COIL UNIT

• US 20180141451A1
• Filed: 11/10/2017
• Published: 05/24/2018
• Est. Priority Date: 11/22/2016
• Status: Active Grant

• Current Assignee: Subaru Corp.
• Original Assignee: Subaru Corp.
• Inventors: TOTSUKA, Yuta
• Granted Patent: US 10,471,845 B2
• Time in Patent Office: Days
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: B60L 53/39 with position-responsive activation of primary coils
• CPC Class Codes: H01F 27/006 with special arrangement or spacing of turns of the winding(s), e.g. to produce desired self-resonance
• CPC Class Codes: H01F 27/2871 Pancake coils
• CPC Class Codes: H01F 27/2876 Cooling cooling transformers and inductances in general H01F27/08
• CPC Class Codes: H01F 27/36 Electric or magnetic shields or screens movable for varying inductance H01F21/10
• CPC Class Codes: H01F 27/361 made of combinations of electrically conductive material and ferromagnetic material
• 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: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02K 3/14 with transposed conductors, e.g. twisted conductors
• CPC Class Codes: H02K 3/24 with channels or ducts for cooling medium between the conductors
• 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

Abstract

A coil unit configured to be used in contactless transmission of electric power for running a vehicle includes a coil, and a plate-shaped coil holder that holds the coil. The coil holder has a spiral-shaped first passage and a spiral-shaped second passage. The first passage is formed along a plate surface of the coil holder, and a conductor constituting the coil is disposed in the first passage. The second passage is formed along the first passage and at a position that is different from a position of the first passage in at least a direction extending along the plate surface, and a cooling member is disposed in the second passage.

Claims

1. A coil unit configured to be used in contactless transmission of electric power for running a vehicle, the coil unit comprising:

a coil; and

a plate-shaped coil holder that holds the coil,

wherein the coil holder comprises;

a spiral-shaped first passage in which a conductor constituting the coil is disposed, the first passage being formed along a plate surface of the coil holder, and

a spiral-shaped second passage in which a cooling member is disposed, the second passage being formed along the first passage and at a position that is different from a position of the first passage in at least a direction extending along the plate surface.

2. The coil unit according to claim 1,

wherein the first passage is a groove formed in a first plate surface of the coil holder, and

wherein the second passage is provided in a plate surface on an opposite side with respect to the first plate surface of the coil holder.

3. The coil unit according to claim 2,

wherein assuming that an up-down direction is a plate thickness direction of the coil holder, and an up direction is a direction extending towards the first plate surface from the plate surface on the opposite side, an upper edge of the second passage is above a lower edge of the first passage in a cross-section perpendicular to a direction in which a route of the first passage extends and to a direction in which a route of the second passage extends.

4. The coil unit according to claim 2,

wherein the second passage is a groove formed in the plate surface on the opposite side of the coil holder, and

wherein the cooling material is a coolant pipe through which a coolant is passed.

5. The coil unit according to claim 3,

wherein the second passage is a groove formed in the plate surface on the opposite side of the coil holder, and

wherein the cooling material is a coolant pipe through which a coolant is passed.

6. The coil unit according to claim 1,

wherein the first passage and the second passage are grooves that are formed in a same plate surface of the coil holder, and

wherein the cooling material is a coolant pipe that is rigid through which a coolant is passed.