Coil of charging paddle

• US 20010003415A1
• Filed: 12/07/2000
• Published: 06/14/2001
• Est. Priority Date: 12/10/1999
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
• Original Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
• Inventors: Kutsuzawa, Hidechika
• Granted Patent: US 6,337,556 B2
• Time in Patent Office: Days
• US Class Current: 320/108
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

An inductive charging paddle includes a coil, which is located about a core. The coil is connected to an electricity supplying apparatus through a cable. The coil includes a bobbin and a line wound about the bobbin. The line includes a litz wire and a tubing for coating the litz wire. The tubing is made of a heat-shrinkable resin and is heat shrunk for holding strands of the litz wire together. The strands in the litz wire are prevented from rubbing against each other by a simple structure.

Claims

1. A coil used in an inductive charging paddle, wherein the coil is located about a core, which is located in the paddle, and wherein the coil is connected to an electricity supplying apparatus through a cable, the coil comprising:

a wire comprising a bundle of strands; and

a coating for coating the wire, wherein the coating comprises a heat-shrinkable resin, and wherein the coating is heat shrunk for holding the strands together.

2. The coil according to

claim 1

, wherein the coating comprises a tubing.

3. The coil according to

claim 1

, wherein the coating comprises polyurethane.

4. The coil according to

claim 1

, wherein the wire comprises a litz wire.

5. The coil according to

claim 1

, wherein the wire further comprises a fine fiber layer surrounding the bundle of the strands.

6. The coil according to

claim 1

, wherein the wire lies approximately in a single plane.

7. The coil according to

claim 1

, wherein the wire is wound a plurality of times to form windings and the windings are generally radially arranged.

8. The coil according to

claim 7

, further comprising a bobbin about which the wire is wound.

9. The coil according to

claim 8

, wherein the bobbin includes a positioner for determining the position of the wire.

10. The coil according to

claim 9

, wherein the bobbin includes a cylindrical body and a pair of opposed flanges, which extend radially from the axial ends of the cylindrical body, wherein the positioner projects from a side of each flange towards the opposite flange.

11. A coil used in an inductive charging paddle, wherein the coil is located about a core, which is located in the paddle, and wherein the coil is connected to an electricity supplying apparatus through a cable, the coil comprising:

a bobbin;

a litz wire wound about the bobbin, wherein the litz wire comprises a bundle of twisted, enameled strands; and

a tubing that covers the litz wire, wherein the tubing comprises a heat-shrinkable resin, and wherein the tubing is heat shrunk for holding the strands of the litz wire together.

12. The coil according to

claim 11

, wherein the litz wire lies approximately in a single plane, and wherein the bobbin includes a projection for determining the position of the litz wire.