Piezoelectric transducer-based energy harvesting module, in particular for optimized charging of the battery of an implantable medical device such as a leadless autonomous cardiac capsule
US11496071B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2021 |
| Grant date | Nov 8, 2022 |
| Priority date | — |
| Expiry date | Jul 17, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/871
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The module comprises a pendular unit with an elastically deformable piezoelectric beam having a clamped end and an opposite, free end, coupled to an inertial mass. The beam produces an oscillating electrical signal collected by electrodes, which is rectified and regulated to output a voltage for charging a battery. The number and configuration of the electrodes (T1, T2, B1, B2, N) carried by the piezoelectric beam define a plurality of pairs of electrodes between which a corresponding plurality of said oscillating signals can be simultaneously collected. A switching matrix, as a function of an input command, selectively switches the plurality of pairs of electrodes between each other according to a plurality of different series (S), parallel (P) and/or series-parallel (SP) configurations, the selected configuration being that which maximizes the power sent to the battery as a function of the voltage level (VBAT) present at the terminals of the latter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.