Battery Pack Pressure Control for Swelling and Aging Stability
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Solution Overview
Problem
Battery degradation issues such as capacity fading, impedance growth, and dimensional changes like swelling are not adequately addressed in existing battery systems, particularly in XR and wearable devices, which require better ergonomics and design for all-day wearability.
Innovation Solution
Integration of a pressure control device within the battery pack to manage pressure, using compressible foam or elastomer insulation around the battery cells, maintaining consistent performance and protecting against mechanical stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If battery cells are installed in battery packs for XR and wearable devices, then power supply capability is improved, but battery degradation issues such as capacity fading, impedance growth, and dimensional changes occur
Solution Approach 1:
The patent applies beforehand cushioning by installing compressible foam or elastomer insulation around battery cells before they undergo degradation. This pre-installed protective material cushions the cells against mechanical stress and maintains dimensional stability, preventing capacity fading and impedance growth that would otherwise occur during battery operation in XR and wearable devices.
2Volume of moving object
If battery packs are designed for compact XR and wearable devices, then device portability is improved, but mechanical stress on battery cells increases causing degradation
Solution Approach 1:
The patent employs flexible shells and thin films by using compressible foam or elastomer insulation that conforms to the battery cell geometry. This flexible protective layer absorbs and distributes mechanical stress throughout the battery pack, protecting cells from degradation while maintaining a compact form factor suitable for XR and wearable devices.
3Object-affected harmful factors
If compressible foam or elastomer insulation is added around battery cells, then mechanical protection is improved, but device weight increases
Solution Approach 1:
The patent utilizes porous materials by selecting compressible foam insulation with optimized cell structure and density. The porous foam provides effective mechanical protection and stress distribution while maintaining low density, thereby protecting battery cells from degradation without significantly increasing the overall weight of XR and wearable devices.
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 solution enhances battery reliability by reducing capacity fading, impedance growth, and dimensional instability, enabling efficient packing and improved mechanical stability, thus supporting better industrial design for XR and wearable systems.
Implementation Method 1
the pressure control device may include foam and/or elastomer insulation compressed around at least a portion of the battery pack
Implementation Method 2
compressible foam or elastomer insulation around the battery cells, maintaining consistent performance and protecting against mechanical stress
Data Source
AI summary
In this disclosure, a battery pack/module with pressure control device integrated has been introduced to provide more efficient packing in system. This design reduces and deaccelerates fading/aging, impedance growth, and dimensional instability over product life. Moreover, it also helps protect the battery from damage with improved reliability. This technology enables better industrial design, e.g., for XR and wearable systems.