Hearing Instrument Battery-Coil Layout for Low Magnetic Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge is to compactly arrange a powerful rechargeable battery and an inductive transmitting and/or receiving coil in a hearing instrument without the battery's parasitic magnetic fields interfering with the coil, given the limited space in the instrument's housing.
Innovation Solution
A stack-designed rechargeable battery is aligned orthogonally to the coil's axis, allowing for a compact and interference-minimized arrangement, where the coil's axis is parallel to the battery's layering plane, and the battery's connection contacts are positioned to minimize magnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a rechargeable battery is integrated into the hearing instrument housing, then the energy supply capacity is improved, but the battery generates parasitic magnetic fields that interfere with the inductive transmitting and/or receiving coil
Solution Approach 1:
The patent applies dimensional separation by orienting the battery and coil in orthogonal spatial relationships. The battery is positioned with its layering plane extending in a first direction, while the coil axis extends in a second direction that is orthogonal to the first direction. This spatial arrangement in different dimensions reduces magnetic field interference while maintaining compact integration within the hearing instrument housing.
2Volume of moving object
If the battery and coil are arranged compactly in the hearing instrument housing, then the device size is reduced, but the magnetic interference between components increases
Solution Approach 1:
The patent resolves the contradiction between compact size and magnetic interference by utilizing orthogonal spatial arrangement. The battery's layering plane and the coil's axis are oriented perpendicular to each other, creating effective spatial separation in different dimensions. This allows both components to be positioned close together within the limited housing volume while minimizing magnetic field coupling through directional orthogonality.
3Object-affected harmful factors
If the coil axis is aligned parallel to the battery layering plane, then magnetic interference is reduced, but the arrangement complexity increases
Solution Approach 1:
The patent employs asymmetric orientation where the coil axis is specifically aligned parallel to the battery layering plane rather than using symmetric radial or axial arrangements. This asymmetric configuration optimizes magnetic field separation by exploiting the directional characteristics of the stack-designed battery's magnetic field distribution, reducing interference while maintaining a relatively simple integrated structure.
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 enables a trouble-free and compact integration of both components, reducing the battery's influence on the coil and allowing for effective signal transmission and reception, even in a small hearing instrument housing.
Implementation Method 1
an inductive transmitting and/or receiving coil
Implementation Method 2
a rechargeable battery, in particular a lithium-ion battery
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A hearing instrument (2) is described, comprising a rechargeable battery (12) and an inductive transmitting and/or receiving coil (14). The battery (12) is designed as a layer stack (24). The transmitting and/or receiving coil (14) is arranged such that its axis (54) is oriented perpendicular to a layering direction (28) of the battery (12).