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A Wearable Electrodynamic Charging Device for Portable Products

IP.com Disclosure Number: IPCOM000004612D
Original Publication Date: 2001-Feb-28
Included in the Prior Art Database: 2001-Feb-28
Document File: 2 page(s) / 317K

Publishing Venue

Motorola

Related People

John Sawinski: AUTHOR [+2]

Abstract

A Wearable Electrodynamic Charging Device for Portable Products

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A Wearable Electrodynamic Charging Device for Portable Products

John Sawinski and James T. Davis II

This device is a solution for converting human motion, i.e., flexing, standing, walking, etc., to electrical energy in order to charge a battery in a portable wireless subscriber product.

Any differential displacement of a low-viscosity liquid in two flexible silicon rubber bladders causes a magnet, trapped in the interconnecting cylinder, to move through a coil of wire, generating a small amount of current for charging purposes.

Depending on the scale and placement of the device, typical energy production will be on the order of 0.01 0.1 Joule/cycle.

The concept can be applied to almost any wearable topology, including sewn into garments, part of a holster, integrated into a product housing in contact with the wearer, etc. The bladder shape, symmetry, and size can be almost anything.

Electrical contact with the subscriber unit where the charging device is not an integral part, could be by induction or contact patches near the beltline, for example.

One advantage of this system over other wearable charging technologies, like piezoelectric, for example, is the durability of the device through washing processes.