Hand tool device having at least one charging coil

• US 10,170,238 B2
• Filed: 09/11/2012
• Issued: 01/01/2019
• Est. Priority Date: 09/20/2011
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Rejman, Marcin, Lohr, Guenter, Mack, Juergen, Dietzel, Friederike, Amann, Volker
• Primary Examiner(s): Grant, Robert
• Assistant Examiner(s): Trischler, John
• Application Number:
  US13/609,878
• Publication Number:
  US 20130069595A1
• Time in Patent Office: 2,303 Days
• Field of Search: 320108, 320114, 336 15, 336 90, 336117, 336177, 336212, 336219, 336229, 336233, 336234, 307104, 307 101
• CPC Class Codes: H01F 27/245 made from sheets, e.g. grain-oriented H01F27/26 takes precedence
• CPC Class Codes: H01F 27/26 Fastening parts of the core together; Fastening or mounting the core on casing or support on coil H01F27/30
• CPC Class Codes: H01F 27/263 Fastening parts of the core together
• CPC Class Codes: H01F 27/30 Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
• CPC Class Codes: H01F 27/306 Fastening or mounting coils or windings on core, casing or other support
• 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 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas

Abstract

A hand tool device having at least one charging coil, which includes at least one coil core which is at least partially made of a ceramic material and which is provided for transmitting energy. The coil core may be configured as a composite component.

Claims

1. A hand tool device, comprising:

at least one charging coil for inductive charging which includes at least one coil core which is at least partially made of a ceramic material and which is provided for transmitting energy, and at least one wound electrical conductor;

wherein the coil core is configured as a composite component, has at least two magnetic field bundling elements including an upper part bundling element and a lower part bundling element which are made of a ceramic material, and are at least partially formed by a film which glues the upper part bundling element and the lower part bundling element, wherein the upper part bundling element has a diameter that is three times a diameter of the lower part bundling element,

wherein the film is attached to an upper side of the at least one magnetic field bundling element, and the at least one wound electrical conductor is arranged on a lower side of the at least one magnetic field bundling element, wherein the upper side is facing away from the at least one magnetic field bundling element in a first direction and the lower side is facing away from the at least one magnetic field bundling element in a second direction, wherein the first direction is opposite to the second direction,

wherein the entire at least one magnetic field bundling element is surrounded by the film,

wherein the coil core has a toroid shape,

wherein the magnetic field bundling element has a toroid shape,

wherein the magnetic field bundling element surrounds the wound electrical conductor only on an upper side and an inner side,

wherein the coil core is at least partially made of a soft elastic material,

wherein the coil core is made of at least one sintered powder or pellets.

2. The hand tool device of claim 1, wherein the film forms at least one part of a surface of the coil core.

3. The hand tool device of claim 1, wherein the wound electrical conductor is configured as a disk.

4. The hand tool device of claim 1, wherein the wound electrical conductor is ring-shaped.

5. The hand tool device of claim 1, wherein the thickness of the film is a maximum of 1 mm.

6. The hand tool device of claim 1, wherein the wound electrical conductor is coiled onto a coil carrier.

7. The hand tool device of claim 6, wherein the coil carrier surrounds the wound electrical conductor on an upper side, a lower side and an inner side.

8. The hand tool device of claim 1, wherein the magnetic field bundling element is configured as a disk.

9. The hand tool device of claim 8, wherein the magnetic field bundling element is configured as an annular disk.

10. A hand tool battery, comprising:

at least one charging coil for inductive charging which includes at least one coil core which is at least partially made of a ceramic material and which is provided for transmitting energy, and at least one wound electrical conductor;

wherein the coil core is configured as a composite component, has at least two magnetic field bundling elements including an upper part bundling element and a lower part bundling element which are made of a ceramic material, and are at least partially formed by a film which glues the upper part bundling element and the lower part bundling element, wherein the upper part bundling element has a diameter that is three times a diameter of the lower part bundling element,

wherein the film is attached to an upper side of the at least one magnetic field bundling element, and the at least one wound electrical conductor is arranged on a lower side of the at least one magnetic field bundling element, wherein the upper side is facing away from the at least one magnetic field bundling element in a first direction and the lower side is facing away from the at least one magnetic field bundling element in a second direction, wherein the first direction is opposite to the second direction,

wherein the thickness of the film is a maximum of 1 mm,

wherein the entire at least one magnetic field bundling element is surrounded by the film,

wherein the coil core has a toroid shape,

wherein the magnetic field bundling element has a toroid shape,

wherein the magnetic field bundling element surrounds the wound electrical conductor only on an upper side and an inner side,

wherein the coil core is at least partially made of a soft elastic material,

wherein the coil core is made of at least one sintered powder or pellets.

11. A charging device, comprising:

at least one charging coil for inductive charging which includes at least one coil core which is at least partially made of a ceramic material and which is provided for transmitting energy, and at least one wound electrical conductor;

wherein the coil core is configured as a composite component, has at least two magnetic field bundling elements including an upper part bundling element and a lower part bundling element which are made of a ceramic material, and are at least partially formed by a film which glues the upper part bundling element and the lower part bundling element, wherein the upper part bundling element has a diameter that is three times a diameter of the lower part bundling element,

wherein the film is attached to an upper side of the at least one magnetic field bundling element, and the at least one wound electrical conductor is arranged on a lower side of the at least one magnetic field bundling element, wherein the upper side is facing away from the at least one magnetic field bundling element in a first direction and the lower side is facing away from the at least one magnetic field bundling element in a second direction, wherein the first direction is opposite to the second direction,

wherein the entire at least one magnetic field bundling element is surrounded by the film,

wherein the coil core has a toroid shape,

wherein the magnetic field bundling element has a toroid shape,

wherein the magnetic field bundling element surrounds the wound electrical conductor only on an upper side and an inner side

wherein the coil core is at least partially made of a soft elastic material,

wherein the coil core is made of at least one sintered powder or pellets.

12. A hand tool, comprising:

at least one charging coil for inductive charging which includes at least one coil core which is at least partially made of a ceramic material and which is provided for transmitting energy, and at least one wound electrical conductor;

wherein the coil core is configured as a composite component, has at least two magnetic field bundling elements including an upper part bundling element and a lower part bundling element which are made of a ceramic material, and are at least partially formed by a film which glues the upper part bundling element and the lower part bundling element, wherein the upper part bundling element has a diameter that is three times a diameter of the lower part bundling element,

wherein the film is attached to an upper side of the at least one magnetic field bundling element, and the at least one wound electrical conductor is arranged on a lower side of the at least one magnetic field bundling element, wherein the upper side is facing away from the at least one magnetic field bundling element in a first direction and the lower side is facing away from the at least one magnetic field bundling element in a second direction, wherein the first direction is opposite to the second direction,

wherein the entire at least one magnetic field bundling element is surrounded by the film,

wherein the coil core has a toroid shape,

wherein the magnetic field bundling element has a toroid shape,

wherein the magnetic field bundling element surrounds the wound electrical conductor only on an upper side and an inner side,

wherein the coil core is at least partially made of a soft elastic material,

wherein the coil core is made of at least one sintered powder or pellets.

13. A system, comprising:

at least one of a hand tool battery, a charging device, and a hand tool;

wherein each of the hand tool battery, the charging device, and the hand tool includes;

at least one charging coil for inductive charging which includes at least one coil core which is at least partially made of a ceramic material and which is provided for transmitting energy, and at least one wound electrical conductor;

wherein the coil core is configured as a composite component, has at least two magnetic field bundling elements including an upper part bundling element and a lower part bundling element which are made of a ceramic material, and are at least partially formed by a film which glues the upper part bundling element and the lower part bundling element, wherein the upper part bundling element has a diameter that is three times a diameter of the lower part bundling element,

wherein the film is attached to an upper side of the at least one magnetic field bundling element, and the at least one wound electrical conductor is arranged on a lower side of the at least one magnetic field bundling element, wherein the upper side is facing away from the at least one magnetic field bundling element in a first direction and the lower side is facing away from the at least one magnetic field bundling element in a second direction, wherein the first direction is opposite to the second direction,

wherein the entire at least one magnetic field bundling element is surrounded by the film,

wherein the coil core has a toroid shape,

wherein the magnetic field bundling element has a toroid shape,

wherein the magnetic field bundling element surrounds the wound electrical conductor only on an upper side and an inner side,

wherein the coil core is at least partially made of a soft elastic material,

wherein the coil core is made of at least one sintered powder or pellets.