Smart Watch Strap Battery Layout for Longer Runtime
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Solution Overview
Problem
Conventional smart watches have limited battery installation space due to their compact design, leading to short battery life and frequent charging needs, as they integrate more functions with limited battery capacity.
Innovation Solution
Incorporating all-solid-state batteries embedded in watch straps, connected in parallel via hinge coupling units to the power supply unit in the watch head, allowing for extended battery life without expanding the watch head's internal space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the battery capacity is increased to extend battery life, then the battery lasting time is improved, but the watch head size must be expanded which increases the overall device size
Solution Approach 1:
The battery system is segmented into two parts: a small battery in the watch head and larger battery modules distributed in the watch strap. This allows the energy capacity to be expanded without increasing the watch head volume, as the additional battery capacity is placed in separate strap modules that connect to the watch head.
2Adaptability or versatility
If more functions are added to the smart watch, then the functionality is improved, but the battery installation space is reduced and battery consumption increases
Solution Approach 1:
The energy storage capacity is extended in the dimensional direction of the watch strap rather than expanding within the two-dimensional constraint of the watch head. By placing battery modules in the strap (extending outward from the watch head), the system provides additional energy capacity to support more functions without consuming additional space within the watch head itself.
3Device complexity
If a conventional battery is used in the watch head, then the device structure is simple, but the battery is vulnerable to damage from impact and high temperature
Solution Approach 1:
The battery system is divided into a small protected battery in the watch head and additional battery modules in the strap. The primary safety-critical battery remains simple and protected in the head, while additional capacity modules in the strap can absorb impact and thermal stress, protecting the main battery while providing redundancy.
Data Source
AI summary
A watch strap and a smart watch includes: a plurality of strap blocks arranged consecutively in one direction; and a plurality of hinge coupling units pivotably coupled to both sides of the plurality of strap blocks to integrally connect the plurality of strap blocks to each other. An all-solid-state battery having electrode terminal units on both sides thereof is embedded in at least one of the plurality of strap blocks. At least one of the plurality of hinge coupling units is electrically connected to one of the electrode terminal units.