Implantable medical device with internal piezoelectric energy harvesting
First Claim
1. A power generation module disposed within a first interior cavity of an implantable medical device, the implantable medical device comprising a housing defining the first interior cavity, wherein a portion of the housing includes a first flexible diaphragm configured to displace into the first interior cavity in response to blood pressure pulses impinging on the first diaphragm, the power generation module comprising:
- a module body, disposed within the first interior cavity, wherein the module body encloses a second interior cavity; and
a second flexible diaphragm spanning the second interior cavity, the second flexible diaphragm including;
a first electrical conductor;
a piezoelectric layer disposed adjacent to the first conductor; and
a second electrical conductor disposed adjacent to the piezoelectric layer;
wherein the piezoelectric layer is configured to displace into the second interior cavity and generate a voltage differential between the first electrical conductor and the second electrical conductor in response to a change in pressure within the first interior cavity, wherein the change in pressure within the first interior cavity is caused by the blood pressure pulses impinging on the first diaphragm, wherein the first interior cavity is filled with air.
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Accused Products
Abstract
Methods, systems, and apparatus for powering and/or recharging medical devices implanted within the body are described. An illustrative power generation module disposable within the interior space of an implantable medical device includes a module body that defines an interior cavity as well as a flexible diaphragm that spans the interior cavity. The flexible diaphragm includes a first electrical conductor, a piezoelectric layer disposed adjacent to the first electrical conductor, and a second electrical conductor disposed adjacent to the piezoelectric layer. The piezoelectric layer is configured to displace within the interior cavity and generate a voltage differential between the first electrical conductor and the second electrical conductor.
53 Citations
10 Claims
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1. A power generation module disposed within a first interior cavity of an implantable medical device, the implantable medical device comprising a housing defining the first interior cavity, wherein a portion of the housing includes a first flexible diaphragm configured to displace into the first interior cavity in response to blood pressure pulses impinging on the first diaphragm, the power generation module comprising:
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a module body, disposed within the first interior cavity, wherein the module body encloses a second interior cavity; and a second flexible diaphragm spanning the second interior cavity, the second flexible diaphragm including; a first electrical conductor; a piezoelectric layer disposed adjacent to the first conductor; and a second electrical conductor disposed adjacent to the piezoelectric layer; wherein the piezoelectric layer is configured to displace into the second interior cavity and generate a voltage differential between the first electrical conductor and the second electrical conductor in response to a change in pressure within the first interior cavity, wherein the change in pressure within the first interior cavity is caused by the blood pressure pulses impinging on the first diaphragm, wherein the first interior cavity is filled with air. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification