. This dimensional organization allows both coil and sensor to coexist in the same housing while maintaining stress isolation.
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 enhances the load-bearing performance of the coil unit while effectively suppressing stress transmission to the sensor, ensuring reliable operation and preventing damage from external loads.
Implementation Method 1
supplying electric power from a power feeding coil unit installed on a parking space, where a vehicle can be parked, to a power receiving coil unit provided on the vehicle side via a magnetic field
Implementation Method 2
detect that any foreign metals which may be affected by a magnetic field are mixed between the power feeding coil unit and the power receiving coil unit
Data Source
AI summary
A coil unit provided on a ground side, including a coil, at least one sensor for detecting an object existing above or around the coil unit, a housing for accommodating the coil and the at least one sensor, wherein, the housing is provided with a dividing plate and at least one pillar for maintaining the internal space of the space for sensor, the dividing plate divides the space into a space for coil and a space for sensor located vertically above the space for coil, the space for coil is for accommodating the coil and the space for sensor is for accommodating the at least one sensor, and the at least one sensor is disposed on the dividing plate without contacting with an upper inner surface portion of the housing in the space for sensor.