Patent ID: 9048759
Filing Date: 2015-06-02
Classification: H02N

Abstract:
1. An apparatus for harvesting mechanical vibration/motion energy from a piezoelectric device, the apparatus comprising: an outer flextensional casing; a first cell and a last cell serially coupled to each other and coupled to the outer flextensional casing, each cell having a flextensional cell structure and wherein each cell receives an input force from the outer flextensional casing and provides an output force that is amplified based on the input force; and a piezoelectric stack coupled to each flextensional cell structure of each cell wherein the piezoelectric stack is comprised of multiple piezoelectric layers each connected serially to an electrode and wherein the piezoelectric stack of each flextensional cell structure provides the energy as electrical charges to the electrodes based on the output force received from each cell, wherein the last cell receives an input force that is the output force from the first cell and the last cell provides a first output apparatus force that is the product of the input apparatus force, the output force of the first cell, and the output force of the last cell, wherein the flextensional casing is arranged orthogonally with respect to the first cell and the last cell.