Coil of charging paddle

• US 6,337,556 B2
• Filed: 12/07/2000
• Issued: 01/08/2002
• Est. Priority Date: 12/10/1999
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
• Original Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
• Inventors: Kutsuzawa, Hidechika
• Primary Examiner(s): Tso, Edward H.
• Application Number:
  US09/731,594
• Publication Number:
  US 20010003415A1
• Time in Patent Office: 397 Days
• Field of Search: 320/107, 320/108, 320/109, 320/150
• 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 litz wire comprising a bundle of strands; and

a coating for coating the litz wire, wherein the coating comprises a heat-shrinkable resin, and wherein the coating is heat shrunk for tightly 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 litz wire further comprises a fine fiber layer surrounding the bundle of the strands.

5. The coil according to claim 1, wherein the litz wire lies approximately in a single plane.

6. The coild according to claim 1, wherein the litz wire is wound a plurality of times to form windings and the windings are generally radially arranged.

7. The coil according to claim 6, further comprising a bobbin about which the litz wire is wound.

8. The coil according to claim 7, wherein the bobbin includes a positioner for determining the position of the litz wire.

9. The coil according to claim 8, 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.

10. 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 tightly holding the strands of the litz wire together.

11. The coil according to claim 10, 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.

12. An inductive charging paddle, comprising:

(a) a core, and

(b) a coil located about said core, said coil comprising;

(1) a litz wire comprising a bundle of strands; and

(2) a coating for coating the litz wire, wherein the coating comprises a heat-shrinkable resin, and wherein the coating is heat shrunk for tightly holding the strands together,

wherein the coil is connected to an electricity supplying apparatus through a cable.

13. The inductive charging paddle according to claim 12, wherein the coating comprises a tubing.

14. The inductive charging paddle according to claim 12, wherein the coating comprises polyurethane.

15. The inductive charging paddle according to claim 12, wherein the litz wire further comprises a fine fiber layer surrounding the bundle of the strands.

16. The inductive charging paddle according to claim 12, wherein the litz wire lies approximately in a single plane.

17. The inductive charging paddle according to claim 12, wherein the litz wire is wound a plurality of times to form windings and the windings are generally radially arranged.

18. The inductive charging paddle according to claim 17, wherein the coil further comprises a bobbin about which the litz wire is wound, wherein the bobbin includes a positioner for determining the position of the litz wire, wherein the bobbin includes a cylindrical body and a pair of opposed flanges, which extend radially from the axial ends of the cylindrical body, and wherein the positioner projects from a side of each flange towards the opposite flange.