Bendable Secondary Battery Assembly for Narrow Wearable Spaces
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Solution Overview
Problem
Portable and wearable electronic devices face challenges in incorporating high-capacity secondary batteries due to size and weight constraints, requiring innovative solutions for efficient placement and weight distribution, especially in devices with complex shapes that need to fit individual body contours.
Innovation Solution
A transformable secondary battery design that can be elongated and bent, allowing efficient placement in narrow spaces and adjustable weight balance, integrated into electronic devices such as glasses-type devices, headset-type devices, and armband devices, using flexible materials and advanced manufacturing methods to ensure reliability and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a high-capacity secondary battery is incorporated to extend usage time, then the duration of action is improved, but the size and weight of the electronic device increase
Solution Approach 1:
The secondary battery is divided into multiple battery elements that can be independently arranged and configured. This segmentation allows the battery capacity to be optimized for extended usage time while distributing the weight across multiple smaller units that can be strategically placed to minimize overall device weight impact.
Solution Approach 2:
The battery elements are arranged in a three-dimensional configuration within the device housing rather than a simple linear or planar arrangement. This spatial optimization allows maximum battery capacity to be packed into the available volume without proportionally increasing device weight, as the arrangement optimizes volume utilization.
2Volume of moving object
If multiple small coin-type lithium-ion secondary batteries are provided to fit limited space, then the volume of the battery is reduced, but the device complexity increases due to complicated connections
Solution Approach 1:
Multiple battery elements are electrically connected and structurally integrated into a unified battery assembly. The connection structure combines the individual battery elements with common terminals and housing, reducing the number of separate connection points and simplifying the overall electrical architecture compared to treating each battery element as an independent component.
Solution Approach 2:
The battery assembly structure serves multiple functions simultaneously: it provides electrical connection for all battery elements, mechanical support and positioning, thermal management pathways, and structural integration with the device housing. This multi-functionality reduces the need for separate components and simplifies the overall design.
3Volume of moving object
If a transformable secondary battery is used to fit narrow and elongated spaces, then the volume utilization is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The transformable battery is constructed from multiple modular battery elements that can be independently manufactured with standard precision tolerances. These segments are then assembled into the final elongated configuration, allowing each component to be manufactured separately with conventional precision while achieving the complex final shape through assembly rather than requiring the entire battery to be formed in one precision-critical process.
Data Source
AI summary
A wearable device needs to have a design corresponding to complicated surfaces of human bodies. Thus, an electronic device that can fit the characteristics of each individual human body after being purchased and can be worn naturally and comfortably is provided. The electronic device includes a secondary battery which can be transformed. By using a secondary battery which can be transformed, for example, a secondary battery can be efficiently placed in a narrow and elongated space in the electronic device, and the elongated secondary battery can be bent together with the electronic device. Furthermore, the weight balance of the electronic device can be easily adjusted.