Patent ID: 8777863

Claim:
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.