Method for producing flexible EAP generators

• US 9,484,520 B2
• Filed: 07/16/2012
• Issued: 11/01/2016
• Est. Priority Date: 07/29/2011
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Denes, Istvan
• Primary Examiner(s): San Martin, J.
• Application Number:
  US14/235,843
• Publication Number:
  US 20140239775A1
• Time in Patent Office: 1,569 Days
• Field of Search: 310/328
• US Class Current: 1/1
• CPC Class Codes: H10N 30/01 Manufacture or treatment
• CPC Class Codes: H10N 30/05 Manufacture of multilayered piezoelectric or electrostrictive devices, or parts thereof, e.g. by stacking piezoelectric bodies and electrodes
• CPC Class Codes: H10N 30/2046 adapted for multi-directional bending displacement
• CPC Class Codes: H10N 30/306 Cantilevers
• CPC Class Codes: H10N 30/505 Annular cross-section
• CPC Class Codes: H10N 30/857 Macromolecular compositions
• CPC Class Codes: H10N 30/871 Single-layered electrodes of multilayer piezoelectric or electrostrictive devices, e.g. internal electrodes

Abstract

In a method for manufacturing electroactive polymer generators, a strip, including one layer of an electroactive polymer and electrodes applied to sections of this layer, is spirally wound in such a way that multiple electrodes are situated congruently on top of each other, in each case two electrodes situated on top of each other being separated from each other by a layer of electroactive polymer.

Claims

1. An electroactive polymer stack, comprising:

a spirally wound strip, the strip having a planar surface extending in a length and a width, the length being larger than the width, and the strip further having a thickness which is smaller than the length and the width, the strip being wound about a center axis in such a way that the width of the planar surface extends in a direction perpendicular to the center axis, wherein the strip has one layer of an electroactive polymer and planar electrodes applied to sections of the electroactive polymer layer, and wherein multiple planar electrodes which do not directly adjoin each other on the strip prior to being wound are congruently situated on top of each other after being wound, in each case two planar electrodes which are situated on top of each other being separated from each other by at least one layer of the electroactive polymer.

2. The electroactive polymer stack as recited in claim 1, wherein the electroactive polymer stack has one of (i) two ring sectors, (ii) three ring sectors, or (iii) four ring sectors, which represent electrodes situated congruently on top of each other.

3. The electroactive polymer stack as recited in claim 1, wherein the electroactive polymer stack has a rod which is (i) situated in a cavity delimited by the inner circumference of the spiral and (ii) surrounded by the spiral in a form-locked manner.

4. The electroactive polymer stack as recited in claim 3, wherein the rod has one of a circular, oval, triangular, quadrangular, polygonal or star-shaped cross section.

5. A method for manufacturing an electroactive polymer generator, comprising:

spirally winding a strip about a center axis, the strip including a layer of an electroactive polymer and multiple planar electrodes applied to sections of the electroactive polymer layer, wherein the strip is spirally wound in such a way that multiple planar electrodes are situated congruently on top of each other, in each case two planar electrodes which are situated on top of each other being separated from each other by at least one layer of the electroactive polymer;

wherein the strip has a planar surface extending in a length and a width, the length being larger than the width, and the strip further has a thickness which is smaller than the length and the width, the strip being wound in such a way that the width of the planar surface of the strip extends in a direction perpendicular to the center axis.

6. The method as recited in claim 5, wherein in each case two electrodes situated on top of each other do not immediately adjoin each other relative to the strip.

7. The method as recited in claim 6, wherein each winding of the strip is carried out in such a way that one of every second, third or fourth electrode of the strip is situated congruently on top of each other in the stack.

8. The method as recited in claim 7, wherein the windings of the spiral are joined to each other or held together.

9. The method as recited in claim 7, wherein the strip is wound around a rod in a form-locked manner, the rod having one of a circular, oval, triangular, quadrangular, polygonal or star-shaped cross section.