IP Library › Granted Patent US 11,791,748
Granted Patent B2
US 11,791,748 · App. 16/681,620 · Granted Oct 17, 2023

Smart wheel energy harvester

Inventors: Ryan Griswold (Los Gatos, CA); John Sze (Saratoga, CA); Vibhu Vivek (Santa Clara, CA)
Assignee: TDK CORPORATION
H02N2/18B60B27/0015B60C23/0411B60C23/0486B60C7/00B60R16/0307
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Quick Facts
Patent No.
US 11,791,748
App. No.
16/681,620
Granted
Oct 17, 2023
Kind
B2
Abstract

Systems and methods for an energy harvester proximate to a rotatable component of a vehicle's wheel are disclosed. In some embodiments, an energy harvester system includes: a substrate having a first surface configured to contact and interface with a surface of a wheel, and a second surface opposite the first surface; a piezoelectric component configured to produce energy in response to mechanical strain imparted on the piezoelectric component, wherein the piezoelectric component is configured to deform while experiencing the mechanical strain so as to contact at least a portion of the second surface.

Claims (33)

1. An energy harvester system, comprising:

a substrate comprising:

a first surface configured to contact and interface with a surface of a wheel, and

a second surface opposite the first surface, wherein the second surface has a curved surface;

a piezoelectric component configured to produce energy in response to mechanical strain imparted on the piezoelectric component, wherein a portion of the piezoelectric component is attached to a first portion of the second surface, the second surface comprising a second portion that is configured to contact the piezoelectric component when mechanical strain is imparted on the piezoelectric component, wherein the second portion is further configured to not contact the piezoelectric component when no mechanical strain is imparted on the piezoelectric component, and wherein the piezoelectric component is configured to deform while experiencing the mechanical strain so as to contact the second portion of the second surface; and

an interconnect conductively coupled to the piezoelectric component, the interconnect being configured to conduct electrical energy from the piezoelectric component to a device coupled to the wheel.

2. The system of claim 1 , wherein the piezoelectric component comprises multiple layers.

3. The system of claim 2 , wherein the piezoelectric component comprises: a tensile load backing layer, a piezoelectric material layer, and an electrode layer.

4. The system of claim 3 , wherein the electrode layer comprises an electrode configured to connect to the interconnect.

5. The system of claim 3 , wherein the electrode is formed in a mesh configuration.

6. The system of claim 3 , wherein the electrode layer is closer to the second surface than the tensile load backing layer.

7. The system of claim 3 , wherein the electrode layer comprises an elongated electrode that traverses a two dimensional space.

8. The system of claim 1 , wherein the first surface is curved in three dimensions along a length, a width, and a height of the substrate.

9. A system, comprising:

a wheel comprising a staging surface formed therein, wherein the staging surface has a curved surface; and

a piezoelectric component configured to produce energy in response to mechanical strain, wherein the piezoelectric component is flat and fixed to a first portion of the staging surface, the staging surface comprising a second portion that is configured to contact the piezoelectric component when mechanical strain is imparted on the piezoelectric component, wherein the second portion is further configured to not contact the piezoelectric component when no mechanical strain is imparted on the piezoelectric component, and wherein the piezoelectric component is configured to deform and contact the second portion of the staging surface while experiencing the mechanical strain.

10. The system of claim 9 , wherein the wheel comprises a rim, and wherein the staging surface is part of a depression along the rim.

11. The system of claim 9 , wherein the piezoelectric component comprises a piezoelectric material layer between two electrode layers.

12. The system of claim 11 , wherein the two electrode layers comprise different mesh structures.

13. The system of claim 9 , wherein the wheel has a spherical shape.

14. The system of claim 9 , wherein the piezoelectric component comprises a piezoelectric material that is least one of: a crystal and semiconductor material or a polymer and organic material.

15. The system of claim 9 , wherein the wheel comprises an airless tire and the staging surface is along a spoke of the airless tire.

16. A method, comprising:

rotating a wheel, wherein the wheel comprises a staging surface formed in the wheel, wherein the staging surface has a curved surface;

deforming a piezoelectric component, wherein the piezoelectric component configured to produce energy in response to mechanical strain, wherein the piezoelectric component is flat and fixed to a first portion of the staging surface, and wherein the piezoelectric component is configured to deform and contact a second portion of staging surface while experiencing the mechanical strain, wherein the second portion of the staging surface is further configured to not contact the piezoelectric component when not experiencing the mechanical strain; and

powering a device located on the wheel using the energy.

17. The method of claim 16 , further comprising:

receiving, at a processor located within a vehicle body, sensor data from the device, wherein the device is configured to produce the sensor data while disposed on the wheel;

determining a parameter value based on the sensor data; and

performing an action based on the parameter value meeting a threshold value.

18. The method of claim 17 , wherein the parameter value is based on the sensor data and data received from a remote server.

19. The method of claim 17 , wherein the device is configured to send the sensor data to the processor via a wireless connection.

20. The method of claim 16 , wherein the piezoelectric component is configured to contact a surface on which the wheel is configured to rotate.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 6, 2019
From: GRISWOLD, RYAN; SZE, JOHN; VIVEK, VIBHU
To: TDK CORPORATION
Reel/Frame 051200/0533 →
Continuity (2)
Provisional Application 62878225 · Jul 24, 2019
Related Publication 20210028725A1 · Jan 28, 2021
Cited By (1)
US 12,744,397