Wireless Energy Store Antenna Structure for Orientation-Independent Charging
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Solution Overview
Problem
Current wirelessly rechargeable energy stores face inefficiencies in energy transfer and production complexity due to limitations in induction coil design and antenna structures, which hinder effective and easy charging across various orientations and frequencies.
Innovation Solution
The design incorporates a cylindrical housing with a flexible printed circuit board forming the casing wall, featuring overlapping induction loops and dipoles arranged to optimize energy absorption, allowing for efficient wireless charging regardless of orientation and simplifying production by using a single-layer antenna structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional induction coil design is used, then wireless charging is enabled, but energy transfer efficiency is insufficient
Solution Approach 1:
The antenna structure is divided into multiple overlapping induction loops arranged in different orientations. Each loop segment captures electromagnetic energy from different directions, and their combined effect significantly improves overall energy transfer efficiency compared to a single induction coil.
Solution Approach 2:
The patent transitions from a single-plane induction coil to a three-dimensional arrangement of overlapping loops with different orientations. This spatial dimensionality enhancement allows the antenna to receive electromagnetic energy from multiple angles simultaneously, resolving the efficiency limitation of traditional single-plane designs.
2Loss of energy
If complex antenna structures are used to improve energy absorption, then charging efficiency improves, but production complexity increases
Solution Approach 1:
Multiple induction loops with different orientations are merged into a single integrated antenna structure printed on the flexible circuit board. This unified design achieves complex three-dimensional energy absorption capabilities while maintaining simple manufacturing through single-layer printing technology.
Solution Approach 2:
The overlapping induction loop structure serves multiple functions simultaneously: it acts as the antenna for wireless charging, provides structural support as part of the housing, and enables position-independent charging. This multi-functionality reduces overall device complexity while improving performance.
3Loss of energy
If orientation-specific induction coils are used, then energy transfer is achieved, but position-independent charging is limited
Solution Approach 1:
The patent employs induction loops with deliberately different orientations and asymmetrical arrangements rather than uniform symmetric patterns. This asymmetry allows the structure to effectively capture electromagnetic energy from various incident angles, enabling charging regardless of the device's orientation relative to the charging source.
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 configuration enhances energy transfer efficiency and simplifies production, enabling position-independent charging and compatibility with various small electrical appliances, while reducing production costs and complexity.
Implementation Method 1
The alternating current in the transmitter coil induces an alternating voltage. The alternating voltage in the induction reception means is rectified and fed via a charging electronics to the battery pack
Data Source
AI summary
A wirelessly rechargeable energy store includes a housing, having a casing wall, in which a converter, a storage core, charging electronics and an antenna structure are arranged along a longitudinal axis. The energy store, independently of the relative alignment of antenna structures used with respect to the acting field direction, achieves an increased recharging efficiency and, because of its housing configuration, is diversely usable as a replacement for batteries and battery packs in small electrical devices. The antenna structure comprises at least two induction loops—shaped from an electrically conductive wire—formed as flat coils, which are arranged in a partly overlapping manner on a flexible printed circuit board. The printed circuit board together with the induction loops at least partly encloses the storage core in such a way that loop longitudinal extents run at least approximately parallel to the longitudinal axis and loop transverse extents run at least approximately perpendicularly to the longitudinal axis and a first pole of the induction loops is connected to a first pole of the converter and a second pole of the induction loops is connected to a second pole of the converter.