Download R2-06-04

CNSE Technology Management
Non-Confidential Description: CNSE Case #R2-06-04
Invention Title: Direct Powering of Implantable Bio-medical Devices with ThermoElectric Generator
Keywords: Power generation, thermo-electrics, thermal energy, thermo-electric
generator, nano-generator, bio-devices, implantable device, pacemaker, living
organism, patient data chip
Intellectual Property Status: Invention Disclosure
Inventor(s): Dr. Pradeep Haldar; Dr. Harry Efstathiadis
Invention Description: A thermoelectric generator is a device that uses small
temperature differences to generate electricity. For this application, the device must be
as small and efficient as possible; and utilizing nanoengineering techniques allows us to
do that. Two dissimilar materials, p-type (boron carbide layers) and n-type (silicon and
silicon carbide multi-layers), are layered between different conductors. Each layer is
approximately 10 nanometers.
Using superlatticing technology (multi-layering films), efficiency of a nanogenerator is
increased four times the current technology using bulk materials. This increase in
efficiency is estimated to decrease the nanogenerator cost by half. The nanogenerator
needs only a very slight temperature gradient in order to create 10-40 microwatts, the
amount needed to power a pacemaker. Additionally, the device will include a polarity
reverser, so that if the person travels to a hot climate, the generator will not reverse to
become a cooling device.
A voltage polarity reverser and voltage control circuits are used to ensure that power is
generated regardless of whether Tc (skin temperature) is higher or lower than Th (inner
body temperature). The implant device comprises of a biocompatible primary case
housing the bio-generator, a polarity reversal unit, a voltage regulator, a power monitor,
and the implantable device data-chip, pacemakers, stimulators, drug infusion pumps
etc. Since the bio-generator and the associated control units will be included within the
implantable device enclosure, no FDA class III approval is needed for the bio-generator
and the associated electronics, i.e. no clinical trials to human subjects and animals
needed.
CNSE Technology Management
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