Inductive coupling wand having a molded magnetic core

• US 5,719,483 A
• Filed: 07/29/1996
• Issued: 02/17/1998
• Est. Priority Date: 11/15/1993
• Status: Expired due to Fees

• Current Assignee: Delco Electronics Corporation (Motors Liquidation Co. GUC Trust)
• Original Assignee: Delco Electronics Corporation (Motors Liquidation Co. GUC Trust)
• Inventors: Abbott, Russell M., Quon, William
• Primary Examiner(s): Wong, Peter S.
• Assistant Examiner(s): Law, Patrick B.
• Application Number:
  US08/696,015
• Time in Patent Office: 568 Days
• Field of Search: 320/2, 320/21, 336/66
• US Class Current: 320/108
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: B60L 53/34 Plug-like or socket-like devices specially adapted for contactless inductive charging of electric vehicles positioning means for charging devices using inductive energy transfer B60L53/38
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• 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 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y10S 336/02 Separable

Abstract

Inductive charging systems comprising improved charging wands that are coupled between a source of power and a charging port that is coupled to a battery of an electric vehicle. The improvement provided by the present invention is that the charging wand has its magnetic core molded into its body. In one embodiment, a magnetic core is directly molded into the body of the charging wand. In another embodiment, the magnetic core is molded into a plastic ring that surrounds the core which in turn is secured into the body of the charging wand. The present invention improves the assembly process for charging wands by eliminating the wide tolerance range associated with core fabrication. Molding magnetic cores into the inductive charge wand eliminates the requirement for machining the side walls of the cores. By molding the cores directly into the wand or by molding the ring around the core and securing the molded assembly into the wand results in substantial cost savings by eliminating the need to machine the cores to exact tolerances.

Claims

1. A charging device for use in an inductive charging system wherein the charging device is coupled to a power source and insertable into a charging port that is coupled to a battery, the charging device comprising:

a magnetic core;

a surrounding member molded about the periphery of said magnetic core;

a body member having an opening for receiving said magnetic core and surrounding member, said surrounding member being secured to said body member, the surrounding member having a groove that mates with a lip formed along an edge of the opening in the body member; and

a primary winding adapted to carry current from the power source, said primary winding being disposed in the body member in proximity to said magnetic core.