Method for manufacturing a capacitive storage element, storage element and its use

• US 9,583,263 B2
• Filed: 09/21/2011
• Issued: 02/28/2017
• Est. Priority Date: 11/11/2010
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Walch, Bert
• Primary Examiner(s): FERGUSON, DION
• Application Number:
  US13/884,200
• Publication Number:
  US 20130301188A1
• Time in Patent Office: 1,987 Days
• US Class Current: 1/1
• CPC Class Codes: B60L 50/40 using propulsion power supplied by capacitors
• CPC Class Codes: B60L 50/64 Constructional details of batteries specially adapted for electric vehicles
• CPC Class Codes: H01G 11/52 Separators
• CPC Class Codes: H01G 4/12 Ceramic dielectrics H01G4/085 takes precedence
• CPC Class Codes: H01G 4/1218 based on titanium oxides or titanates H01G4/1245 takes precedence
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y10T 29/435 Solid dielectric type

Abstract

A method for manufacturing a capacitive storage element having a layer system on one side of a porous substrate, which is designed as a conductive substrate or has a conductive surface layer at least on the one side, the layer system having a layer sequence of a dielectric titanate layer and an electrically conductive layer. It is provided that to form a closed titanate layer having an adjustable minimum layer thickness, an external electrical field is applied in the direction of the layer sequence, and when the field is applied, a fluid containing titanate particles is applied to the substrate. A corresponding capacitive storage element and the use of a capacitive storage element as a storage element of an electrical energy storage unit for supplying energy to an electric drive or hybrid drive of a motor vehicle are also described.

Claims

1. A method for manufacturing a capacitive storage element having a layer system on one side of a porous substrate, which is designed as a conductive substrate, the layer system having a layer sequence of a dielectric titanate layer and an electrically conductive layer, the method comprising:

supplying the porous substrate;

forming a closed titanate layer having an adjustable minimal layer thickness on the one side of the substrate and directly in contact with the one side of the substrate by applying an external electrical field in a direction of the layer sequence transversely to the plane of the layer system, and when the field is applied, applying a fluid containing titanate particles to the substrate; and

applying the electrically conductive layer to the closed titanate layer.

2. The method as recited in claim 1, wherein the storage element is a storage element for an electrical energy storage unit for supplying energy to an electric drive or hybrid drive of a motor vehicle, the layer thickness of the closed titanate layer being set at ≧

0.2 μ

m at each point in the layer.

3. The method as recited in claim 1, wherein the forming closed titanate layer is heated to 700°

C. to 900°

C. while the field continues to be applied.

4. The method as recited in claim 1, wherein the conductive substrate is one of formed from a conductive porous ceramic body or an activated carbon body.

5. The method as recited in claim 1, wherein the titanate layer is a barium titanate layer.

6. The method according to claim 1, wherein the fluid is an alcohol.

7. A method, comprising:

providing the capacitive storage element having a porous substrate and a layer system on one side of the porous substrate, the substrate being designed as a conductive substrate, and the layer system having a layer sequence of a dielectric titanate layer on the one side of the substrate and directly in contact with the one side of the substrate, and an electrically conductive layer provided on the titanate layer, the titanate layer being designed as a closed titanate layer made of titanate particles whose layer thickness is ≧

0.2 μ

m at all points in the titanate layer, wherein the titanate layer is formed by applying an external electrical field in a direction of the layer sequence transversely to the plane of the layer system; and

using the capacitive storage element as a storage element of an electrical energy storage unit for supplying energy to an electric drive or a hybrid drive of a motor vehicle.