Abstract
Portable flexible electronic devices are receiving much attention for their flexible, portable, and wearable characteristics. The performance of such devices depends on the performance of the flexible battery to a great extent. The resistance of the battery is an important index of performance and a series of tests show that the resistance increases during deformation of the battery. In investigating how the mechanical behavior affects the resistance of the battery and optimizes the battery structure, a finite element model is developed to analyze the properties of the flexible-cable battery from a mechanical view. The model is used to analyze the mechanical behaviors of a wire-cable-type battery when the battery is solely subject to axial stretching, bending, or torsion. Effects of the cable lay angle and friction coefficient are considered. Effects of different loads on the resistance are presented considering the relationship between the strain and resistance. Simulation results show that the effect of the friction coefficient can be ignored. When the battery bears different loads, different lay angles are suggested for good flexibility and a small increase in resistance.
Highlights
Portable electronic products, especially portable flexible electronic products, are attracting attention for their promising advantages and prospects.1–4 Many research teams have put forward concepts of flexible electronics and several prototypes, such as bendable and transparent smart phones and wearable functional sports bracelets, have been manufactured
The present paper presents a finite element model for simulation of a mechanical analysis when a flexible-cable battery is applied to axial tension, bending moment, and torsion
This paper presented a finite element model of the flexible-cable battery for mechanical analysis
Summary
Especially portable flexible electronic products, are attracting attention for their promising advantages and prospects. Many research teams have put forward concepts of flexible electronics and several prototypes, such as bendable and transparent smart phones and wearable functional sports bracelets, have been manufactured. Several types of flexible battery shape have been designed using different materials and structures, such as stretchable wave microfilms, knitted fabric, stretchable wave metal fibers, bridge-island structures, springs or twisting cables. Zhang et al utilized the spring structure or twisting structure to create new flexible battery that was set outside the device wearing on the human body rather than in the device.. Zhang et al utilized the spring structure or twisting structure to create new flexible battery that was set outside the device wearing on the human body rather than in the device.12–14 This wire-type battery may facilitate the realization of wearable devices because. The present paper presents a finite element model for simulation of a mechanical analysis when a flexible-cable battery is applied to axial tension, bending moment, and torsion. This wire is a singlehelix wire and its centerline is given by Cartesian parametric equations:
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