Inductive Charging Air Shaft for Cooling Shielded Power Electronics
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Solution Overview
Problem
Existing stationary induction charging devices face challenges in efficiently cooling power electronics while maintaining a compact and stable design, as conventional air cooling methods are not feasible due to electromagnetic interference and space constraints.
Innovation Solution
The air cooling device incorporates a metal shaft wall within the device housing that guides air flow, coupled with heat exchanger structures such as fins and heat pipes to transfer heat from power electronics components to the air flow, while providing electromagnetic shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional air cooling devices are used to cool power electronics, then heat dissipation is achieved, but electromagnetic shielding is compromised and device height increases
Solution Approach 1:
The patent combines electromagnetic shielding and heat dissipation functions into a single integrated shaft structure. The shaft wall made of metal provides electromagnetic shielding while heat exchanger elements (fins, heat pipes) attached to the shaft enable heat dissipation, eliminating the need for separate cooling devices that would compromise shielding.
Solution Approach 2:
The shaft structure serves multiple functions simultaneously: it provides electromagnetic shielding, guides air flow for cooling, and acts as a heat transfer pathway through its metal construction and attached heat exchanger elements. This multi-functionality resolves the contradiction by achieving both shielding and cooling through one component.
2Volume of moving object
If the device housing is made compact to improve drivability, then stability and drivability improve, but heat dissipation capability deteriorates
Solution Approach 1:
The patent extends the shaft in the vertical dimension to provide sufficient heat dissipation surface area without increasing the horizontal footprint. The shaft length in the vertical direction allows for extended heat exchanger surfaces (fins, heat pipes) that dissipate heat effectively while maintaining a compact overall device volume suitable for drivability.
3Object-affected harmful factors
If shielding encloses power electronics on all sides, then electromagnetic protection is maximized, but air cooling capability is eliminated
Solution Approach 1:
The shaft acts as an intermediary structure that penetrates the shielding enclosure. It provides a controlled pathway for air flow through the shielded region while its metal construction maintains electromagnetic shielding. The shaft wall transfers heat from power electronics to the passing air, enabling cooling without compromising shielding integrity.
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 effectively dissipates heat from power electronics components, maintaining compactness and stability, and ensures efficient cooling without interfering with the electromagnetic field.
Implementation Method 1
electrical energy can be transferred from the stationary induction charging device to the mobile induction charging device by means of induction, i.e. via an electromagnetic alternating field
Implementation Method 2
the heat from the relevant components of the power electronics is transferred via the outside of the wall to the shaft wall and dissipated by the air flow on the inside of the wall. Since the shaft wall is made of metal, it forms a good heat conductor.
Implementation Method 3
the heat from the relevant components of the power electronics is transferred via the outside of the wall to the shaft wall and dissipated by the air flow on the inside of the wall
Data Source
AI summary
A stationary induction charging device for an inductive vehicle charging system for charging the battery for a battery-electric vehicle is disclosed. The charging device includes a device housing, at least one coil in the device housing, a power electronics in the device housing, and an air cooling device. The air cooling device has at least one air shaft running into the device housing for guiding air, at least one fan for driving the air, at least one air inlet fluidically connecting the at least one air shaft to the surroundings, and at least one air outlet fluidically connecting the at least one air shaft to the surroundings. The air shaft comprises at least one heat transfer area, in which a shaft wall is coupled to an exterior wall facing away from the interior wall with at least one component of the power electronics.