Wireless Power Reception Coil Shielding for Multi-Method Charging

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Solution Overview

Problem

Existing wireless power reception devices are limited in their ability to receive power using multiple charging methods due to the need for matching charging methods between the transmission and reception devices, which can lead to contact failures and inefficiencies.

Innovation Solution

A wireless power reception device featuring a mounting member with an inner and outer coil, slits, and shielding members that isolate the coils from other components, allowing for the reception of power using various charging methods such as electromagnetic induction, resonance, and RF/Micro Wave Radiation without performance deterioration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If wireless power reception device uses multiple charging methods, then adaptability is improved, but device complexity increases

Engineering Contradiction:

Improvecharging method compatibilityVSAvoidcoil and shielding structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The wireless power reception device is divided into multiple independent coil units (first coil, second coil, third coil, fourth coil) that can operate independently. Each coil is equipped with its own shielding member, allowing the device to support multiple charging methods (electromagnetic induction, magnetic resonance, RF/Micro Wave Radiation) without requiring a completely separate system for each method.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The shielding members are nested within the coil structures, with each shielding member positioned inside or around its corresponding coil. This nested arrangement allows the shielding components to be integrated into the existing coil architecture rather than adding separate external shielding structures, thereby supporting multiple charging methods while minimizing the increase in overall device complexity.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Reliability

If shielding members are added to protect coils, then reliability is improved, but device complexity increases

Engineering Contradiction:

Improveelectromagnetic interference protectionVSAvoidshielding structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The shielding members are merged with the coil structures by positioning them in direct association with each coil unit. The first shielding member is associated with the first coil, the second shielding member with the second coil, and so on. This merging approach provides electromagnetic interference protection while integrating the shielding function into the existing coil architecture rather than adding completely separate shielding systems.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

Each shielding member is nested within or around its corresponding coil unit, creating a compact integrated structure. This nested arrangement protects each coil from electromagnetic interference while maintaining a space-efficient design where the shielding components occupy the same spatial envelope as the coils themselves, minimizing the overall increase in device complexity.

Inventive Principle:

Principle #7Nested doll (Nesting)

3Ease of operation

If contact terminal is externally exposed for charging, then ease of operation is improved, but reliability deteriorates due to contamination and short circuits

Engineering Contradiction:

Improvecharging accessibilityVSAvoidcontact terminal stability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent replaces the mechanical contact-based charging system with a wireless power reception system. Instead of using exposed contact terminals that require physical connection to charging devices, the system uses electromagnetic fields transmitted through coils to wirelessly transfer power. This substitution eliminates the reliability issues associated with exposed contact terminals (contamination, short circuits, contact failure) while maintaining ease of operation through contactless charging.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

The device efficiently receives power across multiple charging methods, improving the overall efficiency of the wireless power reception process by shielding the coils and protecting other components from electromagnetic interference.

Implementation Method 1

a first shielding member and a second shielding member laminated on the first shielding member and provided in correspondence with the inner coil

Methodology Applied

Scientific EffectElectromagnetic shielding: Faraday Cage

Implementation Method 2

a wireless power reception device including an inner coil

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS11456614B2Wireless power reception device

Publication Date: 2022.09.27 NERA INNOVATIONS LTD

AI summary

A wireless power reception device can include a first shielding member; a second shielding member; a short-range communication coil on the first shielding member; a wireless charging coil on the second shielding member; and a hole outside the wireless charging coil, in which the hole penetrates through the first shielding member.